jure/overload-webrtc3.js Secret

## gistfile1.txt
<!DOCTYPE html>
<html>
  <head>
    <script type="text/javascript" src="./overload-webrtc3.js"></script>
  </head>
  <body>
  </body>
</html>

## overload-webrtc3.js
(function() {
  var RTCSessionDescription = window.RTCSessionDescription || window.mozRTCSessionDescription;
  var RTCPeerConnection = window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection;
  var RTCIceCandidate = window.RTCIceCandidate || window.mozRTCIceCandidate;

  var Client = function(config, signalingChannel) {
    var self = this;

    this.id = Math.random().toString(32);
    this.remoteId = null;
    this._pc = new RTCPeerConnection(config);
    this._channel = null;
    this._signalingChannel = signalingChannel;
    this._requests = {};

    this._pc.onicecandidate = function(evt) {
      if (evt.candidate)
        self._signalingChannel.send(self.id, self.remoteId, JSON.stringify({ "candidate": evt.candidate }));
    };

    this._pc.onnegotiationneeded = function() {
      self._pc.createOffer(function(desc) {
        self.localDescCreated(desc);
      }, function(error) {
        console.error("Failed to create offer:", error);
      });
    };
  };

  Client.prototype = {
    connect: function(remoteId) {
      this.remoteId = remoteId;
      this._channel = this._pc.createDataChannel(Math.random().toString(32));
      this.setupChannel();
    },

    localDescCreated: function(desc) {
      var self = this;

      this._pc.setLocalDescription(desc, function() {
        self._signalingChannel.send(self.id, self.remoteId, JSON.stringify({ "sdp": self._pc.localDescription }));
      }, function(error) {
        console.error("Failed to set local description:", error);
      });
    },

    onsignalingmessage: function(remoteId, json) {
      var self = this;

      if (!this.remoteId) {
        this.remoteId = remoteId;
        this._pc.ondatachannel = function(evt) {
          self._channel = evt.channel;
          self.setupChannel();
        };
      }

      var message = JSON.parse(json);
      if (message.sdp) {
        this._pc.setRemoteDescription(new RTCSessionDescription(message.sdp), function() {
          if (self._pc.remoteDescription.type == "offer") {
            self._pc.createAnswer(function(desc) {
              self.localDescCreated(desc);
            }, function(error) {
              console.error("Failed to create answer:", error);
            });
          }
        }, function(error) {
          console.error("Failed to set remote description:", error);
        });
      } else {
        this._pc.addIceCandidate(new RTCIceCandidate(message.candidate),
                                 function() {}, function(error) {
                                   console.error("Failed to add ice candidate:", error);
                                 });
      }
    },

    setupChannel: function() {
      var self = this;
      var count = 0;

      this._channel.onopen = function() {
        self.sendRequest({type: 'ping'});
      };

      this._channel.onmessage = function(evt) {
        self.sendRequest({type: 'pong'});
        count = count + 1;
        if(count === 5) {
          console.log('Disconnecting client', self.id);
          self.destroy();
        }
      };
    },

    sendRequest: function(request) {
      var self = this;

      this._channel.send(JSON.stringify(request));
    },

    destroy: function () {
      var self = this;
      self._pc.close();
      self._pc = null;
      delete clients[self.id];

    }
  };


  var clients = {};

  var signalingChannel = {
    send: function(from, to, message) {
      clients[to].onsignalingmessage(from, message);
    }
  };


  setInterval(function() {

    var client1 = new Client({'iceServers': [{ 'url': 'stun:stun.l.google.com:19302' }]},
                            signalingChannel);
    clients[client1.id] = client1;
    var client2 = new Client({'iceServers': [{ 'url': 'stun:stun.l.google.com:19302' }]},
                        signalingChannel);
    client1.connect(client2.id);
    console.log('Connecting client 1 and 2.');
    clients[client2.id] = client2;
  }, 200);

  window.clients = clients;
})();
	<!DOCTYPE html>
	<html>
	<head>
	<script type="text/javascript" src="./overload-webrtc3.js"></script>
	</head>
	<body>
	</body>
	</html>
	(function() {
	var RTCSessionDescription = window.RTCSessionDescription \|\| window.mozRTCSessionDescription;
	var RTCPeerConnection = window.RTCPeerConnection \|\| window.mozRTCPeerConnection \|\| window.webkitRTCPeerConnection;
	var RTCIceCandidate = window.RTCIceCandidate \|\| window.mozRTCIceCandidate;

	var Client = function(config, signalingChannel) {
	var self = this;

	this.id = Math.random().toString(32);
	this.remoteId = null;
	this._pc = new RTCPeerConnection(config);
	this._channel = null;
	this._signalingChannel = signalingChannel;
	this._requests = {};

	this._pc.onicecandidate = function(evt) {
	if (evt.candidate)
	self._signalingChannel.send(self.id, self.remoteId, JSON.stringify({ "candidate": evt.candidate }));
	};

	this._pc.onnegotiationneeded = function() {
	self._pc.createOffer(function(desc) {
	self.localDescCreated(desc);
	}, function(error) {
	console.error("Failed to create offer:", error);
	});
	};
	};

	Client.prototype = {
	connect: function(remoteId) {
	this.remoteId = remoteId;
	this._channel = this._pc.createDataChannel(Math.random().toString(32));
	this.setupChannel();
	},

	localDescCreated: function(desc) {
	var self = this;

	this._pc.setLocalDescription(desc, function() {
	self._signalingChannel.send(self.id, self.remoteId, JSON.stringify({ "sdp": self._pc.localDescription }));
	}, function(error) {
	console.error("Failed to set local description:", error);
	});
	},

	onsignalingmessage: function(remoteId, json) {
	var self = this;

	if (!this.remoteId) {
	this.remoteId = remoteId;
	this._pc.ondatachannel = function(evt) {
	self._channel = evt.channel;
	self.setupChannel();
	};
	}

	var message = JSON.parse(json);
	if (message.sdp) {
	this._pc.setRemoteDescription(new RTCSessionDescription(message.sdp), function() {
	if (self._pc.remoteDescription.type == "offer") {
	self._pc.createAnswer(function(desc) {
	self.localDescCreated(desc);
	}, function(error) {
	console.error("Failed to create answer:", error);
	});
	}
	}, function(error) {
	console.error("Failed to set remote description:", error);
	});
	} else {
	this._pc.addIceCandidate(new RTCIceCandidate(message.candidate),
	function() {}, function(error) {
	console.error("Failed to add ice candidate:", error);
	});
	}
	},

	setupChannel: function() {
	var self = this;
	var count = 0;

	this._channel.onopen = function() {
	self.sendRequest({type: 'ping'});
	};

	this._channel.onmessage = function(evt) {
	self.sendRequest({type: 'pong'});
	count = count + 1;
	if(count === 5) {
	console.log('Disconnecting client', self.id);
	self.destroy();
	}
	};
	},

	sendRequest: function(request) {
	var self = this;

	this._channel.send(JSON.stringify(request));
	},

	destroy: function () {
	var self = this;
	self._pc.close();
	self._pc = null;
	delete clients[self.id];

	}
	};


	var clients = {};

	var signalingChannel = {
	send: function(from, to, message) {
	clients[to].onsignalingmessage(from, message);
	}
	};


	setInterval(function() {

	var client1 = new Client({'iceServers': [{ 'url': 'stun:stun.l.google.com:19302' }]},
	signalingChannel);
	clients[client1.id] = client1;
	var client2 = new Client({'iceServers': [{ 'url': 'stun:stun.l.google.com:19302' }]},
	signalingChannel);
	client1.connect(client2.id);
	console.log('Connecting client 1 and 2.');
	clients[client2.id] = client2;
	}, 200);

	window.clients = clients;
	})();