Signaling.md

Realtime/Working WebRTC Experiments & Signaling

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Signaling for RTCMultiConnection-v1.4 and earlier releases

var SIGNALING_SERVER = 'http://domain.com:8888/';
connection.openSignalingChannel = function(config) {   
   var channel = config.channel || this.channel || 'one-to-one-video-chat';
   var sender = Math.round(Math.random() * 60535) + 5000;
   
   io.connect(SIGNALING_SERVER).emit('new-channel', {
      channel: channel,
      sender : sender
   });
   
   var socket = io.connect(SIGNALING_SERVER + channel);
   socket.channel = channel;
   
   socket.on('connect', function () {
      if (config.callback) config.callback(socket);
   });
   
   socket.send = function (message) {
        socket.emit('message', {
            sender: sender,
            data  : message
        });
    };
   
   socket.on('message', config.onmessage);
};

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Signaling for all latest experiments and newer releases.

Your server-side node.js code looks like this:

io.sockets.on('connection', function (socket) {
    socket.on('message', function (data) {
        socket.broadcast.emit('message', data);
    });
});

And to override openSignalingChannel on the client side:

connection.openSignalingChannel = function(callback) {
    return io.connect().on('message', callback);
};

Want to use XHR, WebSockets, SIP, XMPP, etc. for signaling? Read this post.

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Want to use Firebase for signaling?

var config = {
    openSocket: function (config) {
        var channel = config.channel || location.href.replace(/\/|:|#|%|\.|\[|\]/g, '');
        var socket = new Firebase('https://chat.firebaseIO.com/' + channel);
        socket.channel = channel;
        socket.on('child_added', function (data) {
            config.onmessage(data.val());
        });
        socket.send = function (data) {
            this.push(data);
        }
        config.onopen && setTimeout(config.onopen, 1);
        socket.onDisconnect().remove();
        return socket;
    }
}

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Want to use PubNub for signaling?

var config = {
    openSocket: function (config) {
        var channel = config.channel || location.href.replace(/\/|:|#|%|\.|\[|\]/g, '');
        var socket = io.connect('https://pubsub.pubnub.com/' + channel, {
            publish_key: 'demo',
            subscribe_key: 'demo',
            channel: config.channel || channel,
            ssl: true
        });
        if (config.onopen) socket.on('connect', config.onopen);
        socket.on('message', config.onmessage);
        return socket;
    }
}

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Signaling Concepts

Interested to understand WebRTC Signaling Concepts? Read this document.

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License

WebRTC Experiments are released under MIT licence . Copyright (c) 2013 Muaz Khan.