golanggohlsrtmpwebrtcmedia-serverobs-studiortcprtmp-proxyrtmp-serverrtprtsprtsp-proxyrtsp-relayrtsp-serversrtstreamingwebrtc-proxy
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257 lines
6.5 KiB
257 lines
6.5 KiB
<!DOCTYPE html> |
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<html> |
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<head> |
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<meta charset="utf-8"> |
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<meta name="viewport" content="width=device-width"> |
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<style> |
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html, body { |
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margin: 0; |
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padding: 0; |
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height: 100%; |
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overflow: hidden; |
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} |
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#video { |
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width: 100%; |
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height: 100%; |
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background: 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="video" muted controls autoplay playsinline></video> |
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<script> |
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const restartPause = 2000; |
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const unquoteCredential = (v) => ( |
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JSON.parse(`"${v}"`) |
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); |
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const linkToIceServers = (links) => ( |
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(links !== null) ? links.split(', ').map((link) => { |
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const m = link.match(/^<(.+?)>; rel="ice-server"(; username="(.*?)"; credential="(.*?)"; credential-type="password")?/i); |
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const ret = { |
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urls: [m[1]], |
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}; |
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if (m[3] !== undefined) { |
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ret.username = unquoteCredential(m[3]); |
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ret.credential = unquoteCredential(m[4]); |
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ret.credentialType = "password"; |
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} |
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return ret; |
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}) : [] |
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); |
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const parseOffer = (offer) => { |
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const ret = { |
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iceUfrag: '', |
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icePwd: '', |
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medias: [], |
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}; |
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for (const line of offer.split('\r\n')) { |
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if (line.startsWith('m=')) { |
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ret.medias.push(line.slice('m='.length)); |
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} else if (ret.iceUfrag === '' && line.startsWith('a=ice-ufrag:')) { |
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ret.iceUfrag = line.slice('a=ice-ufrag:'.length); |
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} else if (ret.icePwd === '' && line.startsWith('a=ice-pwd:')) { |
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ret.icePwd = line.slice('a=ice-pwd:'.length); |
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} |
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} |
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return ret; |
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}; |
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const generateSdpFragment = (offerData, candidates) => { |
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const candidatesByMedia = {}; |
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for (const candidate of candidates) { |
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const mid = candidate.sdpMLineIndex; |
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if (candidatesByMedia[mid] === undefined) { |
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candidatesByMedia[mid] = []; |
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} |
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candidatesByMedia[mid].push(candidate); |
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} |
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let frag = 'a=ice-ufrag:' + offerData.iceUfrag + '\r\n' |
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+ 'a=ice-pwd:' + offerData.icePwd + '\r\n'; |
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let mid = 0; |
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for (const media of offerData.medias) { |
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if (candidatesByMedia[mid] !== undefined) { |
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frag += 'm=' + media + '\r\n' |
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+ 'a=mid:' + mid + '\r\n'; |
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for (const candidate of candidatesByMedia[mid]) { |
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frag += 'a=' + candidate.candidate + '\r\n'; |
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} |
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} |
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mid++; |
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} |
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return frag; |
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} |
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class WHEPClient { |
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constructor() { |
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this.pc = null; |
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this.restartTimeout = null; |
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this.eTag = ''; |
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this.queuedCandidates = []; |
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this.start(); |
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} |
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start() { |
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console.log("requesting ICE servers"); |
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fetch(new URL('whep', window.location.href) + window.location.search, { |
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method: 'OPTIONS', |
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}) |
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.then((res) => this.onIceServers(res)) |
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.catch((err) => { |
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console.log('error: ' + err); |
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this.scheduleRestart(); |
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}); |
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} |
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onIceServers(res) { |
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this.pc = new RTCPeerConnection({ |
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iceServers: linkToIceServers(res.headers.get('Link')), |
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}); |
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const direction = "sendrecv"; |
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this.pc.addTransceiver("video", { direction }); |
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this.pc.addTransceiver("audio", { direction }); |
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this.pc.onicecandidate = (evt) => this.onLocalCandidate(evt); |
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this.pc.oniceconnectionstatechange = () => this.onConnectionState(); |
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this.pc.ontrack = (evt) => { |
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console.log("new track:", evt.track.kind); |
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document.getElementById("video").srcObject = evt.streams[0]; |
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}; |
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this.pc.createOffer() |
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.then((offer) => this.onLocalOffer(offer)); |
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} |
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onLocalOffer(offer) { |
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this.offerData = parseOffer(offer.sdp); |
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this.pc.setLocalDescription(offer); |
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console.log("sending offer"); |
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fetch(new URL('whep', window.location.href) + window.location.search, { |
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method: 'POST', |
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headers: { |
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'Content-Type': 'application/sdp', |
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}, |
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body: offer.sdp, |
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}) |
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.then((res) => { |
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if (res.status !== 201) { |
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throw new Error('bad status code'); |
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} |
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this.eTag = res.headers.get('E-Tag'); |
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return res.text(); |
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}) |
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.then((sdp) => this.onRemoteAnswer(new RTCSessionDescription({ |
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type: 'answer', |
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sdp, |
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}))) |
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.catch((err) => { |
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console.log('error: ' + err); |
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this.scheduleRestart(); |
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}); |
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} |
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onConnectionState() { |
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if (this.restartTimeout !== null) { |
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return; |
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} |
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console.log("peer connection state:", this.pc.iceConnectionState); |
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switch (this.pc.iceConnectionState) { |
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case "disconnected": |
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this.scheduleRestart(); |
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} |
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} |
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onRemoteAnswer(answer) { |
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if (this.restartTimeout !== null) { |
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return; |
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} |
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this.pc.setRemoteDescription(new RTCSessionDescription(answer)); |
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if (this.queuedCandidates.length !== 0) { |
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this.sendLocalCandidates(this.queuedCandidates); |
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this.queuedCandidates = []; |
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} |
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} |
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onLocalCandidate(evt) { |
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if (this.restartTimeout !== null) { |
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return; |
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} |
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if (evt.candidate !== null) { |
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if (this.eTag === '') { |
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this.queuedCandidates.push(evt.candidate); |
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} else { |
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this.sendLocalCandidates([evt.candidate]) |
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} |
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} |
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} |
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sendLocalCandidates(candidates) { |
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fetch(new URL('whep', window.location.href) + window.location.search, { |
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method: 'PATCH', |
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headers: { |
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'Content-Type': 'application/trickle-ice-sdpfrag', |
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'If-Match': this.eTag, |
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}, |
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body: generateSdpFragment(this.offerData, candidates), |
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}) |
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.then((res) => { |
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if (res.status !== 204) { |
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throw new Error('bad status code'); |
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} |
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}) |
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.catch((err) => { |
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console.log('error: ' + err); |
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this.scheduleRestart(); |
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}); |
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} |
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scheduleRestart() { |
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if (this.restartTimeout !== null) { |
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return; |
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} |
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if (this.pc !== null) { |
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this.pc.close(); |
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this.pc = null; |
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} |
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this.restartTimeout = window.setTimeout(() => { |
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this.restartTimeout = null; |
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this.start(); |
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}, restartPause); |
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this.eTag = ''; |
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this.queuedCandidates = []; |
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} |
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} |
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window.addEventListener('DOMContentLoaded', () => new WHEPClient()); |
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</script> |
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</body> |
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</html>
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