WEB-RTC-basic-tutorial/callee.html at master · judelove/WEB-RTC-basic-tutorial · GitHub

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<!DOCTYPE html>
<html>
<head>
    <title>Basic camera</title>
    <script type="text/javascript">
        var peerConnection2;
        var sdpConstraints = { 'mandatory': { 'OfferToReceiveAudio': true, 'OfferToReceiveVideo': true } };

        let con = new WebSocket("ws://localhost:8080");


        con.onopen = function (e) {
            //some sort of registration
            sendMessage(
                JSON.stringify(
                    {
                        sender: "callee"
                    }
                ));
            start();
        }

        function sendMessage(msg) {
            con.send(msg);
        }

        con.onmessage = function (event) {
            event.data.text().then(
                txt => {
                    console.log(txt);
                    //alert(`[meData received from server: ${txt}`);
                    //gotDescription2(JSON.parse(txt));
                    routeMessage(JSON.parse(txt));
                });

        }

        con.onclose = function (event) {
            if (event.wasClean) {
                alert(`[close] Connection closed cleanly, code=${event.reason}`);
            } else {
                // e.g. server proces
                // event.code is usually 1006 in this case
                alert('[close] Connection died');
            }
        };

        con.onerror = function (error) {
            alert(`[error] ${error.message}`);
        };

        function routeMessage(msg) {
            if (msg.type == "ice-candidate") {
                handleIceCandidate(msg.payload);
            }
            else if (msg.type == "offer-answer") {

            }
            else if (msg.type == "offer") {
                gotRemoteDescription(msg.payload);
            }
        }


        function gotRemoteStream(e) {
            calleeVideo = document.getElementById("calleeVideo");
            calleeVideo.srcObject = e.stream;
            alert(e.stream.getVideoTracks().length);
            //calleeVideo.play();
        }

        function start() {
            servers = null; //{ iceServers: [ urls: "1123@localhost:8080"] };
            peerConnection2 = new RTCPeerConnection(servers);
            peerConnection2.onicecandidate = iceCallback;
            peerConnection2.onaddstream = gotRemoteStream;
            peerConnection2.ontrack = handleTrackEvent;
        }

        function handleTrackEvent(event) {
            calleeVideo = document.getElementById("calleeVideo");
            calleeVideo.srcObject = event.streams[0];
            calleeVideo.play();
        }

        function gotRemoteDescription(desc) {
            peerConnection2.setRemoteDescription(desc);
            peerConnection2.createAnswer(gotLocalDescription, function () { alert('an error !'); }, sdpConstraints);

        }

        function gotLocalDescription(desc) {
            peerConnection2.setLocalDescription(desc);
            //SEND THE ANSWER HERE
            sendMessage(JSON.stringify(
                {
                    sender: "callee",
                    recipient: "caller",
                    type: "offer-answer",
                    payload: desc
                }));
            //peerConnection1.setRemoteDescription(desc);
        }

        function hangup() {

            peerConnection2.close();
        }

        function handleIceCandidate(candidate) {
            if (candidate) {
                peerConnection2.addIceCandidate(new RTCIceCandidate(candidate));
            }

        }

        function iceCallback(event) {
            if (event.candidate) {
                sendMessage(
                    JSON.stringify(
                        {
                            sender: "callee",
                            recipient: "caller",
                            type: "ice-candidate",
                            payload: event.candidate
                        }
                    )
                )
                //peerConnection1.addIceCandidate(new RTCIceCandidate(event.candidate));
            }
        }


    </script>
</head>
<body>

    <button id="hangup" onclick="hangup()">Hangup</button>
    <video id="calleeVideo" autoplay="true" />
</body>