486 lines
14 KiB
Go
486 lines
14 KiB
Go
// Copyright 2014 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build h2demo
|
|
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/tls"
|
|
"flag"
|
|
"fmt"
|
|
"hash/crc32"
|
|
"image"
|
|
"image/jpeg"
|
|
"io"
|
|
"io/ioutil"
|
|
"log"
|
|
"net"
|
|
"net/http"
|
|
"os"
|
|
"path"
|
|
"regexp"
|
|
"runtime"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"go4.org/syncutil/singleflight"
|
|
"golang.org/x/crypto/acme/autocert"
|
|
"golang.org/x/net/http2"
|
|
)
|
|
|
|
var (
|
|
prod = flag.Bool("prod", false, "Whether to configure itself to be the production http2.golang.org server.")
|
|
|
|
httpsAddr = flag.String("https_addr", "localhost:4430", "TLS address to listen on ('host:port' or ':port'). Required.")
|
|
httpAddr = flag.String("http_addr", "", "Plain HTTP address to listen on ('host:port', or ':port'). Empty means no HTTP.")
|
|
|
|
hostHTTP = flag.String("http_host", "", "Optional host or host:port to use for http:// links to this service. By default, this is implied from -http_addr.")
|
|
hostHTTPS = flag.String("https_host", "", "Optional host or host:port to use for http:// links to this service. By default, this is implied from -https_addr.")
|
|
)
|
|
|
|
func homeOldHTTP(w http.ResponseWriter, r *http.Request) {
|
|
io.WriteString(w, `<html>
|
|
<body>
|
|
<h1>Go + HTTP/2</h1>
|
|
<p>Welcome to <a href="https://golang.org/">the Go language</a>'s <a href="https://http2.github.io/">HTTP/2</a> demo & interop server.</p>
|
|
<p>Unfortunately, you're <b>not</b> using HTTP/2 right now. To do so:</p>
|
|
<ul>
|
|
<li>Use Firefox Nightly or go to <b>about:config</b> and enable "network.http.spdy.enabled.http2draft"</li>
|
|
<li>Use Google Chrome Canary and/or go to <b>chrome://flags/#enable-spdy4</b> to <i>Enable SPDY/4</i> (Chrome's name for HTTP/2)</li>
|
|
</ul>
|
|
<p>See code & instructions for connecting at <a href="https://github.com/golang/net/tree/master/http2">https://github.com/golang/net/tree/master/http2</a>.</p>
|
|
|
|
</body></html>`)
|
|
}
|
|
|
|
func home(w http.ResponseWriter, r *http.Request) {
|
|
if r.URL.Path != "/" {
|
|
http.NotFound(w, r)
|
|
return
|
|
}
|
|
io.WriteString(w, `<html>
|
|
<body>
|
|
<h1>Go + HTTP/2</h1>
|
|
|
|
<p>Welcome to <a href="https://golang.org/">the Go language</a>'s <a
|
|
href="https://http2.github.io/">HTTP/2</a> demo & interop server.</p>
|
|
|
|
<p>Congratulations, <b>you're using HTTP/2 right now</b>.</p>
|
|
|
|
<p>This server exists for others in the HTTP/2 community to test their HTTP/2 client implementations and point out flaws in our server.</p>
|
|
|
|
<p>
|
|
The code is at <a href="https://golang.org/x/net/http2">golang.org/x/net/http2</a> and
|
|
is used transparently by the Go standard library from Go 1.6 and later.
|
|
</p>
|
|
|
|
<p>Contact info: <i>bradfitz@golang.org</i>, or <a
|
|
href="https://golang.org/s/http2bug">file a bug</a>.</p>
|
|
|
|
<h2>Handlers for testing</h2>
|
|
<ul>
|
|
<li>GET <a href="/reqinfo">/reqinfo</a> to dump the request + headers received</li>
|
|
<li>GET <a href="/clockstream">/clockstream</a> streams the current time every second</li>
|
|
<li>GET <a href="/gophertiles">/gophertiles</a> to see a page with a bunch of images</li>
|
|
<li>GET <a href="/file/gopher.png">/file/gopher.png</a> for a small file (does If-Modified-Since, Content-Range, etc)</li>
|
|
<li>GET <a href="/file/go.src.tar.gz">/file/go.src.tar.gz</a> for a larger file (~10 MB)</li>
|
|
<li>GET <a href="/redirect">/redirect</a> to redirect back to / (this page)</li>
|
|
<li>GET <a href="/goroutines">/goroutines</a> to see all active goroutines in this server</li>
|
|
<li>PUT something to <a href="/crc32">/crc32</a> to get a count of number of bytes and its CRC-32</li>
|
|
<li>PUT something to <a href="/ECHO">/ECHO</a> and it will be streamed back to you capitalized</li>
|
|
</ul>
|
|
|
|
</body></html>`)
|
|
}
|
|
|
|
func reqInfoHandler(w http.ResponseWriter, r *http.Request) {
|
|
w.Header().Set("Content-Type", "text/plain")
|
|
fmt.Fprintf(w, "Method: %s\n", r.Method)
|
|
fmt.Fprintf(w, "Protocol: %s\n", r.Proto)
|
|
fmt.Fprintf(w, "Host: %s\n", r.Host)
|
|
fmt.Fprintf(w, "RemoteAddr: %s\n", r.RemoteAddr)
|
|
fmt.Fprintf(w, "RequestURI: %q\n", r.RequestURI)
|
|
fmt.Fprintf(w, "URL: %#v\n", r.URL)
|
|
fmt.Fprintf(w, "Body.ContentLength: %d (-1 means unknown)\n", r.ContentLength)
|
|
fmt.Fprintf(w, "Close: %v (relevant for HTTP/1 only)\n", r.Close)
|
|
fmt.Fprintf(w, "TLS: %#v\n", r.TLS)
|
|
fmt.Fprintf(w, "\nHeaders:\n")
|
|
r.Header.Write(w)
|
|
}
|
|
|
|
func crcHandler(w http.ResponseWriter, r *http.Request) {
|
|
if r.Method != "PUT" {
|
|
http.Error(w, "PUT required.", 400)
|
|
return
|
|
}
|
|
crc := crc32.NewIEEE()
|
|
n, err := io.Copy(crc, r.Body)
|
|
if err == nil {
|
|
w.Header().Set("Content-Type", "text/plain")
|
|
fmt.Fprintf(w, "bytes=%d, CRC32=%x", n, crc.Sum(nil))
|
|
}
|
|
}
|
|
|
|
type capitalizeReader struct {
|
|
r io.Reader
|
|
}
|
|
|
|
func (cr capitalizeReader) Read(p []byte) (n int, err error) {
|
|
n, err = cr.r.Read(p)
|
|
for i, b := range p[:n] {
|
|
if b >= 'a' && b <= 'z' {
|
|
p[i] = b - ('a' - 'A')
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
type flushWriter struct {
|
|
w io.Writer
|
|
}
|
|
|
|
func (fw flushWriter) Write(p []byte) (n int, err error) {
|
|
n, err = fw.w.Write(p)
|
|
if f, ok := fw.w.(http.Flusher); ok {
|
|
f.Flush()
|
|
}
|
|
return
|
|
}
|
|
|
|
func echoCapitalHandler(w http.ResponseWriter, r *http.Request) {
|
|
if r.Method != "PUT" {
|
|
http.Error(w, "PUT required.", 400)
|
|
return
|
|
}
|
|
io.Copy(flushWriter{w}, capitalizeReader{r.Body})
|
|
}
|
|
|
|
var (
|
|
fsGrp singleflight.Group
|
|
fsMu sync.Mutex // guards fsCache
|
|
fsCache = map[string]http.Handler{}
|
|
)
|
|
|
|
// fileServer returns a file-serving handler that proxies URL.
|
|
// It lazily fetches URL on the first access and caches its contents forever.
|
|
func fileServer(url string) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
hi, err := fsGrp.Do(url, func() (interface{}, error) {
|
|
fsMu.Lock()
|
|
if h, ok := fsCache[url]; ok {
|
|
fsMu.Unlock()
|
|
return h, nil
|
|
}
|
|
fsMu.Unlock()
|
|
|
|
res, err := http.Get(url)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer res.Body.Close()
|
|
slurp, err := ioutil.ReadAll(res.Body)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
modTime := time.Now()
|
|
var h http.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
http.ServeContent(w, r, path.Base(url), modTime, bytes.NewReader(slurp))
|
|
})
|
|
fsMu.Lock()
|
|
fsCache[url] = h
|
|
fsMu.Unlock()
|
|
return h, nil
|
|
})
|
|
if err != nil {
|
|
http.Error(w, err.Error(), 500)
|
|
return
|
|
}
|
|
hi.(http.Handler).ServeHTTP(w, r)
|
|
})
|
|
}
|
|
|
|
func clockStreamHandler(w http.ResponseWriter, r *http.Request) {
|
|
clientGone := w.(http.CloseNotifier).CloseNotify()
|
|
w.Header().Set("Content-Type", "text/plain")
|
|
ticker := time.NewTicker(1 * time.Second)
|
|
defer ticker.Stop()
|
|
fmt.Fprintf(w, "# ~1KB of junk to force browsers to start rendering immediately: \n")
|
|
io.WriteString(w, strings.Repeat("# xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\n", 13))
|
|
|
|
for {
|
|
fmt.Fprintf(w, "%v\n", time.Now())
|
|
w.(http.Flusher).Flush()
|
|
select {
|
|
case <-ticker.C:
|
|
case <-clientGone:
|
|
log.Printf("Client %v disconnected from the clock", r.RemoteAddr)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func registerHandlers() {
|
|
tiles := newGopherTilesHandler()
|
|
|
|
mux2 := http.NewServeMux()
|
|
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
|
|
if r.TLS == nil {
|
|
if r.URL.Path == "/gophertiles" {
|
|
tiles.ServeHTTP(w, r)
|
|
return
|
|
}
|
|
http.Redirect(w, r, "https://"+httpsHost()+"/", http.StatusFound)
|
|
return
|
|
}
|
|
if r.ProtoMajor == 1 {
|
|
if r.URL.Path == "/reqinfo" {
|
|
reqInfoHandler(w, r)
|
|
return
|
|
}
|
|
homeOldHTTP(w, r)
|
|
return
|
|
}
|
|
mux2.ServeHTTP(w, r)
|
|
})
|
|
mux2.HandleFunc("/", home)
|
|
mux2.Handle("/file/gopher.png", fileServer("https://golang.org/doc/gopher/frontpage.png"))
|
|
mux2.Handle("/file/go.src.tar.gz", fileServer("https://storage.googleapis.com/golang/go1.4.1.src.tar.gz"))
|
|
mux2.HandleFunc("/reqinfo", reqInfoHandler)
|
|
mux2.HandleFunc("/crc32", crcHandler)
|
|
mux2.HandleFunc("/ECHO", echoCapitalHandler)
|
|
mux2.HandleFunc("/clockstream", clockStreamHandler)
|
|
mux2.Handle("/gophertiles", tiles)
|
|
mux2.HandleFunc("/redirect", func(w http.ResponseWriter, r *http.Request) {
|
|
http.Redirect(w, r, "/", http.StatusFound)
|
|
})
|
|
stripHomedir := regexp.MustCompile(`/(Users|home)/\w+`)
|
|
mux2.HandleFunc("/goroutines", func(w http.ResponseWriter, r *http.Request) {
|
|
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
|
|
buf := make([]byte, 2<<20)
|
|
w.Write(stripHomedir.ReplaceAll(buf[:runtime.Stack(buf, true)], nil))
|
|
})
|
|
}
|
|
|
|
func newGopherTilesHandler() http.Handler {
|
|
const gopherURL = "https://blog.golang.org/go-programming-language-turns-two_gophers.jpg"
|
|
res, err := http.Get(gopherURL)
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
if res.StatusCode != 200 {
|
|
log.Fatalf("Error fetching %s: %v", gopherURL, res.Status)
|
|
}
|
|
slurp, err := ioutil.ReadAll(res.Body)
|
|
res.Body.Close()
|
|
if err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
im, err := jpeg.Decode(bytes.NewReader(slurp))
|
|
if err != nil {
|
|
if len(slurp) > 1024 {
|
|
slurp = slurp[:1024]
|
|
}
|
|
log.Fatalf("Failed to decode gopher image: %v (got %q)", err, slurp)
|
|
}
|
|
|
|
type subImager interface {
|
|
SubImage(image.Rectangle) image.Image
|
|
}
|
|
const tileSize = 32
|
|
xt := im.Bounds().Max.X / tileSize
|
|
yt := im.Bounds().Max.Y / tileSize
|
|
var tile [][][]byte // y -> x -> jpeg bytes
|
|
for yi := 0; yi < yt; yi++ {
|
|
var row [][]byte
|
|
for xi := 0; xi < xt; xi++ {
|
|
si := im.(subImager).SubImage(image.Rectangle{
|
|
Min: image.Point{xi * tileSize, yi * tileSize},
|
|
Max: image.Point{(xi + 1) * tileSize, (yi + 1) * tileSize},
|
|
})
|
|
buf := new(bytes.Buffer)
|
|
if err := jpeg.Encode(buf, si, &jpeg.Options{Quality: 90}); err != nil {
|
|
log.Fatal(err)
|
|
}
|
|
row = append(row, buf.Bytes())
|
|
}
|
|
tile = append(tile, row)
|
|
}
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
ms, _ := strconv.Atoi(r.FormValue("latency"))
|
|
const nanosPerMilli = 1e6
|
|
if r.FormValue("x") != "" {
|
|
x, _ := strconv.Atoi(r.FormValue("x"))
|
|
y, _ := strconv.Atoi(r.FormValue("y"))
|
|
if ms <= 1000 {
|
|
time.Sleep(time.Duration(ms) * nanosPerMilli)
|
|
}
|
|
if x >= 0 && x < xt && y >= 0 && y < yt {
|
|
http.ServeContent(w, r, "", time.Time{}, bytes.NewReader(tile[y][x]))
|
|
return
|
|
}
|
|
}
|
|
io.WriteString(w, "<html><body onload='showtimes()'>")
|
|
fmt.Fprintf(w, "A grid of %d tiled images is below. Compare:<p>", xt*yt)
|
|
for _, ms := range []int{0, 30, 200, 1000} {
|
|
d := time.Duration(ms) * nanosPerMilli
|
|
fmt.Fprintf(w, "[<a href='https://%s/gophertiles?latency=%d'>HTTP/2, %v latency</a>] [<a href='http://%s/gophertiles?latency=%d'>HTTP/1, %v latency</a>]<br>\n",
|
|
httpsHost(), ms, d,
|
|
httpHost(), ms, d,
|
|
)
|
|
}
|
|
io.WriteString(w, "<p>\n")
|
|
cacheBust := time.Now().UnixNano()
|
|
for y := 0; y < yt; y++ {
|
|
for x := 0; x < xt; x++ {
|
|
fmt.Fprintf(w, "<img width=%d height=%d src='/gophertiles?x=%d&y=%d&cachebust=%d&latency=%d'>",
|
|
tileSize, tileSize, x, y, cacheBust, ms)
|
|
}
|
|
io.WriteString(w, "<br/>\n")
|
|
}
|
|
io.WriteString(w, `<p><div id='loadtimes'></div></p>
|
|
<script>
|
|
function showtimes() {
|
|
var times = 'Times from connection start:<br>'
|
|
times += 'DOM loaded: ' + (window.performance.timing.domContentLoadedEventEnd - window.performance.timing.connectStart) + 'ms<br>'
|
|
times += 'DOM complete (images loaded): ' + (window.performance.timing.domComplete - window.performance.timing.connectStart) + 'ms<br>'
|
|
document.getElementById('loadtimes').innerHTML = times
|
|
}
|
|
</script>
|
|
<hr><a href='/'><< Back to Go HTTP/2 demo server</a></body></html>`)
|
|
})
|
|
}
|
|
|
|
func httpsHost() string {
|
|
if *hostHTTPS != "" {
|
|
return *hostHTTPS
|
|
}
|
|
if v := *httpsAddr; strings.HasPrefix(v, ":") {
|
|
return "localhost" + v
|
|
} else {
|
|
return v
|
|
}
|
|
}
|
|
|
|
func httpHost() string {
|
|
if *hostHTTP != "" {
|
|
return *hostHTTP
|
|
}
|
|
if v := *httpAddr; strings.HasPrefix(v, ":") {
|
|
return "localhost" + v
|
|
} else {
|
|
return v
|
|
}
|
|
}
|
|
|
|
func serveProdTLS() error {
|
|
const cacheDir = "/var/cache/autocert"
|
|
if err := os.MkdirAll(cacheDir, 0700); err != nil {
|
|
return err
|
|
}
|
|
m := autocert.Manager{
|
|
Cache: autocert.DirCache(cacheDir),
|
|
Prompt: autocert.AcceptTOS,
|
|
HostPolicy: autocert.HostWhitelist("http2.golang.org"),
|
|
}
|
|
srv := &http.Server{
|
|
TLSConfig: &tls.Config{
|
|
GetCertificate: m.GetCertificate,
|
|
},
|
|
}
|
|
http2.ConfigureServer(srv, &http2.Server{})
|
|
ln, err := net.Listen("tcp", ":443")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return srv.Serve(tls.NewListener(tcpKeepAliveListener{ln.(*net.TCPListener)}, srv.TLSConfig))
|
|
}
|
|
|
|
type tcpKeepAliveListener struct {
|
|
*net.TCPListener
|
|
}
|
|
|
|
func (ln tcpKeepAliveListener) Accept() (c net.Conn, err error) {
|
|
tc, err := ln.AcceptTCP()
|
|
if err != nil {
|
|
return
|
|
}
|
|
tc.SetKeepAlive(true)
|
|
tc.SetKeepAlivePeriod(3 * time.Minute)
|
|
return tc, nil
|
|
}
|
|
|
|
func serveProd() error {
|
|
errc := make(chan error, 2)
|
|
go func() { errc <- http.ListenAndServe(":80", nil) }()
|
|
go func() { errc <- serveProdTLS() }()
|
|
return <-errc
|
|
}
|
|
|
|
const idleTimeout = 5 * time.Minute
|
|
const activeTimeout = 10 * time.Minute
|
|
|
|
// TODO: put this into the standard library and actually send
|
|
// PING frames and GOAWAY, etc: golang.org/issue/14204
|
|
func idleTimeoutHook() func(net.Conn, http.ConnState) {
|
|
var mu sync.Mutex
|
|
m := map[net.Conn]*time.Timer{}
|
|
return func(c net.Conn, cs http.ConnState) {
|
|
mu.Lock()
|
|
defer mu.Unlock()
|
|
if t, ok := m[c]; ok {
|
|
delete(m, c)
|
|
t.Stop()
|
|
}
|
|
var d time.Duration
|
|
switch cs {
|
|
case http.StateNew, http.StateIdle:
|
|
d = idleTimeout
|
|
case http.StateActive:
|
|
d = activeTimeout
|
|
default:
|
|
return
|
|
}
|
|
m[c] = time.AfterFunc(d, func() {
|
|
log.Printf("closing idle conn %v after %v", c.RemoteAddr(), d)
|
|
go c.Close()
|
|
})
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
var srv http.Server
|
|
flag.BoolVar(&http2.VerboseLogs, "verbose", false, "Verbose HTTP/2 debugging.")
|
|
flag.Parse()
|
|
srv.Addr = *httpsAddr
|
|
srv.ConnState = idleTimeoutHook()
|
|
|
|
registerHandlers()
|
|
|
|
if *prod {
|
|
*hostHTTP = "http2.golang.org"
|
|
*hostHTTPS = "http2.golang.org"
|
|
log.Fatal(serveProd())
|
|
}
|
|
|
|
url := "https://" + httpsHost() + "/"
|
|
log.Printf("Listening on " + url)
|
|
http2.ConfigureServer(&srv, &http2.Server{})
|
|
|
|
if *httpAddr != "" {
|
|
go func() {
|
|
log.Printf("Listening on http://" + httpHost() + "/ (for unencrypted HTTP/1)")
|
|
log.Fatal(http.ListenAndServe(*httpAddr, nil))
|
|
}()
|
|
}
|
|
|
|
go func() {
|
|
log.Fatal(srv.ListenAndServeTLS("server.crt", "server.key"))
|
|
}()
|
|
select {}
|
|
}
|