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client.js
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client.js
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var pc = null;
var localVideo = document.querySelector("video#localVideo");
var serverVideo = document.querySelector("video#serverVideo");
navigator.mediaDevices.getUserMedia({
video: {
height: 360,
width: 480,
}
}).then(stream => {
localVideo.srcObject = stream;
localVideo.addEventListener('loadedmetadata', () => {
localVideo.play();
});
});
function negotiate () {
return pc.createOffer().then(function (offer) {
return pc.setLocalDescription(offer);
}).then(function () {
// wait for ICE gathering to complete
return new Promise(function (resolve) {
if (pc.iceGatheringState === 'complete') {
resolve();
} else {
function checkState () {
if (pc.iceGatheringState === 'complete') {
pc.removeEventListener('icegatheringstatechange', checkState);
resolve();
}
}
pc.addEventListener('icegatheringstatechange', checkState);
}
});
}).then(function () {
var offer = pc.localDescription;
return fetch('/offer', {
body: JSON.stringify({
sdp: offer.sdp,
type: offer.type,
}),
headers: {
'Content-Type': 'application/json'
},
method: 'POST'
});
}).then(function (response) {
return response.json();
}).then(function (answer) {
return pc.setRemoteDescription(answer);
}).catch(function (e) {
alert(e);
});
}
function start () {
var config = {
sdpSemantics: 'unified-plan',
iceServers: [{ urls: ['stun:stun.l..com:19302'] }]
};
pc = new RTCPeerConnection(config);
localVideo.srcObject.getVideoTracks().forEach(track => {
pc.addTrack(track);
});
pc.addEventListener('track', function (evt) {
console.log("receive server video");
if (evt.track.kind == 'video') {
serverVideo.srcObject = evt.streams[0];
}
});
document.getElementById('start').style.display = 'none';
negotiate();
document.getElementById('stop').style.display = 'inline-block';
}
function stop () {
document.getElementById('stop').style.display = 'none';
setTimeout(function () {
pc.close();
}, 500);
}