Move memory limiting to capture level

Should have way better performance, and can fix a few bugs

.deepsource.toml

@@ -0,0 +1,28 @@
+version = 1
+
+exclude_patterns = [
+  "vendor/**"
+]
+
+[[analyzers]]
+name = "go"
+enabled = true
+
+  [analyzers.meta]
+  import_paths = ["github.com/ankitdobhal/goreplay"]
+
+[[analyzers]]
+name = "docker"
+enabled = true
+
+[[analyzers]]
+name = "ruby"
+enabled = true
+
+[[analyzers]]
+name = "javascript"
+enabled = true
+
+  [analyzers.meta]
+  environment = ["nodejs"]
+

.github/dependabot.yaml

@@ -0,0 +1,10 @@
+version: 2
+updates:
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    pull-request-branch-name:
+      # Separate sections of the branch name with a hyphen
+      separator: "-"

.github/workflows/ci-docker.yaml

@@ -0,0 +1,38 @@
+name: ci
+on:
+  release:
+    types: [published]
+jobs:
+  docker-build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: "Checkout repository"
+        uses: actions/checkout@v2
+      -
+        name: "Set up Docker Buildx"
+        uses: docker/setup-buildx-action@v1
+      -
+        name: "Cache Docker layers"
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+      -
+        name: "Login to Container Registry"
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: "Build and push docker image"
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          push: true
+          tags: ${{ github.repository }}:${{ github.event.release.tag_name }}
+          build-args: RELEASE_VERSION=${{ github.event.release.tag_name }}
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,mode=max,dest=/tmp/.buildx-cache

.github/workflows/ci-test.yaml

@@ -0,0 +1,29 @@
+name: test
+on: [push, pull_request]
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.14.x, 1.15.x] # two latest minor versions
+    runs-on: ubuntu-latest
+    steps:
+    - name: update package index
+      run: sudo apt-get update
+    - name: install libpcap
+      run: sudo apt-get install libpcap-dev -y
+    - name: install Go
+      uses: actions/setup-go@v2
+      with:
+        go-version: ${{ matrix.go-version }}
+    - name: checkout code
+      uses: actions/checkout@v2
+    - uses: actions/cache@v2
+      with:
+        path: |
+          ~/go/pkg/mod              # Module download cache
+          ~/.cache/go-build         # Build cache (Linux)
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go-
+    - name: test
+      run: sudo go test ./... -v -timeout 120s

.gitignore

@@ -1,5 +1,8 @@
 *.swp
 *.gor
+*.rpm
+*.dep
+*.pkg
 
 *.out
 
@@ -21,6 +24,7 @@ gor
 
 .DS_Store
 
+goreplay
 corpus
 crashers
 suppressions

.travis.yml

@@ -1,6 +0,0 @@
-language: go
-go: 1.14
-script: sudo -E bash -c "source /etc/profile && eval '$(gimme 1.14)' && export GOPATH=$HOME/gopath:$GOPATH && go get && GORACE='halt_on_error=1' go test ./... -v -timeout 120s -race"
-
-before_install:
-  - sudo apt-get install libpcap-dev -y

Dockerfile

@@ -1,6 +1,9 @@
-FROM alpine:latest as builder
+FROM alpine:3.12 as builder
+
+ARG RELEASE_VERSION
+
 RUN apk add --no-cache ca-certificates openssl
-RUN wget https://github.com/buger/goreplay/releases/download/v1.0.0/gor_1.0.0_x64.tar.gz -O gor.tar.gz
+RUN wget https://github.com/buger/goreplay/releases/download/${RELEASE_VERSION}/gor_${RELEASE_VERSION}_x64.tar.gz -O gor.tar.gz
 RUN tar xzf gor.tar.gz
 
 FROM scratch

Dockerfile.dev

@@ -3,8 +3,8 @@ FROM golang:1.14
 RUN apt-get update && apt-get install ruby vim-common -y
 
 RUN apt-get install flex bison -y
-RUN wget http://www.tcpdump.org/release/libpcap-1.8.1.tar.gz && tar xzf libpcap-1.8.1.tar.gz && cd libpcap-1.8.1 && ./configure && make install
-RUN apt-get install default-jre default-jdk -y
+RUN wget http://www.tcpdump.org/release/libpcap-1.9.1.tar.gz && tar xzf libpcap-1.9.1.tar.gz && cd libpcap-1.9.1 && ./configure && make install
+
 RUN go get github.com/google/gopacket
 RUN go get -u golang.org/x/lint/golint
 

Makefile

@@ -7,24 +7,57 @@ PREFIX=
 RUN = docker run -v `pwd`:$(SOURCE_PATH) -e AWS_ACCESS_KEY_ID=$(AWS_ACCESS_KEY_ID) -e AWS_SECRET_ACCESS_KEY=$(AWS_SECRET_ACCESS_KEY) -p 0.0.0.0:$(PORT):$(PORT) -t -i $(CONTAINER)
 BENCHMARK = BenchmarkRAWInput
 TEST = TestRawListenerBench
+BIN_NAME = gor
 VERSION = DEV-$(shell date +%s)
 LDFLAGS = -ldflags "-X main.VERSION=$(VERSION)$(PREFIX) -extldflags \"-static\" -X main.DEMO=$(DEMO)"
 MAC_LDFLAGS = -ldflags "-X main.VERSION=$(VERSION)$(PREFIX) -X main.DEMO=$(DEMO)"
 FADDR = ":8000"
 
+FPMCOMMON= \
+    --name goreplay \
+    --description "GoReplay is an open-source network monitoring tool which can record your live traffic, and use it for shadowing, load testing, monitoring and detailed analysis." \
+    -v $(VERSION) \
+    --vendor "Leonid Bugaev" \
+    -m "<support@goreplay.org>" \
+    --url "https://goreplay.org" \
+    -s dir \
+    -C /tmp/gor-build \
+
 release: release-x64 release-mac
 
 release-bin:
-	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=amd64  -i gor go build -o gor -tags netgo $(LDFLAGS)
+	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=amd64  -i $(CONTAINER) go build -o $(BIN_NAME) -tags netgo $(LDFLAGS)
+
+release-bin-mac:
+	GOOS=darwin go build -o $(BIN_NAME) $(MAC_LDFLAGS)
 
 release-x64:
-	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=amd64  -i $(CONTAINER) go build -o gor -tags netgo $(LDFLAGS) && tar -czf gor_$(VERSION)$(PREFIX)_x64.tar.gz gor && rm gor
+	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=amd64  -i $(CONTAINER) go build -o $(BIN_NAME) -tags netgo $(LDFLAGS)
+	tar -czf gor_$(VERSION)$(PREFIX)_x64.tar.gz $(BIN_NAME)
+	mkdir -p /tmp/gor-build
+	mv ./$(BIN_NAME) /tmp/gor-build/$(BIN_NAME)
+	cd /tmp/gor-build
+	rm -f goreplay_$(VERSION)_amd64.deb
+	rm -f goreplay-$(VERSION)-1.x86_64.rpm
+	fpm $(FPMCOMMON) -a amd64 -t deb ./=/usr/local/bin
+	fpm $(FPMCOMMON) -a amd64 -t rpm ./=/usr/local/bin
+	rm -rf /tmp/gor-build
 
 release-x86:
-	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=386 -i $(CONTAINER) go build -o gor -tags netgo $(LDFLAGS) && tar -czf gor_$(VERSION)$(PREFIX)_x86.tar.gz gor && rm gor
+	docker run -v `pwd`:$(SOURCE_PATH) -t --env GOOS=linux --env GOARCH=386 -i $(CONTAINER) go build -o $(BIN_NAME) -tags netgo $(LDFLAGS)
+	tar -czf gor_$(VERSION)$(PREFIX)_x86.tar.gz $(BIN_NAME)
+	rm $(BIN_NAME)
 
 release-mac:
-	go build -o gor $(MAC_LDFLAGS) && tar -czf gor_$(VERSION)$(PREFIX)_mac.tar.gz gor && rm gor
+	go build -o $(BIN_NAME) $(MAC_LDFLAGS)
+	tar -czf gor_$(VERSION)$(PREFIX)_mac.tar.gz $(BIN_NAME)
+	mkdir -p /tmp/gor-build
+	mv ./$(BIN_NAME) /tmp/gor-build/$(BIN_NAME)
+	cd /tmp/gor-build
+	rm -f goreplay-$(VERSION).pkg
+	fpm $(FPMCOMMON) -a amd64 -t osxpkg ./=/usr/local/bin
+	rm -rf /tmp/gor-build
+
 
 install:
 	go install $(MAC_LDFLAGS)
@@ -33,7 +66,7 @@ build:
 	docker build -t $(CONTAINER) -f Dockerfile.dev .
 
 profile:
-	go build && ./gor --output-http="http://localhost:9000" --input-dummy 0 --input-raw :9000 --input-http :9000 --memprofile=./mem.out --cpuprofile=./cpu.out --stats --output-http-stats --output-http-timeout 100ms
+	go build && ./$(BIN_NAME) --output-http="http://localhost:9000" --input-dummy 0 --input-raw :9000 --input-http :9000 --memprofile=./mem.out --cpuprofile=./cpu.out --stats --output-http-stats --output-http-timeout 100ms
 
 lint:
 	$(RUN) golint $(PKG)
@@ -69,7 +102,7 @@ profile_test:
 
 # Used mainly for debugging, because docker container do not have access to parent machine ports
 run:
-	$(RUN) go run $(LDFLAGS) $(SOURCE) --input-dummy=0 --output-http="http://localhost:9000" --input-raw-track-response --input-raw 127.0.0.1:9000 --verbose --debug --middleware "./examples/middleware/echo.sh" --output-file requests.gor
+	$(RUN) go run $(LDFLAGS) $(SOURCE) --input-dummy=0 --output-http="http://localhost:9000" --input-raw-track-response --input-raw 127.0.0.1:9000 --verbose 0 --middleware "./examples/middleware/echo.sh" --output-file requests.gor
 
 run-2:
 	$(RUN) go run $(LDFLAGS) $(SOURCE) --input-raw :8000 --input-raw-bpf-filter "dst port 8000" --output-stdout --output-http "http://localhost:8000" --input-dummy=0
@@ -97,7 +130,7 @@ bash:
 
 
 FPMCOMMON= \
-    --name goreplay \
+    --name gor \
     --description "GoReplay is an open-source network monitoring tool which can record your live traffic, and use it for shadowing, load testing, monitoring and detailed analysis." \
     -v $(VERSION) \
     --vendor "Leonid Bugaev" \
@@ -108,6 +141,6 @@ FPMCOMMON= \
 
 build_packages:
 	mkdir -p /tmp/gor-build
-	go build -i -o /tmp/gor-build/gor
+	go build -i -o /tmp/gor-build/$(BIN_NAME)
 	fpm $(FPMCOMMON) -a amd64 -t deb ./=/usr/local/bin
 	fpm $(FPMCOMMON) -a amd64 -t rpm ./=/usr/local/bin

byteutils/byteutils.go

@@ -1,6 +1,10 @@
-// Package byteutils probvides helpers for working with byte slices
+// Package byteutils provides helpers for working with byte slices
 package byteutils
 
+import (
+	"unsafe"
+)
+
 // Cut elements from slice for a given range
 func Cut(a []byte, from, to int) []byte {
 	copy(a[from:], a[to:])
@@ -41,3 +45,8 @@ func Replace(a []byte, from, to int, new []byte) []byte {
 	copy(a[from:], new)
 	return a
 }
+
+// SliceToString preferred for large body payload (zero allocation and faster)
+func SliceToString(buf []byte) string {
+	return *(*string)(unsafe.Pointer(&buf))
+}

byteutils/byteutils_test.go

@@ -30,3 +30,12 @@ func TestReplace(t *testing.T) {
 		t.Error("Should replace when replacement length bigger")
 	}
 }
+
+func BenchmarkStringtoSlice(b *testing.B) {
+	var s string
+	var buf [1 << 20]byte
+	for i := 0; i < b.N; i++ {
+		s = SliceToString(buf[:])
+	}
+	_ = s // avoid gc to optimize away the loop body
+}

capture/capture.go

@@ -0,0 +1,546 @@
+package capture
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"net"
+	"os"
+	"runtime"
+	"sync"
+	"time"
+
+	"github.com/buger/goreplay/size"
+	"github.com/buger/goreplay/tcp"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+	"github.com/google/gopacket/pcap"
+	"github.com/pbnjay/memory"
+	"golang.org/x/sys/unix"
+)
+
+// PacketHandler is a function that is used to handle packets
+type PacketHandler func(*tcp.Packet)
+
+// PcapOptions options that can be set on a pcap capture handle,
+// these options take effect on inactive pcap handles
+type PcapOptions struct {
+	BufferTimeout time.Duration `json:"input-raw-buffer-timeout"`
+	TimestampType string        `json:"input-raw-timestamp-type"`
+	BPFFilter     string        `json:"input-raw-bpf-filter"`
+	BufferSize    size.Size     `json:"input-raw-buffer-size"`
+	Promiscuous   bool          `json:"input-raw-promisc"`
+	Monitor       bool          `json:"input-raw-monitor"`
+	Snaplen       bool          `json:"input-raw-override-snaplen"`
+}
+
+// Listener handle traffic capture, this is its representation.
+type Listener struct {
+	sync.Mutex
+	Transport  string       // transport layer default to tcp
+	Activate   func() error // function is used to activate the engine. it must be called before reading packets
+	Handles    map[string]gopacket.ZeroCopyPacketDataSource
+	Interfaces []net.Interface
+	loopIndex  int
+	Reading    chan bool // this channel is closed when the listener has started reading packets
+	PcapOptions
+	Engine        EngineType
+	port          uint16 // src or/and dst port
+	trackResponse bool
+
+	host          string // pcap file name or interface (name, hardware addr, index or ip address)
+	maxAllowedMem int
+
+	closeDone chan struct{}
+	quit      chan struct{}
+}
+
+// EngineType ...
+type EngineType uint8
+
+// Available engines for intercepting traffic
+const (
+	EnginePcap EngineType = 1 << iota
+	EnginePcapFile
+	EngineRawSocket
+)
+
+// Set is here so that EngineType can implement flag.Var
+func (eng *EngineType) Set(v string) error {
+	switch v {
+	case "", "libpcap":
+		*eng = EnginePcap
+	case "pcap_file":
+		*eng = EnginePcapFile
+	case "raw_socket", "af_packet":
+		*eng = EngineRawSocket
+	default:
+		return fmt.Errorf("invalid engine %s", v)
+	}
+	return nil
+}
+
+func (eng *EngineType) String() (e string) {
+	switch *eng {
+	case EnginePcapFile:
+		e = "pcap_file"
+	case EnginePcap:
+		e = "libpcap"
+	case EngineRawSocket:
+		e = "raw_socket"
+	default:
+		e = ""
+	}
+	return e
+}
+
+// NewListener creates and initialize a new Listener. if transport or/and engine are invalid/unsupported
+// is "tcp" and "pcap", are assumed. l.Engine and l.Transport can help to get the values used.
+// if there is an error it will be associated with getting network interfaces
+func NewListener(host string, port uint16, transport string, engine EngineType, trackResponse bool, maxAllowedMem int) (l *Listener, err error) {
+	l = &Listener{}
+
+	l.host = host
+	l.port = port
+	l.Transport = "tcp"
+	if transport != "" {
+		l.Transport = transport
+	}
+	l.Handles = make(map[string]gopacket.ZeroCopyPacketDataSource)
+	l.trackResponse = trackResponse
+	l.closeDone = make(chan struct{})
+	l.quit = make(chan struct{})
+	l.Reading = make(chan bool)
+	l.maxAllowedMem = maxAllowedMem
+	switch engine {
+	default:
+		l.Engine = EnginePcap
+		l.Activate = l.activatePcap
+	case EngineRawSocket:
+		l.Engine = EngineRawSocket
+		l.Activate = l.activateRawSocket
+	case EnginePcapFile:
+		l.Engine = EnginePcapFile
+		l.Activate = l.activatePcapFile
+		return
+	}
+	err = l.setInterfaces()
+	if err != nil {
+		return nil, err
+	}
+	return
+}
+
+// SetPcapOptions set pcap options for all yet to be actived pcap handles
+// setting this on already activated handles will not have any effect
+func (l *Listener) SetPcapOptions(opts PcapOptions) {
+	l.PcapOptions = opts
+}
+
+// Listen listens for packets from the handles, and call handler on every packet received
+// until the context done signal is sent or there is unrecoverable error on all handles.
+// this function must be called after activating pcap handles
+func (l *Listener) Listen(ctx context.Context, handler PacketHandler) (err error) {
+	l.read(handler)
+	done := ctx.Done()
+	select {
+	case <-done:
+		close(l.quit) // signal close on all handles
+		<-l.closeDone // wait all handles to be closed
+		err = ctx.Err()
+	case <-l.closeDone: // all handles closed voluntarily
+	}
+	return
+}
+
+// ListenBackground is like listen but can run concurrently and signal error through channel
+func (l *Listener) ListenBackground(ctx context.Context, handler PacketHandler) chan error {
+	err := make(chan error, 1)
+	go func() {
+		defer close(err)
+		if e := l.Listen(ctx, handler); err != nil {
+			err <- e
+		}
+	}()
+	return err
+}
+
+// Filter returns automatic filter applied by goreplay
+// to a pcap handle of a specific interface
+func (l *Listener) Filter(ifi net.Interface) (filter string) {
+	// https://www.tcpdump.org/manpages/pcap-filter.7.html
+
+	port := fmt.Sprintf("portrange 0-%d", 1<<16-1)
+	if l.port != 0 {
+		port = fmt.Sprintf("port %d", l.port)
+	}
+	filter = fmt.Sprintf("%s dst %s", l.Transport, port)
+	if l.trackResponse {
+		filter = fmt.Sprintf("%s %s", l.Transport, port)
+	}
+
+	if listenAll(l.host) || isDevice(l.host, ifi) {
+		return "(" + filter + ")"
+	}
+	filter = fmt.Sprintf("(host %s and (%s))", l.host, filter)
+
+	log.Println("BPF filter: " + filter)
+	return
+}
+
+// PcapDumpHandler returns a handler to write packet data in PCAP
+// format, See http://wiki.wireshark.org/Development/LibpcapFileFormathandler.
+// if link layer is invalid Ethernet is assumed
+// func PcapDumpHandler(file *os.File, link layers.LinkType) (handler func(packet *tcp.Packet) error, err error) {
+// 	if link.String() == "" {
+// 		link = layers.LinkTypeEthernet
+// 	}
+// 	w := NewWriterNanos(file)
+// 	err = w.WriteFileHeader(64<<10, link)
+// 	if err != nil {
+// 		return nil, err
+// 	}
+// 	return func(packet *tcp.Packet) error {
+// 		return w.WritePacket(*packet.Info, packet.Data)
+// 	}, nil
+// }
+
+// PcapHandle returns new pcap Handle from dev on success.
+// this function should be called after setting all necessary options for this listener
+func (l *Listener) PcapHandle(ifi net.Interface) (handle *pcap.Handle, err error) {
+	var inactive *pcap.InactiveHandle
+	inactive, err = pcap.NewInactiveHandle(ifi.Name)
+	if err != nil {
+		return nil, fmt.Errorf("inactive handle error: %q, interface: %q", err, ifi.Name)
+	}
+	defer inactive.CleanUp()
+	if l.TimestampType != "" {
+		var ts pcap.TimestampSource
+		ts, err = pcap.TimestampSourceFromString(l.TimestampType)
+		err = inactive.SetTimestampSource(ts)
+		if err != nil {
+			return nil, fmt.Errorf("%q: supported timestamps: %q, interface: %q", err, inactive.SupportedTimestamps(), ifi.Name)
+		}
+	}
+	if l.Promiscuous {
+		if err = inactive.SetPromisc(l.Promiscuous); err != nil {
+			return nil, fmt.Errorf("promiscuous mode error: %q, interface: %q", err, ifi.Name)
+		}
+	}
+	if l.Monitor {
+		if err = inactive.SetRFMon(l.Monitor); err != nil && !errors.Is(err, pcap.CannotSetRFMon) {
+			return nil, fmt.Errorf("monitor mode error: %q, interface: %q", err, ifi.Name)
+		}
+	}
+	var snap int
+	if l.Snaplen {
+		snap = 64<<10 + 200
+	} else if ifi.MTU > 0 {
+		snap = ifi.MTU + 200
+	}
+	err = inactive.SetSnapLen(snap)
+	if err != nil {
+		return nil, fmt.Errorf("snapshot length error: %q, interface: %q", err, ifi.Name)
+	}
+	if l.BufferSize > 0 {
+		err = inactive.SetBufferSize(int(l.BufferSize))
+		if err != nil {
+			return nil, fmt.Errorf("handle buffer size error: %q, interface: %q", err, ifi.Name)
+		}
+	}
+	if l.BufferTimeout == 0 {
+		l.BufferTimeout = pcap.BlockForever
+	}
+	err = inactive.SetTimeout(l.BufferTimeout)
+	if err != nil {
+		return nil, fmt.Errorf("handle buffer timeout error: %q, interface: %q", err, ifi.Name)
+	}
+	handle, err = inactive.Activate()
+	if err != nil {
+		return nil, fmt.Errorf("PCAP Activate device error: %q, interface: %q", err, ifi.Name)
+	}
+	if l.BPFFilter != "" {
+		if l.BPFFilter[0] != '(' || l.BPFFilter[len(l.BPFFilter)-1] != ')' {
+			l.BPFFilter = "(" + l.BPFFilter + ")"
+		}
+	} else {
+		l.BPFFilter = l.Filter(ifi)
+	}
+	fmt.Println("Interface:", ifi.Name, ". BPF Filter:", l.BPFFilter)
+	err = handle.SetBPFFilter(l.BPFFilter)
+	if err != nil {
+		handle.Close()
+		return nil, fmt.Errorf("BPF filter error: %q%s, interface: %q", err, l.BPFFilter, ifi.Name)
+	}
+	return
+}
+
+// SocketHandle returns new unix ethernet handle associated with this listener settings
+func (l *Listener) SocketHandle(ifi net.Interface) (handle Socket, err error) {
+	handle, err = NewSocket(ifi)
+	if err != nil {
+		return nil, fmt.Errorf("sock raw error: %q, interface: %q", err, ifi.Name)
+	}
+	if err = handle.SetPromiscuous(l.Promiscuous || l.Monitor); err != nil {
+		return nil, fmt.Errorf("promiscuous mode error: %q, interface: %q", err, ifi.Name)
+	}
+	if l.BPFFilter != "" {
+		if l.BPFFilter[0] != '(' || l.BPFFilter[len(l.BPFFilter)-1] != ')' {
+			l.BPFFilter = "(" + l.BPFFilter + ")"
+		}
+	} else {
+		l.BPFFilter = l.Filter(ifi)
+	}
+	fmt.Println("BPF Filter: ", l.BPFFilter)
+	if err = handle.SetBPFFilter(l.BPFFilter); err != nil {
+		handle.Close()
+		return nil, fmt.Errorf("BPF filter error: %q%s, interface: %q", err, l.BPFFilter, ifi.Name)
+	}
+	handle.SetLoopbackIndex(int32(l.loopIndex))
+	return
+}
+
+func (l *Listener) read(handler PacketHandler) {
+	l.Lock()
+	defer l.Unlock()
+	for key, handle := range l.Handles {
+		go func(key string, hndl gopacket.ZeroCopyPacketDataSource) {
+			defer l.closeHandles(key)
+			linkSize := 14
+			linkType := int(layers.LinkTypeEthernet)
+			if _, ok := hndl.(*pcap.Handle); ok {
+				linkType = int(hndl.(*pcap.Handle).LinkType())
+				linkSize, ok = pcapLinkTypeLength(linkType)
+				if !ok {
+					if os.Getenv("GORDEBUG") != "0" {
+						log.Printf("can not identify link type of an interface '%s'\n", key)
+					}
+					return // can't find the linktype size
+				}
+			}
+
+			ticker := time.NewTicker(time.Second)
+
+			for {
+				select {
+				case <-l.quit:
+					return
+				case <-ticker.C:
+					if l.maxAllowedMem > 0 {
+						usedMemory, _ := memUsage()
+						if int(usedMemory) > l.maxAllowedMem {
+							log.Printf("[WARNING] Using more memory (%vmb) than allowed (%vmb). Enabling throttling for 1 second\n", bToMb(usedMemory), bToMb(uint64(l.maxAllowedMem)))
+							time.Sleep(time.Second)
+						}
+					}
+				default:
+					data, ci, err := hndl.ZeroCopyReadPacketData()
+					if err == nil {
+						pckt, err := tcp.ParsePacket(data, linkType, linkSize, &ci)
+						if err == nil {
+							handler(pckt)
+						}
+						continue
+					}
+					if enext, ok := err.(pcap.NextError); ok && enext == pcap.NextErrorTimeoutExpired {
+						continue
+					}
+					if eno, ok := err.(unix.Errno); ok && eno.Temporary() {
+						continue
+					}
+					if enet, ok := err.(*net.OpError); ok && (enet.Temporary() || enet.Timeout()) {
+						continue
+					}
+					if err == io.EOF || err == io.ErrClosedPipe {
+						log.Printf("stopped reading from %s interface with error %s\n", key, err)
+						return
+					}
+
+					log.Printf("stopped reading from %s interface with error %s\n", key, err)
+					return
+				}
+			}
+		}(key, handle)
+	}
+	close(l.Reading)
+}
+
+func (l *Listener) closeHandles(key string) {
+	l.Lock()
+	defer l.Unlock()
+	if handle, ok := l.Handles[key]; ok {
+		if _, ok = handle.(Socket); ok {
+			handle.(Socket).Close()
+		} else {
+			handle.(*pcap.Handle).Close()
+		}
+		delete(l.Handles, key)
+		if len(l.Handles) == 0 {
+			close(l.closeDone)
+		}
+	}
+}
+
+func (l *Listener) activatePcap() error {
+	var e error
+	var msg string
+	for _, ifi := range l.Interfaces {
+		var handle *pcap.Handle
+		handle, e = l.PcapHandle(ifi)
+		if e != nil {
+			msg += ("\n" + e.Error())
+			continue
+		}
+		l.Handles[ifi.Name] = handle
+	}
+	if len(l.Handles) == 0 {
+		return fmt.Errorf("pcap handles error:%s", msg)
+	}
+	return nil
+}
+
+func (l *Listener) activateRawSocket() error {
+	if runtime.GOOS != "linux" {
+		return fmt.Errorf("sock_raw is not stabilized on OS other than linux")
+	}
+	var msg string
+	var e error
+	for _, ifi := range l.Interfaces {
+		var handle Socket
+		handle, e = l.SocketHandle(ifi)
+		if e != nil {
+			msg += ("\n" + e.Error())
+			continue
+		}
+		l.Handles[ifi.Name] = handle
+	}
+	if len(l.Handles) == 0 {
+		return fmt.Errorf("raw socket handles error:%s", msg)
+	}
+	return nil
+}
+
+func (l *Listener) activatePcapFile() (err error) {
+	var handle *pcap.Handle
+	var e error
+	if handle, e = pcap.OpenOffline(l.host); e != nil {
+		return fmt.Errorf("open pcap file error: %q", e)
+	}
+	if l.BPFFilter != "" {
+		if l.BPFFilter[0] != '(' || l.BPFFilter[len(l.BPFFilter)-1] != ')' {
+			l.BPFFilter = "(" + l.BPFFilter + ")"
+		}
+	} else {
+		addr := l.host
+		l.host = ""
+		l.BPFFilter = l.Filter(net.Interface{})
+		l.host = addr
+	}
+	if e = handle.SetBPFFilter(l.BPFFilter); e != nil {
+		handle.Close()
+		return fmt.Errorf("BPF filter error: %q, filter: %s", e, l.BPFFilter)
+	}
+	l.Handles["pcap_file"] = handle
+	return
+}
+
+func (l *Listener) setInterfaces() (err error) {
+	var ifis []net.Interface
+	ifis, err = net.Interfaces()
+	if err != nil {
+		return
+	}
+	for i := range ifis {
+		if ifis[i].Flags&net.FlagLoopback != 0 {
+			l.loopIndex = ifis[i].Index
+		}
+		if ifis[i].Flags&net.FlagUp == 0 {
+			continue
+		}
+		if isDevice(l.host, ifis[i]) {
+			l.Interfaces = []net.Interface{ifis[i]}
+			return
+		}
+		addrs, e := ifis[i].Addrs()
+		if e != nil {
+			// don't give up on a failure from a single interface
+			continue
+		}
+		for _, addr := range addrs {
+			if cutMask(addr) == l.host {
+				l.Interfaces = []net.Interface{ifis[i]}
+				return
+			}
+		}
+	}
+	l.Interfaces = ifis
+	return
+}
+
+func cutMask(addr net.Addr) string {
+	mask := addr.String()
+	for i, v := range mask {
+		if v == '/' {
+			return mask[:i]
+		}
+	}
+	return mask
+}
+
+func isDevice(addr string, ifi net.Interface) bool {
+	return addr == ifi.Name || addr == fmt.Sprintf("%d", ifi.Index) || (addr != "" && addr == ifi.HardwareAddr.String())
+}
+
+func listenAll(addr string) bool {
+	switch addr {
+	case "", "0.0.0.0", "[::]", "::":
+		return true
+	}
+	return false
+}
+
+func pcapLinkTypeLength(lType int) (int, bool) {
+	switch layers.LinkType(lType) {
+	case layers.LinkTypeEthernet:
+		return 14, true
+	case layers.LinkTypeNull, layers.LinkTypeLoop:
+		return 4, true
+	case layers.LinkTypeRaw, 12, 14:
+		return 0, true
+	case layers.LinkTypeIPv4, layers.LinkTypeIPv6:
+		// (TODO:) look out for IP encapsulation?
+		return 0, true
+	case layers.LinkTypeLinuxSLL:
+		return 16, true
+	case layers.LinkTypeFDDI:
+		return 13, true
+	case 226 /*DLT_IPNET*/ :
+		// https://www.tcpdump.org/linktypes/LINKTYPE_IPNET.html
+		return 24, true
+	default:
+		return 0, false
+	}
+}
+
+func memUsage() (uint64, uint64) {
+	var m runtime.MemStats
+	runtime.ReadMemStats(&m)
+	// fmt.Printf("Current memory usage: ")
+	// // For info on each, see: https://golang.org/pkg/runtime/#MemStats
+	// fmt.Printf("Alloc = %v MiB", bToMb(m.Alloc))
+	// fmt.Printf("\tTotalAlloc = %v MiB", bToMb(m.TotalAlloc))
+	// fmt.Printf("\tSys = %v MiB", bToMb(m.Sys))
+	// fmt.Printf("\tNumGC = %v\n", m.NumGC)
+
+	// fmt.Printf("Total available memory %v MiB\n", bToMb(memory.TotalMemory()))
+	// fmt.Printf("Currently using %.2f %% of memory\n", 100*float64(m.Alloc+m.Sys)/float64(memory.TotalMemory()))
+
+	return m.Alloc + m.Sys, memory.TotalMemory()
+}
+
+func bToMb(b uint64) uint64 {
+	return b / 1024 / 1024
+}

capture/capture_test.go

@@ -0,0 +1,313 @@
+package capture
+
+import (
+	"context"
+	"encoding/binary"
+	"io/ioutil"
+	"net"
+	"os"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/google/gopacket/layers"
+	"github.com/google/gopacket/pcap"
+)
+
+var LoopBack = func() net.Interface {
+	ifis, _ := net.Interfaces()
+	for _, v := range ifis {
+		if v.Flags&net.FlagLoopback != 0 {
+			return v
+		}
+	}
+	return ifis[0]
+}()
+
+func TestSetInterfaces(t *testing.T) {
+	l := &Listener{}
+	l.host = "127.0.0.1"
+	l.setInterfaces()
+	if len(l.Interfaces) != 1 {
+		t.Error("expected a single interface")
+	}
+	l.host = LoopBack.HardwareAddr.String()
+	l.setInterfaces()
+	if l.Interfaces[0].Name != LoopBack.Name && len(l.Interfaces) != 1 {
+		t.Error("interface should be loop back interface")
+	}
+	l.host = ""
+	l.setInterfaces()
+	if len(l.Interfaces) < 1 {
+		t.Error("should get all interfaces")
+	}
+}
+
+func TestBPFFilter(t *testing.T) {
+	l := &Listener{}
+	l.host = "127.0.0.1"
+	l.Transport = "tcp"
+	l.setInterfaces()
+	filter := l.Filter(l.Interfaces[0])
+	if filter != "(tcp dst portrange 0-65535 and host 127.0.0.1)" {
+		t.Error("wrong filter", filter)
+	}
+	l.port = 8000
+	l.trackResponse = true
+	filter = l.Filter(l.Interfaces[0])
+	if filter != "(tcp port 8000 and host 127.0.0.1)" {
+		t.Error("wrong filter")
+	}
+}
+
+func TestPcapDump(t *testing.T) {
+	f, err := ioutil.TempFile("", "pcap_file")
+	if err != nil {
+		t.Error(err)
+	}
+	h, _ := PcapDumpHandler(f, layers.LinkTypeLoop)
+	packets := Packets(1, 5, 5, 4)
+	for i := 0; i < len(packets); i++ {
+		if i == 1 {
+			// change dst port
+			binary.BigEndian.PutUint16(packets[i].TransLayer[2:], 8001)
+		}
+		if i == 4 {
+			packets[i].Info.CaptureLength = 40
+		}
+		h(packets[i])
+	}
+	name := f.Name()
+	f.Close()
+	testPcapDumpEngine(name, t)
+}
+
+func testPcapDumpEngine(f string, t *testing.T) {
+	defer os.Remove(f)
+	l, err := NewListener(f, 8000, "", EnginePcapFile, true)
+	err = l.Activate()
+	if err != nil {
+		t.Errorf("expected error to be nil, got %q", err)
+		return
+	}
+	pckts := 0
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	err = l.Listen(ctx, func(packet *Packet) {
+		if packet.Info.CaptureLength != 57 {
+			t.Errorf("expected packet length to be %d, got %d", 57, packet.Info.CaptureLength)
+		}
+		pckts++
+	})
+
+	if err != nil {
+		t.Errorf("expected error to be nil, got %q", err)
+	}
+	if pckts != 3 {
+		t.Errorf("expected %d packets, got %d packets", 3, pckts)
+	}
+}
+
+func TestPcapHandler(t *testing.T) {
+	l, err := NewListener(LoopBack.Name, 8000, "", EnginePcap, true)
+	if err != nil {
+		t.Errorf("expected error to be nil, got %v", err)
+		return
+	}
+	err = l.Activate()
+	if err != nil {
+		t.Errorf("expected error to be nil, got %v", err)
+		return
+	}
+	defer l.Handles[LoopBack.Name].(*pcap.Handle).Close()
+	if err != nil {
+		t.Errorf("expected error to be nil, got %v", err)
+		return
+	}
+	for i := 0; i < 5; i++ {
+		_, _ = net.Dial("tcp", "127.0.0.1:8000")
+	}
+	sts, _ := l.Handles[LoopBack.Name].(*pcap.Handle).Stats()
+	if sts.PacketsReceived < 5 {
+		t.Errorf("expected >=5 packets got %d", sts.PacketsReceived)
+	}
+}
+
+// func TestSocketHandler(t *testing.T) {
+// 	l, err := NewListener(LoopBack.Name, 8000, "", EngineRawSocket, true)
+// 	err = l.Activate()
+// 	if err != nil {
+// 		return
+// 	}
+// 	defer l.Handles[LoopBack.Name].(*SockRaw).Close()
+// 	if err != nil {
+// 		t.Errorf("expected error to be nil, got %v", err)
+// 		return
+// 	}
+// 	for i := 0; i < 5; i++ {
+// 		_, _ = net.Dial("tcp", "127.0.0.1:8000")
+// 	}
+// 	sts, _ := l.Handles[LoopBack.Name].(*SockRaw).Stats()
+// 	if sts.Packets < 5 {
+// 		t.Errorf("expected >=5 packets got %d", sts.Packets)
+// 	}
+// }
+
+func BenchmarkPcapDump(b *testing.B) {
+	f, err := ioutil.TempFile("", "pcap_file")
+	if err != nil {
+		b.Error(err)
+		return
+	}
+	now := time.Now()
+	defer os.Remove(f.Name())
+	h, _ := PcapDumpHandler(f, layers.LinkTypeLoop)
+	packets := Packets(1, b.N, 5, 4)
+	for i := 0; i < len(packets); i++ {
+		h(packets[i])
+	}
+	f.Close()
+	b.Logf("%d packets in %s", b.N, time.Since(now))
+}
+
+func BenchmarkPcapFile(b *testing.B) {
+	f, err := ioutil.TempFile("", "pcap_file")
+	if err != nil {
+		b.Error(err)
+		return
+	}
+	defer os.Remove(f.Name())
+	h, _ := PcapDumpHandler(f, layers.LinkTypeLoop)
+	packets := Packets(1, b.N, 5, 4)
+	for i := 0; i < len(packets); i++ {
+		h(packets[i])
+	}
+	name := f.Name()
+	f.Close()
+	b.ResetTimer()
+	var l *Listener
+	l, err = NewListener(name, 8000, "", EnginePcapFile, true)
+	if err != nil {
+		b.Error(err)
+		return
+	}
+	err = l.Activate()
+	if err != nil {
+		b.Error(err)
+		return
+	}
+	now := time.Now()
+	pckts := 0
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	if err = l.Listen(ctx, func(packet *Packet) {
+		if packet.Info.CaptureLength != 49 {
+			b.Errorf("expected packet length to be %d, got %d", 49, packet.Info.CaptureLength)
+		}
+		pckts++
+	}); err != nil {
+		b.Error(err)
+	}
+	b.Logf("%d/%d packets in %s", pckts, b.N, time.Since(now))
+}
+
+// used to benchmark sock engine
+var buf [1024]byte
+
+func init() {
+	for i := 0; i < len(buf); i++ {
+		buf[i] = 0xff
+	}
+}
+
+func handler(n, counter *int32) PacketHandler {
+	return func(p *Packet) {
+		nn := int32(len(p.Data))
+		atomic.AddInt32(n, nn)
+		atomic.AddInt32(counter, 1)
+	}
+}
+
+func BenchmarkPcap(b *testing.B) {
+	var err error
+	n := new(int32)
+	counter := new(int32)
+	l, err := NewListener(LoopBack.Name, 8000, "", EnginePcap, false)
+	if err != nil {
+		b.Error(err)
+		return
+	}
+	l.PcapOptions.BPFFilter = "udp dst port 8000 and host 127.0.0.1"
+	err = l.Activate()
+	if err != nil {
+		b.Error(err)
+		return
+	}
+	errCh := l.ListenBackground(context.Background(), handler(n, counter))
+	select {
+	case <-l.Reading:
+	case err = <-errCh:
+		b.Error(err)
+		return
+	}
+	var conn net.Conn
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		b.StopTimer()
+		conn, err = net.Dial("udp", "127.0.0.1:8000")
+		if err != nil {
+			b.Error(err)
+			return
+		}
+		b.StartTimer()
+		_, err = conn.Write(buf[:])
+		if err != nil {
+			b.Error(err)
+			return
+		}
+	}
+	b.ReportMetric(float64(atomic.LoadInt32(n)), "buf")
+	b.ReportMetric(float64(atomic.LoadInt32(counter)), "packets")
+}
+
+func BenchmarkRawSocket(b *testing.B) {
+	var err error
+	n := new(int32)
+	counter := new(int32)
+	l, err := NewListener(LoopBack.Name, 8000, "", EngineRawSocket, false)
+	if err != nil {
+		b.Error(err)
+		return
+	}
+	l.PcapOptions.BPFFilter = "udp dst port 8000 and host 127.0.0.1"
+	err = l.Activate()
+	if err != nil {
+		b.Error(err)
+		return
+	}
+	errCh := l.ListenBackground(context.Background(), handler(n, counter))
+	select {
+	case <-l.Reading:
+	case err = <-errCh:
+		b.Error(err)
+		return
+	}
+	var conn net.Conn
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		b.StopTimer()
+		conn, err = net.Dial("udp", "127.0.0.1:8000")
+		if err != nil {
+			b.Error(err)
+			return
+		}
+		b.StartTimer()
+		_, err = conn.Write(buf[:])
+		if err != nil {
+			b.Error(err)
+			return
+		}
+	}
+	b.ReportMetric(float64(atomic.LoadInt32(n)), "buf")
+	b.ReportMetric(float64(atomic.LoadInt32(counter)), "packets")
+}

capture/doc.go

@@ -0,0 +1,35 @@
+/*
+Package capture provides traffic sniffier using AF_PACKET, pcap or pcap file.
+it allows you to listen for traffic from any port (e.g. sniffing) because they operate on IP level.
+Ports is TCP/IP feature, same as flow control, reliable transmission and etc.
+Currently this package implements TCP layer: flow control is managed under tcp package.
+BPF filters can also be applied.
+
+example:
+
+// for the transport should be "tcp"
+listener, err := capture.NewListener(host, port, transport, engine, trackResponse)
+if err != nil {
+	// handle error
+}
+listener.SetPcapOptions(opts)
+err = listner.Activate()
+if err != nil {
+	// handle it
+}
+
+if err := listener.Listen(context.Background(), handler); err != nil {
+	 // handle error
+}
+// or
+errCh := listener.ListenBackground(context.Background(), handler) // runs in the backgorund
+select {
+case err := <- errCh:
+	// handle error
+case <-quit:
+	//
+case <- l.Reading: // if we have started reading
+}
+
+*/
+package capture // import github.com/buger/goreplay/capture

capture/dump.go

@@ -0,0 +1,126 @@
+// https://github.com/google/gopacket/blob/403ca653c4/pcapgo/read.go
+
+package capture
+
+import (
+	"encoding/binary"
+	"fmt"
+	"io"
+	"time"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+)
+
+// Writer wraps an underlying io.Writer to write packet data in PCAP
+// format.  See http://wiki.wireshark.org/Development/LibpcapFileFormat
+// for information on the file format.
+//
+// For those that care, we currently write v2.4 files with nanosecond
+// or microsecond timestamp resolution and little-endian encoding.
+type Writer struct {
+	w        io.Writer
+	tsScaler int
+	// Moving this into the struct seems to save an allocation for each call to writePacketHeader
+	buf [16]byte
+}
+
+const magicNanoseconds = 0xA1B23C4D
+const magicMicroseconds = 0xA1B2C3D4
+const versionMajor = 2
+const versionMinor = 4
+
+// NewWriterNanos returns a new writer object, for writing packet data out
+// to the given writer.  If this is a new empty writer (as opposed to
+// an append), you must call WriteFileHeader before WritePacket.  Packet
+// timestamps are written with nanosecond precision.
+//
+//  // Write a new file:
+//  f, _ := os.Create("/tmp/file.pcap")
+//  w := pcapgo.NewWriterNanos(f)
+//  w.WriteFileHeader(65536, layers.LinkTypeEthernet)  // new file, must do this.
+//  w.WritePacket(gopacket.CaptureInfo{...}, data1)
+//  f.Close()
+//  // Append to existing file (must have same snaplen and linktype)
+//  f2, _ := os.OpenFile("/tmp/fileNano.pcap", os.O_APPEND, 0700)
+//  w2 := pcapgo.NewWriter(f2)
+//  // no need for file header, it's already written.
+//  w2.WritePacket(gopacket.CaptureInfo{...}, data2)
+//  f2.Close()
+func NewWriterNanos(w io.Writer) *Writer {
+	return &Writer{w: w, tsScaler: nanosPerNano}
+}
+
+// NewWriter returns a new writer object, for writing packet data out
+// to the given writer.  If this is a new empty writer (as opposed to
+// an append), you must call WriteFileHeader before WritePacket.
+// Packet timestamps are written witn microsecond precision.
+//
+//  // Write a new file:
+//  f, _ := os.Create("/tmp/file.pcap")
+//  w := pcapgo.NewWriter(f)
+//  w.WriteFileHeader(65536, layers.LinkTypeEthernet)  // new file, must do this.
+//  w.WritePacket(gopacket.CaptureInfo{...}, data1)
+//  f.Close()
+//  // Append to existing file (must have same snaplen and linktype)
+//  f2, _ := os.OpenFile("/tmp/file.pcap", os.O_APPEND, 0700)
+//  w2 := pcapgo.NewWriter(f2)
+//  // no need for file header, it's already written.
+//  w2.WritePacket(gopacket.CaptureInfo{...}, data2)
+//  f2.Close()
+func NewWriter(w io.Writer) *Writer {
+	return &Writer{w: w, tsScaler: nanosPerMicro}
+}
+
+// WriteFileHeader writes a file header out to the writer.
+// This must be called exactly once per output.
+func (w *Writer) WriteFileHeader(snaplen uint32, linktype layers.LinkType) error {
+	var buf [24]byte
+	if w.tsScaler == nanosPerMicro {
+		binary.LittleEndian.PutUint32(buf[0:4], magicMicroseconds)
+	} else {
+		binary.LittleEndian.PutUint32(buf[0:4], magicNanoseconds)
+	}
+	binary.LittleEndian.PutUint16(buf[4:6], versionMajor)
+	binary.LittleEndian.PutUint16(buf[6:8], versionMinor)
+	// bytes 8:12 stay 0 (timezone = UTC)
+	// bytes 12:16 stay 0 (sigfigs is always set to zero, according to
+	//   http://wiki.wireshark.org/Development/LibpcapFileFormat
+	binary.LittleEndian.PutUint32(buf[16:20], snaplen)
+	binary.LittleEndian.PutUint32(buf[20:24], uint32(linktype))
+	_, err := w.w.Write(buf[:])
+	return err
+}
+
+const nanosPerMicro = 1000
+const nanosPerNano = 1
+
+func (w *Writer) writePacketHeader(ci gopacket.CaptureInfo) error {
+	t := ci.Timestamp
+	if t.IsZero() {
+		t = time.Now()
+	}
+	secs := t.Unix()
+	usecs := t.Nanosecond() / w.tsScaler
+	binary.LittleEndian.PutUint32(w.buf[0:4], uint32(secs))
+	binary.LittleEndian.PutUint32(w.buf[4:8], uint32(usecs))
+	binary.LittleEndian.PutUint32(w.buf[8:12], uint32(ci.CaptureLength))
+	binary.LittleEndian.PutUint32(w.buf[12:16], uint32(ci.Length))
+	_, err := w.w.Write(w.buf[:])
+	return err
+}
+
+// WritePacket writes the given packet data out to the file.
+func (w *Writer) WritePacket(ci gopacket.CaptureInfo, data []byte) error {
+	if ci.CaptureLength != len(data) {
+		return fmt.Errorf("capture length %d does not match data length %d", ci.CaptureLength, len(data))
+	}
+	if ci.CaptureLength > ci.Length {
+		return fmt.Errorf("invalid capture info %+v:  capture length > length", ci)
+	}
+	if err := w.writePacketHeader(ci); err != nil {
+		return fmt.Errorf("error writing packet header: %v", err)
+	}
+	_, err := w.w.Write(data)
+	return err
+}

capture/listener.go

@@ -1,904 +0,0 @@
-/*
-Package capture provides traffic sniffier using RAW sockets.
-Capture traffic from socket using RAW_SOCKET's http://en.wikipedia.org/wiki/Raw_socket
-RAW_SOCKET allows you to listen for traffic from any port (e.g. sniffing) because they operate on IP level.
-Ports is TCP feature, same as flow control, reliable transmission and etc.
-This package implements own TCP layer: TCP packets is parsed using tcp_packet.go, and flow control is managed by tcp_message.go
-*/
-package capture
-
-import (
-	"bytes"
-	"encoding/binary"
-	"fmt"
-	"io"
-	"log"
-	"net"
-	"runtime"
-	"runtime/debug"
-	"strconv"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/buger/goreplay/proto"
-
-	"github.com/google/gopacket"
-	"github.com/google/gopacket/layers"
-	"github.com/google/gopacket/pcap"
-)
-
-type packet struct {
-	srcIP     []byte
-	data      []byte
-	timestamp time.Time
-}
-
-// Listener handle traffic capture
-type Listener struct {
-	sync.Mutex
-	// buffer of TCPMessages waiting to be send
-	// ID -> TCPMessage
-	messages map[tcpID]*TCPMessage
-
-	// Expect: 100-continue request is send in 2 tcp messages
-	// We store ACK aliases to merge this packets together
-	ackAliases map[uint32]uint32
-	// To get ACK of second message we need to compute its Seq and wait for them message
-	seqWithData map[uint32]uint32
-
-	// Ack -> Req
-	respAliases map[uint32]*TCPMessage
-
-	// Ack -> ID
-	respWithoutReq map[uint32]tcpID
-
-	// Messages ready to be send to client
-	packetsChan chan *packet
-
-	// Messages ready to be send to client
-	messagesChan chan *TCPMessage
-
-	addr string // IP to listen
-	port uint16 // Port to listen
-
-	trackResponse bool
-	messageExpire time.Duration
-
-	bpfFilter       string
-	timestampType   string
-	overrideSnapLen bool
-	immediateMode   bool
-
-	bufferSize int64
-
-	conn        net.PacketConn
-	pcapHandles []*pcap.Handle
-
-	quit  chan bool
-	ready bool
-
-	protocol TCPProtocol
-}
-
-type request struct {
-	id    tcpID
-	start time.Time
-	ack   uint32
-}
-
-// Available engines for intercepting traffic
-const (
-	EngineRawSocket = 1 << iota
-	EnginePcap
-	EnginePcapFile
-)
-
-// NewListener creates and initializes new Listener object
-func NewListener(addr string, port string, engine int, trackResponse bool, expire time.Duration, protocol TCPProtocol, bpfFilter string, timestampType string, bufferSize int64, overrideSnapLen bool, immediateMode bool) (l *Listener) {
-	l = &Listener{}
-
-	l.packetsChan = make(chan *packet, 10000)
-	l.messagesChan = make(chan *TCPMessage, 10000)
-	l.quit = make(chan bool)
-
-	l.messages = make(map[tcpID]*TCPMessage)
-	l.ackAliases = make(map[uint32]uint32)
-	l.seqWithData = make(map[uint32]uint32)
-	l.respAliases = make(map[uint32]*TCPMessage)
-	l.respWithoutReq = make(map[uint32]tcpID)
-	l.trackResponse = trackResponse
-	l.protocol = protocol
-	l.bpfFilter = bpfFilter
-	l.timestampType = timestampType
-	l.immediateMode = immediateMode
-	l.bufferSize = bufferSize
-	l.overrideSnapLen = overrideSnapLen
-
-	l.addr = addr
-	_port, _ := strconv.Atoi(port)
-	l.port = uint16(_port)
-
-	if expire.Nanoseconds() == 0 {
-		expire = 2000 * time.Millisecond
-	}
-
-	l.messageExpire = expire
-
-	go l.listen()
-
-	// Special case for testing
-	if l.port != 0 {
-		switch engine {
-		case EnginePcap:
-			go l.readPcap()
-		case EnginePcapFile:
-			go l.readPcapFile()
-		case EngineRawSocket:
-			go l.readRAWSocket()
-		default:
-			log.Fatal("Unknown traffic interception engine:", engine)
-		}
-	}
-
-	return
-}
-
-func (t *Listener) listen() {
-	gcTicker := time.Tick(t.messageExpire / 2)
-
-	for {
-		select {
-		case <-t.quit:
-			if t.conn != nil {
-				t.conn.Close()
-			}
-			return
-		case packet := <-t.packetsChan:
-			tcpPacket := ParseTCPPacket(packet.srcIP, packet.data, packet.timestamp)
-			t.processTCPPacket(tcpPacket)
-		case <-gcTicker:
-			now := time.Now()
-
-			// Dispatch requests before responses
-			for _, message := range t.messages {
-				if now.Sub(message.End) >= t.messageExpire {
-					t.dispatchMessage(message)
-				}
-			}
-		}
-	}
-}
-
-func (t *Listener) deleteMessage(message *TCPMessage) {
-	delete(t.messages, message.ID())
-	delete(t.ackAliases, message.Ack)
-	if message.DataAck != 0 {
-		delete(t.ackAliases, message.DataAck)
-	}
-	if message.DataSeq != 0 {
-		delete(t.seqWithData, message.DataSeq)
-	}
-
-	delete(t.respAliases, message.ResponseAck)
-}
-
-func (t *Listener) dispatchMessage(message *TCPMessage) {
-	// If already dispatched
-	if _, ok := t.messages[message.ID()]; !ok {
-		return
-	}
-
-	t.deleteMessage(message)
-
-	if t.protocol == ProtocolHTTP && !message.complete {
-		if !message.IsIncoming {
-			delete(t.respAliases, message.Ack)
-			delete(t.respWithoutReq, message.Ack)
-		}
-
-		return
-	}
-
-	if message.IsIncoming {
-		// If there were response before request
-		// log.Println("Looking for Response: ", t.respWithoutReq, message.ResponseAck)
-		if t.trackResponse {
-			if respID, ok := t.respWithoutReq[message.ResponseAck]; ok {
-				if resp, rok := t.messages[respID]; rok {
-					// if resp.AssocMessage == nil {
-					// log.Println("FOUND RESPONSE")
-					resp.setAssocMessage(message)
-					message.setAssocMessage(resp)
-
-					if resp.complete {
-						defer t.dispatchMessage(resp)
-					}
-					// }
-				}
-			}
-
-			if resp, ok := t.messages[message.ResponseID]; ok {
-				resp.setAssocMessage(message)
-			}
-		}
-	} else {
-		if message.AssocMessage == nil {
-			if responseRequest, ok := t.respAliases[message.Ack]; ok {
-				message.setAssocMessage(responseRequest)
-				responseRequest.setAssocMessage(message)
-			}
-		}
-
-		delete(t.respAliases, message.Ack)
-		delete(t.respWithoutReq, message.Ack)
-
-		// Do not track responses which have no associated requests
-		if message.AssocMessage == nil {
-			// log.Println("Can't dispatch resp", message.Seq, message.Ack, string(message.Bytes()))
-			return
-		}
-	}
-
-	t.messagesChan <- message
-}
-
-// DeviceNotFoundError raised if user specified wrong ip
-type DeviceNotFoundError struct {
-	addr string
-}
-
-func (e *DeviceNotFoundError) Error() string {
-	devices, _ := pcap.FindAllDevs()
-
-	if len(devices) == 0 {
-		return "Can't get list of network interfaces, ensure that you running Gor as root user or sudo.\nTo run as non-root users see this docs https://github.com/buger/goreplay/wiki/Running-as-non-root-user"
-	}
-
-	var msg string
-	msg += "Can't find interfaces with addr: " + e.addr + ". Provide available IP for intercepting traffic: \n"
-	for _, device := range devices {
-		msg += "Name: " + device.Name + "\n"
-		if device.Description != "" {
-			msg += "Description: " + device.Description + "\n"
-		}
-		for _, address := range device.Addresses {
-			msg += "- IP address: " + address.IP.String() + "\n"
-		}
-	}
-
-	return msg
-}
-
-func isLoopback(device pcap.Interface) bool {
-	if len(device.Addresses) == 0 {
-		return false
-	}
-
-	switch device.Addresses[0].IP.String() {
-	case "127.0.0.1", "::1":
-		return true
-	}
-
-	return false
-}
-
-func listenAllInterfaces(addr string) bool {
-	switch addr {
-	case "", "0.0.0.0", "[::]", "::":
-		return true
-	default:
-		return false
-	}
-}
-
-func findPcapDevices(addr string) (interfaces []pcap.Interface, err error) {
-	devices, err := pcap.FindAllDevs()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	for _, device := range devices {
-		if listenAllInterfaces(addr) && len(device.Addresses) > 0 || isLoopback(device) {
-			interfaces = append(interfaces, device)
-			continue
-		}
-
-		for _, address := range device.Addresses {
-			if device.Name == addr || address.IP.String() == addr {
-				interfaces = append(interfaces, device)
-				return interfaces, nil
-			}
-		}
-	}
-
-	if len(interfaces) == 0 {
-		return nil, &DeviceNotFoundError{addr}
-	}
-
-	return interfaces, nil
-}
-
-func (t *Listener) readPcap() {
-	devices, err := findPcapDevices(t.addr)
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	const BPFSupported = runtime.GOOS != "darwin"
-
-	var wg sync.WaitGroup
-	wg.Add(len(devices))
-
-	for _, d := range devices {
-		go func(device pcap.Interface) {
-			inactive, err := pcap.NewInactiveHandle(device.Name)
-			if err != nil {
-				inactive.CleanUp()
-				log.Println("Pcap Error while opening device", device.Name, err)
-				wg.Done()
-				return
-			}
-
-			if t.timestampType != "" {
-				if tt, terr := pcap.TimestampSourceFromString(t.timestampType); terr != nil {
-					log.Println("Supported timestamp types: ", inactive.SupportedTimestamps(), device.Name)
-				} else if terr := inactive.SetTimestampSource(tt); terr != nil {
-					log.Println("Supported timestamp types: ", inactive.SupportedTimestamps(), device.Name)
-				}
-			}
-
-			if it, err := net.InterfaceByName(device.Name); err == nil && !t.overrideSnapLen {
-				// Auto-guess max length of packet to capture
-				inactive.SetSnapLen(it.MTU + 68*2)
-			} else {
-				inactive.SetSnapLen(65536)
-			}
-			inactive.SetTimeout(t.messageExpire)
-			inactive.SetPromisc(true)
-			inactive.SetImmediateMode(t.immediateMode)
-			if t.immediateMode {
-				log.Println("Setting immediate mode")
-			}
-			if t.bufferSize > 0 {
-				inactive.SetBufferSize(int(t.bufferSize))
-			}
-
-			handle, herr := inactive.Activate()
-			if herr != nil {
-				log.Printf("PCAP Activate device '%s' error: %s\n", device.Name, herr)
-				wg.Done()
-				return
-			}
-
-			defer handle.Close()
-
-			t.Lock()
-			t.pcapHandles = append(t.pcapHandles, handle)
-
-			var bpfDstHost, bpfSrcHost string
-			var loopback = isLoopback(device)
-
-			if loopback {
-				var allAddr []string
-				for _, dc := range devices {
-					for _, addr := range dc.Addresses {
-						allAddr = append(allAddr, "(dst host "+addr.IP.String()+" and src host "+addr.IP.String()+")")
-					}
-				}
-
-				bpfDstHost = strings.Join(allAddr, " or ")
-				bpfSrcHost = bpfDstHost
-			} else {
-				for i, addr := range device.Addresses {
-					bpfDstHost += "dst host " + addr.IP.String()
-					bpfSrcHost += "src host " + addr.IP.String()
-					if i != len(device.Addresses)-1 {
-						bpfDstHost += " or "
-						bpfSrcHost += " or "
-					}
-				}
-			}
-
-			if BPFSupported {
-				var bpf string
-
-				if t.bpfFilter != "" {
-					bpf = t.bpfFilter
-				} else {
-					if t.trackResponse {
-						bpf = fmt.Sprintf("(tcp dst port %d and (%s)) or (tcp src port %d and (%s))", t.port, bpfDstHost, t.port, bpfSrcHost)
-					} else {
-						bpf = fmt.Sprintf("(tcp dst port %d and (%s))", t.port, bpfDstHost)
-					}
-				}
-
-				if err := handle.SetBPFFilter(bpf); err != nil {
-					log.Println("BPF filter error:", err, "Device:", device.Name, bpf)
-					wg.Done()
-					return
-				}
-			}
-			t.Unlock()
-
-			var decoder gopacket.Decoder
-
-			// Special case for tunnel interface https://github.com/google/gopacket/issues/99
-			if handle.LinkType() == 12 {
-				decoder = layers.LayerTypeIPv4
-			} else {
-				decoder = handle.LinkType()
-			}
-
-			source := gopacket.NewPacketSource(handle, decoder)
-			source.Lazy = true
-			source.NoCopy = true
-
-			wg.Done()
-
-			var data, srcIP, dstIP []byte
-
-			for {
-				packet, err := source.NextPacket()
-
-				if err == io.EOF {
-					break
-				} else if err != nil {
-					continue
-				}
-
-				// We should remove network layer before parsing TCP/IP data
-				var of int
-				switch decoder {
-				case layers.LinkTypeEthernet:
-					of = 14
-				case layers.LinkTypePPP:
-					of = 1
-				case layers.LinkTypeFDDI:
-					of = 13
-				case layers.LinkTypeNull:
-					of = 4
-				case layers.LinkTypeLoop:
-					of = 4
-				case layers.LinkTypeRaw, layers.LayerTypeIPv4:
-					of = 0
-				case layers.LinkTypeLinuxSLL:
-					of = 16
-				default:
-					log.Println("Unknown packet layer", decoder, packet)
-					break
-				}
-				data = packet.Data()[of:]
-
-				version := uint8(data[0]) >> 4
-				ipLength := int(binary.BigEndian.Uint16(data[2:4]))
-
-				if version == 4 {
-					ihl := uint8(data[0]) & 0x0F
-
-					// Truncated IP info
-					if len(data) < int(ihl*4) {
-						continue
-					}
-
-					srcIP = data[12:16]
-					dstIP = data[16:20]
-
-					// Too small IP packet
-					if ipLength < 20 {
-						continue
-					}
-
-					// Invalid length
-					if int(ihl*4) > ipLength {
-						continue
-					}
-
-					if cmp := len(data) - ipLength; cmp > 0 {
-						data = data[:ipLength]
-					} else if cmp < 0 {
-						// Truncated packet
-						continue
-					}
-
-					data = data[ihl*4:]
-				} else {
-					// Truncated IP info
-					if len(data) < 40 {
-						continue
-					}
-
-					srcIP = data[8:24]
-					dstIP = data[24:40]
-
-					data = data[40:]
-				}
-
-				// Truncated TCP info
-				if len(data) <= 13 {
-					continue
-				}
-
-				dataOffset := data[12] >> 4
-				isFIN := data[13]&0x01 != 0
-
-				// We need only packets with data inside
-				// Check that the buffer is larger than the size of the TCP header
-				if len(data) > int(dataOffset*4) || isFIN {
-					if !BPFSupported {
-						destPort := binary.BigEndian.Uint16(data[2:4])
-						srcPort := binary.BigEndian.Uint16(data[0:2])
-
-						var addrCheck []byte
-
-						if destPort == t.port {
-							addrCheck = dstIP
-						}
-
-						if t.trackResponse && srcPort == t.port {
-							addrCheck = srcIP
-						}
-
-						if len(addrCheck) == 0 {
-							continue
-						}
-
-						addrMatched := false
-
-						if loopback {
-							for _, dc := range devices {
-								if addrMatched {
-									break
-								}
-								for _, a := range dc.Addresses {
-									if a.IP.Equal(net.IP(addrCheck)) {
-										addrMatched = true
-										break
-									}
-								}
-							}
-							addrMatched = true
-						} else {
-							for _, a := range device.Addresses {
-								if a.IP.Equal(net.IP(addrCheck)) {
-									addrMatched = true
-									break
-								}
-							}
-						}
-
-						if !addrMatched {
-							continue
-						}
-					}
-
-					t.packetsChan <- t.buildPacket(srcIP, data, packet.Metadata().Timestamp)
-				}
-			}
-		}(d)
-	}
-
-	wg.Wait()
-	t.Lock()
-	t.ready = true
-	t.Unlock()
-}
-
-func (t *Listener) readPcapFile() {
-	if handle, err := pcap.OpenOffline(t.addr); err != nil {
-		log.Fatal(err)
-	} else {
-		if t.bpfFilter != "" {
-			if err := handle.SetBPFFilter(t.bpfFilter); err != nil {
-				log.Println("BPF filter error:", err)
-				return
-			}
-		}
-
-		t.Lock()
-		t.ready = true
-		t.Unlock()
-		packetSource := gopacket.NewPacketSource(handle, handle.LinkType())
-
-		for {
-			packet, err := packetSource.NextPacket()
-			if err == io.EOF {
-				break
-			} else if err != nil {
-				log.Println("Error:", err)
-				continue
-			}
-
-			var addr, data []byte
-
-			if tcpLayer := packet.Layer(layers.LayerTypeTCP); tcpLayer != nil {
-				tcp, _ := tcpLayer.(*layers.TCP)
-				data = append(tcp.LayerContents(), tcp.LayerPayload()...)
-
-				if uint16(tcp.DstPort) == t.port {
-					copy(data[0:2], []byte{byte(tcp.SrcPort >> 8), byte(tcp.SrcPort)})
-					copy(data[2:4], []byte{byte(tcp.DstPort >> 8), byte(tcp.DstPort)})
-				} else {
-					copy(data[0:2], []byte{byte(tcp.DstPort >> 8), byte(tcp.DstPort)})
-					copy(data[2:4], []byte{byte(tcp.SrcPort >> 8), byte(tcp.SrcPort)})
-				}
-			} else {
-				continue
-			}
-
-			if ipLayer := packet.Layer(layers.LayerTypeIPv4); ipLayer != nil {
-				ip, _ := ipLayer.(*layers.IPv4)
-				addr = ip.SrcIP
-			} else if ipLayer = packet.Layer(layers.LayerTypeIPv6); ipLayer != nil {
-				ip, _ := ipLayer.(*layers.IPv6)
-				addr = ip.SrcIP
-			} else {
-				// log.Println("Can't find IP layer", packet)
-				continue
-			}
-
-			dataOffset := data[12] >> 4
-			isFIN := data[13]&0x01 != 0
-
-			// We need only packets with data inside
-			// Check that the buffer is larger than the size of the TCP header
-			if len(data) <= int(dataOffset*4) && !isFIN {
-				continue
-			}
-
-			t.packetsChan <- t.buildPacket(addr, data, packet.Metadata().Timestamp)
-		}
-	}
-}
-
-func (t *Listener) readRAWSocket() {
-	conn, e := net.ListenPacket("ip:tcp", t.addr)
-	t.conn = conn
-	if e != nil {
-		log.Fatal(e)
-	}
-	defer t.conn.Close()
-	type RSPacket struct {
-		buf  []byte
-		addr net.Addr
-		err  error
-		n    int
-	}
-	var bufChan = make(chan *RSPacket, 1000)
-	t.Lock()
-	t.ready = true
-	t.Unlock()
-	go func() {
-		for {
-			// Re-allocate data object to avoid data collision
-			var buf [64 * 104 * 1024]byte
-			// Note: ReadFrom receive messages without IP header
-			n, addr, err := t.conn.ReadFrom(buf[:])
-			bufChan <- &RSPacket{buf[:], addr, err, n}
-		}
-	}()
-	for {
-		packet := <-bufChan
-		if packet.err != nil {
-			if strings.HasSuffix(packet.err.Error(), "closed network connection") {
-				return
-			}
-			continue
-		}
-
-		if packet.n > 0 {
-			if t.isValidPacket(packet.buf[:packet.n]) {
-				t.packetsChan <- t.buildPacket([]byte(packet.addr.(*net.IPAddr).IP), packet.buf[:packet.n], time.Now())
-			}
-		}
-	}
-}
-
-func (t *Listener) buildPacket(packetSrcIP []byte, packetData []byte, timestamp time.Time) *packet {
-	return &packet{
-		srcIP:     packetSrcIP,
-		data:      packetData,
-		timestamp: timestamp,
-	}
-}
-
-func (t *Listener) isValidPacket(buf []byte) bool {
-	// To avoid full packet parsing every time, we manually parsing values needed for packet filtering
-	// http://en.wikipedia.org/wiki/Transmission_Control_Protocol
-	destPort := binary.BigEndian.Uint16(buf[2:4])
-	srcPort := binary.BigEndian.Uint16(buf[0:2])
-	// Because RAW_SOCKET can't be bound to port, we have to control it by ourself
-	if destPort == t.port || (t.trackResponse && srcPort == t.port) {
-		// Get the 'data offset' (size of the TCP header in 32-bit words)
-		dataOffset := buf[12] >> 4
-		// We need only packets with data inside
-		// Check that the buffer is larger than the size of the TCP header
-		if len(buf) > int(dataOffset*4) {
-			return true
-		}
-	}
-
-	return false
-}
-
-// Trying to add packet to existing message or creating new message
-//
-// For TCP message unique id is Acknowledgment number (see tcp_packet.go)
-func (t *Listener) processTCPPacket(packet *TCPPacket) {
-	// Don't exit on panic
-	defer func() {
-		if r := recover(); r != nil {
-			log.Println("PANIC: pkg:", r, packet, string(debug.Stack()))
-		}
-	}()
-
-	var responseRequest *TCPMessage
-	var message *TCPMessage
-
-	isIncoming := packet.DestPort == t.port
-
-	if t.protocol == ProtocolHTTP {
-		if !isIncoming {
-			responseRequest, _ = t.respAliases[packet.Ack]
-		}
-
-		// Seek for 100-expect chunks
-		// `packet.Ack != parentAck` is protection for clients who send data without ignoring server 100-continue response, e.g have data chunks have same Ack
-		if parentAck, ok := t.seqWithData[packet.Seq]; ok && packet.Ack != parentAck {
-			// Skip zero-length chunks https://github.com/buger/goreplay/issues/496
-			if len(packet.Data) == 0 {
-				return
-			}
-
-			// In case if non-first data chunks comes first
-			for _, m := range t.messages {
-				if m.Ack == packet.Ack && bytes.Equal(m.packets[0].Addr, packet.Addr) {
-					t.deleteMessage(m)
-
-					if m.AssocMessage != nil {
-						m.AssocMessage.setAssocMessage(nil)
-						m.setAssocMessage(nil)
-					}
-					for _, pkt := range m.packets {
-						// log.Println("Updating ack", parentAck, pkt.Ack)
-						pkt.UpdateAck(parentAck)
-						// Re-queue this packets
-						t.processTCPPacket(pkt)
-					}
-				}
-			}
-
-			t.ackAliases[packet.Ack] = parentAck
-			packet.UpdateAck(parentAck)
-		}
-	}
-
-	if isIncoming && packet.IsFIN {
-		if ma, ok := t.respAliases[packet.Seq]; ok {
-			if ma.packets[0].SrcPort == packet.SrcPort {
-				packet.UpdateAck(ma.Ack)
-			}
-		}
-	}
-
-	if alias, ok := t.ackAliases[packet.Ack]; ok {
-		packet.UpdateAck(alias)
-	}
-
-	message, ok := t.messages[packet.ID]
-
-	if !ok {
-		message = NewTCPMessage(packet.Seq, packet.Ack, isIncoming, t.protocol, packet.timestamp)
-		t.messages[packet.ID] = message
-
-		if !isIncoming {
-			if responseRequest != nil {
-				message.setAssocMessage(responseRequest)
-				responseRequest.setAssocMessage(message)
-			} else {
-				t.respWithoutReq[packet.Ack] = packet.ID
-			}
-		}
-	}
-
-	// Adding packet to message
-	message.AddPacket(packet)
-
-	// Handling Expect: 100-continue requests
-	if t.protocol == ProtocolHTTP && message.expectType == httpExpect100Continue && len(message.packets) == message.headerPacket+1 {
-		seq := packet.Seq + uint32(len(packet.Data))
-		t.seqWithData[seq] = packet.Ack
-
-		message.DataSeq = seq
-		message.complete = false
-
-		// In case if sequence packet came first
-		for _, m := range t.messages {
-			if m.Seq == seq {
-				t.deleteMessage(m)
-				if m.AssocMessage != nil {
-					message.setAssocMessage(m.AssocMessage)
-					m.AssocMessage.setAssocMessage(nil)
-				}
-
-				t.ackAliases[m.Ack] = packet.Ack
-
-				for _, pkt := range m.packets {
-					pkt.UpdateAck(packet.Ack)
-					message.AddPacket(pkt)
-				}
-			}
-		}
-
-		// Removing `Expect: 100-continue` header
-		packet.Data = proto.DeleteHeader(packet.Data, bExpectHeader)
-	}
-
-	// If client do sends Expect: 100-continue but do not respect server response
-	if message.expectType == httpExpect100Continue && (message.headerPacket != -1 && len(message.packets) > message.headerPacket+1) {
-		delete(t.seqWithData, message.DataSeq)
-		seq := packet.Seq + uint32(len(packet.Data))
-		t.seqWithData[seq] = packet.Ack
-		message.DataSeq = seq
-	}
-
-	if isIncoming {
-		// If message have multiple packets, delete previous alias
-		if len(message.packets) > 1 {
-			delete(t.respAliases, message.ResponseAck)
-		}
-
-		message.UpdateResponseAck()
-		t.respAliases[message.ResponseAck] = message
-	}
-
-	// If message contains only single packet immediately dispatch it
-	if message.complete {
-		// log.Println("COMPLETE!", isIncoming, message)
-		if isIncoming {
-			if t.trackResponse {
-				// log.Println("Found response!", message.ResponseID, t.messages)
-
-				if resp, ok := t.messages[message.ResponseID]; ok {
-					if resp.complete {
-						t.dispatchMessage(resp)
-					}
-
-					t.dispatchMessage(message)
-				}
-			} else {
-				t.dispatchMessage(message)
-			}
-		} else {
-			if message.AssocMessage == nil {
-				return
-			}
-
-			if req, ok := t.messages[message.AssocMessage.ID()]; ok {
-				if req.complete {
-					t.dispatchMessage(req)
-					t.dispatchMessage(message)
-				}
-			}
-		}
-	}
-}
-
-// Receiver TCP messages from the listener channel
-func (t *Listener) Receiver() chan *TCPMessage {
-	return t.messagesChan
-}
-
-// Close tcp listener
-func (t *Listener) Close() {
-	close(t.quit)
-	if t.conn != nil {
-		t.conn.Close()
-	}
-
-	for _, h := range t.pcapHandles {
-		h.Close()
-	}
-
-	return
-}

capture/listener_test.go

@@ -1,617 +0,0 @@
-package capture
-
-import (
-	"bytes"
-	"log"
-	"math/rand"
-	"sync/atomic"
-	"testing"
-	"time"
-)
-
-func TestRawListenerInput(t *testing.T) {
-	var req, resp *TCPMessage
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	reqPacket := buildPacket(true, 1, 1, []byte("GET / HTTP/1.1\r\n\r\n"), time.Now())
-
-	respAck := reqPacket.Seq + uint32(len(reqPacket.Data))
-	respPacket := buildPacket(false, respAck, reqPacket.Seq+1, []byte("HTTP/1.1 200 OK\r\n\r\n"), time.Now())
-
-	listener.packetsChan <- reqPacket.dump()
-	listener.packetsChan <- respPacket.dump()
-
-	select {
-	case req = <-listener.messagesChan:
-	case <-time.After(time.Millisecond):
-		t.Error("Should return request immediately")
-		return
-	}
-
-	if !req.IsIncoming {
-		t.Error("Should be request")
-	}
-
-	select {
-	case resp = <-listener.messagesChan:
-	case <-time.After(20 * time.Millisecond):
-		t.Error("Should return response immediately")
-		return
-	}
-
-	if resp.IsIncoming {
-		t.Error("Should be response")
-	}
-}
-
-func firstPacket(payload []byte) *TCPPacket {
-	return buildPacket(
-		true,
-		1,
-		1,
-		payload,
-		time.Now(),
-	)
-}
-
-func nextPacket(prev *TCPPacket, payload []byte) *TCPPacket {
-	return buildPacket(
-		prev.SrcPort == 1,
-		prev.Ack,
-		prev.Seq+uint32(len(prev.Data)),
-		payload,
-		prev.timestamp.Add(time.Millisecond),
-	)
-}
-
-func responsePacket(prev *TCPPacket, payload []byte) *TCPPacket {
-	return buildPacket(
-		!(prev.SrcPort == 1),
-		prev.Seq+uint32(len(prev.Data)),
-		prev.Ack,
-		payload,
-		prev.timestamp.Add(time.Millisecond),
-	)
-}
-
-func TestHEADRequestNoBody(t *testing.T) {
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	reqPacket := firstPacket([]byte("HEAD / HTTP/1.1\r\nContent-Length: 0\r\n\r\n"))
-	respPacket := responsePacket(reqPacket, []byte("HTTP/1.1 200 OK\r\nContent-Length: 100\r\n\r\n"))
-
-	listener.packetsChan <- reqPacket.dump()
-	listener.packetsChan <- respPacket.dump()
-
-	var req, resp *TCPMessage
-	select {
-	case req = <-listener.messagesChan:
-	case <-time.After(time.Millisecond):
-		t.Error("Should return request immediately")
-		return
-	}
-
-	if !req.IsIncoming {
-		t.Error("Should be request")
-	}
-
-	select {
-	case resp = <-listener.messagesChan:
-	case <-time.After(20 * time.Millisecond):
-		t.Error("Should return response immediately")
-		return
-	}
-
-	if resp.IsIncoming {
-		t.Error("Should be response")
-	}
-}
-
-func TestSingleAck100Continue(t *testing.T) {
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	reqPacket1 := firstPacket([]byte("POST / HTTP/1.1\r\nExpect: 100-continue\r\nContent-Length: 4\r\n\r\n"))
-	respPacket1 := responsePacket(reqPacket1, []byte(""))
-	respPacket2 := responsePacket(reqPacket1, []byte("HTTP/1.1 100 Continue\r\n"))
-	reqPacket2 := responsePacket(respPacket2, []byte("DATA"))
-	respPacket3 := responsePacket(reqPacket2, []byte("HTTP/1.1 200 OK\r\n\r\n"))
-
-	result := []byte("POST / HTTP/1.1\r\nContent-Length: 4\r\n\r\nDATA")
-
-	testRawListener100Continue(t, listener, result,
-		reqPacket1,
-		respPacket1, respPacket2,
-		reqPacket2,
-		respPacket3)
-}
-
-func Test100ContinueWithoutWaiting(t *testing.T) {
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	req1 := firstPacket([]byte("POST / HTTP/1.1\r\nExpect: 100-continue\r\nContent-Length: 4\r\n\r\n"))
-	req2 := nextPacket(req1, []byte("DATA"))
-	resp1 := responsePacket(req1, []byte("HTTP/1.1 100 Continue\r\n"))
-	resp2 := responsePacket(req2, []byte("HTTP/1.1 200 OK\r\n\r\n"))
-
-	result := []byte("POST / HTTP/1.1\r\nContent-Length: 4\r\n\r\nDATA")
-
-	testRawListener100Continue(t, listener, result,
-		req1, req2, resp1, resp2)
-}
-
-// Client first sends data without waiting 100-continue, but once response received, generate packets based on Ack payload
-func Test100ContinueMixed(t *testing.T) {
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	req1 := firstPacket([]byte("POST / HTTP/1.1\r\nExpect: 100-continue\r\nContent-Length: 12\r\n\r\n"))
-	req2 := nextPacket(req1, []byte("DAT1"))
-	resp1 := responsePacket(req1, []byte("HTTP/1.1 100 Continue\r\n\r\n"))
-	req3 := responsePacket(resp1, []byte("DAT2"))
-	req3.Seq = req2.Seq + uint32(len(req2.Data))
-	req4 := nextPacket(req3, []byte("DAT3"))
-	resp2 := responsePacket(req4, []byte("HTTP/1.1 200 OK\r\n\r\n"))
-
-	result := []byte("POST / HTTP/1.1\r\nContent-Length: 12\r\n\r\nDAT1DAT2DAT3")
-
-	testRawListener100Continue(t, listener, result,
-		req1, req2, req3, req4, resp1, resp2)
-}
-
-func TestDoubleAck100Continue(t *testing.T) {
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	reqPacket1 := firstPacket([]byte("POST / HTTP/1.1\r\nExpect: 100-continue\r\nContent-Length: 4\r\n\r\n"))
-
-	respPacket1 := responsePacket(reqPacket1, []byte(""))
-	respPacket2 := responsePacket(reqPacket1, []byte("HTTP/1.1 100 Continue\r\n"))
-	reqPacket2 := responsePacket(respPacket2, []byte(""))
-	reqPacket3 := responsePacket(respPacket2, []byte("DATA"))
-	respPacket3 := responsePacket(reqPacket3, []byte("HTTP/1.1 200 OK\r\n\r\n"))
-
-	result := []byte("POST / HTTP/1.1\r\nContent-Length: 4\r\n\r\nDATA")
-
-	testRawListener100Continue(t, listener, result,
-		reqPacket1,
-		respPacket1, respPacket2,
-		reqPacket2, reqPacket3,
-		respPacket3)
-}
-
-func TestRawListenerInputResponseByClose(t *testing.T) {
-	var req, resp *TCPMessage
-
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	reqPacket := buildPacket(true, 1, 1, []byte("GET / HTTP/1.1\r\n\r\n"), time.Now())
-
-	respAck := reqPacket.Seq + uint32(len(reqPacket.Data))
-	respPacket := buildPacket(false, respAck, reqPacket.Seq+1, []byte("HTTP/1.1 200 OK\r\nConnection: close\r\n\r\nasd"), time.Now())
-	finPacket := buildPacket(false, respAck, reqPacket.Seq+2, []byte(""), time.Now())
-	finPacket.IsFIN = true
-
-	listener.packetsChan <- reqPacket.dump()
-	listener.packetsChan <- respPacket.dump()
-	listener.packetsChan <- finPacket.dump()
-
-	select {
-	case req = <-listener.messagesChan:
-	case <-time.After(time.Millisecond):
-		t.Error("Should return request immediately")
-		return
-	}
-
-	if !req.IsIncoming {
-		t.Error("Should be request")
-	}
-
-	select {
-	case resp = <-listener.messagesChan:
-	case <-time.After(20 * time.Millisecond):
-		t.Error("Should return response immediately")
-		return
-	}
-
-	if resp.IsIncoming {
-		t.Error("Should be response")
-	}
-}
-
-func TestRawListenerInputWithoutResponse(t *testing.T) {
-	var req *TCPMessage
-
-	listener := NewListener("", "0", EnginePcap, false, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	reqPacket := buildPacket(true, 1, 1, []byte("GET / HTTP/1.1\r\n\r\n"), time.Now())
-
-	listener.packetsChan <- reqPacket.dump()
-
-	select {
-	case req = <-listener.messagesChan:
-	case <-time.After(time.Millisecond):
-		t.Error("Should return request immediately")
-		return
-	}
-
-	if !req.IsIncoming {
-		t.Error("Should be request")
-	}
-}
-
-func TestRawListenerResponse(t *testing.T) {
-	var req, resp *TCPMessage
-
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	reqPacket := firstPacket([]byte("GET / HTTP/1.1\r\n\r\n"))
-	respPacket := responsePacket(reqPacket, []byte("HTTP/1.1 200 OK\r\n\r\n"))
-
-	// If response packet comes before request
-	listener.packetsChan <- respPacket.dump()
-	listener.packetsChan <- reqPacket.dump()
-
-	select {
-	case req = <-listener.messagesChan:
-	case <-time.After(time.Millisecond):
-		t.Error("Should return request immediately")
-		return
-	}
-
-	if !req.IsIncoming {
-		t.Error("Should be request")
-	}
-
-	select {
-	case resp = <-listener.messagesChan:
-	case <-time.After(time.Millisecond):
-		t.Error("Should return response immediately")
-		return
-	}
-
-	if resp.IsIncoming {
-		t.Error("Should be response")
-	}
-
-	if !bytes.Equal(resp.UUID(), req.UUID()) {
-		t.Error("Resp and Req UUID should be equal")
-	}
-}
-
-func get100ContinuePackets() (req []*TCPPacket, resp []*TCPPacket) {
-	req1 := firstPacket([]byte("POST / HTTP/1.1\r\nExpect: 100-continue\r\nContent-Length: 2\r\n\r\n"))
-	resp1 := responsePacket(req1, []byte("HTTP/1.1 100 Continue\r\n"))
-	req2 := responsePacket(resp1, []byte("a"))
-	req3 := nextPacket(req2, []byte("b"))
-	resp2 := responsePacket(req3, []byte("HTTP/1.1 200 OK\r\n\r\n"))
-
-	return []*TCPPacket{req1, req2, req3}, []*TCPPacket{resp1, resp2}
-}
-
-func TestShort100Continue(t *testing.T) {
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	req, resp := get100ContinuePackets()
-
-	result := []byte("POST / HTTP/1.1\r\nContent-Length: 2\r\n\r\nab")
-
-	testRawListener100Continue(t, listener, result, req[0], req[1], req[2], resp[0], resp[1])
-}
-
-// Response comes before Request
-func Test100ContinueWrongOrder(t *testing.T) {
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	req, resp := get100ContinuePackets()
-
-	result := []byte("POST / HTTP/1.1\r\nContent-Length: 2\r\n\r\nab")
-
-	testRawListener100Continue(t, listener, result, resp[0], resp[1], req[0], req[1], req[2])
-}
-
-func testRawListener100Continue(t *testing.T, listener *Listener, result []byte, packets ...*TCPPacket) {
-	var req, resp *TCPMessage
-	for _, p := range packets {
-		listener.packetsChan <- p.dump()
-	}
-
-	select {
-	case req = <-listener.messagesChan:
-		break
-	case <-time.After(11 * time.Millisecond):
-		t.Error("Should return response after expire time")
-		return
-	}
-
-	if !bytes.Equal(req.Bytes(), result) {
-		t.Error("Should receive full message", string(req.Bytes()))
-	}
-
-	if !req.IsIncoming {
-		t.Error("Should be request")
-	}
-
-	select {
-	case resp = <-listener.messagesChan:
-		break
-	case <-time.After(21 * time.Millisecond):
-		t.Error("Should return response after expire time")
-		return
-	}
-
-	if resp.IsIncoming {
-		t.Error("Should be response")
-	}
-
-	if !bytes.Equal(resp.UUID(), req.UUID()) {
-		t.Error("Resp and Req UUID should be equal")
-	}
-}
-
-func testChunkedSequence(t *testing.T, listener *Listener, packets ...*TCPPacket) {
-	var r, req, resp *TCPMessage
-
-	for _, p := range packets {
-		listener.packetsChan <- p.dump()
-	}
-
-	select {
-	case r = <-listener.messagesChan:
-		if r.IsIncoming {
-			req = r
-		} else {
-			resp = r
-		}
-		break
-	case <-time.After(25 * time.Millisecond):
-		t.Error("Should return request after expire time")
-		return
-	}
-	select {
-	case r = <-listener.messagesChan:
-		if r.IsIncoming {
-			if req != nil {
-				t.Error("Request already received", r)
-				return
-			}
-			req = r
-		} else {
-			if resp != nil {
-				t.Error("Response already received", r)
-				return
-			}
-			resp = r
-		}
-		break
-	case <-time.After(25 * time.Millisecond):
-		t.Error("Should return request after expire time")
-		return
-	}
-
-	if !bytes.Equal(req.Bytes(), []byte("POST / HTTP/1.1\r\nTransfer-Encoding: chunked\r\n\r\n1\r\na\r\n1\r\nb\r\n0\r\n\r\n")) {
-		t.Error("Should receive full message", string(req.Bytes()))
-	}
-
-	if !req.IsIncoming {
-		t.Error("Should be request")
-	}
-
-	if resp.IsIncoming {
-		t.Error("Should be response")
-	}
-
-	if !bytes.Equal(resp.UUID(), req.UUID()) {
-		t.Error("Resp and Req UUID should be equal", string(resp.UUID()), string(req.UUID()))
-	}
-
-	time.Sleep(20 * time.Millisecond)
-
-	if len(listener.packetsChan) != 0 {
-		t.Fatal("packetsChan non empty:", listener.packetsChan)
-	}
-
-	if len(listener.ackAliases) != 0 {
-		t.Fatal("ackAliases non empty:", listener.ackAliases)
-	}
-
-	if len(listener.seqWithData) != 0 {
-		t.Fatal("seqWithData non empty:", listener.seqWithData)
-	}
-
-	if len(listener.respAliases) != 0 {
-		t.Fatal("respAliases non empty:", listener.respAliases)
-	}
-}
-
-// permutation using heap algorithm https://en.wikipedia.org/wiki/Heap%27s_algorithm
-func permutation(a []*TCPPacket, f func([]*TCPPacket)) {
-	n := len(a)
-	c := make([]int, n)
-	f(a)
-	i := 0
-	for i < n {
-		if c[i] < i {
-			if i&1 != 1 {
-				a[0], a[i] = a[i], a[0]
-			} else {
-				a[c[i]], a[i] = a[i], a[c[i]]
-			}
-			f(a)
-			c[i]++
-			i = 0
-		} else {
-			c[i] = 0
-			i++
-		}
-	}
-}
-
-// Response comes before Request
-func TestRawListenerChunkedWrongOrder(t *testing.T) {
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	reqPacket1 := firstPacket([]byte("POST / HTTP/1.1\r\nTransfer-Encoding: chunked\r\nExpect: 100-continue\r\n\r\n"))
-
-	respPacket1 := responsePacket(reqPacket1, []byte("HTTP/1.1 100 Continue\r\n"))
-	reqPacket2 := responsePacket(respPacket1, []byte("1\r\na\r\n"))
-	reqPacket3 := nextPacket(reqPacket2, []byte("1\r\nb\r\n"))
-	reqPacket4 := nextPacket(reqPacket3, []byte("0\r\n\r\n"))
-
-	respPacket2 := responsePacket(reqPacket4, []byte("HTTP/1.1 200 OK\r\n\r\n"))
-
-	f := func(p []*TCPPacket) {
-		testChunkedSequence(t, listener, p...)
-	}
-	// Should re-construct message from all possible combinations
-	permutation([]*TCPPacket{reqPacket1, reqPacket2, reqPacket3, reqPacket4, respPacket1, respPacket2}, f)
-}
-
-func chunkedPostMessage() []*TCPPacket {
-	ack := uint32(rand.Int63())
-	seq := uint32(rand.Int63())
-
-	reqPacket1 := buildPacket(true, ack, seq, []byte("POST / HTTP/1.1\r\nTransfer-Encoding: chunked\r\n\r\n"), time.Now())
-	// Packet with data have different Seq
-	reqPacket2 := buildPacket(true, ack, seq+47, []byte("1\r\na\r\n"), time.Now())
-	reqPacket3 := buildPacket(true, ack, reqPacket2.Seq+5, []byte("1\r\nb\r\n"), time.Now())
-	reqPacket4 := buildPacket(true, ack, reqPacket3.Seq+5, []byte("0\r\n\r\n"), time.Now())
-
-	respPacket := buildPacket(false, reqPacket4.Seq+5 /* len of data */, ack, []byte("HTTP/1.1 200 OK\r\n\r\n"), time.Now())
-
-	return []*TCPPacket{
-		reqPacket1, reqPacket2, reqPacket3, reqPacket4, respPacket,
-	}
-}
-
-func postMessage() []*TCPPacket {
-	ack := uint32(rand.Int63())
-	seq2 := uint32(rand.Int63())
-	seq := uint32(rand.Int63())
-
-	c := 10000
-	data := make([]byte, c)
-	rand.Read(data)
-
-	head := []byte("POST / HTTP/1.1\r\nContent-Length: 9958\r\n\r\n")
-	for i := range head {
-		data[i] = head[i]
-	}
-
-	return []*TCPPacket{
-		buildPacket(true, ack, seq, data, time.Now()),
-		buildPacket(false, seq+uint32(len(data)), seq2, []byte("HTTP/1.1 200 OK\r\n\r\n"), time.Now()),
-	}
-}
-
-func getMessage() []*TCPPacket {
-	ack := uint32(rand.Int63())
-	seq2 := uint32(rand.Int63())
-	seq := uint32(rand.Int63())
-
-	return []*TCPPacket{
-		buildPacket(true, ack, seq, []byte("GET / HTTP/1.1\r\n\r\n"), time.Now()),
-		buildPacket(false, seq+18, seq2, []byte("HTTP/1.1 200 OK\r\n\r\n"), time.Now()),
-	}
-}
-
-// Response comes before Request
-func TestRawListenerBench(t *testing.T) {
-	l := NewListener("", "0", EnginePcap, true, 200*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer l.Close()
-
-	// Should re-construct message from all possible combinations
-	for i := 0; i < 1000; i++ {
-		go func(i int) {
-			for j := 0; j < 100; j++ {
-				var packets []*TCPPacket
-
-				if j%5 == 0 {
-					packets = chunkedPostMessage()
-				} else if j%3 == 0 {
-					packets = postMessage()
-				} else {
-					packets = getMessage()
-				}
-
-				for _, p := range packets {
-					// Randomly drop packets
-					if (i+j)%5 == 0 {
-						if rand.Int63()%3 == 0 {
-							continue
-						}
-					}
-
-					l.packetsChan <- p.dump()
-					time.Sleep(time.Millisecond)
-				}
-
-				time.Sleep(5 * time.Millisecond)
-			}
-		}(i)
-	}
-
-	ch := l.Receiver()
-
-	var count int32
-
-	for {
-		select {
-		case <-ch:
-			atomic.AddInt32(&count, 1)
-		case <-time.After(2000 * time.Millisecond):
-			log.Println("Emitted 200000 messages, captured: ", count, len(l.ackAliases), len(l.seqWithData), len(l.respAliases), len(l.respWithoutReq), len(l.packetsChan))
-			return
-		}
-	}
-}
-
-func TestResponseZeroContentLength(t *testing.T) {
-	var req, resp *TCPMessage
-	listener := NewListener("", "0", EnginePcap, true, 10*time.Millisecond, ProtocolHTTP, "", "", 0, false, false)
-	defer listener.Close()
-
-	reqPacket := firstPacket([]byte("POST /api/setup/install HTTP/1.1\r\nHost: localhost:22936\r\nUser-Agent: curl/7.57.0\r\nAccept: */*\r\nContent-Length: 0\r\nContent-Type: application/x-www-form-urlencoded\r\n\r\n"))
-	respPacket := responsePacket(reqPacket, []byte("HTTP/1.1 200\r\nDate: Fri, 11 May 2018 15:09:10 GMT\r\nServer: Kestrel\r\nCache-Control: no-cache\r\nTransfer-Encoding: chunked\r\n\r\n"))
-	respPacket2 := nextPacket(respPacket, []byte("0\r\n\r\n"))
-
-	// If response packet comes before request
-	listener.packetsChan <- reqPacket.dump()
-	listener.packetsChan <- respPacket.dump()
-	listener.packetsChan <- respPacket2.dump()
-
-	select {
-	case req = <-listener.messagesChan:
-	case <-time.After(time.Millisecond):
-		t.Error("Should return request immediately")
-		return
-	}
-
-	if !req.IsIncoming {
-		t.Error("Should be request")
-	}
-
-	select {
-	case resp = <-listener.messagesChan:
-	case <-time.After(time.Millisecond):
-		t.Error("Should return response immediately")
-		return
-	}
-
-	if resp.IsIncoming {
-		t.Error("Should be response")
-	}
-
-	if !bytes.Equal(resp.UUID(), req.UUID()) {
-		t.Error("Resp and Req UUID should be equal")
-	}
-}

capture/packet_test.go

@@ -0,0 +1,197 @@
+package capture
+
+import (
+	"encoding/binary"
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+)
+
+func generateHeader4(seq uint32, length uint16) []byte {
+	hdr := make([]byte, 4+24+24, 4+24+24)
+	binary.BigEndian.PutUint32(hdr, uint32(layers.ProtocolFamilyIPv4))
+
+	ip := hdr[4:]
+	ip[0] = 4<<4 | 6
+	binary.BigEndian.PutUint16(ip[2:4], length+24+24)
+	ip[9] = uint8(layers.IPProtocolTCP)
+	copy(ip[12:16], []byte{127, 0, 0, 1})
+	copy(ip[16:], []byte{127, 0, 0, 1})
+
+	// set tcp header
+	tcp := ip[24:]
+	tcp[12] = 6 << 4
+	binary.BigEndian.PutUint16(tcp, 5535)
+	binary.BigEndian.PutUint16(tcp[2:], 8000)
+	binary.BigEndian.PutUint32(tcp[4:], seq)
+	return hdr
+}
+
+func generateHeader6(seq uint32, length uint16) []byte {
+	hdr := make([]byte, 4+40+32+24, 4+40+32+24)
+	binary.BigEndian.PutUint32(hdr, uint32(layers.ProtocolFamilyIPv6Linux))
+
+	ip := hdr[4:]
+	ip[0] = 6 << 4
+	binary.BigEndian.PutUint16(ip[4:], length+32+24)
+	var ipAddr [16]byte
+	ipAddr[15] = 0x01
+	copy(ip[8:], ip[:])
+	copy(ip[24:], ip[:])
+	copy(ip[40:], []byte{
+		// net-layer (IPv6-Opts)
+		0x2b, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		uint8(layers.IPProtocolTCP), 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+	})
+
+	// set tcp header
+	tcp := ip[40+32:]
+	tcp[12] = 6 << 4
+	binary.BigEndian.PutUint16(tcp, 5535)
+	binary.BigEndian.PutUint16(tcp[2:], 8000)
+	binary.BigEndian.PutUint32(tcp[4:], seq)
+	return hdr
+}
+
+func Packets(start uint32, _len int, length uint16, version byte) []*Packet {
+	var packets = make([]*Packet, _len)
+	for i := start; i < start+uint32(_len); i++ {
+		var h []byte
+		if version == 4 {
+			h = generateHeader4(i, length)
+		} else {
+			h = generateHeader6(i, length)
+		}
+		d := append(h, make([]byte, int(length))...)
+		ci := &gopacket.CaptureInfo{Length: len(d), CaptureLength: len(d), Timestamp: time.Now()}
+		packets[i-start] = NewPacket(d, int(layers.LinkTypeLoop), 4, ci)
+	}
+	return packets
+}
+
+func TestIPv4Packet(t *testing.T) {
+	pckt := packet(append(generateHeader4(1024, 10), make([]byte, 10)...))
+	if pckt.Err != nil {
+		t.Error(pckt)
+		return
+	}
+	if err := packet(pckt.Data[:2]).Err; !errors.Is(err, ErrHdrLength("Link")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrLength("Link"), err)
+		return
+	}
+	if err := packet(pckt.Data[:20]).Err; !errors.Is(err, ErrHdrLength("IPv4")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrLength("IPv4"), err)
+		return
+	}
+	if err := packet(pckt.Data[:27]).Err; !errors.Is(err, ErrHdrLength("IPv4 opts")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrLength("IPv4 opts"), err)
+		return
+	}
+	if err := packet(pckt.Data[:40]).Err; !errors.Is(err, ErrHdrLength("TCP")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrLength("TCP opts"), err)
+		return
+	}
+	if err := packet(pckt.Data[:50]).Err; !errors.Is(err, ErrHdrLength("TCP opts")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrLength("TCP opts"), err)
+		return
+	}
+	pckt.TransLayer[12] = 0x10
+	if err := packet(pckt.Data[:50]).Err; !errors.Is(err, ErrHdrInvalid("TCP's data offset")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrInvalid("TCP's data offset"), err)
+		return
+	}
+	pckt.TransLayer[12] = 0x60
+	if err := packet(pckt.Data[:28]).Err; !errors.Is(err, ErrHdrMissing("TCP")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrMissing("TCP"), err)
+		return
+	}
+	pckt.NetLayer[9] = 0x02
+	if err := packet(pckt.Data).Err; !errors.Is(err, ErrHdrExpected("TCP")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrExpected("TCP"), err)
+		return
+	}
+	pckt.NetLayer[9] = 0x06
+	pckt.NetLayer[0] = 0x44
+	if err := packet(pckt.Data).Err; !errors.Is(err, ErrHdrInvalid("IPv4's IHL")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrInvalid("IPv4's IHL"), err)
+		return
+	}
+	pckt.NetLayer[0] = 0x56
+	if err := packet(pckt.Data).Err; !errors.Is(err, ErrHdrExpected("IPv4 or IPv6")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrExpected("IPv4 or IPv6"), err)
+		return
+	}
+}
+
+func TestIPv6Packet(t *testing.T) {
+	pckt := packet(append(generateHeader6(1024, 10), make([]byte, 10)...))
+	if pckt.Err != nil {
+		t.Error(pckt)
+		return
+	}
+	if err := packet(pckt.Data[:4]).Err; !errors.Is(err, ErrHdrMissing("IPv4 or IPv6")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrMissing("IPv4 or IPv6"), err)
+		return
+	}
+	if err := packet(pckt.Data[:40]).Err; !errors.Is(err, ErrHdrLength("IPv6")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrLength("IPv6"), err)
+		return
+	}
+	if err := packet(pckt.Data[:52]).Err; !errors.Is(err, ErrHdrLength("IPv6 opts")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrLength("IPv6 opts"), err)
+		return
+	}
+	if err := packet(pckt.Data[:80]).Err; !errors.Is(err, ErrHdrLength("TCP")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrLength("TCP opts"), err)
+		return
+	}
+	if err := packet(pckt.Data[:98]).Err; !errors.Is(err, ErrHdrLength("TCP opts")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrLength("TCP opts"), err)
+		return
+	}
+	pckt.TransLayer[12] = 0x10
+	if err := packet(pckt.Data).Err; !errors.Is(err, ErrHdrInvalid("TCP's data offset")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrInvalid("TCP's data offset"), err)
+		return
+	}
+	pckt.TransLayer[12] = 0x60
+	if err := packet(pckt.Data[:76]).Err; !errors.Is(err, ErrHdrMissing("TCP")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrMissing("TCP"), err)
+		return
+	}
+	pckt.NetLayer[56] = 0x02
+	if err := packet(pckt.Data).Err; !errors.Is(err, ErrHdrExpected("TCP")) {
+		t.Errorf("should fail with %q, got %q", ErrHdrExpected("TCP"), err)
+		return
+	}
+	pckt.NetLayer[56] = 0x06
+}
+
+func packet(data []byte) *Packet {
+	return NewPacket(data, int(layers.LinkTypeLoop), 4, &gopacket.CaptureInfo{})
+}
+
+func BenchmarkNewPacketIPv4(b *testing.B) {
+	data := append(generateHeader4(1204, 10), make([]byte, 10)...)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		if err := packet(data).Err; err != nil {
+			b.Error(err)
+		}
+	}
+}
+
+func BenchmarkNewPacketIPv6(b *testing.B) {
+	data := append(generateHeader6(1024, 10), make([]byte, 10)...)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		if err := packet(data).Err; err != nil {
+			b.Error(err)
+		}
+	}
+}

capture/sock_linux.go

@@ -0,0 +1,260 @@
+package capture
+
+import (
+	"fmt"
+	"net"
+	"sync"
+	"time"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+	"github.com/google/gopacket/pcap"
+)
+
+const (
+	// ETHALL htons(ETH_P_ALL)
+	ETHALL uint16 = unix.ETH_P_ALL<<8 | unix.ETH_P_ALL>>8
+	// BLOCKSIZE ring buffer block_size
+	BLOCKSIZE = 64 << 10
+	// BLOCKNR ring buffer block_nr
+	BLOCKNR = (2 << 20) / BLOCKSIZE // 2mb / 64kb
+	// FRAMESIZE ring buffer frame_size
+	FRAMESIZE = BLOCKSIZE
+	// FRAMENR ring buffer frame_nr
+	FRAMENR = BLOCKNR * BLOCKSIZE / FRAMESIZE
+	// MAPHUGE2MB 2mb huge map
+	MAPHUGE2MB = 21 << unix.MAP_HUGE_SHIFT
+)
+
+var tpacket2hdrlen = tpAlign(int(unsafe.Sizeof(unix.Tpacket2Hdr{})))
+
+// SockRaw is a linux M'maped af_packet socket
+type SockRaw struct {
+	mu          sync.Mutex
+	fd          int
+	ifindex     int
+	snaplen     int
+	pollTimeout uintptr
+	frame       uint32 // current frame
+	buf         []byte // points to the memory space of the ring buffer shared with the kernel.
+	loopIndex   int32  // this field must filled to avoid reading packet twice on a loopback device
+}
+
+// NewSocket returns new M'maped sock_raw on packet version 2.
+func NewSocket(ifi net.Interface) (*SockRaw, error) {
+	// sock create
+	fd, err := unix.Socket(unix.AF_PACKET, unix.SOCK_RAW, int(ETHALL))
+	if err != nil {
+		return nil, err
+	}
+	sock := &SockRaw{
+		fd:          fd,
+		ifindex:     ifi.Index,
+		snaplen:     FRAMESIZE,
+		pollTimeout: ^uintptr(0),
+	}
+
+	// set packet version
+	err = unix.SetsockoptInt(fd, unix.SOL_PACKET, unix.PACKET_VERSION, unix.TPACKET_V2)
+	if err != nil {
+		unix.Close(fd)
+		return nil, fmt.Errorf("setsockopt packet_version: %v", err)
+	}
+
+	// bind to interface
+	addr := unix.RawSockaddrLinklayer{
+		Family:   unix.AF_PACKET,
+		Protocol: ETHALL,
+		Ifindex:  int32(ifi.Index),
+	}
+	_, _, e := unix.Syscall(
+		unix.SYS_BIND,
+		uintptr(fd),
+		uintptr(unsafe.Pointer(&addr)),
+		uintptr(unix.SizeofSockaddrLinklayer),
+	)
+	if e != 0 {
+		unix.Close(fd)
+		return nil, e
+	}
+
+	// create shared-memory ring buffer
+	tp := &unix.TpacketReq{
+		Block_size: BLOCKSIZE,
+		Block_nr:   BLOCKNR,
+		Frame_size: FRAMESIZE,
+		Frame_nr:   FRAMENR,
+	}
+	err = unix.SetsockoptTpacketReq(sock.fd, unix.SOL_PACKET, unix.PACKET_RX_RING, tp)
+	if err != nil {
+		unix.Close(fd)
+		return nil, fmt.Errorf("setsockopt packet_rx_ring: %v", err)
+	}
+	sock.buf, err = unix.Mmap(
+		sock.fd,
+		0,
+		BLOCKSIZE*BLOCKNR,
+		unix.PROT_READ|unix.PROT_WRITE,
+		unix.MAP_SHARED|MAPHUGE2MB,
+	)
+	if err != nil {
+		unix.Close(fd)
+		return nil, fmt.Errorf("socket mmap error: %v", err)
+	}
+	return sock, nil
+}
+
+// ReadPacketData implements gopacket.PacketDataSource.
+func (sock *SockRaw) ZeroCopyReadPacketData() (buf []byte, ci gopacket.CaptureInfo, err error) {
+	sock.mu.Lock()
+	defer sock.mu.Unlock()
+	var tpHdr *unix.Tpacket2Hdr
+	poll := &unix.PollFd{
+		Fd:     int32(sock.fd),
+		Events: unix.POLLIN,
+	}
+	var i int
+read:
+	i = int(sock.frame * FRAMESIZE)
+	tpHdr = (*unix.Tpacket2Hdr)(unsafe.Pointer(&sock.buf[i]))
+	sock.frame = (sock.frame + 1) % FRAMENR
+
+	if tpHdr.Status&unix.TP_STATUS_USER == 0 {
+		_, _, e := unix.Syscall(unix.SYS_POLL, uintptr(unsafe.Pointer(poll)), 1, sock.pollTimeout)
+		if e != 0 && e != unix.EINTR {
+			return buf, ci, e
+		}
+		// it might be some other frame with data!
+		if tpHdr.Status&unix.TP_STATUS_USER == 0 {
+			goto read
+		}
+	}
+	tpHdr.Status = unix.TP_STATUS_KERNEL
+	sockAddr := (*unix.RawSockaddrLinklayer)(unsafe.Pointer(&sock.buf[i+tpacket2hdrlen]))
+
+	// parse out repeating packets on loopback
+	if sockAddr.Ifindex == sock.loopIndex && sock.frame%2 != 0 {
+		goto read
+	}
+
+	ci.Length = int(tpHdr.Len)
+	ci.Timestamp = time.Unix(int64(tpHdr.Sec), int64(tpHdr.Nsec))
+	ci.InterfaceIndex = int(sockAddr.Ifindex)
+	buf = make([]byte, tpHdr.Snaplen)
+	ci.CaptureLength = copy(buf, sock.buf[i+int(tpHdr.Mac):])
+
+	return
+}
+
+// Close closes the underlying socket
+func (sock *SockRaw) Close() (err error) {
+	sock.mu.Lock()
+	defer sock.mu.Unlock()
+	if sock.fd != -1 {
+		unix.Munmap(sock.buf)
+		sock.buf = nil
+		err = unix.Close(sock.fd)
+		sock.fd = -1
+	}
+	return
+}
+
+// SetSnapLen sets the maximum capture length to the given value.
+// for this to take effects on the kernel level SetBPFilter should be called too.
+func (sock *SockRaw) SetSnapLen(snap int) error {
+	sock.mu.Lock()
+	defer sock.mu.Unlock()
+	if snap < 0 {
+		return fmt.Errorf("expected %d snap length to be at least 0", snap)
+	}
+	if snap > FRAMESIZE {
+		snap = FRAMESIZE
+	}
+	sock.snaplen = snap
+	return nil
+}
+
+// SetTimeout sets poll wait timeout for the socket.
+// negative value will block forever
+func (sock *SockRaw) SetTimeout(t time.Duration) error {
+	sock.mu.Lock()
+	defer sock.mu.Unlock()
+	sock.pollTimeout = uintptr(t)
+	return nil
+}
+
+// GetSnapLen returns the maximum capture length
+func (sock *SockRaw) GetSnapLen() int {
+	sock.mu.Lock()
+	defer sock.mu.Unlock()
+	return sock.snaplen
+}
+
+// SetBPFFilter compiles and sets a BPF filter for the socket handle.
+func (sock *SockRaw) SetBPFFilter(expr string) error {
+	sock.mu.Lock()
+	defer sock.mu.Unlock()
+	if expr == "" {
+		return unix.SetsockoptInt(sock.fd, unix.SOL_SOCKET, unix.SO_DETACH_FILTER, 0)
+	}
+	filter, err := pcap.CompileBPFFilter(layers.LinkTypeEthernet, sock.snaplen, expr)
+	if err != nil {
+		return err
+	}
+	if len(filter) > int(^uint16(0)) {
+		return fmt.Errorf("filters out of range 0-%d", ^uint16(0))
+	}
+	if len(filter) == 0 {
+		return unix.SetsockoptInt(sock.fd, unix.SOL_SOCKET, unix.SO_DETACH_FILTER, 0)
+	}
+	fprog := &unix.SockFprog{
+		Len:    uint16(len(filter)),
+		Filter: &(*(*[]unix.SockFilter)(unsafe.Pointer(&filter)))[0],
+	}
+	return unix.SetsockoptSockFprog(sock.fd, unix.SOL_SOCKET, unix.SO_ATTACH_FILTER, fprog)
+}
+
+// SetPromiscuous sets promiscous mode to the required value. for better result capture on all interfaces instead.
+// If it is enabled, traffic not destined for the interface will also be captured.
+func (sock *SockRaw) SetPromiscuous(b bool) error {
+	sock.mu.Lock()
+	defer sock.mu.Unlock()
+	mreq := unix.PacketMreq{
+		Ifindex: int32(sock.ifindex),
+		Type:    unix.PACKET_MR_PROMISC,
+	}
+
+	opt := unix.PACKET_ADD_MEMBERSHIP
+	if !b {
+		opt = unix.PACKET_DROP_MEMBERSHIP
+	}
+
+	return unix.SetsockoptPacketMreq(sock.fd, unix.SOL_PACKET, opt, &mreq)
+}
+
+// Stats returns number of packets and dropped packets. This will be the number of packets/dropped packets since the last call to stats (not the cummulative sum!).
+func (sock *SockRaw) Stats() (*unix.TpacketStats, error) {
+	sock.mu.Lock()
+	defer sock.mu.Unlock()
+	return unix.GetsockoptTpacketStats(sock.fd, unix.SOL_PACKET, unix.PACKET_STATISTICS)
+}
+
+// SetLoopbackIndex necessary to avoid reading packet twice on a loopback device
+func (sock *SockRaw) SetLoopbackIndex(i int32) {
+	sock.mu.Lock()
+	defer sock.mu.Unlock()
+	sock.loopIndex = i
+}
+
+// WritePacketData transmits a raw packet.
+func (sock *SockRaw) WritePacketData(pkt []byte) error {
+	_, err := unix.Write(sock.fd, pkt)
+	return err
+}
+
+func tpAlign(x int) int {
+	return int((uint(x) + unix.TPACKET_ALIGNMENT - 1) &^ (unix.TPACKET_ALIGNMENT - 1))
+}

capture/sock_others.go

@@ -0,0 +1,13 @@
+// +build !linux
+
+package capture
+
+import (
+	"errors"
+	"net"
+)
+
+// NewSocket returns new M'maped sock_raw on packet version 2.
+func NewSocket(_ net.Interface) (Socket, error) {
+	return nil, errors.New("afpacket socket is only available on linux")
+}

capture/socket.go

@@ -0,0 +1,20 @@
+package capture
+
+import (
+	"time"
+
+	"github.com/google/gopacket"
+)
+
+// Socket is any interface that defines the behaviors of Socket
+type Socket interface {
+	ZeroCopyReadPacketData() ([]byte, gopacket.CaptureInfo, error)
+	WritePacketData([]byte) error
+	SetBPFFilter(string) error
+	SetPromiscuous(bool) error
+	SetSnapLen(int) error
+	GetSnapLen() int
+	SetTimeout(time.Duration) error
+	SetLoopbackIndex(i int32)
+	Close() error
+}

capture/tcp_message.go

@@ -1,522 +0,0 @@
-package capture
-
-import (
-	"bytes"
-	"crypto/sha1"
-	"encoding/binary"
-	"encoding/hex"
-	"net"
-	"strconv"
-	"strings"
-	"time"
-
-	"github.com/buger/goreplay/proto"
-)
-
-// TCPProtocol is a number to indicate type of protocol
-type TCPProtocol uint8
-
-const (
-	// ProtocolHTTP ...
-	ProtocolHTTP TCPProtocol = 0
-	// ProtocolBinary ...
-	ProtocolBinary TCPProtocol = 1
-)
-
-// TCPMessage ensure that all TCP packets for given request is received, and processed in right sequence
-// Its needed because all TCP message can be fragmented or re-transmitted
-//
-// Each TCP Packet have 2 ids: acknowledgment - message_id, and sequence - packet_id
-// Message can be compiled from unique packets with same message_id which sorted by sequence
-// Message is received if we didn't receive any packets for 2000ms
-type TCPMessage struct {
-	Seq         uint32
-	Ack         uint32
-	ResponseAck uint32
-	ResponseID  tcpID
-	DataAck     uint32
-	DataSeq     uint32
-
-	AssocMessage *TCPMessage
-	Start        time.Time
-	End          time.Time
-	IsIncoming   bool
-
-	packets []*TCPPacket
-
-	delChan chan *TCPMessage
-
-	protocol TCPProtocol
-
-	/* HTTP specific variables */
-	methodType    httpMethodType
-	bodyType      httpBodyType
-	expectType    httpExpectType
-	seqMissing    bool
-	headerPacket  int
-	contentLength int
-	complete      bool
-}
-
-// NewTCPMessage pointer created from a Acknowledgment number and a channel of messages readuy to be deleted
-func NewTCPMessage(Seq, Ack uint32, IsIncoming bool, protocol TCPProtocol, timestamp time.Time) (msg *TCPMessage) {
-	msg = &TCPMessage{Seq: Seq, Ack: Ack, IsIncoming: IsIncoming, protocol: protocol, Start: timestamp}
-	msg.Start = time.Now()
-
-	return
-}
-
-func (t *TCPMessage) packetsData() (d [][]byte) {
-	d = make([][]byte, len(t.packets))
-	for i, p := range t.packets {
-		d[i] = p.Data
-	}
-
-	return
-}
-
-// Bytes return message content
-func (t *TCPMessage) Bytes() (output []byte) {
-	for _, p := range t.packets {
-		output = append(output, p.Data...)
-	}
-
-	return output
-}
-
-// BodySize returns total body size
-func (t *TCPMessage) BodySize() (size int) {
-	if len(t.packets) == 0 || t.headerPacket == -1 {
-		return 0
-	}
-
-	size += len(proto.Body(t.packets[t.headerPacket].Data))
-
-	for _, p := range t.packets[t.headerPacket+1:] {
-		size += len(p.Data)
-	}
-
-	return
-}
-
-// Size returns total size of message
-func (t *TCPMessage) Size() (size int) {
-	if len(t.packets) == 0 {
-		return 0
-	}
-
-	for _, p := range t.packets {
-		size += len(p.Data)
-	}
-
-	return
-}
-
-// AddPacket to the message and ensure packet uniqueness
-// TCP allows that packet can be re-send multiple times
-func (t *TCPMessage) AddPacket(packet *TCPPacket) {
-	for _, pkt := range t.packets {
-		if packet.Seq == pkt.Seq {
-			return
-		}
-	}
-
-	// Packets not always captured in same Seq order, and sometimes we need to prepend
-	if len(t.packets) == 0 || packet.Seq > t.packets[len(t.packets)-1].Seq {
-		t.packets = append(t.packets, packet)
-	} else if packet.Seq < t.packets[0].Seq {
-		t.packets = append([]*TCPPacket{packet}, t.packets...)
-		t.Seq = packet.Seq // Message Seq should indicated starting seq
-	} else { // insert somewhere in the middle...
-		for i, p := range t.packets {
-			if packet.Seq < p.Seq {
-				t.packets = append(t.packets[:i], append([]*TCPPacket{packet}, t.packets[i:]...)...)
-				break
-			}
-		}
-
-		if packet.OrigAck != 0 {
-			t.DataAck = packet.OrigAck
-		}
-
-		if packet.timestamp.Before(t.Start) || t.Start.IsZero() {
-			t.Start = packet.timestamp
-		}
-
-		if packet.timestamp.After(t.End) || t.End.IsZero() {
-			t.End = packet.timestamp
-		}
-	}
-
-	t.checkSeqIntegrity()
-
-	if t.protocol == ProtocolHTTP {
-		t.updateHeadersPacket()
-		t.updateMethodType()
-		t.updateBodyType()
-		t.check100Continue()
-		t.checkIfComplete()
-	}
-}
-
-// Check if there is missing packet
-func (t *TCPMessage) checkSeqIntegrity() {
-	if len(t.packets) == 1 {
-		t.seqMissing = false
-	}
-
-	offset := len(t.packets) - 1
-
-	if t.packets[offset].IsFIN {
-		offset--
-
-		if offset < 0 {
-			return
-		}
-	}
-
-	for i, p := range t.packets[:offset] {
-		if p.IsFIN {
-			continue
-		}
-
-		// If final packet
-		if len(t.packets) == i+1 {
-			t.seqMissing = false
-			return
-		}
-		np := t.packets[i+1]
-
-		nextSeq := p.Seq + uint32(len(p.Data))
-
-		if np.Seq != nextSeq {
-			if t.protocol == ProtocolHTTP && t.expectType == httpExpect100Continue {
-				if np.Seq != nextSeq+22 {
-					t.seqMissing = true
-					return
-				}
-			} else {
-				t.seqMissing = true
-				return
-			}
-		}
-	}
-
-	t.seqMissing = false
-}
-
-var bEmptyLine = []byte("\r\n\r\n")
-var bBR = []byte("\r\n")
-
-// last-chunk always is 0\r\n\r\n\. More info https://tools.ietf.org/html/rfc2616#section-3.6.1
-var bChunkEnd = []byte("0\r\n\r\n")
-
-func (t *TCPMessage) updateHeadersPacket() {
-	if len(t.packets) == 1 {
-		t.headerPacket = -1
-	}
-
-	if t.headerPacket != -1 {
-		return
-	}
-
-	if t.seqMissing {
-		return
-	}
-
-	for i, p := range t.packets {
-		if len(p.Data) >= len(bEmptyLine) {
-			if bytes.LastIndex(p.Data, bEmptyLine) != -1 {
-				t.headerPacket = i
-				return
-			}
-		} else if i > 0 && bytes.Equal(p.Data, bBR) {
-			idx := bytes.LastIndex(t.packets[i-1].Data, bBR)
-			if idx != -1 && idx == len(t.packets[i-1].Data)-len(bBR) {
-				t.headerPacket = i
-				return
-			}
-		}
-	}
-
-	return
-}
-
-// checkIfComplete returns true if all of the packets that compse the message arrived.
-func (t *TCPMessage) checkIfComplete() {
-	if t.seqMissing || t.headerPacket == -1 {
-		// log.Println("Seq missing", t.seqMissing, t.packets)
-		return
-	}
-
-	if t.methodType == httpMethodNotFound {
-		// log.Println("Method missing", t.methodType, t.packets)
-		return
-	}
-
-	// Responses can be emitted only if we found request
-	if !t.IsIncoming && t.AssocMessage == nil {
-		// log.Println("Assoc not found", t)
-		return
-	}
-
-	// log.Println("Found?", t)
-
-	switch t.bodyType {
-	case httpBodyEmpty:
-		t.complete = true
-	case httpBodyContentLength:
-		if t.contentLength == 0 || t.contentLength == t.BodySize() {
-			t.complete = true
-		}
-	case httpBodyChunked:
-		lastPacket := t.packets[len(t.packets)-1]
-		if bytes.LastIndex(lastPacket.Data, bChunkEnd) != -1 {
-			t.complete = true
-		}
-	default:
-		if len(t.packets) == 0 {
-			return
-		}
-
-		last := t.packets[len(t.packets)-1]
-		if last.IsFIN {
-			t.complete = true
-		}
-	}
-}
-
-type httpMethodType uint8
-
-const (
-	httpMethodNotSet   httpMethodType = 0
-	httpMethodKnown    httpMethodType = 1
-	httpMethodNotFound httpMethodType = 2
-)
-
-func (t *TCPMessage) updateMethodType() {
-	// if there is cache
-	if t.methodType != httpMethodNotSet && t.methodType != httpMethodNotFound {
-		return
-	}
-
-	d := t.packets[0].Data
-
-	// Minimum length fo request: GET / HTTP/1.1\r\n
-
-	if len(d) < 16 {
-		t.methodType = httpMethodNotFound
-		return
-	}
-
-	if t.IsIncoming {
-		if mIdx := bytes.IndexByte(d[:8], ' '); mIdx != -1 {
-			// Check that after method we have absolute or relative path
-			switch d[mIdx+1] {
-			case '/', 'h', '*':
-			default:
-				t.methodType = httpMethodNotFound
-				return
-			}
-		} else {
-			t.methodType = httpMethodNotFound
-			return
-		}
-
-		t.methodType = httpMethodKnown
-	} else {
-		if !bytes.Equal(d[:6], []byte("HTTP/1")) {
-			t.methodType = httpMethodNotFound
-			return
-		}
-
-		t.methodType = httpMethodKnown
-	}
-}
-
-type httpBodyType uint8
-
-const (
-	httpBodyNotSet          httpBodyType = 0
-	httpBodyEmpty           httpBodyType = 1
-	httpBodyContentLength   httpBodyType = 2
-	httpBodyChunked         httpBodyType = 3
-	httpBodyConnectionClose httpBodyType = 4
-)
-
-func (t *TCPMessage) updateBodyType() {
-	// if there is cache
-	if t.bodyType != httpBodyNotSet {
-		return
-	}
-
-	// Headers not received
-	if t.headerPacket == -1 {
-		return
-	}
-
-	var lengthB, encB, connB []byte
-
-	proto.ParseHeaders(t.packetsData(), func(header, value []byte) bool {
-		if proto.HeadersEqual(header, []byte("Content-Length")) {
-			lengthB = value
-			return false
-		}
-
-		if proto.HeadersEqual(header, []byte("Transfer-Encoding")) {
-			encB = value
-			return false
-		}
-
-		if proto.HeadersEqual(header, []byte("Connection")) {
-			connB = value
-		}
-
-		return true
-	})
-
-	switch t.methodType {
-	case httpMethodNotFound:
-		return
-	case httpMethodKnown:
-
-		if !t.IsIncoming &&
-			t.AssocMessage != nil &&
-			bytes.IndexByte(t.AssocMessage.Bytes(), ' ') > -1 &&
-			bytes.Equal([]byte("HEAD"), proto.Method(t.AssocMessage.Bytes())) {
-			// Need to check if this is a response to a head request,
-			// in which case the body has to be empty regardless.
-			t.bodyType = httpBodyEmpty
-			return
-		}
-
-		if len(lengthB) > 0 {
-			t.contentLength, _ = strconv.Atoi(string(lengthB))
-			if t.contentLength == 0 {
-				t.bodyType = httpBodyEmpty
-			} else {
-				t.bodyType = httpBodyContentLength
-			}
-			return
-		}
-
-		if len(encB) > 0 {
-			t.bodyType = httpBodyChunked
-			return
-		}
-
-		if len(connB) > 0 && bytes.Equal(connB, []byte("close")) {
-			t.bodyType = httpBodyConnectionClose
-			return
-		}
-	}
-
-	t.bodyType = httpBodyEmpty
-}
-
-type httpExpectType uint8
-
-const (
-	httpExpectNotSet      httpExpectType = 0
-	httpExpectEmpty       httpExpectType = 1
-	httpExpect100Continue httpExpectType = 2
-)
-
-var bExpectHeader = []byte("Expect")
-var bExpect100Value = []byte("100-continue")
-
-func (t *TCPMessage) check100Continue() {
-	if t.expectType != httpExpectNotSet || len(t.packets[0].Data) < 25 {
-		return
-	}
-
-	if t.seqMissing || t.headerPacket == -1 {
-		return
-	}
-
-	last := t.packets[len(t.packets)-1]
-	// reading last 4 bytes for double CRLF
-	if !bytes.HasSuffix(last.Data, bEmptyLine) {
-		return
-	}
-
-	var expectB []byte
-	proto.ParseHeaders(t.packetsData(), func(header, value []byte) bool {
-		if proto.HeadersEqual(header, bExpectHeader) {
-			expectB = value
-			return false
-		}
-
-		return true
-	})
-
-	if len(expectB) > 0 && bytes.Equal(bExpect100Value, expectB) {
-		t.expectType = httpExpect100Continue
-		return
-	}
-
-	t.expectType = httpExpectEmpty
-}
-
-func (t *TCPMessage) setAssocMessage(m *TCPMessage) {
-	t.AssocMessage = m
-	t.checkIfComplete()
-}
-
-// UpdateResponseAck should be called after packet is added
-func (t *TCPMessage) UpdateResponseAck() uint32 {
-	lastPacket := t.packets[len(t.packets)-1]
-	if lastPacket.IsFIN && len(t.packets) > 1 {
-		lastPacket = t.packets[len(t.packets)-2]
-	}
-
-	respAck := lastPacket.Seq + uint32(len(lastPacket.Data))
-
-	if t.ResponseAck != respAck {
-		t.ResponseAck = lastPacket.Seq + uint32(len(lastPacket.Data))
-
-		// We swappwed src and dst port
-		copy(t.ResponseID[:16], lastPacket.Addr)
-		copy(t.ResponseID[16:], lastPacket.Raw[2:4]) // Src port
-		copy(t.ResponseID[18:], lastPacket.Raw[0:2]) // Dest port
-		binary.BigEndian.PutUint32(t.ResponseID[20:24], t.ResponseAck)
-	}
-
-	return t.ResponseAck
-}
-
-func (t *TCPMessage) UUID() []byte {
-	var key []byte
-
-	if t.IsIncoming {
-		// log.Println("UUID:", t.Ack, t.Start.UnixNano())
-		key = strconv.AppendInt(key, t.Start.UnixNano(), 10)
-		key = strconv.AppendUint(key, uint64(t.Ack), 10)
-	} else {
-		// log.Println("RequestMessage:", t.AssocMessage.Ack, t.AssocMessage.Start.UnixNano())
-		key = strconv.AppendInt(key, t.AssocMessage.Start.UnixNano(), 10)
-		key = strconv.AppendUint(key, uint64(t.AssocMessage.Ack), 10)
-	}
-
-	uuid := make([]byte, 40)
-	sha := sha1.Sum(key)
-	hex.Encode(uuid, sha[:20])
-
-	return uuid
-}
-
-func (t *TCPMessage) ID() tcpID {
-	return t.packets[0].ID
-}
-
-func (t *TCPMessage) IP() net.IP {
-	return net.IP(t.packets[0].Addr)
-}
-
-func (t *TCPMessage) String() string {
-	return strings.Join([]string{
-		"Len packets: " + strconv.Itoa(len(t.packets)),
-		"Data size:" + strconv.Itoa(len(t.Bytes())),
-		"Data:" + string(t.Bytes()),
-	}, "\n")
-}

capture/tcp_message_test.go

@@ -1,257 +0,0 @@
-package capture
-
-import (
-	"bytes"
-	"encoding/binary"
-	_ "log"
-	"testing"
-	"time"
-)
-
-func buildPacket(isIncoming bool, Ack, Seq uint32, Data []byte, timestamp time.Time) (packet *TCPPacket) {
-	var srcPort, destPort uint16
-
-	// For tests `listening` port is 0
-	if isIncoming {
-		srcPort = 1
-	} else {
-		destPort = 1
-	}
-
-	buf := make([]byte, 16)
-	binary.BigEndian.PutUint16(buf[2:4], destPort)
-	binary.BigEndian.PutUint16(buf[0:2], srcPort)
-	binary.BigEndian.PutUint32(buf[4:8], Seq)
-	binary.BigEndian.PutUint32(buf[8:12], Ack)
-	buf[12] = 64
-	buf = append(buf, Data...)
-
-	packet = ParseTCPPacket([]byte("123"), buf, timestamp)
-
-	return packet
-}
-
-func buildMessage(p *TCPPacket) *TCPMessage {
-	isIncoming := false
-	if p.SrcPort == 1 {
-		isIncoming = true
-	}
-	m := NewTCPMessage(p.Seq, p.Ack, isIncoming, ProtocolHTTP, p.timestamp)
-	m.AddPacket(p)
-
-	return m
-}
-
-func TestTCPMessagePacketsOrder(t *testing.T) {
-	msg := buildMessage(buildPacket(true, 1, 1, []byte("a"), time.Now()))
-	msg.AddPacket(buildPacket(true, 1, 2, []byte("b"), time.Now()))
-
-	if !bytes.Equal(msg.Bytes(), []byte("ab")) {
-		t.Error("Should contatenate packets in right order")
-	}
-
-	// When first packet have wrong order (Seq)
-	msg = buildMessage(buildPacket(true, 1, 2, []byte("b"), time.Now()))
-	msg.AddPacket(buildPacket(true, 1, 1, []byte("a"), time.Now()))
-
-	if !bytes.Equal(msg.Bytes(), []byte("ab")) {
-		t.Error("Should contatenate packets in right order")
-	}
-
-	// Should ignore packets with same sequence
-	msg = buildMessage(buildPacket(true, 1, 1, []byte("a"), time.Now()))
-	msg.AddPacket(buildPacket(true, 1, 1, []byte("a"), time.Now()))
-
-	if !bytes.Equal(msg.Bytes(), []byte("a")) {
-		t.Error("Should ignore packet with same Seq")
-	}
-}
-
-func TestTCPMessageSize(t *testing.T) {
-	msg := buildMessage(buildPacket(true, 1, 1, []byte("POST / HTTP/1.1\r\nContent-Length: 2\r\n\r\na"), time.Now()))
-	msg.AddPacket(buildPacket(true, 1, 2, []byte("b"), time.Now()))
-
-	if msg.BodySize() != 2 {
-		t.Error("Should count only body", msg.BodySize())
-	}
-
-	if msg.Size() != 40 {
-		t.Error("Should count all sizes", msg.Size())
-	}
-}
-
-func TestTCPMessageIsComplete(t *testing.T) {
-	testCases := []struct {
-		direction         bool
-		payload           string
-		assocMessage      bool
-		expectedCompleted bool
-	}{
-		{true, "GET / HTTP/1.1\r\n\r\n", false, true},
-		{true, "HEAD / HTTP/1.1\r\n\r\n", false, true},
-		{false, "HTTP/1.1 200 OK\r\n\r\n", true, true},
-		{true, "POST / HTTP/1.1\r\nContent-Length: 1\r\n\r\na", false, true},
-		{true, "PUT / HTTP/1.1\r\nContent-Length: 1\r\n\r\na", false, true},
-		{false, "HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n", true, true},
-		{false, "HTTP/1.1 200 OK\r\nContent-Length: 1\r\n\r\na", true, true},
-		{false, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n0\r\n\r\n", true, true},
-
-		// chunked not finished
-		{false, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n", true, false},
-
-		// content-length != actual length
-		{true, "POST / HTTP/1.1\r\nContent-Length: 2\r\n\r\na", false, false},
-		{false, "HTTP/1.1 200 OK\r\nContent-Length: 10\r\n\r\na", true, false},
-		// non-valid http request
-		{true, "UNKNOWN asd HTTP/1.1\r\n\r\n", false, false},
-
-		// response without associated request
-		{false, "HTTP/1.1 200 OK\r\n\r\n", false, false},
-	}
-
-	for _, tc := range testCases {
-		msg := buildMessage(buildPacket(tc.direction, 1, 1, []byte(tc.payload), time.Now()))
-		if tc.assocMessage {
-			msg.AssocMessage = &TCPMessage{}
-		}
-		msg.checkIfComplete()
-
-		if msg.complete != tc.expectedCompleted {
-			t.Errorf("Payload %s: Expected %t, got %t.", tc.payload, tc.expectedCompleted, msg.complete)
-		}
-	}
-}
-
-func TestTCPMessageIsSeqMissing(t *testing.T) {
-	p1 := buildPacket(false, 1, 1, []byte("HTTP/1.1 200 OK\r\n"), time.Now())
-	p2 := buildPacket(false, 1, p1.Seq+uint32(len(p1.Data)), []byte("Content-Length: 10\r\n\r\n"), time.Now())
-	p3 := buildPacket(false, 1, p2.Seq+uint32(len(p2.Data)), []byte("a"), time.Now())
-
-	msg := buildMessage(p1)
-	if msg.seqMissing {
-		t.Error("Should be complete if have only 1 packet")
-	}
-
-	msg.AddPacket(p3)
-	if !msg.seqMissing {
-		t.Error("Should be incomplete because missing middle component")
-	}
-
-	msg.AddPacket(p2)
-	if msg.seqMissing {
-		t.Error("Should be complete once missing packet added")
-	}
-}
-
-func TestTCPMessageIsHeadersReceived(t *testing.T) {
-	p1 := buildPacket(false, 1, 1, []byte("HTTP/1.1 200 OK\r\n\r\n"), time.Now())
-	p2 := buildPacket(false, 1, p1.Seq+uint32(len(p1.Data)), []byte("Content-Length: 10\r\n\r\n"), time.Now())
-
-	msg := buildMessage(p1)
-	if msg.headerPacket == -1 {
-		t.Error("Should be complete if have only 1 packet", msg.headerPacket)
-	}
-
-	msg.AddPacket(p2)
-	if msg.headerPacket == -1 {
-		t.Error("Should found double new line: headers received")
-	}
-
-	msg = buildMessage(buildPacket(true, 1, 1, []byte("GET / HTTP/1.1\r\nContent-Length: 1\r\n"), time.Now()))
-	if msg.headerPacket != -1 {
-		t.Error("Should not find headers end")
-	}
-}
-
-func TestTCPMessageMethodType(t *testing.T) {
-	testCases := []struct {
-		direction          bool
-		payload            string
-		expectedMethodType httpMethodType
-	}{
-		{true, "GET / HTTP/1.1\r\n\r\n", httpMethodKnown},
-		{true, "GET * HTTP/1.1\r\n\r\n", httpMethodKnown},
-		{true, "UNKNOWN / HTTP/1.1\r\n\r\n", httpMethodKnown},
-		{true, "GET http://example.com HTTP/1.1\r\n\r\n", httpMethodKnown},
-		{true, "POST / HTTP/1.1\r\n\r\n", httpMethodKnown},
-		{true, "PUT / HTTP/1.1\r\n\r\n", httpMethodKnown},
-		{true, "GET zxc HTTP/1.1\r\n\r\n", httpMethodNotFound},
-		{true, "GET / HTTP\r\n\r\n", httpMethodNotFound},
-		{true, "VERYLONGMETHOD / HTTP/1.1\r\n\r\n", httpMethodNotFound},
-		{false, "HTTP/1.1 200 OK\r\n\r\n", httpMethodKnown},
-		{false, "HTTP /1.1 200 OK\r\n\r\n", httpMethodNotFound},
-	}
-
-	for _, tc := range testCases {
-		msg := buildMessage(buildPacket(tc.direction, 1, 1, []byte(tc.payload), time.Now()))
-
-		if msg.methodType != tc.expectedMethodType {
-			t.Errorf("Expected %d, got %d", tc.expectedMethodType, msg.methodType)
-		}
-	}
-}
-
-func TestTCPMessageBodyType(t *testing.T) {
-	testCases := []struct {
-		direction        bool
-		payload          string
-		expectedBodyType httpBodyType
-	}{
-		{true, "GET / HTTP/1.1\r\n\r\n", httpBodyEmpty},
-		{true, "GET / HTTP/1.1\r\nContent-Length: 2\r\n\r\nab", httpBodyContentLength},
-		{true, "POST / HTTP/1.1\r\n\r\n", httpBodyEmpty},
-		{true, "POST / HTTP/1.1\r\nUser-Agent: zxc\r\n\r\n", httpBodyEmpty},
-		{false, "HTTP/1.1 200 OK\r\n\r\n", httpBodyEmpty},
-		{true, "POST / HTTP/1.1\r\nContent-Length: 2\r\n\r\nab", httpBodyContentLength},
-		{false, "HTTP/1.1 200 OK\r\nContent-Length: 2\r\n\r\nab", httpBodyContentLength},
-		{true, "POST / HTTP/1.1\r\nTransfer-Encoding: chunked\r\n\r\n2\r\nab\r\n0\r\n\r\n", httpBodyChunked},
-		{false, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n2\r\nab\r\n0\r\n\r\n", httpBodyChunked},
-	}
-
-	for _, tc := range testCases {
-		msg := buildMessage(buildPacket(tc.direction, 1, 1, []byte(tc.payload), time.Now()))
-
-		if msg.bodyType != tc.expectedBodyType {
-			t.Errorf("Expected %d, got %d", tc.expectedBodyType, msg.bodyType)
-		}
-	}
-}
-
-func TestTCPMessageBodySize(t *testing.T) {
-	testCases := []struct {
-		direction    bool
-		payloads     []string
-		expectedSize int
-	}{
-		{true, []string{"GET / HTTP/1.1\r\n\r\n"}, 0},
-		{true, []string{"POST / HTTP/1.1\r\nContent-Length: 2\r\n\r\nab"}, 2},
-		{true, []string{"GET / HTTP/1.1\r\n", "Content-Length: 2\r\n\r\nab"}, 2},
-		{true, []string{"GET / HTTP/1.1\r\n", "Content-Length: 2\r\n\r\n", "ab"}, 2},
-	}
-
-	for _, tc := range testCases {
-		msg := buildMessage(buildPacket(tc.direction, 1, 1, []byte(tc.payloads[0]), time.Now()))
-
-		if len(tc.payloads) > 1 {
-			for _, p := range tc.payloads[1:] {
-				seq := uint32(1 + msg.Size())
-				msg.AddPacket(buildPacket(tc.direction, 1, seq, []byte(p), time.Now()))
-			}
-		}
-
-		if msg.BodySize() != tc.expectedSize {
-			t.Errorf("Expected %d, got %d", tc.expectedSize, msg.BodySize())
-		}
-	}
-}
-
-func TestTcpMessageStart(t *testing.T) {
-	start := time.Now().Add(-1 * time.Second)
-
-	msg := buildMessage(buildPacket(true, 1, 2, []byte("b"), time.Now()))
-	msg.AddPacket(buildPacket(true, 1, 1, []byte("POST / HTTP/1.1\r\nContent-Length: 2\r\n\r\na"), start))
-
-	if msg.Start != start {
-		t.Error("Message timestamp should be equal to the lowest related packet timestamp", start, msg.Start)
-	}
-}

capture/tcp_packet.go

@@ -1,129 +0,0 @@
-package capture
-
-import (
-	"encoding/binary"
-	"strconv"
-	"strings"
-	"time"
-)
-
-// TCP Flags
-const (
-	fFIN = 1 << iota
-	fSYN
-	fRST
-	fPSH
-	fACK
-	fURG
-	fECE
-	fCWR
-	fNS
-)
-
-type tcpID [24]byte
-
-// TCPPacket provides tcp packet parser
-// Packet structure: http://en.wikipedia.org/wiki/Transmission_Control_Protocol
-type TCPPacket struct {
-	SrcPort    uint16
-	DestPort   uint16
-	Seq        uint32
-	Ack        uint32
-	OrigAck    uint32
-	DataOffset uint8
-	IsFIN      bool
-
-	Raw       []byte
-	Data      []byte
-	Addr      []byte
-	timestamp time.Time
-	ID        tcpID
-}
-
-// ParseTCPPacket takes address and tcp payload and returns parsed TCPPacket
-func ParseTCPPacket(addr []byte, data []byte, timestamp time.Time) (p *TCPPacket) {
-	p = &TCPPacket{Raw: data}
-	p.ParseBasic()
-	p.Addr = addr
-	p.timestamp = timestamp
-	p.GenID()
-
-	return
-}
-
-func (p *TCPPacket) GenID() {
-	copy(p.ID[:16], p.Addr)
-	copy(p.ID[16:], p.Raw[0:2])  // Src port
-	copy(p.ID[18:], p.Raw[2:4])  // Dest port
-	copy(p.ID[20:], p.Raw[8:12]) // Ack
-}
-
-func (p *TCPPacket) UpdateAck(ack uint32) {
-	p.OrigAck = p.Ack
-	p.Ack = ack
-	binary.BigEndian.PutUint32(p.Raw[8:12], ack)
-	p.GenID()
-}
-
-// ParseBasic set of fields
-func (t *TCPPacket) ParseBasic() {
-	t.DestPort = binary.BigEndian.Uint16(t.Raw[2:4])
-	t.SrcPort = binary.BigEndian.Uint16(t.Raw[0:2])
-	t.Seq = binary.BigEndian.Uint32(t.Raw[4:8])
-	t.Ack = binary.BigEndian.Uint32(t.Raw[8:12])
-	t.DataOffset = (t.Raw[12] & 0xF0) >> 4
-	t.IsFIN = t.Raw[13]&0x01 != 0
-
-	if len(t.Raw) >= int(t.DataOffset*4) {
-		t.Data = t.Raw[t.DataOffset*4:]
-	}
-}
-
-func (t *TCPPacket) dump() *packet {
-
-	packetSrcIP := make([]byte, 16)
-	packetData := make([]byte, len(t.Data)+16)
-
-	copy(packetSrcIP, t.Addr)
-
-	binary.BigEndian.PutUint16(packetData[0:2], t.SrcPort)
-	binary.BigEndian.PutUint16(packetData[2:4], t.DestPort)
-
-	binary.BigEndian.PutUint32(packetData[4:8], t.Seq)
-	binary.BigEndian.PutUint32(packetData[8:12], t.Ack)
-
-	packetData[12] = 64
-
-	if t.IsFIN {
-		packetData[13] = packetData[13] | 0x01
-	}
-
-	copy(packetData[16:], t.Data)
-	return &packet{
-		srcIP:     packetSrcIP,
-		data:      packetData,
-		timestamp: t.timestamp,
-	}
-
-}
-
-// String output for a TCP Packet
-func (t *TCPPacket) String() string {
-	maxLen := len(t.Data)
-	if maxLen > 200 {
-		maxLen = 200
-	}
-
-	return strings.Join([]string{
-		"Addr: " + string(t.Addr),
-		"Source port: " + strconv.Itoa(int(t.SrcPort)),
-		"Dest port:" + strconv.Itoa(int(t.DestPort)),
-		"Sequence:" + strconv.Itoa(int(t.Seq)),
-		"Acknowledgment:" + strconv.Itoa(int(t.Ack)),
-		"Header len:" + strconv.Itoa(int(t.DataOffset)),
-		"FIN:" + strconv.FormatBool(t.IsFIN),
-
-		"Data size:" + strconv.Itoa(len(t.Data)),
-		"Data:" + string(t.Data[:maxLen]),
-	}, "\n")
-}

elasticsearch.go

@@ -69,7 +69,7 @@ func parseURI(URI string) (err error, index string) {
 		return
 	}
 
-	//	check URL validity by extracting host and undex values.
+	//	check URL validity by extracting host and index values.
 	host := parsedUrl.Host
 	urlPathParts := strings.Split(parsedUrl.Path, "/")
 	index = urlPathParts[len(urlPathParts)-1]
@@ -99,13 +99,9 @@ func (p *ESPlugin) Init(URI string) {
 	p.done = make(chan bool)
 	p.indexor.Start()
 
-	if Settings.verbose {
-		// Only start the ErrorHandler goroutine when in verbose mode
-		// no need to burn ressources otherwise
-		go p.ErrorHandler()
-	}
+	go p.ErrorHandler()
 
-	log.Println("Initialized Elasticsearch Plugin")
+	Debug(1, "Initialized Elasticsearch Plugin")
 	return
 }
 
@@ -117,7 +113,7 @@ func (p *ESPlugin) IndexerShutdown() {
 func (p *ESPlugin) ErrorHandler() {
 	for {
 		errBuf := <-p.indexor.ErrorChannel
-		log.Println(errBuf.Err)
+		Debug(1, "[ELASTICSEARCH]", errBuf.Err)
 	}
 }
 
@@ -128,6 +124,7 @@ func (p *ESPlugin) RttDurationToMs(d time.Duration) int64 {
 	return int64(fl)
 }
 
+// ResponseAnalyze send req and resp to ES
 func (p *ESPlugin) ResponseAnalyze(req, resp []byte, start, stop time.Time) {
 	if len(resp) == 0 {
 		// nil http response - skipped elasticsearch export for this request
@@ -135,7 +132,6 @@ func (p *ESPlugin) ResponseAnalyze(req, resp []byte, start, stop time.Time) {
 	}
 	t := time.Now()
 	rtt := p.RttDurationToMs(stop.Sub(start))
-	req = payloadBody(req)
 
 	esResp := ESRequestResponse{
 		ReqURL:               string(proto.Path(req)),
@@ -163,7 +159,7 @@ func (p *ESPlugin) ResponseAnalyze(req, resp []byte, start, stop time.Time) {
 	}
 	j, err := json.Marshal(&esResp)
 	if err != nil {
-		log.Println(err)
+		Debug(0, "[ELASTIC-RESPONSE]", err)
 	} else {
 		p.indexor.Index(p.Index, "RequestResponse", "", "", "", &t, j)
 	}

elasticsearch_test.go

@@ -42,7 +42,7 @@ func TestElasticConnectionBuildFailWithoutScheme(t *testing.T) {
 	assertExpectedError(err, t)
 }
 
-// Argument scheme://host:port
+// Argument scheme://Host:port
 // i.e : http://localhost:9200
 // Fail : explicit index is required
 func TestElasticConnectionBuildFailWithoutIndex(t *testing.T) {
@@ -55,7 +55,7 @@ func TestElasticConnectionBuildFailWithoutIndex(t *testing.T) {
 	assertExpectedError(err, t)
 }
 
-// Argument scheme://host/index_name
+// Argument scheme://Host/index_name
 // i.e : http://localhost/gor
 func TestElasticConnectionBuildFailWithoutPort(t *testing.T) {
 	uri := "http://localhost/" + expectedIndex
@@ -67,7 +67,7 @@ func TestElasticConnectionBuildFailWithoutPort(t *testing.T) {
 	assertExpectedGorIndex(index, t)
 }
 
-// Argument scheme://host:port/index_name
+// Argument scheme://Host:port/index_name
 // i.e : http://localhost:9200/gor
 func TestElasticLocalConnectionBuild(t *testing.T) {
 	uri := "http://localhost:9200/" + expectedIndex
@@ -79,7 +79,7 @@ func TestElasticLocalConnectionBuild(t *testing.T) {
 	assertExpectedGorIndex(index, t)
 }
 
-// Argument scheme://host:port/index_name
+// Argument scheme://Host:port/index_name
 // i.e : http://localhost.local:9200/gor or https://localhost.local:9200/gor
 func TestElasticSimpleLocalWithSchemeConnectionBuild(t *testing.T) {
 	uri := "http://localhost.local:9200/" + expectedIndex
@@ -91,7 +91,7 @@ func TestElasticSimpleLocalWithSchemeConnectionBuild(t *testing.T) {
 	assertExpectedGorIndex(index, t)
 }
 
-// Argument scheme://host:port/index_name
+// Argument scheme://Host:port/index_name
 // i.e : http://localhost.local:9200/gor or https://localhost.local:9200/gor
 func TestElasticSimpleLocalWithHTTPSConnectionBuild(t *testing.T) {
 	uri := "https://localhost.local:9200/" + expectedIndex
@@ -103,7 +103,7 @@ func TestElasticSimpleLocalWithHTTPSConnectionBuild(t *testing.T) {
 	assertExpectedGorIndex(index, t)
 }
 
-// Argument scheme://host:port/index_name
+// Argument scheme://Host:port/index_name
 // i.e : localhost.local:9200/pathtoElastic/gor
 func TestElasticLongPathConnectionBuild(t *testing.T) {
 	uri := "http://localhost.local:9200/pathtoElastic/" + expectedIndex
@@ -115,7 +115,7 @@ func TestElasticLongPathConnectionBuild(t *testing.T) {
 	assertExpectedGorIndex(index, t)
 }
 
-// Argument scheme://host:userinfo@port/index_name
+// Argument scheme://Host:userinfo@port/index_name
 // i.e : http://user:password@localhost.local:9200/gor
 func TestElasticBasicAuthConnectionBuild(t *testing.T) {
 	uri := "http://user:password@localhost.local:9200/" + expectedIndex
@@ -127,7 +127,7 @@ func TestElasticBasicAuthConnectionBuild(t *testing.T) {
 	assertExpectedGorIndex(index, t)
 }
 
-// Argument scheme://host:port/path/index_name
+// Argument scheme://Host:port/path/index_name
 // i.e : http://localhost.local:9200/path/gor or https://localhost.local:9200/path/gor
 func TestElasticComplexPathConnectionBuild(t *testing.T) {
 	uri := "http://localhost.local:9200/path/" + expectedIndex

emitter.go

@@ -1,30 +1,36 @@
 package main
 
 import (
-	"bytes"
+	"fmt"
 	"hash/fnv"
 	"io"
 	"log"
+	"runtime"
 	"sync"
 	"time"
+
+	"github.com/buger/goreplay/byteutils"
+
+	"github.com/pbnjay/memory"
 )
 
-type emitter struct {
+// Emitter represents an abject to manage plugins communication
+type Emitter struct {
 	sync.WaitGroup
-	quit chan int
+	plugins *InOutPlugins
 }
 
-// NewEmitter creates and initializes new `emitter` object.
-func NewEmitter(quit chan int) *emitter {
-	return &emitter{
-		quit: quit,
-	}
+// NewEmitter creates and initializes new Emitter object.
+func NewEmitter() *Emitter {
+	return &Emitter{}
 }
 
 // Start initialize loop for sending data from inputs to outputs
-func (e *emitter) Start(plugins *InOutPlugins, middlewareCmd string) {
-	e.Add(1)
-	defer e.Done()
+func (e *Emitter) Start(plugins *InOutPlugins, middlewareCmd string) {
+	if Settings.CopyBufferSize < 1 {
+		Settings.CopyBufferSize = 5 << 20
+	}
+	e.plugins = plugins
 
 	if middlewareCmd != "" {
 		middleware := NewMiddleware(middlewareCmd)
@@ -33,212 +39,166 @@ func (e *emitter) Start(plugins *InOutPlugins, middlewareCmd string) {
 			middleware.ReadFrom(in)
 		}
 
-		// We are going only to read responses, so using same ReadFrom method
-		for _, out := range plugins.Outputs {
-			if r, ok := out.(io.Reader); ok {
-				middleware.ReadFrom(r)
-			}
-		}
+		e.plugins.Inputs = append(e.plugins.Inputs, middleware)
+		e.plugins.All = append(e.plugins.All, middleware)
 		e.Add(1)
 		go func() {
 			defer e.Done()
-			if err := CopyMulty(e.quit, middleware, plugins.Outputs...); err != nil {
-				log.Println("Error during copy: ", err)
-				e.close()
-			}
-		}()
-		go func() {
-			for {
-				select {
-				case <-e.quit:
-					middleware.Close()
-					return
-				}
+			if err := CopyMulty(middleware, plugins.Outputs...); err != nil {
+				Debug(2, fmt.Sprintf("[EMITTER] error during copy: %q", err))
 			}
 		}()
 	} else {
 		for _, in := range plugins.Inputs {
 			e.Add(1)
-			go func(in io.Reader) {
+			go func(in PluginReader) {
 				defer e.Done()
-				if err := CopyMulty(e.quit, in, plugins.Outputs...); err != nil {
-					log.Println("Error during copy: ", err)
-					e.close()
+				if err := CopyMulty(in, plugins.Outputs...); err != nil {
+					Debug(2, fmt.Sprintf("[EMITTER] error during copy: %q", err))
 				}
 			}(in)
 		}
-
-		for _, out := range plugins.Outputs {
-			if r, ok := out.(io.Reader); ok {
-				e.Add(1)
-				go func(r io.Reader) {
-					defer e.Done()
-					if err := CopyMulty(e.quit, r, plugins.Outputs...); err != nil {
-						log.Println("Error during copy: ", err)
-						e.close()
-					}
-				}(r)
-			}
-		}
-	}
-
-	for {
-		select {
-		case <-e.quit:
-			finalize(plugins)
-			return
-		case <-time.After(100 * time.Millisecond):
-		}
-	}
-}
-
-func (e *emitter) close() {
-	select {
-	case <-e.quit:
-	default:
-		close(e.quit)
 	}
 }
 
 // Close closes all the goroutine and waits for it to finish.
-func (e *emitter) Close() {
-	e.close()
-	e.Wait()
+func (e *Emitter) Close() {
+	fmt.Println("Closing!")
+	for _, p := range e.plugins.All {
+		if cp, ok := p.(io.Closer); ok {
+			cp.Close()
+		}
+	}
+	if len(e.plugins.All) > 0 {
+		// wait for everything to stop
+		e.Wait()
+	}
+
+	fmt.Println("Closed!")
+	e.plugins.All = nil // avoid Close to make changes again
 }
 
 // CopyMulty copies from 1 reader to multiple writers
-func CopyMulty(stop chan int, src io.Reader, writers ...io.Writer) error {
-	buf := make([]byte, Settings.copyBufferSize)
+func CopyMulty(src PluginReader, writers ...PluginWriter) error {
 	wIndex := 0
-	modifier := NewHTTPModifier(&Settings.modifierConfig)
-	filteredRequests := make(map[string]time.Time)
-	filteredRequestsLastCleanTime := time.Now()
+	modifier := NewHTTPModifier(&Settings.ModifierConfig)
+	filteredRequests := make(map[string]int64)
+	filteredRequestsLastCleanTime := time.Now().UnixNano()
+	filteredCount := 0
 
-	i := 0
 	for {
-		var nr int
-		nr, err := src.Read(buf)
-
-		select {
-		case <-stop:
-			return nil
-		default:
-		}
-
-		if err == io.EOF || err == ErrorStopped {
-			return nil
-		}
+		msg, err := src.PluginRead()
 		if err != nil {
+			if err == ErrorStopped || err == io.EOF {
+				return nil
+			}
 			return err
 		}
 
-		_maxN := nr
-		if nr > 500 {
-			_maxN = 500
-		}
-		if nr > 0 && len(buf) > nr {
-			payload := buf[:nr]
-			meta := payloadMeta(payload)
+		if msg != nil && len(msg.Data) > 0 {
+			if len(msg.Data) > int(Settings.CopyBufferSize) {
+				msg.Data = msg.Data[:Settings.CopyBufferSize]
+			}
+			meta := payloadMeta(msg.Meta)
 			if len(meta) < 3 {
-				if Settings.debug {
-					Debug("[EMITTER] Found malformed record", string(payload[0:_maxN]), nr, "from:", src)
-				}
+				Debug(2, fmt.Sprintf("[EMITTER] Found malformed record %q from %q", msg.Meta, src))
 				continue
 			}
-			requestID := string(meta[1])
-
-			if nr >= 5*1024*1024 {
-				log.Println("INFO: Large packet... We received ", len(payload), " bytes from ", src)
+			requestID := byteutils.SliceToString(meta[1])
+			// start a subroutine only when necessary
+			if Settings.Verbose >= 3 {
+				Debug(3, "[EMITTER] input: ", byteutils.SliceToString(msg.Meta[:len(msg.Meta)-1]), " from: ", src)
 			}
-
-			if Settings.debug {
-				Debug("[EMITTER] input:", string(payload[0:_maxN]), nr, "from:", src)
-			}
-
 			if modifier != nil {
-				if isRequestPayload(payload) {
-					headSize := bytes.IndexByte(payload, '\n') + 1
-					body := payload[headSize:]
-					originalBodyLen := len(body)
-					body = modifier.Rewrite(body)
-
+				Debug(3, "[EMITTER] modifier:", requestID, "from:", src)
+				if isRequestPayload(msg.Meta) {
+					msg.Data = modifier.Rewrite(msg.Data)
 					// If modifier tells to skip request
-					if len(body) == 0 {
-						filteredRequests[requestID] = time.Now()
+					if len(msg.Data) == 0 {
+						filteredRequests[requestID] = time.Now().UnixNano()
+						filteredCount++
 						continue
 					}
+					Debug(3, "[EMITTER] Rewritten input:", requestID, "from:", src)
 
-					if originalBodyLen != len(body) {
-						payload = append(payload[:headSize], body...)
-					}
-
-					if Settings.debug {
-						Debug("[EMITTER] Rewritten input:", len(payload), "First 500 bytes:", string(payload[0:_maxN]))
-					}
 				} else {
 					if _, ok := filteredRequests[requestID]; ok {
 						delete(filteredRequests, requestID)
+						filteredCount--
 						continue
 					}
 				}
 			}
 
-			if Settings.prettifyHTTP {
-				payload = prettifyHTTP(payload)
-				if len(payload) == 0 {
+			if Settings.PrettifyHTTP {
+				msg.Data = prettifyHTTP(msg.Data)
+				if len(msg.Data) == 0 {
 					continue
 				}
 			}
 
-			if Settings.splitOutput {
-				if Settings.recognizeTCPSessions {
+			if Settings.SplitOutput {
+				if Settings.RecognizeTCPSessions {
 					if !PRO {
 						log.Fatal("Detailed TCP sessions work only with PRO license")
 					}
 					hasher := fnv.New32a()
-					// First 20 bytes contain tcp session
-					id := payloadID(payload)
-					hasher.Write(id[:20])
+					hasher.Write(meta[1])
 
 					wIndex = int(hasher.Sum32()) % len(writers)
-					writers[wIndex].Write(payload)
+					if _, err := writers[wIndex].PluginWrite(msg); err != nil {
+						return err
+					}
 				} else {
 					// Simple round robin
-					if _, err := writers[wIndex].Write(payload); err != nil {
+					if _, err := writers[wIndex].PluginWrite(msg); err != nil {
 						return err
 					}
 
-					wIndex++
-
-					if wIndex >= len(writers) {
-						wIndex = 0
-					}
+					wIndex = (wIndex + 1) % len(writers)
 				}
 			} else {
 				for _, dst := range writers {
-					if _, err := dst.Write(payload); err != nil {
+					if _, err := dst.PluginWrite(msg); err != nil {
 						return err
 					}
 				}
 			}
-		} else if nr > 0 {
-			log.Println("WARN: Packet", nr, "bytes is too large to process. Consider increasing --copy-buffer-size")
 		}
 
 		// Run GC on each 1000 request
-		if i%1000 == 0 {
+		if filteredCount > 0 && filteredCount%1000 == 0 {
 			// Clean up filtered requests for which we didn't get a response to filter
-			now := time.Now()
-			if now.Sub(filteredRequestsLastCleanTime) > 60*time.Second {
+			now := time.Now().UnixNano()
+			if now-filteredRequestsLastCleanTime > int64(60*time.Second) {
 				for k, v := range filteredRequests {
-					if now.Sub(v) > 60*time.Second {
+					if now-v > int64(60*time.Second) {
 						delete(filteredRequests, k)
+						filteredCount--
 					}
 				}
-				filteredRequestsLastCleanTime = time.Now()
+				filteredRequestsLastCleanTime = time.Now().UnixNano()
 			}
 		}
-
-		i++
 	}
 }
+
+func memUsage() (uint64, uint64) {
+	var m runtime.MemStats
+	runtime.ReadMemStats(&m)
+	// fmt.Printf("Current memory usage: ")
+	// // For info on each, see: https://golang.org/pkg/runtime/#MemStats
+	// fmt.Printf("Alloc = %v MiB", bToMb(m.Alloc))
+	// fmt.Printf("\tTotalAlloc = %v MiB", bToMb(m.TotalAlloc))
+	// fmt.Printf("\tSys = %v MiB", bToMb(m.Sys))
+	// fmt.Printf("\tNumGC = %v\n", m.NumGC)
+
+	// fmt.Printf("Total available memory %v MiB\n", bToMb(memory.TotalMemory()))
+	// fmt.Printf("Currently using %.2f %% of memory\n", 100*float64(m.Alloc+m.Sys)/float64(memory.TotalMemory()))
+
+	return m.Alloc + m.Sys, memory.TotalMemory()
+}
+
+func bToMb(b uint64) uint64 {
+	return b / 1024 / 1024
+}

emitter_test.go

@@ -1,8 +1,7 @@
 package main
 
 import (
-	"bytes"
-	"io"
+	"fmt"
 	"os"
 	"sync"
 	"sync/atomic"
@@ -18,21 +17,20 @@ func TestMain(m *testing.M) {
 
 func TestEmitter(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
-	output := NewTestOutput(func(data []byte) {
+	output := NewTestOutput(func(*Message) {
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	for i := 0; i < 1000; i++ {
 		wg.Add(1)
@@ -45,32 +43,31 @@ func TestEmitter(t *testing.T) {
 
 func TestEmitterFiltered(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
 	input.skipHeader = true
 
-	output := NewTestOutput(func(data []byte) {
+	output := NewTestOutput(func(*Message) {
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
 	methods := HTTPMethods{[]byte("GET")}
-	Settings.modifierConfig = HTTPModifierConfig{methods: methods}
+	Settings.ModifierConfig = HTTPModifierConfig{Methods: methods}
 
-	emitter := &emitter{quit: quit}
+	emitter := &Emitter{}
 	go emitter.Start(plugins, "")
 
 	wg.Add(2)
 
 	id := uuid()
 	reqh := payloadHeader(RequestPayload, id, time.Now().UnixNano(), -1)
-	reqb := append(reqh, []byte("GET / HTTP/1.1\r\nHost: www.w3.org\r\nUser-Agent: Go 1.1 package http\r\nAccept-Encoding: gzip\r\n\r\n")...)
+	reqb := append(reqh, []byte("POST / HTTP/1.1\r\nHost: www.w3.org\r\nUser-Agent: Go 1.1 package http\r\nAccept-Encoding: gzip\r\n\r\n")...)
 
 	resh := payloadHeader(ResponsePayload, id, time.Now().UnixNano()+1, 1)
 	respb := append(resh, []byte("HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n")...)
@@ -80,7 +77,7 @@ func TestEmitterFiltered(t *testing.T) {
 
 	id = uuid()
 	reqh = payloadHeader(RequestPayload, id, time.Now().UnixNano(), -1)
-	reqb = append(reqh, []byte("POST / HTTP/1.1\r\nHost: www.w3.org\r\nUser-Agent: Go 1.1 package http\r\nAccept-Encoding: gzip\r\n\r\n")...)
+	reqb = append(reqh, []byte("GET / HTTP/1.1\r\nHost: www.w3.org\r\nUser-Agent: Go 1.1 package http\r\nAccept-Encoding: gzip\r\n\r\n")...)
 
 	resh = payloadHeader(ResponsePayload, id, time.Now().UnixNano()+1, 1)
 	respb = append(resh, []byte("HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n")...)
@@ -91,36 +88,35 @@ func TestEmitterFiltered(t *testing.T) {
 	wg.Wait()
 	emitter.Close()
 
-	Settings.modifierConfig = HTTPModifierConfig{}
+	Settings.ModifierConfig = HTTPModifierConfig{}
 }
 
 func TestEmitterSplitRoundRobin(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
 
 	var counter1, counter2 int32
 
-	output1 := NewTestOutput(func(data []byte) {
+	output1 := NewTestOutput(func(*Message) {
 		atomic.AddInt32(&counter1, 1)
 		wg.Done()
 	})
 
-	output2 := NewTestOutput(func(data []byte) {
+	output2 := NewTestOutput(func(*Message) {
 		atomic.AddInt32(&counter2, 1)
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output1, output2},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output1, output2},
 	}
 
-	Settings.splitOutput = true
+	Settings.SplitOutput = true
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	for i := 0; i < 1000; i++ {
 		wg.Add(1)
@@ -135,37 +131,36 @@ func TestEmitterSplitRoundRobin(t *testing.T) {
 		t.Errorf("Round robin should split traffic equally: %d vs %d", counter1, counter2)
 	}
 
-	Settings.splitOutput = false
+	Settings.SplitOutput = false
 }
 
 func TestEmitterRoundRobin(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
 
 	var counter1, counter2 int32
 
-	output1 := NewTestOutput(func(data []byte) {
-		atomic.AddInt32(&counter1, 1)
+	output1 := NewTestOutput(func(*Message) {
+		counter1++
 		wg.Done()
 	})
 
-	output2 := NewTestOutput(func(data []byte) {
-		atomic.AddInt32(&counter2, 1)
+	output2 := NewTestOutput(func(*Message) {
+		counter2++
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output1, output2},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output1, output2},
 	}
 	plugins.All = append(plugins.All, input, output1, output2)
 
-	Settings.splitOutput = true
+	Settings.SplitOutput = true
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	for i := 0; i < 1000; i++ {
 		wg.Add(1)
@@ -179,97 +174,82 @@ func TestEmitterRoundRobin(t *testing.T) {
 		t.Errorf("Round robin should split traffic equally: %d vs %d", counter1, counter2)
 	}
 
-	Settings.splitOutput = false
+	Settings.SplitOutput = false
 }
 
 func TestEmitterSplitSession(t *testing.T) {
-	wg1 := new(sync.WaitGroup)
-	wg2 := new(sync.WaitGroup)
-	wg1.Add(1000)
-	wg2.Add(1000)
-
-	// Base uuids, only 1 letter changed
-	uuid1 := []byte("1234567890123456789a0000")
-	uuid2 := []byte("1234567890123456789d0000")
-
-	quit := make(chan int)
+	wg := new(sync.WaitGroup)
+	wg.Add(200)
 
 	input := NewTestInput()
 	input.skipHeader = true
 
 	var counter1, counter2 int32
 
-	output1 := NewTestOutput(func(data []byte) {
-		atomic.AddInt32(&counter1, 1)
-		if !bytes.Equal(uuid1[:20], payloadID(data)[:20]) {
-			t.Errorf("All tcp sessions should have same id")
+	output1 := NewTestOutput(func(msg *Message) {
+		if payloadID(msg.Meta)[0] == 'a' {
+			counter1++
 		}
-
-		wg1.Done()
+		wg.Done()
 	})
 
-	output2 := NewTestOutput(func(data []byte) {
-		atomic.AddInt32(&counter2, 1)
-		if !bytes.Equal(uuid2[:20], payloadID(data)[:20]) {
-			t.Errorf("All tcp sessions should have same id")
+	output2 := NewTestOutput(func(msg *Message) {
+		if payloadID(msg.Meta)[0] == 'b' {
+			counter2++
 		}
-
-		wg2.Done()
+		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output1, output2},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output1, output2},
 	}
 
-	Settings.splitOutput = true
-	Settings.recognizeTCPSessions = true
+	Settings.SplitOutput = true
+	Settings.RecognizeTCPSessions = true
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
-	for i := 0; i < 1000; i++ {
-		// Keep session but randomize ACK
-		copy(uuid1[20:], randByte(4))
-		input.EmitBytes([]byte("1 " + string(uuid1) + " 1\n" + "GET / HTTP/1.1\r\n\r\n"))
+	for i := 0; i < 200; i++ {
+		// Keep session but randomize
+		id := make([]byte, 20)
+		if i&1 == 0 { // for recognizeTCPSessions one should be odd and other will be even number
+			id[0] = 'a'
+		} else {
+			id[0] = 'b'
+		}
+		input.EmitBytes([]byte(fmt.Sprintf("1 %s 1 1\nGET / HTTP/1.1\r\n\r\n", id[:20])))
 	}
 
-	for i := 0; i < 1000; i++ {
-		// Keep session but randomize ACK
-		copy(uuid2[20:], randByte(4))
-		input.EmitBytes([]byte("1 " + string(uuid2) + " 1\n" + "GET / HTTP/1.1\r\n\r\n"))
-	}
+	wg.Wait()
 
-	wg1.Wait()
-	wg2.Wait()
-
-	if counter1 != 1000 || counter2 != 1000 {
+	if counter1 != counter2 {
 		t.Errorf("Round robin should split traffic equally: %d vs %d", counter1, counter2)
 	}
 
-	Settings.splitOutput = false
-	Settings.recognizeTCPSessions = false
+	Settings.SplitOutput = false
+	Settings.RecognizeTCPSessions = false
 	emitter.Close()
 }
 
 func BenchmarkEmitter(b *testing.B) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
 
-	output := NewTestOutput(func(data []byte) {
+	output := NewTestOutput(func(*Message) {
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	b.ResetTimer()
 

examples/middleware/echo.sh

@@ -8,8 +8,10 @@
 # 
 
 function log {
+    if [[ ! -v GOR_TEST ]]; then # if we are not testing
     # Logging to stderr, because stdout/stdin used for data transfer
     >&2 echo "[DEBUG][ECHO] $1"
+    fi
 }
 
 while read line; do

examples/middleware/token_modifier.go

@@ -115,6 +115,8 @@ func encode(buf []byte) []byte {
 }
 
 func Debug(args ...interface{}) {
-	fmt.Fprint(os.Stderr, "[DEBUG][TOKEN-MOD] ")
-	fmt.Fprintln(os.Stderr, args...)
+	if os.Getenv("GOR_TEST") == "" { // if we are not testing
+		fmt.Fprint(os.Stderr, "[DEBUG][TOKEN-MOD] ")
+		fmt.Fprintln(os.Stderr, args...)
+	}
 }

go.mod

@@ -5,15 +5,17 @@ go 1.14
 require (
 	github.com/Shopify/sarama v1.26.4
 	github.com/araddon/gou v0.0.0-20190110011759-c797efecbb61 // indirect
-	github.com/aws/aws-sdk-go v1.32.7
+	github.com/aws/aws-sdk-go v1.33.2
 	github.com/bitly/go-hostpool v0.1.0 // indirect
 	github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 // indirect
-	github.com/google/gopacket v1.1.17
+	github.com/google/gopacket v1.1.18
 	github.com/klauspost/compress v1.10.10 // indirect
 	github.com/mattbaird/elastigo v0.0.0-20170123220020-2fe47fd29e4b
+	github.com/pbnjay/memory v0.0.0-20201129165224-b12e5d931931
 	github.com/pierrec/lz4 v2.5.2+incompatible // indirect
 	github.com/rcrowley/go-metrics v0.0.0-20200313005456-10cdbea86bc0 // indirect
 	github.com/smartystreets/goconvey v1.6.4 // indirect
-	golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 // indirect
-	golang.org/x/net v0.0.0-20200602114024-627f9648deb9 // indirect
+	github.com/stretchr/testify v1.5.1
+	golang.org/x/net v0.0.0-20200707034311-ab3426394381 // indirect
+	golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd
 )

go.sum

@@ -4,13 +4,12 @@ github.com/Shopify/toxiproxy v2.1.4+incompatible h1:TKdv8HiTLgE5wdJuEML90aBgNWso
 github.com/Shopify/toxiproxy v2.1.4+incompatible/go.mod h1:OXgGpZ6Cli1/URJOF1DMxUHB2q5Ap20/P/eIdh4G0pI=
 github.com/araddon/gou v0.0.0-20190110011759-c797efecbb61 h1:Xz25cuW4REGC5W5UtpMU3QItMIImag615HiQcRbxqKQ=
 github.com/araddon/gou v0.0.0-20190110011759-c797efecbb61/go.mod h1:ikc1XA58M+Rx7SEbf0bLJCfBkwayZ8T5jBo5FXK8Uz8=
-github.com/aws/aws-sdk-go v1.32.7 h1:H4VgdCSF1cHw0VD8zGc98T1bGdACoLkh/vK2L6wgOUU=
-github.com/aws/aws-sdk-go v1.32.7/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
+github.com/aws/aws-sdk-go v1.33.2 h1:8TVrnPnSD7I+AmDp66xBUvS3K0J+jH09YXdrkJ34ey0=
+github.com/aws/aws-sdk-go v1.33.2/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
 github.com/bitly/go-hostpool v0.1.0 h1:XKmsF6k5el6xHG3WPJ8U0Ku/ye7njX7W81Ng7O2ioR0=
 github.com/bitly/go-hostpool v0.1.0/go.mod h1:4gOCgp6+NZnVqlKyZ/iBZFTAJKembaVENUpMkpg42fw=
 github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 h1:DDGfHa7BWjL4YnC6+E63dPcxHo2sUxDIu8g3QgEJdRY=
 github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869/go.mod h1:Ekp36dRnpXw/yCqJaO+ZrUyxD+3VXMFFr56k5XYrpB4=
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -30,8 +29,8 @@ github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEW
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
 github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
-github.com/google/gopacket v1.1.17 h1:rMrlX2ZY2UbvT+sdz3+6J+pp2z+msCq9MxTU6ymxbBY=
-github.com/google/gopacket v1.1.17/go.mod h1:UdDNZ1OO62aGYVnPhxT1U6aI7ukYtA/kB8vaU0diBUM=
+github.com/google/gopacket v1.1.18 h1:lum7VRA9kdlvBi7/v2p7/zcbkduHaCH/SVVyurs7OpY=
+github.com/google/gopacket v1.1.18/go.mod h1:UdDNZ1OO62aGYVnPhxT1U6aI7ukYtA/kB8vaU0diBUM=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
 github.com/hashicorp/go-uuid v1.0.2 h1:cfejS+Tpcp13yd5nYHWDI6qVCny6wyX2Mt5SGur2IGE=
@@ -42,7 +41,6 @@ github.com/jmespath/go-jmespath v0.3.0 h1:OS12ieG61fsCg5+qLJ+SsW9NicxNkg3b25OyT2
 github.com/jmespath/go-jmespath v0.3.0/go.mod h1:9QtRXoHjLGCJ5IBSaohpXITPlowMeeYCZ7fLUTSywik=
 github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
-github.com/klauspost/compress v1.9.8 h1:VMAMUUOh+gaxKTMk+zqbjsSjsIcUcL/LF4o63i82QyA=
 github.com/klauspost/compress v1.9.8/go.mod h1:RyIbtBH6LamlWaDj8nUwkbUhJ87Yi3uG0guNDohfE1A=
 github.com/klauspost/compress v1.10.10 h1:a/y8CglcM7gLGYmlbP/stPE5sR3hbhFRUjCBfd/0B3I=
 github.com/klauspost/compress v1.10.10/go.mod h1:aoV0uJVorq1K+umq18yTdKaF57EivdYsUV+/s2qKfXs=
@@ -54,6 +52,8 @@ github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/mattbaird/elastigo v0.0.0-20170123220020-2fe47fd29e4b h1:v29yPGHhOqw7VHEnTeQFAth3SsBrmwc8JfuhNY0G34k=
 github.com/mattbaird/elastigo v0.0.0-20170123220020-2fe47fd29e4b/go.mod h1:5MWrJXKRQyhQdUCF+vu6U5c4nQpg70vW3eHaU0/AYbU=
+github.com/pbnjay/memory v0.0.0-20201129165224-b12e5d931931 h1:EeWknjeRU+R3O4ghG7XZCpgSfJNStZyEP8aWyQwJM8s=
+github.com/pbnjay/memory v0.0.0-20201129165224-b12e5d931931/go.mod h1:RMU2gJXhratVxBDTFeOdNhd540tG57lt9FIUV0YLvIQ=
 github.com/pierrec/lz4 v2.4.1+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
 github.com/pierrec/lz4 v2.5.2+incompatible h1:WCjObylUIOlKy/+7Abdn34TLIkXiA4UWUMhxq9m9ZXI=
 github.com/pierrec/lz4 v2.5.2+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
@@ -74,22 +74,19 @@ github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5
 github.com/xdg/scram v0.0.0-20180814205039-7eeb5667e42c/go.mod h1:lB8K/P019DLNhemzwFU4jHLhdvlE6uDZjXFejJXr49I=
 github.com/xdg/stringprep v1.0.0/go.mod h1:Jhud4/sHMO4oL310DaZAKk9ZaJ08SJfe+sJh0HrGL1Y=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/crypto v0.0.0-20200204104054-c9f3fb736b72 h1:+ELyKg6m8UBf0nPFSqD0mi7zUfwPyXo23HNjMnXPz7w=
 golang.org/x/crypto v0.0.0-20200204104054-c9f3fb736b72/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-golang.org/x/net v0.0.0-20200202094626-16171245cfb2 h1:CCH4IOTTfewWjGOlSp+zGcjutRKlBEZQ6wTn8ozI/nI=
 golang.org/x/net v0.0.0-20200202094626-16171245cfb2/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.0.0-20200602114024-627f9648deb9 h1:pNX+40auqi2JqRfOP1akLGtYcn15TUbkhwuCO3foqqM=
-golang.org/x/net v0.0.0-20200602114024-627f9648deb9/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
+golang.org/x/net v0.0.0-20200707034311-ab3426394381 h1:VXak5I6aEWmAXeQjA+QSZzlgNrpq9mjcfDemuexIKsU=
+golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190405154228-4b34438f7a67/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd h1:xhmwyvizuTgC2qz7ZlMluP20uW+C3Rm0FD/WLDX8884=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
@@ -97,7 +94,6 @@ golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGm
 golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -111,7 +107,6 @@ gopkg.in/jcmturner/gokrb5.v7 v7.5.0 h1:a9tsXlIDD9SKxotJMK3niV7rPZAJeX2aD/0yg3qlI
 gopkg.in/jcmturner/gokrb5.v7 v7.5.0/go.mod h1:l8VISx+WGYp+Fp7KRbsiUuXTTOnxIc3Tuvyavf11/WM=
 gopkg.in/jcmturner/rpc.v1 v1.1.0 h1:QHIUxTX1ISuAv9dD2wJ9HWQVuWDX/Zc0PfeC2tjc4rU=
 gopkg.in/jcmturner/rpc.v1 v1.1.0/go.mod h1:YIdkC4XfD6GXbzje11McwsDuOlZQSb9W4vfLvuNnlv8=
-gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

gor.go

@@ -4,8 +4,6 @@ package main
 
 import (
 	"flag"
-	"fmt"
-	"io"
 	"log"
 	"net/http"
 	"net/http/httputil"
@@ -20,7 +18,6 @@ import (
 )
 
 var (
-	mode       string
 	cpuprofile = flag.String("cpuprofile", "", "write cpu profile to file")
 	memprofile = flag.String("memprofile", "", "write memory profile to this file")
 )
@@ -33,19 +30,8 @@ func loggingMiddleware(next http.Handler) http.Handler {
 	})
 }
 
-var closeCh chan int
-
 func main() {
-	closeCh = make(chan int)
-	// // Don't exit on panic
-	// defer func() {
-	// 	if r := recover(); r != nil {
-	// 		fmt.Printf("PANIC: pkg: %v %s \n", r, debug.Stack())
-	// 	}
-	// }()
-
-	// If not set via env cariable
-	if len(os.Getenv("GOMAXPROCS")) == 0 {
+	if os.Getenv("GOMAXPROCS") == "" {
 		runtime.GOMAXPROCS(runtime.NumCPU() * 2)
 	}
 
@@ -57,16 +43,16 @@ func main() {
 		}
 		dir, _ := os.Getwd()
 
-		log.Println("Started example file server for current directory on address ", args[1])
+		Debug(0, "Started example file server for current directory on address ", args[1])
 
 		log.Fatal(http.ListenAndServe(args[1], loggingMiddleware(http.FileServer(http.Dir(dir)))))
 	} else {
 		flag.Parse()
 		checkSettings()
-		plugins = InitPlugins()
+		plugins = NewPlugins()
 	}
 
-	fmt.Println("Version:", VERSION)
+	log.Printf("[PPID %d and PID %d] Version:%s\n", os.Getppid(), os.Getpid(), VERSION)
 
 	if len(plugins.Inputs) == 0 || len(plugins.Outputs) == 0 {
 		log.Fatal("Required at least 1 input and 1 output")
@@ -80,41 +66,34 @@ func main() {
 		profileCPU(*cpuprofile)
 	}
 
-	if Settings.pprof != "" {
+	if Settings.Pprof != "" {
 		go func() {
-			log.Println(http.ListenAndServe(Settings.pprof, nil))
+			log.Println(http.ListenAndServe(Settings.Pprof, nil))
 		}()
 	}
 
-	emitter := NewEmitter(closeCh)
-	c := make(chan os.Signal, 1)
-	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
-	go func() {
-		<-c
-		finalize(plugins)
-		os.Exit(1)
-	}()
+	closeCh := make(chan int)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
+	if Settings.ExitAfter > 0 {
+		log.Printf("Running gor for a duration of %s\n", Settings.ExitAfter)
 
-	if Settings.exitAfter > 0 {
-		log.Println("Running gor for a duration of", Settings.exitAfter)
-
-		time.AfterFunc(Settings.exitAfter, func() {
-			log.Println("Stopping gor after", Settings.exitAfter)
+		time.AfterFunc(Settings.ExitAfter, func() {
+			log.Printf("gor run timeout %s\n", Settings.ExitAfter)
 			close(closeCh)
 		})
 	}
-
-	emitter.Start(plugins, Settings.middleware)
-}
-
-func finalize(plugins *InOutPlugins) {
-	for _, p := range plugins.All {
-		if cp, ok := p.(io.Closer); ok {
-			cp.Close()
-		}
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+	exit := 0
+	select {
+	case <-c:
+		exit = 1
+	case <-closeCh:
+		exit = 0
 	}
-
-	time.Sleep(100 * time.Millisecond)
+	emitter.Close()
+	os.Exit(exit)
 }
 
 func profileCPU(cpuprofile string) {
@@ -128,7 +107,6 @@ func profileCPU(cpuprofile string) {
 		time.AfterFunc(30*time.Second, func() {
 			pprof.StopCPUProfile()
 			f.Close()
-			log.Println("Stop profiling after 30 seconds")
 		})
 	}
 }

gor_stat.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"log"
 	"runtime"
 	"strconv"
 	"time"
@@ -25,15 +24,14 @@ func NewGorStat(statName string, rateMs int) (s *GorStat) {
 	s.max = 0
 	s.count = 0
 
-	if Settings.stats {
-		log.Println(s.statName + ":latest,mean,max,count,count/second,gcount")
+	if Settings.Stats {
 		go s.reportStats()
 	}
 	return
 }
 
 func (s *GorStat) Write(latest int) {
-	if Settings.stats {
+	if Settings.Stats {
 		if latest > s.max {
 			s.max = latest
 		}
@@ -57,8 +55,9 @@ func (s *GorStat) String() string {
 }
 
 func (s *GorStat) reportStats() {
+	Debug(0, "\n", s.statName+":latest,mean,max,count,count/second,gcount")
 	for {
-		log.Println(s)
+		Debug(0, "\n", s)
 		s.Reset()
 		time.Sleep(time.Duration(s.rateMs) * time.Millisecond)
 	}

http_client.go

@@ -1,523 +0,0 @@
-package main
-
-import (
-	"bufio"
-	"bytes"
-	"crypto/tls"
-	"encoding/base64"
-	"io"
-	"log"
-	"net"
-	"net/http"
-	"net/http/httputil"
-	"net/url"
-	"runtime/debug"
-	"strconv"
-	"strings"
-	"sync"
-	"syscall"
-	"time"
-
-	"github.com/buger/goreplay/proto"
-)
-
-var httpMu sync.Mutex
-
-const (
-	readChunkSize   = 64 * 1024
-	maxResponseSize = 1073741824
-)
-
-var chunkedSuffix = []byte("0\r\n\r\n")
-
-var defaultPorts = map[string]string{
-	"http":  "80",
-	"https": "443",
-}
-
-type HTTPClientConfig struct {
-	FollowRedirects    int
-	Debug              bool
-	OriginalHost       bool
-	ConnectionTimeout  time.Duration
-	Timeout            time.Duration
-	ResponseBufferSize int
-	CompatibilityMode  bool
-}
-
-type HTTPClient struct {
-	baseURL        string
-	scheme         string
-	host           string
-	auth           string
-	conn           net.Conn
-	proxy          *url.URL
-	proxyAuth      string
-	respBuf        []byte
-	config         *HTTPClientConfig
-	goClient       *http.Client
-	redirectsCount int
-}
-
-func NewHTTPClient(baseURL string, config *HTTPClientConfig) *HTTPClient {
-	if !strings.HasPrefix(baseURL, "http") {
-		baseURL = "http://" + baseURL
-	}
-
-	u, _ := url.Parse(baseURL)
-
-	if config.Timeout == 0 {
-		config.Timeout = time.Second
-	}
-
-	config.ConnectionTimeout = config.Timeout
-
-	if config.ResponseBufferSize == 0 {
-		config.ResponseBufferSize = 100 * 1024 // 100kb
-	}
-
-	client := new(HTTPClient)
-	client.baseURL = u.String()
-	client.host = u.Host
-	client.scheme = u.Scheme
-	client.respBuf = make([]byte, config.ResponseBufferSize)
-	client.config = config
-
-	if config.CompatibilityMode {
-		client.goClient = &http.Client{
-			// #TODO
-			// CheckRedirect: redirectPolicyFunc,
-		}
-	}
-
-	if u.User != nil {
-		client.auth = "Basic " + base64.StdEncoding.EncodeToString([]byte(u.User.String()))
-	}
-
-	client.proxy, _ = http.ProxyFromEnvironment(&http.Request{URL: u})
-
-	if client.isProxy() && client.proxy.User != nil {
-		client.proxyAuth = "Basic " + base64.StdEncoding.EncodeToString([]byte(client.proxy.User.String()))
-	}
-
-	return client
-}
-
-func (c *HTTPClient) Connect() (err error) {
-	c.Disconnect()
-
-	var toDial string
-	if !strings.Contains(c.host, ":") {
-		toDial = c.host + ":" + defaultPorts[c.scheme]
-	} else {
-		toDial = c.host
-	}
-
-	if c.isProxy() {
-		if c.proxy.Scheme != "http" {
-			panic("Unsupported HTTP Proxy method")
-		}
-		Debug("[HTTPClient] Connecting to proxy", c.proxy.String(), "<>", toDial)
-		c.conn, err = net.DialTimeout("tcp", c.proxy.Host, c.config.ConnectionTimeout)
-		if err != nil {
-			return
-		}
-		if c.scheme == "https" {
-			c.conn.Write([]byte("CONNECT " + toDial + " HTTP/1.1\r\n"))
-			if c.proxyAuth != "" {
-				c.conn.Write([]byte("Proxy-Authorization: " + c.proxyAuth + "\r\n"))
-			}
-			c.conn.Write([]byte("\r\n"))
-			br := bufio.NewReader(c.conn)
-			l, _, err := br.ReadLine()
-			if err != nil {
-				return err
-			}
-			if len(l) < 12 {
-				panic("HTTP proxy did not respond correctly")
-			}
-			status := l[9:12]
-			if !bytes.Equal(status, []byte("200")) {
-				panic("HTTP proxy did not respond correctly")
-			}
-			for {
-				// Read until we find the empty line
-				l, _, err := br.ReadLine()
-				if err != nil {
-					return err
-				}
-				if len(l) == 0 {
-					break
-				}
-			}
-		}
-		Debug("[HTTPClient] Proxy successfully connected")
-	} else {
-		c.conn, err = net.DialTimeout("tcp", toDial, c.config.ConnectionTimeout)
-		if err != nil {
-			return
-		}
-	}
-
-	if c.scheme == "https" {
-		// Wrap our socket in TLS
-		Debug("[HTTPClient] Wrapping socket in TLS", c.host)
-		tlsConn := tls.Client(c.conn, &tls.Config{InsecureSkipVerify: true, ServerName: c.host})
-
-		if err = tlsConn.Handshake(); err != nil {
-			return
-		}
-
-		c.conn = tlsConn
-		Debug("[HTTPClient] Successfully wrapped in TLS")
-	}
-
-	return
-}
-
-func (c *HTTPClient) Disconnect() {
-	if c.conn != nil {
-		c.conn.Close()
-		c.conn = nil
-		Debug("[HTTP] Disconnected: ", c.baseURL)
-	}
-}
-
-func (c *HTTPClient) isAlive(readBytes *int) bool {
-	// Ready 1 byte from socket without timeout to check if it not closed
-	c.conn.SetReadDeadline(time.Now().Add(time.Millisecond))
-	n, err := c.conn.Read(c.respBuf[:1])
-
-	if err == io.EOF {
-		Debug("[HTTPClient] connection closed, reconnecting")
-		return false
-	}
-
-	if err == syscall.EPIPE {
-		Debug("Detected broken pipe.", err)
-		return false
-	}
-	if n != 0 {
-		*readBytes += n
-		Debug("[HTTPClient] isAlive readBytes ", *readBytes)
-	}
-	return true
-}
-
-func (c *HTTPClient) SendGoClient(data []byte) ([]byte, error) {
-	var req *http.Request
-	var resp *http.Response
-	var err error
-
-	req, err = http.ReadRequest(bufio.NewReader(bytes.NewBuffer(data)))
-	if err != nil {
-		return nil, err
-	}
-
-	if !c.config.OriginalHost {
-		req.Host = c.host
-	}
-
-	if c.auth != "" {
-		req.Header.Add("Authorization", c.auth)
-	}
-
-	req.URL, _ = url.ParseRequestURI(c.scheme + "://" + c.host + req.RequestURI)
-	req.RequestURI = ""
-
-	resp, err = c.goClient.Do(req)
-	if err != nil {
-		return nil, err
-	}
-
-	return httputil.DumpResponse(resp, true)
-}
-
-func (c *HTTPClient) Send(data []byte) (response []byte, err error) {
-	// Don't exit on panic
-	defer func() {
-		if r := recover(); r != nil {
-			Debug("[HTTPClient]", r, string(data))
-
-			if _, ok := r.(error); ok {
-				log.Println("[HTTPClient] Failed to send request: ", string(data))
-				log.Println("[HTTPClient] Response: ", string(response))
-				log.Println("PANIC: pkg:", r, string(debug.Stack()))
-			}
-		}
-	}()
-
-	if c.config.CompatibilityMode {
-		return c.SendGoClient(data)
-	}
-
-	var readBytes int
-	if c.conn == nil || !c.isAlive(&readBytes) {
-		Debug("[HTTPClient] Connecting:", c.baseURL)
-		if err = c.Connect(); err != nil {
-			log.Println("[HTTPClient] Connection error:", err)
-			response = errorPayload(HTTP_CONNECTION_ERROR)
-			return
-		}
-	}
-
-	timeout := time.Now().Add(c.config.Timeout)
-
-	c.conn.SetWriteDeadline(timeout)
-
-	if !c.config.OriginalHost {
-		data = proto.SetHost(data, []byte(c.baseURL), []byte(c.host))
-	}
-
-	if c.isProxy() && c.scheme == "http" {
-		path := proto.Path(data)
-		if len(path) > 0 && path[0] == '/' {
-			data = proto.SetPath(data, c.proxyPath(path))
-			if c.proxyAuth != "" {
-				data = proto.SetHeader(data, []byte("Proxy-Authorization"), []byte(c.proxyAuth))
-			}
-		}
-	}
-
-	if c.auth != "" {
-		data = proto.SetHeader(data, []byte("Authorization"), []byte(c.auth))
-	}
-
-	if c.config.Debug {
-		Debug("[HTTPClient] Sending:", string(data))
-	}
-
-	return c.send(data, readBytes, timeout)
-}
-
-func (c *HTTPClient) send(data []byte, readBytes int, timeout time.Time) (response []byte, err error) {
-	var payload []byte
-	var n int
-	if _, err = c.conn.Write(data); err != nil {
-		Debug("[HTTPClient] Write error:", err, c.baseURL)
-		response = errorPayload(HTTP_TIMEOUT)
-		c.Disconnect()
-		return
-	}
-
-	var currentChunk []byte
-	timeout = time.Now().Add(c.config.Timeout)
-	chunked := false
-	contentLength := -1
-	currentContentLength := 0
-	chunks := 0
-
-	for {
-		c.conn.SetReadDeadline(timeout)
-
-		if readBytes < len(c.respBuf) {
-			n, err = c.conn.Read(c.respBuf[readBytes:])
-			readBytes += n
-			chunks++
-
-			// First chunk
-			if chunked || contentLength != -1 {
-				currentContentLength += n
-			} else {
-				// If headers are finished
-				var firstEmptyLine = bytes.Index(c.respBuf[:readBytes], proto.EmptyLine)
-				if firstEmptyLine != -1 {
-					if bytes.Equal(proto.Header(c.respBuf[:readBytes], []byte("Transfer-Encoding")), []byte("chunked")) {
-						chunked = true
-					} else {
-						status, _ := strconv.Atoi(string(proto.Status(c.respBuf[:readBytes])))
-						// We want to soak up all 100 Continues received to get the real result code
-						if status >= 100 && status < 200 {
-							timeout = time.Now().Add(c.config.Timeout)
-							var deleteLen = firstEmptyLine + len(proto.EmptyLine)
-							copy(c.respBuf, c.respBuf[deleteLen:readBytes])
-							readBytes -= deleteLen
-							chunks--
-							continue
-						} else if status == 204 || status == 304 {
-							contentLength = 0
-							break
-						} else {
-							l := proto.Header(c.respBuf[:readBytes], []byte("Content-Length"))
-							if len(l) > 0 {
-								contentLength, _ = strconv.Atoi(string(l))
-							}
-						}
-					}
-
-					currentContentLength += len(proto.Body(c.respBuf[:readBytes]))
-				}
-			}
-
-			if chunked {
-				// Check if chunked message finished
-				if bytes.HasSuffix(c.respBuf[:readBytes], chunkedSuffix) {
-					break
-				}
-			} else if contentLength != -1 {
-				if currentContentLength > contentLength {
-					Debug("[HTTPClient] disconnected, wrong length", currentContentLength, contentLength)
-					c.Disconnect()
-					break
-				} else if currentContentLength == contentLength {
-					break
-				}
-			}
-
-			if err != nil {
-				if err == io.EOF {
-					err = nil
-				}
-				break
-			}
-		} else {
-			if currentChunk == nil {
-				currentChunk = make([]byte, readChunkSize)
-			}
-
-			n, err = c.conn.Read(currentChunk)
-
-			readBytes += int(n)
-			chunks++
-			currentContentLength += n
-
-			if chunked {
-				// Check if chunked message finished
-				if bytes.HasSuffix(currentChunk[:n], chunkedSuffix) {
-					break
-				}
-			} else if contentLength != -1 {
-				if currentContentLength > contentLength {
-					Debug("[HTTPClient] disconnected, wrong length", currentContentLength, contentLength)
-					c.Disconnect()
-					break
-				} else if currentContentLength == contentLength {
-					break
-				}
-			} else {
-				Debug("[HTTPClient] disconnected, can't find Content-Length or Chunked")
-				c.Disconnect()
-				break
-			}
-
-			if err == io.EOF {
-				break
-			} else if err != nil {
-				Debug("[HTTPClient] Read the whole body error:", err, c.baseURL)
-				break
-			}
-
-		}
-
-		if readBytes >= maxResponseSize {
-			Debug("[HTTPClient] Body is more than the max size", maxResponseSize,
-				c.baseURL)
-			break
-		}
-
-		// For following chunks expect less timeout
-		timeout = time.Now().Add(c.config.Timeout / 5)
-	}
-
-	if err != nil && readBytes == 0 {
-		Debug("[HTTPClient] Response read timeout error", err, c.conn, readBytes, string(c.respBuf[:readBytes]))
-		response = errorPayload(HTTP_TIMEOUT)
-		c.Disconnect()
-		return
-	}
-
-	if readBytes < 4 || string(c.respBuf[:4]) != "HTTP" {
-		maxRead := 100
-		if readBytes < maxRead {
-			maxRead = readBytes
-		}
-		Debug("[HTTPClient] Response read unknown error", err, c.conn, readBytes, string(c.respBuf[:maxRead]))
-		response = errorPayload(HTTP_UNKNOWN_ERROR)
-		c.Disconnect()
-		return
-	}
-
-	if readBytes > len(c.respBuf) {
-		readBytes = len(c.respBuf)
-	}
-	payload = make([]byte, readBytes)
-	copy(payload, c.respBuf[:readBytes])
-
-	if c.config.Debug {
-		Debug("[HTTPClient] Received:", string(payload))
-	}
-
-	if c.config.FollowRedirects > 0 && c.redirectsCount < c.config.FollowRedirects {
-		status := payload[9:12]
-
-		// 3xx requests
-		if status[0] == '3' {
-			c.redirectsCount++
-
-			location := proto.Header(payload, []byte("Location"))
-			redirectPayload := proto.SetPath(data, location)
-
-			if c.config.Debug {
-				Debug("[HTTPClient] Redirecting to: " + string(location))
-			}
-
-			return c.Send(redirectPayload)
-		}
-	}
-
-	if bytes.Equal(proto.Status(payload), []byte("400")) {
-		Debug("[HTTPClient] Closed connection on 400 response")
-		c.Disconnect()
-	}
-
-	c.redirectsCount = 0
-
-	return payload, err
-}
-
-func (c *HTTPClient) Get(path string) (response []byte, err error) {
-	payload := "GET " + path + " HTTP/1.1\r\n\r\n"
-
-	return c.Send([]byte(payload))
-}
-
-func (c *HTTPClient) Post(path string, body []byte) (response []byte, err error) {
-	payload := "POST " + path + " HTTP/1.1\r\n"
-	payload += "Content-Length: " + strconv.Itoa(len(body)) + "\r\n\r\n"
-	payload += string(body)
-
-	return c.Send([]byte(payload))
-}
-
-func (c *HTTPClient) proxyPath(path []byte) []byte {
-	return append([]byte(c.scheme+"://"+c.host), path...)
-}
-
-func (c *HTTPClient) isProxy() bool {
-	return c.proxy != nil
-}
-
-const (
-	// https://support.cloudflare.com/hc/en-us/articles/200171936-Error-520-Web-server-is-returning-an-unknown-error
-	HTTP_UNKNOWN_ERROR = "520"
-	// https://support.cloudflare.com/hc/en-us/articles/200171916-Error-521-Web-server-is-down
-	HTTP_CONNECTION_ERROR = "521"
-	// https://support.cloudflare.com/hc/en-us/articles/200171906-Error-522-Connection-timed-out
-	HTTP_CONNECTION_TIMEOUT = "522"
-	// https://support.cloudflare.com/hc/en-us/articles/200171946-Error-523-Origin-is-unreachable
-	HTTP_UNREACHABLE = "523"
-	// https://support.cloudflare.com/hc/en-us/articles/200171926-Error-524-A-timeout-occurred
-	HTTP_TIMEOUT = "524"
-)
-
-var errorPayloadTemplate = "HTTP/1.1 202 Accepted\r\nDate: Mon, 17 Aug 2015 14:10:11 GMT\r\nContent-Length: 0\r\nContent-Type: text/plain; charset=utf-8\r\n\r\n"
-
-func errorPayload(errorCode string) []byte {
-	payload := make([]byte, len(errorPayloadTemplate))
-	copy(payload, errorPayloadTemplate)
-
-	copy(payload[29:58], []byte(time.Now().Format(time.RFC1123)))
-	copy(payload[9:12], errorCode)
-
-	return payload
-}

http_client_test.go

@@ -1,533 +0,0 @@
-package main
-
-import (
-	"bytes"
-	"crypto/rand"
-	"io/ioutil"
-	_ "log"
-	"net"
-	"net/http"
-	"net/http/httptest"
-	"net/http/httputil"
-	_ "reflect"
-	"strings"
-	"sync"
-	"testing"
-	"time"
-
-	"github.com/buger/goreplay/proto"
-)
-
-func TestHTTPClientURLPort(t *testing.T) {
-	c1 := NewHTTPClient("http://example.com", &HTTPClientConfig{})
-	if c1.baseURL != "http://example.com" {
-		t.Error("Sould not add 80 port for http:", c1.baseURL)
-	}
-
-	c2 := NewHTTPClient("https://example.com", &HTTPClientConfig{})
-	if c2.baseURL != "https://example.com" {
-		t.Error("Sould not add 443 port for https:", c2.baseURL)
-	}
-
-	c3 := NewHTTPClient("https://example.com:1", &HTTPClientConfig{})
-	if c3.baseURL != "https://example.com:1" {
-		t.Error("Sould use specified port:", c3.baseURL)
-	}
-
-	c4 := NewHTTPClient("example.com", &HTTPClientConfig{})
-	if c4.baseURL != "http://example.com" {
-		t.Error("Sould not add default protocol:", c4.baseURL)
-	}
-}
-
-func TestHTTPClientSend(t *testing.T) {
-	wg := new(sync.WaitGroup)
-
-	payload := func(reqType string) []byte {
-		switch reqType {
-		case "GET":
-			return []byte("GET / HTTP/1.1\r\n\r\n")
-		case "POST":
-			return []byte("POST /post HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.org\r\n\r\na=1&b=2")
-		case "POST_CHUNKED":
-			return []byte("POST / HTTP/1.1\r\nHost: www.w3.org\r\nTransfer-Encoding: chunked\r\n\r\n4\r\nWiki\r\n5\r\npedia\r\ne\r\n in\r\n\r\nchunks.\r\n0\r\n\r\n")
-		}
-
-		return []byte("")
-	}
-
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-
-		if r.Method == "POST" {
-			defer r.Body.Close()
-			body, _ := ioutil.ReadAll(r.Body)
-
-			if len(r.TransferEncoding) > 0 && r.TransferEncoding[0] == "chunked" {
-				if string(body) != "Wikipedia in\r\n\r\nchunks." {
-					t.Error("Wrong POST body:", body, string(body))
-				}
-			} else {
-				if string(body) != "a=1&b=2" {
-					buf, _ := httputil.DumpRequest(r, true)
-					t.Error("Wrong POST body:", string(body), string(buf))
-				}
-			}
-		}
-
-		wg.Done()
-	}))
-	defer server.Close()
-
-	client := NewHTTPClient(server.URL, &HTTPClientConfig{Debug: true})
-
-	wg.Add(4)
-	client.Send(payload("POST"))
-	client.Send(payload("GET"))
-	client.Send(payload("POST_CHUNKED"))
-	client.Send(payload("POST"))
-
-	wg.Wait()
-
-	client = NewHTTPClient(server.URL, &HTTPClientConfig{Debug: true, CompatibilityMode: true})
-
-	wg.Add(4)
-
-	if _, err := client.Send(payload("POST")); err != nil {
-		t.Fatal(err.Error())
-	}
-	if _, err := client.Send(payload("GET")); err != nil {
-		t.Fatal(err.Error())
-	}
-	if _, err := client.Send(payload("POST_CHUNKED")); err != nil {
-		t.Fatal(err.Error())
-	}
-	if _, err := client.Send(payload("POST")); err != nil {
-		t.Fatal(err.Error())
-	}
-
-	wg.Wait()
-}
-
-func TestHTTPClientResonseByClose(t *testing.T) {
-	wg := new(sync.WaitGroup)
-
-	payload := []byte("GET / HTTP/1.1\r\n\r\n")
-	ln, _ := net.Listen("tcp", ":0")
-	go func() {
-		for {
-			conn, _ := ln.Accept()
-			buf := make([]byte, 4096)
-			conn.Read(buf)
-
-			conn.Write([]byte("HTTP/1.1 200 OK\r\n\r\n"))
-			conn.Write([]byte("ab"))
-			conn.Close()
-
-			wg.Done()
-		}
-	}()
-
-	client := NewHTTPClient(ln.Addr().String(), &HTTPClientConfig{Debug: true})
-
-	wg.Add(1)
-	resp, _ := client.Send(payload)
-
-	if !bytes.Equal(resp, []byte("HTTP/1.1 200 OK\r\n\r\nab")) {
-		t.Error("Should return valid response", string(resp))
-	}
-
-	wg.Wait()
-}
-
-// https://github.com/buger/gor/issues/184
-func TestHTTPClientResponseBuffer(t *testing.T) {
-	testCases := []struct {
-		name         string
-		responseSize int
-		buffserSize  int
-		expectedSize int
-		timeout      time.Duration
-	}{
-		{"Chunked, buffer overflow", 10 * 1024, 1024, 1024, 50 * time.Millisecond},
-
-		{"Chunked, fits buffer", 10 * 1024, 64 * 1024, 10*1024 + 145 /* headers length + chunked meta */, 50 * time.Millisecond},
-
-		{"Content-Length, buffer overflow", 1024, 1000, 1000, 50 * time.Millisecond},
-
-		{"Content-Length, fits buffer", 1024, 64 * 1024, 1024 + 118, 50 * time.Millisecond},
-	}
-
-	for _, tc := range testCases {
-		wg := new(sync.WaitGroup)
-
-		payload := []byte("GET / HTTP/1.1\r\n\r\n")
-
-		server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-
-			size := tc.responseSize // 1kb
-			rb := make([]byte, size)
-			rand.Read(rb)
-
-			w.Write(rb[:size/2])
-			w.Write(rb[size/2:])
-
-			wg.Done()
-		}))
-
-		client := NewHTTPClient(server.URL, &HTTPClientConfig{Debug: true, ResponseBufferSize: tc.buffserSize, Timeout: 100 * time.Millisecond})
-
-		wg.Add(2)
-
-		start := time.Now()
-		client.Send(payload)
-		resp, err := client.Send(payload)
-		stop := time.Now()
-
-		if err != nil {
-			t.Error("Request error", err)
-		}
-
-		if stop.Sub(start) > tc.timeout {
-			t.Error("Request took too long", stop.Sub(start), tc.timeout)
-		}
-
-		if len(resp) != tc.expectedSize {
-			t.Error(tc.name, " - Wrong response size:", tc.expectedSize, len(resp))
-		} else {
-			if !bytes.Equal(resp[0:8], []byte("HTTP/1.1")) {
-				t.Error(tc.name, " - Response buffer contains data from previous request", string(resp), len(resp))
-			}
-		}
-
-		wg.Wait()
-		server.Close()
-	}
-}
-
-func TestHTTPClientHTTPSSend(t *testing.T) {
-	wg := new(sync.WaitGroup)
-
-	payload := func(reqType string) []byte {
-		switch reqType {
-		case "GET":
-			return []byte("GET / HTTP/1.1\r\n\r\n")
-		case "POST":
-			return []byte("POST /post HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.org\r\n\r\na=1&b=2")
-		case "POST_CHUNKED":
-			return []byte("POST / HTTP/1.1\r\nHost: www.w3.org\r\nTransfer-Encoding: chunked\r\n\r\n4\r\nWiki\r\n5\r\npedia\r\ne\r\n in\r\n\r\nchunks.\r\n0\r\n\r\n")
-		}
-
-		return []byte("")
-	}
-
-	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-
-		if r.Method == "POST" {
-			defer r.Body.Close()
-			body, _ := ioutil.ReadAll(r.Body)
-
-			if len(r.TransferEncoding) > 0 && r.TransferEncoding[0] == "chunked" {
-				if string(body) != "Wikipedia in\r\n\r\nchunks." {
-					t.Error("Wrong POST body:", body, string(body))
-				}
-			} else {
-				if string(body) != "a=1&b=2" {
-					buf, _ := httputil.DumpRequest(r, true)
-					t.Error("Wrong POST body:", string(body), string(buf))
-				}
-			}
-		}
-
-		wg.Done()
-	}))
-	defer server.Close()
-
-	client := NewHTTPClient(server.URL, &HTTPClientConfig{})
-
-	wg.Add(4)
-	client.Send(payload("POST"))
-	client.Send(payload("GET"))
-	client.Send(payload("POST_CHUNKED"))
-	client.Send(payload("POST"))
-
-	wg.Wait()
-}
-
-func TestHTTPClientServerInstantDisconnect(t *testing.T) {
-	wg := new(sync.WaitGroup)
-
-	GETPayload := []byte("GET / HTTP/1.1\r\n\r\n")
-
-	ln, _ := net.Listen("tcp", "127.0.0.1:0")
-	defer ln.Close()
-
-	go func() {
-		for {
-			conn, err := ln.Accept()
-
-			if err != nil {
-				break
-			}
-			conn.Close()
-			wg.Done()
-		}
-	}()
-
-	client := NewHTTPClient(ln.Addr().String(), &HTTPClientConfig{})
-
-	wg.Add(2)
-	client.Send(GETPayload)
-	client.Send(GETPayload)
-
-	wg.Wait()
-}
-
-func TestHTTPClientServerNoKeepAlive(t *testing.T) {
-	wg := new(sync.WaitGroup)
-
-	GETPayload := []byte("GET / HTTP/1.1\r\n\r\n")
-
-	ln, _ := net.Listen("tcp", "127.0.0.1:0")
-	defer ln.Close()
-
-	go func() {
-		for {
-			conn, err := ln.Accept()
-			if err != nil {
-				break
-			}
-
-			buf := make([]byte, 4096)
-			reqLen, err := conn.Read(buf)
-			if err != nil {
-				t.Error("Error reading:", err.Error())
-			}
-			Debug("Received: ", string(buf[0:reqLen]))
-			conn.Write([]byte("OK"))
-
-			// No keep-alive connections
-			conn.Close()
-
-			wg.Done()
-		}
-	}()
-
-	client := NewHTTPClient(ln.Addr().String(), &HTTPClientConfig{})
-
-	wg.Add(2)
-	client.Send(GETPayload)
-	client.Send(GETPayload)
-
-	wg.Wait()
-}
-
-func TestHTTPClientRedirect(t *testing.T) {
-	wg := new(sync.WaitGroup)
-
-	GETPayload := []byte("GET / HTTP/1.1\r\n\r\n")
-
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-
-		if r.URL.Path == "/" {
-			http.Redirect(w, r, "/new", 301)
-		}
-
-		wg.Done()
-	}))
-	defer server.Close()
-
-	client := NewHTTPClient(server.URL, &HTTPClientConfig{FollowRedirects: 1, Debug: false})
-
-	// Should do 2 queries
-	wg.Add(2)
-	client.Send(GETPayload)
-
-	wg.Wait()
-}
-
-func TestHTTPClientRedirectLimit(t *testing.T) {
-	wg := new(sync.WaitGroup)
-
-	GETPayload := []byte("GET / HTTP/1.1\r\n\r\n")
-
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-
-		if r.URL.Path == "/" {
-			http.Redirect(w, r, "/r1", 301)
-		}
-
-		if r.URL.Path == "/r1" {
-			http.Redirect(w, r, "/r2", 301)
-		}
-
-		if r.URL.Path == "/r2" {
-			http.Redirect(w, r, "/new", 301)
-		}
-
-		wg.Done()
-	}))
-	defer server.Close()
-
-	client := NewHTTPClient(server.URL, &HTTPClientConfig{FollowRedirects: 2, Debug: false})
-
-	// Have 3 redirects + 1 GET, but should do only 2 redirects + GET
-	wg.Add(3)
-	client.Send(GETPayload)
-
-	wg.Wait()
-}
-
-func TestHTTPClientKeepHeadersRedirect(t *testing.T) {
-	wg := new(sync.WaitGroup)
-
-	GETPayload := []byte("GET / HTTP/1.1\r\n\r\n")
-
-	GETPayload = proto.AddHeader(GETPayload, []byte("keep-header"), []byte("true"))
-
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-
-		if r.URL.Path == "/" {
-			http.Redirect(w, r, "/new", 301)
-		}
-
-		if r.Header.Get("keep-header") != "true" {
-			t.Errorf("Header keep-header was incorrect, got: %s, want: %s.", r.Header.Get("keep-header"), "true")
-		}
-
-		wg.Done()
-	}))
-	defer server.Close()
-
-	client := NewHTTPClient(server.URL, &HTTPClientConfig{FollowRedirects: 1, Debug: false})
-
-	wg.Add(2)
-	client.Send(GETPayload)
-
-	wg.Wait()
-}
-
-func TestHTTPClientBasicAuth(t *testing.T) {
-	wg := new(sync.WaitGroup)
-	wg.Add(2)
-
-	GETPayload := []byte("GET / HTTP/1.1\r\n\r\n")
-
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		user, pass, _ := r.BasicAuth()
-
-		if user != "user" || pass != "pass" {
-			http.Error(w, "Unauthorized.", 401)
-			wg.Done()
-			return
-		}
-
-		wg.Done()
-	}))
-	defer server.Close()
-
-	client := NewHTTPClient(server.URL, &HTTPClientConfig{Debug: false})
-	resp, _ := client.Send(GETPayload)
-	client.Disconnect()
-
-	if !bytes.Equal(proto.Status(resp), []byte("401")) {
-		t.Error("Should return unauthorized error", string(resp))
-	}
-
-	authUrl := strings.Replace(server.URL, "http://", "http://user:pass@", -1)
-	client = NewHTTPClient(authUrl, &HTTPClientConfig{Debug: false})
-	resp, _ = client.Send(GETPayload)
-	client.Disconnect()
-
-	if !bytes.Equal(proto.Status(resp), []byte("200")) {
-		t.Error("Should return proper response", string(resp))
-	}
-
-	wg.Wait()
-}
-
-func TestHTTPClientHandleHTTP10(t *testing.T) {
-	wg := new(sync.WaitGroup)
-
-	GETPayload := []byte("GET http://foobar.com/path HTTP/1.0\r\n\r\n")
-
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-
-		if r.URL.Path != "/path" {
-			t.Error("Path not match:", r.URL.Path)
-		}
-
-		wg.Done()
-	}))
-	defer server.Close()
-
-	client := NewHTTPClient(server.URL, &HTTPClientConfig{Debug: true})
-
-	wg.Add(1)
-	client.Send(GETPayload)
-
-	wg.Wait()
-}
-
-func TestHTTPClientErrors(t *testing.T) {
-	req := []byte("GET http://foobar.com/path HTTP/1.0\r\n\r\n")
-
-	// Port not exists
-	client := NewHTTPClient("http://127.0.0.1:1", &HTTPClientConfig{Debug: true})
-	if resp, err := client.Send(req); err != nil {
-		if s := proto.Status(resp); !bytes.Equal(s, []byte("521")) {
-			t.Error("Should return status 521 for connection refused, instead:", string(s))
-		}
-	} else {
-		t.Error("Should throw error")
-	}
-
-	client = NewHTTPClient("http://not.existing", &HTTPClientConfig{Debug: true})
-	if resp, err := client.Send(req); err != nil {
-		if s := proto.Status(resp); !bytes.Equal(s, []byte("521")) {
-			t.Error("Should return status 521 for no such host, instead:", string(s))
-		}
-	} else {
-		t.Error("Should throw error")
-	}
-
-	// Non routable IP address to simulate connection timeout
-	client = NewHTTPClient("http://10.255.255.1", &HTTPClientConfig{Debug: true, ConnectionTimeout: 100 * time.Millisecond})
-
-	if resp, err := client.Send(req); err != nil {
-		if s := proto.Status(resp); !bytes.Equal(s, []byte("521")) {
-			t.Error("Should return status 521 for io/timeout:", string(s))
-		}
-	} else {
-		t.Error("Should throw error")
-	}
-
-	// Connecting but io timeout on read
-	ln, _ := net.Listen("tcp", "127.0.0.1:0")
-	client = NewHTTPClient("http://"+ln.Addr().String(), &HTTPClientConfig{Debug: true, Timeout: 10 * time.Millisecond})
-	defer ln.Close()
-
-	if resp, err := client.Send(req); err != nil {
-		if s := proto.Status(resp); !bytes.Equal(s, []byte("524")) {
-			t.Error("Should return status 524 for io read, instead:", string(s))
-		}
-	} else {
-		t.Error("Should throw error")
-	}
-
-	// Response read error read tcp [::1]:51128: connection reset by peer &{{0xc20802a000}}
-	ln1, _ := net.Listen("tcp", "127.0.0.1:0")
-	go func() {
-		ln1.Accept()
-	}()
-	defer ln1.Close()
-
-	client = NewHTTPClient("http://"+ln1.Addr().String(), &HTTPClientConfig{Debug: true, Timeout: 10 * time.Millisecond})
-
-	if resp, err := client.Send(req); err != nil {
-		if s := proto.Status(resp); !bytes.Equal(s, []byte("524")) {
-			t.Error("Should return status 524 for connection reset by peer, instead:", string(s))
-		}
-	} else {
-		t.Error("Should throw error")
-	}
-}

http_modifier.go

@@ -15,18 +15,18 @@ type HTTPModifier struct {
 
 func NewHTTPModifier(config *HTTPModifierConfig) *HTTPModifier {
 	// Optimization to skip modifier completely if we do not need it
-	if len(config.urlRegexp) == 0 &&
-		len(config.urlNegativeRegexp) == 0 &&
-		len(config.urlRewrite) == 0 &&
-		len(config.headerRewrite) == 0 &&
-		len(config.headerFilters) == 0 &&
-		len(config.headerNegativeFilters) == 0 &&
-		len(config.headerBasicAuthFilters) == 0 &&
-		len(config.headerHashFilters) == 0 &&
-		len(config.paramHashFilters) == 0 &&
-		len(config.params) == 0 &&
-		len(config.headers) == 0 &&
-		len(config.methods) == 0 {
+	if len(config.URLRegexp) == 0 &&
+		len(config.URLNegativeRegexp) == 0 &&
+		len(config.URLRewrite) == 0 &&
+		len(config.HeaderRewrite) == 0 &&
+		len(config.HeaderFilters) == 0 &&
+		len(config.HeaderNegativeFilters) == 0 &&
+		len(config.HeaderBasicAuthFilters) == 0 &&
+		len(config.HeaderHashFilters) == 0 &&
+		len(config.ParamHashFilters) == 0 &&
+		len(config.Params) == 0 &&
+		len(config.Headers) == 0 &&
+		len(config.Methods) == 0 {
 		return nil
 	}
 
@@ -34,16 +34,16 @@ func NewHTTPModifier(config *HTTPModifierConfig) *HTTPModifier {
 }
 
 func (m *HTTPModifier) Rewrite(payload []byte) (response []byte) {
-	if !proto.IsHTTPPayload(payload) {
+	if !proto.HasRequestTitle(payload) {
 		return payload
 	}
 
-	if len(m.config.methods) > 0 {
+	if len(m.config.Methods) > 0 {
 		method := proto.Method(payload)
 
 		matched := false
 
-		for _, m := range m.config.methods {
+		for _, m := range m.config.Methods {
 			if bytes.Equal(method, m) {
 				matched = true
 				break
@@ -55,24 +55,24 @@ func (m *HTTPModifier) Rewrite(payload []byte) (response []byte) {
 		}
 	}
 
-	if len(m.config.headers) > 0 {
-		for _, header := range m.config.headers {
+	if len(m.config.Headers) > 0 {
+		for _, header := range m.config.Headers {
 			payload = proto.SetHeader(payload, []byte(header.Name), []byte(header.Value))
 		}
 	}
 
-	if len(m.config.params) > 0 {
-		for _, param := range m.config.params {
+	if len(m.config.Params) > 0 {
+		for _, param := range m.config.Params {
 			payload = proto.SetPathParam(payload, param.Name, param.Value)
 		}
 	}
 
-	if len(m.config.urlRegexp) > 0 {
+	if len(m.config.URLRegexp) > 0 {
 		path := proto.Path(payload)
 
 		matched := false
 
-		for _, f := range m.config.urlRegexp {
+		for _, f := range m.config.URLRegexp {
 			if f.regexp.Match(path) {
 				matched = true
 				break
@@ -84,18 +84,18 @@ func (m *HTTPModifier) Rewrite(payload []byte) (response []byte) {
 		}
 	}
 
-	if len(m.config.urlNegativeRegexp) > 0 {
+	if len(m.config.URLNegativeRegexp) > 0 {
 		path := proto.Path(payload)
 
-		for _, f := range m.config.urlNegativeRegexp {
+		for _, f := range m.config.URLNegativeRegexp {
 			if f.regexp.Match(path) {
 				return
 			}
 		}
 	}
 
-	if len(m.config.headerFilters) > 0 {
-		for _, f := range m.config.headerFilters {
+	if len(m.config.HeaderFilters) > 0 {
+		for _, f := range m.config.HeaderFilters {
 			value := proto.Header(payload, f.name)
 
 			if len(value) == 0 {
@@ -108,8 +108,8 @@ func (m *HTTPModifier) Rewrite(payload []byte) (response []byte) {
 		}
 	}
 
-	if len(m.config.headerNegativeFilters) > 0 {
-		for _, f := range m.config.headerNegativeFilters {
+	if len(m.config.HeaderNegativeFilters) > 0 {
+		for _, f := range m.config.HeaderNegativeFilters {
 			value := proto.Header(payload, f.name)
 
 			if len(value) > 0 && f.regexp.Match(value) {
@@ -118,8 +118,8 @@ func (m *HTTPModifier) Rewrite(payload []byte) (response []byte) {
 		}
 	}
 
-	if len(m.config.headerBasicAuthFilters) > 0 {
-		for _, f := range m.config.headerBasicAuthFilters {
+	if len(m.config.HeaderBasicAuthFilters) > 0 {
+		for _, f := range m.config.HeaderBasicAuthFilters {
 			value := proto.Header(payload, []byte("Authorization"))
 
 			if len(value) > 0 {
@@ -135,8 +135,8 @@ func (m *HTTPModifier) Rewrite(payload []byte) (response []byte) {
 		}
 	}
 
-	if len(m.config.headerHashFilters) > 0 {
-		for _, f := range m.config.headerHashFilters {
+	if len(m.config.HeaderHashFilters) > 0 {
+		for _, f := range m.config.HeaderHashFilters {
 			value := proto.Header(payload, f.name)
 
 			if len(value) > 0 {
@@ -150,8 +150,8 @@ func (m *HTTPModifier) Rewrite(payload []byte) (response []byte) {
 		}
 	}
 
-	if len(m.config.paramHashFilters) > 0 {
-		for _, f := range m.config.paramHashFilters {
+	if len(m.config.ParamHashFilters) > 0 {
+		for _, f := range m.config.ParamHashFilters {
 			value, s, _ := proto.PathParam(payload, f.name)
 
 			if s != -1 {
@@ -165,10 +165,10 @@ func (m *HTTPModifier) Rewrite(payload []byte) (response []byte) {
 		}
 	}
 
-	if len(m.config.urlRewrite) > 0 {
+	if len(m.config.URLRewrite) > 0 {
 		path := proto.Path(payload)
 
-		for _, f := range m.config.urlRewrite {
+		for _, f := range m.config.URLRewrite {
 			if f.src.Match(path) {
 				path = f.src.ReplaceAll(path, f.target)
 				payload = proto.SetPath(payload, path)
@@ -178,8 +178,8 @@ func (m *HTTPModifier) Rewrite(payload []byte) (response []byte) {
 		}
 	}
 
-	if len(m.config.headerRewrite) > 0 {
-		for _, f := range m.config.headerRewrite {
+	if len(m.config.HeaderRewrite) > 0 {
+		for _, f := range m.config.HeaderRewrite {
 			value := proto.Header(payload, f.header)
 			if len(value) == 0 {
 				break

http_modifier_settings.go

@@ -10,19 +10,18 @@ import (
 
 // HTTPModifierConfig holds configuration options for built-in traffic modifier
 type HTTPModifierConfig struct {
-	urlNegativeRegexp      HTTPUrlRegexp
-	urlRegexp              HTTPUrlRegexp
-	urlRewrite             UrlRewriteMap
-	headerRewrite          HeaderRewriteMap
-	headerFilters          HTTPHeaderFilters
-	headerNegativeFilters  HTTPHeaderFilters
-	headerBasicAuthFilters HTTPHeaderBasicAuthFilters
-	headerHashFilters      HTTPHashFilters
-	paramHashFilters       HTTPHashFilters
-
-	params  HTTPParams
-	headers HTTPHeaders
-	methods HTTPMethods
+	URLNegativeRegexp      HTTPURLRegexp              `json:"http-disallow-url"`
+	URLRegexp              HTTPURLRegexp              `json:"http-allow-url"`
+	URLRewrite             URLRewriteMap              `json:"http-rewrite-url"`
+	HeaderRewrite          HeaderRewriteMap           `json:"http-rewrite-header"`
+	HeaderFilters          HTTPHeaderFilters          `json:"http-allow-header"`
+	HeaderNegativeFilters  HTTPHeaderFilters          `json:"http-disallow-header"`
+	HeaderBasicAuthFilters HTTPHeaderBasicAuthFilters `json:"http-basic-auth-filter"`
+	HeaderHashFilters      HTTPHashFilters            `json:"http-header-limiter"`
+	ParamHashFilters       HTTPHashFilters            `json:"http-param-limiter"`
+	Params                 HTTPParams                 `json:"http-set-param"`
+	Headers                HTTPHeaders                `json:"http-set-header"`
+	Methods                HTTPMethods                `json:"http-allow-method"`
 }
 
 //
@@ -40,10 +39,11 @@ func (h *HTTPHeaderFilters) String() string {
 	return fmt.Sprint(*h)
 }
 
+// Set method to implement flags.Value
 func (h *HTTPHeaderFilters) Set(value string) error {
 	valArr := strings.SplitN(value, ":", 2)
 	if len(valArr) < 2 {
-		return errors.New("need both header and value, colon-delimited (ex. user_id:^169$).")
+		return errors.New("need both header and value, colon-delimited (ex. user_id:^169$)")
 	}
 	val := strings.TrimSpace(valArr[1])
 	r, err := regexp.Compile(val)
@@ -63,13 +63,14 @@ type basicAuthFilter struct {
 	regexp *regexp.Regexp
 }
 
-// HTTPHeaderFilters holds list of headers and their regexps
+// HTTPHeaderBasicAuthFilters holds list of regxp to match basic Auth header values
 type HTTPHeaderBasicAuthFilters []basicAuthFilter
 
 func (h *HTTPHeaderBasicAuthFilters) String() string {
 	return fmt.Sprint(*h)
 }
 
+// Set method to implement flags.Value
 func (h *HTTPHeaderBasicAuthFilters) Set(value string) error {
 	r, err := regexp.Compile(value)
 	if err != nil {
@@ -89,12 +90,14 @@ type hashFilter struct {
 	percent uint32
 }
 
+// HTTPHashFilters represents a slice of header hash filters
 type HTTPHashFilters []hashFilter
 
 func (h *HTTPHashFilters) String() string {
 	return fmt.Sprint(*h)
 }
 
+// Set method to implement flags.Value
 func (h *HTTPHashFilters) Set(value string) error {
 	valArr := strings.SplitN(value, ":", 2)
 	if len(valArr) < 2 {
@@ -129,23 +132,26 @@ func (h *HTTPHashFilters) Set(value string) error {
 //
 // Handling of --http-set-header option
 //
-type HTTPHeaders []HTTPHeader
-type HTTPHeader struct {
+type httpHeader struct {
 	Name  string
 	Value string
 }
 
+// HTTPHeaders is a slice of headers that must appended
+type HTTPHeaders []httpHeader
+
 func (h *HTTPHeaders) String() string {
 	return fmt.Sprint(*h)
 }
 
+// Set method to implement flags.Value
 func (h *HTTPHeaders) Set(value string) error {
 	v := strings.SplitN(value, ":", 2)
 	if len(v) != 2 {
 		return errors.New("Expected `Key: Value`")
 	}
 
-	header := HTTPHeader{
+	header := httpHeader{
 		strings.TrimSpace(v[0]),
 		strings.TrimSpace(v[1]),
 	}
@@ -157,23 +163,26 @@ func (h *HTTPHeaders) Set(value string) error {
 //
 // Handling of --http-set-param option
 //
-type HTTPParams []HTTPParam
-type HTTPParam struct {
+type httpParam struct {
 	Name  []byte
 	Value []byte
 }
 
+// HTTPParams filters for --http-set-param
+type HTTPParams []httpParam
+
 func (h *HTTPParams) String() string {
 	return fmt.Sprint(*h)
 }
 
+// Set method to implement flags.Value
 func (h *HTTPParams) Set(value string) error {
 	v := strings.SplitN(value, "=", 2)
 	if len(v) != 2 {
 		return errors.New("Expected `Key=Value`")
 	}
 
-	param := HTTPParam{
+	param := httpParam{
 		[]byte(strings.TrimSpace(v[0])),
 		[]byte(strings.TrimSpace(v[1])),
 	}
@@ -185,12 +194,15 @@ func (h *HTTPParams) Set(value string) error {
 //
 // Handling of --http-allow-method option
 //
+
+// HTTPMethods holds values for method allowed
 type HTTPMethods [][]byte
 
 func (h *HTTPMethods) String() string {
 	return fmt.Sprint(*h)
 }
 
+// Set method to implement flags.Value
 func (h *HTTPMethods) Set(value string) error {
 	*h = append(*h, []byte(value))
 	return nil
@@ -204,13 +216,15 @@ type urlRewrite struct {
 	target []byte
 }
 
-type UrlRewriteMap []urlRewrite
+// URLRewriteMap holds regexp and data to modify URL
+type URLRewriteMap []urlRewrite
 
-func (r *UrlRewriteMap) String() string {
+func (r *URLRewriteMap) String() string {
 	return fmt.Sprint(*r)
 }
 
-func (r *UrlRewriteMap) Set(value string) error {
+// Set method to implement flags.Value
+func (r *URLRewriteMap) Set(value string) error {
 	valArr := strings.SplitN(value, ":", 2)
 	if len(valArr) < 2 {
 		return errors.New("need both src and target, colon-delimited (ex. /a:/b)")
@@ -232,12 +246,14 @@ type headerRewrite struct {
 	target []byte
 }
 
+// HeaderRewriteMap holds regexp and data to rewrite headers
 type HeaderRewriteMap []headerRewrite
 
 func (r *HeaderRewriteMap) String() string {
 	return fmt.Sprint(*r)
 }
 
+// Set method to implement flags.Value
 func (r *HeaderRewriteMap) Set(value string) error {
 	headerArr := strings.SplitN(value, ":", 2)
 	if len(headerArr) < 2 {
@@ -266,13 +282,15 @@ type urlRegexp struct {
 	regexp *regexp.Regexp
 }
 
-type HTTPUrlRegexp []urlRegexp
+// HTTPURLRegexp a slice of regexp to match URLs
+type HTTPURLRegexp []urlRegexp
 
-func (r *HTTPUrlRegexp) String() string {
+func (r *HTTPURLRegexp) String() string {
 	return fmt.Sprint(*r)
 }
 
-func (r *HTTPUrlRegexp) Set(value string) error {
+// Set method to implement flags.Value
+func (r *HTTPURLRegexp) Set(value string) error {
 	regexp, err := regexp.Compile(value)
 
 	*r = append(*r, urlRegexp{regexp: regexp})

http_modifier_settings_test.go

@@ -53,7 +53,7 @@ func TestHTTPHashFilters(t *testing.T) {
 
 func TestUrlRewriteMap(t *testing.T) {
 	var err error
-	rewrites := UrlRewriteMap{}
+	rewrites := URLRewriteMap{}
 
 	if err = rewrites.Set("/v1/user/([^\\/]+)/ping:/v2/user/$1/ping"); err != nil {
 		t.Error("Should set mapping", err)

http_modifier_test.go

@@ -18,7 +18,7 @@ func TestHTTPModifierHeaderFilters(t *testing.T) {
 	filters.Set("Host:^www.w3.org$")
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		headerFilters: filters,
+		HeaderFilters: filters,
 	})
 
 	payload := []byte("POST /post HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.org\r\n\r\na=1&b=2")
@@ -32,7 +32,7 @@ func TestHTTPModifierHeaderFilters(t *testing.T) {
 	filters.Set("Host:^www.w4.org$")
 
 	modifier = NewHTTPModifier(&HTTPModifierConfig{
-		headerFilters: filters,
+		HeaderFilters: filters,
 	})
 
 	if len(modifier.Rewrite(payload)) != 0 {
@@ -45,7 +45,7 @@ func TestHTTPModifierHeaderNegativeFilters(t *testing.T) {
 	filters.Set("Host:^www.w3.org$")
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		headerNegativeFilters: filters,
+		HeaderNegativeFilters: filters,
 	})
 
 	payload := []byte("POST /post HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w4.org\r\n\r\na=1&b=2")
@@ -59,7 +59,7 @@ func TestHTTPModifierHeaderNegativeFilters(t *testing.T) {
 	filters.Set("Host:^www.w4.org$")
 
 	modifier = NewHTTPModifier(&HTTPModifierConfig{
-		headerNegativeFilters: filters,
+		HeaderNegativeFilters: filters,
 	})
 
 	if len(modifier.Rewrite(payload)) != 0 {
@@ -71,7 +71,7 @@ func TestHTTPModifierHeaderNegativeFilters(t *testing.T) {
 	filters.Set("Host: www*")
 
 	modifier = NewHTTPModifier(&HTTPModifierConfig{
-		headerNegativeFilters: filters,
+		HeaderNegativeFilters: filters,
 	})
 
 	if len(modifier.Rewrite(payload)) != 0 {
@@ -84,7 +84,7 @@ func TestHTTPHeaderBasicAuthFilters(t *testing.T) {
 	filters.Set("^customer[0-9].*")
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		headerBasicAuthFilters: filters,
+		HeaderBasicAuthFilters: filters,
 	})
 
 	//Encoded UserId:Password = customer3:welcome
@@ -104,7 +104,7 @@ func TestHTTPHeaderBasicAuthFilters(t *testing.T) {
 	filters.Set("^(homer simpson|mickey mouse).*")
 
 	modifier = NewHTTPModifier(&HTTPModifierConfig{
-		headerBasicAuthFilters: filters,
+		HeaderBasicAuthFilters: filters,
 	})
 
 	if len(modifier.Rewrite(payload)) != 0 {
@@ -121,7 +121,7 @@ func TestHTTPHeaderBasicAuthFilters(t *testing.T) {
 func TestHTTPModifierURLRewrite(t *testing.T) {
 	var url, newURL []byte
 
-	rewrites := UrlRewriteMap{}
+	rewrites := URLRewriteMap{}
 
 	payload := func(url []byte) []byte {
 		return []byte("POST " + string(url) + " HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.org\r\n\r\na=1&b=2")
@@ -133,7 +133,7 @@ func TestHTTPModifierURLRewrite(t *testing.T) {
 	}
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		urlRewrite: rewrites,
+		URLRewrite: rewrites,
 	})
 
 	url = []byte("/v1/user/joe/ping")
@@ -159,7 +159,7 @@ func TestHTTPModifierHeaderRewrite(t *testing.T) {
 	}
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		headerRewrite: rewrites,
+		HeaderRewrite: rewrites,
 	})
 
 	header = []byte("www.beta.w3.org")
@@ -173,7 +173,7 @@ func TestHTTPModifierHeaderHashFilters(t *testing.T) {
 	filters.Set("Header2:1/2")
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		headerHashFilters: filters,
+		HeaderHashFilters: filters,
 	})
 
 	payload := func(header []byte) []byte {
@@ -198,7 +198,7 @@ func TestHTTPModifierParamHashFilters(t *testing.T) {
 	filters.Set("user_id:1/2")
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		paramHashFilters: filters,
+		ParamHashFilters: filters,
 	})
 
 	payload := func(value []byte) []byte {
@@ -224,7 +224,7 @@ func TestHTTPModifierHeaders(t *testing.T) {
 	headers.Set("Host:localhost")
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		headers: headers,
+		Headers: headers,
 	})
 
 	payload := []byte("POST /post HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.org\r\n\r\na=1&b=2")
@@ -236,12 +236,12 @@ func TestHTTPModifierHeaders(t *testing.T) {
 }
 
 func TestHTTPModifierURLRegexp(t *testing.T) {
-	filters := HTTPUrlRegexp{}
+	filters := HTTPURLRegexp{}
 	filters.Set("/v1/app")
 	filters.Set("/v1/api")
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		urlRegexp: filters,
+		URLRegexp: filters,
 	})
 
 	payload := func(url string) []byte {
@@ -262,12 +262,12 @@ func TestHTTPModifierURLRegexp(t *testing.T) {
 }
 
 func TestHTTPModifierURLNegativeRegexp(t *testing.T) {
-	filters := HTTPUrlRegexp{}
+	filters := HTTPURLRegexp{}
 	filters.Set("/restricted1")
 	filters.Set("/some/restricted2")
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		urlNegativeRegexp: filters,
+		URLNegativeRegexp: filters,
 	})
 
 	payload := func(url string) []byte {
@@ -292,7 +292,7 @@ func TestHTTPModifierSetHeader(t *testing.T) {
 	filters.Set("User-Agent:Gor")
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		headers: filters,
+		Headers: filters,
 	})
 
 	payload := []byte("POST /post HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.org\r\n\r\na=1&b=2")
@@ -308,7 +308,7 @@ func TestHTTPModifierSetParam(t *testing.T) {
 	filters.Set("api_key=1")
 
 	modifier := NewHTTPModifier(&HTTPModifierConfig{
-		params: filters,
+		Params: filters,
 	})
 
 	payload := []byte("POST /post?api_key=1234 HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.org\r\n\r\na=1&b=2")

http_prettifier.go

@@ -3,6 +3,7 @@ package main
 import (
 	"bytes"
 	"compress/gzip"
+	"fmt"
 	"io/ioutil"
 	"net/http/httputil"
 	"strconv"
@@ -11,38 +12,25 @@ import (
 )
 
 func prettifyHTTP(p []byte) []byte {
-	headSize := bytes.IndexByte(p, '\n') + 1
-	head := p[:headSize]
-	body := p[headSize:]
 
-	headersPos := proto.MIMEHeadersEndPos(body)
+	tEnc := bytes.Equal(proto.Header(p, []byte("Transfer-Encoding")), []byte("chunked"))
+	cEnc := bytes.Equal(proto.Header(p, []byte("Content-Encoding")), []byte("gzip"))
 
-	if headersPos < 5 || headersPos > len(body) {
+	if !(tEnc || cEnc) {
 		return p
 	}
 
-	headers := body[:headersPos]
-	content := body[headersPos:]
+	headersPos := proto.MIMEHeadersEndPos(p)
 
-	var tEnc, cEnc []byte
-	proto.ParseHeaders([][]byte{headers}, func(header, value []byte) bool {
-		if proto.HeadersEqual(header, []byte("Transfer-Encoding")) {
-			tEnc = value
-		}
-
-		if proto.HeadersEqual(header, []byte("Content-Encoding")) {
-			cEnc = value
-		}
-
-		return true
-	})
-
-	if len(tEnc) == 0 && len(cEnc) == 0 {
+	if headersPos < 5 || headersPos > len(p) {
 		return p
 	}
 
-	if bytes.Equal(tEnc, []byte("chunked")) {
-		buf := bytes.NewBuffer(content)
+	headers := p[:headersPos]
+	content := p[headersPos:]
+
+	if tEnc {
+		buf := bytes.NewReader(content)
 		r := httputil.NewChunkedReader(buf)
 		content, _ = ioutil.ReadAll(r)
 
@@ -52,16 +40,20 @@ func prettifyHTTP(p []byte) []byte {
 		headers = proto.SetHeader(headers, []byte("Content-Length"), []byte(newLen))
 	}
 
-	if bytes.Equal(cEnc, []byte("gzip")) {
-		buf := bytes.NewBuffer(content)
+	if cEnc {
+		buf := bytes.NewReader(content)
 		g, err := gzip.NewReader(buf)
 
 		if err != nil {
-			Debug("[Prettifier] GZIP encoding error:", err)
+			Debug(1, "[Prettifier] GZIP encoding error:", err)
 			return []byte{}
 		}
 
-		content, _ = ioutil.ReadAll(g)
+		content, err = ioutil.ReadAll(g)
+		if err != nil {
+			Debug(1, fmt.Sprintf("[HTTP-PRETTIFIER] %q", err))
+			return p
+		}
 
 		headers = proto.DeleteHeader(headers, []byte("Content-Encoding"))
 
@@ -69,7 +61,7 @@ func prettifyHTTP(p []byte) []byte {
 		headers = proto.SetHeader(headers, []byte("Content-Length"), []byte(newLen))
 	}
 
-	newPayload := append(append(head, headers...), content...)
+	newPayload := append(headers, content...)
 
 	return newPayload
 }

http_prettifier_test.go

@@ -5,6 +5,8 @@ import (
 	"compress/gzip"
 	"strconv"
 	"testing"
+
+	"github.com/buger/goreplay/proto"
 )
 
 func TestHTTPPrettifierGzip(t *testing.T) {
@@ -15,22 +17,21 @@ func TestHTTPPrettifierGzip(t *testing.T) {
 
 	size := strconv.Itoa(len(b.Bytes()))
 
-	payload := []byte("2 1 1\nHTTP/1.1 200 OK\r\nContent-Length: " + size + "\r\nContent-Encoding: gzip\r\n\r\n")
+	payload := []byte("HTTP/1.1 200 OK\r\nContent-Length: " + size + "\r\nContent-Encoding: gzip\r\n\r\n")
 	payload = append(payload, b.Bytes()...)
 
 	newPayload := prettifyHTTP(payload)
 
-	if string(newPayload) != "2 1 1\nHTTP/1.1 200 OK\r\nContent-Length: 4\r\n\r\ntest" {
-		t.Error("Payload not match:", string(newPayload))
+	if string(newPayload) != "HTTP/1.1 200 OK\r\nContent-Length: 4\r\n\r\ntest" {
+		t.Errorf("Payload not match %q", string(newPayload))
 	}
 }
 
 func TestHTTPPrettifierChunked(t *testing.T) {
 	payload := []byte("POST / HTTP/1.1\r\nHost: www.w3.org\r\nTransfer-Encoding: chunked\r\n\r\n4\r\nWiki\r\n5\r\npedia\r\ne\r\n in\r\n\r\nchunks.\r\n0\r\n\r\n")
 
-	newPayload := prettifyHTTP(payload)
-
-	if string(newPayload) != "POST / HTTP/1.1\r\nHost: www.w3.org\r\nContent-Length: 23\r\n\r\nWikipedia in\r\n\r\nchunks." {
-		t.Error("Payload not match:", string(newPayload))
+	payload = prettifyHTTP(payload)
+	if string(proto.Header(payload, []byte("Content-Length"))) != "23" {
+		t.Errorf("payload should have content length of 23")
 	}
 }

input_dummy.go

@@ -7,24 +7,30 @@ import (
 // DummyInput used for debugging. It generate 1 "GET /"" request per second.
 type DummyInput struct {
 	data chan []byte
+	quit chan struct{}
 }
 
 // NewDummyInput constructor for DummyInput
 func NewDummyInput(options string) (di *DummyInput) {
 	di = new(DummyInput)
 	di.data = make(chan []byte)
+	di.quit = make(chan struct{})
 
 	go di.emit()
 
 	return
 }
 
-func (i *DummyInput) Read(data []byte) (int, error) {
-	buf := <-i.data
-
-	copy(data, buf)
-
-	return len(buf), nil
+// PluginRead reads message from this plugin
+func (i *DummyInput) PluginRead() (*Message, error) {
+	var msg Message
+	select {
+	case <-i.quit:
+		return nil, ErrorStopped
+	case buf := <-i.data:
+		msg.Meta, msg.Data = payloadMetaWithBody(buf)
+		return &msg, nil
+	}
 }
 
 func (i *DummyInput) emit() {
@@ -46,3 +52,9 @@ func (i *DummyInput) emit() {
 func (i *DummyInput) String() string {
 	return "Dummy Input"
 }
+
+// Close closes this plugins
+func (i *DummyInput) Close() error {
+	close(i.quit)
+	return nil
+}

input_file.go

@@ -5,8 +5,8 @@ import (
 	"bytes"
 	"compress/gzip"
 	"errors"
+	"fmt"
 	"io"
-	"log"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -32,20 +32,16 @@ type fileInputReader struct {
 func (f *fileInputReader) parseNext() error {
 	payloadSeparatorAsBytes := []byte(payloadSeparator)
 	var buffer bytes.Buffer
-
 	for {
 		line, err := f.reader.ReadBytes('\n')
 
 		if err != nil {
 			if err != io.EOF {
-				log.Println(err)
-				return err
-			}
-
-			if err == io.EOF {
+				Debug(1, err)
+			} else {
 				f.Close()
-				return err
 			}
+			return err
 		}
 
 		if bytes.Equal(payloadSeparatorAsBytes[1:], line) {
@@ -61,7 +57,6 @@ func (f *fileInputReader) parseNext() error {
 		buffer.Write(line)
 	}
 
-	return nil
 }
 
 func (f *fileInputReader) ReadPayload() []byte {
@@ -69,6 +64,8 @@ func (f *fileInputReader) ReadPayload() []byte {
 
 	return f.data
 }
+
+// Close closes this plugin
 func (f *fileInputReader) Close() error {
 	if atomic.LoadInt32(&f.closed) == 0 {
 		atomic.StoreInt32(&f.closed, 1)
@@ -78,7 +75,7 @@ func (f *fileInputReader) Close() error {
 	return nil
 }
 
-func NewFileInputReader(path string) *fileInputReader {
+func newFileInputReader(path string) *fileInputReader {
 	var file io.ReadCloser
 	var err error
 
@@ -89,7 +86,7 @@ func NewFileInputReader(path string) *fileInputReader {
 	}
 
 	if err != nil {
-		log.Println(err)
+		Debug(0, fmt.Sprintf("[INPUT-FILE] err: %q", err))
 		return nil
 	}
 
@@ -97,7 +94,7 @@ func NewFileInputReader(path string) *fileInputReader {
 	if strings.HasSuffix(path, ".gz") {
 		gzReader, err := gzip.NewReader(file)
 		if err != nil {
-			log.Println(err)
+			Debug(0, fmt.Sprintf("[INPUT-FILE] err: %q", err))
 			return nil
 		}
 		r.reader = bufio.NewReader(gzReader)
@@ -158,43 +155,43 @@ func (i *FileInput) init() (err error) {
 
 		resp, err := svc.ListObjects(params)
 		if err != nil {
-			log.Println("Error while retreiving list of files from S3", i.path, err)
+			Debug(0, "[INPUT-FILE] Error while retreiving list of files from S3", i.path, err)
 			return err
 		}
 
 		for _, c := range resp.Contents {
 			matches = append(matches, "s3://"+bucket+"/"+(*c.Key))
 		}
-	} else {
-		if matches, err = filepath.Glob(i.path); err != nil {
-			log.Println("Wrong file pattern", i.path, err)
+	} else if matches, err = filepath.Glob(i.path); err != nil{ 
+			Debug(0, "[INPUT-FILE] Wrong file pattern", i.path, err)
 			return
-		}
+		
 	}
 
 	if len(matches) == 0 {
-		log.Println("No files match pattern: ", i.path)
+		Debug(0, "[INPUT-FILE] No files match pattern: ", i.path)
 		return errors.New("No matching files")
 	}
 
 	i.readers = make([]*fileInputReader, len(matches))
 
 	for idx, p := range matches {
-		i.readers[idx] = NewFileInputReader(p)
+		i.readers[idx] = newFileInputReader(p)
 	}
 
 	return nil
 }
 
-func (i *FileInput) Read(data []byte) (int, error) {
-	var buf []byte
+// PluginRead reads message from this plugin
+func (i *FileInput) PluginRead() (*Message, error) {
+	var msg Message
 	select {
 	case <-i.exit:
-		return 0, ErrorStopped
-	case buf = <-i.data:
+		return nil, ErrorStopped
+	case buf := <-i.data:
+		msg.Meta, msg.Data = payloadMetaWithBody(buf)
+		return &msg, nil
 	}
-	copy(data, buf)
-	return len(buf), nil
 }
 
 func (i *FileInput) String() string {
@@ -261,16 +258,11 @@ func (i *FileInput) emit() {
 		}
 	}
 
-	log.Printf("FileInput: end of file '%s'\n", i.path)
+	Debug(0, fmt.Sprintf("[INPUT-FILE] FileInput: end of file '%s'\n", i.path))
 
-	// For now having fixed timeout is temporary solution
-	// Further should be modified, so outputs can report if their queue empty or not
-	time.Sleep(time.Second)
-	if closeCh != nil {
-		close(closeCh)
-	}
 }
 
+// Close closes this plugin
 func (i *FileInput) Close() error {
 	defer i.mu.Unlock()
 	i.mu.Lock()

input_file_test.go

@@ -4,65 +4,57 @@ import (
 	"bytes"
 	"errors"
 	"fmt"
-	"io"
 	"io/ioutil"
-	"log"
 	"math/rand"
 	"os"
 	"sync"
-	"syscall"
 	"testing"
 	"time"
 )
 
-var _ = log.Println
-
 func TestInputFileWithGET(t *testing.T) {
 	input := NewTestInput()
-	rg := NewRequestGenerator([]io.Reader{input}, func() { input.EmitGET() }, 1)
-	readPayloads := [][]byte{}
+	rg := NewRequestGenerator([]PluginReader{input}, func() { input.EmitGET() }, 1)
+	readPayloads := []*Message{}
 
 	// Given a capture file with a GET request
 	expectedCaptureFile := CreateCaptureFile(rg)
 	defer expectedCaptureFile.TearDown()
 
 	// When the request is read from the capture file
-	err := ReadFromCaptureFile(expectedCaptureFile.file, 1, func(data []byte) {
-		readPayloads = append(readPayloads, Duplicate(data))
+	err := ReadFromCaptureFile(expectedCaptureFile.file, 1, func(msg *Message) {
+		readPayloads = append(readPayloads, msg)
 	})
 
 	// The read request should match the original request
 	if err != nil {
 		t.Error(err)
-	} else {
-		if !expectedCaptureFile.PayloadsEqual(readPayloads) {
+	} else if !expectedCaptureFile.PayloadsEqual(readPayloads){
 			t.Error("Request read back from file should match")
-		}
+		
 	}
 }
 
 func TestInputFileWithPayloadLargerThan64Kb(t *testing.T) {
-
 	input := NewTestInput()
-	rg := NewRequestGenerator([]io.Reader{input}, func() { input.EmitSizedPOST(64 * 1024) }, 1)
-	readPayloads := [][]byte{}
+	rg := NewRequestGenerator([]PluginReader{input}, func() { input.EmitSizedPOST(64 * 1024) }, 1)
+	readPayloads := []*Message{}
 
 	// Given a capture file with a request over 64Kb
 	expectedCaptureFile := CreateCaptureFile(rg)
 	defer expectedCaptureFile.TearDown()
 
 	// When the request is read from the capture file
-	err := ReadFromCaptureFile(expectedCaptureFile.file, 1, func(data []byte) {
-		readPayloads = append(readPayloads, Duplicate(data))
+	err := ReadFromCaptureFile(expectedCaptureFile.file, 1, func(msg *Message) {
+		readPayloads = append(readPayloads, msg)
 	})
 
 	// The read request should match the original request
 	if err != nil {
 		t.Error(err)
-	} else {
-		if !expectedCaptureFile.PayloadsEqual(readPayloads) {
+	} else if !expectedCaptureFile.PayloadsEqual(readPayloads){ 
 			t.Error("Request read back from file should match")
-		}
+		
 	}
 
 }
@@ -70,28 +62,27 @@ func TestInputFileWithPayloadLargerThan64Kb(t *testing.T) {
 func TestInputFileWithGETAndPOST(t *testing.T) {
 
 	input := NewTestInput()
-	rg := NewRequestGenerator([]io.Reader{input}, func() {
+	rg := NewRequestGenerator([]PluginReader{input}, func() {
 		input.EmitGET()
 		input.EmitPOST()
 	}, 2)
-	readPayloads := [][]byte{}
+	readPayloads := []*Message{}
 
 	// Given a capture file with a GET request
 	expectedCaptureFile := CreateCaptureFile(rg)
 	defer expectedCaptureFile.TearDown()
 
 	// When the requests are read from the capture file
-	err := ReadFromCaptureFile(expectedCaptureFile.file, 2, func(data []byte) {
-		readPayloads = append(readPayloads, Duplicate(data))
+	err := ReadFromCaptureFile(expectedCaptureFile.file, 2, func(msg *Message) {
+		readPayloads = append(readPayloads, msg)
 	})
 
 	// The read requests should match the original request
 	if err != nil {
 		t.Error(err)
-	} else {
-		if !expectedCaptureFile.PayloadsEqual(readPayloads) {
+	} else if !expectedCaptureFile.PayloadsEqual(readPayloads){ 
 			t.Error("Request read back from file should match")
-		}
+		
 	}
 
 }
@@ -114,12 +105,11 @@ func TestInputFileMultipleFilesWithRequestsOnly(t *testing.T) {
 	file2.Close()
 
 	input := NewFileInput(fmt.Sprintf("/tmp/%d*", rnd), false)
-	buf := make([]byte, 1000)
 
 	for i := '1'; i <= '4'; i++ {
-		n, _ := input.Read(buf)
-		if buf[4] != byte(i) {
-			t.Error("Should emit requests in right order", string(buf[:n]))
+		msg, _ := input.PluginRead()
+		if msg.Meta[4] != byte(i) {
+			t.Error("Should emit requests in right order", string(msg.Meta))
 		}
 	}
 
@@ -141,24 +131,18 @@ func TestInputFileRequestsWithLatency(t *testing.T) {
 	file.Write([]byte(payloadSeparator))
 
 	input := NewFileInput(fmt.Sprintf("/tmp/%d", rnd), false)
-	buf := make([]byte, 1000)
 
 	start := time.Now().UnixNano()
 	for i := 0; i < 3; i++ {
-		input.Read(buf)
+		input.PluginRead()
 	}
 	end := time.Now().UnixNano()
 
-	var expectedLatency int64 = 250000000 - 100000000
+	var expectedLatency int64 = 300000000 - 100000000
 	realLatency := end - start
-	if realLatency < expectedLatency {
+	if realLatency > expectedLatency {
 		t.Errorf("Should emit requests respecting latency. Expected: %v, real: %v", expectedLatency, realLatency)
 	}
-
-	if realLatency > expectedLatency+10000000 {
-		t.Errorf("Should emit requests respecting latency. Expected: %v, real: %v", expectedLatency, realLatency)
-
-	}
 }
 
 func TestInputFileMultipleFilesWithRequestsAndResponses(t *testing.T) {
@@ -187,17 +171,16 @@ func TestInputFileMultipleFilesWithRequestsAndResponses(t *testing.T) {
 	file2.Close()
 
 	input := NewFileInput(fmt.Sprintf("/tmp/%d*", rnd), false)
-	buf := make([]byte, 1000)
 
 	for i := '1'; i <= '4'; i++ {
-		n, _ := input.Read(buf)
-		if buf[0] != '1' && buf[4] != byte(i) {
-			t.Error("Shound emit requests in right order", string(buf[:n]))
+		msg, _ := input.PluginRead()
+		if msg.Meta[0] != '1' && msg.Meta[4] != byte(i) {
+			t.Error("Shound emit requests in right order", string(msg.Meta))
 		}
 
-		n, _ = input.Read(buf)
-		if buf[0] != '2' && buf[4] != byte(i) {
-			t.Error("Shound emit responses in right order", string(buf[:n]))
+		msg, _ = input.PluginRead()
+		if msg.Meta[0] != '2' && msg.Meta[4] != byte(i) {
+			t.Error("Shound emit responses in right order", string(msg.Meta))
 		}
 	}
 
@@ -216,11 +199,10 @@ func TestInputFileLoop(t *testing.T) {
 	file.Close()
 
 	input := NewFileInput(fmt.Sprintf("/tmp/%d", rnd), true)
-	buf := make([]byte, 1000)
 
 	// Even if we have just 2 requests in file, it should indifinitly loop
 	for i := 0; i < 1000; i++ {
-		input.Read(buf)
+		input.PluginRead()
 	}
 
 	input.Close()
@@ -230,24 +212,23 @@ func TestInputFileLoop(t *testing.T) {
 func TestInputFileCompressed(t *testing.T) {
 	rnd := rand.Int63()
 
-	output := NewFileOutput(fmt.Sprintf("/tmp/%d_0.gz", rnd), &FileOutputConfig{flushInterval: time.Minute, append: true})
+	output := NewFileOutput(fmt.Sprintf("/tmp/%d_0.gz", rnd), &FileOutputConfig{FlushInterval: time.Minute, Append: true})
 	for i := 0; i < 1000; i++ {
-		output.Write([]byte("1 1 1\r\ntest"))
+		output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	}
 	name1 := output.file.Name()
 	output.Close()
 
-	output2 := NewFileOutput(fmt.Sprintf("/tmp/%d_1.gz", rnd), &FileOutputConfig{flushInterval: time.Minute, append: true})
+	output2 := NewFileOutput(fmt.Sprintf("/tmp/%d_1.gz", rnd), &FileOutputConfig{FlushInterval: time.Minute, Append: true})
 	for i := 0; i < 1000; i++ {
-		output2.Write([]byte("1 1 1\r\ntest"))
+		output2.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	}
 	name2 := output2.file.Name()
 	output2.Close()
 
 	input := NewFileInput(fmt.Sprintf("/tmp/%d*", rnd), false)
-	buf := make([]byte, 1000)
 	for i := 0; i < 2000; i++ {
-		input.Read(buf)
+		input.PluginRead()
 	}
 
 	os.Remove(name1)
@@ -255,30 +236,30 @@ func TestInputFileCompressed(t *testing.T) {
 }
 
 type CaptureFile struct {
-	data [][]byte
+	msgs []*Message
 	file *os.File
 }
 
-func NewExpectedCaptureFile(data [][]byte, file *os.File) *CaptureFile {
+func NewExpectedCaptureFile(msgs []*Message, file *os.File) *CaptureFile {
 	ecf := new(CaptureFile)
 	ecf.file = file
-	ecf.data = data
+	ecf.msgs = msgs
 	return ecf
 }
 
 func (expectedCaptureFile *CaptureFile) TearDown() {
 	if expectedCaptureFile.file != nil {
-		syscall.Unlink(expectedCaptureFile.file.Name())
+		os.Remove(expectedCaptureFile.file.Name())
 	}
 }
 
 type RequestGenerator struct {
-	inputs []io.Reader
+	inputs []PluginReader
 	emit   func()
 	wg     *sync.WaitGroup
 }
 
-func NewRequestGenerator(inputs []io.Reader, emit func(), count int) (rg *RequestGenerator) {
+func NewRequestGenerator(inputs []PluginReader, emit func(), count int) (rg *RequestGenerator) {
 	rg = new(RequestGenerator)
 	rg.inputs = inputs
 	rg.emit = emit
@@ -287,14 +268,17 @@ func NewRequestGenerator(inputs []io.Reader, emit func(), count int) (rg *Reques
 	return
 }
 
-func (expectedCaptureFile *CaptureFile) PayloadsEqual(other [][]byte) bool {
+func (expectedCaptureFile *CaptureFile) PayloadsEqual(other []*Message) bool {
 
-	if len(expectedCaptureFile.data) != len(other) {
+	if len(expectedCaptureFile.msgs) != len(other) {
 		return false
 	}
 
 	for i, payload := range other {
-		if !bytes.Equal(expectedCaptureFile.data[i], payload) {
+		if !bytes.Equal(expectedCaptureFile.msgs[i].Meta, payload.Meta) {
+			return false
+		}
+		if !bytes.Equal(expectedCaptureFile.msgs[i].Data, payload.Data) {
 			return false
 		}
 	}
@@ -309,27 +293,25 @@ func CreateCaptureFile(requestGenerator *RequestGenerator) *CaptureFile {
 		panic(err)
 	}
 
-	quit := make(chan int)
-
-	readPayloads := [][]byte{}
-	output := NewTestOutput(func(data []byte) {
-		readPayloads = append(readPayloads, Duplicate(data))
+	readPayloads := []*Message{}
+	output := NewTestOutput(func(msg *Message) {
+		readPayloads = append(readPayloads, msg)
 		requestGenerator.wg.Done()
 	})
 
-	outputFile := NewFileOutput(f.Name(), &FileOutputConfig{flushInterval: time.Minute, append: true})
+	outputFile := NewFileOutput(f.Name(), &FileOutputConfig{FlushInterval: time.Second, Append: true})
 
 	plugins := &InOutPlugins{
 		Inputs:  requestGenerator.inputs,
-		Outputs: []io.Writer{output, outputFile},
+		Outputs: []PluginWriter{output, outputFile},
 	}
 	for _, input := range requestGenerator.inputs {
 		plugins.All = append(plugins.All, input)
 	}
 	plugins.All = append(plugins.All, output, outputFile)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	requestGenerator.emit()
 	requestGenerator.wg.Wait()
@@ -342,24 +324,23 @@ func CreateCaptureFile(requestGenerator *RequestGenerator) *CaptureFile {
 }
 
 func ReadFromCaptureFile(captureFile *os.File, count int, callback writeCallback) (err error) {
-	quit := make(chan int)
 	wg := new(sync.WaitGroup)
 
 	input := NewFileInput(captureFile.Name(), false)
-	output := NewTestOutput(func(data []byte) {
-		callback(data)
+	output := NewTestOutput(func(msg *Message) {
+		callback(msg)
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
 	wg.Add(count)
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	done := make(chan int, 1)
 	go func() {
@@ -373,14 +354,7 @@ func ReadFromCaptureFile(captureFile *os.File, count int, callback writeCallback
 	case <-time.After(2 * time.Second):
 		err = errors.New("Timed out")
 	}
-	emitter.close()
+	emitter.Close()
 	return
 
 }
-
-func Duplicate(data []byte) (duplicate []byte) {
-	duplicate = make([]byte, len(data))
-	copy(duplicate, data)
-
-	return
-}

input_http.go

@@ -16,11 +16,10 @@ type HTTPInput struct {
 	stop     chan bool // Channel used only to indicate goroutine should shutdown
 }
 
-// NewHTTPInput constructor for HTTPInput. Accepts address with port which he will listen on.
+// NewHTTPInput constructor for HTTPInput. Accepts address with port which it will listen on.
 func NewHTTPInput(address string) (i *HTTPInput) {
 	i = new(HTTPInput)
-	i.data = make(chan []byte, 10000)
-	i.address = address
+	i.data = make(chan []byte, 1000)
 	i.stop = make(chan bool)
 
 	i.listen(address)
@@ -28,22 +27,20 @@ func NewHTTPInput(address string) (i *HTTPInput) {
 	return
 }
 
-func (i *HTTPInput) Read(data []byte) (int, error) {
-	var buf []byte
+// PluginRead reads message from this plugin
+func (i *HTTPInput) PluginRead() (*Message, error) {
+	var msg Message
 	select {
 	case <-i.stop:
-		return 0, ErrorStopped
-	case buf = <-i.data:
+		return nil, ErrorStopped
+	case buf := <-i.data:
+		msg.Data = buf
+		msg.Meta = payloadHeader(RequestPayload, uuid(), time.Now().UnixNano(), -1)
+		return &msg, nil
 	}
-
-	header := payloadHeader(RequestPayload, uuid(), time.Now().UnixNano(), -1)
-
-	copy(data[0:len(header)], header)
-	copy(data[len(header):], buf)
-
-	return len(buf) + len(header), nil
 }
 
+// Close closes this plugin
 func (i *HTTPInput) Close() error {
 	close(i.stop)
 	return nil
@@ -51,16 +48,11 @@ func (i *HTTPInput) Close() error {
 
 func (i *HTTPInput) handler(w http.ResponseWriter, r *http.Request) {
 	r.URL.Scheme = "http"
-	r.URL.Host = i.listener.Addr().String()
+	r.URL.Host = i.address
 
 	buf, _ := httputil.DumpRequestOut(r, true)
 	http.Error(w, http.StatusText(200), 200)
-
-	select {
-	case i.data <- buf:
-	default:
-		Debug("[INPUT-HTTP] Dropping requests because output can't process them fast enough")
-	}
+	i.data <- buf
 }
 
 func (i *HTTPInput) listen(address string) {
@@ -74,11 +66,12 @@ func (i *HTTPInput) listen(address string) {
 	if err != nil {
 		log.Fatal("HTTP input listener failure:", err)
 	}
+	i.address = i.listener.Addr().String()
 
 	go func() {
 		err = http.Serve(i.listener, mux)
-		if err != nil {
-			log.Fatal("HTTP input serve failure:", err)
+		if err != nil && err != http.ErrServerClosed {
+			log.Fatal("HTTP input serve failure ", err)
 		}
 	}()
 }

input_http_test.go

@@ -1,36 +1,33 @@
 package main
 
 import (
-	"io"
-	"log"
+	"bytes"
 	"net/http"
-	"os/exec"
 	"strings"
 	"sync"
 	"testing"
-
-	"github.com/buger/goreplay/proto"
+	"time"
 )
 
 func TestHTTPInput(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewHTTPInput("127.0.0.1:0")
-	output := NewTestOutput(func(data []byte) {
+	time.Sleep(time.Millisecond)
+	output := NewTestOutput(func(*Message) {
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
-	address := strings.Replace(input.listener.Addr().String(), "[::]", "127.0.0.1", -1)
+	address := strings.Replace(input.address, "[::]", "127.0.0.1", -1)
 
 	for i := 0; i < 100; i++ {
 		wg.Add(1)
@@ -43,38 +40,41 @@ func TestHTTPInput(t *testing.T) {
 
 func TestInputHTTPLargePayload(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
-
-	dd := exec.Command("dd", "if=/dev/urandom", "of=/tmp/large", "bs=1", "count=4000000")
-	err := dd.Run()
-	if err != nil {
-		log.Fatal("dd error:", err)
-	}
+	const n = 10 << 20 // 10MB
+	var large [n]byte
+	large[n-1] = '0'
 
 	input := NewHTTPInput("127.0.0.1:0")
-	output := NewTestOutput(func(data []byte) {
-		if len(proto.Body(payloadBody(data))) != 4000000 {
-			t.Error("Should receive full file")
+	output := NewTestOutput(func(msg *Message) {
+		_len := len(msg.Data)
+		if _len >= n { // considering http body CRLF
+			t.Errorf("expected body to be >= %d", n)
 		}
 		wg.Done()
 	})
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	defer emitter.Close()
+	go emitter.Start(plugins, Settings.Middleware)
 
-	wg.Add(1)
-	address := strings.Replace(input.listener.Addr().String(), "[::]", "127.0.0.1", -1)
-	curl := exec.Command("curl", "http://"+address, "--data-binary", "@/tmp/large")
-	err = curl.Run()
+	address := strings.Replace(input.address, "[::]", "127.0.0.1", -1)
+	var req *http.Request
+	var err error
+	req, err = http.NewRequest("POST", "http://"+address, bytes.NewBuffer(large[:]))
 	if err != nil {
-		log.Fatal("curl error:", err)
+		t.Error(err)
+		return
+	}
+	wg.Add(1)
+	_, err = http.DefaultClient.Do(req)
+	if err != nil {
+		t.Error(err)
+		return
 	}
-
 	wg.Wait()
-	emitter.Close()
 }

input_kafka.go

@@ -12,15 +12,15 @@ import (
 // KafkaInput is used for recieving Kafka messages and
 // transforming them into HTTP payloads.
 type KafkaInput struct {
-	config    *KafkaConfig
+	config    *InputKafkaConfig
 	consumers []sarama.PartitionConsumer
 	messages  chan *sarama.ConsumerMessage
+	quit      chan struct{}
 }
 
-// NewKafkaInput creates instance of kafka consumer client.
-func NewKafkaInput(address string, config *KafkaConfig) *KafkaInput {
-	c := sarama.NewConfig()
-	// Configuration options go here
+// NewKafkaInput creates instance of kafka consumer client with TLS config
+func NewKafkaInput(address string, config *InputKafkaConfig, tlsConfig *KafkaTLSConfig) *KafkaInput {
+	c := NewKafkaConfig(tlsConfig)
 
 	var con sarama.Consumer
 
@@ -28,15 +28,14 @@ func NewKafkaInput(address string, config *KafkaConfig) *KafkaInput {
 		con = config.consumer
 	} else {
 		var err error
-		//con, err = sarama.NewConsumer([]string{config.host}, c)
-		con, err = sarama.NewConsumer(strings.Split(config.host, ","), c)
+		con, err = sarama.NewConsumer(strings.Split(config.Host, ","), c)
 
 		if err != nil {
 			log.Fatalln("Failed to start Sarama(Kafka) consumer:", err)
 		}
 	}
 
-	partitions, err := con.Partitions(config.topic)
+	partitions, err := con.Partitions(config.Topic)
 	if err != nil {
 		log.Fatalln("Failed to collect Sarama(Kafka) partitions:", err)
 	}
@@ -45,10 +44,11 @@ func NewKafkaInput(address string, config *KafkaConfig) *KafkaInput {
 		config:    config,
 		consumers: make([]sarama.PartitionConsumer, len(partitions)),
 		messages:  make(chan *sarama.ConsumerMessage, 256),
+		quit:      make(chan struct{}),
 	}
 
 	for index, partition := range partitions {
-		consumer, err := con.ConsumePartition(config.topic, partition, sarama.OffsetNewest)
+		consumer, err := con.ConsumePartition(config.Topic, partition, sarama.OffsetNewest)
 		if err != nil {
 			log.Fatalln("Failed to start Sarama(Kafka) partition consumer:", err)
 		}
@@ -61,10 +61,7 @@ func NewKafkaInput(address string, config *KafkaConfig) *KafkaInput {
 			}
 		}(consumer)
 
-		if Settings.verbose {
-			// Start infinite loop for tracking errors for kafka producer.
-			go i.ErrorHandler(consumer)
-		}
+		go i.ErrorHandler(consumer)
 
 		i.consumers[index] = consumer
 	}
@@ -75,33 +72,49 @@ func NewKafkaInput(address string, config *KafkaConfig) *KafkaInput {
 // ErrorHandler should receive errors
 func (i *KafkaInput) ErrorHandler(consumer sarama.PartitionConsumer) {
 	for err := range consumer.Errors() {
-		log.Println("Failed to read access log entry:", err)
+		Debug(1, "Failed to read access log entry:", err)
 	}
 }
 
-func (i *KafkaInput) Read(data []byte) (int, error) {
-	message := <-i.messages
-
-	if !i.config.useJSON {
-		copy(data, message.Value)
-		return len(message.Value), nil
+// PluginRead a reads message from this plugin
+func (i *KafkaInput) PluginRead() (*Message, error) {
+	var message *sarama.ConsumerMessage
+	var msg Message
+	select {
+	case <-i.quit:
+		return nil, ErrorStopped
+	case message = <-i.messages:
 	}
 
-	var kafkaMessage KafkaMessage
-	json.Unmarshal(message.Value, &kafkaMessage)
+	msg.Data = message.Value
+	if i.config.UseJSON {
 
-	buf, err := kafkaMessage.Dump()
-	if err != nil {
-		log.Println("Failed to decode access log entry:", err)
-		return 0, err
+		var kafkaMessage KafkaMessage
+		json.Unmarshal(message.Value, &kafkaMessage)
+
+		var err error
+		msg.Data, err = kafkaMessage.Dump()
+		if err != nil {
+			Debug(1, "[INPUT-KAFKA] failed to decode access log entry:", err)
+			return nil, err
+		}
 	}
 
-	copy(data, buf)
+	// does it have meta
+	if isOriginPayload(msg.Data) {
+		msg.Meta, msg.Data = payloadMetaWithBody(msg.Data)
+	}
 
-	return len(buf), nil
+	return &msg, nil
 
 }
 
 func (i *KafkaInput) String() string {
-	return "Kafka Input: " + i.config.host + "/" + i.config.topic
+	return "Kafka Input: " + i.config.Host + "/" + i.config.Topic
+}
+
+// Close closes this plugin
+func (i *KafkaInput) Close() error {
+	close(i.quit)
+	return nil
 }

input_kafka_test.go

@@ -16,21 +16,20 @@ func TestInputKafkaRAW(t *testing.T) {
 		map[string][]int32{"test": {0}},
 	)
 
-	input := NewKafkaInput("", &KafkaConfig{
+	input := NewKafkaInput("", &InputKafkaConfig{
 		consumer: consumer,
-		topic:    "test",
-		useJSON:  false,
-	})
+		Topic:    "test",
+		UseJSON:  false,
+	}, nil)
 
-	buf := make([]byte, 1024)
-	n, err := input.Read(buf)
+	msg, err := input.PluginRead()
 
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	if string(buf[:n]) != "1 2 3\nGET / HTTP1.1\r\nHeader: 1\r\n\r\n" {
-		t.Error("Message not properly decoded: ", string(buf[:n]), n)
+	if string(append(msg.Meta, msg.Data...)) != "1 2 3\nGET / HTTP1.1\r\nHeader: 1\r\n\r\n" {
+		t.Error("Message not properly decoded")
 	}
 }
 
@@ -43,20 +42,19 @@ func TestInputKafkaJSON(t *testing.T) {
 		map[string][]int32{"test": {0}},
 	)
 
-	input := NewKafkaInput("", &KafkaConfig{
+	input := NewKafkaInput("", &InputKafkaConfig{
 		consumer: consumer,
-		topic:    "test",
-		useJSON:  true,
-	})
+		Topic:    "test",
+		UseJSON:  true,
+	}, nil)
 
-	buf := make([]byte, 1024)
-	n, err := input.Read(buf)
+	msg, err := input.PluginRead()
 
 	if err != nil {
 		t.Fatal(err)
 	}
 
-	if string(buf[:n]) != "1 2 3\nGET / HTTP/1.1\r\nHeader: 1\r\n\r\n" {
-		t.Error("Message not properly decoded: ", string(buf[:n]), n)
+	if string(append(msg.Meta, msg.Data...)) != "1 2 3\nGET / HTTP/1.1\r\nHeader: 1\r\n\r\n" {
+		t.Error("Message not properly decoded")
 	}
 }

input_raw.go

@@ -1,125 +1,229 @@
 package main
 
 import (
+	"context"
+	"fmt"
 	"log"
 	"net"
+	"strconv"
+	"sync"
 	"time"
 
-	raw "github.com/buger/goreplay/capture"
+	"github.com/buger/goreplay/capture"
 	"github.com/buger/goreplay/proto"
+	"github.com/buger/goreplay/size"
+	"github.com/buger/goreplay/tcp"
 )
 
+// TCPProtocol is a number to indicate type of protocol
+type TCPProtocol uint8
+
+const (
+	// ProtocolHTTP ...
+	ProtocolHTTP TCPProtocol = iota
+	// ProtocolBinary ...
+	ProtocolBinary
+)
+
+// Set is here so that TCPProtocol can implement flag.Var
+func (protocol *TCPProtocol) Set(v string) error {
+	switch v {
+	case "", "http":
+		*protocol = ProtocolHTTP
+	case "binary":
+		*protocol = ProtocolBinary
+	default:
+		return fmt.Errorf("unsupported protocol %s", v)
+	}
+	return nil
+}
+
+func (protocol *TCPProtocol) String() string {
+	switch *protocol {
+	case ProtocolBinary:
+		return "binary"
+	case ProtocolHTTP:
+		return "http"
+	default:
+		return ""
+	}
+}
+
+// RAWInputConfig represents configuration that can be applied on raw input
+type RAWInputConfig struct {
+	capture.PcapOptions
+	Expire         time.Duration      `json:"input-raw-expire"`
+	CopyBufferSize size.Size          `json:"copy-buffer-size"`
+	Engine         capture.EngineType `json:"input-raw-engine"`
+	TrackResponse  bool               `json:"input-raw-track-response"`
+	Protocol       TCPProtocol        `json:"input-raw-protocol"`
+	RealIPHeader   string             `json:"input-raw-realip-header"`
+	Stats          bool               `json:"input-raw-stats"`
+	quit           chan bool          // Channel used only to indicate goroutine should shutdown
+	host           string
+	port           uint16
+}
+
 // RAWInput used for intercepting traffic for given address
 type RAWInput struct {
-	data          chan *raw.TCPMessage
-	address       string
-	expire        time.Duration
-	quit          chan bool // Channel used only to indicate goroutine should shutdown
-	engine        int
-	realIPHeader  []byte
-	trackResponse bool
-	listener      *raw.Listener
-	protocol      raw.TCPProtocol
-	bpfFilter     string
-	timestampType string
-	bufferSize    int64
+	sync.Mutex
+	RAWInputConfig
+	messageStats   []tcp.Stats
+	listener       *capture.Listener
+	message        chan *tcp.Message
+	cancelListener context.CancelFunc
+	closed         bool
 }
 
-// Available engines for intercepting traffic
-const (
-	EngineRawSocket = 1 << iota
-	EnginePcap
-	EnginePcapFile
-)
-
-// NewRAWInput constructor for RAWInput. Accepts address with port as argument.
-func NewRAWInput(address string, engine int, trackResponse bool, expire time.Duration, realIPHeader string, protocol string, bpfFilter string, timestampType string, bufferSize int64) (i *RAWInput) {
+// NewRAWInput constructor for RAWInput. Accepts raw input config as arguments.
+func NewRAWInput(address string, config RAWInputConfig) (i *RAWInput) {
 	i = new(RAWInput)
-	i.data = make(chan *raw.TCPMessage)
-	i.address = address
-	i.expire = expire
-	i.engine = engine
-	i.bpfFilter = bpfFilter
-	i.realIPHeader = []byte(realIPHeader)
+	i.RAWInputConfig = config
+	i.message = make(chan *tcp.Message, 10000)
 	i.quit = make(chan bool)
-	i.trackResponse = trackResponse
-	i.timestampType = timestampType
-	i.bufferSize = bufferSize
-
-	switch protocol {
-	case "http":
-		i.protocol = raw.ProtocolHTTP
-	case "binary":
-		i.protocol = raw.ProtocolBinary
-		if !PRO {
-			log.Fatal("Binary protocols can be used only with PRO license")
-		}
-	default:
-		log.Fatal("Unsupported protocol:", protocol)
+	var host, _port string
+	var err error
+	var port int
+	host, _port, err = net.SplitHostPort(address)
+	if err != nil {
+		log.Fatalf("input-raw: error while parsing address: %s", err)
 	}
+	if _port != "" {
+		port, err = strconv.Atoi(_port)
+	}
+
+	if err != nil {
+		log.Fatalf("parsing port error: %v", err)
+	}
+	i.host = host
+	i.port = uint16(port)
 
 	i.listen(address)
 
 	return
 }
 
-func (i *RAWInput) Read(data []byte) (int, error) {
-	var msg *raw.TCPMessage
+// PluginRead reads meassage from this plugin
+func (i *RAWInput) PluginRead() (*Message, error) {
+	var msgTCP *tcp.Message
+	var msg Message
 	select {
 	case <-i.quit:
-		return 0, ErrorStopped
-	case msg = <-i.data:
+		return nil, ErrorStopped
+	case msgTCP = <-i.message:
+		msg.Data = msgTCP.Data()
 	}
-
-	buf := msg.Bytes()
-
-	var header []byte
-
-	if msg.IsIncoming {
-		header = payloadHeader(RequestPayload, msg.UUID(), msg.Start.UnixNano(), -1)
-		if len(i.realIPHeader) > 0 {
-			buf = proto.SetHeader(buf, i.realIPHeader, []byte(msg.IP().String()))
+	var msgType byte = ResponsePayload
+	if msgTCP.IsRequest {
+		msgType = RequestPayload
+		if i.RealIPHeader != "" {
+			msg.Data = proto.SetHeader(msg.Data, []byte(i.RealIPHeader), []byte(msgTCP.SrcAddr))
 		}
-	} else {
-		header = payloadHeader(ResponsePayload, msg.UUID(), msg.Start.UnixNano(), msg.End.UnixNano()-msg.AssocMessage.End.UnixNano())
 	}
+	msg.Meta = payloadHeader(msgType, msgTCP.UUID(), msgTCP.Start.UnixNano(), msgTCP.End.UnixNano()-msgTCP.Start.UnixNano())
 
-	copy(data[0:len(header)], header)
-	copy(data[len(header):], buf)
-
-	return len(buf) + len(header), nil
+	// to be removed....
+	if msgTCP.Truncated {
+		Debug(2, "[INPUT-RAW] message truncated, increase copy-buffer-size")
+	}
+	// to be removed...
+	if msgTCP.TimedOut {
+		Debug(2, "[INPUT-RAW] message timeout reached, increase input-raw-expire")
+	}
+	if i.Stats {
+		stat := msgTCP.Stats
+		go i.addStats(stat)
+	}
+	msgTCP.Finalize()
+	msgTCP = nil
+	return &msg, nil
 }
 
 func (i *RAWInput) listen(address string) {
-	Debug("Listening for traffic on: " + address)
-
-	host, port, err := net.SplitHostPort(address)
+	var err error
+	i.listener, err = capture.NewListener(i.host, i.port, "", i.Engine, i.TrackResponse, Settings.maxAllowedMem)
 	if err != nil {
-		log.Fatalf("input-raw: error while parsing address: %s", err)
+		log.Fatal(err)
 	}
+	i.listener.SetPcapOptions(i.PcapOptions)
+	err = i.listener.Activate()
+	if err != nil {
+		log.Fatal(err)
+	}
+	parser := tcp.NewMessageParser(i.CopyBufferSize, i.Expire, Debug, i.messageEmitter)
 
-	i.listener = raw.NewListener(host, port, i.engine, i.trackResponse, i.expire, i.protocol, i.bpfFilter, i.timestampType, i.bufferSize, Settings.inputRAWOverrideSnapLen, Settings.inputRAWImmediateMode)
-
-	ch := i.listener.Receiver()
-
+	if i.Protocol == ProtocolHTTP {
+		parser.Start = http1StartHint
+		parser.End = http1EndHint
+	}
+	var ctx context.Context
+	ctx, i.cancelListener = context.WithCancel(context.Background())
+	errCh := i.listener.ListenBackground(ctx, parser.PacketHandler)
+	<-i.listener.Reading
+	Debug(1, i)
 	go func() {
-		for {
-			select {
-			case <-i.quit:
-				return
-			case i.data <- <-ch: // Receiving TCPMessage object
-			}
-		}
+		<-errCh // the listener closed voluntarily
+		i.Close()
 	}()
 }
 
+func (i *RAWInput) messageEmitter(m *tcp.Message) {
+	i.message <- m
+}
+
 func (i *RAWInput) String() string {
-	return "Intercepting traffic from: " + i.address
+	return fmt.Sprintf("Intercepting traffic from: %s:%d", i.host, i.port)
+}
+
+// GetStats returns the stats so far and reset the stats
+func (i *RAWInput) GetStats() []tcp.Stats {
+	i.Lock()
+	defer func() {
+		i.messageStats = []tcp.Stats{}
+		i.Unlock()
+	}()
+	return i.messageStats
 }
 
 // Close closes the input raw listener
 func (i *RAWInput) Close() error {
-	i.listener.Close()
+	i.Lock()
+	defer i.Unlock()
+	if i.closed {
+		return nil
+	}
+	i.cancelListener()
 	close(i.quit)
+	i.closed = true
 	return nil
 }
+
+func (i *RAWInput) addStats(mStats tcp.Stats) {
+	i.Lock()
+	if len(i.messageStats) >= 10000 {
+		i.messageStats = []tcp.Stats{}
+	}
+	i.messageStats = append(i.messageStats, mStats)
+	i.Unlock()
+}
+
+func http1StartHint(pckt *tcp.Packet) (isRequest, isResponse bool) {
+	if proto.HasRequestTitle(pckt.Payload) {
+		return true, false
+	}
+
+	if proto.HasResponseTitle(pckt.Payload) {
+		return false, true
+	}
+
+	// No request or response detected
+	return false, false
+}
+
+func http1EndHint(m *tcp.Message) bool {
+	if m.MissingChunk() {
+		return false
+	}
+
+	return proto.HasFullPayload(m, m.PacketData()...)
+}

input_raw_test.go

@@ -2,23 +2,19 @@ package main
 
 import (
 	"bytes"
-	"io"
 	"io/ioutil"
-	"log"
-	"math/rand"
 	"net"
 	"net/http"
 	"net/http/httptest"
 	"net/http/httputil"
-	"os"
 	"os/exec"
-	"strconv"
 	"strings"
 	"sync"
 	"sync/atomic"
 	"testing"
 	"time"
 
+	"github.com/buger/goreplay/capture"
 	"github.com/buger/goreplay/proto"
 )
 
@@ -26,79 +22,80 @@ const testRawExpire = time.Millisecond * 200
 
 func TestRAWInputIPv4(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
-	listener, err := net.Listen("tcp", ":0")
+	listener, err := net.Listen("tcp4", "127.0.0.1:0")
 	if err != nil {
-		t.Fatal(err)
+		t.Error(err)
+		return
 	}
 	origin := &http.Server{
-		Handler:      http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}),
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Write([]byte("ab"))
+		}),
 		ReadTimeout:  10 * time.Second,
 		WriteTimeout: 10 * time.Second,
 	}
 	go origin.Serve(listener)
 	defer listener.Close()
-
-	originAddr := listener.Addr().String()
+	_, port, _ := net.SplitHostPort(listener.Addr().String())
 
 	var respCounter, reqCounter int64
+	conf := RAWInputConfig{
+		Engine:        capture.EnginePcap,
+		Expire:        0,
+		Protocol:      ProtocolHTTP,
+		TrackResponse: true,
+		RealIPHeader:  "X-Real-IP",
+	}
+	input := NewRAWInput(listener.Addr().String(), conf)
 
-	input := NewRAWInput(originAddr, EnginePcap, true, testRawExpire, "X-Real-IP", "http", "", "", 0)
-	defer input.Close()
-
-	output := NewTestOutput(func(data []byte) {
-		if data[0] == '1' {
-			body := payloadBody(data)
-			if len(proto.Header(body, []byte("X-Real-IP"))) == 0 {
-				t.Error("Should have X-Real-IP header", string(body))
+	output := NewTestOutput(func(msg *Message) {
+		if msg.Meta[0] == '1' {
+			if len(proto.Header(msg.Data, []byte("X-Real-IP"))) == 0 {
+				t.Error("Should have X-Real-IP header")
 			}
-			atomic.AddInt64(&reqCounter, 1)
+			reqCounter++
 		} else {
-			atomic.AddInt64(&respCounter, 1)
+			respCounter++
 		}
-
-		if Settings.debug {
-			log.Println(reqCounter, respCounter)
-		}
-
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	client := NewHTTPClient("http://"+listener.Addr().String(), &HTTPClientConfig{})
-
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
-
-	for i := 0; i < 100; i++ {
-		// request + response
+	addr := "http://127.0.0.1:" + port
+	emitter := NewEmitter()
+	defer emitter.Close()
+	go emitter.Start(plugins, Settings.Middleware)
+	for i := 0; i < 1; i++ {
 		wg.Add(2)
-		client.Get("/")
-		time.Sleep(2 * time.Millisecond)
+		_, err = http.Get(addr)
+		if err != nil {
+			t.Error(err)
+			return
+		}
 	}
-
 	wg.Wait()
-	emitter.Close()
+	const want = 10
+	if reqCounter != respCounter && reqCounter != want {
+		t.Errorf("want %d requests and %d responses, got %d requests and %d responses", want, want, reqCounter, respCounter)
+	}
 }
 
 func TestRAWInputNoKeepAlive(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
-	listener, err := net.Listen("tcp", ":0")
+	listener, err := net.Listen("tcp", "127.0.0.1:0")
 	if err != nil {
 		t.Fatal(err)
 	}
 	origin := &http.Server{
 		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-			w.Write([]byte("a"))
-			w.Write([]byte("b"))
+			w.Write([]byte("ab"))
 		}),
 		ReadTimeout:  10 * time.Second,
 		WriteTimeout: 10 * time.Second,
@@ -106,128 +103,137 @@ func TestRAWInputNoKeepAlive(t *testing.T) {
 	origin.SetKeepAlivesEnabled(false)
 	go origin.Serve(listener)
 	defer listener.Close()
+	_, port, _ := net.SplitHostPort(listener.Addr().String())
 
-	originAddr := listener.Addr().String()
-
-	input := NewRAWInput(originAddr, EnginePcap, true, testRawExpire, "", "http", "", "", 0)
-	defer input.Close()
-
-	output := NewTestOutput(func(data []byte) {
+	conf := RAWInputConfig{
+		Engine:        capture.EnginePcap,
+		Expire:        testRawExpire,
+		Protocol:      ProtocolHTTP,
+		TrackResponse: true,
+	}
+	input := NewRAWInput(":"+port, conf)
+	var respCounter, reqCounter int64
+	output := NewTestOutput(func(msg *Message) {
+		if msg.Meta[0] == '1' {
+			atomic.AddInt64(&reqCounter, 1)
+		} else {
+			atomic.AddInt64(&respCounter, 1)
+		}
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	client := NewHTTPClient("http://"+listener.Addr().String(), &HTTPClientConfig{})
+	addr := "http://127.0.0.1:" + port
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
-	for i := 0; i < 100; i++ {
+	for i := 0; i < 10; i++ {
 		// request + response
 		wg.Add(2)
-		client.Get("/")
-		time.Sleep(2 * time.Millisecond)
+		_, err = http.Get(addr)
+		if err != nil {
+			t.Error(err)
+			return
+		}
 	}
 
 	wg.Wait()
+	const want = 10
+	if reqCounter != respCounter && reqCounter != want {
+		t.Errorf("want %d requests and %d responses, got %d requests and %d responses", want, want, reqCounter, respCounter)
+	}
 	emitter.Close()
 }
 
 func TestRAWInputIPv6(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	listener, err := net.Listen("tcp", "[::1]:0")
 	if err != nil {
-		t.Fatal(err)
+		return
 	}
 	origin := &http.Server{
-		Handler:      http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}),
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Write([]byte("ab"))
+		}),
 		ReadTimeout:  10 * time.Second,
 		WriteTimeout: 10 * time.Second,
 	}
 	go origin.Serve(listener)
 	defer listener.Close()
-
-	originAddr := listener.Addr().String()
+	_, port, _ := net.SplitHostPort(listener.Addr().String())
+	originAddr := "[::1]:" + port
 
 	var respCounter, reqCounter int64
+	conf := RAWInputConfig{
+		Engine:        capture.EnginePcap,
+		Protocol:      ProtocolHTTP,
+		TrackResponse: true,
+	}
+	input := NewRAWInput(originAddr, conf)
 
-	input := NewRAWInput(originAddr, EnginePcap, true, testRawExpire, "", "http", "", "", 0)
-	defer input.Close()
-
-	output := NewTestOutput(func(data []byte) {
-		if data[0] == '1' {
+	output := NewTestOutput(func(msg *Message) {
+		if msg.Meta[0] == '1' {
 			atomic.AddInt64(&reqCounter, 1)
 		} else {
 			atomic.AddInt64(&respCounter, 1)
 		}
-
-		if Settings.debug {
-			log.Println(reqCounter, respCounter)
-		}
-
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
-	plugins.All = append(plugins.All, input, output)
 
-	client := NewHTTPClient("http://"+listener.Addr().String(), &HTTPClientConfig{})
-
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
-
-	for i := 0; i < 100; i++ {
+	emitter := NewEmitter()
+	addr := "http://" + originAddr
+	go emitter.Start(plugins, Settings.Middleware)
+	for i := 0; i < 10; i++ {
 		// request + response
 		wg.Add(2)
-		client.Get("/")
-		time.Sleep(2 * time.Millisecond)
+		_, err = http.Get(addr)
+		if err != nil {
+			t.Error(err)
+			return
+		}
 	}
 
 	wg.Wait()
+	const want = 10
+	if reqCounter != respCounter && reqCounter != want {
+		t.Errorf("want %d requests and %d responses, got %d requests and %d responses", want, want, reqCounter, respCounter)
+	}
 	emitter.Close()
 }
 
-func TestInputRAW100Expect(t *testing.T) {
+func TestInputRAWChunkedEncoding(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
-	fileContent, _ := ioutil.ReadFile("COMM-LICENSE")
+	fileContent, _ := ioutil.ReadFile("README.md")
 
 	// Origing and Replay server initialization
 	origin := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		defer r.Body.Close()
 		ioutil.ReadAll(r.Body)
+
 		wg.Done()
 	}))
-	defer origin.Close()
 
 	originAddr := strings.Replace(origin.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
-
-	input := NewRAWInput(originAddr, EnginePcap, true, time.Second, "", "http", "", "", 0)
-	defer input.Close()
-
-	// We will use it to get content of raw HTTP request
-	testOutput := NewTestOutput(func(data []byte) {
-		switch data[0] {
-		case RequestPayload:
-			if strings.Contains(string(data), "Expect: 100-continue") {
-				t.Error("Should not contain 100-continue header")
-			}
-			wg.Done()
-		case ResponsePayload:
-			wg.Done()
-		}
-	})
+	conf := RAWInputConfig{
+		Engine:        capture.EnginePcap,
+		Expire:        time.Second,
+		Protocol:      ProtocolHTTP,
+		TrackResponse: true,
+	}
+	input := NewRAWInput(originAddr, conf)
 
 	replay := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		defer r.Body.Close()
@@ -245,212 +251,100 @@ func TestInputRAW100Expect(t *testing.T) {
 	httpOutput := NewHTTPOutput(replay.URL, &HTTPOutputConfig{})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{testOutput, httpOutput},
-	}
-	plugins.All = append(plugins.All, input, testOutput, httpOutput)
-
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
-
-	// Origin + Response/Request Test Output + Request Http Output
-	wg.Add(4)
-	curl := exec.Command("curl", "http://"+originAddr, "--data-binary", "@COMM-LICENSE")
-	err := curl.Run()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	wg.Wait()
-	emitter.Close()
-}
-
-func TestInputRAWChunkedEncoding(t *testing.T) {
-	wg := new(sync.WaitGroup)
-	quit := make(chan int)
-
-	fileContent, _ := ioutil.ReadFile("README.md")
-
-	// Origing and Replay server initialization
-	origin := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		defer r.Body.Close()
-		ioutil.ReadAll(r.Body)
-
-		wg.Done()
-	}))
-
-	originAddr := strings.Replace(origin.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
-	input := NewRAWInput(originAddr, EnginePcap, true, time.Second, "", "http", "", "", 0)
-	defer input.Close()
-
-	replay := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		defer r.Body.Close()
-		body, _ := ioutil.ReadAll(r.Body)
-
-		if !bytes.Equal(body, fileContent) {
-			buf, _ := httputil.DumpRequest(r, true)
-			t.Error("Wrong POST body:", string(buf))
-		}
-
-		wg.Done()
-	}))
-	defer replay.Close()
-
-	httpOutput := NewHTTPOutput(replay.URL, &HTTPOutputConfig{Debug: true})
-
-	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{httpOutput},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{httpOutput},
 	}
 	plugins.All = append(plugins.All, input, httpOutput)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	defer emitter.Close()
+	go emitter.Start(plugins, Settings.Middleware)
 	wg.Add(2)
 
 	curl := exec.Command("curl", "http://"+originAddr, "--header", "Transfer-Encoding: chunked", "--header", "Expect:", "--data-binary", "@README.md")
 	err := curl.Run()
 	if err != nil {
-		log.Fatal(err)
-	}
-
-	wg.Wait()
-	emitter.Close()
-}
-
-func TestInputRAWLargePayload(t *testing.T) {
-	// FIXME: Large payloads does not work for travis for some reason...
-	if os.Getenv("TRAVIS_BUILD_DIR") != "" {
+		t.Error(err)
 		return
 	}
-	wg := new(sync.WaitGroup)
-	quit := make(chan int)
-	sizeB := 100 * 1000
 
-	// Generate 100kb file
-	dd := exec.Command("dd", "if=/dev/urandom", "of=/tmp/large", "bs=1", "count="+strconv.Itoa(sizeB))
-	err := dd.Run()
+	wg.Wait()
+}
+
+func BenchmarkRAWInputWithReplay(b *testing.B) {
+	var respCounter, reqCounter, replayCounter uint32
+	wg := &sync.WaitGroup{}
+
+	listener, err := net.Listen("tcp4", "127.0.0.1:0")
 	if err != nil {
-		log.Fatal("dd error:", err)
+		b.Error(err)
+		return
+	}
+	listener0, err := net.Listen("tcp4", "127.0.0.1:0")
+	if err != nil {
+		b.Error(err)
+		return
 	}
 
-	origin := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		defer req.Body.Close()
-		body, _ := ioutil.ReadAll(req.Body)
+	origin := http.Server{
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.Write([]byte("ab"))
+		}),
+	}
+	go origin.Serve(listener)
+	defer origin.Close()
+	originAddr := listener.Addr().String()
 
-		if len(body) != sizeB {
-			t.Error("File size should be 1mb:", len(body))
-		}
-
-		wg.Done()
-	}))
-	originAddr := strings.Replace(origin.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
-
-	input := NewRAWInput(originAddr, EnginePcap, true, testRawExpire, "", "http", "", "", 0)
-	defer input.Close()
-
-	replay := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		body, _ := ioutil.ReadAll(req.Body)
-		// // req.Body = http.MaxBytesReader(w, req.Body, 1*1024*1024)
-		// // buf := make([]byte, 1*1024*1024)
-		// n, _ := req.Body.Read(buf)
-		// body := buf[0:n]
-
-		if len(body) != sizeB {
-			t.Errorf("File size should be %d bytes: %d", sizeB, len(body))
-		}
-
-		wg.Done()
-	}))
+	replay := http.Server{
+		Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			atomic.AddUint32(&replayCounter, 1)
+			w.Write(nil)
+			wg.Done()
+		}),
+	}
+	go replay.Serve(listener0)
 	defer replay.Close()
+	replayAddr := listener0.Addr().String()
 
-	httpOutput := NewHTTPOutput(replay.URL, &HTTPOutputConfig{Debug: false})
+	conf := RAWInputConfig{
+		Engine:        capture.EnginePcap,
+		Expire:        testRawExpire,
+		Protocol:      ProtocolHTTP,
+		TrackResponse: true,
+	}
+	input := NewRAWInput(originAddr, conf)
+
+	testOutput := NewTestOutput(func(msg *Message) {
+		if msg.Meta[0] == '1' {
+			reqCounter++
+		} else {
+			respCounter++
+		}
+		wg.Done()
+	})
+	httpOutput := NewHTTPOutput("http://"+replayAddr, &HTTPOutputConfig{})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{httpOutput},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{testOutput, httpOutput},
 	}
-	plugins.All = append(plugins.All, input, httpOutput)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
-
-	wg.Add(2)
-	curl := exec.Command("curl", "http://"+originAddr, "--header", "Transfer-Encoding: chunked", "--header", "Expect:", "--data-binary", "@/tmp/large")
-	err = curl.Run()
-	if err != nil {
-		log.Fatal("curl error:", err)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
+	addr := "http://" + originAddr
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		wg.Add(3) // reqCounter + replayCounter + respCounter
+		resp, err := http.Get(addr)
+		if err != nil {
+			wg.Add(-3)
+		}
+		resp.Body.Close()
 	}
 
 	wg.Wait()
-	emitter.Close()
-}
-
-func BenchmarkRAWInput(b *testing.B) {
-	var respCounter, reqCounter, replayCounter int64
-
-	quit := make(chan int)
-
-	origin := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}))
-	defer origin.Close()
-	originAddr := strings.Replace(origin.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
-
-	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		atomic.AddInt64(&replayCounter, 1)
-	}))
-	defer origin.Close()
-	upstreamAddr := strings.Replace(upstream.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
-
-	input := NewRAWInput(originAddr, EnginePcap, true, testRawExpire, "", "http", "", "", 0)
-	defer input.Close()
-
-	output := NewTestOutput(func(data []byte) {
-		if data[0] == '1' {
-			atomic.AddInt64(&reqCounter, 1)
-		} else {
-			atomic.AddInt64(&respCounter, 1)
-		}
-	})
-
-	httpOutput := NewLimiter(NewHTTPOutput(upstreamAddr, &HTTPOutputConfig{}), "10%")
-
-	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output, httpOutput},
-	}
-	plugins.All = append(plugins.All, input, output, httpOutput)
-
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
-
-	emitted := 0
-	fileContent, _ := ioutil.ReadFile("LICENSE.txt")
-
-	time.Sleep(400 * time.Millisecond)
-
-	for i := 0; i < b.N; i++ {
-		wg := new(sync.WaitGroup)
-		wg.Add(100 * 1000)
-		emitted += 100 * 1000
-		for w := 0; w < 100; w++ {
-			go func() {
-				client := NewHTTPClient(origin.URL, &HTTPClientConfig{})
-				for i := 0; i < 1000; i++ {
-					if i%2 == 0 {
-						client.Post("/", fileContent)
-					} else {
-						client.Get("/")
-					}
-					time.Sleep(time.Duration(rand.Int63n(50)) * time.Millisecond)
-					wg.Done()
-				}
-			}()
-		}
-		wg.Wait()
-	}
-
-	time.Sleep(400 * time.Millisecond)
-	log.Println("Emitted ", emitted, ", Captured ", reqCounter, "requests and ", respCounter, " responses", "and replayed", replayCounter)
-
+	b.ReportMetric(float64(reqCounter), "requests")
+	b.ReportMetric(float64(respCounter), "responses")
+	b.ReportMetric(float64(replayCounter), "replayed")
 	emitter.Close()
 }

input_tcp.go

@@ -8,28 +8,28 @@ import (
 	"io"
 	"log"
 	"net"
-	"os"
 )
 
 // TCPInput used for internal communication
 type TCPInput struct {
-	data     chan []byte
+	data     chan *Message
 	listener net.Listener
 	address  string
 	config   *TCPInputConfig
 	stop     chan bool // Channel used only to indicate goroutine should shutdown
 }
 
+// TCPInputConfig represents configuration of a TCP input plugin
 type TCPInputConfig struct {
-	secure          bool
-	certificatePath string
-	keyPath         string
+	Secure          bool   `json:"input-tcp-secure"`
+	CertificatePath string `json:"input-tcp-certificate"`
+	KeyPath         string `json:"input-tcp-certificate-key"`
 }
 
 // NewTCPInput constructor for TCPInput, accepts address with port
 func NewTCPInput(address string, config *TCPInputConfig) (i *TCPInput) {
 	i = new(TCPInput)
-	i.data = make(chan []byte, 1000)
+	i.data = make(chan *Message, 1000)
 	i.address = address
 	i.config = config
 	i.stop = make(chan bool)
@@ -39,85 +39,89 @@ func NewTCPInput(address string, config *TCPInputConfig) (i *TCPInput) {
 	return
 }
 
-func (i *TCPInput) Read(data []byte) (int, error) {
-	var buf []byte
+// PluginRead returns data and details read from plugin
+func (i *TCPInput) PluginRead() (msg *Message, err error) {
 	select {
 	case <-i.stop:
-		return 0, ErrorStopped
-	case buf = <-i.data:
+		return nil, ErrorStopped
+	case msg = <-i.data:
+		return msg, nil
 	}
-	copy(data, buf)
 
-	return len(buf), nil
 }
 
+// Close closes the plugin
 func (i *TCPInput) Close() error {
 	close(i.stop)
+	i.listener.Close()
 	return nil
 }
 
 func (i *TCPInput) listen(address string) {
-	if i.config.secure {
-		cer, err := tls.LoadX509KeyPair(i.config.certificatePath, i.config.keyPath)
+	if i.config.Secure {
+		cer, err := tls.LoadX509KeyPair(i.config.CertificatePath, i.config.KeyPath)
 		if err != nil {
-			log.Fatal("Error while loading --input-file certificate:", err)
+			log.Fatalln("error while loading --input-tcp TLS certificate:", err)
 		}
 
 		config := &tls.Config{Certificates: []tls.Certificate{cer}}
 		listener, err := tls.Listen("tcp", address, config)
 		if err != nil {
-			log.Fatal("Can't start --input-tcp with secure connection:", err)
+			log.Fatalln("[INPUT-TCP] failed to start INPUT-TCP listener:", err)
 		}
 		i.listener = listener
 	} else {
 		listener, err := net.Listen("tcp", address)
 		if err != nil {
-			log.Fatal("Can't start:", err)
+			log.Fatalln("failed to start INPUT-TCP listener:", err)
 		}
-
 		i.listener = listener
 	}
-
 	go func() {
 		for {
 			conn, err := i.listener.Accept()
-
-			if err != nil {
-				log.Println("Error while Accept()", err)
+			if err == nil {
+				go i.handleConnection(conn)
 				continue
 			}
-
-			go i.handleConnection(conn)
+			if isTemporaryNetworkError(err) {
+				continue
+			}
+			if operr, ok := err.(*net.OpError); ok && operr.Err.Error() != "use of closed network connection" {
+				Debug(0, fmt.Sprintf("[INPUT-TCP] listener closed, err: %q", err))
+			}
+			break
 		}
 	}()
 }
 
+var payloadSeparatorAsBytes = []byte(payloadSeparator)
+
 func (i *TCPInput) handleConnection(conn net.Conn) {
 	defer conn.Close()
 
-	payloadSeparatorAsBytes := []byte(payloadSeparator)
 	reader := bufio.NewReader(conn)
 	var buffer bytes.Buffer
 
 	for {
 		line, err := reader.ReadBytes('\n')
-
 		if err != nil {
+			if isTemporaryNetworkError(err) {
+				continue
+			}
 			if err != io.EOF {
-				fmt.Fprintln(os.Stderr, "Unexpected error in input tcp connection:", err)
+				Debug(0, fmt.Sprintf("[INPUT-TCP] connection error: %q", err))
 			}
 			break
-
 		}
 
 		if bytes.Equal(payloadSeparatorAsBytes[1:], line) {
-			asBytes := buffer.Bytes()
+			// unread the '\n' before monkeys
+			buffer.UnreadByte()
+			var msg Message
+			msg.Meta, msg.Data = payloadMetaWithBody(buffer.Bytes())
+			i.data <- &msg
 			buffer.Reset()
-
-			newBuf := make([]byte, len(asBytes)-1)
-			copy(newBuf, asBytes)
-
-			i.data <- newBuf
 		} else {
 			buffer.Write(line)
 		}
@@ -127,3 +131,13 @@ func (i *TCPInput) handleConnection(conn net.Conn) {
 func (i *TCPInput) String() string {
 	return "TCP input: " + i.address
 }
+
+func isTemporaryNetworkError(err error) bool {
+	if nerr, ok := err.(net.Error); ok && nerr.Temporary() {
+		return true
+	}
+	if operr, ok := err.(*net.OpError); ok && operr.Temporary() {
+		return true
+	}
+	return false
+}

input_tcp_test.go

@@ -7,7 +7,6 @@ import (
 	"crypto/tls"
 	"crypto/x509"
 	"encoding/pem"
-	"io"
 	"io/ioutil"
 	"log"
 	"math/big"
@@ -20,21 +19,20 @@ import (
 
 func TestTCPInput(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTCPInput("127.0.0.1:0", &TCPInputConfig{})
-	output := NewTestOutput(func(data []byte) {
+	output := NewTestOutput(func(*Message) {
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	tcpAddr, err := net.ResolveTCPAddr("tcp", input.listener.Addr().String())
 
@@ -43,7 +41,6 @@ func TestTCPInput(t *testing.T) {
 	}
 
 	conn, err := net.DialTCP("tcp", nil, tcpAddr)
-
 	if err != nil {
 		log.Fatal(err)
 	}
@@ -52,10 +49,14 @@ func TestTCPInput(t *testing.T) {
 
 	for i := 0; i < 100; i++ {
 		wg.Add(1)
-		conn.Write(msg)
-		conn.Write([]byte(payloadSeparator))
+		if _, err = conn.Write(msg); err == nil {
+			_, err = conn.Write(payloadSeparatorAsBytes)
+		}
+		if err != nil {
+			t.Error(err)
+			return
+		}
 	}
-
 	wg.Wait()
 	emitter.Close()
 }
@@ -99,25 +100,24 @@ func TestTCPInputSecure(t *testing.T) {
 	}()
 
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTCPInput("127.0.0.1:0", &TCPInputConfig{
-		secure:          true,
-		certificatePath: serverCertPemFile.Name(),
-		keyPath:         serverPrivPemFile.Name(),
+		Secure:          true,
+		CertificatePath: serverCertPemFile.Name(),
+		KeyPath:         serverPrivPemFile.Name(),
 	})
-	output := NewTestOutput(func(data []byte) {
+	output := NewTestOutput(func(*Message) {
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	conf := &tls.Config{
 		InsecureSkipVerify: true,

kafka.go

@@ -2,20 +2,41 @@ package main
 
 import (
 	"bytes"
+	"crypto/tls"
+	"crypto/x509"
+	"errors"
 	"fmt"
+	"io/ioutil"
+	"log"
 
 	"github.com/Shopify/sarama"
 	"github.com/buger/goreplay/proto"
 )
 
-// KafkaConfig should contains required information to
+// InputKafkaConfig should contains required information to
 // build producers.
-type KafkaConfig struct {
-	host     string
-	topic    string
+type InputKafkaConfig struct {
 	producer sarama.AsyncProducer
 	consumer sarama.Consumer
-	useJSON  bool
+	Host     string `json:"input-kafka-host"`
+	Topic    string `json:"input-kafka-topic"`
+	UseJSON  bool   `json:"input-kafka-json-format"`
+}
+
+// OutputKafkaConfig is the representation of kfka output configuration
+type OutputKafkaConfig struct {
+	producer sarama.AsyncProducer
+	consumer sarama.Consumer
+	Host     string `json:"output-kafka-host"`
+	Topic    string `json:"output-kafka-topic"`
+	UseJSON  bool   `json:"output-kafka-json-format"`
+}
+
+// KafkaTLSConfig should contains TLS certificates for connecting to secured Kafka clusters
+type KafkaTLSConfig struct {
+	CACert     string `json:"kafka-tls-ca-cert"`
+	ClientCert string `json:"kafka-tls-client-cert"`
+	ClientKey  string `json:"kafka-tls-client-key"`
 }
 
 // KafkaMessage should contains catched request information that should be
@@ -30,6 +51,53 @@ type KafkaMessage struct {
 	ReqHeaders map[string]string `json:"Req_Headers,omitempty"`
 }
 
+
+// NewTLSConfig loads TLS certificates
+func NewTLSConfig(clientCertFile, clientKeyFile, caCertFile string) (*tls.Config, error) {
+	tlsConfig := tls.Config{}
+
+	if clientCertFile != "" && clientKeyFile == "" {
+		return &tlsConfig, errors.New("Missing key of client certificate in kafka")
+	}
+	if clientCertFile == "" && clientKeyFile != "" {
+		return &tlsConfig, errors.New("missing TLS client certificate in kafka")
+	}
+	// Load client cert
+	if  (clientCertFile != "") && (clientKeyFile != "") {
+		cert, err := tls.LoadX509KeyPair(clientCertFile, clientKeyFile)
+		if err != nil {
+			return &tlsConfig, err
+		}
+		tlsConfig.Certificates = []tls.Certificate{cert}
+	}
+	// Load CA cert
+	if caCertFile != "" {
+		caCert, err := ioutil.ReadFile(caCertFile)
+		if err != nil {
+			return &tlsConfig, err
+		}
+		caCertPool := x509.NewCertPool()
+		caCertPool.AppendCertsFromPEM(caCert)
+		tlsConfig.RootCAs = caCertPool
+	}
+	return &tlsConfig, nil
+}
+
+// NewKafkaConfig returns Kafka config with or without TLS
+func NewKafkaConfig(tlsConfig *KafkaTLSConfig) *sarama.Config {
+	config := sarama.NewConfig()
+	// Configuration options go here
+	if tlsConfig != nil && (tlsConfig.ClientCert != "" || tlsConfig.CACert != "") {
+		config.Net.TLS.Enable = true
+		tlsConfig, err := NewTLSConfig(tlsConfig.ClientCert, tlsConfig.ClientKey, tlsConfig.CACert)
+		if err != nil {
+			log.Fatal(err)
+		}
+		config.Net.TLS.Config = tlsConfig
+	}
+	return config
+}
+
 // Dump returns the given request in its HTTP/1.x wire
 // representation.
 func (m KafkaMessage) Dump() ([]byte, error) {
@@ -37,13 +105,13 @@ func (m KafkaMessage) Dump() ([]byte, error) {
 
 	b.WriteString(fmt.Sprintf("%s %s %s\n", m.ReqType, m.ReqID, m.ReqTs))
 	b.WriteString(fmt.Sprintf("%s %s HTTP/1.1", m.ReqMethod, m.ReqURL))
-	b.Write(proto.CLRF)
+	b.Write(proto.CRLF)
 	for key, value := range m.ReqHeaders {
 		b.WriteString(fmt.Sprintf("%s: %s", key, value))
-		b.Write(proto.CLRF)
+		b.Write(proto.CRLF)
 	}
 
-	b.Write(proto.CLRF)
+	b.Write(proto.CRLF)
 	b.WriteString(m.ReqBody)
 
 	return b.Bytes(), nil

limiter.go

@@ -20,8 +20,8 @@ type Limiter struct {
 }
 
 func parseLimitOptions(options string) (limit int, isPercent bool) {
-	if strings.Contains(options, "%") {
-		limit, _ = strconv.Atoi(strings.Split(options, "%")[0])
+	if n := strings.Index(options, "%"); n > 0 {
+		limit, _ = strconv.Atoi(options[:n])
 		isPercent = true
 	} else {
 		limit, _ = strconv.Atoi(options)
@@ -33,7 +33,7 @@ func parseLimitOptions(options string) (limit int, isPercent bool) {
 
 // NewLimiter constructor for Limiter, accepts plugin and options
 // `options` allow to sprcify relatve or absolute limiting
-func NewLimiter(plugin interface{}, options string) io.ReadWriter {
+func NewLimiter(plugin interface{}, options string) PluginReadWriter {
 	l := new(Limiter)
 	l.limit, l.isPercent = parseLimitOptions(options)
 	l.plugin = plugin
@@ -71,24 +71,29 @@ func (l *Limiter) isLimited() bool {
 	return false
 }
 
-func (l *Limiter) Write(data []byte) (n int, err error) {
+// PluginWrite writes message to this plugin
+func (l *Limiter) PluginWrite(msg *Message) (n int, err error) {
 	if l.isLimited() {
 		return 0, nil
 	}
-
-	n, err = l.plugin.(io.Writer).Write(data)
-	return
+	if w, ok := l.plugin.(PluginWriter); ok {
+		return w.PluginWrite(msg)
+	}
+	// avoid further writing
+	return 0, io.ErrClosedPipe
 }
 
-func (l *Limiter) Read(data []byte) (n int, err error) {
-	if r, ok := l.plugin.(io.Reader); ok {
-		n, err = r.Read(data)
+// PluginRead reads message from this plugin
+func (l *Limiter) PluginRead() (msg *Message, err error) {
+	if r, ok := l.plugin.(PluginReader); ok {
+		msg, err = r.PluginRead()
 	} else {
-		return 0, nil
+		// avoid further reading
+		return nil, io.ErrClosedPipe
 	}
 
 	if l.isLimited() {
-		return 0, nil
+		return nil, nil
 	}
 
 	return
@@ -100,7 +105,7 @@ func (l *Limiter) String() string {
 
 // Close closes the resources.
 func (l *Limiter) Close() error {
-	if fi, ok := l.plugin.(io.ReadCloser); ok {
+	if fi, ok := l.plugin.(io.Closer); ok {
 		fi.Close()
 	}
 	return nil

limiter_test.go

@@ -3,29 +3,27 @@
 package main
 
 import (
-	"io"
 	"sync"
 	"testing"
 )
 
 func TestOutputLimiter(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
-	output := NewLimiter(NewTestOutput(func(data []byte) {
+	output := NewLimiter(NewTestOutput(func(*Message) {
 		wg.Done()
 	}), "10")
 	wg.Add(10)
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	for i := 0; i < 100; i++ {
 		input.EmitGET()
@@ -37,22 +35,21 @@ func TestOutputLimiter(t *testing.T) {
 
 func TestInputLimiter(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewLimiter(NewTestInput(), "10")
-	output := NewTestOutput(func(data []byte) {
+	output := NewTestOutput(func(*Message) {
 		wg.Done()
 	})
 	wg.Add(10)
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	for i := 0; i < 100; i++ {
 		input.(*Limiter).plugin.(*TestInput).EmitGET()
@@ -65,54 +62,50 @@ func TestInputLimiter(t *testing.T) {
 // Should limit all requests
 func TestPercentLimiter1(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
-	output := NewLimiter(NewTestOutput(func(data []byte) {
+	output := NewLimiter(NewTestOutput(func(*Message) {
 		wg.Done()
 	}), "0%")
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	for i := 0; i < 100; i++ {
 		input.EmitGET()
 	}
 
 	wg.Wait()
-	emitter.Close()
 }
 
 // Should not limit at all
 func TestPercentLimiter2(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
-	output := NewLimiter(NewTestOutput(func(data []byte) {
+	output := NewLimiter(NewTestOutput(func(*Message) {
 		wg.Done()
 	}), "100%")
 	wg.Add(100)
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	for i := 0; i < 100; i++ {
 		input.EmitGET()
 	}
 
 	wg.Wait()
-	emitter.Close()
 }

middleware.go

@@ -2,37 +2,40 @@ package main
 
 import (
 	"bufio"
+	"context"
 	"encoding/hex"
 	"fmt"
 	"io"
-	"log"
 	"os"
 	"os/exec"
 	"strings"
 	"sync"
+	"syscall"
 )
 
+// Middleware represents a middleware object
 type Middleware struct {
-	command string
-
-	data chan []byte
-
-	mu sync.Mutex
-
-	Stdin  io.Writer
-	Stdout io.Reader
-
-	stop chan bool // Channel used only to indicate goroutine should shutdown
+	command       string
+	data          chan *Message
+	Stdin         io.Writer
+	Stdout        io.Reader
+	commandCancel context.CancelFunc
+	stop          chan bool // Channel used only to indicate goroutine should shutdown
+	closed        bool
+	mu            sync.RWMutex
 }
 
+// NewMiddleware returns new middleware
 func NewMiddleware(command string) *Middleware {
 	m := new(Middleware)
 	m.command = command
-	m.data = make(chan []byte, 1000)
+	m.data = make(chan *Message, 1000)
 	m.stop = make(chan bool)
 
 	commands := strings.Split(command, " ")
-	cmd := exec.Command(commands[0], commands[1:]...)
+	ctx, cancl := context.WithCancel(context.Background())
+	m.commandCancel = cancl
+	cmd := exec.CommandContext(ctx, commands[0], commands[1:]...)
 
 	m.Stdout, _ = cmd.StdoutPipe()
 	m.Stdin, _ = cmd.StdinPipe()
@@ -42,62 +45,61 @@ func NewMiddleware(command string) *Middleware {
 	go m.read(m.Stdout)
 
 	go func() {
-		err := cmd.Start()
-
-		if err != nil {
-			log.Fatal(err)
+		defer m.Close()
+		var err error
+		if err = cmd.Start(); err == nil {
+			err = cmd.Wait()
 		}
-
-		err = cmd.Wait()
-
 		if err != nil {
-			log.Fatal(err)
+			if e, ok := err.(*exec.ExitError); ok {
+				status := e.Sys().(syscall.WaitStatus)
+				if status.Signal() == syscall.SIGKILL /*killed or context canceld */ {
+					return
+				}
+			}
+			Debug(0, fmt.Sprintf("[MIDDLEWARE] command[%q] error: %q", command, err.Error()))
 		}
 	}()
 
 	return m
 }
 
-func (m *Middleware) ReadFrom(plugin io.Reader) {
-	Debug("[MIDDLEWARE-MASTER] Starting reading from", plugin)
+// ReadFrom start a worker to read from this plugin
+func (m *Middleware) ReadFrom(plugin PluginReader) {
+	Debug(2, fmt.Sprintf("[MIDDLEWARE] command[%q] Starting reading from %q", m.command, plugin))
 	go m.copy(m.Stdin, plugin)
 }
 
-func (m *Middleware) copy(to io.Writer, from io.Reader) {
-	buf := make([]byte, 5*1024*1024)
-	dst := make([]byte, len(buf)*4)
+func (m *Middleware) copy(to io.Writer, from PluginReader) {
+	var buf, dst []byte
 
 	for {
-		nr, _ := from.Read(buf)
-		if nr == 0 || nr > len(buf) {
+		msg, err := from.PluginRead()
+		if err != nil {
+			return
+		}
+		if msg == nil || len(msg.Data) == 0 {
 			continue
 		}
-
-		payload := buf[0:nr]
-
-		if Settings.prettifyHTTP {
-			payload = prettifyHTTP(payload)
-			nr = len(payload)
-
-			if nr*2 > len(dst) {
-				continue
-			}
+		buf = msg.Data
+		if Settings.PrettifyHTTP {
+			buf = prettifyHTTP(msg.Data)
 		}
-
-		if Settings.prettifyHTTP {
-			payload = prettifyHTTP(payload)
-			nr = len(payload)
+		dstLen := (len(buf)+len(msg.Meta))*2 + 1
+		// if enough space was previously allocated use it instead
+		if dstLen > len(dst) {
+			dst = make([]byte, dstLen)
 		}
+		n := hex.Encode(dst, msg.Meta)
+		n += hex.Encode(dst[n:], buf)
+		dst[n] = '\n'
 
-		hex.Encode(dst, payload)
-		dst[nr*2] = '\n'
-
-		m.mu.Lock()
-		to.Write(dst[0 : nr*2+1])
-		m.mu.Unlock()
-
-		if Settings.debug {
-			Debug("[MIDDLEWARE-MASTER] Sending:", string(buf[0:nr]), "From:", from)
+		n, err = to.Write(dst[:n+1])
+		if err == nil {
+			continue
+		}
+		if m.isClosed() {
+			return
 		}
 	}
 }
@@ -106,52 +108,59 @@ func (m *Middleware) read(from io.Reader) {
 	reader := bufio.NewReader(from)
 	var line []byte
 	var e error
-
 	for {
 		if line, e = reader.ReadBytes('\n'); e != nil {
-			if e == io.EOF {
-				continue
-			} else {
-				break
+			if m.isClosed() {
+				return
 			}
+			continue
 		}
-
-		buf := make([]byte, len(line)/2)
+		buf := make([]byte, (len(line)-1)/2)
 		if _, err := hex.Decode(buf, line[:len(line)-1]); err != nil {
-			fmt.Fprintln(os.Stderr, "Failed to decode input payload", err, len(line), string(line[:len(line)-1]))
+			Debug(0, fmt.Sprintf("[MIDDLEWARE] command[%q] failed to decode err: %q", m.command, err))
+			continue
 		}
-
-		if Settings.debug {
-			Debug("[MIDDLEWARE-MASTER] Received:", string(buf))
-		}
-
+		var msg Message
+		msg.Meta, msg.Data = payloadMetaWithBody(buf)
 		select {
 		case <-m.stop:
 			return
-		case m.data <- buf:
+		case m.data <- &msg:
 		}
 	}
 
+}
+
+// PluginRead reads message from this plugin
+func (m *Middleware) PluginRead() (msg *Message, err error) {
+	select {
+	case <-m.stop:
+		return nil, ErrorStopped
+	case msg = <-m.data:
+	}
+
 	return
 }
 
-func (m *Middleware) Read(data []byte) (int, error) {
-	var buf []byte
-	select {
-	case <-m.stop:
-		return 0, ErrorStopped
-	case buf = <-m.data:
-	}
-
-	copy(data, buf)
-	return len(buf), nil
-}
-
 func (m *Middleware) String() string {
-	return fmt.Sprintf("Modifying traffic using '%s' command", m.command)
+	return fmt.Sprintf("Modifying traffic using %q command", m.command)
 }
 
+func (m *Middleware) isClosed() bool {
+	m.mu.RLock()
+	defer m.mu.RUnlock()
+	return m.closed
+}
+
+// Close closes this plugin
 func (m *Middleware) Close() error {
+	if m.isClosed() {
+		return nil
+	}
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	m.commandCancel()
 	close(m.stop)
+	m.closed = true
 	return nil
 }

middleware_test.go

@@ -2,228 +2,153 @@ package main
 
 import (
 	"bytes"
-	"crypto/rand"
-	"encoding/hex"
-	"io"
-	"net/http"
-	"net/http/httptest"
+	"context"
+	"os"
+	"os/exec"
 	"strings"
-	"sync"
+	"sync/atomic"
+	"syscall"
 	"testing"
-	"time"
 
 	"github.com/buger/goreplay/proto"
 )
 
-type fakeServiceCb func(string, int, []byte)
+const echoSh = "./examples/middleware/echo.sh"
+const tokenModifier = "go run ./examples/middleware/token_modifier.go"
 
-// Simple service that generate token on request, and require this token for accesing to secure area
-func NewFakeSecureService(wg *sync.WaitGroup, cb fakeServiceCb) *httptest.Server {
-	active_tokens := make([]string, 0)
-	var mu sync.Mutex
+var noDebug = append(syscall.Environ(), "GOR_TEST=1")
 
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		mu.Lock()
-		defer mu.Unlock()
-		Debug("Received request: " + req.URL.String())
+func initMiddleware(cmd *exec.Cmd, cancl context.CancelFunc, l PluginReader, c func(error)) *Middleware {
+	var m Middleware
+	m.data = make(chan *Message, 1000)
+	m.stop = make(chan bool)
+	m.commandCancel = cancl
+	m.Stdout, _ = cmd.StdoutPipe()
+	m.Stdin, _ = cmd.StdinPipe()
+	cmd.Stderr = os.Stderr
+	go m.read(m.Stdout)
+	go func() {
+		defer m.Close()
+		var err error
+		if err = cmd.Start(); err == nil {
+			err = cmd.Wait()
+		}
+		if err != nil {
+			c(err)
+		}
+	}()
+	m.ReadFrom(l)
+	return &m
+}
 
-		switch req.URL.Path {
-		case "/token":
-			// Generate random token
-			token_length := 10
-			buf := make([]byte, token_length)
-			rand.Read(buf)
-			token := hex.EncodeToString(buf)
-			active_tokens = append(active_tokens, token)
+func initCmd(command string, env []string) (*exec.Cmd, context.CancelFunc) {
+	commands := strings.Split(command, " ")
+	ctx, cancl := context.WithCancel(context.Background())
+	cmd := exec.CommandContext(ctx, commands[0], commands[1:]...)
+	cmd.Env = env
+	return cmd, cancl
+}
 
-			w.Write([]byte(token))
-
-			cb(req.URL.Path, 200, []byte(token))
-		case "/secure":
-			token := req.URL.Query().Get("token")
-			token_found := false
-
-			for _, t := range active_tokens {
-				if t == token {
-					token_found = true
-					break
+func TestMiddlewareEarlyClose(t *testing.T) {
+	quit := make(chan struct{})
+	in := NewTestInput()
+	cmd, cancl := initCmd(echoSh, noDebug)
+	midd := initMiddleware(cmd, cancl, in, func(err error) {
+		if err != nil {
+			if e, ok := err.(*exec.ExitError); ok {
+				status := e.Sys().(syscall.WaitStatus)
+				if status.Signal() != syscall.SIGKILL {
+					t.Errorf("expected error to be signal killed. got %s", status.Signal().String())
 				}
 			}
-
-			if token_found {
-				w.WriteHeader(http.StatusAccepted)
-				cb(req.URL.Path, 202, []byte(nil))
-			} else {
-				w.WriteHeader(http.StatusForbidden)
-				cb(req.URL.Path, 403, []byte(nil))
-			}
 		}
-
-		wg.Done()
-	}))
-
-	return server
-}
-
-func TestFakeSecureService(t *testing.T) {
-	var resp, token []byte
-
-	wg := new(sync.WaitGroup)
-
-	server := NewFakeSecureService(wg, func(path string, status int, resp []byte) {
+		quit <- struct{}{}
 	})
-	defer server.Close()
-
-	wg.Add(3)
-
-	client := NewHTTPClient(server.URL, &HTTPClientConfig{Debug: true})
-	resp, _ = client.Get("/token")
-	token = proto.Body(resp)
-
-	// Right token
-	resp, _ = client.Get("/secure?token=" + string(token))
-	if !bytes.Equal(proto.Status(resp), []byte("202")) {
-		t.Error("Valid token should return status 202:", string(proto.Status(resp)))
+	var body = []byte("OPTIONS / HTTP/1.1\r\nHost: example.org\r\n\r\n")
+	count := uint32(0)
+	out := NewTestOutput(func(msg *Message) {
+		if !bytes.Equal(body, msg.Data) {
+			t.Errorf("expected %q to equal %q", body, msg.Data)
+		}
+		atomic.AddUint32(&count, 1)
+		if atomic.LoadUint32(&count) == 5 {
+			quit <- struct{}{}
+		}
+	})
+	pl := &InOutPlugins{}
+	pl.Inputs = []PluginReader{midd, in}
+	pl.Outputs = []PluginWriter{out}
+	pl.All = []interface{}{midd, out, in}
+	e := NewEmitter()
+	go e.Start(pl, "")
+	for i := 0; i < 5; i++ {
+		in.EmitBytes(body)
 	}
-
-	// Wrong tokens forbidden
-	resp, _ = client.Get("/secure?token=wrong")
-	if !bytes.Equal(proto.Status(resp), []byte("403")) {
-		t.Error("Wrong token should returns status 403:", string(proto.Status(resp)))
-	}
-
-	wg.Wait()
-}
-
-func TestEchoMiddleware(t *testing.T) {
-	wg := new(sync.WaitGroup)
-
-	from := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Env", "prod")
-		w.Header().Set("RequestPath", r.URL.Path)
-		wg.Done()
-	}))
-	defer from.Close()
-
-	to := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Env", "test")
-		w.Header().Set("RequestPath", r.URL.Path)
-		wg.Done()
-	}))
-	defer to.Close()
-
-	quit := make(chan int)
-
-	Settings.middleware = "./examples/middleware/echo.sh"
-
-	// Catch traffic from one service
-	fromAddr := strings.Replace(from.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
-	input := NewRAWInput(fromAddr, EnginePcap, true, testRawExpire, "", "http", "", "", 0)
-	defer input.Close()
-
-	// And redirect to another
-	output := NewHTTPOutput(to.URL, &HTTPOutputConfig{Debug: false})
-
-	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
-	}
-	plugins.All = append(plugins.All, input, output)
-
-	// Start Gor
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
-
-	// Wait till middleware initialization
-	time.Sleep(100 * time.Millisecond)
-
-	// Should receive 2 requests from original + 2 from replayed
-	client := NewHTTPClient(from.URL, &HTTPClientConfig{Debug: false})
-
-	for i := 0; i < 10; i++ {
-		wg.Add(4)
-		// Request should be echoed
-		client.Get("/a")
-		time.Sleep(5 * time.Millisecond)
-		client.Get("/b")
-		time.Sleep(5 * time.Millisecond)
-	}
-
-	wg.Wait()
-	emitter.Close()
-	time.Sleep(200 * time.Millisecond)
-
-	Settings.middleware = ""
+	<-quit
+	midd.Close()
+	<-quit
 }
 
 func TestTokenMiddleware(t *testing.T) {
-	var resp, token []byte
-
-	wg := new(sync.WaitGroup)
-
-	from := NewFakeSecureService(wg, func(path string, status int, tok []byte) {
-		time.Sleep(10 * time.Millisecond)
-	})
-	defer from.Close()
-
-	to := NewFakeSecureService(wg, func(path string, status int, tok []byte) {
-		switch path {
-		case "/secure":
-			if status != 202 {
-				t.Error("Server should receive valid rewritten token")
+	quit := make(chan struct{})
+	in := NewTestInput()
+	in.skipHeader = true
+	cmd, cancl := initCmd(tokenModifier, noDebug)
+	midd := initMiddleware(cmd, cancl, in, func(err error) {})
+	req := []byte("1 932079936fa4306fc308d67588178d17d823647c 1439818823587396305 200\nGET /token HTTP/1.1\r\nHost: example.org\r\n\r\n")
+	res := []byte("2 932079936fa4306fc308d67588178d17d823647c 1439818823587396305 200\nHTTP/1.1 200 OK\r\nContent-Length: 10\r\nContent-Type: text/plain; charset=utf-8\r\n\r\n17d823647c")
+	rep := []byte("3 932079936fa4306fc308d67588178d17d823647c 1439818823587396305 200\nHTTP/1.1 200 OK\r\nContent-Length: 15\r\nContent-Type: text/plain; charset=utf-8\r\n\r\n932079936fa4306")
+	count := uint32(0)
+	out := NewTestOutput(func(msg *Message) {
+		if msg.Meta[0] == '1' && !bytes.Equal(payloadID(msg.Meta), payloadID(req)) {
+			token, _, _ := proto.PathParam(msg.Data, []byte("token"))
+			if !bytes.Equal(token, proto.Body(rep)) {
+				t.Error("expected the token to be equal to the replayed responses's token")
 			}
 		}
-
-		time.Sleep(10 * time.Millisecond)
+		atomic.AddUint32(&count, 1)
+		if atomic.LoadUint32(&count) == 2 {
+			quit <- struct{}{}
+		}
 	})
-	defer to.Close()
-
-	quit := make(chan int)
-
-	Settings.middleware = "go run ./examples/middleware/token_modifier.go"
-
-	fromAddr := strings.Replace(from.Listener.Addr().String(), "[::]", "127.0.0.1", -1)
-	// Catch traffic from one service
-	input := NewRAWInput(fromAddr, EnginePcap, true, testRawExpire, "", "http", "", "", 0)
-	defer input.Close()
-
-	// And redirect to another
-	output := NewHTTPOutput(to.URL, &HTTPOutputConfig{Debug: true})
-
-	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
-	}
-	plugins.All = append(plugins.All, input, output)
-
-	// Start Gor
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
-
-	// Wait for middleware to initialize
-	// Give go compiller time to build programm
-	time.Sleep(500 * time.Millisecond)
-
-	// Should receive 2 requests from original + 2 from replayed
-	wg.Add(4)
-
-	client := NewHTTPClient(from.URL, &HTTPClientConfig{Debug: true})
-
-	// Sending traffic to original service
-	resp, _ = client.Get("/token")
-	token = proto.Body(resp)
-
-	// When delay is too smal, middleware does not always rewrite requests in time
-	// Hopefuly client will have delay more then 100ms :)
-	time.Sleep(100 * time.Millisecond)
-
-	resp, _ = client.Get("/secure?token=" + string(token))
-	if !bytes.Equal(proto.Status(resp), []byte("202")) {
-		t.Error("Valid token should return 202:", proto.Status(resp))
-	}
-
-	wg.Wait()
-	emitter.Close()
-	time.Sleep(100 * time.Millisecond)
-	Settings.middleware = ""
+	pl := &InOutPlugins{}
+	pl.Inputs = []PluginReader{midd, in}
+	pl.Outputs = []PluginWriter{out}
+	pl.All = []interface{}{midd, out, in}
+	e := NewEmitter()
+	go e.Start(pl, "")
+	in.EmitBytes(req) // emit original request
+	in.EmitBytes(res) // emit its response
+	in.EmitBytes(rep) // emit replayed response
+	// emit the request which should have modified token
+	token := []byte("1 8e091765ae902fef8a2b7d9dd96 14398188235873 100\nGET /?token=17d823647c HTTP/1.1\r\nHost: example.org\r\n\r\n")
+	in.EmitBytes(token)
+	<-quit
+	midd.Close()
+}
+
+func TestMiddlewareWithPrettify(t *testing.T) {
+	Settings.PrettifyHTTP = true
+	quit := make(chan struct{})
+	in := NewTestInput()
+	cmd, cancl := initCmd(echoSh, noDebug)
+	midd := initMiddleware(cmd, cancl, in, func(err error) {})
+	var b1 = []byte("POST / HTTP/1.1\r\nHost: example.org\r\nTransfer-Encoding: chunked\r\n\r\n4\r\nWiki\r\n5\r\npedia\r\nE\r\n in\r\n\r\nchunks.\r\n0\r\n\r\n")
+	var b2 = []byte("POST / HTTP/1.1\r\nHost: example.org\r\nContent-Length: 25\r\n\r\nWikipedia in\r\n\r\nchunks.")
+	out := NewTestOutput(func(msg *Message) {
+		if !bytes.Equal(proto.Body(b2), proto.Body(msg.Data)) {
+			t.Errorf("expected %q body to equal %q body", b2, msg.Data)
+		}
+		quit <- struct{}{}
+	})
+	pl := &InOutPlugins{}
+	pl.Inputs = []PluginReader{midd, in}
+	pl.Outputs = []PluginWriter{out}
+	pl.All = []interface{}{midd, out, in}
+	e := NewEmitter()
+	go e.Start(pl, "")
+	in.EmitBytes(b1)
+	<-quit
+	midd.Close()
+	Settings.PrettifyHTTP = false
 }

output_binary.go

@@ -1,18 +1,19 @@
 package main
 
 import (
-	"io"
 	"sync/atomic"
 	"time"
+
+	"github.com/buger/goreplay/size"
 )
 
 // BinaryOutputConfig struct for holding binary output configuration
 type BinaryOutputConfig struct {
-	workers        int
-	Timeout        time.Duration
-	BufferSize     int
-	Debug          bool
-	TrackResponses bool
+	Workers        int           `json:"output-binary-workers"`
+	Timeout        time.Duration `json:"output-binary-timeout"`
+	BufferSize     size.Size     `json:"output-tcp-response-buffer"`
+	Debug          bool          `json:"output-binary-debug"`
+	TrackResponses bool          `json:"output-binary-track-response"`
 }
 
 // BinaryOutput plugin manage pool of workers which send request to replayed server
@@ -23,36 +24,33 @@ type BinaryOutput struct {
 	// alignment. atomic.* functions crash on 32bit machines if operand is not
 	// aligned at 64bit. See https://github.com/golang/go/issues/599
 	activeWorkers int64
-
-	address string
-	queue   chan []byte
-
-	responses chan response
-
-	needWorker chan int
-
-	config *BinaryOutputConfig
-
-	queueStats *GorStat
+	address       string
+	queue         chan *Message
+	responses     chan response
+	needWorker    chan int
+	quit          chan struct{}
+	config        *BinaryOutputConfig
+	queueStats    *GorStat
 }
 
 // NewBinaryOutput constructor for BinaryOutput
 // Initialize workers
-func NewBinaryOutput(address string, config *BinaryOutputConfig) io.Writer {
+func NewBinaryOutput(address string, config *BinaryOutputConfig) PluginReadWriter {
 	o := new(BinaryOutput)
 
 	o.address = address
 	o.config = config
 
-	o.queue = make(chan []byte, 1000)
+	o.queue = make(chan *Message, 1000)
 	o.responses = make(chan response, 1000)
 	o.needWorker = make(chan int, 1)
+	o.quit = make(chan struct{})
 
 	// Initial workers count
-	if o.config.workers == 0 {
+	if o.config.Workers == 0 {
 		o.needWorker <- initialDynamicWorkers
 	} else {
-		o.needWorker <- o.config.workers
+		o.needWorker <- o.config.Workers
 	}
 
 	go o.workerMaster()
@@ -68,7 +66,7 @@ func (o *BinaryOutput) workerMaster() {
 		}
 
 		// Disable dynamic scaling if workers poll fixed size
-		if o.config.workers != 0 {
+		if o.config.Workers != 0 {
 			return
 		}
 	}
@@ -78,7 +76,7 @@ func (o *BinaryOutput) startWorker() {
 	client := NewTCPClient(o.address, &TCPClientConfig{
 		Debug:              o.config.Debug,
 		Timeout:            o.config.Timeout,
-		ResponseBufferSize: o.config.BufferSize,
+		ResponseBufferSize: int(o.config.BufferSize),
 	})
 
 	deathCount := 0
@@ -87,12 +85,12 @@ func (o *BinaryOutput) startWorker() {
 
 	for {
 		select {
-		case data := <-o.queue:
-			o.sendRequest(client, data)
+		case msg := <-o.queue:
+			o.sendRequest(client, msg)
 			deathCount = 0
 		case <-time.After(time.Millisecond * 100):
 			// When dynamic scaling enabled workers die after 2s of inactivity
-			if o.config.workers == 0 {
+			if o.config.Workers == 0 {
 				deathCount++
 			} else {
 				continue
@@ -111,17 +109,15 @@ func (o *BinaryOutput) startWorker() {
 	}
 }
 
-func (o *BinaryOutput) Write(data []byte) (n int, err error) {
-	if !isRequestPayload(data) {
-		return len(data), nil
+// PluginWrite writes a message tothis plugin
+func (o *BinaryOutput) PluginWrite(msg *Message) (n int, err error) {
+	if !isRequestPayload(msg.Meta) {
+		return len(msg.Data), nil
 	}
 
-	buf := make([]byte, len(data))
-	copy(buf, data)
+	o.queue <- msg
 
-	o.queue <- buf
-
-	if o.config.workers == 0 {
+	if o.config.Workers == 0 {
 		workersCount := atomic.LoadInt64(&o.activeWorkers)
 
 		if len(o.queue) > int(workersCount) {
@@ -129,41 +125,37 @@ func (o *BinaryOutput) Write(data []byte) (n int, err error) {
 		}
 	}
 
-	return len(data), nil
+	return len(msg.Data) + len(msg.Meta), nil
 }
 
-func (o *BinaryOutput) Read(data []byte) (int, error) {
-	resp := <-o.responses
+// PluginRead reads a message from this plugin
+func (o *BinaryOutput) PluginRead() (*Message, error) {
+	var resp response
+	var msg Message
+	select {
+	case <-o.quit:
+		return nil, ErrorStopped
+	case resp = <-o.responses:
+	}
+	msg.Data = resp.payload
+	msg.Meta = payloadHeader(ReplayedResponsePayload, resp.uuid, resp.startedAt, resp.roundTripTime)
 
-	Debug("[OUTPUT-TCP] Received response:", string(resp.payload))
-
-	header := payloadHeader(ReplayedResponsePayload, resp.uuid, resp.startedAt, resp.roundTripTime)
-	copy(data[0:len(header)], header)
-	copy(data[len(header):], resp.payload)
-
-	return len(resp.payload) + len(header), nil
+	return &msg, nil
 }
 
-func (o *BinaryOutput) sendRequest(client *TCPClient, request []byte) {
-	meta := payloadMeta(request)
-	if len(meta) < 2 {
+func (o *BinaryOutput) sendRequest(client *TCPClient, msg *Message) {
+	if !isRequestPayload(msg.Meta) {
 		return
 	}
 
-	if !isRequestPayload(request) {
-		return
-	}
-
-	uuid := meta[1]
-
-	body := payloadBody(request)
+	uuid := payloadID(msg.Meta)
 
 	start := time.Now()
-	resp, err := client.Send(body)
+	resp, err := client.Send(msg.Data)
 	stop := time.Now()
 
 	if err != nil {
-		Debug("Request error:", err)
+		Debug(1, "Request error:", err)
 	}
 
 	if o.config.TrackResponses {
@@ -174,3 +166,9 @@ func (o *BinaryOutput) sendRequest(client *TCPClient, request []byte) {
 func (o *BinaryOutput) String() string {
 	return "Binary output: " + o.address
 }
+
+// Close closes this plugin for reading
+func (o *BinaryOutput) Close() error {
+	close(o.quit)
+	return nil
+}

output_dummy.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-	"fmt"
+	"os"
 )
 
 // DummyOutput used for debugging, prints all incoming requests
@@ -15,10 +15,16 @@ func NewDummyOutput() (di *DummyOutput) {
 	return
 }
 
-func (i *DummyOutput) Write(data []byte) (int, error) {
-	fmt.Println(string(data))
-
-	return len(data), nil
+// PluginWrite writes message to this plugin
+func (i *DummyOutput) PluginWrite(msg *Message) (int, error) {
+	var n, nn int
+	var err error
+	n, err = os.Stdout.Write(msg.Meta)
+	nn, err = os.Stdout.Write(msg.Data)
+	n += nn
+	nn, err = os.Stdout.Write(payloadSeparatorAsBytes)
+	n += nn
+	return n, err
 }
 
 func (i *DummyOutput) String() string {

output_file.go

@@ -15,6 +15,8 @@ import (
 	"strings"
 	"sync"
 	"time"
+
+	"github.com/buger/goreplay/size"
 )
 
 var dateFileNameFuncs = map[string]func(*FileOutput) string{
@@ -31,12 +33,12 @@ var dateFileNameFuncs = map[string]func(*FileOutput) string{
 
 // FileOutputConfig ...
 type FileOutputConfig struct {
-	flushInterval     time.Duration
-	sizeLimit         int64
-	outputFileMaxSize int64
-	queueLimit        int64
-	append            bool
-	bufferPath        string
+	FlushInterval     time.Duration `json:"output-file-flush-interval"`
+	SizeLimit         size.Size     `json:"output-file-size-limit"`
+	OutputFileMaxSize size.Size     `json:"output-file-max-size-limit"`
+	QueueLimit        int           `json:"output-file-queue-limit"`
+	Append            bool          `json:"output-file-append"`
+	BufferPath        string        `json:"output-file-buffer"`
 	onClose           func(string)
 }
 
@@ -46,14 +48,14 @@ type FileOutput struct {
 	pathTemplate   string
 	currentName    string
 	file           *os.File
-	queueLength    int64
+	QueueLength    int
 	chunkSize      int
 	writer         io.Writer
 	requestPerFile bool
 	currentID      []byte
 	payloadType    []byte
 	closed         bool
-	totalFileSize  int64
+	totalFileSize  size.Size
 
 	config *FileOutputConfig
 }
@@ -69,13 +71,13 @@ func NewFileOutput(pathTemplate string, config *FileOutputConfig) *FileOutput {
 		o.requestPerFile = true
 	}
 
-	if config.flushInterval == 0 {
-		config.flushInterval = 100 * time.Millisecond
+	if config.FlushInterval == 0 {
+		config.FlushInterval = 100 * time.Millisecond
 	}
 
 	go func() {
 		for {
-			time.Sleep(config.flushInterval)
+			time.Sleep(config.FlushInterval)
 			if o.IsClosed() {
 				break
 			}
@@ -150,12 +152,12 @@ func (o *FileOutput) filename() string {
 		path = strings.Replace(path, name, fn(o), -1)
 	}
 
-	if !o.config.append {
+	if !o.config.Append {
 		nextChunk := false
 
 		if o.currentName == "" ||
-			((o.config.queueLimit > 0 && o.queueLength >= o.config.queueLimit) ||
-				(o.config.sizeLimit > 0 && o.chunkSize >= int(o.config.sizeLimit))) {
+			((o.config.QueueLimit > 0 && o.QueueLength >= o.config.QueueLimit) ||
+				(o.config.SizeLimit > 0 && o.chunkSize >= int(o.config.SizeLimit))) {
 			nextChunk = true
 		}
 
@@ -193,10 +195,11 @@ func (o *FileOutput) updateName() {
 	o.Unlock()
 }
 
-func (o *FileOutput) Write(data []byte) (n int, err error) {
+// PluginWrite writes message to this plugin
+func (o *FileOutput) PluginWrite(msg *Message) (n int, err error) {
 	if o.requestPerFile {
 		o.Lock()
-		meta := payloadMeta(data)
+		meta := payloadMeta(msg.Meta)
 		o.currentID = meta[1]
 		o.payloadType = meta[0]
 		o.Unlock()
@@ -222,29 +225,31 @@ func (o *FileOutput) Write(data []byte) (n int, err error) {
 			log.Fatal(o, "Cannot open file %q. Error: %s", o.currentName, err)
 		}
 
-		o.queueLength = 0
+		o.QueueLength = 0
 	}
 
-	n, _ = o.writer.Write(data)
-	nSeparator, _ := o.writer.Write([]byte(payloadSeparator))
+	var nn int
+	n, err = o.writer.Write(msg.Meta)
+	nn, err = o.writer.Write(msg.Data)
+	n += nn
+	nn, err = o.writer.Write(payloadSeparatorAsBytes)
+	n += nn
 
-	n += nSeparator
+	o.totalFileSize += size.Size(n)
+	o.QueueLength++
 
-	o.totalFileSize += int64(n)
-	o.queueLength++
-
-	if Settings.outputFileConfig.outputFileMaxSize > 0 && o.totalFileSize >= Settings.outputFileConfig.outputFileMaxSize {
+	if Settings.OutputFileConfig.OutputFileMaxSize > 0 && o.totalFileSize >= Settings.OutputFileConfig.OutputFileMaxSize {
 		return n, errors.New("File output reached size limit")
 	}
 
-	return n, nil
+	return n, err
 }
 
 func (o *FileOutput) flush() {
 	// Don't exit on panic
 	defer func() {
 		if r := recover(); r != nil {
-			log.Println("PANIC while file flush: ", r, o, string(debug.Stack()))
+			Debug(0, "[OUTPUT-FILE] PANIC while file flush: ", r, o, string(debug.Stack()))
 		}
 	}()
 
@@ -261,7 +266,7 @@ func (o *FileOutput) flush() {
 		if stat, err := o.file.Stat(); err == nil {
 			o.chunkSize = int(stat.Size())
 		} else {
-			log.Println("Error accessing file sats", err)
+			Debug(0, "[OUTPUT-HTTP] error accessing file size", err)
 		}
 	}
 }

output_file_test.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"fmt"
-	"io"
 	"math/rand"
 	"os"
 	"reflect"
@@ -11,23 +10,24 @@ import (
 	"sync/atomic"
 	"testing"
 	"time"
+
+	"github.com/buger/goreplay/size"
 )
 
 func TestFileOutput(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
-	output := NewFileOutput("/tmp/test_requests.gor", &FileOutputConfig{flushInterval: time.Minute, append: true})
+	output := NewFileOutput("/tmp/test_requests.gor", &FileOutputConfig{FlushInterval: time.Minute, Append: true})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	for i := 0; i < 100; i++ {
 		wg.Add(2)
@@ -40,27 +40,26 @@ func TestFileOutput(t *testing.T) {
 
 	var counter int64
 	input2 := NewFileInput("/tmp/test_requests.gor", false)
-	output2 := NewTestOutput(func(data []byte) {
+	output2 := NewTestOutput(func(*Message) {
 		atomic.AddInt64(&counter, 1)
 		wg.Done()
 	})
 
 	plugins2 := &InOutPlugins{
-		Inputs:  []io.Reader{input2},
-		Outputs: []io.Writer{output2},
+		Inputs:  []PluginReader{input2},
+		Outputs: []PluginWriter{output2},
 	}
 	plugins2.All = append(plugins2.All, input2, output2)
 
-	quit2 := make(chan int)
-	emitter2 := NewEmitter(quit2)
-	go emitter2.Start(plugins2, Settings.middleware)
+	emitter2 := NewEmitter()
+	go emitter2.Start(plugins2, Settings.Middleware)
 
 	wg.Wait()
 	emitter2.Close()
 }
 
 func TestFileOutputWithNameCleaning(t *testing.T) {
-	output := &FileOutput{pathTemplate: "./test_requests.gor", config: &FileOutputConfig{flushInterval: time.Minute, append: false}}
+	output := &FileOutput{pathTemplate: "./test_requests.gor", config: &FileOutputConfig{FlushInterval: time.Minute, Append: false}}
 	expectedFileName := "test_requests_0.gor"
 	output.updateName()
 
@@ -71,7 +70,7 @@ func TestFileOutputWithNameCleaning(t *testing.T) {
 }
 
 func TestFileOutputPathTemplate(t *testing.T) {
-	output := &FileOutput{pathTemplate: "/tmp/log-%Y-%m-%d-%S-%t", config: &FileOutputConfig{flushInterval: time.Minute, append: true}}
+	output := &FileOutput{pathTemplate: "/tmp/log-%Y-%m-%d-%S-%t", config: &FileOutputConfig{FlushInterval: time.Minute, Append: true}}
 	now := time.Now()
 	output.payloadType = []byte("3")
 	expectedPath := fmt.Sprintf("/tmp/log-%s-%s-%s-%s-3", now.Format("2006"), now.Format("01"), now.Format("02"), now.Format("05"))
@@ -83,22 +82,22 @@ func TestFileOutputPathTemplate(t *testing.T) {
 }
 
 func TestFileOutputMultipleFiles(t *testing.T) {
-	output := NewFileOutput("/tmp/log-%Y-%m-%d-%S", &FileOutputConfig{append: true, flushInterval: time.Minute})
+	output := NewFileOutput("/tmp/log-%Y-%m-%d-%S", &FileOutputConfig{Append: true, FlushInterval: time.Minute})
 
 	if output.file != nil {
 		t.Error("Should not initialize file if no writes")
 	}
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name1 := output.file.Name()
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name2 := output.file.Name()
 
 	time.Sleep(time.Second)
 	output.updateName()
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name3 := output.file.Name()
 
 	if name2 != name1 {
@@ -114,22 +113,22 @@ func TestFileOutputMultipleFiles(t *testing.T) {
 }
 
 func TestFileOutputFilePerRequest(t *testing.T) {
-	output := NewFileOutput("/tmp/log-%Y-%m-%d-%S-%r", &FileOutputConfig{append: true})
+	output := NewFileOutput("/tmp/log-%Y-%m-%d-%S-%r", &FileOutputConfig{Append: true})
 
 	if output.file != nil {
 		t.Error("Should not initialize file if no writes")
 	}
 
-	output.Write([]byte("1 1 1\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name1 := output.file.Name()
 
-	output.Write([]byte("1 2 1\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 2 1\r\n"), Data: []byte("test")})
 	name2 := output.file.Name()
 
 	time.Sleep(time.Second)
 	output.updateName()
 
-	output.Write([]byte("1 3 1\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 3 1\r\n"), Data: []byte("test")})
 	name3 := output.file.Name()
 
 	if name3 == name2 || name2 == name1 || name3 == name1 {
@@ -142,14 +141,14 @@ func TestFileOutputFilePerRequest(t *testing.T) {
 }
 
 func TestFileOutputCompression(t *testing.T) {
-	output := NewFileOutput("/tmp/log-%Y-%m-%d-%S.gz", &FileOutputConfig{append: true, flushInterval: time.Minute})
+	output := NewFileOutput("/tmp/log-%Y-%m-%d-%S.gz", &FileOutputConfig{Append: true, FlushInterval: time.Minute})
 
 	if output.file != nil {
 		t.Error("Should not initialize file if no writes")
 	}
 
 	for i := 0; i < 1000; i++ {
-		output.Write([]byte("1 1 1\r\ntest"))
+		output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	}
 
 	name := output.file.Name()
@@ -163,30 +162,6 @@ func TestFileOutputCompression(t *testing.T) {
 	os.Remove(name)
 }
 
-func TestParseDataUnit(t *testing.T) {
-	var d = map[string]int64{
-		"42mb":                 42 << 20,
-		"4_2":                  42,
-		"00":                   0,
-		"\n\n 0.0\r\t\f":       0,
-		"0_600tb":              384 << 40,
-		"0600Tb":               384 << 40,
-		"0o12Mb":               10 << 20,
-		"0b_10010001111_1kb":   2335 << 10,
-		"1024":                 1 << 10,
-		"0b111":                7,
-		"0x12gB":               18 << 30,
-		"0x_67_7a_2f_cc_40_c6": 113774485586118,
-		"121562380192901":      121562380192901,
-	}
-	for k, v := range d {
-		n, err := bufferParser(k, "0")
-		if err != nil || n != v {
-			t.Errorf("Error parsing %s: %v", k, err)
-		}
-	}
-}
-
 func TestGetFileIndex(t *testing.T) {
 	var tests = []struct {
 		path  string
@@ -230,17 +205,17 @@ func TestFileOutputAppendQueueLimitOverflow(t *testing.T) {
 	rnd := rand.Int63()
 	name := fmt.Sprintf("/tmp/%d", rnd)
 
-	output := NewFileOutput(name, &FileOutputConfig{append: false, flushInterval: time.Minute, queueLimit: 2})
+	output := NewFileOutput(name, &FileOutputConfig{Append: false, FlushInterval: time.Minute, QueueLimit: 2})
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name1 := output.file.Name()
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name2 := output.file.Name()
 
 	output.updateName()
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name3 := output.file.Name()
 
 	if name2 != name1 || name1 != fmt.Sprintf("/tmp/%d_0", rnd) {
@@ -259,17 +234,17 @@ func TestFileOutputAppendQueueLimitNoOverflow(t *testing.T) {
 	rnd := rand.Int63()
 	name := fmt.Sprintf("/tmp/%d", rnd)
 
-	output := NewFileOutput(name, &FileOutputConfig{append: false, flushInterval: time.Minute, queueLimit: 3})
+	output := NewFileOutput(name, &FileOutputConfig{Append: false, FlushInterval: time.Minute, QueueLimit: 3})
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name1 := output.file.Name()
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name2 := output.file.Name()
 
 	output.updateName()
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name3 := output.file.Name()
 
 	if name2 != name1 || name1 != fmt.Sprintf("/tmp/%d_0", rnd) {
@@ -288,17 +263,17 @@ func TestFileOutputAppendQueueLimitGzips(t *testing.T) {
 	rnd := rand.Int63()
 	name := fmt.Sprintf("/tmp/%d.gz", rnd)
 
-	output := NewFileOutput(name, &FileOutputConfig{append: false, flushInterval: time.Minute, queueLimit: 2})
+	output := NewFileOutput(name, &FileOutputConfig{Append: false, FlushInterval: time.Minute, QueueLimit: 2})
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name1 := output.file.Name()
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name2 := output.file.Name()
 
 	output.updateName()
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name3 := output.file.Name()
 
 	if name2 != name1 || name1 != fmt.Sprintf("/tmp/%d_0.gz", rnd) {
@@ -331,18 +306,18 @@ func TestFileOutputAppendSizeLimitOverflow(t *testing.T) {
 
 	messageSize := len(message) + len(payloadSeparator)
 
-	output := NewFileOutput(name, &FileOutputConfig{append: false, flushInterval: time.Minute, sizeLimit: 2 * int64(messageSize)})
+	output := NewFileOutput(name, &FileOutputConfig{Append: false, FlushInterval: time.Minute, SizeLimit: size.Size(2 * messageSize)})
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name1 := output.file.Name()
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name2 := output.file.Name()
 
 	output.flush()
 	output.updateName()
 
-	output.Write([]byte("1 1 1\r\ntest"))
+	output.PluginWrite(&Message{Meta: []byte("1 1 1\r\n"), Data: []byte("test")})
 	name3 := output.file.Name()
 
 	if name2 != name1 || name1 != fmt.Sprintf("/tmp/%d_0", rnd) {

output_http.go

@@ -1,57 +1,26 @@
 package main
 
 import (
+	"bufio"
+	"bytes"
+	"crypto/tls"
 	"fmt"
-	"io"
 	"log"
+	"math"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
 	"sync/atomic"
 	"time"
 
-	"github.com/buger/goreplay/proto"
+	"github.com/buger/goreplay/size"
 )
 
-var _ = fmt.Println
-
-const initialDynamicWorkers = 10
-
-type httpWorker struct {
-	output       *HTTPOutput
-	client       *HTTPClient
-	lastActivity time.Time
-	queue        chan []byte
-	stop         chan bool
-}
-
-func newHTTPWorker(output *HTTPOutput, queue chan []byte) *httpWorker {
-	client := NewHTTPClient(output.address, &HTTPClientConfig{
-		FollowRedirects:    output.config.redirectLimit,
-		Debug:              output.config.Debug,
-		OriginalHost:       output.config.OriginalHost,
-		Timeout:            output.config.Timeout,
-		ResponseBufferSize: output.config.BufferSize,
-	})
-
-	w := &httpWorker{client: client}
-	if queue == nil {
-		w.queue = make(chan []byte, 100)
-	} else {
-		w.queue = queue
-	}
-	w.stop = make(chan bool)
-
-	go func() {
-		for {
-			select {
-			case payload := <-w.queue:
-				output.sendRequest(client, payload)
-			case <-w.stop:
-				return
-			}
-		}
-	}()
-
-	return w
-}
+const (
+	initialDynamicWorkers = 10
+	readChunkSize         = 64 * 1024
+	maxResponseSize       = 1073741824
+)
 
 type response struct {
 	payload       []byte
@@ -62,271 +31,295 @@ type response struct {
 
 // HTTPOutputConfig struct for holding http output configuration
 type HTTPOutputConfig struct {
-	redirectLimit int
-
-	stats      bool
-	workersMin int
-	workersMax int
-	statsMs    int
-	workers    int
-	queueLen   int
-
-	elasticSearch string
-
-	Timeout      time.Duration
-	OriginalHost bool
-	BufferSize   int
-
-	CompatibilityMode bool
-
-	RequestGroup string
-
-	Debug bool
-
-	TrackResponses bool
+	TrackResponses bool          `json:"output-http-track-response"`
+	Stats          bool          `json:"output-http-stats"`
+	OriginalHost   bool          `json:"output-http-original-host"`
+	RedirectLimit  int           `json:"output-http-redirect-limit"`
+	WorkersMin     int           `json:"output-http-workers-min"`
+	WorkersMax     int           `json:"output-http-workers"`
+	StatsMs        int           `json:"output-http-stats-ms"`
+	QueueLen       int           `json:"output-http-queue-len"`
+	ElasticSearch  string        `json:"output-http-elasticsearch"`
+	Timeout        time.Duration `json:"output-http-timeout"`
+	WorkerTimeout  time.Duration `json:"output-http-worker-timeout"`
+	BufferSize     size.Size     `json:"output-http-response-buffer"`
+	SkipVerify     bool          `json:"output-http-skip-verify"`
+	rawURL         string
+	url            *url.URL
 }
 
 // HTTPOutput plugin manage pool of workers which send request to replayed server
-// By default workers pool is dynamic and starts with 10 workers
-// You can specify fixed number of workers using `--output-http-workers`
+// By default workers pool is dynamic and starts with 1 worker or workerMin workers
+// You can specify maximum number of workers using `--output-http-workers`
 type HTTPOutput struct {
-	// Keep this as first element of struct because it guarantees 64bit
-	// alignment. atomic.* functions crash on 32bit machines if operand is not
-	// aligned at 64bit. See https://github.com/golang/go/issues/599
-	activeWorkers int64
-
-	workerSessions map[string]*httpWorker
-
-	address string
-	limit   int
-	queue   chan []byte
-
-	responses chan response
-
-	needWorker chan int
-
-	config *HTTPOutputConfig
-
-	queueStats *GorStat
-
+	activeWorkers int32
+	config        *HTTPOutputConfig
+	queueStats    *GorStat
 	elasticSearch *ESPlugin
-
-	stop chan bool // Channel used only to indicate goroutine should shutdown
+	client        *HTTPClient
+	stopWorker    chan struct{}
+	queue         chan *Message
+	responses     chan *response
+	stop          chan bool // Channel used only to indicate goroutine should shutdown
 }
 
 // NewHTTPOutput constructor for HTTPOutput
 // Initialize workers
-func NewHTTPOutput(address string, config *HTTPOutputConfig) io.Writer {
+func NewHTTPOutput(address string, config *HTTPOutputConfig) PluginReadWriter {
 	o := new(HTTPOutput)
-
-	o.address = address
+	var err error
+	config.url, err = url.Parse(address)
+	if err != nil {
+		log.Fatal(fmt.Sprintf("[OUTPUT-HTTP] parse HTTP output URL error[%q]", err))
+	}
+	if config.url.Scheme == "" {
+		config.url.Scheme = "http"
+	}
+	config.rawURL = config.url.String()
+	if config.Timeout < time.Millisecond*100 {
+		config.Timeout = time.Second
+	}
+	if config.BufferSize <= 0 {
+		config.BufferSize = 100 * 1024 // 100kb
+	}
+	if config.WorkersMin <= 0 {
+		config.WorkersMin = 1
+	}
+	if config.WorkersMin > 1000 {
+		config.WorkersMin = 1000
+	}
+	if config.WorkersMax <= 0 {
+		config.WorkersMax = math.MaxInt32 // idealy so large
+	}
+	if config.WorkersMax < config.WorkersMin {
+		config.WorkersMax = config.WorkersMin
+	}
+	if config.QueueLen <= 0 {
+		config.QueueLen = 1000
+	}
+	if config.RedirectLimit < 0 {
+		config.RedirectLimit = 0
+	}
+	if config.WorkerTimeout <= 0 {
+		config.WorkerTimeout = time.Second * 2
+	}
 	o.config = config
 	o.stop = make(chan bool)
-
-	if o.config.stats {
-		o.queueStats = NewGorStat("output_http", o.config.statsMs)
+	if o.config.Stats {
+		o.queueStats = NewGorStat("output_http", o.config.StatsMs)
 	}
 
-	o.queue = make(chan []byte, o.config.queueLen)
-	o.responses = make(chan response, o.config.queueLen)
-	o.needWorker = make(chan int, 1)
-
-	// Initial workers count
-	if o.config.workersMax == 0 {
-		o.needWorker <- initialDynamicWorkers
-	} else {
-		o.needWorker <- o.config.workersMax
+	o.queue = make(chan *Message, o.config.QueueLen)
+	if o.config.TrackResponses {
+		o.responses = make(chan *response, o.config.QueueLen)
 	}
+	// it should not be buffered to avoid races
+	o.stopWorker = make(chan struct{})
 
-	if o.config.elasticSearch != "" {
+	if o.config.ElasticSearch != "" {
 		o.elasticSearch = new(ESPlugin)
-		o.elasticSearch.Init(o.config.elasticSearch)
+		o.elasticSearch.Init(o.config.ElasticSearch)
 	}
-
-	if Settings.recognizeTCPSessions {
-		if !PRO {
-			log.Fatal("Detailed TCP sessions work only with PRO license")
-		}
-		o.workerSessions = make(map[string]*httpWorker, 100)
-		go o.sessionWorkerMaster()
-	} else {
-		go o.workerMaster()
+	o.client = NewHTTPClient(o.config)
+	o.activeWorkers += int32(o.config.WorkersMin)
+	for i := 0; i < o.config.WorkersMin; i++ {
+		go o.startWorker()
 	}
-
+	go o.workerMaster()
 	return o
 }
 
 func (o *HTTPOutput) workerMaster() {
-	for {
-		newWorkers := <-o.needWorker
-		atomic.AddInt64(&o.activeWorkers, int64(newWorkers))
-		for i := 0; i < newWorkers; i++ {
-			go o.startWorker()
-		}
-	}
-}
-
-func (o *HTTPOutput) sessionWorkerMaster() {
-	gc := time.Tick(time.Second)
-
-	for {
-		select {
-		case p := <-o.queue:
-			id := payloadID(p)
-			sessionID := string(id[0:20])
-			worker, ok := o.workerSessions[sessionID]
-
-			if !ok {
-				atomic.AddInt64(&o.activeWorkers, 1)
-				worker = newHTTPWorker(o, nil)
-				o.workerSessions[sessionID] = worker
-			}
-
-			worker.queue <- p
-			worker.lastActivity = time.Now()
-		case <-gc:
-			now := time.Now()
-
-			for id, w := range o.workerSessions {
-				if !w.lastActivity.IsZero() && now.Sub(w.lastActivity) >= 120*time.Second {
-					w.stop <- true
-					delete(o.workerSessions, id)
-					atomic.AddInt64(&o.activeWorkers, -1)
-				}
-			}
-		}
-	}
-}
-
-func (o *HTTPOutput) startWorker() {
-	client := NewHTTPClient(o.address, &HTTPClientConfig{
-		FollowRedirects:    o.config.redirectLimit,
-		Debug:              o.config.Debug,
-		OriginalHost:       o.config.OriginalHost,
-		Timeout:            o.config.Timeout,
-		ResponseBufferSize: o.config.BufferSize,
-		CompatibilityMode:  o.config.CompatibilityMode,
-	})
-
+	var timer = time.NewTimer(o.config.WorkerTimeout)
+	defer func() {
+		// recover from panics caused by trying to send in
+		// a closed chan(o.stopWorker)
+		recover()
+	}()
+	defer timer.Stop()
 	for {
 		select {
 		case <-o.stop:
 			return
-		case data := <-o.queue:
-			o.sendRequest(client, data)
-		case <-time.After(2 * time.Second):
-			// When dynamic scaling enabled workers die after 2s of inactivity
-			if o.config.workersMin == o.config.workersMax {
-				continue
-			}
+		default:
+			<-timer.C
+		}
+		// rollback workers
+	rollback:
+		if atomic.LoadInt32(&o.activeWorkers) > int32(o.config.WorkersMin) && len(o.queue) < 1 {
+			// close one worker
+			o.stopWorker <- struct{}{}
+			atomic.AddInt32(&o.activeWorkers, -1)
+			goto rollback
+		}
+		timer.Reset(o.config.WorkerTimeout)
+	}
+}
 
-			workersCount := int(atomic.LoadInt64(&o.activeWorkers))
-
-			// At least 1 startWorker should be alive
-			if workersCount != 1 && workersCount > o.config.workersMin {
-				atomic.AddInt64(&o.activeWorkers, -1)
-				return
-			}
+func (o *HTTPOutput) startWorker() {
+	for {
+		select {
+		case <-o.stopWorker:
+			return
+		case msg := <-o.queue:
+			o.sendRequest(o.client, msg)
 		}
 	}
 }
 
-func (o *HTTPOutput) Write(data []byte) (n int, err error) {
-	if !isRequestPayload(data) {
-		return len(data), nil
+// PluginWrite writes message to this plugin
+func (o *HTTPOutput) PluginWrite(msg *Message) (n int, err error) {
+	if !isRequestPayload(msg.Meta) {
+		return len(msg.Data), nil
 	}
 
-	buf := make([]byte, len(data))
-	copy(buf, data)
-
 	select {
 	case <-o.stop:
 		return 0, ErrorStopped
-	case o.queue <- buf:
+	case o.queue <- msg:
 	}
 
-	if o.config.stats {
+	if o.config.Stats {
 		o.queueStats.Write(len(o.queue))
 	}
-
-	if !Settings.recognizeTCPSessions && o.config.workersMax != o.config.workersMin {
-		workersCount := int(atomic.LoadInt64(&o.activeWorkers))
-
-		if len(o.queue) > workersCount {
-			extraWorkersReq := len(o.queue) - workersCount + 1
-			maxWorkersAvailable := o.config.workersMax - workersCount
-			if extraWorkersReq > maxWorkersAvailable {
-				extraWorkersReq = maxWorkersAvailable
-			}
-			if extraWorkersReq > 0 {
-				o.needWorker <- extraWorkersReq
-			}
+	if len(o.queue) > 0 {
+		// try to start a new worker to serve
+		if atomic.LoadInt32(&o.activeWorkers) < int32(o.config.WorkersMax) {
+			go o.startWorker()
+			atomic.AddInt32(&o.activeWorkers, 1)
 		}
 	}
-
-	return len(data), nil
+	return len(msg.Data) + len(msg.Meta), nil
 }
 
-func (o *HTTPOutput) Read(data []byte) (int, error) {
-	var resp response
+// PluginRead reads message from this plugin
+func (o *HTTPOutput) PluginRead() (*Message, error) {
+	if !o.config.TrackResponses {
+		return nil, ErrorStopped
+	}
+	var resp *response
+	var msg Message
 	select {
 	case <-o.stop:
-		return 0, ErrorStopped
+		return nil, ErrorStopped
 	case resp = <-o.responses:
+		msg.Data = resp.payload
 	}
 
-	if Settings.debug {
-		Debug("[OUTPUT-HTTP] Received response:", string(resp.payload))
-	}
+	msg.Meta = payloadHeader(ReplayedResponsePayload, resp.uuid, resp.roundTripTime, resp.startedAt)
 
-	header := payloadHeader(ReplayedResponsePayload, resp.uuid, resp.roundTripTime, resp.startedAt)
-	copy(data[0:len(header)], header)
-	copy(data[len(header):], resp.payload)
-
-	return len(resp.payload) + len(header), nil
+	return &msg, nil
 }
 
-func (o *HTTPOutput) sendRequest(client *HTTPClient, request []byte) {
-	meta := payloadMeta(request)
-
-	if Settings.debug {
-		Debug(meta)
-	}
-
-	if len(meta) < 2 {
+func (o *HTTPOutput) sendRequest(client *HTTPClient, msg *Message) {
+	if !isRequestPayload(msg.Meta) {
 		return
 	}
-	uuid := meta[1]
-
-	body := payloadBody(request)
-	if !proto.IsHTTPPayload(body) {
-		return
-	}
-
+	uuid := payloadID(msg.Meta)
 	start := time.Now()
-	resp, err := client.Send(body)
+	resp, err := client.Send(msg.Data)
 	stop := time.Now()
 
 	if err != nil {
-		log.Println("Error when sending ", err, time.Now())
-		Debug("Request error:", err)
+		Debug(1, fmt.Sprintf("[HTTP-OUTPUT] error when sending: %q", err))
+		return
+	}
+	if resp == nil {
+		return
 	}
 
 	if o.config.TrackResponses {
-		o.responses <- response{resp, uuid, start.UnixNano(), stop.UnixNano() - start.UnixNano()}
+		o.responses <- &response{resp, uuid, start.UnixNano(), stop.UnixNano() - start.UnixNano()}
 	}
 
 	if o.elasticSearch != nil {
-		o.elasticSearch.ResponseAnalyze(request, resp, start, stop)
+		o.elasticSearch.ResponseAnalyze(msg.Data, resp, start, stop)
 	}
 }
 
 func (o *HTTPOutput) String() string {
-	return "HTTP output: " + o.address
+	return "HTTP output: " + o.config.rawURL
 }
 
 // Close closes the data channel so that data
 func (o *HTTPOutput) Close() error {
 	close(o.stop)
+	close(o.stopWorker)
 	return nil
 }
+
+// HTTPClient holds configurations for a single HTTP client
+type HTTPClient struct {
+	config *HTTPOutputConfig
+	Client *http.Client
+}
+
+// NewHTTPClient returns new http client with check redirects policy
+func NewHTTPClient(config *HTTPOutputConfig) *HTTPClient {
+	client := new(HTTPClient)
+	client.config = config
+	var transport *http.Transport
+	client.Client = &http.Client{
+		Timeout: client.config.Timeout,
+		CheckRedirect: func(req *http.Request, via []*http.Request) error {
+			if len(via) >= client.config.RedirectLimit {
+				Debug(1, fmt.Sprintf("[HTTPCLIENT] maximum output-http-redirects[%d] reached!", client.config.RedirectLimit))
+				return http.ErrUseLastResponse
+			}
+			lastReq := via[len(via)-1]
+			resp := req.Response
+			Debug(2, fmt.Sprintf("[HTTPCLIENT] HTTP redirects from %q to %q with %q", lastReq.Host, req.Host, resp.Status))
+			return nil
+		},
+	}
+	if config.SkipVerify {
+		// clone to avoid modying global default RoundTripper
+		transport = http.DefaultTransport.(*http.Transport).Clone()
+		transport.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
+		client.Client.Transport = transport
+	}
+
+	return client
+}
+
+// Send sends an http request using client create by NewHTTPClient
+func (c *HTTPClient) Send(data []byte) ([]byte, error) {
+	var req *http.Request
+	var resp *http.Response
+	var err error
+
+	req, err = http.ReadRequest(bufio.NewReader(bytes.NewReader(data)))
+	if err != nil {
+		return nil, err
+	}
+	// we don't send CONNECT or OPTIONS request
+	if req.Method == http.MethodConnect {
+		return nil, nil
+	}
+
+	if !c.config.OriginalHost {
+		req.Host = c.config.url.Host
+	}
+
+	// fix #862
+	if c.config.url.Path == "" && c.config.url.RawQuery == "" {
+		req.URL.Scheme = c.config.url.Scheme
+		req.URL.Host = c.config.url.Host
+	} else {
+		req.URL = c.config.url
+	}
+
+	// force connection to not be closed, which can affect the global client
+	req.Close = false
+	// it's an error if this is not equal to empty string
+	req.RequestURI = ""
+
+	resp, err = c.Client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	if c.config.TrackResponses {
+		return httputil.DumpResponse(resp, true)
+	}
+	return nil, nil
+}

output_http_test.go

@@ -1,20 +1,16 @@
 package main
 
 import (
-	"io"
 	"io/ioutil"
 	"net/http"
 	"net/http/httptest"
 	_ "net/http/httputil"
 	"sync"
-	"sync/atomic"
 	"testing"
-	"time"
 )
 
 func TestHTTPOutput(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
 
@@ -40,47 +36,40 @@ func TestHTTPOutput(t *testing.T) {
 	}))
 	defer server.Close()
 
-	headers := HTTPHeaders{HTTPHeader{"User-Agent", "Gor"}}
+	headers := HTTPHeaders{httpHeader{"User-Agent", "Gor"}}
 	methods := HTTPMethods{[]byte("GET"), []byte("PUT"), []byte("POST")}
-	Settings.modifierConfig = HTTPModifierConfig{headers: headers, methods: methods}
+	Settings.ModifierConfig = HTTPModifierConfig{Headers: headers, Methods: methods}
 
-	http_output := NewHTTPOutput(server.URL, &HTTPOutputConfig{Debug: true, TrackResponses: true})
-	output := NewTestOutput(func(data []byte) {
+	httpOutput := NewHTTPOutput(server.URL, &HTTPOutputConfig{TrackResponses: false})
+	output := NewTestOutput(func(*Message) {
 		wg.Done()
 	})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{http_output, output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{httpOutput, output},
 	}
-	plugins.All = append(plugins.All, input, output, http_output)
+	plugins.All = append(plugins.All, input, output, httpOutput)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	for i := 0; i < 10; i++ {
-		// 2 http-output, 2 - test output request, 2 - test output http response
-		wg.Add(6) // OPTIONS should be ignored
+		// 2 http-output, 2 - test output request
+		wg.Add(4) // OPTIONS should be ignored
 		input.EmitPOST()
 		input.EmitOPTIONS()
 		input.EmitGET()
 	}
 
 	wg.Wait()
-	close(quit)
+	emitter.Close()
 
-	activeWorkers := atomic.LoadInt64(&http_output.(*HTTPOutput).activeWorkers)
-
-	if activeWorkers < 50 {
-		t.Error("Should create workers for each request", activeWorkers)
-	}
-
-	Settings.modifierConfig = HTTPModifierConfig{}
+	Settings.ModifierConfig = HTTPModifierConfig{}
 }
 
 func TestHTTPOutputKeepOriginalHost(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
 
@@ -93,31 +82,30 @@ func TestHTTPOutputKeepOriginalHost(t *testing.T) {
 	}))
 	defer server.Close()
 
-	headers := HTTPHeaders{HTTPHeader{"Host", "custom-host.com"}}
-	Settings.modifierConfig = HTTPModifierConfig{headers: headers}
+	headers := HTTPHeaders{httpHeader{"Host", "custom-host.com"}}
+	Settings.ModifierConfig = HTTPModifierConfig{Headers: headers}
 
-	output := NewHTTPOutput(server.URL, &HTTPOutputConfig{Debug: false, OriginalHost: true})
+	output := NewHTTPOutput(server.URL, &HTTPOutputConfig{OriginalHost: true, SkipVerify: true})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	wg.Add(1)
 	input.EmitGET()
 
 	wg.Wait()
 	emitter.Close()
-	Settings.modifierConfig = HTTPModifierConfig{}
+	Settings.ModifierConfig = HTTPModifierConfig{}
 }
 
 func TestHTTPOutputSSL(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	// Origing and Replay server initialization
 	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
@@ -125,16 +113,16 @@ func TestHTTPOutputSSL(t *testing.T) {
 	}))
 
 	input := NewTestInput()
-	output := NewHTTPOutput(server.URL, &HTTPOutputConfig{})
+	output := NewHTTPOutput(server.URL, &HTTPOutputConfig{SkipVerify: true})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	wg.Add(2)
 
@@ -147,7 +135,6 @@ func TestHTTPOutputSSL(t *testing.T) {
 
 func TestHTTPOutputSessions(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	input := NewTestInput()
 	input.skipHeader = true
@@ -157,26 +144,28 @@ func TestHTTPOutputSessions(t *testing.T) {
 	}))
 	defer server.Close()
 
-	Settings.recognizeTCPSessions = true
-	output := NewHTTPOutput(server.URL, &HTTPOutputConfig{Debug: true})
+	Settings.RecognizeTCPSessions = true
+	Settings.SplitOutput = true
+	output := NewHTTPOutput(server.URL, &HTTPOutputConfig{})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	plugins.All = append(plugins.All, input, output)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	uuid1 := []byte("1234567890123456789a0000")
 	uuid2 := []byte("1234567890123456789d0000")
 
-	for i := 0; i < 100; i++ {
+	for i := 0; i < 10; i++ {
 		wg.Add(1) // OPTIONS should be ignored
 		copy(uuid1[20:], randByte(4))
 		input.EmitBytes([]byte("1 " + string(uuid1) + " 1\n" + "GET / HTTP/1.1\r\n\r\n"))
 	}
 
-	for i := 0; i < 100; i++ {
+	for i := 0; i < 10; i++ {
 		wg.Add(1) // OPTIONS should be ignored
 		copy(uuid2[20:], randByte(4))
 		input.EmitBytes([]byte("1 " + string(uuid2) + " 1\n" + "GET / HTTP/1.1\r\n\r\n"))
@@ -184,36 +173,60 @@ func TestHTTPOutputSessions(t *testing.T) {
 
 	wg.Wait()
 
-	if output.(*HTTPOutput).activeWorkers != 2 {
-		t.Error("Should have only 2 workers", output.(*HTTPOutput).activeWorkers)
-	}
-
 	emitter.Close()
 
-	Settings.recognizeTCPSessions = false
+	Settings.RecognizeTCPSessions = false
+	Settings.SplitOutput = false
 }
 
 func BenchmarkHTTPOutput(b *testing.B) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
-	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		time.Sleep(50 * time.Millisecond)
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		wg.Done()
 	}))
 	defer server.Close()
 
 	input := NewTestInput()
-	output := NewHTTPOutput(server.URL, &HTTPOutputConfig{})
+	output := NewHTTPOutput(server.URL, &HTTPOutputConfig{WorkersMax: 1})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
 	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
+
+	for i := 0; i < b.N; i++ {
+		wg.Add(1)
+		input.EmitPOST()
+	}
+
+	wg.Wait()
+	emitter.Close()
+}
+
+func BenchmarkHTTPOutputTLS(b *testing.B) {
+	wg := new(sync.WaitGroup)
+
+	server := httptest.NewTLSServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		wg.Done()
+	}))
+	defer server.Close()
+
+	input := NewTestInput()
+	output := NewHTTPOutput(server.URL, &HTTPOutputConfig{SkipVerify: true, WorkersMax: 1})
+
+	plugins := &InOutPlugins{
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
+	}
+	plugins.All = append(plugins.All, input, output)
+
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	for i := 0; i < b.N; i++ {
 		wg.Add(1)

output_kafka.go

@@ -2,11 +2,11 @@ package main
 
 import (
 	"encoding/json"
-	"io"
 	"log"
 	"strings"
 	"time"
 
+	"github.com/buger/goreplay/byteutils"
 	"github.com/buger/goreplay/proto"
 
 	"github.com/Shopify/sarama"
@@ -15,16 +15,16 @@ import (
 
 // KafkaOutput is used for sending payloads to kafka in JSON format.
 type KafkaOutput struct {
-	config   *KafkaConfig
+	config   *OutputKafkaConfig
 	producer sarama.AsyncProducer
 }
 
 // KafkaOutputFrequency in milliseconds
 const KafkaOutputFrequency = 500
 
-// NewKafkaOutput creates instance of kafka producer client.
-func NewKafkaOutput(address string, config *KafkaConfig) io.Writer {
-	c := sarama.NewConfig()
+// NewKafkaOutput creates instance of kafka producer client  with TLS config
+func NewKafkaOutput(address string, config *OutputKafkaConfig, tlsConfig *KafkaTLSConfig) PluginWriter {
+	c := NewKafkaConfig(tlsConfig)
 
 	var producer sarama.AsyncProducer
 
@@ -35,7 +35,7 @@ func NewKafkaOutput(address string, config *KafkaConfig) io.Writer {
 		c.Producer.Compression = sarama.CompressionSnappy
 		c.Producer.Flush.Frequency = KafkaOutputFrequency * time.Millisecond
 
-		brokerList := strings.Split(config.host, ",")
+		brokerList := strings.Split(config.Host, ",")
 
 		var err error
 		producer, err = sarama.NewAsyncProducer(brokerList, c)
@@ -49,10 +49,8 @@ func NewKafkaOutput(address string, config *KafkaConfig) io.Writer {
 		producer: producer,
 	}
 
-	if Settings.verbose {
-		// Start infinite loop for tracking errors for kafka producer.
-		go o.ErrorHandler()
-	}
+	// Start infinite loop for tracking errors for kafka producer.
+	go o.ErrorHandler()
 
 	return o
 }
@@ -60,40 +58,41 @@ func NewKafkaOutput(address string, config *KafkaConfig) io.Writer {
 // ErrorHandler should receive errors
 func (o *KafkaOutput) ErrorHandler() {
 	for err := range o.producer.Errors() {
-		log.Println("Failed to write access log entry:", err)
+		Debug(1, "Failed to write access log entry:", err)
 	}
 }
 
-func (o *KafkaOutput) Write(data []byte) (n int, err error) {
+// PluginWrite writes a message to this plugin
+func (o *KafkaOutput) PluginWrite(msg *Message) (n int, err error) {
 	var message sarama.StringEncoder
 
-	if !o.config.useJSON {
-		message = sarama.StringEncoder(data)
+	if !o.config.UseJSON {
+		message = sarama.StringEncoder(byteutils.SliceToString(msg.Meta) + byteutils.SliceToString(msg.Data))
 	} else {
-		headers := make(map[string]string)
-		proto.ParseHeaders([][]byte{data}, func(header []byte, value []byte) bool {
-			headers[string(header)] = string(value)
-			return true
-		})
+		mimeHeader := proto.ParseHeaders(msg.Data)
+		header := make(map[string]string)
+		for k, v := range mimeHeader {
+			header[k] = strings.Join(v, ", ")
+		}
 
-		meta := payloadMeta(data)
-		req := payloadBody(data)
+		meta := payloadMeta(msg.Meta)
+		req := msg.Data
 
 		kafkaMessage := KafkaMessage{
-			ReqURL:     string(proto.Path(req)),
-			ReqType:    string(meta[0]),
-			ReqID:      string(meta[1]),
-			ReqTs:      string(meta[2]),
-			ReqMethod:  string(proto.Method(req)),
-			ReqBody:    string(proto.Body(req)),
-			ReqHeaders: headers,
+			ReqURL:     byteutils.SliceToString(proto.Path(req)),
+			ReqType:    byteutils.SliceToString(meta[0]),
+			ReqID:      byteutils.SliceToString(meta[1]),
+			ReqTs:      byteutils.SliceToString(meta[2]),
+			ReqMethod:  byteutils.SliceToString(proto.Method(req)),
+			ReqBody:    byteutils.SliceToString(proto.Body(req)),
+			ReqHeaders: header,
 		}
 		jsonMessage, _ := json.Marshal(&kafkaMessage)
-		message = sarama.StringEncoder(jsonMessage)
+		message = sarama.StringEncoder(byteutils.SliceToString(jsonMessage))
 	}
 
 	o.producer.Input() <- &sarama.ProducerMessage{
-		Topic: o.config.topic,
+		Topic: o.config.Topic,
 		Value: message,
 	}
 

output_kafka_test.go

@@ -13,20 +13,20 @@ func TestOutputKafkaRAW(t *testing.T) {
 	producer := mocks.NewAsyncProducer(t, config)
 	producer.ExpectInputAndSucceed()
 
-	output := NewKafkaOutput("", &KafkaConfig{
+	output := NewKafkaOutput("", &OutputKafkaConfig{
 		producer: producer,
-		topic:    "test",
-		useJSON:  false,
-	})
+		Topic:    "test",
+		UseJSON:  false,
+	}, nil)
 
-	output.Write([]byte("1 2 3\nGET / HTTP1.1\r\nHeader: 1\r\n\r\n"))
+	output.PluginWrite(&Message{Meta: []byte("1 2 3\n"), Data: []byte("GET / HTTP1.1\r\nHeader: 1\r\n\r\n")})
 
 	resp := <-producer.Successes()
 
 	data, _ := resp.Value.Encode()
 
 	if string(data) != "1 2 3\nGET / HTTP1.1\r\nHeader: 1\r\n\r\n" {
-		t.Error("Message not properly encoded: ", string(data))
+		t.Errorf("Message not properly encoded: %q", data)
 	}
 }
 
@@ -36,19 +36,19 @@ func TestOutputKafkaJSON(t *testing.T) {
 	producer := mocks.NewAsyncProducer(t, config)
 	producer.ExpectInputAndSucceed()
 
-	output := NewKafkaOutput("", &KafkaConfig{
+	output := NewKafkaOutput("", &OutputKafkaConfig{
 		producer: producer,
-		topic:    "test",
-		useJSON:  true,
-	})
+		Topic:    "test",
+		UseJSON:  true,
+	}, nil)
 
-	output.Write([]byte("1 2 3\nGET / HTTP1.1\r\nHeader: 1\r\n\r\n"))
+	output.PluginWrite(&Message{Meta: []byte("1 2 3\n"), Data: []byte("GET / HTTP1.1\r\nHeader: 1\r\n\r\n")})
 
 	resp := <-producer.Successes()
 
 	data, _ := resp.Value.Encode()
 
-	if string(data) != `{"Req_URL":"/","Req_Type":"1","Req_ID":"2","Req_Ts":"3","Req_Method":"GET","Req_Headers":{"Header":"1"}}` {
+	if string(data) != `{"Req_URL":"","Req_Type":"1","Req_ID":"2","Req_Ts":"3","Req_Method":"GET"}` {
 		t.Error("Message not properly encoded: ", string(data))
 	}
 }

output_null.go

@@ -9,8 +9,9 @@ func NewNullOutput() (o *NullOutput) {
 	return new(NullOutput)
 }
 
-func (o *NullOutput) Write(data []byte) (int, error) {
-	return len(data), nil
+// PluginWrite writes message to this plugin
+func (o *NullOutput) PluginWrite(msg *Message) (int, error) {
+	return len(msg.Data) + len(msg.Meta), nil
 }
 
 func (o *NullOutput) String() string {

output_s3.go

@@ -38,8 +38,8 @@ func NewS3Output(pathTemplate string, config *FileOutputConfig) *S3Output {
 	o.config = config
 	o.config.onClose = o.onBufferUpdate
 
-	if config.bufferPath == "" {
-		config.bufferPath = "/tmp"
+	if config.BufferPath == "" {
+		config.BufferPath = "/tmp"
 	}
 
 	rnd := rand.Int63()
@@ -52,7 +52,7 @@ func NewS3Output(pathTemplate string, config *FileOutputConfig) *S3Output {
 		bufferName += ".gz"
 	}
 
-	bufferPath := filepath.Join(config.bufferPath, bufferName)
+	bufferPath := filepath.Join(config.BufferPath, bufferName)
 
 	o.buffer = NewFileOutput(bufferPath, config)
 	o.connect()
@@ -67,8 +67,9 @@ func (o *S3Output) connect() {
 	}
 }
 
-func (o *S3Output) Write(data []byte) (n int, err error) {
-	return o.buffer.Write(data)
+// PluginWrite writes message to this plugin
+func (o *S3Output) PluginWrite(msg *Message) (n int, err error) {
+	return o.buffer.PluginWrite(msg)
 }
 
 func (o *S3Output) String() string {
@@ -107,22 +108,23 @@ func (o *S3Output) onBufferUpdate(path string) {
 	idx := getFileIndex(path)
 	bucket, key := o.keyPath(idx)
 
-	file, _ := os.Open(path)
-	// reader := bufio.NewReader(file)
+	file, err := os.Open(path)
+	if err != nil {
+		Debug(0, fmt.Sprintf("[S3 Output] Failed to open file %q. err: %q", path, err))
+		return
+	}
+	defer os.Remove(path)
 
-	_, err := svc.PutObject(&s3.PutObjectInput{
+	_, err = svc.PutObject(&s3.PutObjectInput{
 		Body:   file,
 		Bucket: aws.String(bucket),
 		Key:    aws.String(key),
 	})
 	if err != nil {
-		log.Printf("[S3 Output] Failed to upload data to %s/%s, %s\n", bucket, key, err)
-		os.Remove(path)
+		Debug(0, fmt.Sprintf("[S3 Output] Failed to upload data to %q/%q, %q", bucket, key, err))
 		return
 	}
 
-	os.Remove(path)
-
 	if o.closeCh != nil {
 		o.closeCh <- struct{}{}
 	}

output_tcp.go

@@ -1,11 +1,10 @@
 package main
 
 import (
+	"context"
 	"crypto/tls"
 	"fmt"
 	"hash/fnv"
-	"io"
-	"log"
 	"net"
 	"time"
 )
@@ -14,58 +13,59 @@ import (
 // Currently used for internal communication between listener and replay server
 // Can be used for transfering binary payloads like protocol buffers
 type TCPOutput struct {
-	address  string
-	limit    int
-	buf      []chan []byte
-	bufStats *GorStat
-	config   *TCPOutputConfig
+	address     string
+	limit       int
+	buf         []chan *Message
+	bufStats    *GorStat
+	config      *TCPOutputConfig
+	workerIndex uint32
+
+	close bool
 }
 
+// TCPOutputConfig tcp output configuration
 type TCPOutputConfig struct {
-	secure bool
-	sticky bool
+	Secure     bool `json:"output-tcp-secure"`
+	Sticky     bool `json:"output-tcp-sticky"`
+	SkipVerify bool `json:"output-tcp-skip-verify"`
+	Workers    int  `json:"output-tcp-workers"`
 }
 
 // NewTCPOutput constructor for TCPOutput
-// Initialize 10 workers which hold keep-alive connection
-func NewTCPOutput(address string, config *TCPOutputConfig) io.Writer {
+// Initialize X workers which hold keep-alive connection
+func NewTCPOutput(address string, config *TCPOutputConfig) PluginWriter {
 	o := new(TCPOutput)
 
 	o.address = address
 	o.config = config
 
-	if Settings.outputTCPStats {
+	if Settings.OutputTCPStats {
 		o.bufStats = NewGorStat("output_tcp", 5000)
 	}
 
-	if o.config.sticky {
-		// create 10 buffers and send the buffer index to the worker
-		o.buf = make([]chan []byte, 10)
-		for i := 0; i < 10; i++ {
-			o.buf[i] = make(chan []byte, 100)
-			go o.worker(i)
-		}
-	} else {
-		// create 1 buffer and send its index (0) to all workers
-		o.buf = make([]chan []byte, 1)
-		o.buf[0] = make(chan []byte, 1000)
-		for i := 0; i < 10; i++ {
-			go o.worker(0)
-		}
+	// create X buffers and send the buffer index to the worker
+	o.buf = make([]chan *Message, o.config.Workers)
+	for i := 0; i < o.config.Workers; i++ {
+		o.buf[i] = make(chan *Message, 100)
+		go o.worker(i)
 	}
 
 	return o
 }
 
 func (o *TCPOutput) worker(bufferIndex int) {
-	retries := 1
+	retries := 0
 	conn, err := o.connect(o.address)
 	for {
+		if o.close {
+			return
+		}
+
 		if err == nil {
 			break
 		}
 
-		log.Println("Can't connect to aggregator instance, reconnecting in 1 second. Retries:", retries)
+		Debug(1, fmt.Sprintf("Can't connect to aggregator instance, reconnecting in 1 second. Retries:%d", retries))
 		time.Sleep(1 * time.Second)
 
 		conn, err = o.connect(o.address)
@@ -73,19 +73,22 @@ func (o *TCPOutput) worker(bufferIndex int) {
 	}
 
 	if retries > 0 {
-		log.Println("Connected to aggregator instance after ", retries, " retries")
+		Debug(2, fmt.Sprintf("Connected to aggregator instance after %d retries", retries))
 	}
 
 	defer conn.Close()
 
 	for {
-		data := <-o.buf[bufferIndex]
-		conn.Write(data)
-		_, err := conn.Write([]byte(payloadSeparator))
+		msg := <-o.buf[bufferIndex]
+		if _, err = conn.Write(msg.Meta); err == nil {
+			if _, err = conn.Write(msg.Data); err == nil {
+				_, err = conn.Write(payloadSeparatorAsBytes)
+			}
+		}
 
 		if err != nil {
-			log.Println("INFO: TCP output connection closed, reconnecting")
-			o.buf[bufferIndex] <- data
+			Debug(2, "INFO: TCP output connection closed, reconnecting")
+			o.buf[bufferIndex] <- msg
 			go o.worker(bufferIndex)
 			break
 		}
@@ -93,39 +96,45 @@ func (o *TCPOutput) worker(bufferIndex int) {
 }
 
 func (o *TCPOutput) getBufferIndex(data []byte) int {
-	if !o.config.sticky {
-		return 0
+	if !o.config.Sticky {
+		o.workerIndex++
+		return int(o.workerIndex) % o.config.Workers
 	}
 
 	hasher := fnv.New32a()
 	hasher.Write(payloadMeta(data)[1])
-	return int(hasher.Sum32()) % 10
+	return int(hasher.Sum32()) % o.config.Workers
+
 }
 
-func (o *TCPOutput) Write(data []byte) (n int, err error) {
-	if !isOriginPayload(data) {
-		return len(data), nil
+// PluginWrite writes message to this plugin
+func (o *TCPOutput) PluginWrite(msg *Message) (n int, err error) {
+	if !isOriginPayload(msg.Meta) {
+		return len(msg.Data), nil
 	}
 
-	// We have to copy, because sending data in multiple threads
-	newBuf := make([]byte, len(data))
-	copy(newBuf, data)
+	bufferIndex := o.getBufferIndex(msg.Data)
+	o.buf[bufferIndex] <- msg
 
-	bufferIndex := o.getBufferIndex(data)
-	o.buf[bufferIndex] <- newBuf
-
-	if Settings.outputTCPStats {
+	if Settings.OutputTCPStats {
 		o.bufStats.Write(len(o.buf[bufferIndex]))
 	}
 
-	return len(data), nil
+	return len(msg.Data) + len(msg.Meta), nil
 }
 
 func (o *TCPOutput) connect(address string) (conn net.Conn, err error) {
-	if o.config.secure {
-		conn, err = tls.Dial("tcp", address, &tls.Config{})
+	if o.config.Secure {
+		var d tls.Dialer
+		d.Config = &tls.Config{InsecureSkipVerify: o.config.SkipVerify}
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+		conn, err = d.DialContext(ctx, "tcp", address)
 	} else {
-		conn, err = net.Dial("tcp", address)
+		var d net.Dialer
+		ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+		defer cancel()
+		conn, err = d.DialContext(ctx, "tcp", address)
 	}
 
 	return
@@ -134,3 +143,7 @@ func (o *TCPOutput) connect(address string) (conn net.Conn, err error) {
 func (o *TCPOutput) String() string {
 	return fmt.Sprintf("TCP output %s, limit: %d", o.address, o.limit)
 }
+
+func (o *TCPOutput) Close() {
+	o.close = true
+}

output_tcp_test.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"bufio"
-	"io"
 	"log"
 	"net"
 	"sync"
@@ -12,24 +11,22 @@ import (
 
 func TestTCPOutput(t *testing.T) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	listener := startTCP(func(data []byte) {
 		wg.Done()
 	})
 	input := NewTestInput()
-	output := NewTCPOutput(listener.Addr().String(), &TCPOutputConfig{})
+	output := NewTCPOutput(listener.Addr().String(), &TCPOutputConfig{Workers: 10})
 
 	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
 	}
-	plugins.All = append(plugins.All, input, output)
 
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
+	emitter := NewEmitter()
+	go emitter.Start(plugins, Settings.Middleware)
 
-	for i := 0; i < 100; i++ {
+	for i := 0; i < 10; i++ {
 		wg.Add(1)
 		input.EmitGET()
 	}
@@ -48,9 +45,9 @@ func startTCP(cb func([]byte)) net.Listener {
 	go func() {
 		for {
 			conn, _ := listener.Accept()
-			defer conn.Close()
 
-			go func() {
+			go func(conn net.Conn) {
+				defer conn.Close()
 				reader := bufio.NewReader(conn)
 				scanner := bufio.NewScanner(reader)
 				scanner.Split(payloadScanner)
@@ -58,7 +55,7 @@ func startTCP(cb func([]byte)) net.Listener {
 				for scanner.Scan() {
 					cb(scanner.Bytes())
 				}
-			}()
+			}(conn)
 		}
 	}()
 
@@ -67,51 +64,50 @@ func startTCP(cb func([]byte)) net.Listener {
 
 func BenchmarkTCPOutput(b *testing.B) {
 	wg := new(sync.WaitGroup)
-	quit := make(chan int)
 
 	listener := startTCP(func(data []byte) {
 		wg.Done()
 	})
 	input := NewTestInput()
-	output := NewTCPOutput(listener.Addr().String(), &TCPOutputConfig{})
-
-	plugins := &InOutPlugins{
-		Inputs:  []io.Reader{input},
-		Outputs: []io.Writer{output},
-	}
-	plugins.All = append(plugins.All, input, output)
-
-	emitter := NewEmitter(quit)
-	go emitter.Start(plugins, Settings.middleware)
-
-	b.ResetTimer()
+	input.data = make(chan []byte, b.N)
 	for i := 0; i < b.N; i++ {
-		wg.Add(1)
 		input.EmitGET()
 	}
+	wg.Add(b.N)
+	output := NewTCPOutput(listener.Addr().String(), &TCPOutputConfig{Workers: 10})
+
+	plugins := &InOutPlugins{
+		Inputs:  []PluginReader{input},
+		Outputs: []PluginWriter{output},
+	}
+
+	emitter := NewEmitter()
+	// avoid counting above initialization
+	b.ResetTimer()
+	go emitter.Start(plugins, Settings.Middleware)
 
 	wg.Wait()
 	emitter.Close()
 }
 
 func TestStickyDisable(t *testing.T) {
-	tcpOutput := TCPOutput{config: &TCPOutputConfig{sticky: false}}
+	tcpOutput := TCPOutput{config: &TCPOutputConfig{Sticky: false, Workers: 10}}
 
-	for i := 0; i < 1000; i++ {
+	for i := 0; i < 10; i++ {
 		index := tcpOutput.getBufferIndex(getTestBytes())
-		if index != 0 {
-			t.Errorf("Sticky is disable. Got: %d want 0", index)
+		if index != (i+1)%10 {
+			t.Errorf("Sticky is disable. Got: %d want %d", index, (i+1)%10)
 		}
 	}
 }
 
 func TestBufferDistribution(t *testing.T) {
 	numberOfWorkers := 10
-	numberOfMessages := 1000000
+	numberOfMessages := 10000
 	percentDistributionErrorRange := 20
 
 	buffer := make([]int, numberOfWorkers)
-	tcpOutput := TCPOutput{config: &TCPOutputConfig{sticky: true}}
+	tcpOutput := TCPOutput{config: &TCPOutputConfig{Sticky: true, Workers: 10}}
 	for i := 0; i < numberOfMessages; i++ {
 		buffer[tcpOutput.getBufferIndex(getTestBytes())]++
 	}

plugins.go

@@ -1,24 +1,39 @@
 package main
 
 import (
-	"io"
 	"reflect"
 	"strings"
-	"sync"
 )
 
+// Message represents data accross plugins
+type Message struct {
+	Meta []byte // metadata
+	Data []byte // actual data
+}
+
+// PluginReader is an interface for input plugins
+type PluginReader interface {
+	PluginRead() (msg *Message, err error)
+}
+
+// PluginWriter is an interface for output plugins
+type PluginWriter interface {
+	PluginWrite(msg *Message) (n int, err error)
+}
+
+// PluginReadWriter is an interface for plugins that support reading and writing
+type PluginReadWriter interface {
+	PluginReader
+	PluginWriter
+}
+
 // InOutPlugins struct for holding references to plugins
 type InOutPlugins struct {
-	Inputs  []io.Reader
-	Outputs []io.Writer
+	Inputs  []PluginReader
+	Outputs []PluginWriter
 	All     []interface{}
 }
 
-var pluginMu sync.Mutex
-
-// Plugins holds all the plugin objects
-var plugins *InOutPlugins = new(InOutPlugins)
-
 // extractLimitOptions detects if plugin get called with limiter support
 // Returns address and limit
 func extractLimitOptions(options string) (string, string) {
@@ -33,8 +48,8 @@ func extractLimitOptions(options string) (string, string) {
 
 // Automatically detects type of plugin and initialize it
 //
-// See this article if curious about relfect stuff below: http://blog.burntsushi.net/type-parametric-functions-golang
-func registerPlugin(constructor interface{}, options ...interface{}) {
+// See this article if curious about reflect stuff below: http://blog.burntsushi.net/type-parametric-functions-golang
+func (plugins *InOutPlugins) registerPlugin(constructor interface{}, options ...interface{}) {
 	var path, limit string
 	vc := reflect.ValueOf(constructor)
 
@@ -54,108 +69,94 @@ func registerPlugin(constructor interface{}, options ...interface{}) {
 
 	// Calling our constructor with list of given options
 	plugin := vc.Call(vo)[0].Interface()
-	pluginWrapper := plugin
 
 	if limit != "" {
-		pluginWrapper = NewLimiter(plugin, limit)
-	} else {
-		pluginWrapper = plugin
+		plugin = NewLimiter(plugin, limit)
 	}
 
-	_, isR := plugin.(io.Reader)
-	_, isW := plugin.(io.Writer)
-
 	// Some of the output can be Readers as well because return responses
-	if isR && !isW {
-		plugins.Inputs = append(plugins.Inputs, pluginWrapper.(io.Reader))
+	if r, ok := plugin.(PluginReader); ok {
+		plugins.Inputs = append(plugins.Inputs, r)
 	}
 
-	if isW {
-		plugins.Outputs = append(plugins.Outputs, pluginWrapper.(io.Writer))
+	if w, ok := plugin.(PluginWriter); ok {
+		plugins.Outputs = append(plugins.Outputs, w)
 	}
-
 	plugins.All = append(plugins.All, plugin)
+
 }
 
-// InitPlugins specify and initialize all available plugins
-func InitPlugins() *InOutPlugins {
-	pluginMu.Lock()
-	defer pluginMu.Unlock()
+// NewPlugins specify and initialize all available plugins
+func NewPlugins() *InOutPlugins {
+	plugins := new(InOutPlugins)
 
-	for _, options := range Settings.inputDummy {
-		registerPlugin(NewDummyInput, options)
+	for _, options := range Settings.InputDummy {
+		plugins.registerPlugin(NewDummyInput, options)
 	}
 
-	for range Settings.outputDummy {
-		registerPlugin(NewDummyOutput)
+	for range Settings.OutputDummy {
+		plugins.registerPlugin(NewDummyOutput)
 	}
 
-	if Settings.outputStdout {
-		registerPlugin(NewDummyOutput)
+	if Settings.OutputStdout {
+		plugins.registerPlugin(NewDummyOutput)
 	}
 
-	if Settings.outputNull {
-		registerPlugin(NewNullOutput)
+	if Settings.OutputNull {
+		plugins.registerPlugin(NewNullOutput)
 	}
 
-	engine := EnginePcap
-	if Settings.inputRAWEngine == "raw_socket" {
-		engine = EngineRawSocket
-	} else if Settings.inputRAWEngine == "pcap_file" {
-		engine = EnginePcapFile
+	for _, options := range Settings.InputRAW {
+		plugins.registerPlugin(NewRAWInput, options, Settings.RAWInputConfig)
 	}
 
-	for _, options := range Settings.inputRAW {
-		registerPlugin(NewRAWInput, options, engine, Settings.inputRAWTrackResponse, Settings.inputRAWExpire, Settings.inputRAWRealIPHeader, Settings.inputRAWProtocol, Settings.inputRAWBpfFilter, Settings.inputRAWTimestampType, Settings.inputRAWBufferSize)
+	for _, options := range Settings.InputTCP {
+		plugins.registerPlugin(NewTCPInput, options, &Settings.InputTCPConfig)
 	}
 
-	for _, options := range Settings.inputTCP {
-		registerPlugin(NewTCPInput, options, &Settings.inputTCPConfig)
+	for _, options := range Settings.OutputTCP {
+		plugins.registerPlugin(NewTCPOutput, options, &Settings.OutputTCPConfig)
 	}
 
-	for _, options := range Settings.outputTCP {
-		registerPlugin(NewTCPOutput, options, &Settings.outputTCPConfig)
+	for _, options := range Settings.InputFile {
+		plugins.registerPlugin(NewFileInput, options, Settings.InputFileLoop)
 	}
 
-	for _, options := range Settings.inputFile {
-		registerPlugin(NewFileInput, options, Settings.inputFileLoop)
-	}
-
-	for _, path := range Settings.outputFile {
+	for _, path := range Settings.OutputFile {
 		if strings.HasPrefix(path, "s3://") {
-			registerPlugin(NewS3Output, path, &Settings.outputFileConfig)
+			plugins.registerPlugin(NewS3Output, path, &Settings.OutputFileConfig)
 		} else {
-			registerPlugin(NewFileOutput, path, &Settings.outputFileConfig)
+			plugins.registerPlugin(NewFileOutput, path, &Settings.OutputFileConfig)
 		}
 	}
 
-	for _, options := range Settings.inputHTTP {
-		registerPlugin(NewHTTPInput, options)
+	for _, options := range Settings.InputHTTP {
+		plugins.registerPlugin(NewHTTPInput, options)
 	}
 
 	// If we explicitly set Host header http output should not rewrite it
 	// Fix: https://github.com/buger/gor/issues/174
-	for _, header := range Settings.modifierConfig.headers {
+	for _, header := range Settings.ModifierConfig.Headers {
 		if header.Name == "Host" {
-			Settings.outputHTTPConfig.OriginalHost = true
+			Settings.OutputHTTPConfig.OriginalHost = true
 			break
 		}
 	}
 
-	for _, options := range Settings.outputHTTP {
-		registerPlugin(NewHTTPOutput, options, &Settings.outputHTTPConfig)
+	for _, options := range Settings.OutputHTTP {
+		plugins.registerPlugin(NewHTTPOutput, options, &Settings.OutputHTTPConfig)
 	}
 
-	for _, options := range Settings.outputBinary {
-		registerPlugin(NewBinaryOutput, options, &Settings.outputBinaryConfig)
+	for _, options := range Settings.OutputBinary {
+		plugins.registerPlugin(NewBinaryOutput, options, &Settings.OutputBinaryConfig)
 	}
 
-	if Settings.outputKafkaConfig.host != "" && Settings.outputKafkaConfig.topic != "" {
-		registerPlugin(NewKafkaOutput, "", &Settings.outputKafkaConfig)
+	if Settings.OutputKafkaConfig.Host != "" && Settings.OutputKafkaConfig.Topic != "" {
+		plugins.registerPlugin(NewKafkaOutput, "", &Settings.OutputKafkaConfig, &Settings.KafkaTLSConfig)
 	}
 
-	if Settings.inputKafkaConfig.host != "" && Settings.inputKafkaConfig.topic != "" {
-		registerPlugin(NewKafkaInput, "", &Settings.inputKafkaConfig)
+	if Settings.InputKafkaConfig.Host != "" && Settings.InputKafkaConfig.Topic != "" {
+		plugins.registerPlugin(NewKafkaInput, "", &Settings.InputKafkaConfig, &Settings.KafkaTLSConfig)
 	}
 
 	return plugins

plugins_test.go

@@ -5,15 +5,15 @@ import (
 )
 
 func TestPluginsRegistration(t *testing.T) {
-	Settings.inputDummy = MultiOption{"[]"}
-	Settings.outputDummy = MultiOption{"[]"}
-	Settings.outputHTTP = MultiOption{"www.example.com|10"}
-	Settings.inputFile = MultiOption{"/dev/null"}
+	Settings.InputDummy = MultiOption{"[]"}
+	Settings.OutputDummy = MultiOption{"[]"}
+	Settings.OutputHTTP = MultiOption{"www.example.com|10"}
+	Settings.InputFile = MultiOption{"/dev/null"}
 
-	plugins := InitPlugins()
+	plugins := NewPlugins()
 
-	if len(plugins.Inputs) != 2 {
-		t.Errorf("Should be 2 inputs %d", len(plugins.Inputs))
+	if len(plugins.Inputs) != 3 {
+		t.Errorf("Should be 3 inputs got %d", len(plugins.Inputs))
 	}
 
 	if _, ok := plugins.Inputs[0].(*DummyInput); !ok {

proto/fuzz.go

@@ -4,9 +4,7 @@ package proto
 
 func Fuzz(data []byte) int {
 
-	ParseHeaders([][]byte{data}, func(header []byte, value []byte) bool {
-		return true
-	})
+	ParseHeaders(data)
 
 	return 1
 }

proto/proto.go

@@ -17,216 +17,130 @@ Example of HTTP payload for future references, new line symbols escaped:
 package proto
 
 import (
+	"bufio"
 	"bytes"
+	"net/http"
+	"net/textproto"
+	"strings"
 
 	"github.com/buger/goreplay/byteutils"
 )
 
-// In HTTP newline defined by 2 bytes (for both windows and *nix support)
-var CLRF = []byte("\r\n")
+// CRLF In HTTP newline defined by 2 bytes (for both windows and *nix support)
+var CRLF = []byte("\r\n")
 
-// New line acts as separator: end of Headers or Body (in some cases)
+// EmptyLine acts as separator: end of Headers or Body (in some cases)
 var EmptyLine = []byte("\r\n\r\n")
 
-// Separator for Header line. Header looks like: `HeaderName: value`
+// HeaderDelim Separator for Header line. Header looks like: `HeaderName: value`
 var HeaderDelim = []byte(": ")
 
 // MIMEHeadersEndPos finds end of the Headers section, which should end with empty line.
 func MIMEHeadersEndPos(payload []byte) int {
-	return bytes.Index(payload, EmptyLine) + 4
+	pos := bytes.Index(payload, EmptyLine)
+	if pos < 0 {
+		return -1
+	}
+	return pos + 4
 }
 
 // MIMEHeadersStartPos finds start of Headers section
 // It just finds position of second line (first contains location and method).
 func MIMEHeadersStartPos(payload []byte) int {
-	return bytes.Index(payload, CLRF) + 2 // Find first line end
-}
-
-func headerIndex(payload []byte, name []byte) int {
-	i := 0
-	for {
-		// we need enough space for at least '\n' and the header name
-		if i >= (len(payload) - len(name) - 1) {
-			return -1
-		}
-
-		if payload[i] == '\n' {
-			i++
-			if bytes.EqualFold(name, payload[i:i+len(name)]) {
-				return i
-			}
-		}
-		i++
-
+	pos := bytes.Index(payload, CRLF)
+	if pos < 0 {
+		return -1
 	}
-	return -1
+	return pos + 2 // Find first line end
 }
 
 // header return value and positions of header/value start/end.
 // If not found, value will be blank, and headerStart will be -1
 // Do not support multi-line headers.
 func header(payload []byte, name []byte) (value []byte, headerStart, headerEnd, valueStart, valueEnd int) {
-	headerStart = headerIndex(payload, name)
+	if HasTitle(payload) {
+		headerStart = MIMEHeadersStartPos(payload)
+		if headerStart < 0 {
+			return
+		}
+	} else {
+		headerStart = 0
+	}
 
-	if headerStart == -1 {
+	var colonIndex int
+	for headerStart < len(payload) {
+		headerEnd = bytes.IndexByte(payload[headerStart:], '\n')
+		if headerEnd == -1 {
+			break
+		}
+		headerEnd += headerStart
+		colonIndex = bytes.IndexByte(payload[headerStart:headerEnd], ':')
+		if colonIndex == -1 {
+			break
+		}
+		colonIndex += headerStart
+		if bytes.EqualFold(payload[headerStart:colonIndex], name) {
+			valueStart = colonIndex + 1
+			valueEnd = headerEnd - 2
+			break
+		}
+		headerStart = headerEnd + 1 // move to the next header
+	}
+	if valueStart == 0 {
+		headerStart = -1
+		headerEnd = -1
+		valueEnd = -1
+		valueStart = -1
 		return
 	}
 
-	valueStart = headerStart + len(name) + 1 // Skip ":" after header name
-	headerEnd = valueStart + bytes.IndexByte(payload[valueStart:], '\n')
-
-	for valueStart < headerEnd { // Ignore empty space after ':'
-		if payload[valueStart] == ' ' {
+	// ignore empty space after ':'
+	for valueStart < valueEnd {
+		if payload[valueStart] < 0x21 {
 			valueStart++
 		} else {
 			break
 		}
 	}
 
-	valueEnd = valueStart + bytes.IndexByte(payload[valueStart:], '\n')
-
-	if payload[headerEnd-1] == '\r' {
-		valueEnd--
-	}
-
 	// ignore empty space at end of header value
-	for valueStart < valueEnd {
-		if payload[valueEnd-1] == ' ' {
+	for valueEnd > valueStart {
+		if payload[valueEnd] < 0x21 {
 			valueEnd--
 		} else {
 			break
 		}
 	}
-	value = payload[valueStart:valueEnd]
+	value = payload[valueStart : valueEnd+1]
 
 	return
 }
 
-// Works only with ASCII
-func HeadersEqual(h1 []byte, h2 []byte) bool {
-	if len(h1) != len(h2) {
-		return false
-	}
-
-	for i, c1 := range h1 {
-		c2 := h2[i]
-
-		switch int(c1) - int(c2) {
-		case 0, 32, -32:
-		default:
-			return false
+// ParseHeaders Parsing headers from the payload
+func ParseHeaders(p []byte) textproto.MIMEHeader {
+	// trimming off the title of the request
+	if HasTitle(p) {
+		headerStart := MIMEHeadersStartPos(p)
+		if headerStart > len(p)-1 {
+			return nil
 		}
+		p = p[headerStart:]
 	}
-
-	return true
+	headerEnd := MIMEHeadersEndPos(p)
+	if headerEnd > 1 {
+		p = p[:headerEnd]
+	}
+	return GetHeaders(p)
 }
 
-// Parsing headers from multiple payloads
-func ParseHeaders(payloads [][]byte, cb func(header []byte, value []byte) bool) {
-	hS := [2]int{0, 0}   // header start
-	hE := [2]int{-1, -1} // header end
-	vS := [2]int{-1, -1} // value start
-	vE := [2]int{-1, -1} // value end
-
-	i := 0
-	pIdx := 0
-	lineBreaks := 0
-	newLineBreak := true
-
-	for {
-		if len(payloads)-1 < pIdx {
-			break
-		}
-
-		p := payloads[pIdx]
-
-		if len(p)-1 < i {
-			pIdx++
-			i = 0
-			continue
-		}
-
-		switch p[i] {
-		case '\r', '\n':
-			newLineBreak = true
-			lineBreaks++
-
-			// End of headers
-			if lineBreaks == 4 {
-				return
-			}
-
-			if lineBreaks > 1 {
-				break
-			}
-
-			vE = [2]int{pIdx, i}
-
-			if vS[1] != -1 && vE[1] != -1 &&
-				hS[1] != -1 && hE[1] != -1 {
-
-				var header, value []byte
-
-				phS, phE, pvS, pvE := payloads[hS[0]], payloads[hE[0]], payloads[vS[0]], payloads[vE[0]]
-
-				// If in same payload
-				if hS[0] == hE[0] {
-					header = phS[hS[1]:hE[1]]
-				} else {
-					header = make([]byte, len(phS)-hS[1]+hE[1])
-					copy(header, phS[hS[1]:])
-					copy(header[len(phS)-hS[1]:], phE[:hE[1]])
-				}
-
-				if vS[0] == vE[0] {
-					value = pvS[vS[1]:vE[1]]
-				} else {
-					value = make([]byte, len(pvS)-vS[1]+vE[1])
-					copy(value, pvS[vS[1]:])
-					copy(value[len(pvS)-vS[1]:], pvE[:vE[1]])
-				}
-
-				if !cb(header, value) {
-					return
-				}
-			}
-
-			// Header found, reset values
-			vS = [2]int{-1, -1}
-			vE = [2]int{-1, -1}
-			hS = [2]int{-1, -1}
-			hE = [2]int{-1, -1}
-		case ':':
-			if newLineBreak {
-				hE = [2]int{pIdx, i}
-				newLineBreak = false
-			}
-			lineBreaks = 0
-		default:
-			lineBreaks = 0
-
-			if hS[1] == -1 {
-				hS = [2]int{pIdx, i}
-				hE = [2]int{-1, -1}
-			} else {
-				if hE[1] == -1 {
-					break
-				}
-
-				if vS[1] == -1 {
-					if p[i] == ' ' {
-						break
-					}
-
-					vS = [2]int{pIdx, i}
-				}
-			}
-		}
-
-		i++
+// GetHeaders returns mime headers from the payload
+func GetHeaders(p []byte) textproto.MIMEHeader {
+	reader := textproto.NewReader(bufio.NewReader(bytes.NewReader(p)))
+	mime, err := reader.ReadMIMEHeader()
+	if err != nil {
+		return nil
 	}
-
-	return
+	return mime
 }
 
 // Header returns header value, if header not found, value will be blank
@@ -243,7 +157,7 @@ func SetHeader(payload, name, value []byte) []byte {
 
 	if hs != -1 {
 		// If header found we just replace its value
-		return byteutils.Replace(payload, vs, ve, value)
+		return byteutils.Replace(payload, vs, ve+1, value)
 	}
 
 	return AddHeader(payload, name, value)
@@ -252,67 +166,54 @@ func SetHeader(payload, name, value []byte) []byte {
 // AddHeader takes http payload and appends new header to the start of headers section
 // Returns modified request payload
 func AddHeader(payload, name, value []byte) []byte {
+	mimeStart := MIMEHeadersStartPos(payload)
+	if mimeStart < 1 {
+		return payload
+	}
 	header := make([]byte, len(name)+2+len(value)+2)
 	copy(header[0:], name)
 	copy(header[len(name):], HeaderDelim)
 	copy(header[len(name)+2:], value)
-	copy(header[len(header)-2:], CLRF)
-
-	mimeStart := MIMEHeadersStartPos(payload)
+	copy(header[len(header)-2:], CRLF)
 
 	return byteutils.Insert(payload, mimeStart, header)
 }
 
-// DelHeader takes http payload and removes header name from headers section
+// DeleteHeader takes http payload and removes header name from headers section
 // Returns modified request payload
 func DeleteHeader(payload, name []byte) []byte {
 	_, hs, he, _, _ := header(payload, name)
 	if hs != -1 {
-		newHeader := make([]byte, len(payload)-(he-hs)-1)
-		copy(newHeader[:hs], payload[:hs])
-		copy(newHeader[hs:], payload[he+1:])
-		return newHeader
+		return byteutils.Cut(payload, hs, he+1)
 	}
 	return payload
 }
 
 // Body returns request/response body
 func Body(payload []byte) []byte {
-	// 4 -> len(EMPTY_LINE)
-	if len(payload) < 4 {
-		return []byte{}
+	pos := MIMEHeadersEndPos(payload)
+	if pos == -1 || len(payload) <= pos {
+		return nil
 	}
-
-	return payload[MIMEHeadersEndPos(payload):]
+	return payload[pos:]
 }
 
 // Path takes payload and retuns request path: Split(firstLine, ' ')[1]
 func Path(payload []byte) []byte {
+	if !HasRequestTitle(payload) {
+		return nil
+	}
 	start := bytes.IndexByte(payload, ' ') + 1
-	eol := bytes.IndexByte(payload[start:], '\r')
 	end := bytes.IndexByte(payload[start:], ' ')
 
-	if eol > 0 {
-		if end == -1 || eol < end {
-			return payload[start : start+eol]
-		}
-	} else { // support for legacy clients
-		eol = bytes.IndexByte(payload[start:], '\n')
-
-		if eol > 0 && (end == -1 || eol < end) {
-			return payload[start : start+eol]
-		}
-	}
-
-	if end < 0 {
-		return payload[start:]
-	}
-
 	return payload[start : start+end]
 }
 
 // SetPath takes payload, sets new path and returns modified payload
 func SetPath(payload, path []byte) []byte {
+	if !HasTitle(payload) {
+		return nil
+	}
 	start := bytes.IndexByte(payload, ' ') + 1
 	end := bytes.IndexByte(payload[start:], ' ')
 
@@ -323,21 +224,23 @@ func SetPath(payload, path []byte) []byte {
 func PathParam(payload, name []byte) (value []byte, valueStart, valueEnd int) {
 	path := Path(payload)
 
-	if paramStart := bytes.Index(path, append(name, '=')); paramStart != -1 {
-		valueStart := paramStart + len(name) + 1
-		paramEnd := bytes.IndexByte(path[valueStart:], '&')
-
-		// Param can end with '&' (another param), or end of line
-		if paramEnd == -1 { // It is final param
-			paramEnd = len(path)
-		} else {
-			paramEnd += valueStart
+	paramStart := -1
+	if paramStart = bytes.Index(path, append([]byte{'&'}, append(name, '=')...)); paramStart == -1 {
+		if paramStart = bytes.Index(path, append([]byte{'?'}, append(name, '=')...)); paramStart == -1 {
+			return []byte(""), -1, -1
 		}
-
-		return path[valueStart:paramEnd], valueStart, paramEnd
 	}
 
-	return []byte(""), -1, -1
+	valueStart = paramStart + len(name) + 2
+	paramEnd := bytes.IndexByte(path[valueStart:], '&')
+
+	// Param can end with '&' (another param), or end of line
+	if paramEnd == -1 { // It is final param
+		paramEnd = len(path)
+	} else {
+		paramEnd += valueStart
+	}
+	return path[valueStart:paramEnd], valueStart, paramEnd
 }
 
 // SetPathParam takes payload and updates path Query attribute
@@ -401,31 +304,294 @@ func SetHost(payload, url, host []byte) []byte {
 // Method returns HTTP method
 func Method(payload []byte) []byte {
 	end := bytes.IndexByte(payload, ' ')
+	if end == -1 {
+		return nil
+	}
 
 	return payload[:end]
 }
 
 // Status returns response status.
-// It happend to be in same position as request payload path
+// It happens to be in same position as request payload path
 func Status(payload []byte) []byte {
-	return Path(payload)
+	if !HasResponseTitle(payload) {
+		return nil
+	}
+	start := bytes.IndexByte(payload, ' ') + 1
+	// status code are in range 100-600
+	return payload[start : start+3]
 }
 
-var httpMethods []string = []string{
-	"GET ", "OPTI", "HEAD", "POST", "PUT ", "DELE", "TRAC", "CONN", "PATC" /* custom methods */, "BAN ", "PURG", "PROP", "MKCO", "COPY", "MOVE", "LOCK", "UNLO",
+// Methods holds the http methods ordered in ascending order
+var Methods = [...]string{
+	http.MethodConnect, http.MethodDelete, http.MethodGet,
+	http.MethodHead, http.MethodOptions, http.MethodPatch,
+	http.MethodPost, http.MethodPut, http.MethodTrace,
 }
 
-func IsHTTPPayload(payload []byte) bool {
-	if len(payload) < 4 {
+const (
+	//MinRequestCount GET / HTTP/1.1\r\n
+	MinRequestCount = 16
+	// MinResponseCount HTTP/1.1 200\r\n
+	MinResponseCount = 14
+	// VersionLen HTTP/1.1
+	VersionLen = 8
+)
+
+// HasResponseTitle reports whether this payload has an HTTP/1 response title
+func HasResponseTitle(payload []byte) bool {
+	s := byteutils.SliceToString(payload)
+	if len(s) < MinResponseCount {
+		return false
+	}
+	titleLen := bytes.Index(payload, CRLF)
+	if titleLen == -1 {
+		return false
+	}
+	major, minor, ok := http.ParseHTTPVersion(s[0:VersionLen])
+	if !(ok && major == 1 && (minor == 0 || minor == 1)) {
+		return false
+	}
+	if s[VersionLen] != ' ' {
+		return false
+	}
+	status, ok := atoI(payload[VersionLen+1:VersionLen+4], 10)
+	if !ok {
+		return false
+	}
+	// only validate status codes mentioned in rfc2616.
+	if http.StatusText(status) == "" {
+		return false
+	}
+	// handle cases from #875
+	return payload[VersionLen+4] == ' ' || payload[VersionLen+4] == '\r'
+}
+
+// HasRequestTitle reports whether this payload has an HTTP/1 request title
+func HasRequestTitle(payload []byte) bool {
+	s := byteutils.SliceToString(payload)
+	if len(s) < MinRequestCount {
+		return false
+	}
+	titleLen := bytes.Index(payload, CRLF)
+	if titleLen == -1 {
+		return false
+	}
+	if strings.Count(s[:titleLen], " ") != 2 {
+		return false
+	}
+	method := string(Method(payload))
+	var methodFound bool
+	for _, m := range Methods {
+		if methodFound = method == m; methodFound {
+			break
+		}
+	}
+	if !methodFound {
+		return false
+	}
+	path := strings.Index(s[len(method)+1:], " ")
+	if path == -1 {
+		return false
+	}
+	major, minor, ok := http.ParseHTTPVersion(s[path+len(method)+2 : titleLen])
+	return ok && major == 1 && (minor == 0 || minor == 1)
+}
+
+// HasTitle reports if this payload has an http/1 title
+func HasTitle(payload []byte) bool {
+	return HasRequestTitle(payload) || HasResponseTitle(payload)
+}
+
+// CheckChunked checks HTTP/1 chunked data integrity(https://tools.ietf.org/html/rfc7230#section-4.1)
+// and returns the length of total valid scanned chunks(including chunk size, extensions and CRLFs) and
+// full is true if all chunks was scanned.
+func CheckChunked(bufs ...[]byte) (chunkEnd int, full bool) {
+	var buf []byte
+	if len(bufs) > 0 {
+		buf = bufs[0]
+	}
+	for chunkEnd < len(buf) {
+		sz := bytes.IndexByte(buf[chunkEnd:], '\r')
+		if sz < 1 {
+			break
+		}
+		// don't parse chunk extensions https://github.com/golang/go/issues/13135.
+		// chunks extensions are no longer a thing, but we do check if the byte
+		// following the parsed hex number is ';'
+		sz += chunkEnd
+		chkLen, ok := atoI(buf[chunkEnd:sz], 16)
+		if !ok && bytes.IndexByte(buf[chunkEnd:sz], ';') < 1 {
+			break
+		}
+		sz++ // + '\n'
+		// total length = SIZE + CRLF + OCTETS + CRLF
+		allChunk := sz + chkLen + 2
+		if allChunk >= len(buf) ||
+			buf[sz]&buf[allChunk] != '\n' ||
+			buf[allChunk-1] != '\r' {
+			break
+		}
+		chunkEnd = allChunk + 1
+		if chkLen == 0 {
+			full = true
+			break
+		}
+	}
+	return
+}
+
+// ProtocolStateSetter is an interface used to provide protocol state for future use
+type ProtocolStateSetter interface {
+	SetProtocolState(interface{})
+	ProtocolState() interface{}
+}
+
+type httpProto struct {
+	body         int // body index
+	headerStart  int
+	headerParsed bool // we checked necessary headers
+	hasFullBody  bool // all chunks has been parsed
+	isChunked    bool // Transfer-Encoding: chunked
+	bodyLen      int  // Content-Length's value
+	hasTrailer   bool // Trailer header?
+}
+
+// HasFullPayload checks if this message has full or valid payloads and returns true.
+// Message param is optional but recommended on cases where 'data' is storing
+// partial-to-full stream of bytes(packets).
+func HasFullPayload(m ProtocolStateSetter, payloads ...[]byte) bool {
+	var state *httpProto
+	if m != nil {
+		state, _ = m.ProtocolState().(*httpProto)
+	}
+	if state == nil {
+		state = new(httpProto)
+		if m != nil {
+			m.SetProtocolState(state)
+		}
+	}
+	if state.headerStart < 1 {
+		for _, data := range payloads {
+			state.headerStart = MIMEHeadersStartPos(data)
+			if state.headerStart < 0 {
+				return false
+			} else {
+				break
+			}
+		}
+	}
+
+	if state.body < 1 {
+		var pos int
+		for _, data := range payloads {
+			endPos := MIMEHeadersEndPos(data)
+			if endPos < 0 {
+				pos += len(data)
+			} else {
+				pos += endPos
+			}
+
+			if endPos > 0 {
+				state.body = pos
+				break
+			}
+		}
+	}
+	if !state.headerParsed {
+		var pos int
+		for _, data := range payloads {
+			chunked := Header(data, []byte("Transfer-Encoding"))
+
+			if len(chunked) > 0 && bytes.Index(data, []byte("chunked")) > 0 {
+				state.isChunked = true
+				// trailers are generally not allowed in non-chunks body
+				state.hasTrailer = len(Header(data, []byte("Trailer"))) > 0
+			} else {
+				contentLen := Header(data, []byte("Content-Length"))
+				state.bodyLen, _ = atoI(contentLen, 10)
+			}
+
+			pos += len(data)
+
+			if state.bodyLen > 0 || pos >= state.body {
+				state.headerParsed = true
+				break
+			}
+		}
+	}
+
+	bodyLen := 0
+	for _, data := range payloads {
+		bodyLen += len(data)
+	}
+	bodyLen -= state.body
+
+	if state.isChunked {
+		// check chunks
+		if bodyLen < 1 {
+			return false
+		}
+
+		// check trailer headers
+		if state.hasTrailer {
+			if bytes.HasSuffix(payloads[len(payloads)-1], []byte("\r\n\r\n")) {
+				return true
+			}
+		} else {
+			if bytes.HasSuffix(payloads[len(payloads)-1], []byte("0\r\n\r\n")) {
+				state.hasFullBody = true
+				return true
+			}
+		}
+
 		return false
 	}
 
-	method := string(payload[0:4])
+	// check for content-length header
+	return state.bodyLen == bodyLen
+}
 
-	for _, m := range httpMethods {
-		if method == m {
-			return true
+// this works with positive integers
+func atoI(s []byte, base int) (num int, ok bool) {
+	var v int
+	ok = true
+	for i := 0; i < len(s); i++ {
+		if s[i] > 127 {
+			ok = false
+			break
 		}
+		v = int(hexTable[s[i]])
+		if v >= base || (v == 0 && s[i] != '0') {
+			ok = false
+			break
+		}
+		num = (num * base) + v
 	}
-	return false
+	return
+}
+
+var hexTable = [128]byte{
+	'0': 0,
+	'1': 1,
+	'2': 2,
+	'3': 3,
+	'4': 4,
+	'5': 5,
+	'6': 6,
+	'7': 7,
+	'8': 8,
+	'9': 9,
+	'A': 10,
+	'a': 10,
+	'B': 11,
+	'b': 11,
+	'C': 12,
+	'c': 12,
+	'D': 13,
+	'd': 13,
+	'E': 14,
+	'e': 14,
+	'F': 15,
+	'f': 15,
 }

proto/proto_test.go

@@ -2,6 +2,7 @@ package proto
 
 import (
 	"bytes"
+	"net/textproto"
 	"reflect"
 	"testing"
 )
@@ -38,13 +39,6 @@ func TestHeader(t *testing.T) {
 		t.Error("Should return empty value")
 	}
 
-	// Wrong delimeter
-	payload = []byte("GET /p HTTP/1.1\r\nCookie: 123\nHost: www.w3.org\r\n\r\n")
-
-	if val = Header(payload, []byte("Cookie")); !bytes.Equal(val, []byte("123")) {
-		t.Error("Should handle wrong header delimeter")
-	}
-
 	// Header not found
 	if _, headerStart, _, _, _ = header(payload, []byte("Not-Found")); headerStart != -1 {
 		t.Error("Should not found header")
@@ -103,6 +97,10 @@ func TestSetHeader(t *testing.T) {
 	if payload = SetHeader(payload, []byte("User-Agent"), []byte("Gor")); !bytes.Equal(payload, payloadAfter) {
 		t.Error("Should add header if not found", string(payload))
 	}
+	invalidPayload := []byte("POST /post HTTP/1.1")
+	if invalidPayload = SetHeader(invalidPayload, []byte("User-Agent"), []byte("Gor")); !bytes.Equal(invalidPayload, []byte("POST /post HTTP/1.1")) {
+		t.Error("Should not modify payload if request is invalid", string(payload))
+	}
 }
 
 func TestDeleteHeader(t *testing.T) {
@@ -127,22 +125,35 @@ func TestDeleteHeader(t *testing.T) {
 func TestParseHeaders(t *testing.T) {
 	payload := [][]byte{[]byte("POST /post HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.or"), []byte("g\r\nUser-Ag"), []byte("ent:Chrome\r\n\r\n"), []byte("Fake-Header: asda")}
 
-	headers := make(map[string]string)
+	headers := ParseHeaders(bytes.Join(payload, nil))
 
-	ParseHeaders(payload, func(header []byte, value []byte) bool {
-		headers[string(header)] = string(value)
-		return true
-	})
-
-	expected := map[string]string{
-		"Content-Length": "7",
-		"Host":           "www.w3.org",
-		"User-Agent":     "Chrome",
+	expected := textproto.MIMEHeader{
+		"Content-Length": []string{"7"},
+		"Host":           []string{"www.w3.org"},
+		"User-Agent":     []string{"Chrome"},
 	}
 
 	if !reflect.DeepEqual(headers, expected) {
 		t.Error("Headers do not properly parsed", headers)
 	}
+
+	// Response with Reason phrase
+	payload = [][]byte{[]byte("HTTP/1.1 200 OK\r\nContent-Length: 7\r\nHost: www.w3.org\r\nUser-Agent:Chrome\r\n\r\nbody")}
+
+	headers = ParseHeaders(bytes.Join(payload, nil))
+
+	if !reflect.DeepEqual(headers, expected) {
+		t.Error("Headers do not properly parsed", headers)
+	}
+
+	// Response without Reason phrase
+	payload = [][]byte{[]byte("HTTP/1.1 200\r\nContent-Length: 7\r\nHost: www.w3.org\r\nUser-Agent:Chrome\r\n\r\nbody")}
+
+	headers = ParseHeaders(bytes.Join(payload, nil))
+
+	if !reflect.DeepEqual(headers, expected) {
+		t.Error("Headers do not properly parsed", headers)
+	}
 }
 
 // See https://github.com/dvyukov/go-fuzz and fuzz.go
@@ -152,9 +163,7 @@ func TestFuzzCrashers(t *testing.T) {
 	}
 
 	for _, f := range crashers {
-		ParseHeaders([][]byte{[]byte(f)}, func(header []byte, value []byte) bool {
-			return true
-		})
+		ParseHeaders([]byte(f))
 	}
 }
 
@@ -163,18 +172,13 @@ func TestParseHeadersWithComplexUserAgent(t *testing.T) {
 	// Parser should wait for \r\n
 	payload := [][]byte{[]byte("POST /post HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.or"), []byte("g\r\nUser-Ag"), []byte("ent:Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko\r\n\r\n"), []byte("Fake-Header: asda")}
 
-	headers := make(map[string]string)
-
-	ParseHeaders(payload, func(header []byte, value []byte) bool {
-		headers[string(header)] = string(value)
-		return true
-	})
+	headers := ParseHeaders(bytes.Join(payload, nil))
 
 	expected := map[string]string{
 		"User-Agent": "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko",
 	}
 
-	if expected["User-Agent"] != headers["User-Agent"] {
+	if expected["User-Agent"] != headers["User-Agent"][0] {
 		t.Errorf("Header 'User-Agent' expected '%s' and parsed: '%s'", expected["User-Agent"], headers["User-Agent"])
 	}
 }
@@ -184,12 +188,7 @@ func TestParseHeadersWithOrigin(t *testing.T) {
 	// Parser should wait for \r\n
 	payload := [][]byte{[]byte("POST /post HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.or"), []byte("g\r\nReferrer: http://127.0.0.1:3000\r\nOrigi"), []byte("n: https://www.example.com\r\nUser-Ag"), []byte("ent:Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko\r\n\r\n"), []byte("in:https://www.example.com\r\n\r\n"), []byte("Fake-Header: asda")}
 
-	headers := make(map[string]string)
-
-	ParseHeaders(payload, func(header []byte, value []byte) bool {
-		headers[string(header)] = string(value)
-		return true
-	})
+	headers := ParseHeaders(bytes.Join(payload, nil))
 
 	expected := map[string]string{
 		"Origin":     "https://www.example.com",
@@ -197,38 +196,19 @@ func TestParseHeadersWithOrigin(t *testing.T) {
 		"Referrer":   "http://127.0.0.1:3000",
 	}
 
-	if expected["Referrer"] != headers["Referrer"] {
+	if expected["Referrer"] != headers["Referrer"][0] {
 		t.Errorf("Header 'Referrer' expected '%s' and parsed: '%s'", expected["Referrer"], headers["Referrer"])
 	}
 
-	if expected["Origin"] != headers["Origin"] {
+	if expected["Origin"] != headers["Origin"][0] {
 		t.Errorf("Header 'Origin' expected '%s' and parsed: '%s'", expected["Origin"], headers["Origin"])
 	}
 
-	if expected["User-Agent"] != headers["User-Agent"] {
+	if expected["User-Agent"] != headers["User-Agent"][0] {
 		t.Errorf("Header 'User-Agent' expected '%s' and parsed: '%s'", expected["User-Agent"], headers["User-Agent"])
 	}
 }
 
-func TestHeaderEquals(t *testing.T) {
-	tests := []struct {
-		h1     string
-		h2     string
-		equals bool
-	}{
-		{"Content-Length", "content-length", true},
-		{"content-length", "Content-Length", true},
-		{"content-Pength", "Content-Length", false},
-		{"Host", "Content-Length", false},
-	}
-
-	for _, tc := range tests {
-		if HeadersEqual([]byte(tc.h1), []byte(tc.h2)) != tc.equals {
-			t.Error(tc)
-		}
-	}
-}
-
 func TestPath(t *testing.T) {
 	var path, payload []byte
 
@@ -240,20 +220,39 @@ func TestPath(t *testing.T) {
 
 	payload = []byte("GET /get\r\n\r\nHost: www.w3.org\r\n\r\n")
 
-	if path = Path(payload); !bytes.Equal(path, []byte("/get")) {
-		t.Error("Should find path", string(path))
+	if path = Path(payload); !bytes.Equal(path, nil) {
+		t.Error("1Should not find path", string(path))
 	}
 
 	payload = []byte("GET /get\n")
 
-	if path = Path(payload); !bytes.Equal(path, []byte("/get")) {
-		t.Error("Should find path", string(path))
+	if path = Path(payload); !bytes.Equal(path, nil) {
+		t.Error("2Should not find path", string(path))
 	}
 
 	payload = []byte("GET /get")
 
-	if path = Path(payload); !bytes.Equal(path, []byte("/get")) {
-		t.Error("Should find path", string(path))
+	if path = Path(payload); !bytes.Equal(path, nil) {
+		t.Error("3Should not find path", string(path))
+	}
+}
+
+func TestStatus(t *testing.T) {
+	var status, payload []byte
+
+	payload = []byte("HTTP/1.1 200 OK\r\n")
+	if status = Status(payload); !bytes.Equal(status, []byte("200")) {
+		t.Error("Should find status 200 but:", string(status))
+	}
+
+	payload = []byte("HTTP/1.1 200\r\n")
+	if status = Status(payload); !bytes.Equal(status, []byte("200")) {
+		t.Error("1Should find status 200 but:", string(status))
+	}
+
+	payload = []byte("HTTP/1.1 404 Not Found\r\n")
+	if status = Status(payload); !bytes.Equal(status, []byte("404")) {
+		t.Error("2Should find status 404 but:", string(status))
 	}
 }
 
@@ -266,12 +265,13 @@ func TestSetPath(t *testing.T) {
 	if payload = SetPath(payload, []byte("/new_path")); !bytes.Equal(payload, payloadAfter) {
 		t.Error("Should replace path", string(payload))
 	}
+
 }
 
 func TestPathParam(t *testing.T) {
 	var payload []byte
 
-	payload = []byte("POST /post?param=test&user_id=1 HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.org\r\n\r\na=1&b=2")
+	payload = []byte("POST /post?param=test&user_id=1&d_type=1&type=2&d_type=3 HTTP/1.1\r\nContent-Length: 7\r\nHost: www.w3.org\r\n\r\na=1&b=2")
 
 	if val, _, _ := PathParam(payload, []byte("param")); !bytes.Equal(val, []byte("test")) {
 		t.Error("Should detect attribute", string(val))
@@ -280,6 +280,15 @@ func TestPathParam(t *testing.T) {
 	if val, _, _ := PathParam(payload, []byte("user_id")); !bytes.Equal(val, []byte("1")) {
 		t.Error("Should detect attribute", string(val))
 	}
+
+	if val, _, _ := PathParam(payload, []byte("type")); !bytes.Equal(val, []byte("2")) {
+		t.Error("Should detect attribute", string(val))
+	}
+
+	if val, _, _ := PathParam(payload, []byte("d_type")); !bytes.Equal(val, []byte("1")) {
+		// this function is not designed for cases with duplicate param keys
+		t.Error("Should detect attribute", string(val))
+	}
 }
 
 func TestSetPathParam(t *testing.T) {
@@ -323,4 +332,160 @@ func TestSetHostHTTP10(t *testing.T) {
 	if payload = SetHost(payload, []byte("http://new.com"), []byte("new.com")); !bytes.Equal(payload, payloadAfter) {
 		t.Error("Should replace host", string(payload))
 	}
+
+	payload = []byte("POST /post HTTP/1.0\r\nContent-Length: 7\r\nHost: example.com\r\n\r\na=1&b=2")
+	payloadAfter = []byte("POST /post HTTP/1.0\r\nContent-Length: 7\r\nHost: new.com\r\n\r\na=1&b=2")
+
+	if payload = SetHost(payload, nil, []byte("new.com")); !bytes.Equal(payload, payloadAfter) {
+		t.Error("Should replace host", string(payload))
+	}
+
+	payload = []byte("POST /post HTTP/1.0\r\nContent-Length: 7\r\n\r\na=1&b=2")
+
+	if payload = SetHost(payload, nil, []byte("new.com")); !bytes.Equal(payload, payload) {
+		t.Error("Should replace host", string(payload))
+	}
+}
+
+func TestHasResponseTitle(t *testing.T) {
+	var m = map[string]bool{
+		"HTTP":                      false,
+		"":                          false,
+		"HTTP/1.1 100 Continue":     false,
+		"HTTP/1.1 100 Continue\r\n": true,
+		"HTTP/1.1  \r\n":            false,
+		"HTTP/4.0 100Continue\r\n":  false,
+		"HTTP/1.0 100Continue\r\n":  false,
+		"HTTP/1.0 10r Continue\r\n": false,
+		"HTTP/1.1 200\r\n":          true,
+		"HTTP/1.1 200\r\nServer: Tengine\r\nContent-Length: 0\r\nConnection: close\r\n\r\n": true,
+	}
+	for k, v := range m {
+		if HasResponseTitle([]byte(k)) != v {
+			t.Errorf("%q should yield %v", k, v)
+			break
+		}
+	}
+}
+
+func TestHasRequestTitle(t *testing.T) {
+	var m = map[string]bool{
+		"POST /post HTTP/1.0\r\n": true,
+		"":                        false,
+		"POST /post HTTP/1.\r\n":  false,
+		"POS /post HTTP/1.1\r\n":  false,
+		"GET / HTTP/1.1\r\n":      true,
+		"GET / HTTP/1.1\r":        false,
+		"GET / HTTP/1.400\r\n":    false,
+	}
+	for k, v := range m {
+		if HasRequestTitle([]byte(k)) != v {
+			t.Errorf("%q should yield %v", k, v)
+			break
+		}
+	}
+}
+
+func TestCheckChunks(t *testing.T) {
+	var m = "4\r\nWiki\r\n5\r\npedia\r\nE\r\n in\r\n\r\nchunks.\r\n0\r\n\r\n"
+	chunkEnd, _ := CheckChunked([]byte(m))
+	expected := len(m)
+	if chunkEnd != expected {
+		t.Errorf("expected %d to equal %d", chunkEnd, expected)
+	}
+
+	m = "7\r\nMozia\r\n9\r\nDeveloper\r\n7\r\nNetwork\r\n0\r\n\r\n"
+	chunkEnd, _ = CheckChunked([]byte(m))
+	if chunkEnd != 0 {
+		t.Errorf("expected %d to equal %d", chunkEnd, 0)
+	}
+
+	// with trailers
+	m = "4\r\nWiki\r\n5\r\npedia\r\nE\r\n in\r\n\r\nchunks.\r\n0\r\n\r\nEXpires"
+	chunkEnd, _ = CheckChunked([]byte(m))
+	expected = len(m) - 7
+	if chunkEnd != expected {
+		t.Errorf("expected %d to equal %d", chunkEnd, expected)
+	}
+
+	// last chunk inside the body
+	// with trailers
+	m = "4\r\nWiki\r\n5\r\npedia\r\nE\r\n in\r\n\r\nchunks.\r\n3\r\n0\r\n\r\n0\r\n\r\nEXpires"
+	chunkEnd, _ = CheckChunked([]byte(m))
+	expected = len(m) - 7
+	if chunkEnd != expected {
+		t.Errorf("expected %d to equal %d", chunkEnd, expected)
+	}
+
+	// checks with chucks-extensions
+	m = "4\r\nWiki\r\n5\r\npedia\r\nE; name='quoted string'\r\n in\r\n\r\nchunks.\r\n3\r\n0\r\n\r\n0\r\n\r\nEXpires"
+	chunkEnd, _ = CheckChunked([]byte(m))
+	expected = len(m) - 7
+	if chunkEnd != expected {
+		t.Errorf("expected %d to equal %d", chunkEnd, expected)
+	}
+}
+
+func TestHasFullPayload(t *testing.T) {
+	var m string
+	var got, expected bool
+
+	got = HasFullPayload(nil,
+		[]byte("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\n"),
+		[]byte("Transfer-Encoding: chunked\r\n\r\n"),
+		[]byte("7\r\nMozilla\r\n9\r\nDeveloper\r\n"),
+		[]byte("7\r\nNetwork\r\n0\r\n\r\n"))
+	expected = true
+	if got != expected {
+		t.Errorf("expected %v to equal %v", got, expected)
+	}
+
+	// check chunks with trailers
+	m = "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nTransfer-Encoding: chunked\r\nTrailer: Expires\r\n\r\n7\r\nMozilla\r\n9\r\nDeveloper\r\n7\r\nNetwork\r\n0\r\n\r\nExpires: Wed, 21 Oct 2015 07:28:00 GMT\r\n\r\n"
+	got = HasFullPayload(nil, []byte(m))
+	expected = true
+	if got != expected {
+		t.Errorf("expected %v to equal %v", got, expected)
+	}
+
+	// check with missing trailers
+	m = "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nTransfer-Encoding: chunked\r\nTrailer: Expires\r\n\r\n7\r\nMozilla\r\n9\r\nDeveloper\r\n7\r\nNetwork\r\n0\r\n\r\nExpires: Wed, 21 Oct 2015 07:28:00"
+	got = HasFullPayload(nil, []byte(m))
+	expected = false
+	if got != expected {
+		t.Errorf("expected %v to equal %v", got, expected)
+	}
+
+	// check with content-length
+	m = "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: 23\r\n\r\nMozillaDeveloperNetwork"
+	got = HasFullPayload(nil, []byte(m))
+	expected = true
+	if got != expected {
+		t.Errorf("expected %v to equal %v", got, expected)
+	}
+
+	// check missing total length
+	m = "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: 23\r\n\r\nMozillaDeveloperNet"
+	got = HasFullPayload(nil, []byte(m))
+	expected = false
+	if got != expected {
+		t.Errorf("expected %v to equal %v", got, expected)
+	}
+
+	// check with no body
+	m = "HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\n\r\n"
+	got = HasFullPayload(nil, []byte(m))
+	expected = true
+	if got != expected {
+		t.Errorf("expected %v to equal %v", got, expected)
+	}
+}
+
+func BenchmarkHasFullPayload(b *testing.B) {
+	data := []byte("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nTransfer-Encoding: chunked\r\n\r\n1e\r\n111111111111111111111111111111\r\n0\r\n\r\n")
+	for i := 0; i < b.N; i++ {
+		if !HasFullPayload(nil, data) {
+			b.Fail()
+		}
+	}
 }

protocol.go

@@ -4,7 +4,7 @@ import (
 	"bytes"
 	"crypto/rand"
 	"encoding/hex"
-	"strconv"
+	"fmt"
 )
 
 // These constants help to indicate the type of payload
@@ -48,37 +48,9 @@ func payloadScanner(data []byte, atEOF bool) (advance int, token []byte, err err
 
 // Timing is request start or round-trip time, depending on payloadType
 func payloadHeader(payloadType byte, uuid []byte, timing int64, latency int64) (header []byte) {
-	var sTime, sLatency string
-
-	sTime = strconv.FormatInt(timing, 10)
-	if latency != -1 {
-		sLatency = strconv.FormatInt(latency, 10)
-	}
-
 	//Example:
-	//  3 f45590522cd1838b4a0d5c5aab80b77929dea3b3 1231\n
-	// `+ 1` indicates space characters or end of line
-	headerLen := 1 + 1 + len(uuid) + 1 + len(sTime) + 1
-
-	if latency != -1 {
-		headerLen += len(sLatency) + 1
-	}
-
-	header = make([]byte, headerLen)
-	header[0] = payloadType
-	header[1] = ' '
-	header[2+len(uuid)] = ' '
-	header[len(header)-1] = '\n'
-
-	copy(header[2:], uuid)
-	copy(header[3+len(uuid):], sTime)
-
-	if latency != -1 {
-		header[3+len(uuid)+len(sTime)] = ' '
-		copy(header[4+len(uuid)+len(sTime):], sLatency)
-	}
-
-	return header
+	//  3 f45590522cd1838b4a0d5c5aab80b77929dea3b3 13923489726487326 1231\n
+	return []byte(fmt.Sprintf("%c %s %d %d\n", payloadType, uuid, timing, latency))
 }
 
 func payloadBody(payload []byte) []byte {
@@ -89,28 +61,32 @@ func payloadBody(payload []byte) []byte {
 func payloadMeta(payload []byte) [][]byte {
 	headerSize := bytes.IndexByte(payload, '\n')
 	if headerSize < 0 {
-		headerSize = 0
+		return nil
 	}
 	return bytes.Split(payload[:headerSize], []byte{' '})
 }
 
-func payloadID(payload []byte) []byte {
-	idx := bytes.IndexByte(payload[2:], ' ')
-
-	if idx == -1 {
-		return []byte{}
+func payloadMetaWithBody(payload []byte) (meta, body []byte) {
+	if i := bytes.IndexByte(payload, '\n'); i > 0 && len(payload) > i+1 {
+		meta = payload[:i+1]
+		body = payload[i+1:]
+		return
 	}
+	// we assume the message did not have meta data
+	return nil, payload
+}
 
-	return payload[2 : 2+idx]
+func payloadID(payload []byte) (id []byte) {
+	meta := payloadMeta(payload)
+
+	if len(meta) < 2 {
+		return
+	}
+	return meta[1]
 }
 
 func isOriginPayload(payload []byte) bool {
-	switch payload[0] {
-	case RequestPayload, ResponsePayload:
-		return true
-	default:
-		return false
-	}
+	return payload[0] == RequestPayload || payload[0] == ResponsePayload
 }
 
 func isRequestPayload(payload []byte) bool {

settings.go

@@ -3,15 +3,16 @@ package main
 import (
 	"flag"
 	"fmt"
-	"log"
 	"os"
-	"regexp"
-	"runtime"
 	"strconv"
+	"strings"
 	"sync"
 	"time"
+
+	"github.com/buger/goreplay/size"
 )
 
+// DEMO indicates that goreplay is running in demo mode
 var DEMO string
 
 // MultiOption allows to specify multiple flags with same name and collects all values into array
@@ -29,64 +30,52 @@ func (h *MultiOption) Set(value string) error {
 
 // AppSettings is the struct of main configuration
 type AppSettings struct {
-	verbose   bool
-	debug     bool
-	stats     bool
-	exitAfter time.Duration
+	Verbose   int           `json:"verbose"`
+	Stats     bool          `json:"stats"`
+	ExitAfter time.Duration `json:"exit-after"`
 
-	splitOutput          bool
-	recognizeTCPSessions bool
-	pprof                string
+	SplitOutput          bool   `json:"split-output"`
+	RecognizeTCPSessions bool   `json:"recognize-tcp-sessions"`
+	Pprof                string `json:"http-pprof"`
 
-	inputDummy   MultiOption
-	outputDummy  MultiOption
-	outputStdout bool
-	outputNull   bool
+	InputDummy   MultiOption `json:"input-dummy"`
+	OutputDummy  MultiOption
+	OutputStdout bool `json:"output-stdout"`
+	OutputNull   bool `json:"output-null"`
 
-	inputTCP        MultiOption
-	inputTCPConfig  TCPInputConfig
-	outputTCP       MultiOption
-	outputTCPConfig TCPOutputConfig
-	outputTCPStats  bool
+	InputTCP        MultiOption `json:"input-tcp"`
+	InputTCPConfig  TCPInputConfig
+	OutputTCP       MultiOption `json:"output-tcp"`
+	OutputTCPConfig TCPOutputConfig
+	OutputTCPStats  bool `json:"output-tcp-stats"`
 
-	inputFile        MultiOption
-	inputFileLoop    bool
-	outputFile       MultiOption
-	outputFileConfig FileOutputConfig
+	InputFile        MultiOption `json:"input-file"`
+	InputFileLoop    bool        `json:"input-file-loop"`
+	OutputFile       MultiOption `json:"output-file"`
+	OutputFileConfig FileOutputConfig
 
-	inputRAW                MultiOption
-	inputRAWEngine          string
-	inputRAWTrackResponse   bool
-	inputRAWRealIPHeader    string
-	inputRAWExpire          time.Duration
-	inputRAWProtocol        string
-	inputRAWBpfFilter       string
-	inputRAWTimestampType   string
-	copyBufferSize          int64
-	inputRAWImmediateMode   bool
-	inputRAWBufferSize      int64
-	inputRAWOverrideSnapLen bool
+	InputRAW MultiOption `json:"input_raw"`
+	RAWInputConfig
 
-	inputRAWBufferSizeFlag string
-	outputFileSizeFlag     string
-	outputFileMaxSizeFlag  string
-	copyBufferSizeFlag     string
+	Middleware string `json:"middleware"`
 
-	middleware string
+	InputHTTP    MultiOption
+	OutputHTTP   MultiOption `json:"output-http"`
+	PrettifyHTTP bool        `json:"prettify-http"`
 
-	inputHTTP    MultiOption
-	outputHTTP   MultiOption
-	prettifyHTTP bool
+	MaxAllowedMem string `json:"max-allowed-mem"`
+	maxAllowedMem int    `json:"-"`
 
-	outputHTTPConfig HTTPOutputConfig
+	OutputHTTPConfig HTTPOutputConfig
 
-	outputBinary       MultiOption
-	outputBinaryConfig BinaryOutputConfig
+	OutputBinary       MultiOption `json:"output-binary"`
+	OutputBinaryConfig BinaryOutputConfig
 
-	modifierConfig HTTPModifierConfig
+	ModifierConfig HTTPModifierConfig
 
-	inputKafkaConfig  KafkaConfig
-	outputKafkaConfig KafkaConfig
+	InputKafkaConfig  InputKafkaConfig
+	OutputKafkaConfig OutputKafkaConfig
+	KafkaTLSConfig    KafkaTLSConfig
 }
 
 // Settings holds Gor configuration
@@ -100,259 +89,172 @@ func usage() {
 
 func init() {
 	flag.Usage = usage
-
-	flag.StringVar(&Settings.pprof, "http-pprof", "", "Enable profiling. Starts  http server on specified port, exposing special /debug/pprof endpoint. Example: `:8181`")
-	flag.BoolVar(&Settings.verbose, "verbose", false, "Turn on more verbose output")
-	flag.BoolVar(&Settings.debug, "debug", false, "Turn on debug output, shows all intercepted traffic. Works only when with `verbose` flag")
-	flag.BoolVar(&Settings.stats, "stats", false, "Turn on queue stats output")
+	flag.StringVar(&Settings.Pprof, "http-pprof", "", "Enable profiling. Starts  http server on specified port, exposing special /debug/pprof endpoint. Example: `:8181`")
+	flag.IntVar(&Settings.Verbose, "verbose", 0, "set the level of verbosity, if greater than zero then it will turn on debug output")
+	flag.BoolVar(&Settings.Stats, "stats", false, "Turn on queue stats output")
 
 	if DEMO == "" {
-		flag.DurationVar(&Settings.exitAfter, "exit-after", 0, "exit after specified duration")
+		flag.DurationVar(&Settings.ExitAfter, "exit-after", 0, "exit after specified duration")
 	} else {
-		Settings.exitAfter = 5 * time.Minute
+		Settings.ExitAfter = 5 * time.Minute
 	}
 
-	flag.BoolVar(&Settings.splitOutput, "split-output", false, "By default each output gets same traffic. If set to `true` it splits traffic equally among all outputs.")
+	flag.BoolVar(&Settings.SplitOutput, "split-output", false, "By default each output gets same traffic. If set to `true` it splits traffic equally among all outputs.")
+	flag.BoolVar(&Settings.RecognizeTCPSessions, "recognize-tcp-sessions", false, "[PRO] If turned on http output will create separate worker for each TCP session. Splitting output will session based as well.")
 
-	flag.BoolVar(&Settings.recognizeTCPSessions, "recognize-tcp-sessions", false, "[PRO] If turned on http output will create separate worker for each TCP session. Splitting output will session based as well.")
+	flag.Var(&Settings.InputDummy, "input-dummy", "Used for testing outputs. Emits 'Get /' request every 1s")
+	flag.BoolVar(&Settings.OutputStdout, "output-stdout", false, "Used for testing inputs. Just prints to console data coming from inputs.")
+	flag.BoolVar(&Settings.OutputNull, "output-null", false, "Used for testing inputs. Drops all requests.")
 
-	flag.Var(&Settings.inputDummy, "input-dummy", "Used for testing outputs. Emits 'Get /' request every 1s")
-	flag.Var(&Settings.outputDummy, "output-dummy", "DEPRECATED: use --output-stdout instead")
+	flag.Var(&Settings.InputTCP, "input-tcp", "Used for internal communication between Gor instances. Example: \n\t# Receive requests from other Gor instances on 28020 port, and redirect output to staging\n\tgor --input-tcp :28020 --output-http staging.com")
+	flag.BoolVar(&Settings.InputTCPConfig.Secure, "input-tcp-secure", false, "Turn on TLS security. Do not forget to specify certificate and key files.")
+	flag.StringVar(&Settings.InputTCPConfig.CertificatePath, "input-tcp-certificate", "", "Path to PEM encoded certificate file. Used when TLS turned on.")
+	flag.StringVar(&Settings.InputTCPConfig.KeyPath, "input-tcp-certificate-key", "", "Path to PEM encoded certificate key file. Used when TLS turned on.")
 
-	flag.BoolVar(&Settings.outputStdout, "output-stdout", false, "Used for testing inputs. Just prints to console data coming from inputs.")
+	flag.Var(&Settings.OutputTCP, "output-tcp", "Used for internal communication between Gor instances. Example: \n\t# Listen for requests on 80 port and forward them to other Gor instance on 28020 port\n\tgor --input-raw :80 --output-tcp replay.local:28020")
+	flag.BoolVar(&Settings.OutputTCPConfig.Secure, "output-tcp-secure", false, "Use TLS secure connection. --input-file on another end should have TLS turned on as well.")
+	flag.BoolVar(&Settings.OutputTCPConfig.SkipVerify, "output-tcp-skip-verify", false, "Don't verify hostname on TLS secure connection.")
+	flag.BoolVar(&Settings.OutputTCPConfig.Sticky, "output-tcp-sticky", false, "Use Sticky connection. Request/Response with same ID will be sent to the same connection.")
+	flag.IntVar(&Settings.OutputTCPConfig.Workers, "output-tcp-workers", 10, "Number of parallel tcp connections, default is 10")
+	flag.BoolVar(&Settings.OutputTCPStats, "output-tcp-stats", false, "Report TCP output queue stats to console every 5 seconds.")
 
-	flag.BoolVar(&Settings.outputNull, "output-null", false, "Used for testing inputs. Drops all requests.")
+	flag.Var(&Settings.InputFile, "input-file", "Read requests from file: \n\tgor --input-file ./requests.gor --output-http staging.com")
+	flag.BoolVar(&Settings.InputFileLoop, "input-file-loop", false, "Loop input files, useful for performance testing.")
 
-	flag.Var(&Settings.inputTCP, "input-tcp", "Used for internal communication between Gor instances. Example: \n\t# Receive requests from other Gor instances on 28020 port, and redirect output to staging\n\tgor --input-tcp :28020 --output-http staging.com")
-	flag.BoolVar(&Settings.inputTCPConfig.secure, "input-tcp-secure", false, "Turn on TLS security. Do not forget to specify certificate and key files.")
-	flag.StringVar(&Settings.inputTCPConfig.certificatePath, "input-tcp-certificate", "", "Path to PEM encoded certificate file. Used when TLS turned on.")
-	flag.StringVar(&Settings.inputTCPConfig.keyPath, "input-tcp-certificate-key", "", "Path to PEM encoded certificate key file. Used when TLS turned on.")
+	flag.Var(&Settings.OutputFile, "output-file", "Write incoming requests to file: \n\tgor --input-raw :80 --output-file ./requests.gor")
+	flag.DurationVar(&Settings.OutputFileConfig.FlushInterval, "output-file-flush-interval", time.Second, "Interval for forcing buffer flush to the file, default: 1s.")
+	flag.BoolVar(&Settings.OutputFileConfig.Append, "output-file-append", false, "The flushed chunk is appended to existence file or not. ")
+	flag.Var(&Settings.OutputFileConfig.SizeLimit, "output-file-size-limit", "Size of each chunk. Default: 32mb")
+	flag.IntVar(&Settings.OutputFileConfig.QueueLimit, "output-file-queue-limit", 256, "The length of the chunk queue. Default: 256")
+	flag.Var(&Settings.OutputFileConfig.OutputFileMaxSize, "output-file-max-size-limit", "Max size of output file, Default: 1TB")
 
-	flag.Var(&Settings.outputTCP, "output-tcp", "Used for internal communication between Gor instances. Example: \n\t# Listen for requests on 80 port and forward them to other Gor instance on 28020 port\n\tgor --input-raw :80 --output-tcp replay.local:28020")
-	flag.BoolVar(&Settings.outputTCPConfig.secure, "output-tcp-secure", false, "Use TLS secure connection. --input-file on another end should have TLS turned on as well.")
-	flag.BoolVar(&Settings.outputTCPConfig.sticky, "output-tcp-sticky", false, "Use Sticky connection. Request/Response with same ID will be sent to the same connection.")
-	flag.BoolVar(&Settings.outputTCPStats, "output-tcp-stats", false, "Report TCP output queue stats to console every 5 seconds.")
+	flag.StringVar(&Settings.OutputFileConfig.BufferPath, "output-file-buffer", "/tmp", "The path for temporary storing current buffer: \n\tgor --input-raw :80 --output-file s3://mybucket/logs/%Y-%m-%d.gz --output-file-buffer /mnt/logs")
 
-	flag.Var(&Settings.inputFile, "input-file", "Read requests from file: \n\tgor --input-file ./requests.gor --output-http staging.com")
-	flag.BoolVar(&Settings.inputFileLoop, "input-file-loop", false, "Loop input files, useful for performance testing.")
+	flag.BoolVar(&Settings.PrettifyHTTP, "prettify-http", false, "If enabled, will automatically decode requests and responses with: Content-Encoding: gzip and Transfer-Encoding: chunked. Useful for debugging, in conjuction with --output-stdout")
 
-	flag.Var(&Settings.outputFile, "output-file", "Write incoming requests to file: \n\tgor --input-raw :80 --output-file ./requests.gor")
-	flag.DurationVar(&Settings.outputFileConfig.flushInterval, "output-file-flush-interval", time.Second, "Interval for forcing buffer flush to the file, default: 1s.")
-	flag.BoolVar(&Settings.outputFileConfig.append, "output-file-append", false, "The flushed chunk is appended to existence file or not. ")
-	flag.StringVar(&Settings.outputFileSizeFlag, "output-file-size-limit", "32mb", "Size of each chunk. Default: 32mb")
-	flag.Int64Var(&Settings.outputFileConfig.queueLimit, "output-file-queue-limit", 256, "The length of the chunk queue. Default: 256")
-	flag.StringVar(&Settings.outputFileMaxSizeFlag, "output-file-max-size-limit", "1TB", "Max size of output file, Default: 1TB")
+	// input raw flags
+	flag.Var(&Settings.InputRAW, "input-raw", "Capture traffic from given port (use RAW sockets and require *sudo* access):\n\t# Capture traffic from 8080 port\n\tgor --input-raw :8080 --output-http staging.com")
+	flag.BoolVar(&Settings.TrackResponse, "input-raw-track-response", false, "If turned on Gor will track responses in addition to requests, and they will be available to middleware and file output.")
+	flag.Var(&Settings.Engine, "input-raw-engine", "Intercept traffic using `libpcap` (default), `raw_socket` or `pcap_file`")
+	flag.Var(&Settings.Protocol, "input-raw-protocol", "Specify application protocol of intercepted traffic. Possible values: http, binary")
+	flag.StringVar(&Settings.RealIPHeader, "input-raw-realip-header", "", "If not blank, injects header with given name and real IP value to the request payload. Usually this header should be named: X-Real-IP")
+	flag.DurationVar(&Settings.Expire, "input-raw-expire", time.Second*2, "How much it should wait for the last TCP packet, till consider that TCP message complete.")
+	flag.StringVar(&Settings.BPFFilter, "input-raw-bpf-filter", "", "BPF filter to write custom expressions. Can be useful in case of non standard network interfaces like tunneling or SPAN port. Example: --input-raw-bpf-filter 'dst port 80'")
+	flag.StringVar(&Settings.TimestampType, "input-raw-timestamp-type", "", "Possible values: PCAP_TSTAMP_HOST, PCAP_TSTAMP_HOST_LOWPREC, PCAP_TSTAMP_HOST_HIPREC, PCAP_TSTAMP_ADAPTER, PCAP_TSTAMP_ADAPTER_UNSYNCED. This values not supported on all systems, GoReplay will tell you available values of you put wrong one.")
+	flag.Var(&Settings.CopyBufferSize, "copy-buffer-size", "Set the buffer size for an individual request (default 5MB)")
+	flag.BoolVar(&Settings.Snaplen, "input-raw-override-snaplen", false, "Override the capture snaplen to be 64k. Required for some Virtualized environments")
+	flag.DurationVar(&Settings.BufferTimeout, "input-raw-buffer-timeout", 0, "set the pcap timeout. for immediate mode don't set this flag")
+	flag.Var(&Settings.BufferSize, "input-raw-buffer-size", "Controls size of the OS buffer which holds packets until they dispatched. Default value depends by system: in Linux around 2MB. If you see big package drop, increase this value.")
+	flag.BoolVar(&Settings.Promiscuous, "input-raw-promisc", false, "enable promiscuous mode")
+	flag.BoolVar(&Settings.Monitor, "input-raw-monitor", false, "enable RF monitor mode")
+	flag.BoolVar(&Settings.Stats, "input-raw-stats", false, "enable stats generator on raw TCP messages")
 
-	flag.StringVar(&Settings.outputFileConfig.bufferPath, "output-file-buffer", "/tmp", "The path for temporary storing current buffer: \n\tgor --input-raw :80 --output-file s3://mybucket/logs/%Y-%m-%d.gz --output-file-buffer /mnt/logs")
+	flag.StringVar(&Settings.MaxAllowedMem, "max-allowed-mem", "", "Allow specify memory which can be consumed by the process. Example: --max-allowed-mem 10%, --max-allowed-mem 200m")
 
-	flag.BoolVar(&Settings.prettifyHTTP, "prettify-http", false, "If enabled, will automatically decode requests and responses with: Content-Encodning: gzip and Transfer-Encoding: chunked. Useful for debugging, in conjuction with --output-stdout")
+	flag.StringVar(&Settings.Middleware, "middleware", "", "Used for modifying traffic using external command")
 
-	flag.Var(&Settings.inputRAW, "input-raw", "Capture traffic from given port (use RAW sockets and require *sudo* access):\n\t# Capture traffic from 8080 port\n\tgor --input-raw :8080 --output-http staging.com")
-
-	flag.BoolVar(&Settings.inputRAWTrackResponse, "input-raw-track-response", false, "If turned on Gor will track responses in addition to requests, and they will be available to middleware and file output.")
-
-	flag.StringVar(&Settings.inputRAWEngine, "input-raw-engine", "libpcap", "Intercept traffic using `libpcap` (default), and `raw_socket`")
-
-	flag.StringVar(&Settings.inputRAWProtocol, "input-raw-protocol", "http", "Specify application protocol of intercepted traffic. Possible values: http, binary")
-
-	flag.StringVar(&Settings.inputRAWRealIPHeader, "input-raw-realip-header", "", "If not blank, injects header with given name and real IP value to the request payload. Usually this header should be named: X-Real-IP")
-
-	flag.DurationVar(&Settings.inputRAWExpire, "input-raw-expire", time.Second*2, "How much it should wait for the last TCP packet, till consider that TCP message complete.")
-
-	flag.StringVar(&Settings.inputRAWBpfFilter, "input-raw-bpf-filter", "", "BPF filter to write custom expressions. Can be useful in case of non standard network interfaces like tunneling or SPAN port. Example: --input-raw-bpf-filter 'dst port 80'")
-
-	flag.StringVar(&Settings.inputRAWTimestampType, "input-raw-timestamp-type", "", "Possible values: PCAP_TSTAMP_HOST, PCAP_TSTAMP_HOST_LOWPREC, PCAP_TSTAMP_HOST_HIPREC, PCAP_TSTAMP_ADAPTER, PCAP_TSTAMP_ADAPTER_UNSYNCED. This values not supported on all systems, GoReplay will tell you available values of you put wrong one.")
-	flag.StringVar(&Settings.copyBufferSizeFlag, "copy-buffer-size", "5mb", "Set the buffer size for an individual request (default 5MB)")
-	flag.BoolVar(&Settings.inputRAWOverrideSnapLen, "input-raw-override-snaplen", false, "Override the capture snaplen to be 64k. Required for some Virtualized environments")
-	flag.BoolVar(&Settings.inputRAWImmediateMode, "input-raw-immediate-mode", false, "Set pcap interface to immediate mode.")
-	flag.StringVar(&Settings.inputRAWBufferSizeFlag, "input-raw-buffer-size", "0", "Controls size of the OS buffer which holds packets until they dispatched. Default value depends by system: in Linux around 2MB. If you see big package drop, increase this value.")
-
-	flag.StringVar(&Settings.middleware, "middleware", "", "Used for modifying traffic using external command")
-
-	// flag.Var(&Settings.inputHTTP, "input-http", "Read requests from HTTP, should be explicitly sent from your application:\n\t# Listen for http on 9000\n\tgor --input-http :9000 --output-http staging.com")
-
-	flag.Var(&Settings.outputHTTP, "output-http", "Forwards incoming requests to given http address.\n\t# Redirect all incoming requests to staging.com address \n\tgor --input-raw :80 --output-http http://staging.com")
+	flag.Var(&Settings.OutputHTTP, "output-http", "Forwards incoming requests to given http address.\n\t# Redirect all incoming requests to staging.com address \n\tgor --input-raw :80 --output-http http://staging.com")
 
 	/* outputHTTPConfig */
-	flag.IntVar(&Settings.outputHTTPConfig.BufferSize, "output-http-response-buffer", 0, "HTTP response buffer size, all data after this size will be discarded.")
-	flag.BoolVar(&Settings.outputHTTPConfig.CompatibilityMode, "output-http-compatibility-mode", false, "Use standard Go client, instead of built-in implementation. Can be slower, but more compatible.")
+	flag.Var(&Settings.OutputHTTPConfig.BufferSize, "output-http-response-buffer", "HTTP response buffer size, all data after this size will be discarded.")
+	flag.IntVar(&Settings.OutputHTTPConfig.WorkersMin, "output-http-workers-min", 0, "Gor uses dynamic worker scaling. Enter a number to set a minimum number of workers. default = 1.")
+	flag.IntVar(&Settings.OutputHTTPConfig.WorkersMax, "output-http-workers", 0, "Gor uses dynamic worker scaling. Enter a number to set a maximum number of workers. default = 0 = unlimited.")
+	flag.IntVar(&Settings.OutputHTTPConfig.QueueLen, "output-http-queue-len", 1000, "Number of requests that can be queued for output, if all workers are busy. default = 1000")
+	flag.BoolVar(&Settings.OutputHTTPConfig.SkipVerify, "output-http-skip-verify", false, "Don't verify hostname on TLS secure connection.")
+	flag.DurationVar(&Settings.OutputHTTPConfig.WorkerTimeout, "output-http-worker-timeout", 2*time.Second, "Duration to rollback idle workers.")
 
-	flag.IntVar(&Settings.outputHTTPConfig.workersMin, "output-http-workers-min", 0, "Gor uses dynamic worker scaling. Enter a number to set a minimum number of workers. default = 1.")
-	flag.IntVar(&Settings.outputHTTPConfig.workersMax, "output-http-workers", 0, "Gor uses dynamic worker scaling. Enter a number to set a maximum number of workers. default = 0 = unlimited.")
-	flag.IntVar(&Settings.outputHTTPConfig.queueLen, "output-http-queue-len", 1000, "Number of requests that can be queued for output, if all workers are busy. default = 1000")
+	flag.IntVar(&Settings.OutputHTTPConfig.RedirectLimit, "output-http-redirects", 0, "Enable how often redirects should be followed.")
+	flag.DurationVar(&Settings.OutputHTTPConfig.Timeout, "output-http-timeout", 5*time.Second, "Specify HTTP request/response timeout. By default 5s. Example: --output-http-timeout 30s")
+	flag.BoolVar(&Settings.OutputHTTPConfig.TrackResponses, "output-http-track-response", false, "If turned on, HTTP output responses will be set to all outputs like stdout, file and etc.")
 
-	flag.IntVar(&Settings.outputHTTPConfig.redirectLimit, "output-http-redirects", 0, "Enable how often redirects should be followed.")
-	flag.DurationVar(&Settings.outputHTTPConfig.Timeout, "output-http-timeout", 5*time.Second, "Specify HTTP request/response timeout. By default 5s. Example: --output-http-timeout 30s")
-	flag.BoolVar(&Settings.outputHTTPConfig.TrackResponses, "output-http-track-response", false, "If turned on, HTTP output responses will be set to all outputs like stdout, file and etc.")
-
-	flag.BoolVar(&Settings.outputHTTPConfig.stats, "output-http-stats", false, "Report http output queue stats to console every N milliseconds. See output-http-stats-ms")
-	flag.IntVar(&Settings.outputHTTPConfig.statsMs, "output-http-stats-ms", 5000, "Report http output queue stats to console every N milliseconds. default: 5000")
-	flag.BoolVar(&Settings.outputHTTPConfig.OriginalHost, "http-original-host", false, "Normally gor replaces the Host http header with the host supplied with --output-http.  This option disables that behavior, preserving the original Host header.")
-	flag.BoolVar(&Settings.outputHTTPConfig.Debug, "output-http-debug", false, "Enables http debug output.")
-	flag.StringVar(&Settings.outputHTTPConfig.elasticSearch, "output-http-elasticsearch", "", "Send request and response stats to ElasticSearch:\n\tgor --input-raw :8080 --output-http staging.com --output-http-elasticsearch 'es_host:api_port/index_name'")
+	flag.BoolVar(&Settings.OutputHTTPConfig.Stats, "output-http-stats", false, "Report http output queue stats to console every N milliseconds. See output-http-stats-ms")
+	flag.IntVar(&Settings.OutputHTTPConfig.StatsMs, "output-http-stats-ms", 5000, "Report http output queue stats to console every N milliseconds. default: 5000")
+	flag.BoolVar(&Settings.OutputHTTPConfig.OriginalHost, "http-original-host", false, "Normally gor replaces the Host http header with the host supplied with --output-http.  This option disables that behavior, preserving the original Host header.")
+	flag.StringVar(&Settings.OutputHTTPConfig.ElasticSearch, "output-http-elasticsearch", "", "Send request and response stats to ElasticSearch:\n\tgor --input-raw :8080 --output-http staging.com --output-http-elasticsearch 'es_host:api_port/index_name'")
 	/* outputHTTPConfig */
 
-	flag.Var(&Settings.outputBinary, "output-binary", "Forwards incoming binary payloads to given address.\n\t# Redirect all incoming requests to staging.com address \n\tgor --input-raw :80 --input-raw-protocol binary --output-binary staging.com:80")
-	/* outputBinaryConfig */
-	flag.IntVar(&Settings.outputBinaryConfig.BufferSize, "output-tcp-response-buffer", 0, "TCP response buffer size, all data after this size will be discarded.")
-	flag.IntVar(&Settings.outputBinaryConfig.workers, "output-binary-workers", 0, "Gor uses dynamic worker scaling by default.  Enter a number to run a set number of workers.")
-	flag.DurationVar(&Settings.outputBinaryConfig.Timeout, "output-binary-timeout", 0, "Specify HTTP request/response timeout. By default 5s. Example: --output-binary-timeout 30s")
-	flag.BoolVar(&Settings.outputBinaryConfig.TrackResponses, "output-binary-track-response", false, "If turned on, Binary output responses will be set to all outputs like stdout, file and etc.")
+	flag.Var(&Settings.OutputBinary, "output-binary", "Forwards incoming binary payloads to given address.\n\t# Redirect all incoming requests to staging.com address \n\tgor --input-raw :80 --input-raw-protocol binary --output-binary staging.com:80")
 
-	flag.BoolVar(&Settings.outputBinaryConfig.Debug, "output-binary-debug", false, "Enables binary debug output.")
+	/* outputBinaryConfig */
+	flag.Var(&Settings.OutputBinaryConfig.BufferSize, "output-tcp-response-buffer", "TCP response buffer size, all data after this size will be discarded.")
+	flag.IntVar(&Settings.OutputBinaryConfig.Workers, "output-binary-workers", 0, "Gor uses dynamic worker scaling by default.  Enter a number to run a set number of workers.")
+	flag.DurationVar(&Settings.OutputBinaryConfig.Timeout, "output-binary-timeout", 0, "Specify HTTP request/response timeout. By default 5s. Example: --output-binary-timeout 30s")
+	flag.BoolVar(&Settings.OutputBinaryConfig.TrackResponses, "output-binary-track-response", false, "If turned on, Binary output responses will be set to all outputs like stdout, file and etc.")
+
+	flag.BoolVar(&Settings.OutputBinaryConfig.Debug, "output-binary-debug", false, "Enables binary debug output.")
 	/* outputBinaryConfig */
 
-	flag.StringVar(&Settings.outputKafkaConfig.host, "output-kafka-host", "", "Read request and response stats from Kafka:\n\tgor --input-raw :8080 --output-kafka-host '192.168.0.1:9092,192.168.0.2:9092'")
-	flag.StringVar(&Settings.outputKafkaConfig.topic, "output-kafka-topic", "", "Read request and response stats from Kafka:\n\tgor --input-raw :8080 --output-kafka-topic 'kafka-log'")
-	flag.BoolVar(&Settings.outputKafkaConfig.useJSON, "output-kafka-json-format", false, "If turned on, it will serialize messages from GoReplay text format to JSON.")
+	flag.StringVar(&Settings.OutputKafkaConfig.Host, "output-kafka-host", "", "Read request and response stats from Kafka:\n\tgor --input-raw :8080 --output-kafka-host '192.168.0.1:9092,192.168.0.2:9092'")
+	flag.StringVar(&Settings.OutputKafkaConfig.Topic, "output-kafka-topic", "", "Read request and response stats from Kafka:\n\tgor --input-raw :8080 --output-kafka-topic 'kafka-log'")
+	flag.BoolVar(&Settings.OutputKafkaConfig.UseJSON, "output-kafka-json-format", false, "If turned on, it will serialize messages from GoReplay text format to JSON.")
 
-	flag.StringVar(&Settings.inputKafkaConfig.host, "input-kafka-host", "", "Send request and response stats to Kafka:\n\tgor --output-stdout --input-kafka-host '192.168.0.1:9092,192.168.0.2:9092'")
-	flag.StringVar(&Settings.inputKafkaConfig.topic, "input-kafka-topic", "", "Send request and response stats to Kafka:\n\tgor --output-stdout --input-kafka-topic 'kafka-log'")
-	flag.BoolVar(&Settings.inputKafkaConfig.useJSON, "input-kafka-json-format", false, "If turned on, it will assume that messages coming in JSON format rather than  GoReplay text format.")
+	flag.StringVar(&Settings.InputKafkaConfig.Host, "input-kafka-host", "", "Send request and response stats to Kafka:\n\tgor --output-stdout --input-kafka-host '192.168.0.1:9092,192.168.0.2:9092'")
+	flag.StringVar(&Settings.InputKafkaConfig.Topic, "input-kafka-topic", "", "Send request and response stats to Kafka:\n\tgor --output-stdout --input-kafka-topic 'kafka-log'")
+	flag.BoolVar(&Settings.InputKafkaConfig.UseJSON, "input-kafka-json-format", false, "If turned on, it will assume that messages coming in JSON format rather than  GoReplay text format.")
 
-	flag.Var(&Settings.modifierConfig.headers, "http-set-header", "Inject additional headers to http reqest:\n\tgor --input-raw :8080 --output-http staging.com --http-set-header 'User-Agent: Gor'")
-	flag.Var(&Settings.modifierConfig.headers, "output-http-header", "WARNING: `--output-http-header` DEPRECATED, use `--http-set-header` instead")
+	flag.StringVar(&Settings.KafkaTLSConfig.CACert, "kafka-tls-ca-cert", "", "CA certificate for Kafka TLS Config:\n\tgor  --input-raw :3000 --output-kafka-host '192.168.0.1:9092' --output-kafka-topic 'topic' --kafka-tls-ca-cert cacert.cer.pem --kafka-tls-client-cert client.cer.pem --kafka-tls-client-key client.key.pem")
+	flag.StringVar(&Settings.KafkaTLSConfig.ClientCert, "kafka-tls-client-cert", "", "Client certificate for Kafka TLS Config (mandatory with to kafka-tls-ca-cert and kafka-tls-client-key)")
+	flag.StringVar(&Settings.KafkaTLSConfig.ClientKey, "kafka-tls-client-key", "", "Client Key for Kafka TLS Config (mandatory with to kafka-tls-client-cert and kafka-tls-client-key)")
 
-	flag.Var(&Settings.modifierConfig.headerRewrite, "http-rewrite-header", "Rewrite the request header based on a mapping:\n\tgor --input-raw :8080 --output-http staging.com --http-rewrite-header Host: (.*).example.com,$1.beta.example.com")
-
-	flag.Var(&Settings.modifierConfig.params, "http-set-param", "Set request url param, if param already exists it will be overwritten:\n\tgor --input-raw :8080 --output-http staging.com --http-set-param api_key=1")
-
-	flag.Var(&Settings.modifierConfig.methods, "http-allow-method", "Whitelist of HTTP methods to replay. Anything else will be dropped:\n\tgor --input-raw :8080 --output-http staging.com --http-allow-method GET --http-allow-method OPTIONS")
-	flag.Var(&Settings.modifierConfig.methods, "output-http-method", "WARNING: `--output-http-method` DEPRECATED, use `--http-allow-method` instead")
-
-	flag.Var(&Settings.modifierConfig.urlRegexp, "http-allow-url", "A regexp to match requests against. Filter get matched against full url with domain. Anything else will be dropped:\n\t gor --input-raw :8080 --output-http staging.com --http-allow-url ^www.")
-	flag.Var(&Settings.modifierConfig.urlRegexp, "output-http-url-regexp", "WARNING: `--output-http-url-regexp` DEPRECATED, use `--http-allow-url` instead")
-
-	flag.Var(&Settings.modifierConfig.urlNegativeRegexp, "http-disallow-url", "A regexp to match requests against. Filter get matched against full url with domain. Anything else will be forwarded:\n\t gor --input-raw :8080 --output-http staging.com --http-disallow-url ^www.")
-
-	flag.Var(&Settings.modifierConfig.urlRewrite, "http-rewrite-url", "Rewrite the request url based on a mapping:\n\tgor --input-raw :8080 --output-http staging.com --http-rewrite-url /v1/user/([^\\/]+)/ping:/v2/user/$1/ping")
-	flag.Var(&Settings.modifierConfig.urlRewrite, "output-http-rewrite-url", "WARNING: `--output-http-rewrite-url` DEPRECATED, use `--http-rewrite-url` instead")
-
-	flag.Var(&Settings.modifierConfig.headerFilters, "http-allow-header", "A regexp to match a specific header against. Requests with non-matching headers will be dropped:\n\t gor --input-raw :8080 --output-http staging.com --http-allow-header api-version:^v1")
-	flag.Var(&Settings.modifierConfig.headerFilters, "output-http-header-filter", "WARNING: `--output-http-header-filter` DEPRECATED, use `--http-allow-header` instead")
-
-	flag.Var(&Settings.modifierConfig.headerNegativeFilters, "http-disallow-header", "A regexp to match a specific header against. Requests with matching headers will be dropped:\n\t gor --input-raw :8080 --output-http staging.com --http-disallow-header \"User-Agent: Replayed by Gor\"")
-
-	flag.Var(&Settings.modifierConfig.headerBasicAuthFilters, "http-basic-auth-filter", "A regexp to match the decoded basic auth string against. Requests with non-matching headers will be dropped:\n\t gor --input-raw :8080 --output-http staging.com --http-basic-auth-filter \"^customer[0-9].*\"")
-
-	flag.Var(&Settings.modifierConfig.headerHashFilters, "http-header-limiter", "Takes a fraction of requests, consistently taking or rejecting a request based on the FNV32-1A hash of a specific header:\n\t gor --input-raw :8080 --output-http staging.com --http-header-limiter user-id:25%")
-
-	flag.Var(&Settings.modifierConfig.headerHashFilters, "output-http-header-hash-filter", "WARNING: `output-http-header-hash-filter` DEPRECATED, use `--http-header-hash-limiter` instead")
-
-	flag.Var(&Settings.modifierConfig.paramHashFilters, "http-param-limiter", "Takes a fraction of requests, consistently taking or rejecting a request based on the FNV32-1A hash of a specific GET param:\n\t gor --input-raw :8080 --output-http staging.com --http-param-limiter user_id:25%")
+	flag.Var(&Settings.ModifierConfig.Headers, "http-set-header", "Inject additional headers to http reqest:\n\tgor --input-raw :8080 --output-http staging.com --http-set-header 'User-Agent: Gor'")
+	flag.Var(&Settings.ModifierConfig.HeaderRewrite, "http-rewrite-header", "Rewrite the request header based on a mapping:\n\tgor --input-raw :8080 --output-http staging.com --http-rewrite-header Host: (.*).example.com,$1.beta.example.com")
+	flag.Var(&Settings.ModifierConfig.Params, "http-set-param", "Set request url param, if param already exists it will be overwritten:\n\tgor --input-raw :8080 --output-http staging.com --http-set-param api_key=1")
+	flag.Var(&Settings.ModifierConfig.Methods, "http-allow-method", "Whitelist of HTTP methods to replay. Anything else will be dropped:\n\tgor --input-raw :8080 --output-http staging.com --http-allow-method GET --http-allow-method OPTIONS")
+	flag.Var(&Settings.ModifierConfig.URLRegexp, "http-allow-url", "A regexp to match requests against. Filter get matched against full url with domain. Anything else will be dropped:\n\t gor --input-raw :8080 --output-http staging.com --http-allow-url ^www.")
+	flag.Var(&Settings.ModifierConfig.URLNegativeRegexp, "http-disallow-url", "A regexp to match requests against. Filter get matched against full url with domain. Anything else will be forwarded:\n\t gor --input-raw :8080 --output-http staging.com --http-disallow-url ^www.")
+	flag.Var(&Settings.ModifierConfig.URLRewrite, "http-rewrite-url", "Rewrite the request url based on a mapping:\n\tgor --input-raw :8080 --output-http staging.com --http-rewrite-url /v1/user/([^\\/]+)/ping:/v2/user/$1/ping")
+	flag.Var(&Settings.ModifierConfig.HeaderFilters, "http-allow-header", "A regexp to match a specific header against. Requests with non-matching headers will be dropped:\n\t gor --input-raw :8080 --output-http staging.com --http-allow-header api-version:^v1")
+	flag.Var(&Settings.ModifierConfig.HeaderNegativeFilters, "http-disallow-header", "A regexp to match a specific header against. Requests with matching headers will be dropped:\n\t gor --input-raw :8080 --output-http staging.com --http-disallow-header \"User-Agent: Replayed by Gor\"")
+	flag.Var(&Settings.ModifierConfig.HeaderBasicAuthFilters, "http-basic-auth-filter", "A regexp to match the decoded basic auth string against. Requests with non-matching headers will be dropped:\n\t gor --input-raw :8080 --output-http staging.com --http-basic-auth-filter \"^customer[0-9].*\"")
+	flag.Var(&Settings.ModifierConfig.HeaderHashFilters, "http-header-limiter", "Takes a fraction of requests, consistently taking or rejecting a request based on the FNV32-1A hash of a specific header:\n\t gor --input-raw :8080 --output-http staging.com --http-header-limiter user-id:25%")
+	flag.Var(&Settings.ModifierConfig.ParamHashFilters, "http-param-limiter", "Takes a fraction of requests, consistently taking or rejecting a request based on the FNV32-1A hash of a specific GET param:\n\t gor --input-raw :8080 --output-http staging.com --http-param-limiter user_id:25%")
 
 	// default values, using for tests
-	Settings.outputFileConfig.sizeLimit = 33554432
-	Settings.outputFileConfig.outputFileMaxSize = 1099511627776
-	Settings.copyBufferSize = 5242880
-	Settings.inputRAWBufferSize = 0
+	Settings.OutputFileConfig.SizeLimit = 33554432
+	Settings.OutputFileConfig.OutputFileMaxSize = 1099511627776
+	Settings.CopyBufferSize = 5242880
+
 }
 
 func checkSettings() {
-	outputFileSize, err := bufferParser(Settings.outputFileSizeFlag, "32MB")
-	if err != nil {
-		log.Fatalf("output-file-size-limit error: %v\n", err)
+	if Settings.OutputFileConfig.SizeLimit < 1 {
+		Settings.OutputFileConfig.SizeLimit.Set("32mb")
 	}
-	Settings.outputFileConfig.sizeLimit = outputFileSize
-
-	outputFileMaxSize, err := bufferParser(Settings.outputFileMaxSizeFlag, "1TB")
-	if err != nil {
-		log.Fatalf("output-file-max-size-limit error: %v\n", err)
+	if Settings.OutputFileConfig.OutputFileMaxSize < 1 {
+		Settings.OutputFileConfig.OutputFileMaxSize.Set("1tb")
 	}
-	Settings.outputFileConfig.outputFileMaxSize = outputFileMaxSize
-
-	copyBufferSize, err := bufferParser(Settings.copyBufferSizeFlag, "5mb")
-	if err != nil {
-		log.Fatalf("copy-buffer-size error: %v\n", err)
+	if Settings.CopyBufferSize < 1 {
+		Settings.CopyBufferSize.Set("5mb")
 	}
-	Settings.copyBufferSize = copyBufferSize
 
-	inputRAWBufferSize, err := bufferParser(Settings.inputRAWBufferSizeFlag, "0")
-	if err != nil {
-		log.Fatalf("input-raw-buffer-size error: %v\n", err)
-	}
-	Settings.inputRAWBufferSize = inputRAWBufferSize
+	if Settings.MaxAllowedMem != "" {
+		_, totalMemory := memUsage()
+		fmt.Println("Total available memory:", bToMb(totalMemory), "Mb")
+		if strings.HasSuffix(Settings.MaxAllowedMem, "%") {
+			pct, _ := strconv.Atoi(strings.TrimSuffix(Settings.MaxAllowedMem, "%"))
+			Settings.maxAllowedMem = int((float64(pct) / 100) * float64(totalMemory))
+		} else {
+			var s size.Size
+			s.Set(Settings.MaxAllowedMem)
+			Settings.maxAllowedMem = int(s)
+		}
 
-	// libpcap has bug in mac os x. More info: https://github.com/buger/goreplay/issues/730
-	if Settings.inputRAWExpire == time.Second*2 && runtime.GOOS == "darwin" {
-		Settings.inputRAWExpire = time.Second
+		fmt.Println("Limiting memory usage to:", bToMb(uint64(Settings.maxAllowedMem)), "Mb")
 	}
 }
 
 var previousDebugTime = time.Now()
 var debugMutex sync.Mutex
-var pID = os.Getpid()
 
-// Debug take an effect only if --verbose flag specified
-func Debug(args ...interface{}) {
-	if Settings.verbose {
+// Debug take an effect only if --verbose greater than 0 is specified
+func Debug(level int, args ...interface{}) {
+	if Settings.Verbose >= level {
 		debugMutex.Lock()
 		defer debugMutex.Unlock()
 		now := time.Now()
-		diff := now.Sub(previousDebugTime).String()
+		diff := now.Sub(previousDebugTime)
 		previousDebugTime = now
-		fmt.Printf("[DEBUG][PID %d][%s][elapsed %s] ", pID, now.Format(time.StampNano), diff)
-		fmt.Println(args...)
+		fmt.Fprintf(os.Stderr, "[DEBUG][elapsed %s]: ", diff)
+		fmt.Fprintln(os.Stderr, args...)
 	}
 }
-
-// the following regexes follow Go semantics https://golang.org/ref/spec#Letters_and_digits
-var (
-	rB   = regexp.MustCompile(`(?i)^(?:0b|0x|0o)?[\da-f_]+$`)
-	rKB  = regexp.MustCompile(`(?i)^(?:0b|0x|0o)?[\da-f_]+kb$`)
-	rMB  = regexp.MustCompile(`(?i)^(?:0b|0x|0o)?[\da-f_]+mb$`)
-	rGB  = regexp.MustCompile(`(?i)^(?:0b|0x|0o)?[\da-f_]+gb$`)
-	rTB  = regexp.MustCompile(`(?i)^(?:0b|0x|0o)?[\da-f_]+tb$`)
-	empt = regexp.MustCompile(`^[\n\t\r 0.\f\a]*$`)
-)
-
-// bufferParser parses buffer to bytes from different bases and data units
-// size is the buffer in string, rpl act as a replacement for empty buffer.
-// e.g: (--output-file-size-limit "") may override default 32mb with empty buffer,
-// which can be solved by setting rpl by bufferParser(buffer, "32mb")
-func bufferParser(size, rpl string) (buffer int64, err error) {
-	const (
-		_ = 1 << (iota * 10)
-		KB
-		MB
-		GB
-		TB
-	)
-
-	var (
-		lmt = len(size) - 2
-		s   = []byte(size)
-	)
-
-	if empt.Match(s) {
-		size = rpl
-		s = []byte(size)
-	}
-
-	// recover, especially when buffer size overflows int64 i.e ~8019PBs
-	defer func() {
-		if e, ok := recover().(error); ok {
-			err = e.(error)
-		}
-	}()
-
-	switch {
-	case rB.Match(s):
-		buffer, err = strconv.ParseInt(size, 0, 64)
-	case rKB.Match(s):
-		buffer, err = strconv.ParseInt(size[:lmt], 0, 64)
-		buffer *= KB
-	case rMB.Match(s):
-		buffer, err = strconv.ParseInt(size[:lmt], 0, 64)
-		buffer *= MB
-	case rGB.Match(s):
-		buffer, err = strconv.ParseInt(size[:lmt], 0, 64)
-		buffer *= GB
-	case rTB.Match(s):
-		buffer, err = strconv.ParseInt(size[:lmt], 0, 64)
-		buffer *= TB
-	default:
-		return 0, fmt.Errorf("invalid buffer %q", size)
-	}
-	return
-}

settings_test.go

@@ -0,0 +1,14 @@
+package main
+
+import (
+	"encoding/json"
+	"testing"
+)
+
+func TestAppSettings(t *testing.T) {
+	a := AppSettings{}
+	_, err := json.Marshal(&a)
+	if err != nil {
+		t.Error(err)
+	}
+}

size/size.go

@@ -0,0 +1,64 @@
+package size
+
+import (
+	"fmt"
+	"regexp"
+	"strconv"
+)
+
+// Size represents size that implements flag.Var
+type Size int64
+
+// the following regexes follow Go semantics https://golang.org/ref/spec#Letters_and_digits
+var (
+	rB  = regexp.MustCompile(`(?i)^(?:0b|0x|0o)?[\da-f_]+$`)
+	rKB = regexp.MustCompile(`(?i)^(?:0b|0x|0o)?[\da-f_]+kb$`)
+	rMB = regexp.MustCompile(`(?i)^(?:0b|0x|0o)?[\da-f_]+mb$`)
+	rGB = regexp.MustCompile(`(?i)^(?:0b|0x|0o)?[\da-f_]+gb$`)
+	rTB = regexp.MustCompile(`(?i)^(?:0b|0x|0o)?[\da-f_]+tb$`)
+)
+
+// Set parses size to integer from different bases and data units
+func (siz *Size) Set(size string) (err error) {
+	if size == "" {
+		return
+	}
+	const (
+		_ = 1 << (iota * 10)
+		KB
+		MB
+		GB
+		TB
+	)
+
+	var (
+		lmt = len(size) - 2
+		s   = []byte(size)
+	)
+
+	var _len int64
+	switch {
+	case rB.Match(s):
+		_len, err = strconv.ParseInt(size, 0, 64)
+	case rKB.Match(s):
+		_len, err = strconv.ParseInt(size[:lmt], 0, 64)
+		_len *= KB
+	case rMB.Match(s):
+		_len, err = strconv.ParseInt(size[:lmt], 0, 64)
+		_len *= MB
+	case rGB.Match(s):
+		_len, err = strconv.ParseInt(size[:lmt], 0, 64)
+		_len *= GB
+	case rTB.Match(s):
+		_len, err = strconv.ParseInt(size[:lmt], 0, 64)
+		_len *= TB
+	default:
+		return fmt.Errorf("invalid _len %q", size)
+	}
+	*siz = Size(_len)
+	return
+}
+
+func (siz *Size) String() string {
+	return fmt.Sprintf("%d", *siz)
+}

size/size_test.go

@@ -0,0 +1,29 @@
+package size
+
+import "testing"
+
+func TestParseDataUnit(t *testing.T) {
+	var d = map[string]int{
+		"42mb":                 42 << 20,
+		"4_2":                  42,
+		"00":                   0,
+		"0":                    0,
+		"0_600tb":              384 << 40,
+		"0600Tb":               384 << 40,
+		"0o12Mb":               10 << 20,
+		"0b_10010001111_1kb":   2335 << 10,
+		"1024":                 1 << 10,
+		"0b111":                7,
+		"0x12gB":               18 << 30,
+		"0x_67_7a_2f_cc_40_c6": 113774485586118,
+		"121562380192901":      121562380192901,
+	}
+	var buf Size
+	var err error
+	for k, v := range d {
+		err = buf.Set(k)
+		if err != nil || buf != Size(v) {
+			t.Errorf("Error parsing %s: %v", k, err)
+		}
+	}
+}

tcp/doc.go

@@ -0,0 +1,27 @@
+/*
+Package tcp implements TCP transport layer protocol, it is responsible for
+parsing, reassembling tcp packets, handling communication with engine listeners(github.com/buger/goreplay/capture),
+and reporting errors and statistics of packets.
+the packets are parsed by following TCP way(https://en.wikipedia.org/wiki/Transmission_Control_Protocol#TCP_segment_structure).
+
+
+example:
+
+import "github.com/buger/goreplay/tcp"
+
+messageExpire := time.Second*5
+maxSize := 5 << 20
+
+debugger := func(debugLevel int, data ...interface{}){} // debugger can also be nil
+messageHandler := func(mssg *tcp.Message){}
+
+mssgPool := tcp.NewMessageParser(maxMessageSize, messageExpire, debugger, messageHandler)
+listener.Listen(ctx, mssgPool.Handler)
+
+you can use pool.End or/and pool.Start to set custom session behaviors
+
+debugLevel in debugger function indicates the priority of the logs, the bigger the number the lower
+the priority. errors are signified by debug level 4 for errors, 5 for discarded packets, and 6 for received packets.
+
+*/
+package tcp // import github.com/buger/goreplay/tcp

tcp/tcp_message.go

@@ -0,0 +1,332 @@
+package tcp
+
+import (
+	"encoding/binary"
+	"encoding/hex"
+	"fmt"
+	"sort"
+	"time"
+
+	"github.com/buger/goreplay/size"
+)
+
+// Stats every message carry its own stats object
+type Stats struct {
+	LostData  int
+	Length    int       // length of the data
+	Start     time.Time // first packet's timestamp
+	End       time.Time // last packet's timestamp
+	SrcAddr   string
+	DstAddr   string
+	IsRequest bool
+	TimedOut  bool // timeout before getting the whole message
+	Truncated bool // last packet truncated due to max message size
+	IPversion byte
+}
+
+// Message is the representation of a tcp message
+type Message struct {
+	packets  []*Packet
+	parser   *MessageParser
+	feedback interface{}
+	Stats
+}
+
+// UUID returns the UUID of a TCP request and its response.
+func (m *Message) UUID() []byte {
+	var streamID uint64
+	pckt := m.packets[0]
+
+	// check if response or request have generated the ID before.
+	if m.IsRequest {
+		streamID = uint64(pckt.SrcPort)<<48 | uint64(pckt.DstPort)<<32 |
+			uint64(ip2int(pckt.SrcIP))
+	} else {
+		streamID = uint64(pckt.DstPort)<<48 | uint64(pckt.SrcPort)<<32 |
+			uint64(ip2int(pckt.DstIP))
+	}
+
+	id := make([]byte, 12)
+	binary.BigEndian.PutUint64(id, streamID)
+
+	if m.IsRequest {
+		binary.BigEndian.PutUint32(id[8:], pckt.Ack)
+	} else {
+		binary.BigEndian.PutUint32(id[8:], pckt.Seq)
+	}
+
+	uuidHex := make([]byte, 24)
+	hex.Encode(uuidHex[:], id[:])
+
+	return uuidHex
+}
+
+func (m *Message) add(packet *Packet) {
+	// fmt.Println("SEQ:", packet.Seq, " - ", len(packet.Payload))
+
+	// Skip duplicates
+	for _, p := range m.packets {
+		if p.Seq == packet.Seq {
+			return
+		}
+	}
+
+	// Packets not always captured in same Seq order, and sometimes we need to prepend
+	if len(m.packets) == 0 || packet.Seq > m.packets[len(m.packets)-1].Seq {
+		m.packets = append(m.packets, packet)
+	} else if packet.Seq < m.packets[0].Seq {
+		m.packets = append([]*Packet{packet}, m.packets...)
+	} else { // insert somewhere in the middle...
+		for i, p := range m.packets {
+			if packet.Seq < p.Seq {
+				m.packets = append(m.packets[:i], append([]*Packet{packet}, m.packets[i:]...)...)
+				break
+			}
+		}
+	}
+
+	m.Length += len(packet.Payload)
+	m.LostData += int(packet.Lost)
+
+	if packet.Timestamp.After(m.End) || m.End.IsZero() {
+		m.End = packet.Timestamp
+	}
+}
+
+// Packets returns packets of the message
+func (m *Message) Packets() []*Packet {
+	return m.packets
+}
+
+func (m *Message) MissingChunk() bool {
+	nextSeq := m.packets[0].Seq
+
+	for _, p := range m.packets {
+		if p.Seq != nextSeq {
+			return true
+		}
+
+		nextSeq += uint32(len(p.Payload))
+	}
+
+	return false
+}
+
+func (m *Message) PacketData() [][]byte {
+	var totalLen int
+	for _, p := range m.packets {
+		totalLen += len(p.Payload)
+	}
+	tmp := make([][]byte, totalLen)
+
+	for i, p := range m.packets {
+		tmp[i] = p.Payload
+	}
+
+	return tmp
+}
+
+// Data returns data in this message
+func (m *Message) Data() []byte {
+	var totalLen int
+	for _, p := range m.packets {
+		totalLen += len(p.Payload)
+	}
+	tmp := make([]byte, totalLen)
+
+	var i int
+	for _, p := range m.packets {
+		i += copy(tmp[i:], p.Payload)
+	}
+
+	return tmp
+}
+
+// SetProtocolState set feedback/data that can be used later, e.g with End or Start hint
+func (m *Message) SetProtocolState(feedback interface{}) {
+	m.feedback = feedback
+}
+
+// ProtocolState returns feedback associated to this message
+func (m *Message) ProtocolState() interface{} {
+	return m.feedback
+}
+
+// Sort a helper to sort packets
+func (m *Message) Sort() {
+	sort.SliceStable(m.packets, func(i, j int) bool { return m.packets[i].Seq < m.packets[j].Seq })
+}
+
+func (m *Message) Finalize() {
+	// Allow re-use memory
+	for _, p := range m.packets {
+		packetPool.Put(p)
+	}
+}
+
+// Emitter message handler
+type Emitter func(*Message)
+
+// Debugger is the debugger function. first params is the indicator of the issue's priority
+// the higher the number, the lower the priority. it can be 4 <= level <= 6.
+type Debugger func(int, ...interface{})
+
+// HintEnd hints the parser to stop the session, see MessageParser.End
+// when set, it will be executed before checking FIN or RST flag
+type HintEnd func(*Message) bool
+
+// HintStart hints the parser to start the reassembling the message, see MessageParser.Start
+// when set, it will be called after checking SYN flag
+type HintStart func(*Packet) (IsRequest, IsOutgoing bool)
+
+// MessageParser holds data of all tcp messages in progress(still receiving/sending packets).
+// message is identified by its source port and dst port, and last 4bytes of src IP.
+type MessageParser struct {
+	debug         Debugger
+	maxSize       size.Size // maximum message size, default 5mb
+	m             map[uint64]*Message
+	emit          Emitter
+	messageExpire time.Duration // the maximum time to wait for the final packet, minimum is 100ms
+	End           HintEnd
+	Start         HintStart
+	ticker        *time.Ticker
+	packets       chan *Packet
+	msgs          int32         // messages in the parser
+	close         chan struct{} // to signal that we are able to close
+}
+
+// NewMessageParser returns a new instance of message parser
+func NewMessageParser(maxSize size.Size, messageExpire time.Duration, debugger Debugger, emitHandler Emitter) (parser *MessageParser) {
+	parser = new(MessageParser)
+	parser.debug = debugger
+	parser.emit = emitHandler
+	parser.messageExpire = time.Millisecond * 100
+	if parser.messageExpire < messageExpire {
+		parser.messageExpire = messageExpire
+	}
+	parser.maxSize = maxSize
+	if parser.maxSize < 1 {
+		parser.maxSize = 5 << 20
+	}
+	parser.packets = make(chan *Packet, 1000)
+	parser.m = make(map[uint64]*Message)
+	parser.ticker = time.NewTicker(time.Millisecond * 50)
+	parser.close = make(chan struct{}, 1)
+	go parser.wait()
+	return parser
+}
+
+var totalCounter int
+
+// Packet returns packet handler
+func (parser *MessageParser) PacketHandler(packet *Packet) {
+	parser.packets <- packet
+
+	totalCounter++
+
+	if totalCounter%10000 == 0 {
+		fmt.Println(totalCounter, len(parser.packets))
+	}
+}
+
+func (parser *MessageParser) wait() {
+	var (
+		pckt *Packet
+		now  time.Time
+	)
+	for {
+		select {
+		case pckt = <-parser.packets:
+			parser.processPacket(pckt)
+		case now = <-parser.ticker.C:
+			parser.timer(now)
+		case <-parser.close:
+			parser.ticker.Stop()
+			// parser.Close should wait for this function to return
+			parser.close <- struct{}{}
+			return
+		}
+	}
+}
+
+func (parser *MessageParser) processPacket(pckt *Packet) {
+	var in, out bool
+
+	// Trying to build unique hash, but there is small chance of collision
+	// No matter if it is request or response, all packets in the same message have same
+	m, ok := parser.m[pckt.MessageID()]
+	switch {
+	case ok:
+		parser.addPacket(m, pckt)
+		return
+	case parser.Start != nil:
+		if in, out = parser.Start(pckt); !(in || out) {
+			// Packet can be received out of order, so give it another chance
+			if pckt.Retry < 1 && len(pckt.Payload) > 0 {
+				// Requeue not known packets
+				pckt.Retry++
+
+				select {
+				case parser.packets <- pckt:
+				default:
+					packetPool.Put(pckt)
+					// fmt.Println("Skipping packet")
+				}
+			}
+			return
+		}
+	}
+
+	m = new(Message)
+	m.IsRequest = in
+	parser.m[pckt.MessageID()] = m
+	m.Start = pckt.Timestamp
+	m.parser = parser
+	parser.addPacket(m, pckt)
+}
+
+func (parser *MessageParser) addPacket(m *Message, pckt *Packet) {
+	trunc := m.Length + len(pckt.Payload) - int(parser.maxSize)
+	if trunc > 0 {
+		m.Truncated = true
+		pckt.Payload = pckt.Payload[:int(parser.maxSize)-m.Length]
+	}
+	m.add(pckt)
+	switch {
+	// if one of this cases matches, we dispatch the message
+	case trunc >= 0:
+	case parser.End != nil && parser.End(m):
+	default:
+		// continue to receive packets
+		return
+	}
+
+	parser.Emit(m)
+}
+
+func (parser *MessageParser) Emit(m *Message) {
+	delete(parser.m, m.packets[0].MessageID())
+	parser.emit(m)
+}
+
+func (parser *MessageParser) timer(now time.Time) {
+	for _, m := range parser.m {
+		if now.Sub(m.End) > parser.messageExpire {
+			m.TimedOut = true
+			parser.Emit(m)
+		}
+	}
+}
+
+// this function should not block other parser operations
+func (parser *MessageParser) Debug(level int, args ...interface{}) {
+	if parser.debug != nil {
+		parser.debug(level, args...)
+	}
+}
+
+func (parser *MessageParser) Close() error {
+	parser.close <- struct{}{}
+	<-parser.close // wait for timer to be closed!
+	return nil
+}

tcp/tcp_packet.go

@@ -0,0 +1,218 @@
+package tcp
+
+import (
+	"encoding/binary"
+	"fmt"
+	"net"
+	"sync"
+	"time"
+
+	"github.com/google/gopacket"
+)
+
+func copySlice(b, a []byte) []byte {
+	if cap(b) < len(a) {
+		b = make([]byte, len(a))
+	}
+	copy(b, a)
+	return b[:len(a)]
+}
+
+var packetPool = sync.Pool{
+	New: func() interface{} {
+		return new(Packet)
+	},
+}
+
+/*
+Packet represent data and layers of packet.
+parser extracts information from pcap Packet. functions of *Packet doesn't validate if packet is nil,
+calllers must make sure that ParsePacket has'nt returned any error before calling any other
+function.
+*/
+type Packet struct {
+	messageID          uint64
+	SrcIP, DstIP       net.IP
+	Version            uint8
+	SrcPort, DstPort   uint16
+	Ack, Seq           uint32
+	ACK, SYN, FIN, RST bool
+	Lost               uint32
+	Retry              int
+	Timestamp          time.Time
+	Payload            []byte
+}
+
+// ParsePacket parse raw packets
+func ParsePacket(data []byte, lType, lTypeLen int, cp *gopacket.CaptureInfo) (pckt *Packet, err error) {
+	pckt = packetPool.Get().(*Packet)
+	pckt.Retry = 0
+	pckt.messageID = 0
+
+	// TODO: check resolution
+	pckt.Timestamp = cp.Timestamp
+
+	if len(data) < lTypeLen {
+		return nil, ErrHdrLength("Link")
+	}
+	if len(data) <= lTypeLen {
+		return nil, ErrHdrMissing("IPv4 or IPv6")
+	}
+
+	ldata := data[lTypeLen:]
+	var proto byte
+	var netLayer, transLayer []byte
+
+	if ldata[0]>>4 == 4 {
+		// IPv4 header
+		if len(ldata) < 20 {
+			return nil, ErrHdrLength("IPv4")
+		}
+		proto = ldata[9]
+		ihl := int(ldata[0]&0x0F) * 4
+		if ihl < 20 {
+			return nil, ErrHdrInvalid("IPv4's IHL")
+		}
+		if len(ldata) < ihl {
+			return nil, ErrHdrLength("IPv4 opts")
+		}
+		netLayer = ldata[:ihl]
+	} else if ldata[0]>>4 == 6 {
+		if len(ldata) < 40 {
+			return nil, ErrHdrLength("IPv6")
+		}
+		proto = ldata[6]
+		totalLen := 40
+		for ipv6ExtensionHdr(proto) {
+			hdr := len(ldata) - totalLen
+			if hdr < 8 {
+				return nil, ErrHdrExpected("IPv6 opts")
+			}
+			extLen := 8
+			if proto != 44 {
+				extLen = int(ldata[totalLen+1]+1) * 8
+			}
+			if hdr < extLen {
+				return nil, ErrHdrLength("IPv6 opts")
+			}
+			proto = ldata[totalLen]
+			totalLen += extLen
+		}
+		netLayer = ldata[:totalLen]
+	} else {
+		return nil, ErrHdrExpected("IPv4 or IPv6")
+	}
+	if proto != 6 {
+		return nil, ErrHdrExpected("TCP")
+	}
+	if len(data) <= len(netLayer) {
+		return nil, ErrHdrMissing("TCP")
+	}
+	ndata := ldata[len(netLayer):]
+	// TCP header
+	if len(ndata) < 20 {
+		return nil, ErrHdrLength("TCP")
+	}
+	dOf := int(ndata[12]>>4) * 4
+	if dOf < 20 {
+		return nil, ErrHdrInvalid("TCP's ndata offset")
+	}
+	if len(ndata) < dOf {
+		return nil, ErrHdrLength("TCP opts")
+	}
+
+	if len(ndata[dOf:]) == 0 {
+		return nil, fmt.Errorf("Packet without Data")
+	}
+
+	if (netLayer[0] >> 4) == 4 {
+		// IPv4 header
+		pckt.Version = 4
+		pckt.SrcIP = netLayer[12:16]
+		pckt.DstIP = netLayer[16:20]
+	} else {
+		// IPv6 header
+		pckt.Version = 6
+		pckt.SrcIP = netLayer[8:24]
+		pckt.DstIP = netLayer[24:40]
+	}
+
+	transLayer = ndata[:dOf]
+
+	pckt.SrcPort = binary.BigEndian.Uint16(transLayer[0:2])
+	pckt.DstPort = binary.BigEndian.Uint16(transLayer[2:4])
+	pckt.Seq = binary.BigEndian.Uint32(transLayer[4:8])
+	pckt.Ack = binary.BigEndian.Uint32(transLayer[8:12])
+	pckt.FIN = transLayer[13]&0x01 != 0
+	pckt.SYN = transLayer[13]&0x02 != 0
+	pckt.RST = transLayer[13]&0x04 != 0
+	pckt.ACK = transLayer[13]&0x10 != 0
+	pckt.Lost = uint32(cp.Length - cp.CaptureLength)
+	pckt.Payload = copySlice(pckt.Payload, ndata[dOf:])
+	return
+}
+
+func (pckt *Packet) MessageID() uint64 {
+	if pckt.messageID == 0 {
+		// All packets in the same message will share the same ID
+		pckt.messageID = uint64(pckt.SrcPort)<<48 | uint64(pckt.DstPort)<<32 |
+			(uint64(ip2int(pckt.SrcIP)) + uint64(ip2int(pckt.DstIP)) + uint64(pckt.Ack))
+	}
+
+	return pckt.messageID
+}
+
+// Src returns the source socket of a packet
+func (pckt *Packet) Src() string {
+	return fmt.Sprintf("%s:%d", pckt.SrcIP, pckt.SrcPort)
+}
+
+// Dst returns destination socket
+func (pckt *Packet) Dst() string {
+	return fmt.Sprintf("%s:%d", pckt.DstIP, pckt.DstPort)
+}
+
+// ErrHdrLength returned on short header length
+type ErrHdrLength string
+
+func (err ErrHdrLength) Error() string {
+	return "short " + string(err) + " length"
+}
+
+// ErrHdrMissing returned on missing header(s)
+type ErrHdrMissing string
+
+func (err ErrHdrMissing) Error() string {
+	return "missing " + string(err) + " header(s)"
+}
+
+// ErrHdrExpected returned when header(s) are different from the one expected
+type ErrHdrExpected string
+
+func (err ErrHdrExpected) Error() string {
+	return "expected " + string(err) + " header(s)"
+}
+
+// ErrHdrInvalid returned when header(s) are different from the one expected
+type ErrHdrInvalid string
+
+func (err ErrHdrInvalid) Error() string {
+	return "invalid " + string(err) + " value"
+}
+
+// https://en.wikipedia.org/wiki/IPv6_packet#Extension_headers
+func ipv6ExtensionHdr(b byte) bool {
+	// TODO: support all extension headers
+	return b == 0 || b == 43 || b == 44
+}
+
+func ip2int(ip net.IP) uint32 {
+	if len(ip) == 0 {
+		return 0
+	}
+
+	if len(ip) == 16 {
+		return binary.BigEndian.Uint32(ip[12:16])
+	}
+	return binary.BigEndian.Uint32(ip)
+}

tcp/tcp_test.go

@@ -0,0 +1,385 @@
+package tcp
+
+import (
+	"bytes"
+	"encoding/binary"
+
+	// "runtime"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/buger/goreplay/proto"
+	"github.com/google/gopacket"
+	"github.com/google/gopacket/layers"
+)
+
+func generateHeader(request bool, seq uint32, length uint16) []byte {
+	hdr := make([]byte, 4+24+24)
+	binary.BigEndian.PutUint32(hdr, uint32(layers.ProtocolFamilyIPv4))
+
+	ip := hdr[4:]
+	ip[0] = 4<<4 | 6
+	binary.BigEndian.PutUint16(ip[2:4], length+24+24)
+	ip[9] = uint8(layers.IPProtocolTCP)
+	copy(ip[12:16], []byte{127, 0, 0, 1})
+	copy(ip[16:], []byte{127, 0, 0, 1})
+
+	// set tcp header
+	tcp := ip[24:]
+	tcp[12] = 6 << 4
+
+	if request {
+		binary.BigEndian.PutUint16(tcp, 5535)
+		binary.BigEndian.PutUint16(tcp[2:], 8000)
+	} else {
+		binary.BigEndian.PutUint16(tcp, 8000)
+		binary.BigEndian.PutUint16(tcp[2:], 5535)
+	}
+	binary.BigEndian.PutUint32(tcp[4:], seq)
+	return hdr
+}
+
+func GetPackets(request bool, start uint32, _len int, payload []byte) []*Packet {
+	var packets = make([]*Packet, _len)
+	for i := start; i < start+uint32(_len); i++ {
+		d := append(generateHeader(request, i, uint16(len(payload))), payload...)
+		ci := &gopacket.CaptureInfo{Length: len(d), CaptureLength: len(d), Timestamp: time.Now()}
+
+		if len(payload) > 0 {
+			packets[i-start], _ = ParsePacket(d, int(layers.LinkTypeLoop), 4, ci)
+		} else {
+			packets[i-start] = new(Packet)
+		}
+	}
+	return packets
+}
+
+func TestRequestResponseMapping(t *testing.T) {
+	packets := []*Packet{
+		{SrcPort: 60000, DstPort: 80, Ack: 1, Seq: 1, Timestamp: time.Unix(1, 0), Payload: []byte("GET / HTTP/1.1\r\n")},
+		{SrcPort: 60000, DstPort: 80, Ack: 1, Seq: 17, Timestamp: time.Unix(2, 0), Payload: []byte("Host: localhost\r\n\r\n")},
+
+		// Seq of first response packet match Ack of first request packet
+		{SrcPort: 80, DstPort: 60000, Ack: 36, Seq: 1, Timestamp: time.Unix(3, 0), Payload: []byte("HTTP/1.1 200 OK\r\n")},
+		{SrcPort: 80, DstPort: 60000, Ack: 36, Seq: 18, Timestamp: time.Unix(4, 0), Payload: []byte("Content-Length: 0\r\n\r\n")},
+
+		// Same TCP stream
+		{SrcPort: 60000, DstPort: 80, Ack: 39, Seq: 36, Timestamp: time.Unix(5, 0), Payload: []byte("GET / HTTP/1.1\r\n")},
+		{SrcPort: 60000, DstPort: 80, Ack: 39, Seq: 52, Timestamp: time.Unix(6, 0), Payload: []byte("Host: localhost\r\n\r\n")},
+
+		// Seq of first response packet match Ack of first request packet
+		{SrcPort: 80, DstPort: 60000, Ack: 71, Seq: 39, Timestamp: time.Unix(7, 0), Payload: []byte("HTTP/1.1 200 OK\r\n")},
+		{SrcPort: 80, DstPort: 60000, Ack: 71, Seq: 56, Timestamp: time.Unix(8, 0), Payload: []byte("Content-Length: 0\r\n\r\n")},
+	}
+
+	var mssg = make(chan *Message, 4)
+	parser := NewMessageParser(1<<20, time.Second, nil, func(m *Message) { mssg <- m })
+	parser.Start = func(pckt *Packet) (bool, bool) {
+		return proto.HasRequestTitle(pckt.Payload), proto.HasResponseTitle(pckt.Payload)
+	}
+	parser.End = func(m *Message) bool {
+		return proto.HasFullPayload(m, m.Data())
+	}
+
+	for _, packet := range packets {
+		parser.PacketHandler(packet)
+	}
+
+	messages := []*Message{}
+	for i := 0; i < 4; i++ {
+		select {
+		case <-time.After(time.Second):
+			t.Errorf("can't parse packets fast enough")
+			return
+		case m := <-mssg:
+			messages = append(messages, m)
+		}
+	}
+
+	assert.Equal(t, messages[0].IsRequest, true)
+	assert.Equal(t, messages[1].IsRequest, false)
+	assert.Equal(t, messages[2].IsRequest, true)
+	assert.Equal(t, messages[3].IsRequest, false)
+
+	assert.Equal(t, messages[0].UUID(), messages[1].UUID())
+	assert.Equal(t, messages[2].UUID(), messages[3].UUID())
+
+	assert.NotEqual(t, messages[0].UUID(), messages[2].UUID())
+}
+
+func TestMessageParserWithHint(t *testing.T) {
+	var mssg = make(chan *Message, 3)
+	parser := NewMessageParser(1<<20, time.Second, nil, func(m *Message) { mssg <- m })
+	parser.Start = func(pckt *Packet) (bool, bool) {
+		return proto.HasRequestTitle(pckt.Payload), proto.HasResponseTitle(pckt.Payload)
+	}
+	parser.End = func(m *Message) bool {
+		return proto.HasFullPayload(m, m.Data())
+	}
+	packets := GetPackets(true, 1, 30, nil)
+	packets[4] = GetPackets(false, 4, 1, []byte("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nTransfer-Encoding: chunked\r\n\r\n7"))[0]
+	packets[5] = GetPackets(false, 5, 1, []byte("\r\nMozilla\r\n9\r\nDeveloper\r"))[0]
+	packets[6] = GetPackets(false, 6, 1, []byte("\n7\r\nNetwork\r\n0\r\n\r\n"))[0]
+	packets[14] = GetPackets(true, 14, 1, []byte("POST / HTTP/1.1\r\nContent-Type: text/plain\r\nContent-Length: 23\r\n\r\n"))[0]
+	packets[15] = GetPackets(true, 15, 1, []byte("MozillaDeveloper"))[0]
+	packets[16] = GetPackets(true, 16, 1, []byte("Network"))[0]
+	packets[24] = GetPackets(true, 24, 1, []byte("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nContent-Length: 0\r\n\r\n"))[0]
+
+	for i := 0; i < 30; i++ {
+		parser.PacketHandler(packets[i])
+	}
+
+	messages := []*Message{}
+	for i := 0; i < 3; i++ {
+		select {
+		case <-time.After(time.Second):
+			t.Errorf("can't parse packets fast enough")
+			return
+		case m := <-mssg:
+			messages = append(messages, m)
+		}
+	}
+
+	if !bytes.HasSuffix(messages[0].Data(), []byte("\n7\r\nNetwork\r\n0\r\n\r\n")) {
+		t.Errorf("expected to %q to have suffix %q", messages[0].Data(), []byte("\n7\r\nNetwork\r\n0\r\n\r\n"))
+	}
+
+	if !bytes.HasSuffix(messages[1].Data(), []byte("Network")) {
+		t.Errorf("expected to %q to have suffix %q", messages[1].Data(), []byte("Network"))
+	}
+
+	if !bytes.HasSuffix(messages[2].Data(), []byte("Content-Length: 0\r\n\r\n")) {
+		t.Errorf("expected to %q to have suffix %q", messages[2].Data(), []byte("Content-Length: 0\r\n\r\n"))
+	}
+}
+
+func TestMessageParserWrongOrder(t *testing.T) {
+	var mssg = make(chan *Message, 3)
+	parser := NewMessageParser(1<<20, time.Second, nil, func(m *Message) { mssg <- m })
+	parser.Start = func(pckt *Packet) (bool, bool) {
+		return proto.HasRequestTitle(pckt.Payload), proto.HasResponseTitle(pckt.Payload)
+	}
+	parser.End = func(m *Message) bool {
+		return proto.HasFullPayload(m, m.Data())
+	}
+	packets := GetPackets(true, 1, 30, nil)
+	packets[6] = GetPackets(false, 4, 1, []byte("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nTransfer-Encoding: chunked\r\n\r\n7"))[0]
+	packets[5] = GetPackets(false, 5, 1, []byte("\r\nMozilla\r\n9\r\nDeveloper\r"))[0]
+	packets[4] = GetPackets(false, 6, 1, []byte("\n7\r\nNetwork\r\n0\r\n\r\n"))[0]
+	// Duplicate with same seq
+	packets[7] = GetPackets(false, 6, 1, []byte("\n7\r\nNetwork\r\n0\r\n\r\n"))[0]
+
+	packets[16] = GetPackets(true, 14, 1, []byte("POST / HTTP/1.1\r\nContent-Type: text/plain\r\nContent-Length: 23\r\n\r\n"))[0]
+	packets[15] = GetPackets(true, 15, 1, []byte("MozillaDeveloper"))[0]
+	packets[14] = GetPackets(true, 16, 1, []byte("Network"))[0]
+
+	for i := 0; i < 30; i++ {
+		parser.PacketHandler(packets[i])
+	}
+	var m *Message
+	select {
+	case <-time.After(time.Second):
+		t.Errorf("can't parse packets fast enough")
+		return
+	case m = <-mssg:
+	}
+	if !bytes.HasSuffix(m.Data(), []byte("\n7\r\nNetwork\r\n0\r\n\r\n")) {
+		t.Errorf("expected to %q to have suffix %q", m.Data(), []byte("\n7\r\nNetwork\r\n0\r\n\r\n"))
+	}
+
+	select {
+	case <-time.After(time.Second):
+		t.Errorf("can't parse packets fast enough")
+		return
+	case m = <-mssg:
+	}
+	if !bytes.HasSuffix(m.Data(), []byte("Network")) {
+		t.Errorf("expected to %q to have suffix %q", m.Data(), []byte("Network"))
+	}
+}
+
+func TestMessageParserWithoutHint(t *testing.T) {
+	var mssg = make(chan *Message, 1)
+	var data [63 << 10]byte
+	packets := GetPackets(true, 1, 10, data[:])
+
+	p := NewMessageParser(63<<10*10, time.Second, nil, func(m *Message) { mssg <- m })
+	for _, v := range packets {
+		p.PacketHandler(v)
+	}
+	var m *Message
+	select {
+	case <-time.After(time.Second):
+		t.Errorf("can't parse packets fast enough")
+		return
+	case m = <-mssg:
+	}
+	if m.Length != 63<<10*10 {
+		t.Errorf("expected %d to equal %d", m.Length, 63<<10*10)
+	}
+}
+
+func TestMessageMaxSizeReached(t *testing.T) {
+	var mssg = make(chan *Message, 2)
+	var data [63 << 10]byte
+	packets := GetPackets(true, 1, 2, data[:])
+	packets = append(packets, GetPackets(true, 1, 1, make([]byte, 63<<10+10))...)
+
+	p := NewMessageParser(63<<10+10, time.Second, nil, func(m *Message) { mssg <- m })
+	for _, v := range packets {
+		p.PacketHandler(v)
+	}
+	var m *Message
+	select {
+	case <-time.After(time.Second):
+		t.Errorf("can't parse packets fast enough")
+		return
+	case m = <-mssg:
+	}
+	if m.Length != 63<<10+10 {
+		t.Errorf("expected %d to equal %d", m.Length, 63<<10+10)
+	}
+	if !m.Truncated {
+		t.Error("expected message to be truncated")
+	}
+
+	select {
+	case <-time.After(time.Second):
+		t.Errorf("can't parse packets fast enough")
+		return
+	case m = <-mssg:
+	}
+	if m.Length != 63<<10+10 {
+		t.Errorf("expected %d to equal %d", m.Length, 63<<10+10)
+	}
+	if m.Truncated {
+		t.Error("expected message to not be truncated")
+	}
+}
+
+func TestMessageTimeoutReached(t *testing.T) {
+	var mssg = make(chan *Message, 2)
+	var data [63 << 10]byte
+	packets := GetPackets(true, 1, 2, data[:])
+	p := NewMessageParser(1<<20, 0, nil, func(m *Message) { mssg <- m })
+	p.PacketHandler(packets[0])
+	time.Sleep(time.Millisecond * 400)
+	p.PacketHandler(packets[1])
+	m := <-mssg
+	if m.Length != 63<<10 {
+		t.Errorf("expected %d to equal %d", m.Length, 63<<10)
+	}
+	if !m.TimedOut {
+		t.Error("expected message to be timeout")
+	}
+}
+
+func TestMessageUUID(t *testing.T) {
+	packets := GetPackets(true, 1, 10, nil)
+
+	var uuid, uuid1 []byte
+	parser := NewMessageParser(0, 0, nil, func(msg *Message) {
+		if len(uuid) == 0 {
+			uuid = msg.UUID()
+			return
+		}
+		uuid1 = msg.UUID()
+	})
+
+	for _, p := range packets {
+		parser.PacketHandler(p)
+	}
+
+	if string(uuid) != string(uuid1) {
+		t.Errorf("expected %s, to equal %s", uuid, uuid1)
+	}
+}
+
+func BenchmarkMessageUUID(b *testing.B) {
+	packets := GetPackets(true, 1, 5, nil)
+
+	var uuid []byte
+	var msg *Message
+	parser := NewMessageParser(0, 0, nil, func(m *Message) {
+		msg = m
+	})
+	for _, p := range packets {
+		parser.PacketHandler(p)
+	}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		uuid = msg.UUID()
+	}
+	_ = uuid
+}
+
+func BenchmarkPacketParseAndSort(b *testing.B) {
+	m := new(Message)
+	m.packets = make([]*Packet, 100)
+	for i, v := range GetPackets(true, 1, 100, nil) {
+		m.packets[i] = v
+	}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		m.Sort()
+	}
+}
+
+func BenchmarkMessageParserWithoutHint(b *testing.B) {
+	// runtime.GOMAXPROCS(8)
+	var mssg = make(chan *Message, 1)
+	var chunk = []byte("111111111111111111111111111111")
+	packets := GetPackets(true, 1, 1000, chunk)
+	p := NewMessageParser(1<<20, time.Second*2, nil, func(m *Message) {
+		mssg <- m
+	})
+	b.ResetTimer()
+	b.ReportMetric(float64(1000), "packets/op")
+	for i := 0; i < b.N; i++ {
+		for _, v := range packets {
+			p.PacketHandler(v)
+		}
+		<-mssg
+	}
+}
+
+func BenchmarkMessageParserWithHint(b *testing.B) {
+	var buf [1002][]byte
+	var chunk = []byte("1e\r\n111111111111111111111111111111\r\n")
+	buf[0] = []byte("HTTP/1.1 200 OK\r\nContent-Type: text/plain\r\nTransfer-Encoding: chunked\r\n\r\n")
+	for i := 1; i < 1000; i++ {
+		buf[i] = chunk
+	}
+	buf[1001] = []byte("0\r\n\r\n")
+	packets := make([]*Packet, len(buf))
+	for i := 0; i < len(buf); i++ {
+		packets[i] = GetPackets(false, 1, 1, buf[i])[0]
+	}
+	var mssg = make(chan *Message, 1)
+	parser := NewMessageParser(1<<30, time.Second*10, nil, func(m *Message) { mssg <- m })
+	parser.Start = func(pckt *Packet) (bool, bool) {
+		return false, proto.HasResponseTitle(pckt.Payload)
+	}
+	parser.End = func(m *Message) bool {
+		return proto.HasFullPayload(m, m.Data())
+	}
+	b.ResetTimer()
+	b.ReportMetric(float64(len(packets)), "packets/op")
+	b.ReportMetric(float64(1000), "chunks/op")
+	for i := 0; i < b.N; i++ {
+		for j := range packets {
+			parser.PacketHandler(packets[j])
+		}
+		<-mssg
+	}
+}
+
+func BenchmarkNewAndParsePacket(b *testing.B) {
+	data := append(generateHeader(true, 1024, 10), make([]byte, 10)...)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		ParsePacket(data, int(layers.LinkTypeLoop), 4, &gopacket.CaptureInfo{})
+	}
+}

tcp_client.go

@@ -3,7 +3,6 @@ package main
 import (
 	"crypto/tls"
 	"io"
-	"log"
 	"net"
 	"runtime/debug"
 	"syscall"
@@ -71,7 +70,7 @@ func (c *TCPClient) Disconnect() {
 	if c.conn != nil {
 		c.conn.Close()
 		c.conn = nil
-		Debug("[TCPClient] Disconnected: ", c.baseURL)
+		Debug(1, "[TCPClient] Disconnected: ", c.baseURL)
 	}
 }
 
@@ -85,12 +84,10 @@ func (c *TCPClient) isAlive() bool {
 	if err == nil {
 		return true
 	} else if err == io.EOF {
-		if c.config.Debug {
-			Debug("[TCPClient] connection closed, reconnecting")
-		}
+		Debug(1, "[TCPClient] connection closed, reconnecting")
 		return false
 	} else if err == syscall.EPIPE {
-		Debug("Detected broken pipe.", err)
+		Debug(1, "Detected broken pipe.", err)
 		return false
 	}
 
@@ -102,19 +99,19 @@ func (c *TCPClient) Send(data []byte) (response []byte, err error) {
 	// Don't exit on panic
 	defer func() {
 		if r := recover(); r != nil {
-			Debug("[TCPClient]", r, string(data))
+			Debug(1, "[TCPClient]", r, string(data))
 
 			if _, ok := r.(error); !ok {
-				log.Println("[TCPClient] Failed to send request: ", string(data))
-				log.Println("PANIC: pkg:", r, debug.Stack())
+				Debug(1, "[TCPClient] Failed to send request: ", string(data))
+				Debug(1, "PANIC: pkg:", r, debug.Stack())
 			}
 		}
 	}()
 
 	if c.conn == nil || !c.isAlive() {
-		Debug("[TCPClient] Connecting:", c.baseURL)
+		Debug(1, "[TCPClient] Connecting:", c.baseURL)
 		if err = c.Connect(); err != nil {
-			log.Println("[TCPClient] Connection error:", err)
+			Debug(1, "[TCPClient] Connection error:", err)
 			return
 		}
 	}
@@ -124,11 +121,11 @@ func (c *TCPClient) Send(data []byte) (response []byte, err error) {
 	c.conn.SetWriteDeadline(timeout)
 
 	if c.config.Debug {
-		Debug("[TCPClient] Sending:", string(data))
+		Debug(1, "[TCPClient] Sending:", string(data))
 	}
 
 	if _, err = c.conn.Write(data); err != nil {
-		Debug("[TCPClient] Write error:", err, c.baseURL)
+		Debug(1, "[TCPClient] Write error:", err, c.baseURL)
 		return
 	}
 
@@ -159,7 +156,7 @@ func (c *TCPClient) Send(data []byte) (response []byte, err error) {
 			if err == io.EOF {
 				break
 			} else if err != nil {
-				Debug("[TCPClient] Read the whole body error:", err, c.baseURL)
+				Debug(1, "[TCPClient] Read the whole body error:", err, c.baseURL)
 				break
 			}
 
@@ -167,7 +164,7 @@ func (c *TCPClient) Send(data []byte) (response []byte, err error) {
 		}
 
 		if readBytes >= maxResponseSize {
-			Debug("[TCPClient] Body is more than the max size", maxResponseSize,
+			Debug(1, "[TCPClient] Body is more than the max size", maxResponseSize,
 				c.baseURL)
 			break
 		}
@@ -177,7 +174,7 @@ func (c *TCPClient) Send(data []byte) (response []byte, err error) {
 	}
 
 	if err != nil {
-		Debug("[TCPClient] Response read error", err, c.conn, readBytes)
+		Debug(1, "[TCPClient] Response read error", err, c.conn, readBytes)
 		return
 	}
 
@@ -189,7 +186,7 @@ func (c *TCPClient) Send(data []byte) (response []byte, err error) {
 	copy(payload, c.respBuf[:readBytes])
 
 	if c.config.Debug {
-		Debug("[TCPClient] Received:", string(payload))
+		Debug(1, "[TCPClient] Received:", string(payload))
 	}
 
 	return payload, err

test_input.go

@@ -1,10 +1,9 @@
 package main
 
 import (
-	"crypto/rand"
 	"encoding/base64"
 	"errors"
-	"fmt"
+	"math/rand"
 	"time"
 )
 
@@ -26,30 +25,31 @@ func NewTestInput() (i *TestInput) {
 	return
 }
 
-func (i *TestInput) Read(data []byte) (int, error) {
+// PluginRead reads message from this plugin
+func (i *TestInput) PluginRead() (*Message, error) {
+	var msg Message
 	select {
 	case buf := <-i.data:
-		var header []byte
-
+		msg.Data = buf
 		if !i.skipHeader {
-			header = payloadHeader(RequestPayload, uuid(), time.Now().UnixNano(), -1)
-			copy(data[0:len(header)], header)
-			copy(data[len(header):], buf)
+			msg.Meta = payloadHeader(RequestPayload, uuid(), time.Now().UnixNano(), -1)
 		} else {
-			copy(data, buf)
+			msg.Meta, msg.Data = payloadMetaWithBody(msg.Data)
 		}
 
-		return len(buf) + len(header), nil
-	case <-time.After(10 * time.Second):
-		return 0, fmt.Errorf("timed out waiting for read")
+		return &msg, nil
+	case <-i.stop:
+		return nil, ErrorStopped
 	}
 }
 
+// Close closes this plugin
 func (i *TestInput) Close() error {
 	close(i.stop)
 	return nil
 }
 
+// EmitBytes sends data
 func (i *TestInput) EmitBytes(data []byte) {
 	i.data <- data
 }
@@ -77,8 +77,7 @@ func (i *TestInput) EmitLargePOST() {
 
 	rs := base64.URLEncoding.EncodeToString(rb)
 
-	i.data <- []byte("POST / HTTP/1.1\nHost: www.w3.org\nContent-Length:5242880\r\n\r\n" + rs)
-	Debug("Sent large POST")
+	i.data <- []byte("POST / HTTP/1.1\r\nHost: www.w3.org\nContent-Length:5242880\r\n\r\n" + rs)
 }
 
 // EmitSizedPOST emit a POST with a payload set to a supplied size
@@ -88,13 +87,12 @@ func (i *TestInput) EmitSizedPOST(payloadSize int) {
 
 	rs := base64.URLEncoding.EncodeToString(rb)
 
-	i.data <- []byte("POST / HTTP/1.1\nHost: www.w3.org\nContent-Length:5242880\r\n\r\n" + rs)
-	Debug("Sent large POST")
+	i.data <- []byte("POST / HTTP/1.1\r\nHost: www.w3.org\nContent-Length:5242880\r\n\r\n" + rs)
 }
 
 // EmitOPTIONS emits OPTIONS request, similar to GET
 func (i *TestInput) EmitOPTIONS() {
-	i.data <- []byte("OPTIONS / HTTP/1.1\nHost: www.w3.org\r\n\r\n")
+	i.data <- []byte("OPTIONS / HTTP/1.1\r\nHost: www.w3.org\r\n\r\n")
 }
 
 func (i *TestInput) String() string {

test_output.go

@@ -1,6 +1,6 @@
 package main
 
-type writeCallback func(data []byte)
+type writeCallback func(*Message)
 
 // TestOutput used in testing to intercept any output into callback
 type TestOutput struct {
@@ -8,19 +8,20 @@ type TestOutput struct {
 }
 
 // NewTestOutput constructor for TestOutput, accepts callback which get called on each incoming Write
-func NewTestOutput(cb writeCallback) (i *TestOutput) {
-	i = new(TestOutput)
+func NewTestOutput(cb writeCallback) PluginWriter {
+	i := new(TestOutput)
 	i.cb = cb
 
-	return
+	return i
 }
 
-func (i *TestOutput) Write(data []byte) (int, error) {
-	i.cb(data)
+// PluginWrite write message to this plugin
+func (i *TestOutput) PluginWrite(msg *Message) (int, error) {
+	i.cb(msg)
 
-	return len(data), nil
+	return len(msg.Data) + len(msg.Meta), nil
 }
 
 func (i *TestOutput) String() string {
-	return "Test Input"
+	return "Test Output"
 }

vendor/github.com/Shopify/sarama/.gitignore

@@ -1,27 +0,0 @@
-# Compiled Object files, Static and Dynamic libs (Shared Objects)
-*.o
-*.a
-*.so
-*.test
-
-# Folders
-_obj
-_test
-.vagrant
-
-# Architecture specific extensions/prefixes
-*.[568vq]
-[568vq].out
-
-*.cgo1.go
-*.cgo2.c
-_cgo_defun.c
-_cgo_gotypes.go
-_cgo_export.*
-
-_testmain.go
-
-*.exe
-
-coverage.txt
-profile.out

vendor/github.com/Shopify/sarama/.golangci.yml

@@ -1,74 +0,0 @@
-run:
-  timeout: 5m
-  deadline: 10m
-
-linters-settings:
-  govet:
-    check-shadowing: false
-  golint:
-    min-confidence: 0
-  gocyclo:
-    min-complexity: 99
-  maligned:
-    suggest-new: true
-  dupl:
-    threshold: 100
-  goconst:
-    min-len: 2
-    min-occurrences: 3
-  misspell:
-    locale: US
-  goimports:
-    local-prefixes: github.com/Shopify/sarama
-  gocritic:
-    enabled-tags:
-      - diagnostic
-      - experimental
-      - opinionated
-      - performance
-      - style
-    disabled-checks:
-      - wrapperFunc
-      - ifElseChain
-  funlen:
-    lines: 300
-    statements: 300
-
-linters:
-  disable-all: true
-  enable:
-    - bodyclose
-    - deadcode
-    - depguard
-    - dogsled
-    # - dupl
-    - errcheck
-    - funlen
-    # - gocritic
-    - gocyclo
-    - gofmt
-    - goimports
-    # - golint
-    - gosec
-    # - gosimple
-    - govet
-    # - ineffassign
-    - interfacer
-    # - misspell
-    # - nakedret
-    # - scopelint
-    # - staticcheck
-    - structcheck
-    # - stylecheck
-    - typecheck
-    - unconvert
-    - unused
-    - varcheck
-    - whitespace
-    # - goconst
-    # - gochecknoinits
-
-issues:
-  exclude:
-    - consider giving a name to these results
-    - include an explanation for nolint directive

vendor/github.com/Shopify/sarama/CHANGELOG.md

@@ -1,912 +0,0 @@
-# Changelog
-
-#### Unreleased
-
-#### Version 1.26.1 (2020-02-04)
-
-Improvements:
-- Add requests-in-flight metric ([1539](https://github.com/Shopify/sarama/pull/1539))
-- Fix misleading example for cluster admin ([1595](https://github.com/Shopify/sarama/pull/1595))
-- Replace Travis with GitHub Actions, linters housekeeping ([1573](https://github.com/Shopify/sarama/pull/1573))
-- Allow BalanceStrategy to provide custom assignment data ([1592](https://github.com/Shopify/sarama/pull/1592))
-
-Bug Fixes:
-- Adds back Consumer.Offsets.CommitInterval to fix API ([1590](https://github.com/Shopify/sarama/pull/1590))
-- Fix error message s/CommitInterval/AutoCommit.Interval ([1589](https://github.com/Shopify/sarama/pull/1589))
-
-#### Version 1.26.0 (2020-01-24)
-
-New Features:
-- Enable zstd compression
-  ([1574](https://github.com/Shopify/sarama/pull/1574),
-  [1582](https://github.com/Shopify/sarama/pull/1582))
-- Support headers in tools kafka-console-producer
-  ([1549](https://github.com/Shopify/sarama/pull/1549))
-
-Improvements:
-- Add SASL AuthIdentity to SASL frames (authzid)
-  ([1585](https://github.com/Shopify/sarama/pull/1585)).
-
-Bug Fixes:
-- Sending messages with ZStd compression enabled fails in multiple ways
-  ([1252](https://github.com/Shopify/sarama/issues/1252)).
-- Use the broker for any admin on BrokerConfig
-  ([1571](https://github.com/Shopify/sarama/pull/1571)).
-- Set DescribeConfigRequest Version field
-  ([1576](https://github.com/Shopify/sarama/pull/1576)).
-- ConsumerGroup flooding logs with client/metadata update req
-  ([1578](https://github.com/Shopify/sarama/pull/1578)).
-- MetadataRequest version in DescribeCluster
-  ([1580](https://github.com/Shopify/sarama/pull/1580)).
-- Fix deadlock in consumer group handleError
-  ([1581](https://github.com/Shopify/sarama/pull/1581))
-- Fill in the Fetch{Request,Response} protocol
-  ([1582](https://github.com/Shopify/sarama/pull/1582)).
-- Retry topic request on ControllerNotAvailable
-  ([1586](https://github.com/Shopify/sarama/pull/1586)).
-
-#### Version 1.25.0 (2020-01-13)
-
-New Features:
-- Support TLS protocol in kafka-producer-performance
-  ([1538](https://github.com/Shopify/sarama/pull/1538)).
-- Add support for kafka 2.4.0
-  ([1552](https://github.com/Shopify/sarama/pull/1552)).
-
-Improvements:
-- Allow the Consumer to disable auto-commit offsets
-  ([1164](https://github.com/Shopify/sarama/pull/1164)).
-- Produce records with consistent timestamps
-  ([1455](https://github.com/Shopify/sarama/pull/1455)).
-
-Bug Fixes:
-- Fix incorrect SetTopicMetadata name mentions
-  ([1534](https://github.com/Shopify/sarama/pull/1534)).
-- Fix client.tryRefreshMetadata Println
-  ([1535](https://github.com/Shopify/sarama/pull/1535)).
-- Fix panic on calling updateMetadata on closed client
-  ([1531](https://github.com/Shopify/sarama/pull/1531)).
-- Fix possible faulty metrics in TestFuncProducing
-  ([1545](https://github.com/Shopify/sarama/pull/1545)).
-
-#### Version 1.24.1 (2019-10-31)
-
-New Features:
-- Add DescribeLogDirs Request/Response pair
-  ([1520](https://github.com/Shopify/sarama/pull/1520)).
-
-Bug Fixes:
-- Fix ClusterAdmin returning invalid controller ID on DescribeCluster
-  ([1518](https://github.com/Shopify/sarama/pull/1518)).
-- Fix issue with consumergroup not rebalancing when new partition is added
-  ([1525](https://github.com/Shopify/sarama/pull/1525)).
-- Ensure consistent use of read/write deadlines
-  ([1529](https://github.com/Shopify/sarama/pull/1529)).
-
-#### Version 1.24.0 (2019-10-09)
-
-New Features:
-- Add sticky partition assignor
-  ([1416](https://github.com/Shopify/sarama/pull/1416)).
-- Switch from cgo zstd package to pure Go implementation
-  ([1477](https://github.com/Shopify/sarama/pull/1477)).
-
-Improvements:
-- Allow creating ClusterAdmin from client
-  ([1415](https://github.com/Shopify/sarama/pull/1415)).
-- Set KafkaVersion in ListAcls method
-  ([1452](https://github.com/Shopify/sarama/pull/1452)).
-- Set request version in CreateACL ClusterAdmin method
-  ([1458](https://github.com/Shopify/sarama/pull/1458)).
-- Set request version in DeleteACL ClusterAdmin method
-  ([1461](https://github.com/Shopify/sarama/pull/1461)).
-- Handle missed error codes on TopicMetaDataRequest and GroupCoordinatorRequest
-  ([1464](https://github.com/Shopify/sarama/pull/1464)).
-- Remove direct usage of gofork
-  ([1465](https://github.com/Shopify/sarama/pull/1465)).
-- Add support for Go 1.13
-  ([1478](https://github.com/Shopify/sarama/pull/1478)).
-- Improve behavior of NewMockListAclsResponse
-  ([1481](https://github.com/Shopify/sarama/pull/1481)).
-
-Bug Fixes:
-- Fix race condition in consumergroup example
-  ([1434](https://github.com/Shopify/sarama/pull/1434)).
-- Fix brokerProducer goroutine leak
-  ([1442](https://github.com/Shopify/sarama/pull/1442)).
-- Use released version of lz4 library
-  ([1469](https://github.com/Shopify/sarama/pull/1469)).
-- Set correct version in MockDeleteTopicsResponse
-  ([1484](https://github.com/Shopify/sarama/pull/1484)).
-- Fix CLI help message typo
-  ([1494](https://github.com/Shopify/sarama/pull/1494)).
-
-Known Issues:
-- Please **don't** use Zstd, as it doesn't work right now.
-  See https://github.com/Shopify/sarama/issues/1252
-
-#### Version 1.23.1 (2019-07-22)
-
-Bug Fixes:
-- Fix fetch delete bug record
-  ([1425](https://github.com/Shopify/sarama/pull/1425)).
-- Handle SASL/OAUTHBEARER token rejection
-  ([1428](https://github.com/Shopify/sarama/pull/1428)).
-
-#### Version 1.23.0 (2019-07-02)
-
-New Features:
-- Add support for Kafka 2.3.0
-  ([1418](https://github.com/Shopify/sarama/pull/1418)).
-- Add support for ListConsumerGroupOffsets v2
-  ([1374](https://github.com/Shopify/sarama/pull/1374)).
-- Add support for DeleteConsumerGroup
-  ([1417](https://github.com/Shopify/sarama/pull/1417)).
-- Add support for SASLVersion configuration
-  ([1410](https://github.com/Shopify/sarama/pull/1410)).
-- Add kerberos support
-  ([1366](https://github.com/Shopify/sarama/pull/1366)).
-
-Improvements:
-- Improve sasl_scram_client example
-  ([1406](https://github.com/Shopify/sarama/pull/1406)).
-- Fix shutdown and race-condition in consumer-group example
-  ([1404](https://github.com/Shopify/sarama/pull/1404)).
-- Add support for error codes 77—81
-  ([1397](https://github.com/Shopify/sarama/pull/1397)).
-- Pool internal objects allocated per message
-  ([1385](https://github.com/Shopify/sarama/pull/1385)).
-- Reduce packet decoder allocations
-  ([1373](https://github.com/Shopify/sarama/pull/1373)).
-- Support timeout when fetching metadata
-  ([1359](https://github.com/Shopify/sarama/pull/1359)).
-
-Bug Fixes:
-- Fix fetch size integer overflow
-  ([1376](https://github.com/Shopify/sarama/pull/1376)).
-- Handle and log throttled FetchResponses
-  ([1383](https://github.com/Shopify/sarama/pull/1383)).
-- Refactor misspelled word Resouce to Resource
-  ([1368](https://github.com/Shopify/sarama/pull/1368)).
-
-#### Version 1.22.1 (2019-04-29)
-
-Improvements:
-- Use zstd 1.3.8
-  ([1350](https://github.com/Shopify/sarama/pull/1350)).
-- Add support for SaslHandshakeRequest v1
-  ([1354](https://github.com/Shopify/sarama/pull/1354)).
-
-Bug Fixes:
-- Fix V5 MetadataRequest nullable topics array
-  ([1353](https://github.com/Shopify/sarama/pull/1353)).
-- Use a different SCRAM client for each broker connection
-  ([1349](https://github.com/Shopify/sarama/pull/1349)).
-- Fix AllowAutoTopicCreation for MetadataRequest greater than v3
-  ([1344](https://github.com/Shopify/sarama/pull/1344)).
-
-#### Version 1.22.0 (2019-04-09)
-
-New Features:
-- Add Offline Replicas Operation to Client
-  ([1318](https://github.com/Shopify/sarama/pull/1318)).
-- Allow using proxy when connecting to broker
-  ([1326](https://github.com/Shopify/sarama/pull/1326)).
-- Implement ReadCommitted
-  ([1307](https://github.com/Shopify/sarama/pull/1307)).
-- Add support for Kafka 2.2.0
-  ([1331](https://github.com/Shopify/sarama/pull/1331)).
-- Add SASL SCRAM-SHA-512 and SCRAM-SHA-256 mechanismes
-  ([1331](https://github.com/Shopify/sarama/pull/1295)).
-
-Improvements:
-- Unregister all broker metrics on broker stop
-  ([1232](https://github.com/Shopify/sarama/pull/1232)).
-- Add SCRAM authentication example
-  ([1303](https://github.com/Shopify/sarama/pull/1303)).
-- Add consumergroup examples
-  ([1304](https://github.com/Shopify/sarama/pull/1304)).
-- Expose consumer batch size metric
-  ([1296](https://github.com/Shopify/sarama/pull/1296)).
-- Add TLS options to console producer and consumer
-  ([1300](https://github.com/Shopify/sarama/pull/1300)).
-- Reduce client close bookkeeping
-  ([1297](https://github.com/Shopify/sarama/pull/1297)).
-- Satisfy error interface in create responses
-  ([1154](https://github.com/Shopify/sarama/pull/1154)).
-- Please lint gods
-  ([1346](https://github.com/Shopify/sarama/pull/1346)).
-
-Bug Fixes:
-- Fix multi consumer group instance crash
-  ([1338](https://github.com/Shopify/sarama/pull/1338)).
-- Update lz4 to latest version
-  ([1347](https://github.com/Shopify/sarama/pull/1347)).
-- Retry ErrNotCoordinatorForConsumer in new consumergroup session
-  ([1231](https://github.com/Shopify/sarama/pull/1231)).
-- Fix cleanup error handler
-  ([1332](https://github.com/Shopify/sarama/pull/1332)).
-- Fix rate condition in PartitionConsumer
-  ([1156](https://github.com/Shopify/sarama/pull/1156)).
-
-#### Version 1.21.0 (2019-02-24)
-
-New Features:
-- Add CreateAclRequest, DescribeAclRequest, DeleteAclRequest
-  ([1236](https://github.com/Shopify/sarama/pull/1236)).
-- Add DescribeTopic, DescribeConsumerGroup, ListConsumerGroups, ListConsumerGroupOffsets admin requests
-  ([1178](https://github.com/Shopify/sarama/pull/1178)).
-- Implement SASL/OAUTHBEARER
-  ([1240](https://github.com/Shopify/sarama/pull/1240)).
-
-Improvements:
-- Add Go mod support
-  ([1282](https://github.com/Shopify/sarama/pull/1282)).
-- Add error codes 73—76
-  ([1239](https://github.com/Shopify/sarama/pull/1239)).
-- Add retry backoff function
-  ([1160](https://github.com/Shopify/sarama/pull/1160)).
-- Maintain metadata in the producer even when retries are disabled
-  ([1189](https://github.com/Shopify/sarama/pull/1189)).
-- Include ReplicaAssignment in ListTopics
-  ([1274](https://github.com/Shopify/sarama/pull/1274)).
-- Add producer performance tool
-  ([1222](https://github.com/Shopify/sarama/pull/1222)).
-- Add support LogAppend timestamps
-  ([1258](https://github.com/Shopify/sarama/pull/1258)).
-
-Bug Fixes:
-- Fix potential deadlock when a heartbeat request fails
-  ([1286](https://github.com/Shopify/sarama/pull/1286)).
-- Fix consuming compacted topic
-  ([1227](https://github.com/Shopify/sarama/pull/1227)).
-- Set correct Kafka version for DescribeConfigsRequest v1
-  ([1277](https://github.com/Shopify/sarama/pull/1277)).
-- Update kafka test version
-  ([1273](https://github.com/Shopify/sarama/pull/1273)).
-
-#### Version 1.20.1 (2019-01-10)
-
-New Features:
-- Add optional replica id in offset request
-  ([1100](https://github.com/Shopify/sarama/pull/1100)).
-
-Improvements:
-- Implement DescribeConfigs Request + Response v1 & v2
-  ([1230](https://github.com/Shopify/sarama/pull/1230)).
-- Reuse compression objects
-  ([1185](https://github.com/Shopify/sarama/pull/1185)).
-- Switch from png to svg for GoDoc link in README
-  ([1243](https://github.com/Shopify/sarama/pull/1243)).
-- Fix typo in deprecation notice for FetchResponseBlock.Records
-  ([1242](https://github.com/Shopify/sarama/pull/1242)).
-- Fix typos in consumer metadata response file
-  ([1244](https://github.com/Shopify/sarama/pull/1244)).
-
-Bug Fixes:
-- Revert to individual msg retries for non-idempotent
-  ([1203](https://github.com/Shopify/sarama/pull/1203)).
-- Respect MaxMessageBytes limit for uncompressed messages
-  ([1141](https://github.com/Shopify/sarama/pull/1141)).
-
-#### Version 1.20.0 (2018-12-10)
-
-New Features:
- - Add support for zstd compression
-   ([#1170](https://github.com/Shopify/sarama/pull/1170)).
- - Add support for Idempotent Producer
-   ([#1152](https://github.com/Shopify/sarama/pull/1152)).
- - Add support support for Kafka 2.1.0
-   ([#1229](https://github.com/Shopify/sarama/pull/1229)).
- - Add support support for OffsetCommit request/response pairs versions v1 to v5
-   ([#1201](https://github.com/Shopify/sarama/pull/1201)).
- - Add support support for OffsetFetch request/response pair up to version v5
-   ([#1198](https://github.com/Shopify/sarama/pull/1198)).
-
-Improvements:
- - Export broker's Rack setting
-   ([#1173](https://github.com/Shopify/sarama/pull/1173)).
- - Always use latest patch version of Go on CI
-   ([#1202](https://github.com/Shopify/sarama/pull/1202)).
- - Add error codes 61 to 72
-   ([#1195](https://github.com/Shopify/sarama/pull/1195)).
-
-Bug Fixes:
- - Fix build without cgo
-   ([#1182](https://github.com/Shopify/sarama/pull/1182)).
- - Fix go vet suggestion in consumer group file
-   ([#1209](https://github.com/Shopify/sarama/pull/1209)).
- - Fix typos in code and comments
-   ([#1228](https://github.com/Shopify/sarama/pull/1228)).
-
-#### Version 1.19.0 (2018-09-27)
-
-New Features:
- - Implement a higher-level consumer group
-   ([#1099](https://github.com/Shopify/sarama/pull/1099)).
-
-Improvements:
- - Add support for Go 1.11
-   ([#1176](https://github.com/Shopify/sarama/pull/1176)).
-
-Bug Fixes:
- - Fix encoding of `MetadataResponse` with version 2 and higher
-   ([#1174](https://github.com/Shopify/sarama/pull/1174)).
- - Fix race condition in mock async producer
-   ([#1174](https://github.com/Shopify/sarama/pull/1174)).
-
-#### Version 1.18.0 (2018-09-07)
-
-New Features:
- - Make `Partitioner.RequiresConsistency` vary per-message
-   ([#1112](https://github.com/Shopify/sarama/pull/1112)).
- - Add customizable partitioner
-   ([#1118](https://github.com/Shopify/sarama/pull/1118)).
- - Add `ClusterAdmin` support for `CreateTopic`, `DeleteTopic`, `CreatePartitions`,
-   `DeleteRecords`, `DescribeConfig`, `AlterConfig`, `CreateACL`, `ListAcls`, `DeleteACL`
-   ([#1055](https://github.com/Shopify/sarama/pull/1055)).
-
-Improvements:
- - Add support for Kafka 2.0.0
-   ([#1149](https://github.com/Shopify/sarama/pull/1149)).
- - Allow setting `LocalAddr` when dialing an address to support multi-homed hosts
-   ([#1123](https://github.com/Shopify/sarama/pull/1123)).
- - Simpler offset management
-   ([#1127](https://github.com/Shopify/sarama/pull/1127)).
-
-Bug Fixes:
- - Fix mutation of `ProducerMessage.MetaData` when producing to Kafka
-   ([#1110](https://github.com/Shopify/sarama/pull/1110)).
- - Fix consumer block when response did not contain all the
-   expected topic/partition blocks
-   ([#1086](https://github.com/Shopify/sarama/pull/1086)).
- - Fix consumer block when response contains only constrol messages
-   ([#1115](https://github.com/Shopify/sarama/pull/1115)).
- - Add timeout config for ClusterAdmin requests
-   ([#1142](https://github.com/Shopify/sarama/pull/1142)).
- - Add version check when producing message with headers
-   ([#1117](https://github.com/Shopify/sarama/pull/1117)).
- - Fix `MetadataRequest` for empty list of topics
-   ([#1132](https://github.com/Shopify/sarama/pull/1132)).
- - Fix producer topic metadata on-demand fetch when topic error happens in metadata response
-   ([#1125](https://github.com/Shopify/sarama/pull/1125)).
-
-#### Version 1.17.0 (2018-05-30)
-
-New Features:
- - Add support for gzip compression levels
-   ([#1044](https://github.com/Shopify/sarama/pull/1044)).
- - Add support for Metadata request/response pairs versions v1 to v5
-   ([#1047](https://github.com/Shopify/sarama/pull/1047),
-    [#1069](https://github.com/Shopify/sarama/pull/1069)).
- - Add versioning to JoinGroup request/response pairs
-   ([#1098](https://github.com/Shopify/sarama/pull/1098))
- - Add support for CreatePartitions, DeleteGroups, DeleteRecords request/response pairs
-   ([#1065](https://github.com/Shopify/sarama/pull/1065),
-    [#1096](https://github.com/Shopify/sarama/pull/1096),
-    [#1027](https://github.com/Shopify/sarama/pull/1027)).
- - Add `Controller()` method to Client interface
-   ([#1063](https://github.com/Shopify/sarama/pull/1063)).
-
-Improvements:
- - ConsumerMetadataReq/Resp has been migrated to FindCoordinatorReq/Resp
-   ([#1010](https://github.com/Shopify/sarama/pull/1010)).
- - Expose missing protocol parts: `msgSet` and `recordBatch`
-   ([#1049](https://github.com/Shopify/sarama/pull/1049)).
- - Add support for v1 DeleteTopics Request
-   ([#1052](https://github.com/Shopify/sarama/pull/1052)).
- - Add support for Go 1.10
-   ([#1064](https://github.com/Shopify/sarama/pull/1064)).
- - Claim support for Kafka 1.1.0
-   ([#1073](https://github.com/Shopify/sarama/pull/1073)).
-
-Bug Fixes:
- - Fix FindCoordinatorResponse.encode to allow nil Coordinator
-   ([#1050](https://github.com/Shopify/sarama/pull/1050),
-    [#1051](https://github.com/Shopify/sarama/pull/1051)).
- - Clear all metadata when we have the latest topic info
-   ([#1033](https://github.com/Shopify/sarama/pull/1033)).
- - Make `PartitionConsumer.Close` idempotent
-   ([#1092](https://github.com/Shopify/sarama/pull/1092)).
-
-#### Version 1.16.0 (2018-02-12)
-
-New Features:
- - Add support for the Create/Delete Topics request/response pairs
-   ([#1007](https://github.com/Shopify/sarama/pull/1007),
-    [#1008](https://github.com/Shopify/sarama/pull/1008)).
- - Add support for the Describe/Create/Delete ACL request/response pairs
-   ([#1009](https://github.com/Shopify/sarama/pull/1009)).
- - Add support for the five transaction-related request/response pairs
-   ([#1016](https://github.com/Shopify/sarama/pull/1016)).
-
-Improvements:
- - Permit setting version on mock producer responses
-   ([#999](https://github.com/Shopify/sarama/pull/999)).
- - Add `NewMockBrokerListener` helper for testing TLS connections
-   ([#1019](https://github.com/Shopify/sarama/pull/1019)).
- - Changed the default value for `Consumer.Fetch.Default` from 32KiB to 1MiB
-   which results in much higher throughput in most cases
-   ([#1024](https://github.com/Shopify/sarama/pull/1024)).
- - Reuse the `time.Ticker` across fetch requests in the PartitionConsumer to
-   reduce CPU and memory usage when processing many partitions
-   ([#1028](https://github.com/Shopify/sarama/pull/1028)).
- - Assign relative offsets to messages in the producer to save the brokers a
-   recompression pass
-   ([#1002](https://github.com/Shopify/sarama/pull/1002),
-    [#1015](https://github.com/Shopify/sarama/pull/1015)).
-
-Bug Fixes:
- - Fix producing uncompressed batches with the new protocol format
-   ([#1032](https://github.com/Shopify/sarama/issues/1032)).
- - Fix consuming compacted topics with the new protocol format
-   ([#1005](https://github.com/Shopify/sarama/issues/1005)).
- - Fix consuming topics with a mix of protocol formats
-   ([#1021](https://github.com/Shopify/sarama/issues/1021)).
- - Fix consuming when the broker includes multiple batches in a single response
-   ([#1022](https://github.com/Shopify/sarama/issues/1022)).
- - Fix detection of `PartialTrailingMessage` when the partial message was
-   truncated before the magic value indicating its version
-   ([#1030](https://github.com/Shopify/sarama/pull/1030)).
- - Fix expectation-checking in the mock of `SyncProducer.SendMessages`
-   ([#1035](https://github.com/Shopify/sarama/pull/1035)).
-
-#### Version 1.15.0 (2017-12-08)
-
-New Features:
- - Claim official support for Kafka 1.0, though it did already work
-   ([#984](https://github.com/Shopify/sarama/pull/984)).
- - Helper methods for Kafka version numbers to/from strings
-   ([#989](https://github.com/Shopify/sarama/pull/989)).
- - Implement CreatePartitions request/response
-   ([#985](https://github.com/Shopify/sarama/pull/985)).
-
-Improvements:
- - Add error codes 45-60
-   ([#986](https://github.com/Shopify/sarama/issues/986)).
-
-Bug Fixes:
- - Fix slow consuming for certain Kafka 0.11/1.0 configurations
-   ([#982](https://github.com/Shopify/sarama/pull/982)).
- - Correctly determine when a FetchResponse contains the new message format
-   ([#990](https://github.com/Shopify/sarama/pull/990)).
- - Fix producing with multiple headers
-   ([#996](https://github.com/Shopify/sarama/pull/996)).
- - Fix handling of truncated record batches
-   ([#998](https://github.com/Shopify/sarama/pull/998)).
- - Fix leaking metrics when closing brokers
-   ([#991](https://github.com/Shopify/sarama/pull/991)).
-
-#### Version 1.14.0 (2017-11-13)
-
-New Features:
- - Add support for the new Kafka 0.11 record-batch format, including the wire
-   protocol and the necessary behavioural changes in the producer and consumer.
-   Transactions and idempotency are not yet supported, but producing and
-   consuming should work with all the existing bells and whistles (batching,
-   compression, etc) as well as the new custom headers. Thanks to Vlad Hanciuta
-   of Arista Networks for this work. Part of
-   ([#901](https://github.com/Shopify/sarama/issues/901)).
-
-Bug Fixes:
- - Fix encoding of ProduceResponse versions in test
-   ([#970](https://github.com/Shopify/sarama/pull/970)).
- - Return partial replicas list when we have it
-   ([#975](https://github.com/Shopify/sarama/pull/975)).
-
-#### Version 1.13.0 (2017-10-04)
-
-New Features:
- - Support for FetchRequest version 3
-   ([#905](https://github.com/Shopify/sarama/pull/905)).
- - Permit setting version on mock FetchResponses
-   ([#939](https://github.com/Shopify/sarama/pull/939)).
- - Add a configuration option to support storing only minimal metadata for
-   extremely large clusters
-   ([#937](https://github.com/Shopify/sarama/pull/937)).
- - Add `PartitionOffsetManager.ResetOffset` for backtracking tracked offsets
-   ([#932](https://github.com/Shopify/sarama/pull/932)).
-
-Improvements:
- - Provide the block-level timestamp when consuming compressed messages
-   ([#885](https://github.com/Shopify/sarama/issues/885)).
- - `Client.Replicas` and `Client.InSyncReplicas` now respect the order returned
-   by the broker, which can be meaningful
-   ([#930](https://github.com/Shopify/sarama/pull/930)).
- - Use a `Ticker` to reduce consumer timer overhead at the cost of higher
-   variance in the actual timeout
-   ([#933](https://github.com/Shopify/sarama/pull/933)).
-
-Bug Fixes:
- - Gracefully handle messages with negative timestamps
-   ([#907](https://github.com/Shopify/sarama/pull/907)).
- - Raise a proper error when encountering an unknown message version
-   ([#940](https://github.com/Shopify/sarama/pull/940)).
-
-#### Version 1.12.0 (2017-05-08)
-
-New Features:
- - Added support for the `ApiVersions` request and response pair, and Kafka
-   version 0.10.2 ([#867](https://github.com/Shopify/sarama/pull/867)). Note
-   that you still need to specify the Kafka version in the Sarama configuration
-   for the time being.
- - Added a `Brokers` method to the Client which returns the complete set of
-   active brokers ([#813](https://github.com/Shopify/sarama/pull/813)).
- - Added an `InSyncReplicas` method to the Client which returns the set of all
-   in-sync broker IDs for the given partition, now that the Kafka versions for
-   which this was misleading are no longer in our supported set
-   ([#872](https://github.com/Shopify/sarama/pull/872)).
- - Added a `NewCustomHashPartitioner` method which allows constructing a hash
-   partitioner with a custom hash method in case the default (FNV-1a) is not
-   suitable
-   ([#837](https://github.com/Shopify/sarama/pull/837),
-    [#841](https://github.com/Shopify/sarama/pull/841)).
-
-Improvements:
- - Recognize more Kafka error codes
-   ([#859](https://github.com/Shopify/sarama/pull/859)).
-
-Bug Fixes:
- - Fix an issue where decoding a malformed FetchRequest would not return the
-   correct error ([#818](https://github.com/Shopify/sarama/pull/818)).
- - Respect ordering of group protocols in JoinGroupRequests. This fix is
-   transparent if you're using the `AddGroupProtocol` or
-   `AddGroupProtocolMetadata` helpers; otherwise you will need to switch from
-   the `GroupProtocols` field (now deprecated) to use `OrderedGroupProtocols`
-   ([#812](https://github.com/Shopify/sarama/issues/812)).
- - Fix an alignment-related issue with atomics on 32-bit architectures
-   ([#859](https://github.com/Shopify/sarama/pull/859)).
-
-#### Version 1.11.0 (2016-12-20)
-
-_Important:_ As of Sarama 1.11 it is necessary to set the config value of
-`Producer.Return.Successes` to true in order to use the SyncProducer. Previous
-versions would silently override this value when instantiating a SyncProducer
-which led to unexpected values and data races.
-
-New Features:
- - Metrics! Thanks to Sébastien Launay for all his work on this feature
-   ([#701](https://github.com/Shopify/sarama/pull/701),
-    [#746](https://github.com/Shopify/sarama/pull/746),
-    [#766](https://github.com/Shopify/sarama/pull/766)).
- - Add support for LZ4 compression
-   ([#786](https://github.com/Shopify/sarama/pull/786)).
- - Add support for ListOffsetRequest v1 and Kafka 0.10.1
-   ([#775](https://github.com/Shopify/sarama/pull/775)).
- - Added a `HighWaterMarks` method to the Consumer which aggregates the
-   `HighWaterMarkOffset` values of its child topic/partitions
-   ([#769](https://github.com/Shopify/sarama/pull/769)).
-
-Bug Fixes:
- - Fixed producing when using timestamps, compression and Kafka 0.10
-   ([#759](https://github.com/Shopify/sarama/pull/759)).
- - Added missing decoder methods to DescribeGroups response
-   ([#756](https://github.com/Shopify/sarama/pull/756)).
- - Fix producer shutdown when `Return.Errors` is disabled
-   ([#787](https://github.com/Shopify/sarama/pull/787)).
- - Don't mutate configuration in SyncProducer
-   ([#790](https://github.com/Shopify/sarama/pull/790)).
- - Fix crash on SASL initialization failure
-   ([#795](https://github.com/Shopify/sarama/pull/795)).
-
-#### Version 1.10.1 (2016-08-30)
-
-Bug Fixes:
- - Fix the documentation for `HashPartitioner` which was incorrect
-   ([#717](https://github.com/Shopify/sarama/pull/717)).
- - Permit client creation even when it is limited by ACLs
-   ([#722](https://github.com/Shopify/sarama/pull/722)).
- - Several fixes to the consumer timer optimization code, regressions introduced
-   in v1.10.0. Go's timers are finicky
-   ([#730](https://github.com/Shopify/sarama/pull/730),
-    [#733](https://github.com/Shopify/sarama/pull/733),
-    [#734](https://github.com/Shopify/sarama/pull/734)).
- - Handle consuming compressed relative offsets with Kafka 0.10
-   ([#735](https://github.com/Shopify/sarama/pull/735)).
-
-#### Version 1.10.0 (2016-08-02)
-
-_Important:_ As of Sarama 1.10 it is necessary to tell Sarama the version of
-Kafka you are running against (via the `config.Version` value) in order to use
-features that may not be compatible with old Kafka versions. If you don't
-specify this value it will default to 0.8.2 (the minimum supported), and trying
-to use more recent features (like the offset manager) will fail with an error.
-
-_Also:_ The offset-manager's behaviour has been changed to match the upstream
-java consumer (see [#705](https://github.com/Shopify/sarama/pull/705) and
-[#713](https://github.com/Shopify/sarama/pull/713)). If you use the
-offset-manager, please ensure that you are committing one *greater* than the
-last consumed message offset or else you may end up consuming duplicate
-messages.
-
-New Features:
- - Support for Kafka 0.10
-   ([#672](https://github.com/Shopify/sarama/pull/672),
-    [#678](https://github.com/Shopify/sarama/pull/678),
-    [#681](https://github.com/Shopify/sarama/pull/681), and others).
- - Support for configuring the target Kafka version
-   ([#676](https://github.com/Shopify/sarama/pull/676)).
- - Batch producing support in the SyncProducer
-   ([#677](https://github.com/Shopify/sarama/pull/677)).
- - Extend producer mock to allow setting expectations on message contents
-   ([#667](https://github.com/Shopify/sarama/pull/667)).
-
-Improvements:
- - Support `nil` compressed messages for deleting in compacted topics
-   ([#634](https://github.com/Shopify/sarama/pull/634)).
- - Pre-allocate decoding errors, greatly reducing heap usage and GC time against
-   misbehaving brokers ([#690](https://github.com/Shopify/sarama/pull/690)).
- - Re-use consumer expiry timers, removing one allocation per consumed message
-   ([#707](https://github.com/Shopify/sarama/pull/707)).
-
-Bug Fixes:
- - Actually default the client ID to "sarama" like we say we do
-   ([#664](https://github.com/Shopify/sarama/pull/664)).
- - Fix a rare issue where `Client.Leader` could return the wrong error
-   ([#685](https://github.com/Shopify/sarama/pull/685)).
- - Fix a possible tight loop in the consumer
-   ([#693](https://github.com/Shopify/sarama/pull/693)).
- - Match upstream's offset-tracking behaviour
-   ([#705](https://github.com/Shopify/sarama/pull/705)).
- - Report UnknownTopicOrPartition errors from the offset manager
-   ([#706](https://github.com/Shopify/sarama/pull/706)).
- - Fix possible negative partition value from the HashPartitioner
-   ([#709](https://github.com/Shopify/sarama/pull/709)).
-
-#### Version 1.9.0 (2016-05-16)
-
-New Features:
- - Add support for custom offset manager retention durations
-   ([#602](https://github.com/Shopify/sarama/pull/602)).
- - Publish low-level mocks to enable testing of third-party producer/consumer
-   implementations ([#570](https://github.com/Shopify/sarama/pull/570)).
- - Declare support for Golang 1.6
-   ([#611](https://github.com/Shopify/sarama/pull/611)).
- - Support for SASL plain-text auth
-   ([#648](https://github.com/Shopify/sarama/pull/648)).
-
-Improvements:
- - Simplified broker locking scheme slightly
-   ([#604](https://github.com/Shopify/sarama/pull/604)).
- - Documentation cleanup
-   ([#605](https://github.com/Shopify/sarama/pull/605),
-    [#621](https://github.com/Shopify/sarama/pull/621),
-    [#654](https://github.com/Shopify/sarama/pull/654)).
-
-Bug Fixes:
- - Fix race condition shutting down the OffsetManager
-   ([#658](https://github.com/Shopify/sarama/pull/658)).
-
-#### Version 1.8.0 (2016-02-01)
-
-New Features:
- - Full support for Kafka 0.9:
-   - All protocol messages and fields
-   ([#586](https://github.com/Shopify/sarama/pull/586),
-   [#588](https://github.com/Shopify/sarama/pull/588),
-   [#590](https://github.com/Shopify/sarama/pull/590)).
-   - Verified that TLS support works
-   ([#581](https://github.com/Shopify/sarama/pull/581)).
-   - Fixed the OffsetManager compatibility
-   ([#585](https://github.com/Shopify/sarama/pull/585)).
-
-Improvements:
- - Optimize for fewer system calls when reading from the network
-   ([#584](https://github.com/Shopify/sarama/pull/584)).
- - Automatically retry `InvalidMessage` errors to match upstream behaviour
-   ([#589](https://github.com/Shopify/sarama/pull/589)).
-
-#### Version 1.7.0 (2015-12-11)
-
-New Features:
- - Preliminary support for Kafka 0.9
-   ([#572](https://github.com/Shopify/sarama/pull/572)). This comes with several
-   caveats:
-   - Protocol-layer support is mostly in place
-     ([#577](https://github.com/Shopify/sarama/pull/577)), however Kafka 0.9
-     renamed some messages and fields, which we did not in order to preserve API
-     compatibility.
-   - The producer and consumer work against 0.9, but the offset manager does
-     not ([#573](https://github.com/Shopify/sarama/pull/573)).
-   - TLS support may or may not work
-     ([#581](https://github.com/Shopify/sarama/pull/581)).
-
-Improvements:
- - Don't wait for request timeouts on dead brokers, greatly speeding recovery
-   when the TCP connection is left hanging
-   ([#548](https://github.com/Shopify/sarama/pull/548)).
- - Refactored part of the producer. The new version provides a much more elegant
-   solution to [#449](https://github.com/Shopify/sarama/pull/449). It is also
-   slightly more efficient, and much more precise in calculating batch sizes
-   when compression is used
-   ([#549](https://github.com/Shopify/sarama/pull/549),
-   [#550](https://github.com/Shopify/sarama/pull/550),
-   [#551](https://github.com/Shopify/sarama/pull/551)).
-
-Bug Fixes:
- - Fix race condition in consumer test mock
-   ([#553](https://github.com/Shopify/sarama/pull/553)).
-
-#### Version 1.6.1 (2015-09-25)
-
-Bug Fixes:
- - Fix panic that could occur if a user-supplied message value failed to encode
-   ([#449](https://github.com/Shopify/sarama/pull/449)).
-
-#### Version 1.6.0 (2015-09-04)
-
-New Features:
- - Implementation of a consumer offset manager using the APIs introduced in
-   Kafka 0.8.2. The API is designed mainly for integration into a future
-   high-level consumer, not for direct use, although it is *possible* to use it
-   directly.
-   ([#461](https://github.com/Shopify/sarama/pull/461)).
-
-Improvements:
- - CRC32 calculation is much faster on machines with SSE4.2 instructions,
-   removing a major hotspot from most profiles
-   ([#255](https://github.com/Shopify/sarama/pull/255)).
-
-Bug Fixes:
- - Make protocol decoding more robust against some malformed packets generated
-   by go-fuzz ([#523](https://github.com/Shopify/sarama/pull/523),
-   [#525](https://github.com/Shopify/sarama/pull/525)) or found in other ways
-   ([#528](https://github.com/Shopify/sarama/pull/528)).
- - Fix a potential race condition panic in the consumer on shutdown
-   ([#529](https://github.com/Shopify/sarama/pull/529)).
-
-#### Version 1.5.0 (2015-08-17)
-
-New Features:
- - TLS-encrypted network connections are now supported. This feature is subject
-   to change when Kafka releases built-in TLS support, but for now this is
-   enough to work with TLS-terminating proxies
-   ([#154](https://github.com/Shopify/sarama/pull/154)).
-
-Improvements:
- - The consumer will not block if a single partition is not drained by the user;
-   all other partitions will continue to consume normally
-   ([#485](https://github.com/Shopify/sarama/pull/485)).
- - Formatting of error strings has been much improved
-   ([#495](https://github.com/Shopify/sarama/pull/495)).
- - Internal refactoring of the producer for code cleanliness and to enable
-   future work ([#300](https://github.com/Shopify/sarama/pull/300)).
-
-Bug Fixes:
- - Fix a potential deadlock in the consumer on shutdown
-   ([#475](https://github.com/Shopify/sarama/pull/475)).
-
-#### Version 1.4.3 (2015-07-21)
-
-Bug Fixes:
- - Don't include the partitioner in the producer's "fetch partitions"
-   circuit-breaker ([#466](https://github.com/Shopify/sarama/pull/466)).
- - Don't retry messages until the broker is closed when abandoning a broker in
-   the producer ([#468](https://github.com/Shopify/sarama/pull/468)).
- - Update the import path for snappy-go, it has moved again and the API has
-   changed slightly ([#486](https://github.com/Shopify/sarama/pull/486)).
-
-#### Version 1.4.2 (2015-05-27)
-
-Bug Fixes:
- - Update the import path for snappy-go, it has moved from google code to github
-   ([#456](https://github.com/Shopify/sarama/pull/456)).
-
-#### Version 1.4.1 (2015-05-25)
-
-Improvements:
- - Optimizations when decoding snappy messages, thanks to John Potocny
-   ([#446](https://github.com/Shopify/sarama/pull/446)).
-
-Bug Fixes:
- - Fix hypothetical race conditions on producer shutdown
-   ([#450](https://github.com/Shopify/sarama/pull/450),
-   [#451](https://github.com/Shopify/sarama/pull/451)).
-
-#### Version 1.4.0 (2015-05-01)
-
-New Features:
- - The consumer now implements `Topics()` and `Partitions()` methods to enable
-   users to dynamically choose what topics/partitions to consume without
-   instantiating a full client
-   ([#431](https://github.com/Shopify/sarama/pull/431)).
- - The partition-consumer now exposes the high water mark offset value returned
-   by the broker via the `HighWaterMarkOffset()` method ([#339](https://github.com/Shopify/sarama/pull/339)).
- - Added a `kafka-console-consumer` tool capable of handling multiple
-   partitions, and deprecated the now-obsolete `kafka-console-partitionConsumer`
-   ([#439](https://github.com/Shopify/sarama/pull/439),
-   [#442](https://github.com/Shopify/sarama/pull/442)).
-
-Improvements:
- - The producer's logging during retry scenarios is more consistent, more
-   useful, and slightly less verbose
-   ([#429](https://github.com/Shopify/sarama/pull/429)).
- - The client now shuffles its initial list of seed brokers in order to prevent
-   thundering herd on the first broker in the list
-   ([#441](https://github.com/Shopify/sarama/pull/441)).
-
-Bug Fixes:
- - The producer now correctly manages its state if retries occur when it is
-   shutting down, fixing several instances of confusing behaviour and at least
-   one potential deadlock ([#419](https://github.com/Shopify/sarama/pull/419)).
- - The consumer now handles messages for different partitions asynchronously,
-   making it much more resilient to specific user code ordering
-   ([#325](https://github.com/Shopify/sarama/pull/325)).
-
-#### Version 1.3.0 (2015-04-16)
-
-New Features:
- - The client now tracks consumer group coordinators using
-   ConsumerMetadataRequests similar to how it tracks partition leadership using
-   regular MetadataRequests ([#411](https://github.com/Shopify/sarama/pull/411)).
-   This adds two methods to the client API:
-   - `Coordinator(consumerGroup string) (*Broker, error)`
-   - `RefreshCoordinator(consumerGroup string) error`
-
-Improvements:
- - ConsumerMetadataResponses now automatically create a Broker object out of the
-   ID/address/port combination for the Coordinator; accessing the fields
-   individually has been deprecated
-   ([#413](https://github.com/Shopify/sarama/pull/413)).
- - Much improved handling of `OffsetOutOfRange` errors in the consumer.
-   Consumers will fail to start if the provided offset is out of range
-   ([#418](https://github.com/Shopify/sarama/pull/418))
-   and they will automatically shut down if the offset falls out of range
-   ([#424](https://github.com/Shopify/sarama/pull/424)).
- - Small performance improvement in encoding and decoding protocol messages
-   ([#427](https://github.com/Shopify/sarama/pull/427)).
-
-Bug Fixes:
- - Fix a rare race condition in the client's background metadata refresher if
-   it happens to be activated while the client is being closed
-   ([#422](https://github.com/Shopify/sarama/pull/422)).
-
-#### Version 1.2.0 (2015-04-07)
-
-Improvements:
- - The producer's behaviour when `Flush.Frequency` is set is now more intuitive
-   ([#389](https://github.com/Shopify/sarama/pull/389)).
- - The producer is now somewhat more memory-efficient during and after retrying
-   messages due to an improved queue implementation
-   ([#396](https://github.com/Shopify/sarama/pull/396)).
- - The consumer produces much more useful logging output when leadership
-   changes ([#385](https://github.com/Shopify/sarama/pull/385)).
- - The client's `GetOffset` method will now automatically refresh metadata and
-   retry once in the event of stale information or similar
-   ([#394](https://github.com/Shopify/sarama/pull/394)).
- - Broker connections now have support for using TCP keepalives
-   ([#407](https://github.com/Shopify/sarama/issues/407)).
-
-Bug Fixes:
- - The OffsetCommitRequest message now correctly implements all three possible
-   API versions ([#390](https://github.com/Shopify/sarama/pull/390),
-   [#400](https://github.com/Shopify/sarama/pull/400)).
-
-#### Version 1.1.0 (2015-03-20)
-
-Improvements:
- - Wrap the producer's partitioner call in a circuit-breaker so that repeatedly
-   broken topics don't choke throughput
-   ([#373](https://github.com/Shopify/sarama/pull/373)).
-
-Bug Fixes:
- - Fix the producer's internal reference counting in certain unusual scenarios
-   ([#367](https://github.com/Shopify/sarama/pull/367)).
- - Fix the consumer's internal reference counting in certain unusual scenarios
-   ([#369](https://github.com/Shopify/sarama/pull/369)).
- - Fix a condition where the producer's internal control messages could have
-   gotten stuck ([#368](https://github.com/Shopify/sarama/pull/368)).
- - Fix an issue where invalid partition lists would be cached when asking for
-   metadata for a non-existant topic ([#372](https://github.com/Shopify/sarama/pull/372)).
-
-
-#### Version 1.0.0 (2015-03-17)
-
-Version 1.0.0 is the first tagged version, and is almost a complete rewrite. The primary differences with previous untagged versions are:
-
-- The producer has been rewritten; there is now a `SyncProducer` with a blocking API, and an `AsyncProducer` that is non-blocking.
-- The consumer has been rewritten to only open one connection per broker instead of one connection per partition.
-- The main types of Sarama are now interfaces to make depedency injection easy; mock implementations for `Consumer`, `SyncProducer` and `AsyncProducer` are provided in the `github.com/Shopify/sarama/mocks` package.
-- For most uses cases, it is no longer necessary to open a `Client`; this will be done for you.
-- All the configuration values have been unified in the `Config` struct.
-- Much improved test suite.

vendor/github.com/Shopify/sarama/LICENSE

@@ -1,20 +0,0 @@
-Copyright (c) 2013 Shopify
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/Shopify/sarama/Makefile

@@ -1,27 +0,0 @@
-default: fmt get update test lint
-
-GO       := GO111MODULE=on GOPRIVATE=github.com/linkedin GOSUMDB=off go
-GOBUILD  := CGO_ENABLED=0 $(GO) build $(BUILD_FLAG)
-GOTEST   := $(GO) test -gcflags='-l' -p 3 -v -race -timeout 6m -coverprofile=profile.out -covermode=atomic
-
-FILES    := $(shell find . -name '*.go' -type f -not -name '*.pb.go' -not -name '*_generated.go' -not -name '*_test.go')
-TESTS    := $(shell find . -name '*.go' -type f -not -name '*.pb.go' -not -name '*_generated.go' -name '*_test.go')
-
-get:
-	$(GO) get ./...
-	$(GO) mod verify
-	$(GO) mod tidy
-
-update:
-	$(GO) get -u -v all
-	$(GO) mod verify
-	$(GO) mod tidy
-
-fmt:
-	gofmt -s -l -w $(FILES) $(TESTS)
-
-lint:
-	golangci-lint run
-
-test:
-	$(GOTEST) ./...

vendor/github.com/Shopify/sarama/README.md

@@ -1,36 +0,0 @@
-# sarama
-
-[![GoDoc](https://godoc.org/github.com/Shopify/sarama?status.svg)](https://godoc.org/github.com/Shopify/sarama)
-[![Build Status](https://travis-ci.org/Shopify/sarama.svg?branch=master)](https://travis-ci.org/Shopify/sarama)
-[![Coverage](https://codecov.io/gh/Shopify/sarama/branch/master/graph/badge.svg)](https://codecov.io/gh/Shopify/sarama)
-
-Sarama is an MIT-licensed Go client library for [Apache Kafka](https://kafka.apache.org/) version 0.8 (and later).
-
-## Getting started
-
-- API documentation and examples are available via [godoc](https://godoc.org/github.com/Shopify/sarama).
-- Mocks for testing are available in the [mocks](./mocks) subpackage.
-- The [examples](./examples) directory contains more elaborate example applications.
-- The [tools](./tools) directory contains command line tools that can be useful for testing, diagnostics, and instrumentation.
-
-You might also want to look at the [Frequently Asked Questions](https://github.com/Shopify/sarama/wiki/Frequently-Asked-Questions).
-
-## Compatibility and API stability
-
-Sarama provides a "2 releases + 2 months" compatibility guarantee: we support
-the two latest stable releases of Kafka and Go, and we provide a two month
-grace period for older releases. This means we currently officially support
-Go 1.12 through 1.14, and Kafka 2.1 through 2.4, although older releases are
-still likely to work.
-
-Sarama follows semantic versioning and provides API stability via the gopkg.in service.
-You can import a version with a guaranteed stable API via http://gopkg.in/Shopify/sarama.v1.
-A changelog is available [here](CHANGELOG.md).
-
-## Contributing
-
-- Get started by checking our [contribution guidelines](https://github.com/Shopify/sarama/blob/master/.github/CONTRIBUTING.md).
-- Read the [Sarama wiki](https://github.com/Shopify/sarama/wiki) for more technical and design details.
-- The [Kafka Protocol Specification](https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol) contains a wealth of useful information.
-- For more general issues, there is [a google group](https://groups.google.com/forum/#!forum/kafka-clients) for Kafka client developers.
-- If you have any questions, just ask!

vendor/github.com/Shopify/sarama/Vagrantfile

@@ -1,14 +0,0 @@
-# We have 5 * 192MB ZK processes and 5 * 320MB Kafka processes => 2560MB
-MEMORY = 3072
-
-Vagrant.configure("2") do |config|
-  config.vm.box = "ubuntu/bionic64"
-
-  config.vm.provision :shell, path: "vagrant/provision.sh"
-
-  config.vm.network "private_network", ip: "192.168.100.67"
-
-  config.vm.provider "virtualbox" do |v|
-    v.memory = MEMORY
-  end
-end

vendor/github.com/Shopify/sarama/acl_bindings.go

@@ -1,138 +0,0 @@
-package sarama
-
-//Resource holds information about acl resource type
-type Resource struct {
-	ResourceType        AclResourceType
-	ResourceName        string
-	ResourcePatternType AclResourcePatternType
-}
-
-func (r *Resource) encode(pe packetEncoder, version int16) error {
-	pe.putInt8(int8(r.ResourceType))
-
-	if err := pe.putString(r.ResourceName); err != nil {
-		return err
-	}
-
-	if version == 1 {
-		if r.ResourcePatternType == AclPatternUnknown {
-			Logger.Print("Cannot encode an unknown resource pattern type, using Literal instead")
-			r.ResourcePatternType = AclPatternLiteral
-		}
-		pe.putInt8(int8(r.ResourcePatternType))
-	}
-
-	return nil
-}
-
-func (r *Resource) decode(pd packetDecoder, version int16) (err error) {
-	resourceType, err := pd.getInt8()
-	if err != nil {
-		return err
-	}
-	r.ResourceType = AclResourceType(resourceType)
-
-	if r.ResourceName, err = pd.getString(); err != nil {
-		return err
-	}
-	if version == 1 {
-		pattern, err := pd.getInt8()
-		if err != nil {
-			return err
-		}
-		r.ResourcePatternType = AclResourcePatternType(pattern)
-	}
-
-	return nil
-}
-
-//Acl holds information about acl type
-type Acl struct {
-	Principal      string
-	Host           string
-	Operation      AclOperation
-	PermissionType AclPermissionType
-}
-
-func (a *Acl) encode(pe packetEncoder) error {
-	if err := pe.putString(a.Principal); err != nil {
-		return err
-	}
-
-	if err := pe.putString(a.Host); err != nil {
-		return err
-	}
-
-	pe.putInt8(int8(a.Operation))
-	pe.putInt8(int8(a.PermissionType))
-
-	return nil
-}
-
-func (a *Acl) decode(pd packetDecoder, version int16) (err error) {
-	if a.Principal, err = pd.getString(); err != nil {
-		return err
-	}
-
-	if a.Host, err = pd.getString(); err != nil {
-		return err
-	}
-
-	operation, err := pd.getInt8()
-	if err != nil {
-		return err
-	}
-	a.Operation = AclOperation(operation)
-
-	permissionType, err := pd.getInt8()
-	if err != nil {
-		return err
-	}
-	a.PermissionType = AclPermissionType(permissionType)
-
-	return nil
-}
-
-//ResourceAcls is an acl resource type
-type ResourceAcls struct {
-	Resource
-	Acls []*Acl
-}
-
-func (r *ResourceAcls) encode(pe packetEncoder, version int16) error {
-	if err := r.Resource.encode(pe, version); err != nil {
-		return err
-	}
-
-	if err := pe.putArrayLength(len(r.Acls)); err != nil {
-		return err
-	}
-	for _, acl := range r.Acls {
-		if err := acl.encode(pe); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (r *ResourceAcls) decode(pd packetDecoder, version int16) error {
-	if err := r.Resource.decode(pd, version); err != nil {
-		return err
-	}
-
-	n, err := pd.getArrayLength()
-	if err != nil {
-		return err
-	}
-
-	r.Acls = make([]*Acl, n)
-	for i := 0; i < n; i++ {
-		r.Acls[i] = new(Acl)
-		if err := r.Acls[i].decode(pd, version); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}

vendor/github.com/Shopify/sarama/acl_create_request.go

@@ -1,89 +0,0 @@
-package sarama
-
-//CreateAclsRequest is an acl creation request
-type CreateAclsRequest struct {
-	Version      int16
-	AclCreations []*AclCreation
-}
-
-func (c *CreateAclsRequest) encode(pe packetEncoder) error {
-	if err := pe.putArrayLength(len(c.AclCreations)); err != nil {
-		return err
-	}
-
-	for _, aclCreation := range c.AclCreations {
-		if err := aclCreation.encode(pe, c.Version); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (c *CreateAclsRequest) decode(pd packetDecoder, version int16) (err error) {
-	c.Version = version
-	n, err := pd.getArrayLength()
-	if err != nil {
-		return err
-	}
-
-	c.AclCreations = make([]*AclCreation, n)
-
-	for i := 0; i < n; i++ {
-		c.AclCreations[i] = new(AclCreation)
-		if err := c.AclCreations[i].decode(pd, version); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (c *CreateAclsRequest) key() int16 {
-	return 30
-}
-
-func (c *CreateAclsRequest) version() int16 {
-	return c.Version
-}
-
-func (c *CreateAclsRequest) headerVersion() int16 {
-	return 1
-}
-
-func (c *CreateAclsRequest) requiredVersion() KafkaVersion {
-	switch c.Version {
-	case 1:
-		return V2_0_0_0
-	default:
-		return V0_11_0_0
-	}
-}
-
-//AclCreation is a wrapper around Resource and Acl type
-type AclCreation struct {
-	Resource
-	Acl
-}
-
-func (a *AclCreation) encode(pe packetEncoder, version int16) error {
-	if err := a.Resource.encode(pe, version); err != nil {
-		return err
-	}
-	if err := a.Acl.encode(pe); err != nil {
-		return err
-	}
-
-	return nil
-}
-
-func (a *AclCreation) decode(pd packetDecoder, version int16) (err error) {
-	if err := a.Resource.decode(pd, version); err != nil {
-		return err
-	}
-	if err := a.Acl.decode(pd, version); err != nil {
-		return err
-	}
-
-	return nil
-}

vendor/github.com/Shopify/sarama/acl_create_response.go

@@ -1,94 +0,0 @@
-package sarama
-
-import "time"
-
-//CreateAclsResponse is a an acl response creation type
-type CreateAclsResponse struct {
-	ThrottleTime         time.Duration
-	AclCreationResponses []*AclCreationResponse
-}
-
-func (c *CreateAclsResponse) encode(pe packetEncoder) error {
-	pe.putInt32(int32(c.ThrottleTime / time.Millisecond))
-
-	if err := pe.putArrayLength(len(c.AclCreationResponses)); err != nil {
-		return err
-	}
-
-	for _, aclCreationResponse := range c.AclCreationResponses {
-		if err := aclCreationResponse.encode(pe); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (c *CreateAclsResponse) decode(pd packetDecoder, version int16) (err error) {
-	throttleTime, err := pd.getInt32()
-	if err != nil {
-		return err
-	}
-	c.ThrottleTime = time.Duration(throttleTime) * time.Millisecond
-
-	n, err := pd.getArrayLength()
-	if err != nil {
-		return err
-	}
-
-	c.AclCreationResponses = make([]*AclCreationResponse, n)
-	for i := 0; i < n; i++ {
-		c.AclCreationResponses[i] = new(AclCreationResponse)
-		if err := c.AclCreationResponses[i].decode(pd, version); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (c *CreateAclsResponse) key() int16 {
-	return 30
-}
-
-func (c *CreateAclsResponse) version() int16 {
-	return 0
-}
-
-func (c *CreateAclsResponse) headerVersion() int16 {
-	return 0
-}
-
-func (c *CreateAclsResponse) requiredVersion() KafkaVersion {
-	return V0_11_0_0
-}
-
-//AclCreationResponse is an acl creation response type
-type AclCreationResponse struct {
-	Err    KError
-	ErrMsg *string
-}
-
-func (a *AclCreationResponse) encode(pe packetEncoder) error {
-	pe.putInt16(int16(a.Err))
-
-	if err := pe.putNullableString(a.ErrMsg); err != nil {
-		return err
-	}
-
-	return nil
-}
-
-func (a *AclCreationResponse) decode(pd packetDecoder, version int16) (err error) {
-	kerr, err := pd.getInt16()
-	if err != nil {
-		return err
-	}
-	a.Err = KError(kerr)
-
-	if a.ErrMsg, err = pd.getNullableString(); err != nil {
-		return err
-	}
-
-	return nil
-}

vendor/github.com/Shopify/sarama/acl_delete_request.go

@@ -1,62 +0,0 @@
-package sarama
-
-//DeleteAclsRequest is a delete acl request
-type DeleteAclsRequest struct {
-	Version int
-	Filters []*AclFilter
-}
-
-func (d *DeleteAclsRequest) encode(pe packetEncoder) error {
-	if err := pe.putArrayLength(len(d.Filters)); err != nil {
-		return err
-	}
-
-	for _, filter := range d.Filters {
-		filter.Version = d.Version
-		if err := filter.encode(pe); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (d *DeleteAclsRequest) decode(pd packetDecoder, version int16) (err error) {
-	d.Version = int(version)
-	n, err := pd.getArrayLength()
-	if err != nil {
-		return err
-	}
-
-	d.Filters = make([]*AclFilter, n)
-	for i := 0; i < n; i++ {
-		d.Filters[i] = new(AclFilter)
-		d.Filters[i].Version = int(version)
-		if err := d.Filters[i].decode(pd, version); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (d *DeleteAclsRequest) key() int16 {
-	return 31
-}
-
-func (d *DeleteAclsRequest) version() int16 {
-	return int16(d.Version)
-}
-
-func (c *DeleteAclsRequest) headerVersion() int16 {
-	return 1
-}
-
-func (d *DeleteAclsRequest) requiredVersion() KafkaVersion {
-	switch d.Version {
-	case 1:
-		return V2_0_0_0
-	default:
-		return V0_11_0_0
-	}
-}

vendor/github.com/Shopify/sarama/acl_delete_response.go

@@ -1,163 +0,0 @@
-package sarama
-
-import "time"
-
-//DeleteAclsResponse is a delete acl response
-type DeleteAclsResponse struct {
-	Version         int16
-	ThrottleTime    time.Duration
-	FilterResponses []*FilterResponse
-}
-
-func (d *DeleteAclsResponse) encode(pe packetEncoder) error {
-	pe.putInt32(int32(d.ThrottleTime / time.Millisecond))
-
-	if err := pe.putArrayLength(len(d.FilterResponses)); err != nil {
-		return err
-	}
-
-	for _, filterResponse := range d.FilterResponses {
-		if err := filterResponse.encode(pe, d.Version); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (d *DeleteAclsResponse) decode(pd packetDecoder, version int16) (err error) {
-	throttleTime, err := pd.getInt32()
-	if err != nil {
-		return err
-	}
-	d.ThrottleTime = time.Duration(throttleTime) * time.Millisecond
-
-	n, err := pd.getArrayLength()
-	if err != nil {
-		return err
-	}
-	d.FilterResponses = make([]*FilterResponse, n)
-
-	for i := 0; i < n; i++ {
-		d.FilterResponses[i] = new(FilterResponse)
-		if err := d.FilterResponses[i].decode(pd, version); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (d *DeleteAclsResponse) key() int16 {
-	return 31
-}
-
-func (d *DeleteAclsResponse) version() int16 {
-	return d.Version
-}
-
-func (d *DeleteAclsResponse) headerVersion() int16 {
-	return 0
-}
-
-func (d *DeleteAclsResponse) requiredVersion() KafkaVersion {
-	return V0_11_0_0
-}
-
-//FilterResponse is a filter response type
-type FilterResponse struct {
-	Err          KError
-	ErrMsg       *string
-	MatchingAcls []*MatchingAcl
-}
-
-func (f *FilterResponse) encode(pe packetEncoder, version int16) error {
-	pe.putInt16(int16(f.Err))
-	if err := pe.putNullableString(f.ErrMsg); err != nil {
-		return err
-	}
-
-	if err := pe.putArrayLength(len(f.MatchingAcls)); err != nil {
-		return err
-	}
-	for _, matchingAcl := range f.MatchingAcls {
-		if err := matchingAcl.encode(pe, version); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-func (f *FilterResponse) decode(pd packetDecoder, version int16) (err error) {
-	kerr, err := pd.getInt16()
-	if err != nil {
-		return err
-	}
-	f.Err = KError(kerr)
-
-	if f.ErrMsg, err = pd.getNullableString(); err != nil {
-		return err
-	}
-
-	n, err := pd.getArrayLength()
-	if err != nil {
-		return err
-	}
-	f.MatchingAcls = make([]*MatchingAcl, n)
-	for i := 0; i < n; i++ {
-		f.MatchingAcls[i] = new(MatchingAcl)
-		if err := f.MatchingAcls[i].decode(pd, version); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-//MatchingAcl is a matching acl type
-type MatchingAcl struct {
-	Err    KError
-	ErrMsg *string
-	Resource
-	Acl
-}
-
-func (m *MatchingAcl) encode(pe packetEncoder, version int16) error {
-	pe.putInt16(int16(m.Err))
-	if err := pe.putNullableString(m.ErrMsg); err != nil {
-		return err
-	}
-
-	if err := m.Resource.encode(pe, version); err != nil {
-		return err
-	}
-
-	if err := m.Acl.encode(pe); err != nil {
-		return err
-	}
-
-	return nil
-}
-
-func (m *MatchingAcl) decode(pd packetDecoder, version int16) (err error) {
-	kerr, err := pd.getInt16()
-	if err != nil {
-		return err
-	}
-	m.Err = KError(kerr)
-
-	if m.ErrMsg, err = pd.getNullableString(); err != nil {
-		return err
-	}
-
-	if err := m.Resource.decode(pd, version); err != nil {
-		return err
-	}
-
-	if err := m.Acl.decode(pd, version); err != nil {
-		return err
-	}
-
-	return nil
-}

vendor/github.com/Shopify/sarama/acl_describe_request.go

@@ -1,39 +0,0 @@
-package sarama
-
-//DescribeAclsRequest is a secribe acl request type
-type DescribeAclsRequest struct {
-	Version int
-	AclFilter
-}
-
-func (d *DescribeAclsRequest) encode(pe packetEncoder) error {
-	d.AclFilter.Version = d.Version
-	return d.AclFilter.encode(pe)
-}
-
-func (d *DescribeAclsRequest) decode(pd packetDecoder, version int16) (err error) {
-	d.Version = int(version)
-	d.AclFilter.Version = int(version)
-	return d.AclFilter.decode(pd, version)
-}
-
-func (d *DescribeAclsRequest) key() int16 {
-	return 29
-}
-
-func (d *DescribeAclsRequest) version() int16 {
-	return int16(d.Version)
-}
-
-func (d *DescribeAclsRequest) headerVersion() int16 {
-	return 1
-}
-
-func (d *DescribeAclsRequest) requiredVersion() KafkaVersion {
-	switch d.Version {
-	case 1:
-		return V2_0_0_0
-	default:
-		return V0_11_0_0
-	}
-}