earlzero.github.com/client2.html at master · earlzero/earlzero.github.com · GitHub

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<html>

<head>
    <title>Test</title>
</head>

<body>
    <video autoplay></video>

    <script>

        // const from = 1;
        // const to = 2;

        const from = 2;
        const to = 1;


        const remoteView = document.querySelector('video');

        class SignalingChannel {
            constructor(url) {
                this.url = url;
                this.socket = new WebSocket(url);
            }

            send(data) {
                var socket = this.socket;

                socket.send(JSON.stringify(data))
                // socket.addEventListener('open', function (msg) {
                //     console.log("sending")
                //     socket.send(msg);
                // });
            }

            addListener(handler) {
                this.socket.addEventListener('message', handler);
            }
        };


        const signaling = new SignalingChannel(`ws://192.168.1.205:8080/?from=${from}&to=${to}`);
        const constraints = { audio: false, video: true };
        const configuration = { iceServers: [{ urls: 'stun:stun.iptel.org' }] };
        const pc = new RTCPeerConnection(configuration);

        pc.onicecandidate = ({ candidate }) => {
            console.log(`ice candidate ${JSON.stringify(candidate)}`)
            let msg = { "id": to, "body": JSON.stringify({ "type": "candidate", "body": candidate }) }
            signaling.send(msg)
        };


        pc.onnegotiationneeded = async () => {
            console.log('Negotiation is needed')
            try {
                await pc.setLocalDescription(await pc.createOffer());
                // send the offer to the other peer
                let msg = { "id": to, "body": JSON.stringify({ "type": "desc", "body": pc.localDescription }) }
                signaling.send(msg);
                // signaling.send({ desc: pc.localDescription });
            } catch (err) {
                console.error(err);
            }
        };

        pc.ontrack = (event) => {
            // don't set srcObject again if it is already set.
            if (remoteView.srcObject) return;
            remoteView.srcObject = event.streams[0];
            console.log("New track received")
        };


        async function start() {
            try {
                // get local stream, show it in self-view and add it to be sent
                const stream =
                    await navigator.mediaDevices.getUserMedia(constraints);
                stream.getTracks().forEach((track) =>
                    pc.addTrack(track, stream));
                // selfView.srcObject = stream;
            } catch (err) {
                console.error(err);
            }
        }


        const listener = async (data) => {
            try {
                console.log(`Signaling message received ${JSON.stringify(data)}`)
                if (data.body != null) {
                    var obj = JSON.parse(data.body)
                    if (obj.type == "desc") {
                        desc = obj;
                        // if we get an offer, we need to reply with an answer
                        if (desc.type === 'offer') {
                            await pc.setRemoteDescription(desc);
                            const stream =
                                await navigator.mediaDevices.getUserMedia(constraints);
                            stream.getTracks().forEach((track) =>
                                pc.addTrack(track, stream));
                            await pc.setLocalDescription(await pc.createAnswer());


                            let msg = { "id": to, "body": JSON.stringify({ "type": "desc", "body": pc.localDescription }) }
                            signaling.send(msg);
                        } else if (desc.type === 'answer') {
                            await pc.setRemoteDescription(desc);
                        } else {
                            console.log('Unsupported SDP type.');
                        }
                    } else if (obj.type == "candidate") {
                        await pc.addIceCandidate(obj);
                    }
                }
            } catch (err) {
                console.error(err);
            }
        };

        signaling.addListener(data => {
            console.log("adding listener again")
            listener(data).then(res => {
                console.log("Finished")
            });
        });

        start().then(result => console.log("started"));

    </script>
</body>

</html>