106 lines
2.9 KiB
JavaScript
Executable File
106 lines
2.9 KiB
JavaScript
Executable File
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let _s = {
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localVideo: undefined,
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localStream: undefined,
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remoteVideo: undefined,
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peerConnection: undefined,
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uuid: undefined,
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serverConnection: undefined
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};
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const 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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_s.uuid = createUUID();
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_s.localVideo = document.getElementById('localVideo');
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_s.remoteVideo = document.getElementById('remoteVideo');
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_s.serverConnection = new WebSocket('wss://' + window.location.hostname + ':8443');
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_s.serverConnection.onmessage = gotMessageFromServer;
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const 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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_s.localStream = stream;
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_s.localVideo.srcObject = stream;
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}
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function start(isCaller) {
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_s.peerConnection = new RTCPeerConnection(peerConnectionConfig);
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_s.peerConnection.onicecandidate = gotIceCandidate;
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_s.peerConnection.ontrack = gotRemoteStream;
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_s.peerConnection.addStream(_s.localStream);
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if(isCaller) {
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_s.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(!_s.peerConnection) start(false);
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const signal = JSON.parse(message.data);
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// Ignore messages from ourself
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if(signal.uuid == _s.uuid) return;
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if(signal.sdp) {
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_s.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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_s.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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_s.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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_s.serverConnection.send(JSON.stringify({'ice': event.candidate, 'uuid': _s.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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_s.peerConnection.setLocalDescription(description).then(function() {
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_s.serverConnection.send(JSON.stringify({'sdp': _s.peerConnection.localDescription, 'uuid': _s.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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_s.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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