webrtc-java-experimental-server/wsclient.html at master · Charles92011/webrtc-java-experimental-server · GitHub

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<!DOCTYPE html>
<html>
	<head>
		<title>WebSocketClient</title>

		<style type="text/css">
			video
			{
				width: 320px;
				border:1px solid black;
			}
		</style>

	</head>

	<body>
		<div>
			<span id="sessionIdSpan">sessionid</span><br/>
			<video id="localVideo" autoplay playsinline muted></video><br/>
			<button type="button" id="startButton">Start</button>
			<button type="button" id="mirrorButton" disabled>mirror</button>
			<button type="button" id="connectButton" disabled>connect</button>
			<button type="button" id="recordButton" disabled>Record</button>
		</div>
		<div id="remoteVideos">
		</div>

		<script type="text/javascript">

			'use strict';

			const startButton = document.getElementById('startButton');
			startButton.addEventListener('click', clickStart);

			const mirrorButton = document.getElementById('mirrorButton');
			mirrorButton.addEventListener('click', clickMirror);

			const connectButton = document.getElementById('connectButton');
			connectButton.addEventListener('click', clickConnect);

			const recordButton = document.getElementById('recordButton');
			recordButton.addEventListener('click', clickRecord);

			const offerOptions = {offerToReceiveVideo:1, offerToReceiveAudio:1};

			const iceServers = {
				'iceServers': [
					{'url': 'stun:stun.l.google.com:19302'}
				]};
			const signallingServer = 'ws://localhost:1969/';

			const localVideo = document.getElementById('localVideo');
			const remoteVideos = document.getElementById('remoteVideos');

			const peerConnection = new RTCPeerConnection(iceServers);
			peerConnection.addEventListener('icecandidate', onIceCandidate);
			peerConnection.addEventListener('track', onTrack);
			peerConnection.addEventListener('negotiationneeded', onNegotiationNeeded);

			let webSocket;
			let sessionId;

			function clickStart(event) {

				const mediaStreamConstraints = {video: true, audio: true};

				navigator.mediaDevices.getUserMedia(mediaStreamConstraints)
				.then((mediaStream) => {

					localVideo.srcObject = mediaStream;
					connectToServer();
				});
			}


			function clickMirror(event) {

				const payload = '{"message":"mirror"}';
				console.log(payload);
				webSocket.send(payload);

			}

			function clickRecord(event) {

				const payload = '{"message":"record"}';
				console.log(payload);
				webSocket.send(payload);

				recordButton.disabled = true;

			}

			function clickConnect(event) {

				const sessionToConnect = prompt("Session To Connect", "sessionId");
				const payload = '{"message":"connect", "sessionid":\"' + sessionToConnect + '\"}';

				if (sessionToConnect == null) return;	// cancel pressed
				if (sessionToConnect == '') return;		// blank entry

				console.log(payload);

				webSocket.send(payload);

			}

			function connectToServer()
			{
				webSocket = new WebSocket(signallingServer);

				// upon opening the server will send a greeting message
				webSocket.addEventListener('open', onSocketOpen);
				webSocket.addEventListener('message', onSocketMessage);
				webSocket.addEventListener('close', onSocketClose);
			}

			function onSocketOpen(event){

				console.log('socket opened');
			}

			function onSocketMessage(event) {

				const payload = JSON.parse(event.data);
				const message = payload.message;

				console.log('Message from server ' + message);

				if (message == "greeting") {

					sessionId = payload.sessionid;
					const sessionIdSpan = document.getElementById('sessionIdSpan');
					sessionIdSpan.innerHTML = sessionId;

					// this will cause negotiation needed to trigger
					const mediaStream = localVideo.srcObject;
					for (const track of mediaStream.getTracks()) peerConnection.addTrack(track, mediaStream);

					mirrorButton.disabled = false;
					connectButton.disabled = false;
					recordButton.disabled = false;
					startButton.disabled = true;
				}

				if (message == "answer") {

					const sdp = payload.sdp;

					peerConnection.setRemoteDescription(sdp)
					.then(() => {
						console.log('remote description set');

					});
				}

				if (message == "icecandidate") {

					const candidate = payload.candidate;

					console.log('addIceCandidate');

					peerConnection.addIceCandidate(candidate);
				}

				if (message == "negotiate") {
					negotiate();
				}

				if (message == "recording") {

					const recording = payload.recording;

					if (recording == "true") {
						recordButton.innerText = 'Pause';
					} else {

						recordButton.innerText = 'Record';
					}

					recordButton.disabled = false;
				}
			}

			function onSocketClose(event) {

				console.log('socket closed');

				mirrorButton.disabled = true;
				connectButton.disabled = true;
				recordButton.disabled = true;
				startButton.disabled = false;

			}


			function onIceCandidate(event) {

				const peerConnection = event.target;
				const candidate = event.candidate;

				if (candidate != null)
				{
					const payload = '{"message":"icecandidate", "candidate":' + JSON.stringify(candidate) + '}';

					console.log('onIceCandidate:' + payload);

					webSocket.send(payload);

				}
			}

			function onNegotiationNeeded(event) {

				negotiate();
			}

			function onTrack(event) {

				console.log('Add Track');

				let remoteVideo = document.getElementById('remoteVideo');
				let remoteStream;

				if (remoteVideo) {

					remoteStream = remoteVideo.srcObject;

				} else {

					remoteStream = new MediaStream();

					remoteVideo = document.createElement('video');
					remoteVideo.id = 'remoteVideo';
					remoteVideo.autoplay = true;
					remoteVideo.playsinline = true;
					remoteVideo.srcObject = remoteStream;

					remoteVideos.appendChild(remoteVideo);
				}

				remoteStream.addTrack(event.track);
			}

			function negotiate() {

				console.log("negotiating");

				//mirrorButton.disabled = true;
				//connectButton.disabled = true;

				peerConnection.createOffer(offerOptions)
				.then ((description) =>  {

					peerConnection.setLocalDescription(description)
					.then(() => {

						console.log('local peer description set');
						const payload = '{"message":"offer", "sdp":' + JSON.stringify(description) + '}';

						console.log('sending offer');

						webSocket.send(payload);

					})
				});

			}


		</script>
	</body>
</html>