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<!DOCTYPE html>
< html style = height:100% >
< head >
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< title > MeshMessenger< / title >
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< meta http-equiv = X-UA-Compatible content = "IE=edge" >
< meta content = "text/html;charset=utf-8" http-equiv = Content-Type >
< meta name = format-detection content = "telephone=no" >
< link type = "text/css" href = "styles/style.css" media = "screen" rel = "stylesheet" title = "CSS" / >
< script type = "text/javascript" src = "scripts/common-0.0.1.js" > < / script >
< / head >
< body style = "font-family:Arial,Helvetica,sans-serif" >
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< div id = "xtop" style = "position:absolute;left:0;right:0;top:0;height:30px;background-color:#036;color:#c8c8c8" > < div style = "padding-top:6px;padding-left:6px;font-size:medium" > < b > MeshMessenger< span id = "xtitle" > < / span > < / b > < / div > < / div >
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< div id = "xmiddle" style = "position:absolute;left:0;right:0;top:30px;bottom:30px" >
< div id = "xmsg" style = "position:absolute;left:0;right:0;top:0px;bottom:0px;padding:5px;overflow-y:scroll" > < / div >
< / div >
< div id = "xbottom" style = "position:absolute;left:0;right:0;bottom:0px;height:30px;background-color:#036" >
< div style = "position:absolute;left:5px;right:215px;bottom:4px;top:4px;background-color:aliceblue" > < input id = "xouttext" type = "text" style = "width:calc(100% - 5px)" onfocus = onUserInputFocus(1) onblur = onUserInputFocus(0) / > < / div >
< input type = "button" id = "sendButton" value = "Send" style = "position:absolute;right:110px;width:100px;top:4px;" onclick = "xsend(event)" / >
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< input type = "button" id = "clearButton" value = "Clear" style = "position:absolute;right:5px;width:100px;top:4px;" onclick = "displayClear()" / >
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< / div >
< script type = "text/javascript" >
var userInputFocus = 0;
var controlsEnabled = true;
var args = parseUriArgs();
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var socket = null; // Websocket object
var state = 0; // Connection state. 0 = Disconnected, 1 = Connecting, 2 = Connected.
var random = Math.random(); // Selected random, larger value initiates WebRTC.
var webrtc = null; // Main WebRTC object
var webchannel = null; // WebRTC data channel
var webrtcconfiguration = null; //{ "iceServers": [ { 'urls': 'stun:stun.services.mozilla.com' }, { 'urls': 'stun:stun.l.google.com:19302' } ] };
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// Set the title
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if (args.title) { QH('xtitle', ' - ' + args.title); document.title = document.title + ' - ' + args.title; }
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// Trap document key presses
document.onkeypress = function ondockeypress(e) {
if (controlsEnabled == true) {
if ((e.keyCode == 8) & & (userInputFocus == 0)) {
// Backspace
var outtext = Q('xouttext').value;
if (outtext.length > 0) { Q('xouttext').value = outtext.substring(0, outtext.length - 1); }
} else if (e.keyCode == 13) {
// Return
xsend(e);
} else {
// Any other key
if ((userInputFocus == 0) & & (e.key.length == 1)) { Q('xouttext').value = Q('xouttext').value + e.key; }
}
}
if (userInputFocus == 0) { haltEvent(e); return false; }
}
function onUserInputFocus(x) { userInputFocus = x; }
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function displayClear() { QH('xmsg', ''); }
// Display a control message
function displayControl(msg) {
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QA('xmsg', '< div style = "clear:both" > < div style = "color:gray;float:left;margin-bottom:2px" > ' + msg + '< / div > < div > < / div > < / div > ');
Q('xmsg').scrollTop = Q('xmsg').scrollHeight;
}
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// Display a message from the remote user
function displayRemote(msg) {
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QA('xmsg', '< div style = "clear:both" > < div style = "background-color:#00cc99;color:black;border-radius:5px;padding:5px;float:left;margin-bottom:5px;margin-right:20px" > ' + msg + '< / div > < div > < / div > < / div > ');
Q('xmsg').scrollTop = Q('xmsg').scrollHeight;
}
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// Display and send a message from the local user
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function xsend(event) {
var outtext = Q('xouttext').value;
if (outtext.length > 0) {
Q('xouttext').value = '';
QA('xmsg', '< div style = "clear:both" > < div style = "background-color:#0099ff;color:black;border-radius:5px;padding:5px;float:right;margin-bottom:5px;margin-left:20px" > ' + outtext + '< / div > < div > < / div > < / div > ');
Q('xmsg').scrollTop = Q('xmsg').scrollHeight;
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send({ action: 'chat', msg: outtext });
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}
}
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// Enable user controls
function enableControls(lock) { controlsEnabled = lock; QE('sendButton', lock); QE('clearButton', lock); QE('xouttext', lock); }
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function haltEvent(e) { if (e.preventDefault) e.preventDefault(); if (e.stopPropagation) e.stopPropagation(); return false; }
function parseUriArgs() { var name, r = {}, parsedUri = window.document.location.href.split(/[\?&|\=]/); parsedUri.splice(0, 1); for (x in parsedUri) { switch (x % 2) { case 0: { name = parsedUri[x]; break; } case 1: { r[name] = parsedUri[x]; var x = parseInt(r[name]); if (x == r[name]) { r[name] = x; } break; } } } return r; }
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// This is the WebRTC setup
function startWebRTC(description) {
// Setup the WebRTC object
if (webrtc == null) {
if (typeof RTCPeerConnection !== 'undefined') { webrtc = new RTCPeerConnection(webrtcconfiguration); }
else if (typeof webkitRTCPeerConnection !== 'undefined') { webrtc = new webkitRTCPeerConnection(webrtcconfiguration); }
if (webrtc == null) return;
webrtc.onicecandidate = function (e) { try { if (e.candidate != null) { sendws({ action: 'webRtcIce', ice: e.candidate }); } } catch (ex) { } }
webrtc.oniceconnectionstatechange = function () { if (webrtc & & webrtc.iceConnectionState == 'failed') { closeWebRTC(); } }
webrtc.ondatachannel = function (ev) {
webchannel = ev.channel;
webchannel.onmessage = function (event) { processMessage(event.data, 2); };
webchannel.onopen = function () { webchannel.ok = true; sendws({ action: 'rtcSwitch', v: 0 }); };
webchannel.onclose = function (event) { if (webchannel & & webchannel.ok) { disconnect(); } else { closeWebRTC(); } }
}
}
// Initiate the WebRTC offer or handle the offer from the peer.
if (description == null) {
webchannel = webrtc.createDataChannel("DataChannel", {}); // { ordered: false, maxRetransmits: 2 }
webchannel.onmessage = function (event) { processMessage(event.data, 2); };
webchannel.onopen = function () { webchannel.ok = true; sendws({ action: 'rtcSwitch', v: 0 }); };
webchannel.onclose = function (event) { if (webchannel & & webchannel.ok) { disconnect(); } else { closeWebRTC(); } }
webrtc.createOffer(function (offer) {
webrtc.setLocalDescription(offer, function () { try { sendws({ action: 'webRtcSdp', sdp: offer }); } catch (ex) { } }, closeWebRTC);
}, closeWebRTC, { mandatory: { OfferToReceiveAudio: false, OfferToReceiveVideo: false } });
} else {
webrtc.setRemoteDescription(new RTCSessionDescription(description), function () {
if (description.type == 'offer') {
webrtc.createAnswer(function (answer) {
webrtc.setLocalDescription(answer, function () { try { sendws({ action: 'webRtcSdp', sdp: answer }); } catch (ex) { } }, closeWebRTC);
}, closeWebRTC);
}
}, closeWebRTC);
}
}
// Indicate to peer that data traffic will no longer be sent over websocket and start holding traffic.
function performWebRtcSwitch() {
if (webchannel & & webchannel.ok) { sendws({ action: 'rtcSwitch', v: 1 }); webchannel.xoutBuffer = []; }
}
// Close the WebRTC connection, should be called if a problem occurs during WebRTC setup.
function closeWebRTC() {
if (webchannel != null) { try { webchannel.close(); } catch (e) { } webchannel = null; }
if (webrtc != null) { try { webrtc.close(); } catch (e) { } webrtc = null; }
}
// Disconnect everything
function disconnect() {
enableControls(false);
closeWebRTC();
if (socket != null) { socket.close(); socket = null; }
if (state > 0) { displayControl('Connection closed.'); }
if (state > 1) { setTimeout(start, 500); }
state = 0;
}
// Send data over the current transport (WebRTC first)
function send(data) {
if (state != 2) return; // If not in connected state, ignore this.
if (typeof data == 'object') { data = JSON.stringify(data); } // If this is an object, convert it to a string.
if (webchannel & & webchannel.ok) { if (webchannel.xoutBuffer != null) { webchannel.xoutBuffer.push(data); } else { webchannel.send(data); } } // If WebRTC channel is possible, use it or hold until we can use it.
else { if (socket != null) { socket.send(data); } } // If a websocket channel is present, use that.
}
// Send data over the websocket transport (WebSocket only)
function sendws(data) {
if (state != 2) return;
if (typeof data == 'object') { data = JSON.stringify(data); }
if (socket != null) { socket.send(data); }
}
// Process incoming messages
function processMessage(data, transport) {
if (typeof data == 'string') {
try { data = JSON.parse(data); } catch (ex) { console.log('Unable to parse', data); return; }
switch (data.action) {
case 'chat': { displayRemote(data.msg); break; } // Incoming chat message.
case 'random': { if (random > data.random) { startWebRTC(); } break; } // If we have a larger random value, we start WebRTC.
case 'webRtcSdp': { startWebRTC(data.sdp); break; } // Remote WebRTC offer or answer.
case 'webRtcIce': { if (webrtc) { webrtc.addIceCandidate(new RTCIceCandidate(data.ice)); } break; } // Remote ICE candidate
case 'rtcSwitch': { // WebRTC switch over commands.
switch (data.v) {
case 0: { performWebRtcSwitch(); break; } // Other side is ready for switch over to WebRTC
case 1: { sendws({ action: 'rtcSwitch', v: 2 }); break; } // Other side no longer sending data on websocket, confirm we got the end marker
case 2: { for (var i in webchannel.xoutBuffer) { webchannel.send(webchannel.xoutBuffer[i]); } delete webchannel.xoutBuffer; break; } // Send any pending data over WebRTC and start using WebRTC with all traffic
}
break;
}
default: { console.log('Unhandled object data', data); break; }
}
} else {
console.log('Unhandled data', typeof data, data);
}
}
// This is the main start
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function start() {
// Get started
enableControls(false);
if ((typeof args.id == 'string') & & (args.id.length > 0)) {
socket = new WebSocket(window.location.protocol.replace("http", "ws") + "//" + window.location.host + window.location.pathname.substring(0, window.location.pathname.lastIndexOf('/')) + '/meshrelay.ashx?id=' + args.id);
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socket.onopen = function () { state = 1; displayControl('Waiting for other user...'); }
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socket.onerror = function (e) { console.error(e); }
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socket.onclose = function () { disconnect(); }
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socket.onmessage = function (msg) {
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if ((state < 2 ) & & ( typeof msg . data = = ' string ' ) ) {
enableControls(true);
closeWebRTC();
displayControl('Connected.');
state = 2;
sendws({ action: 'random', random: random }); // Send a random number. Higher number starts the WebRTC session.
return;
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}
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if (state == 2) { processMessage(msg.data, 1); }
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}
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} else {
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displayControl('Error: No connection key specified.');
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}
}
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start();
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< / script >
< / body >
< / html >
