Full Code of rakyll/hey for AI

Repository: rakyll/hey
Branch: master
Commit: 5626f79b8698
Files: 17
Total size: 50.6 KB

Directory structure:
gitextract_h2vqp7se/

├── .github/
│   └── workflows/
│       └── go.yml
├── .gitignore
├── .travis.yml
├── Dockerfile
├── LICENSE
├── Makefile
├── README.md
├── go.mod
├── go.sum
├── hey.go
├── hey_test.go
└── requester/
    ├── now_other.go
    ├── now_windows.go
    ├── print.go
    ├── report.go
    ├── requester.go
    └── requester_test.go

================================================
FILE CONTENTS
================================================

================================================
FILE: .github/workflows/go.yml
================================================
# This workflow will build a golang project
# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go

name: Go

on:
  push:
    branches: [ "master" ]
  pull_request:
    branches: [ "master" ]

jobs:

  build:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4

    - name: Set up Go
      uses: actions/setup-go@v4
      with:
        go-version: '1.21'

    - name: Build
      run: go build -v ./...

    - name: Test
      run: go test -v ./...


================================================
FILE: .gitignore
================================================
bin/

================================================
FILE: .travis.yml
================================================
dist: bionic
language: go
go:
  - "1.13"


================================================
FILE: Dockerfile
================================================
FROM golang:1.15 as build

# Create appuser.
# See https://stackoverflow.com/a/55757473/12429735
ENV USER=appuser
ENV UID=10001
RUN adduser \
    --disabled-password \
    --gecos "" \
    --home "/nonexistent" \
    --shell "/sbin/nologin" \
    --no-create-home \
    --uid "${UID}" \
    "${USER}"

RUN apt-get update && apt-get install -y ca-certificates
RUN go get github.com/rakyll/hey

# Build
WORKDIR /go/src/github.com/rakyll/hey
RUN go mod download
RUN CGO_ENABLED=0 GOOS=linux go build -o /go/bin/hey hey.go

###############################################################################
# final stage
FROM scratch
COPY --from=build /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=build /etc/passwd /etc/passwd
COPY --from=build /etc/group /etc/group
USER appuser:appuser

ARG APPLICATION="hey"
ARG DESCRIPTION="HTTP load generator, ApacheBench (ab) replacement, formerly known as rakyll/boom"
ARG PACKAGE="rakyll/hey"

LABEL org.opencontainers.image.ref.name="${PACKAGE}" \
    org.opencontainers.image.authors="Jaana Dogan <@rakyll>" \
    org.opencontainers.image.documentation="https://github.com/${PACKAGE}/README.md" \
    org.opencontainers.image.description="${DESCRIPTION}" \
    org.opencontainers.image.licenses="Apache 2.0" \
    org.opencontainers.image.source="https://github.com/${PACKAGE}"

COPY --from=build /go/bin/${APPLICATION} /hey
ENTRYPOINT ["/hey"]


================================================
FILE: LICENSE
================================================
                                 Apache License
                           Version 2.0, January 2004
                        http://www.apache.org/licenses/

   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION

   1. Definitions.

      "License" shall mean the terms and conditions for use, reproduction,
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   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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   limitations under the License.
   

================================================
FILE: Makefile
================================================
binary = hey

release:
	GOOS=windows GOARCH=amd64 go build -o ./bin/$(binary)_windows_amd64
	GOOS=linux GOARCH=amd64 go build -o ./bin/$(binary)_linux_amd64
	GOOS=darwin GOARCH=amd64 go build -o ./bin/$(binary)_darwin_amd64

upload:
	gsutil -m cp -r ./bin/* gs://hey-releases/

release-upload: release upload



================================================
FILE: README.md
================================================
![hey](http://i.imgur.com/szzD9q0.png)

hey is a tiny program that sends some load to a web application.

hey was originally called boom and was influenced from Tarek Ziade's
tool at [tarekziade/boom](https://github.com/tarekziade/boom). Using the same name was a mistake as it resulted in cases
where binary name conflicts created confusion.
To preserve the name for its original owner, we renamed this project to hey.

## Installation

  - Linux (amd64): https://storage.googleapis.com/hey-releases/hey_linux_amd64
  - macOS (amd64): https://storage.googleapis.com/hey-releases/hey_darwin_amd64
  - Windows (amd64): https://storage.googleapis.com/hey-releases/hey_windows_amd64

### Package Managers

macOS:
-  [Homebrew](https://brew.sh/) users can use `brew install hey`.

## Usage

hey runs provided number of requests in the provided concurrency level and prints stats.

It also supports HTTP2 endpoints.

```
Usage: hey [options...] <url>

Options:
  -n  Number of requests to run. Default is 200.
  -c  Number of workers to run concurrently. Total number of requests cannot
      be smaller than the concurrency level. Default is 50.
  -q  Rate limit, in queries per second (QPS) per worker. Default is no rate limit.
  -z  Duration of application to send requests. When duration is reached,
      application stops and exits. If duration is specified, n is ignored.
      Examples: -z 10s -z 3m.
  -o  Output type. If none provided, a summary is printed.
      "csv" is the only supported alternative. Dumps the response
      metrics in comma-separated values format.

  -m  HTTP method, one of GET, POST, PUT, DELETE, HEAD, OPTIONS.
  -H  Custom HTTP header. You can specify as many as needed by repeating the flag.
      For example, -H "Accept: text/html" -H "Content-Type: application/xml" .
  -t  Timeout for each request in seconds. Default is 20, use 0 for infinite.
  -A  HTTP Accept header.
  -d  HTTP request body.
  -D  HTTP request body from file. For example, /home/user/file.txt or ./file.txt.
  -T  Content-type, defaults to "text/html".
  -a  Basic authentication, username:password.
  -x  HTTP Proxy address as host:port.
  -h2 Enable HTTP/2.

  -host	HTTP Host header.

  -disable-compression  Disable compression.
  -disable-keepalive    Disable keep-alive, prevents re-use of TCP
                        connections between different HTTP requests.
  -disable-redirects    Disable following of HTTP redirects
  -cpus                 Number of used cpu cores.
                        (default for current machine is 8 cores)
```

## Examples

Make requests with default settings:
```
hey https://google.com
```

Make 1000 requests with 100 concurrent workers:
```
hey -n 1000 -c 100 https://google.com
```

Run load test for 30 seconds:
```
hey -z 30s https://google.com
```

Make POST request with custom body:
```
hey \
    -m POST \
    -d "param1=value1&param2=value2" \
    https://google.com
```

Add custom headers:
```
hey \
    -H "Accept: application/json" \
    -H "Authorization: Bearer token" \
    https://google.com
```

Test with HTTP/2:
```
hey -h2 https://google.com
```

Rate limit to 10 queries per second per worker:
```
hey -q 10 -c 5 -z 30s https://google.com
```


================================================
FILE: go.mod
================================================
module github.com/rakyll/hey

require golang.org/x/net v0.48.0

require golang.org/x/text v0.33.0 // indirect

go 1.24.0


================================================
FILE: go.sum
================================================
golang.org/x/net v0.48.0 h1:zyQRTTrjc33Lhh0fBgT/H3oZq9WuvRR5gPC70xpDiQU=
golang.org/x/net v0.48.0/go.mod h1:+ndRgGjkh8FGtu1w1FGbEC31if4VrNVMuKTgcAAnQRY=
golang.org/x/text v0.33.0 h1:B3njUFyqtHDUI5jMn1YIr5B0IE2U0qck04r6d4KPAxE=
golang.org/x/text v0.33.0/go.mod h1:LuMebE6+rBincTi9+xWTY8TztLzKHc/9C1uBCG27+q8=


================================================
FILE: hey.go
================================================
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Command hey is an HTTP load generator.
package main

import (
	"flag"
	"fmt"
	"io/ioutil"
	"math"
	"net/http"
	gourl "net/url"
	"os"
	"os/signal"
	"regexp"
	"runtime"
	"strings"
	"time"

	"github.com/rakyll/hey/requester"
)

const (
	headerRegexp = `^([\w-]+):\s*(.+)`
	authRegexp   = `^(.+):([^\s].+)`
	heyUA        = "hey/0.0.1"
)

var (
	m           = flag.String("m", "GET", "")
	headers     = flag.String("h", "", "")
	body        = flag.String("d", "", "")
	bodyFile    = flag.String("D", "", "")
	accept      = flag.String("A", "", "")
	contentType = flag.String("T", "text/html", "")
	authHeader  = flag.String("a", "", "")
	hostHeader  = flag.String("host", "", "")
	userAgent   = flag.String("U", "", "")

	output = flag.String("o", "", "")

	c = flag.Int("c", 50, "")
	n = flag.Int("n", 200, "")
	q = flag.Float64("q", 0, "")
	t = flag.Int("t", 20, "")
	z = flag.Duration("z", 0, "")

	h2   = flag.Bool("h2", false, "")
	cpus = flag.Int("cpus", runtime.GOMAXPROCS(-1), "")

	disableCompression = flag.Bool("disable-compression", false, "")
	disableKeepAlives  = flag.Bool("disable-keepalive", false, "")
	disableRedirects   = flag.Bool("disable-redirects", false, "")
	proxyAddr          = flag.String("x", "", "")
)

var usage = `Usage: hey [options...] <url>

Options:
  -n  Number of requests to run. Default is 200.
  -c  Number of workers to run concurrently. Total number of requests cannot
      be smaller than the concurrency level. Default is 50.
  -q  Rate limit, in queries per second (QPS) per worker. Default is no rate limit.
  -z  Duration of application to send requests. When duration is reached,
      application stops and exits. If duration is specified, n is ignored.
      Examples: -z 10s -z 3m.
  -o  Output type. If none provided, a summary is printed.
      "csv" is the only supported alternative. Dumps the response
      metrics in comma-separated values format.

  -m  HTTP method, one of GET, POST, PUT, DELETE, HEAD, OPTIONS.
  -H  Custom HTTP header. You can specify as many as needed by repeating the flag.
      For example, -H "Accept: text/html" -H "Content-Type: application/xml" .
  -t  Timeout for each request in seconds. Default is 20, use 0 for infinite.
  -A  HTTP Accept header.
  -d  HTTP request body.
  -D  HTTP request body from file. For example, /home/user/file.txt or ./file.txt.
  -T  Content-type, defaults to "text/html".
  -U  User-Agent, defaults to version "hey/0.0.1".
  -a  Basic authentication, username:password.
  -x  HTTP Proxy address as host:port.
  -h2 Enable HTTP/2.

  -host	HTTP Host header.

  -disable-compression  Disable compression.
  -disable-keepalive    Disable keep-alive, prevents re-use of TCP
                        connections between different HTTP requests.
  -disable-redirects    Disable following of HTTP redirects
  -cpus                 Number of used cpu cores.
                        (default for current machine is %d cores)
`

func main() {
	flag.Usage = func() {
		fmt.Fprint(os.Stderr, fmt.Sprintf(usage, runtime.NumCPU()))
	}

	var hs headerSlice
	flag.Var(&hs, "H", "")

	flag.Parse()
	if flag.NArg() < 1 {
		usageAndExit("")
	}

	runtime.GOMAXPROCS(*cpus)
	num := *n
	conc := *c
	q := *q
	dur := *z

	if dur > 0 {
		num = math.MaxInt32
		if conc <= 0 {
			usageAndExit("-c cannot be smaller than 1.")
		}
	} else {
		if num <= 0 || conc <= 0 {
			usageAndExit("-n and -c cannot be smaller than 1.")
		}

		if num < conc {
			usageAndExit("-n cannot be less than -c.")
		}
	}

	url := flag.Args()[0]
	method := strings.ToUpper(*m)

	// set content-type
	header := make(http.Header)
	header.Set("Content-Type", *contentType)
	// set any other additional headers
	if *headers != "" {
		usageAndExit("Flag '-h' is deprecated, please use '-H' instead.")
	}
	// set any other additional repeatable headers
	for _, h := range hs {
		match, err := parseInputWithRegexp(h, headerRegexp)
		if err != nil {
			usageAndExit(err.Error())
		}
		header.Set(match[1], match[2])
	}

	if *accept != "" {
		header.Set("Accept", *accept)
	}

	// set basic auth if set
	var username, password string
	if *authHeader != "" {
		match, err := parseInputWithRegexp(*authHeader, authRegexp)
		if err != nil {
			usageAndExit(err.Error())
		}
		username, password = match[1], match[2]
	}

	var bodyAll []byte
	if *body != "" {
		bodyAll = []byte(*body)
	}
	if *bodyFile != "" {
		slurp, err := ioutil.ReadFile(*bodyFile)
		if err != nil {
			errAndExit(err.Error())
		}
		bodyAll = slurp
	}

	var proxyURL *gourl.URL
	if *proxyAddr != "" {
		var err error
		proxyURL, err = gourl.Parse(*proxyAddr)
		if err != nil {
			usageAndExit(err.Error())
		}
	}

	req, err := http.NewRequest(method, url, nil)
	if err != nil {
		usageAndExit(err.Error())
	}
	req.ContentLength = int64(len(bodyAll))
	if username != "" || password != "" {
		req.SetBasicAuth(username, password)
	}

	// set host header if set
	if *hostHeader != "" {
		req.Host = *hostHeader
	}

	ua := header.Get("User-Agent")
	if ua == "" {
		ua = heyUA
	} else {
		ua += " " + heyUA
	}
	header.Set("User-Agent", ua)

	// set userAgent header if set
	if *userAgent != "" {
		ua = *userAgent + " " + heyUA
		header.Set("User-Agent", ua)
	}

	req.Header = header

	w := &requester.Work{
		Request:            req,
		RequestBody:        bodyAll,
		N:                  num,
		C:                  conc,
		QPS:                q,
		Timeout:            *t,
		DisableCompression: *disableCompression,
		DisableKeepAlives:  *disableKeepAlives,
		DisableRedirects:   *disableRedirects,
		H2:                 *h2,
		ProxyAddr:          proxyURL,
		Output:             *output,
	}
	w.Init()

	c := make(chan os.Signal, 1)
	signal.Notify(c, os.Interrupt)
	go func() {
		<-c
		w.Stop()
	}()
	if dur > 0 {
		go func() {
			time.Sleep(dur)
			w.Stop()
		}()
	}
	w.Run()
}

func errAndExit(msg string) {
	fmt.Fprintf(os.Stderr, "%s", msg)
	fmt.Fprintf(os.Stderr, "\n")
	os.Exit(1)
}

func usageAndExit(msg string) {
	if msg != "" {
		fmt.Fprintf(os.Stderr, "%s", msg)
		fmt.Fprintf(os.Stderr, "\n\n")
	}
	flag.Usage()
	fmt.Fprintf(os.Stderr, "\n")
	os.Exit(1)
}

func parseInputWithRegexp(input, regx string) ([]string, error) {
	re := regexp.MustCompile(regx)
	matches := re.FindStringSubmatch(input)
	if len(matches) < 1 {
		return nil, fmt.Errorf("could not parse the provided input; input = %v", input)
	}
	return matches, nil
}

type headerSlice []string

func (h *headerSlice) String() string {
	return fmt.Sprintf("%s", *h)
}

func (h *headerSlice) Set(value string) error {
	*h = append(*h, value)
	return nil
}


================================================
FILE: hey_test.go
================================================
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package main

import (
	"testing"
)

func TestParseValidHeaderFlag(t *testing.T) {
	match, err := parseInputWithRegexp("X-Something: !Y10K:;(He@poverflow?)", headerRegexp)
	if err != nil {
		t.Errorf("parseInputWithRegexp errored: %v", err)
	}
	if got, want := match[1], "X-Something"; got != want {
		t.Errorf("got %v; want %v", got, want)
	}
	if got, want := match[2], "!Y10K:;(He@poverflow?)"; got != want {
		t.Errorf("got %v; want %v", got, want)
	}
}

func TestParseInvalidHeaderFlag(t *testing.T) {
	_, err := parseInputWithRegexp("X|oh|bad-input: badbadbad", headerRegexp)
	if err == nil {
		t.Errorf("Header parsing errored; want no errors")
	}
}

func TestParseValidAuthFlag(t *testing.T) {
	match, err := parseInputWithRegexp("_coo-kie_:!!bigmonster@1969sid", authRegexp)
	if err != nil {
		t.Errorf("A valid auth flag was not parsed correctly: %v", err)
	}
	if got, want := match[1], "_coo-kie_"; got != want {
		t.Errorf("got %v; want %v", got, want)
	}
	if got, want := match[2], "!!bigmonster@1969sid"; got != want {
		t.Errorf("got %v; want %v", got, want)
	}
}

func TestParseInvalidAuthFlag(t *testing.T) {
	_, err := parseInputWithRegexp("X|oh|bad-input: badbadbad", authRegexp)
	if err == nil {
		t.Errorf("Header parsing errored; want no errors")
	}
}

func TestParseAuthMetaCharacters(t *testing.T) {
	_, err := parseInputWithRegexp("plus+$*{:boom", authRegexp)
	if err != nil {
		t.Errorf("Auth header with a plus sign in the user name errored: %v", err)
	}
}


================================================
FILE: requester/now_other.go
================================================
// Copyright 2018 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// +build !windows

package requester

import "time"

var startTime = time.Now()

// now returns time.Duration using stdlib time
func now() time.Duration { return time.Since(startTime) }


================================================
FILE: requester/now_windows.go
================================================
// Copyright 2018 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package requester

import (
	"syscall"
	"time"
	"unsafe"
)

// now returns time.Duration using queryPerformanceCounter
func now() time.Duration {
	var now int64
	syscall.Syscall(queryPerformanceCounterProc.Addr(), 1, uintptr(unsafe.Pointer(&now)), 0, 0)
	return time.Duration(now) * time.Second / (time.Duration(qpcFrequency) * time.Nanosecond)
}

// precision timing
var (
	modkernel32                   = syscall.NewLazyDLL("kernel32.dll")
	queryPerformanceFrequencyProc = modkernel32.NewProc("QueryPerformanceFrequency")
	queryPerformanceCounterProc   = modkernel32.NewProc("QueryPerformanceCounter")

	qpcFrequency = queryPerformanceFrequency()
)

// queryPerformanceFrequency returns frequency in ticks per second
func queryPerformanceFrequency() int64 {
	var freq int64
	r1, _, _ := syscall.Syscall(queryPerformanceFrequencyProc.Addr(), 1, uintptr(unsafe.Pointer(&freq)), 0, 0)
	if r1 == 0 {
		panic("call failed")
	}
	return freq
}


================================================
FILE: requester/print.go
================================================
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/*
Hey supports two output formats: summary and CSV

The summary output presents a number of statistics about the requests in a
human-readable format, including:
- general statistics: requests/second, total runtime, and average, fastest, and slowest requests.
- a response time histogram.
- a percentile latency distribution.
- statistics (average, fastest, slowest) on the stages of the requests.

The comma-separated CSV format is proceeded by a header, and consists of the following columns:
1. response-time:	Total time taken for request (in seconds)
2. DNS+dialup:		Time taken to establish the TCP connection (in seconds)
3. DNS:				Time taken to do the DNS lookup (in seconds)
4. Request-write:	Time taken to write full request (in seconds)
5. Response-delay: 	Time taken to first byte received (in seconds)
6. Response-read:	Time taken to read full response (in seconds)
7. status-code:		HTTP status code of the response (e.g. 200)
8. offset:			The time since the start of the benchmark when the request was started. (in seconds)
*/
package requester

import (
	"bytes"
	"encoding/json"
	"fmt"
	"strings"
	"text/template"
)

func newTemplate(output string) *template.Template {
	outputTmpl := output
	switch outputTmpl {
	case "":
		outputTmpl = defaultTmpl
	case "csv":
		outputTmpl = csvTmpl
	}
	return template.Must(template.New("tmpl").Funcs(tmplFuncMap).Parse(outputTmpl))
}

var tmplFuncMap = template.FuncMap{
	"formatNumber":    formatNumber,
	"formatNumberInt": formatNumberInt,
	"histogram":       histogram,
	"jsonify":         jsonify,
}

func jsonify(v interface{}) string {
	d, _ := json.Marshal(v)
	return string(d)
}

func formatNumber(duration float64) string {
	return fmt.Sprintf("%4.4f", duration)
}

func formatNumberInt(duration int) string {
	return fmt.Sprintf("%d", duration)
}

func histogram(buckets []Bucket) string {
	max := 0
	for _, b := range buckets {
		if v := b.Count; v > max {
			max = v
		}
	}
	res := new(bytes.Buffer)
	for i := 0; i < len(buckets); i++ {
		// Normalize bar lengths.
		var barLen int
		if max > 0 {
			barLen = (buckets[i].Count*40 + max/2) / max
		}
		res.WriteString(fmt.Sprintf("  %4.3f [%v]\t|%v\n", buckets[i].Mark, buckets[i].Count, strings.Repeat(barChar, barLen)))
	}
	return res.String()
}

var (
	defaultTmpl = `
Summary:
  Total:	{{ formatNumber .Total.Seconds }} secs
  Slowest:	{{ formatNumber .Slowest }} secs
  Fastest:	{{ formatNumber .Fastest }} secs
  Average:	{{ formatNumber .Average }} secs
  Requests/sec:	{{ formatNumber .Rps }}
  {{ if gt .SizeTotal 0 }}
  Total data:	{{ .SizeTotal }} bytes
  Size/request:	{{ .SizeReq }} bytes{{ end }}

Response time histogram:
{{ histogram .Histogram }}

Latency distribution:{{ range .LatencyDistribution }}
  {{ .Percentage }}%% in {{ formatNumber .Latency }} secs{{ end }}

Details (average, fastest, slowest):
  DNS+dialup:	{{ formatNumber .AvgConn }} secs, {{ formatNumber .ConnMax }} secs, {{ formatNumber .ConnMin }} secs
  DNS-lookup:	{{ formatNumber .AvgDNS }} secs, {{ formatNumber .DnsMax }} secs, {{ formatNumber .DnsMin }} secs
  req write:	{{ formatNumber .AvgReq }} secs, {{ formatNumber .ReqMax }} secs, {{ formatNumber .ReqMin }} secs
  resp wait:	{{ formatNumber .AvgDelay }} secs, {{ formatNumber .DelayMax }} secs, {{ formatNumber .DelayMin }} secs
  resp read:	{{ formatNumber .AvgRes }} secs, {{ formatNumber .ResMax }} secs, {{ formatNumber .ResMin }} secs

Status code distribution:{{ range $code, $num := .StatusCodeDist }}
  [{{ $code }}]	{{ $num }} responses{{ end }}

{{ if gt (len .ErrorDist) 0 }}Error distribution:{{ range $err, $num := .ErrorDist }}
  [{{ $num }}]	{{ $err }}{{ end }}{{ end }}
`
	csvTmpl = `{{ $connLats := .ConnLats }}{{ $dnsLats := .DnsLats }}{{ $dnsLats := .DnsLats }}{{ $reqLats := .ReqLats }}{{ $delayLats := .DelayLats }}{{ $resLats := .ResLats }}{{ $statusCodeLats := .StatusCodes }}{{ $offsets := .Offsets}}response-time,DNS+dialup,DNS,Request-write,Response-delay,Response-read,status-code,offset{{ range $i, $v := .Lats }}
{{ formatNumber $v }},{{ formatNumber (index $connLats $i) }},{{ formatNumber (index $dnsLats $i) }},{{ formatNumber (index $reqLats $i) }},{{ formatNumber (index $delayLats $i) }},{{ formatNumber (index $resLats $i) }},{{ formatNumberInt (index $statusCodeLats $i) }},{{ formatNumber (index $offsets $i) }}{{ end }}`
)


================================================
FILE: requester/report.go
================================================
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package requester

import (
	"bytes"
	"fmt"
	"io"
	"log"
	"sort"
	"time"
)

const (
	barChar = "■"
)

// We report for max 1M results.
const maxRes = 1000000

type report struct {
	avgTotal float64
	fastest  float64
	slowest  float64
	average  float64
	rps      float64

	avgConn     float64
	avgDNS      float64
	avgReq      float64
	avgRes      float64
	avgDelay    float64
	connLats    []float64
	dnsLats     []float64
	reqLats     []float64
	resLats     []float64
	delayLats   []float64
	offsets     []float64
	statusCodes []int

	results chan *result
	done    chan bool
	total   time.Duration

	errorDist map[string]int
	lats      []float64
	sizeTotal int64
	numRes    int64
	output    string

	w io.Writer
}

func newReport(w io.Writer, results chan *result, output string, n int) *report {
	cap := min(n, maxRes)
	return &report{
		output:      output,
		results:     results,
		done:        make(chan bool, 1),
		errorDist:   make(map[string]int),
		w:           w,
		connLats:    make([]float64, 0, cap),
		dnsLats:     make([]float64, 0, cap),
		reqLats:     make([]float64, 0, cap),
		resLats:     make([]float64, 0, cap),
		delayLats:   make([]float64, 0, cap),
		lats:        make([]float64, 0, cap),
		statusCodes: make([]int, 0, cap),
	}
}

func runReporter(r *report) {
	// Loop will continue until channel is closed
	for res := range r.results {
		r.numRes++
		if res.err != nil {
			r.errorDist[res.err.Error()]++
		} else {
			r.avgTotal += res.duration.Seconds()
			r.avgConn += res.connDuration.Seconds()
			r.avgDelay += res.delayDuration.Seconds()
			r.avgDNS += res.dnsDuration.Seconds()
			r.avgReq += res.reqDuration.Seconds()
			r.avgRes += res.resDuration.Seconds()
			if len(r.resLats) < maxRes {
				r.lats = append(r.lats, res.duration.Seconds())
				r.connLats = append(r.connLats, res.connDuration.Seconds())
				r.dnsLats = append(r.dnsLats, res.dnsDuration.Seconds())
				r.reqLats = append(r.reqLats, res.reqDuration.Seconds())
				r.delayLats = append(r.delayLats, res.delayDuration.Seconds())
				r.resLats = append(r.resLats, res.resDuration.Seconds())
				r.statusCodes = append(r.statusCodes, res.statusCode)
				r.offsets = append(r.offsets, res.offset.Seconds())
			}
			if res.contentLength > 0 {
				r.sizeTotal += res.contentLength
			}
		}
	}
	// Signal reporter is done.
	r.done <- true
}

func (r *report) finalize(total time.Duration) {
	r.total = total
	r.rps = float64(r.numRes) / r.total.Seconds()
	r.average = r.avgTotal / float64(len(r.lats))
	r.avgConn = r.avgConn / float64(len(r.lats))
	r.avgDelay = r.avgDelay / float64(len(r.lats))
	r.avgDNS = r.avgDNS / float64(len(r.lats))
	r.avgReq = r.avgReq / float64(len(r.lats))
	r.avgRes = r.avgRes / float64(len(r.lats))
	r.print()
}

func (r *report) print() {
	buf := &bytes.Buffer{}
	if err := newTemplate(r.output).Execute(buf, r.snapshot()); err != nil {
		log.Println("error:", err.Error())
		return
	}
	r.printf("%s", buf.String())

	r.printf("\n")
}

func (r *report) printf(s string, v ...interface{}) {
	fmt.Fprintf(r.w, s, v...)
}

func (r *report) snapshot() Report {
	snapshot := Report{
		AvgTotal:    r.avgTotal,
		Average:     r.average,
		Rps:         r.rps,
		SizeTotal:   r.sizeTotal,
		AvgConn:     r.avgConn,
		AvgDNS:      r.avgDNS,
		AvgReq:      r.avgReq,
		AvgRes:      r.avgRes,
		AvgDelay:    r.avgDelay,
		Total:       r.total,
		ErrorDist:   r.errorDist,
		NumRes:      r.numRes,
		Lats:        make([]float64, len(r.lats)),
		ConnLats:    make([]float64, len(r.lats)),
		DnsLats:     make([]float64, len(r.lats)),
		ReqLats:     make([]float64, len(r.lats)),
		ResLats:     make([]float64, len(r.lats)),
		DelayLats:   make([]float64, len(r.lats)),
		Offsets:     make([]float64, len(r.lats)),
		StatusCodes: make([]int, len(r.lats)),
	}

	if len(r.lats) == 0 {
		return snapshot
	}

	snapshot.SizeReq = r.sizeTotal / int64(len(r.lats))

	copy(snapshot.Lats, r.lats)
	copy(snapshot.ConnLats, r.connLats)
	copy(snapshot.DnsLats, r.dnsLats)
	copy(snapshot.ReqLats, r.reqLats)
	copy(snapshot.ResLats, r.resLats)
	copy(snapshot.DelayLats, r.delayLats)
	copy(snapshot.StatusCodes, r.statusCodes)
	copy(snapshot.Offsets, r.offsets)

	sort.Float64s(r.lats)
	r.fastest = r.lats[0]
	r.slowest = r.lats[len(r.lats)-1]

	sort.Float64s(r.connLats)
	sort.Float64s(r.dnsLats)
	sort.Float64s(r.reqLats)
	sort.Float64s(r.resLats)
	sort.Float64s(r.delayLats)

	snapshot.Histogram = r.histogram()
	snapshot.LatencyDistribution = r.latencies()

	snapshot.Fastest = r.fastest
	snapshot.Slowest = r.slowest
	snapshot.ConnMax = r.connLats[0]
	snapshot.ConnMin = r.connLats[len(r.connLats)-1]
	snapshot.DnsMax = r.dnsLats[0]
	snapshot.DnsMin = r.dnsLats[len(r.dnsLats)-1]
	snapshot.ReqMax = r.reqLats[0]
	snapshot.ReqMin = r.reqLats[len(r.reqLats)-1]
	snapshot.DelayMax = r.delayLats[0]
	snapshot.DelayMin = r.delayLats[len(r.delayLats)-1]
	snapshot.ResMax = r.resLats[0]
	snapshot.ResMin = r.resLats[len(r.resLats)-1]

	statusCodeDist := make(map[int]int, len(snapshot.StatusCodes))
	for _, statusCode := range snapshot.StatusCodes {
		statusCodeDist[statusCode]++
	}
	snapshot.StatusCodeDist = statusCodeDist

	return snapshot
}

func (r *report) latencies() []LatencyDistribution {
	pctls := []int{10, 25, 50, 75, 90, 95, 99}
	data := make([]float64, len(pctls))
	j := 0
	for i := 0; i < len(r.lats) && j < len(pctls); i++ {
		current := i * 100 / len(r.lats)
		if current >= pctls[j] {
			data[j] = r.lats[i]
			j++
		}
	}
	res := make([]LatencyDistribution, len(pctls))
	for i := 0; i < len(pctls); i++ {
		if data[i] > 0 {
			res[i] = LatencyDistribution{Percentage: pctls[i], Latency: data[i]}
		}
	}
	return res
}

func (r *report) histogram() []Bucket {
	bc := 10
	buckets := make([]float64, bc+1)
	counts := make([]int, bc+1)
	bs := (r.slowest - r.fastest) / float64(bc)
	for i := 0; i < bc; i++ {
		buckets[i] = r.fastest + bs*float64(i)
	}
	buckets[bc] = r.slowest
	var bi int
	var max int
	for i := 0; i < len(r.lats); {
		if r.lats[i] <= buckets[bi] {
			i++
			counts[bi]++
			if max < counts[bi] {
				max = counts[bi]
			}
		} else if bi < len(buckets)-1 {
			bi++
		}
	}
	res := make([]Bucket, len(buckets))
	for i := 0; i < len(buckets); i++ {
		res[i] = Bucket{
			Mark:      buckets[i],
			Count:     counts[i],
			Frequency: float64(counts[i]) / float64(len(r.lats)),
		}
	}
	return res
}

type Report struct {
	AvgTotal float64
	Fastest  float64
	Slowest  float64
	Average  float64
	Rps      float64

	AvgConn  float64
	AvgDNS   float64
	AvgReq   float64
	AvgRes   float64
	AvgDelay float64
	ConnMax  float64
	ConnMin  float64
	DnsMax   float64
	DnsMin   float64
	ReqMax   float64
	ReqMin   float64
	ResMax   float64
	ResMin   float64
	DelayMax float64
	DelayMin float64

	Lats        []float64
	ConnLats    []float64
	DnsLats     []float64
	ReqLats     []float64
	ResLats     []float64
	DelayLats   []float64
	Offsets     []float64
	StatusCodes []int

	Total time.Duration

	ErrorDist      map[string]int
	StatusCodeDist map[int]int
	SizeTotal      int64
	SizeReq        int64
	NumRes         int64

	LatencyDistribution []LatencyDistribution
	Histogram           []Bucket
}

type LatencyDistribution struct {
	Percentage int
	Latency    float64
}

type Bucket struct {
	Mark      float64
	Count     int
	Frequency float64
}


================================================
FILE: requester/requester.go
================================================
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Package requester provides commands to run load tests and display results.
package requester

import (
	"bytes"
	"crypto/tls"
	"io"
	"net/http"
	"net/http/httptrace"
	"net/url"
	"os"
	"sync"
	"time"

	"golang.org/x/net/http2"
)

// Max size of the buffer of result channel.
const maxResult = 1000000
const maxIdleConn = 500

type result struct {
	err           error
	statusCode    int
	offset        time.Duration
	duration      time.Duration
	connDuration  time.Duration // connection setup(DNS lookup + Dial up) duration
	dnsDuration   time.Duration // dns lookup duration
	reqDuration   time.Duration // request "write" duration
	resDuration   time.Duration // response "read" duration
	delayDuration time.Duration // delay between response and request
	contentLength int64
}

type Work struct {
	// Request is the request to be made.
	Request *http.Request

	RequestBody []byte

	// RequestFunc is a function to generate requests. If it is nil, then
	// Request and RequestData are cloned for each request.
	RequestFunc func() *http.Request

	// N is the total number of requests to make.
	N int

	// C is the concurrency level, the number of concurrent workers to run.
	C int

	// H2 is an option to make HTTP/2 requests
	H2 bool

	// Timeout in seconds.
	Timeout int

	// Qps is the rate limit in queries per second.
	QPS float64

	// DisableCompression is an option to disable compression in response
	DisableCompression bool

	// DisableKeepAlives is an option to prevents re-use of TCP connections between different HTTP requests
	DisableKeepAlives bool

	// DisableRedirects is an option to prevent the following of HTTP redirects
	DisableRedirects bool

	// Output represents the output type. If "csv" is provided, the
	// output will be dumped as a csv stream.
	Output string

	// ProxyAddr is the address of HTTP proxy server in the format on "host:port".
	// Optional.
	ProxyAddr *url.URL

	// Writer is where results will be written. If nil, results are written to stdout.
	Writer io.Writer

	initOnce sync.Once
	results  chan *result
	stopCh   chan struct{}
	start    time.Duration

	report *report
}

func (b *Work) writer() io.Writer {
	if b.Writer == nil {
		return os.Stdout
	}
	return b.Writer
}

// Init initializes internal data-structures
func (b *Work) Init() {
	b.initOnce.Do(func() {
		b.results = make(chan *result, min(b.C*1000, maxResult))
		b.stopCh = make(chan struct{}, b.C)
	})
}

// Run makes all the requests, prints the summary. It blocks until
// all work is done.
func (b *Work) Run() {
	b.Init()
	b.start = now()
	b.report = newReport(b.writer(), b.results, b.Output, b.N)
	// Run the reporter first, it polls the result channel until it is closed.
	go func() {
		runReporter(b.report)
	}()
	b.runWorkers()
	b.Finish()
}

func (b *Work) Stop() {
	// Send stop signal so that workers can stop gracefully.
	for i := 0; i < b.C; i++ {
		b.stopCh <- struct{}{}
	}
}

func (b *Work) Finish() {
	close(b.results)
	total := now() - b.start
	// Wait until the reporter is done.
	<-b.report.done
	b.report.finalize(total)
}

func (b *Work) makeRequest(c *http.Client) {
	s := now()
	var size int64
	var code int
	var dnsStart, connStart, resStart, reqStart, delayStart time.Duration
	var dnsDuration, connDuration, resDuration, reqDuration, delayDuration time.Duration
	var req *http.Request
	if b.RequestFunc != nil {
		req = b.RequestFunc()
	} else {
		req = cloneRequest(b.Request, b.RequestBody)
	}
	trace := &httptrace.ClientTrace{
		DNSStart: func(info httptrace.DNSStartInfo) {
			dnsStart = now()
		},
		DNSDone: func(dnsInfo httptrace.DNSDoneInfo) {
			dnsDuration = now() - dnsStart
		},
		GetConn: func(h string) {
			connStart = now()
		},
		GotConn: func(connInfo httptrace.GotConnInfo) {
			if !connInfo.Reused {
				connDuration = now() - connStart
			}
			reqStart = now()
		},
		WroteRequest: func(w httptrace.WroteRequestInfo) {
			reqDuration = now() - reqStart
			delayStart = now()
		},
		GotFirstResponseByte: func() {
			delayDuration = now() - delayStart
			resStart = now()
		},
	}
	req = req.WithContext(httptrace.WithClientTrace(req.Context(), trace))
	resp, err := c.Do(req)
	if err == nil {
		size = resp.ContentLength
		code = resp.StatusCode
		io.Copy(io.Discard, resp.Body)
		resp.Body.Close()
	}
	t := now()
	resDuration = t - resStart
	finish := t - s
	b.results <- &result{
		offset:        s,
		statusCode:    code,
		duration:      finish,
		err:           err,
		contentLength: size,
		connDuration:  connDuration,
		dnsDuration:   dnsDuration,
		reqDuration:   reqDuration,
		resDuration:   resDuration,
		delayDuration: delayDuration,
	}
}

func (b *Work) runWorker(client *http.Client, n int) {
	var throttle <-chan time.Time
	if b.QPS > 0 {
		ticker := time.NewTicker(time.Duration(1e6/(b.QPS)) * time.Microsecond)
		defer ticker.Stop()
		throttle = ticker.C
	}

	if b.DisableRedirects {
		client.CheckRedirect = func(req *http.Request, via []*http.Request) error {
			return http.ErrUseLastResponse
		}
	}
	for i := 0; i < n; i++ {
		// Check if application is stopped. Do not send into a closed channel.
		select {
		case <-b.stopCh:
			return
		default:
			if b.QPS > 0 {
				<-throttle
			}
			b.makeRequest(client)
		}
	}
}

func (b *Work) runWorkers() {
	var wg sync.WaitGroup
	wg.Add(b.C)

	tr := &http.Transport{
		TLSClientConfig: &tls.Config{
			InsecureSkipVerify: true,
			ServerName:         b.Request.Host,
		},
		MaxIdleConnsPerHost: min(b.C, maxIdleConn),
		DisableCompression:  b.DisableCompression,
		DisableKeepAlives:   b.DisableKeepAlives,
		Proxy:               http.ProxyURL(b.ProxyAddr),
	}
	if b.H2 {
		http2.ConfigureTransport(tr)
	} else {
		tr.TLSNextProto = make(map[string]func(string, *tls.Conn) http.RoundTripper)
	}
	client := &http.Client{Transport: tr, Timeout: time.Duration(b.Timeout) * time.Second}

	// Ignore the case where b.N % b.C != 0.
	for i := 0; i < b.C; i++ {
		go func() {
			b.runWorker(client, b.N/b.C)
			wg.Done()
		}()
	}
	wg.Wait()
}

// cloneRequest returns a clone of the provided *http.Request.
func cloneRequest(r *http.Request, body []byte) *http.Request {
	r2 := r.Clone(r.Context())
	if len(body) > 0 {
		r2.Body = io.NopCloser(bytes.NewReader(body))
	}
	return r2
}



================================================
FILE: requester/requester_test.go
================================================
// Copyright 2014 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package requester

import (
	"bytes"
	"io"
	"net/http"
	"net/http/httptest"
	"sync"
	"sync/atomic"
	"testing"
	"time"
)

func TestN(t *testing.T) {
	var count int64
	handler := func(w http.ResponseWriter, r *http.Request) {
		atomic.AddInt64(&count, int64(1))
	}
	server := httptest.NewServer(http.HandlerFunc(handler))
	defer server.Close()

	req, _ := http.NewRequest("GET", server.URL, nil)
	w := &Work{
		Request: req,
		N:       20,
		C:       2,
	}
	w.Run()
	if count != 20 {
		t.Errorf("Expected to send 20 requests, found %v", count)
	}
}

func TestQps(t *testing.T) {
	var wg sync.WaitGroup
	var count int64
	handler := func(w http.ResponseWriter, r *http.Request) {
		atomic.AddInt64(&count, int64(1))
	}
	server := httptest.NewServer(http.HandlerFunc(handler))
	defer server.Close()

	req, _ := http.NewRequest("GET", server.URL, nil)
	w := &Work{
		Request: req,
		N:       20,
		C:       2,
		QPS:     1,
	}
	wg.Add(1)
	time.AfterFunc(time.Second, func() {
		if count > 2 {
			t.Errorf("Expected to work at most 2 times, found %v", count)
		}
		wg.Done()
	})
	go w.Run()
	wg.Wait()
}

func TestRequest(t *testing.T) {
	var uri, contentType, some, auth string
	handler := func(w http.ResponseWriter, r *http.Request) {
		uri = r.RequestURI
		contentType = r.Header.Get("Content-type")
		some = r.Header.Get("X-some")
		auth = r.Header.Get("Authorization")
	}
	server := httptest.NewServer(http.HandlerFunc(handler))
	defer server.Close()

	header := make(http.Header)
	header.Add("Content-type", "text/html")
	header.Add("X-some", "value")
	req, _ := http.NewRequest("GET", server.URL, nil)
	req.Header = header
	req.SetBasicAuth("username", "password")
	w := &Work{
		Request: req,
		N:       1,
		C:       1,
	}
	w.Run()
	if uri != "/" {
		t.Errorf("Uri is expected to be /, %v is found", uri)
	}
	if contentType != "text/html" {
		t.Errorf("Content type is expected to be text/html, %v is found", contentType)
	}
	if some != "value" {
		t.Errorf("X-some header is expected to be value, %v is found", some)
	}
	if auth != "Basic dXNlcm5hbWU6cGFzc3dvcmQ=" {
		t.Errorf("Basic authorization is not properly set")
	}
}

func TestBody(t *testing.T) {
	var count int64
	handler := func(w http.ResponseWriter, r *http.Request) {
		body, _ := io.ReadAll(r.Body)
		if string(body) == "Body" {
			atomic.AddInt64(&count, 1)
		}
	}
	server := httptest.NewServer(http.HandlerFunc(handler))
	defer server.Close()

	req, _ := http.NewRequest("POST", server.URL, bytes.NewBuffer([]byte("Body")))
	w := &Work{
		Request:     req,
		RequestBody: []byte("Body"),
		N:           10,
		C:           1,
	}
	w.Run()
	if count != 10 {
		t.Errorf("Expected to work 10 times, found %v", count)
	}
}