--- /dev/null
+// 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="/serverpush">/serverpush</a> to see a page with server push</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, latency time.Duration) http.Handler {
+ return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+ if latency > 0 {
+ time.Sleep(latency)
+ }
+ 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()
+ push := newPushHandler()
+
+ mux2 := http.NewServeMux()
+ http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+ switch {
+ case r.URL.Path == "/gophertiles":
+ tiles.ServeHTTP(w, r) // allow HTTP/2 + HTTP/1.x
+ return
+ case strings.HasPrefix(r.URL.Path, "/serverpush"):
+ push.ServeHTTP(w, r) // allow HTTP/2 + HTTP/1.x
+ return
+ case r.TLS == nil: // do not allow HTTP/1.x for anything else
+ 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", 0))
+ mux2.Handle("/file/go.src.tar.gz", fileServer("https://storage.googleapis.com/golang/go1.4.1.src.tar.gz", 0))
+ 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))
+ })
+}
+
+var pushResources = map[string]http.Handler{
+ "/serverpush/static/jquery.min.js": fileServer("https://ajax.googleapis.com/ajax/libs/jquery/1.8.2/jquery.min.js", 100*time.Millisecond),
+ "/serverpush/static/godocs.js": fileServer("https://golang.org/lib/godoc/godocs.js", 100*time.Millisecond),
+ "/serverpush/static/playground.js": fileServer("https://golang.org/lib/godoc/playground.js", 100*time.Millisecond),
+ "/serverpush/static/style.css": fileServer("https://golang.org/lib/godoc/style.css", 100*time.Millisecond),
+}
+
+func newPushHandler() http.Handler {
+ return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+ for path, handler := range pushResources {
+ if r.URL.Path == path {
+ handler.ServeHTTP(w, r)
+ return
+ }
+ }
+
+ cacheBust := time.Now().UnixNano()
+ if pusher, ok := w.(http.Pusher); ok {
+ for path := range pushResources {
+ url := fmt.Sprintf("%s?%d", path, cacheBust)
+ if err := pusher.Push(url, nil); err != nil {
+ log.Printf("Failed to push %v: %v", path, err)
+ }
+ }
+ }
+ time.Sleep(100 * time.Millisecond) // fake network latency + parsing time
+ if err := pushTmpl.Execute(w, struct {
+ CacheBust int64
+ HTTPSHost string
+ HTTPHost string
+ }{
+ CacheBust: cacheBust,
+ HTTPSHost: httpsHost(),
+ HTTPHost: httpHost(),
+ }); err != nil {
+ log.Printf("Executing server push template: %v", err)
+ }
+ })
+}
+
+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{
+ NewWriteScheduler: func() http2.WriteScheduler {
+ return http2.NewPriorityWriteScheduler(nil)
+ },
+ })
+ 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 {}
+}
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