2020-05-31 16:46:41 +02:00
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package main
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import (
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"bufio"
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"encoding/json"
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"errors"
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"fmt"
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"html"
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"io"
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"log"
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"net/http"
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2020-05-31 20:03:22 +02:00
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"net/url"
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2020-05-31 16:46:41 +02:00
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"os"
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2020-05-31 20:03:22 +02:00
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"path"
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2020-05-31 16:46:41 +02:00
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"path/filepath"
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"strings"
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"time"
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"github.com/gorilla/websocket"
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)
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func webserver() {
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http.Handle("/", mungeHandler{http.FileServer(http.Dir(staticRoot))})
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2020-09-10 13:39:38 +02:00
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http.HandleFunc("/group/", groupHandler)
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2020-05-31 20:03:22 +02:00
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http.HandleFunc("/recordings",
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func(w http.ResponseWriter, r *http.Request) {
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http.Redirect(w, r,
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"/recordings/", http.StatusPermanentRedirect)
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})
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http.HandleFunc("/recordings/", recordingsHandler)
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2020-05-31 16:46:41 +02:00
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http.HandleFunc("/ws", wsHandler)
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2020-08-07 11:14:34 +02:00
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http.HandleFunc("/ice-servers.json",
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func(w http.ResponseWriter, r *http.Request) {
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mungeHeader(w)
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http.ServeFile(w, r,
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filepath.Join(dataDir, "ice-servers.json"))
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})
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2020-05-31 16:46:41 +02:00
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http.HandleFunc("/public-groups.json", publicHandler)
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http.HandleFunc("/stats", statsHandler)
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go func() {
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server := &http.Server{
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2020-05-31 16:49:54 +02:00
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Addr: httpAddr,
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ReadHeaderTimeout: 60 * time.Second,
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IdleTimeout: 120 * time.Second,
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2020-05-31 16:46:41 +02:00
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}
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var err error
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err = server.ListenAndServeTLS(
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filepath.Join(dataDir, "cert.pem"),
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filepath.Join(dataDir, "key.pem"),
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)
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if err != nil {
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log.Printf("ListenAndServeTLS: %v", err)
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}
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}()
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}
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func mungeHeader(w http.ResponseWriter) {
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w.Header().Add("Content-Security-Policy",
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"connect-src ws: wss: 'self'; img-src data: 'self'; default-src 'self'")
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}
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type mungeHandler struct {
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h http.Handler
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}
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func (h mungeHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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mungeHeader(w)
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h.h.ServeHTTP(w, r)
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}
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2020-09-10 13:39:38 +02:00
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func parseGroupName(path string) string {
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if !strings.HasPrefix(path, "/group/") {
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return ""
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}
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name := path[len("/group/"):]
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if name == "" {
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return ""
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}
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if name[len(name)-1] == '/' {
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name = name[:len(name)-1]
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}
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return name
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}
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func groupHandler(w http.ResponseWriter, r *http.Request) {
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mungeHeader(w)
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name := parseGroupName(r.URL.Path)
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if name == "" {
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http.NotFound(w, r)
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return
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}
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2020-09-10 13:55:57 +02:00
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g, err := addGroup(name, nil)
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2020-09-10 13:39:38 +02:00
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if err != nil {
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if os.IsNotExist(err) {
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http.NotFound(w, r)
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} else {
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log.Println("addGroup: %v", err)
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http.Error(w, "Internal server error",
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http.StatusInternalServerError)
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}
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return
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}
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2020-09-10 13:55:57 +02:00
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if g.description.Redirect != "" {
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http.Redirect(w, r, g.description.Redirect,
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http.StatusPermanentRedirect)
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return
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}
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2020-09-10 13:39:38 +02:00
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http.ServeFile(w, r, filepath.Join(staticRoot, "sfu.html"))
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}
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2020-05-31 16:46:41 +02:00
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func publicHandler(w http.ResponseWriter, r *http.Request) {
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w.Header().Set("content-type", "application/json")
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w.Header().Set("cache-control", "no-cache")
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if r.Method == "HEAD" {
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return
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}
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g := getPublicGroups()
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e := json.NewEncoder(w)
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e.Encode(g)
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return
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}
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func getPassword() (string, string, error) {
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f, err := os.Open(filepath.Join(dataDir, "passwd"))
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if err != nil {
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return "", "", err
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}
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defer f.Close()
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r := bufio.NewReader(f)
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s, err := r.ReadString('\n')
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if err != nil {
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return "", "", err
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}
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l := strings.SplitN(strings.TrimSpace(s), ":", 2)
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if len(l) != 2 {
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return "", "", errors.New("couldn't parse passwords")
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}
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return l[0], l[1], nil
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}
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2020-05-31 20:03:22 +02:00
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func failAuthentication(w http.ResponseWriter, realm string) {
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w.Header().Set("www-authenticate",
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fmt.Sprintf("basic realm=\"%v\"", realm))
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http.Error(w, "Haha!", http.StatusUnauthorized)
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}
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2020-05-31 16:46:41 +02:00
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2020-05-31 20:03:22 +02:00
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func statsHandler(w http.ResponseWriter, r *http.Request) {
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2020-05-31 16:46:41 +02:00
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u, p, err := getPassword()
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if err != nil {
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log.Printf("Passwd: %v", err)
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2020-05-31 20:03:22 +02:00
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failAuthentication(w, "stats")
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2020-05-31 16:46:41 +02:00
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return
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}
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username, password, ok := r.BasicAuth()
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if !ok || username != u || password != p {
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2020-05-31 20:03:22 +02:00
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failAuthentication(w, "stats")
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2020-05-31 16:46:41 +02:00
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return
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}
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w.Header().Set("content-type", "text/html; charset=utf-8")
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w.Header().Set("cache-control", "no-cache")
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if r.Method == "HEAD" {
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return
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}
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stats := getGroupStats()
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fmt.Fprintf(w, "<!DOCTYPE html>\n<html><head>\n")
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fmt.Fprintf(w, "<title>Stats</title>\n")
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2020-05-31 20:03:22 +02:00
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fmt.Fprintf(w, "<link rel=\"stylesheet\" type=\"text/css\" href=\"/common.css\"/>")
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2020-05-31 16:46:41 +02:00
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fmt.Fprintf(w, "<head><body>\n")
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printBitrate := func(w io.Writer, rate, maxRate uint64) error {
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var err error
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if maxRate != 0 && maxRate != ^uint64(0) {
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_, err = fmt.Fprintf(w, "%v/%v", rate, maxRate)
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} else {
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_, err = fmt.Fprintf(w, "%v", rate)
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}
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return err
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}
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printTrack := func(w io.Writer, t trackStats) {
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fmt.Fprintf(w, "<tr><td></td><td></td><td></td>")
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fmt.Fprintf(w, "<td>")
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printBitrate(w, t.bitrate, t.maxBitrate)
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fmt.Fprintf(w, "</td>")
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fmt.Fprintf(w, "<td>%d%%</td>",
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t.loss,
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)
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2020-06-03 21:48:20 +02:00
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fmt.Fprintf(w, "<td>")
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if t.rtt > 0 {
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fmt.Fprintf(w, "%v", t.rtt)
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}
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2020-05-31 16:46:41 +02:00
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if t.jitter > 0 {
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2020-06-03 21:48:20 +02:00
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fmt.Fprintf(w, "±%v", t.jitter)
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2020-05-31 16:46:41 +02:00
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}
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2020-06-03 21:48:20 +02:00
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fmt.Fprintf(w, "</td>")
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2020-05-31 16:46:41 +02:00
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fmt.Fprintf(w, "</tr>")
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}
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for _, gs := range stats {
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fmt.Fprintf(w, "<p>%v</p>\n", html.EscapeString(gs.name))
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fmt.Fprintf(w, "<table>")
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for _, cs := range gs.clients {
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fmt.Fprintf(w, "<tr><td>%v</td></tr>\n", cs.id)
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for _, up := range cs.up {
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2020-06-12 17:39:16 +02:00
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fmt.Fprintf(w, "<tr><td></td><td>Up</td><td>%v</td>",
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2020-05-31 16:46:41 +02:00
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up.id)
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2020-06-12 17:39:16 +02:00
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if up.maxBitrate > 0 {
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fmt.Fprintf(w, "<td>%v</td>",
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up.maxBitrate)
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}
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fmt.Fprintf(w, "</tr>\n")
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2020-05-31 16:46:41 +02:00
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for _, t := range up.tracks {
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printTrack(w, t)
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}
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}
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2020-06-12 17:39:16 +02:00
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for _, down := range cs.down {
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fmt.Fprintf(w, "<tr><td></td><td>Down</td><td> %v</td>",
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down.id)
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if down.maxBitrate > 0 {
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fmt.Fprintf(w, "<td>%v</td>",
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down.maxBitrate)
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}
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fmt.Fprintf(w, "</tr>\n")
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for _, t := range down.tracks {
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2020-05-31 16:46:41 +02:00
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printTrack(w, t)
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}
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}
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}
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fmt.Fprintf(w, "</table>\n")
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}
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fmt.Fprintf(w, "</body></html>\n")
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}
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var upgrader websocket.Upgrader
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func wsHandler(w http.ResponseWriter, r *http.Request) {
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conn, err := upgrader.Upgrade(w, r, nil)
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if err != nil {
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log.Printf("Websocket upgrade: %v", err)
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return
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}
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go func() {
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err := startClient(conn)
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if err != nil {
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log.Printf("client: %v", err)
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}
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}()
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}
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2020-05-31 20:03:22 +02:00
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func recordingsHandler(w http.ResponseWriter, r *http.Request) {
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if len(r.URL.Path) < 12 || r.URL.Path[:12] != "/recordings/" {
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http.Error(w, "server error", http.StatusInternalServerError)
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return
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}
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pth := r.URL.Path[12:]
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if pth == "" {
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http.Error(w, "nothing to see", http.StatusNotImplemented)
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return
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}
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f, err := os.Open(filepath.Join(recordingsDir, pth))
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if err != nil {
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if os.IsNotExist(err) {
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http.NotFound(w, r)
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} else {
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http.Error(w, "server error",
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http.StatusInternalServerError)
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}
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return
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}
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defer f.Close()
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fi, err := f.Stat()
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if err != nil {
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http.Error(w, "server error", http.StatusInternalServerError)
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return
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}
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if fi.IsDir() {
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if pth[len(pth)-1] != '/' {
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http.Redirect(w, r,
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r.URL.Path+"/", http.StatusPermanentRedirect)
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return
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}
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ok := checkGroupPermissions(w, r, path.Dir(pth))
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if !ok {
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failAuthentication(w, "recordings/"+path.Dir(pth))
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return
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}
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if r.Method == "POST" {
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handleGroupAction(w, r, path.Dir(pth))
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} else {
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serveGroupRecordings(w, r, f, path.Dir(pth))
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}
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} else {
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ok := checkGroupPermissions(w, r, path.Dir(pth))
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if !ok {
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failAuthentication(w, "recordings/"+path.Dir(pth))
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return
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}
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http.ServeContent(w, r, r.URL.Path, fi.ModTime(), f)
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}
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}
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|
|
|
|
|
|
|
|
|
func handleGroupAction(w http.ResponseWriter, r *http.Request, group string) {
|
|
|
|
|
if r.Method != "POST" {
|
|
|
|
|
http.Error(w, "method not allowed", http.StatusMethodNotAllowed)
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
err := r.ParseForm()
|
|
|
|
|
if err != nil {
|
|
|
|
|
http.Error(w, "couldn't parse request", http.StatusBadRequest)
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
q := r.Form.Get("q")
|
|
|
|
|
|
|
|
|
|
switch q {
|
|
|
|
|
case "delete":
|
|
|
|
|
filename := r.Form.Get("filename")
|
|
|
|
|
if group == "" || filename == "" {
|
|
|
|
|
http.Error(w, "no filename provided",
|
|
|
|
|
http.StatusBadRequest)
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
err := os.Remove(
|
|
|
|
|
filepath.Join(recordingsDir, group+"/"+filename),
|
|
|
|
|
)
|
|
|
|
|
if err != nil {
|
|
|
|
|
if os.IsPermission(err) {
|
|
|
|
|
http.Error(w, "unauthorized",
|
|
|
|
|
http.StatusForbidden)
|
|
|
|
|
} else {
|
|
|
|
|
http.Error(w, "server error",
|
|
|
|
|
http.StatusInternalServerError)
|
|
|
|
|
}
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
http.Redirect(w, r, "/recordings/"+group+"/",
|
|
|
|
|
http.StatusSeeOther)
|
|
|
|
|
return
|
|
|
|
|
default:
|
|
|
|
|
http.Error(w, "unknown query", http.StatusBadRequest)
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func checkGroupPermissions(w http.ResponseWriter, r *http.Request, group string) bool {
|
|
|
|
|
desc, err := getDescription(group)
|
|
|
|
|
if err != nil {
|
|
|
|
|
return false
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
user, pass, ok := r.BasicAuth()
|
|
|
|
|
if !ok {
|
|
|
|
|
return false
|
|
|
|
|
}
|
|
|
|
|
|
2020-08-12 11:28:49 +02:00
|
|
|
p, err := getPermission(desc, clientCredentials{user, pass})
|
2020-05-31 20:03:22 +02:00
|
|
|
if err != nil || !p.Record {
|
|
|
|
|
return false
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return true
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
func serveGroupRecordings(w http.ResponseWriter, r *http.Request, f *os.File, group string) {
|
|
|
|
|
fis, err := f.Readdir(-1)
|
|
|
|
|
if err != nil {
|
|
|
|
|
http.Error(w, "server error", http.StatusInternalServerError)
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
w.Header().Set("content-type", "text/html; charset=utf-8")
|
|
|
|
|
w.Header().Set("cache-control", "no-cache")
|
|
|
|
|
|
|
|
|
|
if r.Method == "HEAD" {
|
|
|
|
|
return
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fmt.Fprintf(w, "<!DOCTYPE html>\n<html><head>\n")
|
|
|
|
|
fmt.Fprintf(w, "<title>Recordings for group %v</title>\n", group)
|
|
|
|
|
fmt.Fprintf(w, "<link rel=\"stylesheet\" type=\"text/css\" href=\"/common.css\"/>")
|
|
|
|
|
fmt.Fprintf(w, "<head><body>\n")
|
|
|
|
|
|
|
|
|
|
fmt.Fprintf(w, "<table>\n")
|
|
|
|
|
for _, fi := range fis {
|
|
|
|
|
if fi.IsDir() {
|
|
|
|
|
continue
|
|
|
|
|
}
|
|
|
|
|
fmt.Fprintf(w, "<tr><td><a href=\"%v\">%v</a></td><td>%d</td>",
|
|
|
|
|
html.EscapeString(fi.Name()),
|
|
|
|
|
html.EscapeString(fi.Name()),
|
|
|
|
|
fi.Size(),
|
|
|
|
|
)
|
|
|
|
|
fmt.Fprintf(w,
|
|
|
|
|
"<td><form action=\"/recordings/%v/?q=delete\" method=\"post\">"+
|
|
|
|
|
"<button type=\"submit\" name=\"filename\" value=\"%v\">Delete</button>"+
|
|
|
|
|
"</form></td></tr>\n",
|
|
|
|
|
url.PathEscape(group), fi.Name())
|
|
|
|
|
}
|
|
|
|
|
fmt.Fprintf(w, "</table>\n")
|
|
|
|
|
fmt.Fprintf(w, "</body></html>\n")
|
|
|
|
|
}
|
