374 lines
9.4 KiB
HTML
374 lines
9.4 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
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<html>
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<head>
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<title>WebRTC Autoresponder</title>
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This page should show a stream coming from a different browser.
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<script type="text/javascript">
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var local_name;
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var server;
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var my_id = -1;
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var other_peers = {};
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var request = null;
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var hanging_get = null;
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var pc = null;
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var local_stream = null;
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var call_state = 0;
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// 0 - Not started
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// 1 - Call ongoing
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// 2 - We have initiated closing the call
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// 3 - Other side has initiated closing the call
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// General
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function toggleExtraButtons() {
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document.getElementById("createPcBtn").hidden =
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!document.getElementById("createPcBtn").hidden;
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document.getElementById("addStreamBtn").hidden =
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!document.getElementById("addStreamBtn").hidden;
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}
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function trace(txt) {
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var elem = document.getElementById("debug");
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elem.innerHTML += txt + "<br>";
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}
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function trace_warning(txt) {
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var wtxt = "<b>" + txt + "</b>";
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trace(wtxt);
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}
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function setCallState(state) {
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trace("Changing call state: " + call_state + " -> " + state);
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call_state = state;
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}
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function checkPeerConnection() {
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if (!pc) {
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trace_warning("No PeerConnection object exists.");
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return 0;
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}
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return 1;
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}
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// Local stream generation
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function gotStream(s) {
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var url = webkitURL.createObjectURL(s);
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document.getElementById("localView").src = url;
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trace("User has granted access to webcam. url = " + url);
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local_stream = s;
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}
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function gotStreamFailed(error) {
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alert("Failed to get access to webcam. Error code was " + error.code);
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trace("Failed to get access to webcam. Error code was " + error.code);
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}
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// Call control
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function createPeerConnection() {
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if (pc) {
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trace_warning("PeerConnection object already exists.");
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}
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trace("Creating PeerConnection object.");
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pc = new webkitPeerConnection("STUN stun.l.google.com:19302",
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onSignalingMessage);
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pc.onaddstream = onAddStream;
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pc.onremovestream = onRemoveStream;
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}
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function startCall() {
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document.getElementById("startcall").disabled = true;
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createPeerConnection();
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addStream();
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}
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function addStream()
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{
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trace("Starting call. [pc.addStream(local_stream)]");
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pc.addStream(local_stream);
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document.getElementById("stopcall").disabled = false;
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}
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function stopCall() {
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document.getElementById("stopcall").disabled = true;
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trace("Stopping call [pc.close()]");
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setCallState(2);
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pc.close();
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}
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function test1() {
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addStream();
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}
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function callHasStarted() {
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setCallState(1);
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}
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// PeerConnection callbacks
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function onAddStream(e) {
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var stream = pc.remoteStreams[0];
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var url = webkitURL.createObjectURL(stream);
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document.getElementById("remoteView").src = url;
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trace("Started showing remote stream. url = " + url);
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setTimeout(callHasStarted, 5000); // TODO: Temp workaround, to be removed
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}
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function onRemoveStream(e) {
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// Currently if we get this callback, call has ended.
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document.getElementById("remoteView").src = "";
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trace("Stopped showing remote stream.");
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if (call_state == 2) {
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// Finalize close call. We assume here that this
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// callback comes after onSignalingMessage.
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pc = null;
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setCallState(0);
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document.getElementById("startcall").disabled = false;
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}
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}
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function onSignalingMessage(msg) {
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var peer_id = parseInt(document.getElementById("peer_id").value);
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trace("Sending message to " + other_peers[peer_id] +
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" (ID " + peer_id + "):\n" + msg);
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sendToPeer(peer_id, msg);
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}
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// Server interaction
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function handleServerNotification(data) {
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trace("Server notification: " + data);
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var parsed = data.split(",");
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if (parseInt(parsed[2]) != 0)
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other_peers[parseInt(parsed[1])] = parsed[0];
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}
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function handlePeerMessage(peer_id, msg) {
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trace("Received message from " + other_peers[peer_id] +
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" (ID " + peer_id + "):\n" + msg);
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// Assuming we have created a PeerConnection and that we receive the message
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// from the peer we want to communicate with
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document.getElementById("peer_id").value = peer_id;
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if (pc) {
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try {
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pc.processSignalingMessage(msg);
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} catch (e) {
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trace_warning("Signaling message error: " + e.description);
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}
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if (call_state == 1)
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setCallState(3);
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} else {
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createPeerConnection();
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pc.processSignalingMessage(msg);
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}
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}
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function getIntHeader(r, name) {
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var val = r.getResponseHeader(name);
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trace("header value: " + val);
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return val != null && val.length ? parseInt(val) : -1;
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}
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function hangingGetCallback() {
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try {
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if (hanging_get.readyState != 4)
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return;
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if (hanging_get.status != 200) {
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trace("server error, status: " + hanging_get.status +
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", text: " + hanging_get.statusText);
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disconnect();
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} else {
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var peer_id = getIntHeader(hanging_get, "Pragma");
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if (peer_id == my_id) {
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handleServerNotification(hanging_get.responseText);
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} else {
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handlePeerMessage(peer_id, hanging_get.responseText);
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}
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}
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if (hanging_get) {
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hanging_get.abort();
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hanging_get = null;
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}
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if (my_id != -1)
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window.setTimeout(startHangingGet, 0);
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} catch (e) {
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trace("Hanging get error: " + e.description);
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}
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}
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function onHangingGetTimeout() {
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trace("hanging get timeout. issuing again.");
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hanging_get.abort();
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hanging_get = null;
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if (my_id != -1)
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window.setTimeout(startHangingGet, 0);
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}
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function startHangingGet() {
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try {
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hanging_get = new XMLHttpRequest();
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hanging_get.onreadystatechange = hangingGetCallback;
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hanging_get.ontimeout = onHangingGetTimeout;
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hanging_get.open("GET", server + "/wait?peer_id=" + my_id, true);
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hanging_get.send();
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} catch (e) {
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trace("error" + e.description);
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}
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}
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function sendToPeer(peer_id, data) {
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if (my_id == -1) {
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alert("Not connected");
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return;
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}
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if (peer_id == my_id) {
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alert("Can't send a message to oneself :)");
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return;
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}
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var r = new XMLHttpRequest();
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r.open("POST", server + "/message?peer_id=" + my_id + "&to=" + peer_id,
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false);
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r.setRequestHeader("Content-Type", "text/plain");
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r.send(data);
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r = null;
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}
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function signInCallback() {
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try {
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if (request.readyState == 4) {
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if (request.status == 200) {
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var peers = request.responseText.split("\n");
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my_id = parseInt(peers[0].split(",")[1]);
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trace("My id: " + my_id);
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for (var i = 1; i < peers.length; ++i) {
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if (peers[i].length > 0) {
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trace("Peer " + i + ": " + peers[i]);
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var parsed = peers[i].split(",");
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other_peers[parseInt(parsed[1])] = parsed[0];
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}
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}
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startHangingGet();
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request = null;
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}
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}
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} catch (e) {
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trace("error: " + e.description);
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}
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}
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function signIn() {
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try {
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request = new XMLHttpRequest();
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request.onreadystatechange = signInCallback;
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request.open("GET", server + "/sign_in?" + local_name, true);
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request.send();
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} catch (e) {
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trace("error: " + e.description);
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}
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}
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function connect() {
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local_name = document.getElementById("local").value.toLowerCase();
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server = document.getElementById("server").value.toLowerCase();
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if (local_name.length == 0) {
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alert("I need a name please.");
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document.getElementById("local").focus();
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} else {
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document.getElementById("connect").disabled = true;
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document.getElementById("disconnect").disabled = false;
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signIn();
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}
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}
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function disconnect() {
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if (request) {
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request.abort();
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request = null;
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}
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if (hanging_get) {
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hanging_get.abort();
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hanging_get = null;
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}
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if (my_id != -1) {
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request = new XMLHttpRequest();
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request.open("GET", server + "/sign_out?peer_id=" + my_id, false);
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request.send();
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request = null;
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my_id = -1;
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}
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document.getElementById("connect").disabled = false;
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document.getElementById("disconnect").disabled = true;
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}
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function toggleLog()
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{
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document.getElementById('debug').hidden =!
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document.getElementById('debug').hidden;
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}
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window.onbeforeunload = disconnect;
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</script>
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</head>
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<body>
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<table border="0">
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<tr>
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<th align="left">Local Preview</th>
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<th align="left">Remote Video</th>
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</tr>
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<tr>
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<td><video width="320" height="240" id="localView" autoplay="autoplay">
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</video></td>
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<td><video width="640" height="480" id="remoteView" autoplay="autoplay">
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</video></td>
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</tr>
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<tr>
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<td valign="top">
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<form>
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Target peer ID: <input type="text" id="peer_id" size="3" value="1"/><br>
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<button id="startcall" onclick="startCall();">(4) Start call</button><br>
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<button id="stopcall" onclick="stopCall();" disabled="true">(5) Stop call
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</button><br>
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<!--<input type="button" value="Test 1" onclick="test1()"/><br>-->
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</form>
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</td>
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<td valign="top">
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<button onclick="toggleExtraButtons();">Toggle extra buttons</button><br>
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<button id="createPcBtn" onclick="createPeerConnection();" hidden="true">
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Create peer connection</button><br>
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<button id="addStreamBtn" onclick="addStream();" hidden="true">Add stream
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</button><br>
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</td>
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</tr>
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<tr><td colspan="2">
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(1) Server: <input type="text" id="server" value="http://localhost:8888" />
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<br>
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(2) Your name: <input type="text" id="local" value="responder"/>
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<button id="connect" onclick="connect();" disabled="true">(3) Connect</button>
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<button id="disconnect" onclick="disconnect();" disabled="true">(6) Disconnect
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</button>
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<br>
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<br>
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<button onclick="toggleLog()">Toggle view log</button>
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<button onclick="document.getElementById('debug').innerHTML='';">Clear log
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</button>
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<pre id="debug">
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</pre>
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</td></tr>
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</table>
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</body>
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<script>
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// On init, we connect to the server.
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connect();
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</script>
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</html>
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