serve tls traffic and static files to view webcam locally and open websocket conn
bel
parent
dda64da85e
commit
2388723fa5
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@ -1,6 +1,8 @@
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entropy
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vendor
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exec-entropy
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**.sw*
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**/**.sw*
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*.sw*
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**/*.sw*
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testdata
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@ -0,0 +1,17 @@
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package main
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import "local/args"
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func config() *args.ArgSet {
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as := args.NewArgSet()
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as.Append(args.INT, "p", "port to listen on", "58080")
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as.Append(args.STRING, "d", "root dir to serve static", ".")
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as.Append(args.STRING, "crt", "path to crt", "./cert.crt")
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as.Append(args.STRING, "key", "path to key", "./cert.key")
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if err := as.Parse(); err != nil {
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panic(err)
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}
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return as
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}
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@ -0,0 +1,34 @@
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package main
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import (
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"crypto/tls"
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"fmt"
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"log"
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"net/http"
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)
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func main() {
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as := config()
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httpsServer := &http.Server{
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Addr: fmt.Sprintf(":%d", as.GetInt("p")),
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Handler: New(),
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TLSConfig: &tls.Config{
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MinVersion: tls.VersionTLS12,
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CurvePreferences: []tls.CurveID{tls.CurveP521, tls.CurveP384, tls.CurveP256},
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PreferServerCipherSuites: true,
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CipherSuites: []uint16{
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tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
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tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
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tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
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tls.TLS_RSA_WITH_AES_256_CBC_SHA,
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},
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},
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TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler), 0),
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}
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c := as.GetString("crt")
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k := as.GetString("key")
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log.Printf("listening on %q", httpsServer.Addr)
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if err := httpsServer.ListenAndServeTLS(c, k); err != nil {
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panic(err)
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}
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}
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@ -0,0 +1,27 @@
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<!DOCTYPE html>
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<html>
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<head>
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<script src="https://webrtc.github.io/adapter/adapter-latest.js"></script>
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<script src="webrtc.js"></script>
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<style>
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video {
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max-width: 100%;
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min-width: 100%;
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border: 1px solid black;
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}
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</style>
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</head>
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<body>
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<video id="localVideo" autoplay muted ></video>
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<video id="remoteVideo" autoplay ></video>
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<br />
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<input type="button" id="start" onclick="start(true)" value="Start Video"></input>
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<script type="text/javascript">
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pageReady();
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</script>
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</body>
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</html>
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@ -0,0 +1,103 @@
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var localVideo;
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var localStream;
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var remoteVideo;
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var peerConnection;
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var uuid;
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var serverConnection;
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var peerConnectionConfig = {
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'iceServers': [
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{'urls': 'stun:stun.stunprotocol.org:3478'},
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{'urls': 'stun:stun.l.google.com:19302'},
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]
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};
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function pageReady() {
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uuid = createUUID();
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localVideo = document.getElementById('localVideo');
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remoteVideo = document.getElementById('remoteVideo');
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serverConnection = new WebSocket('wss://' + window.location.hostname + '/abc');
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serverConnection.onmessage = gotMessageFromServer;
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var constraints = {
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video: true,
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audio: true,
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};
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if(navigator.mediaDevices.getUserMedia) {
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navigator.mediaDevices.getUserMedia(constraints).then(getUserMediaSuccess).catch(errorHandler);
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} else {
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alert('Your browser does not support getUserMedia API');
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}
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}
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function getUserMediaSuccess(stream) {
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localStream = stream;
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localVideo.srcObject = stream;
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}
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function start(isCaller) {
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peerConnection = new RTCPeerConnection(peerConnectionConfig);
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peerConnection.onicecandidate = gotIceCandidate;
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peerConnection.ontrack = gotRemoteStream;
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peerConnection.addStream(localStream);
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if(isCaller) {
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peerConnection.createOffer().then(createdDescription).catch(errorHandler);
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}
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}
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function gotMessageFromServer(message) {
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if(!peerConnection) start(false);
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var signal = JSON.parse(message.data);
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// Ignore messages from ourself
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if(signal.uuid == uuid) return;
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if(signal.sdp) {
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peerConnection.setRemoteDescription(new RTCSessionDescription(signal.sdp)).then(function() {
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// Only create answers in response to offers
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if(signal.sdp.type == 'offer') {
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peerConnection.createAnswer().then(createdDescription).catch(errorHandler);
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}
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}).catch(errorHandler);
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} else if(signal.ice) {
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peerConnection.addIceCandidate(new RTCIceCandidate(signal.ice)).catch(errorHandler);
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}
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}
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function gotIceCandidate(event) {
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if(event.candidate != null) {
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serverConnection.send(JSON.stringify({'ice': event.candidate, 'uuid': uuid}));
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}
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}
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function createdDescription(description) {
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console.log('got description');
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peerConnection.setLocalDescription(description).then(function() {
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serverConnection.send(JSON.stringify({'sdp': peerConnection.localDescription, 'uuid': uuid}));
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}).catch(errorHandler);
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}
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function gotRemoteStream(event) {
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console.log('got remote stream');
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remoteVideo.srcObject = event.streams[0];
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}
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function errorHandler(error) {
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console.log(error);
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}
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// Taken from http://stackoverflow.com/a/105074/515584
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// Strictly speaking, it's not a real UUID, but it gets the job done here
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function createUUID() {
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function s4() {
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return Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
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}
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return s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
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}
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@ -0,0 +1,31 @@
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package main
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import (
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"log"
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"net/http"
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"os"
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"path"
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)
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type Server struct {
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fs http.Handler
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ws *WS
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}
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func New() *Server {
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fs := http.FileServer(http.Dir(config().GetString("d")))
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return &Server{
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fs: fs,
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ws: NewWS(),
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}
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}
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func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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log.Println("serving", r.URL)
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if _, err := os.Stat(path.Join(config().GetString("d"), r.URL.Path[1:])); os.IsNotExist(err) {
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s.ws.ServeHTTP(w, r)
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} else {
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log.Printf("Serving static %q from %q", r.URL.Path, config().GetString("d"))
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s.fs.ServeHTTP(w, r)
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}
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}
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@ -0,0 +1,53 @@
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package main
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import (
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"io"
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"log"
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"net/http"
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"github.com/gorilla/websocket"
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)
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type WS struct {
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upgrader websocket.Upgrader
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}
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func NewWS() *WS {
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return &WS{
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upgrader: websocket.Upgrader{
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ReadBufferSize: 10240,
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WriteBufferSize: 10240,
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CheckOrigin: func(_ *http.Request) bool { return true },
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},
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}
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}
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func (ws *WS) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if err := ws.serveHTTP(w, r); err != nil {
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log.Println(r.URL.Path, err)
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http.Error(w, err.Error(), http.StatusInternalServerError)
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}
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}
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func (ws *WS) serveHTTP(w http.ResponseWriter, r *http.Request) error {
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conn, err := ws.upgrader.Upgrade(w, r, nil)
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if err != nil {
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return err
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}
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for {
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mt, r, err := conn.NextReader()
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if err != nil {
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return err
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}
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w, err := conn.NextWriter(mt)
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if err != nil {
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return err
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}
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if _, err := io.Copy(w, r); err != nil { // todo impl broadcast to channel;; sync map to all channels, goes to a forking reader-writer pipe, all listeners to broadcast read from pipe
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return err
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}
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if err := w.Close(); err != nil {
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return err
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}
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}
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}
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