├── test
    ├── .gitignore
    ├── node_modules
    │   └── .gitignore
    ├── package.json
    ├── style.css
    ├── index.html
    ├── server.js
    ├── client.js
    └── datachannel.js
├── dotcloud.yml
├── supervisord.conf
├── .dotcloud
    └── config
├── .gitignore
├── .project
├── package.json
├── certs
    ├── certrequest.csr
    ├── certificate.pem
    └── privatekey.pem
├── deploy.sh
├── lib
    ├── EventTarget.js
    └── reliable.min.js
├── README.md
├── websockserver.go
├── src
    ├── datachannel-alfred.js
    └── datachannel.js
├── server.js
├── bin
    └── build.js
└── dist
    ├── datachannel.min.js
    └── datachannel.js


/test/.gitignore:
--------------------------------------------------------------------------------
1 | /node_modules
2 | 


--------------------------------------------------------------------------------
/test/node_modules/.gitignore:
--------------------------------------------------------------------------------
1 | /express
2 | 


--------------------------------------------------------------------------------
/dotcloud.yml:
--------------------------------------------------------------------------------
1 | www:
2 |   type: nodejs
3 |   config:
4 |     node_version: v0.6.x
5 | 


--------------------------------------------------------------------------------
/test/package.json:
--------------------------------------------------------------------------------
1 | {
2 |   "dependencies":
3 |   {
4 |     "express": "2.5.1"
5 |   }
6 | }


--------------------------------------------------------------------------------
/supervisord.conf:
--------------------------------------------------------------------------------
1 | [program:node]
2 | command = node server.js
3 | directory = /home/dotcloud/current


--------------------------------------------------------------------------------
/.dotcloud/config:
--------------------------------------------------------------------------------
1 | {
2 |     "push_branch": null, 
3 |     "application": "datachannel", 
4 |     "version": "0.9.1", 
5 |     "push_protocol": "rsync"
6 | }


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
 1 | lib-cov
 2 | *.seed
 3 | *.log
 4 | *.csv
 5 | *.dat
 6 | *.out
 7 | *.pid
 8 | *.gz
 9 | 
10 | pids
11 | logs
12 | results
13 | 
14 | npm-debug.log
15 | /node_modules
16 | /test native
17 | 


--------------------------------------------------------------------------------
/.project:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <projectDescription>
 3 | 	<name>DataChannel-polyfill</name>
 4 | 	<comment></comment>
 5 | 	<projects>
 6 | 		<project>EventTarget.js</project>
 7 | 		<project>reliable</project>
 8 | 	</projects>
 9 | 	<buildSpec>
10 | 	</buildSpec>
11 | 	<natures>
12 | 		<nature>org.nodeclipse.ui.NodeNature</nature>
13 | 	</natures>
14 | </projectDescription>
15 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "DataChannel-polyfill",
 3 |   "version": "1.0.0-3",
 4 |   "description": "WebRTC DataChannels polyfill using WebSockets",
 5 |   "devDependencies": {
 6 |     "uglify-js": "~1.3.4"
 7 |   },
 8 |   "dependencies": {
 9 |     "ws": "0.4.x"
10 |   },
11 |   "subdomain": "DataChannel-polyfill",
12 |   "scripts": {
13 |     "start": "server.js"
14 |   },
15 |   "engines": {
16 |     "node": "0.8.x"
17 |   }
18 | }


--------------------------------------------------------------------------------
/test/style.css:
--------------------------------------------------------------------------------
 1 | html, body {
 2 |   height: 100%;
 3 | }
 4 | 
 5 | html {
 6 |   overflow-y: scroll;
 7 | }
 8 | 
 9 | body {
10 |   padding: 0;
11 |   margin: 0;
12 | }
13 | 
14 | #chatbox {
15 |   height: 100%;
16 |   right: 20px;
17 |   left: 20px;
18 |   bottom: 0px;
19 | }
20 | 
21 | #chatinput {
22 |   width: 100%;
23 |   height: 5%;
24 |   padding-top: 7px;
25 |   padding-bottom: 7px;
26 |   border-radius: 8px;
27 |   border-style:solid;
28 |   border-width:1px;
29 | }
30 | 
31 | #messages {
32 |   overflow: scroll;
33 |   height: 90%;
34 |   width: 100%;
35 |   background-color: white;
36 |   border-radius: 8px;
37 |   border-style:solid;
38 |   border-width:1px;
39 | }
40 | 


--------------------------------------------------------------------------------
/certs/certrequest.csr:
--------------------------------------------------------------------------------
 1 | -----BEGIN CERTIFICATE REQUEST-----
 2 | MIIBmTCCAQICAQAwWTELMAkGA1UEBhMCQVUxEzARBgNVBAgMClNvbWUtU3RhdGUx
 3 | ITAfBgNVBAoMGEludGVybmV0IFdpZGdpdHMgUHR5IEx0ZDESMBAGA1UEAwwJbG9j
 4 | YWxob3N0MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCwaCx+QLRkmsucOGCu
 5 | QpIgpB0PCClfMvbVHZhj2tr2r7qRmNFW3KgHc/jM5DPcLHk5DsHWTEemFAoX5qw2
 6 | KQX6CDafXgrHSkzjvVVYAqsYNAI/l46ZujT3LUmyrFJ6NRZ49dzK28EaqnQi4iP4
 7 | yErhnwyaAjNTQh2lDN2InfiEdQIDAQABoAAwDQYJKoZIhvcNAQEFBQADgYEAKZ2J
 8 | UWkutG0KPO0ZI79iCO0lNbAHb6lMdf4BTUHSITImk7P9T247SDsiGsCcIcEJh/n3
 9 | k7yM6p3WZZ9lmENcP1gypD5etlIBDpK4lFDGH9P0dmMnjIiTSqVVz+c6+Z/E2RxB
10 | th4o+26usWW+HMQ/rj6SbTtfUZHJnUqFH4DvwDI=
11 | -----END CERTIFICATE REQUEST-----
12 | 


--------------------------------------------------------------------------------
/deploy.sh:
--------------------------------------------------------------------------------
 1 | #!/usr/bin/env sh
 2 | 
 3 | # Simple script to deploy ShareIt! automatically to the different static web
 4 | # hostings and have all of them updated.
 5 | #
 6 | # It will be of none interest for you since it's only purposed for internal use
 7 | 
 8 | 
 9 | echo
10 | echo "* Push code to GitHub master branch *"
11 | git checkout master
12 | git pull
13 | git push origin master
14 | 
15 | echo
16 | echo "* Deploy in GitHub *"
17 | git checkout gh-pages
18 | git rebase master
19 | git push origin gh-pages
20 | git checkout master  # Going back to master branch
21 | 
22 | echo
23 | echo "* Deploy on Nodejitsu *"
24 | jitsu deploy
25 | 
26 | echo
27 | echo "* Deploy on dotCloud *"
28 | dotcloud push


--------------------------------------------------------------------------------
/certs/certificate.pem:
--------------------------------------------------------------------------------
 1 | -----BEGIN CERTIFICATE-----
 2 | MIICKTCCAZICCQDoturXAxl08jANBgkqhkiG9w0BAQUFADBZMQswCQYDVQQGEwJB
 3 | VTETMBEGA1UECAwKU29tZS1TdGF0ZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0
 4 | cyBQdHkgTHRkMRIwEAYDVQQDDAlsb2NhbGhvc3QwHhcNMTIwODE2MDkyMDE3WhcN
 5 | MTIwOTE1MDkyMDE3WjBZMQswCQYDVQQGEwJBVTETMBEGA1UECAwKU29tZS1TdGF0
 6 | ZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0cyBQdHkgTHRkMRIwEAYDVQQDDAls
 7 | b2NhbGhvc3QwgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBALBoLH5AtGSay5w4
 8 | YK5CkiCkHQ8IKV8y9tUdmGPa2vavupGY0VbcqAdz+MzkM9wseTkOwdZMR6YUChfm
 9 | rDYpBfoINp9eCsdKTOO9VVgCqxg0Aj+Xjpm6NPctSbKsUno1Fnj13MrbwRqqdCLi
10 | I/jISuGfDJoCM1NCHaUM3Yid+IR1AgMBAAEwDQYJKoZIhvcNAQEFBQADgYEADpEa
11 | NdHGT6IirX8seuUDRaEKfR1fqmZpKxgfjCCfnWrm6nZin+g8+KJtn5NJcOMk15ob
12 | wrnxQFIJYVsI72Nq2woxeGOkyy7Gyo3h/bfV0mGbz+ueSuyqhgCP/Yl6OFYJILk2
13 | Nf8KaA3U58iniSBlZHa/QwwHXY0UVBoLI+9YGq8=
14 | -----END CERTIFICATE-----
15 | 


--------------------------------------------------------------------------------
/test/index.html:
--------------------------------------------------------------------------------
 1 | <html>
 2 |   <head>
 3 |     <title>Test DataChannel-polyfill</title>
 4 |     <link type="text/css" href="style.css" rel="stylesheet"></link>
 5 | 
 6 |     <script src="datachannel.js"></script>
 7 | <!--<script>DCPF_install("ws://localhost:8002")</script>-->
 8 |     <script>DCPF_install("wss://datachannel-polyfill.nodejitsu.com")</script>
 9 | <!--<script>DCPF_install("wss://datachannel-piranna.dotcloud.com")</script>-->
10 | 
11 |     <script src="client.js"></script>
12 |   </head>
13 |   <body>
14 |     <div id="chatbox">
15 |       <div id="messages"></div>
16 |       <br>
17 |       <input id="chatinput" type="text"/>
18 |     </div>
19 | 
20 |     <a href="https://github.com/piranna/DataChannel-polyfill">
21 |       <img style="position: absolute; top: 0; right: 0; border: 0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_orange_ff7600.png" alt="Fork me on GitHub">
22 |     </a>
23 |   </body>
24 | </html>


--------------------------------------------------------------------------------
/certs/privatekey.pem:
--------------------------------------------------------------------------------
 1 | -----BEGIN RSA PRIVATE KEY-----
 2 | MIICXAIBAAKBgQCwaCx+QLRkmsucOGCuQpIgpB0PCClfMvbVHZhj2tr2r7qRmNFW
 3 | 3KgHc/jM5DPcLHk5DsHWTEemFAoX5qw2KQX6CDafXgrHSkzjvVVYAqsYNAI/l46Z
 4 | ujT3LUmyrFJ6NRZ49dzK28EaqnQi4iP4yErhnwyaAjNTQh2lDN2InfiEdQIDAQAB
 5 | AoGAPZgyKOco1ZPjEinxQAdIhJMo/k2oPHBMFT+fLQaGu+nB6AKG3aBwHyIUNl5b
 6 | 6T2yGgUYE15RCiEnIQ9PBB4w0ncrYYasVLrF6FEOoNoRu6Kn1eZJhhCu/ZUNQ40M
 7 | t8chpEqa95oqd505IuvXjGPtNDx+QO8LXx8w8haYCxDsW6UCQQDeZj0DOjOHmMG8
 8 | 7k4Z0k1vFFNjz+VsHtpi+IAS0G6Zkb/79vgKWZk+RNrUQmfpZ3SCi22fjou88MSN
 9 | hMLqiENTAkEAyw8U3AH/lUDm9IWrsXDJYK99tuxJ7vWzIvTLbStmuufK/wej+Z8+
10 | TU93QP2nm/WDqx2Iu8fweIWLcfn2nMSoFwJBAKoqripnAQCSiEKoUEf/mtIQSlIH
11 | w3I8FTs/CrfalZWZaL1A1b8NmWyEwK9CdEGpsAMm7eT068TQsIPb/kv3oRMCQE2k
12 | d6JkNTj5txW6YtsXODj7AUPHd8GiOxvbpEka9k3zQYBgiIdzJ1xiTUQReVw99Vmh
13 | kl3S5pT+40HyhSSOYYMCQGt38273Hwkd4Lod9z9lQzQHafvEvL1P3+vOg16Dxz6e
14 | TtAvpyrbLHvTgRM2JtfhicngfWJ2b2bgjpc28E4+nZ4=
15 | -----END RSA PRIVATE KEY-----
16 | 


--------------------------------------------------------------------------------
/lib/EventTarget.js:
--------------------------------------------------------------------------------
 1 | /**
 2 |  * @author mrdoob / http://mrdoob.com/
 3 |  * @author Jesús Leganés Combarro "Piranna" <piranna@gmail.com>
 4 |  */
 5 | 
 6 | var EventTarget = function()
 7 | {
 8 | 	var listeners = {};
 9 | 
10 | 	this.addEventListener = function(type, listener)
11 | 	{
12 | 		if(listeners[type] === undefined)
13 | 			listeners[type] = [];
14 | 
15 | 		if(listeners[type].indexOf(listener) === -1)
16 | 			listeners[type].push(listener);
17 | 	};
18 | 
19 | 	this.dispatchEvent = function(event)
20 | 	{
21 | 		var listenerArray = (listeners[event.type] || []);
22 | 
23 | 		var dummyListener = this['on' + event.type];
24 | 		if(typeof dummyListener == 'function')
25 | 			listenerArray = listenerArray.concat(dummyListener);
26 | 
27 | 		for(var i=0, l=listenerArray.length; i<l; i++)
28 | 			listenerArray[i].call(this, event);
29 | 	};
30 | 
31 | 	this.removeEventListener = function(type, listener)
32 | 	{
33 | 		var index = listeners[type].indexOf(listener);
34 | 
35 | 		if(index !== -1)
36 | 			listeners[type].splice(index, 1);
37 | 	};
38 | };
39 | 
40 | exports.EventTarget = EventTarget;


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | DataChannel-polyfill
 2 | ====================
 3 | 
 4 | Web browser polyfill that implement the WebRTC DataChannel API over a websocket.
 5 | It implement the full latest DataChannel API specification defined at 2013-01-16.
 6 | 
 7 | Credits
 8 | -------
 9 | Jesús Leganés Combarro "Piranna" <piranna@gmail.com>
10 | 
11 | This code can be found at https://github.com/piranna/DataChannel-polyfill
12 | 
13 | How to use it
14 | -------------
15 | The polyfill is splitted in two parts, the polyfill 'per se' at datachannel.js
16 | and the server backend at server-datachannel.js (it needs Node.js, obviusly). To
17 | use it it's a matter of three steps:
18 | 
19 | 1. include the datachannel.js file on a script tag on the head section of yout
20 |    HTML code and call to DCPF_install() function giving the backend server URL
21 |    as parameter
22 | 
23 | 2. run the backend server
24 | 
25 | 3. there's no third step! :-)
26 | 
27 | There's also two (public) SSL enabled backend servers that you can use at
28 | wss://datachannel-polyfill.nodejitsu.com and wss://datachannel-piranna.dotcloud.com.
29 | Just for testing purposes please, the bandwidth is high, but not infinite... :-)
30 | 
31 | How to test it
32 | --------------
33 | On the 'test' folder you can find a little P2P chat that can be used for testing
34 | or just learn how to use the DataChannel API. To run it
35 | 
36 | 1. add a copy of datachannel.js file on the 'test' folder (a symbolic link is
37 |    enought)
38 | 
39 | 2. run the test server
40 | 
41 | 3. run the backend server (by default is using the one at Nodejitsu)
42 | 
43 | 4. open several browsers pointing to http://localhost:8000 to start chatting :-)
44 | 
45 | Don't worry about the dotcloud.yml and supervisord.conf files, they are specific
46 | for the dotCloud backend server.
47 | 
48 | Requeriments
49 | ------------
50 | * a web browser with the PeerConnection object (currently Chrome/Chromium >= 19)
51 | 
52 | * a Node.js server with the 'ws' module installed for the backend server
53 | 
54 | Future work
55 | -----------
56 | * Use native implementations if both ends support them (currently it requires at
57 |   least one of the ends doesn't support native DataChannels so it can use the
58 |   polyfill).
59 | 
60 | * Detect and allow the coexistence of native and polyfill implementations on the
61 |   same network (use polyfill if one of the two ends doesn't support native
62 |   DataChannels)
63 | 


--------------------------------------------------------------------------------
/websockserver.go:
--------------------------------------------------------------------------------
  1 | package main
  2 | 
  3 | import (
  4 | 	"fmt"
  5 | 	"net/http"
  6 | 	"code.google.com/p/go.net/websocket"
  7 | 	"strings"
  8 | )
  9 | 
 10 | // ===================
 11 | // C O N N E C T I O N
 12 | // ===================
 13 | 
 14 | type connection struct {
 15 | 	// The websocket connection.
 16 | 	ws *websocket.Conn
 17 | 
 18 | 	id string
 19 | 
 20 | 	peer *connection
 21 | 
 22 | 	// Buffered channel of outbound messages.
 23 | 	send chan string
 24 | }
 25 | 
 26 | var connections map[string]*connection = make(map[string]*connection)
 27 | 
 28 | func (c *connection) reader() {
 29 | 	for {
 30 | 
 31 | 		fmt.Println(len(connections))
 32 | 
 33 | 		var message string
 34 | 		err := websocket.Message.Receive(c.ws, &message)
 35 | 		if err != nil {
 36 | 			fmt.Println(err)
 37 | 			break
 38 | 		}
 39 | 
 40 | 		fmt.Println("R: " + c.id + " : " + message)
 41 | 
 42 | 		if len(message) > 7 && message[0:8] == "connect:" {
 43 | 			 {
 44 | 				connectParts := strings.Split(message, ":")
 45 | 				if len(connectParts) == 3 {
 46 | 					c.id = connectParts[1]
 47 | 					connections[c.id] = c
 48 | 
 49 | 					if _,ok := connections[connectParts[2]]; ok {
 50 | 						c.peer = connections[connectParts[2]]
 51 | 						connections[connectParts[2]].peer = c
 52 | 					}
 53 | 				}
 54 | 			}
 55 | 		} else if (c.peer != nil) {
 56 | 
 57 | 			c.peer.send <- message
 58 | 
 59 | 		}
 60 | 
 61 | 	}
 62 | 	c.send <- "disconnect" // Send disconnect to my own writer.
 63 | 	delete(connections, c.id) // Remove myself from connection map.
 64 | 	fmt.Println("R: Connection lost:" + c.id)
 65 | 	c.ws.Close()
 66 | }
 67 | 
 68 | func (c *connection) writer() {
 69 | 	for {
 70 | 		message := <- c.send
 71 | 		if message == "disconnect" {
 72 | 			break;
 73 | 		}
 74 | 		fmt.Println("W: " + c.id + " : " + message)
 75 | 		err := websocket.Message.Send(c.ws, message)
 76 | 		if err != nil {
 77 | 			break
 78 | 		}
 79 | 	}
 80 | 	fmt.Println("W: Connection lost:" + c.id)
 81 | 	c.ws.Close()
 82 | }
 83 | 
 84 | // =======
 85 | // M A I N
 86 | // =======
 87 | 
 88 | func wsHandler(ws *websocket.Conn) {
 89 | 	fmt.Println("NEW WEBSOCKET!");
 90 | 	fmt.Println(ws.Config())
 91 | 	fmt.Println(ws.RemoteAddr())
 92 | 	c := &connection{send: make(chan string, 256), ws: ws}
 93 | 	go c.writer()
 94 | 	c.reader()
 95 | }
 96 | 
 97 | func main() {
 98 | 	http.Handle("/", websocket.Handler(wsHandler));
 99 | 	http.ListenAndServe(":8000", nil)
100 | }
101 | 


--------------------------------------------------------------------------------
/test/server.js:
--------------------------------------------------------------------------------
  1 | var app = require('express').createServer();
  2 |     app.listen(8000);
  3 | 
  4 | 
  5 | app.get('/', function(req, res) {
  6 |   res.sendfile(__dirname + '/index.html');
  7 | });
  8 | 
  9 | app.get('/style.css', function(req, res) {
 10 |   res.sendfile(__dirname + '/style.css');
 11 | });
 12 | 
 13 | app.get('/reliable.min.js', function(req, res) {
 14 |   res.sendfile(__dirname + '/reliable.min.js');
 15 | });
 16 | 
 17 | app.get('/datachannel.js', function(req, res) {
 18 |   res.sendfile(__dirname + '/datachannel.js');
 19 | });
 20 | 
 21 | app.get('/client.js', function(req, res) {
 22 |   res.sendfile(__dirname + '/client.js');
 23 | });
 24 | 
 25 | 
 26 | var WebSocketServer = require('ws').Server
 27 | var wss = new WebSocketServer({server: app});
 28 | 
 29 | 
 30 | //Array to store connections
 31 | var sockets = [];
 32 | sockets.find = function(id)
 33 | {
 34 |   for(var i = 0; i < sockets.length; i++)
 35 |   {
 36 |     var socket = sockets[i];
 37 |     if(id === socket.id)
 38 |       return socket;
 39 |   }
 40 | }
 41 | 
 42 | 
 43 | wss.on('connection', function(socket)
 44 | {
 45 |   socket.onmessage = function(message)
 46 |   {
 47 |     var args = JSON.parse(message.data);
 48 | 
 49 |     var eventName = args[0]
 50 |     var socketId  = args[1]
 51 | 
 52 |     var soc = sockets.find(socketId);
 53 |     if(soc)
 54 |     {
 55 |       console.log(eventName);
 56 | 
 57 |       args[1] = socket.id
 58 | 
 59 |       soc.send(JSON.stringify(args), function(error)
 60 |       {
 61 |         if(error)
 62 |           console.log(error);
 63 |       });
 64 |     }
 65 |   }
 66 | 
 67 |   socket.onclose = function()
 68 |   {
 69 |     console.log('close');
 70 | 
 71 |     // remove socket and send peer.remove to all other sockets
 72 |     sockets.splice(sockets.indexOf(socket), 1);
 73 | 
 74 |     for(var i = 0; i < sockets.length; i++)
 75 |     {
 76 |       var soc = sockets[i];
 77 | 
 78 |       console.log(soc.id);
 79 | 
 80 |       soc.send(JSON.stringify(["peer.remove", socket.id]),
 81 |       function(error)
 82 |       {
 83 |         if(error)
 84 |           console.log(error);
 85 |       });
 86 |     }
 87 |   }
 88 | 
 89 |   // generate a 4 digit hex code randomly
 90 |   function S4()
 91 |   {
 92 |     return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1);
 93 |   }
 94 | 
 95 |   // make a REALLY COMPLICATED AND RANDOM id, kudos to dennis
 96 |   function id()
 97 |   {
 98 |     return S4()+S4() +"-"+ S4() +"-"+ S4() +"-"+ S4() +"-"+ S4()+S4()+S4();
 99 |   }
100 | 
101 |   socket.id = id();
102 |   console.log('new socket got id: ' + socket.id);
103 | 
104 |   // Notify that there's a new peer connected and build a list of peers
105 |   var connectionsId = [];
106 | 
107 |   for(var i = 0; i < sockets.length; i++)
108 |   {
109 |     var soc = sockets[i];
110 | 
111 |     connectionsId.push(soc.id);
112 | 
113 |     // inform the peers that they have a new peer
114 |     soc.send(JSON.stringify(["peer.create", socket.id]),
115 |     function(error)
116 |     {
117 |       if (error)
118 |         console.log(error);
119 |     });
120 |   }
121 | 
122 |   // send new peer a list of all prior peers
123 |   socket.send(JSON.stringify(["peers", connectionsId]),
124 |   function(error)
125 |   {
126 |     if(error)
127 |       console.log(error);
128 |   });
129 | 
130 |   sockets.push(socket);
131 | });


--------------------------------------------------------------------------------
/src/datachannel-alfred.js:
--------------------------------------------------------------------------------
  1 | (function() {
  2 | 
  3 | 	var
  4 | 		// Configuration:
  5 | 		hostname = window.CHANNEL_HOST || window.location.host || 'localhost:8000',
  6 | 		websocketServer = "ws://"+hostname+"/",
  7 | 
  8 | 		// For browser compatibility:
  9 | 		PeerConnection = window.PeerConnection
 10 | 						|| window.RTCPeerConnection
 11 | 						|| window.mozPeerConnection
 12 | 						|| window.webkitRTCPeerConnection
 13 | 						|| window.webkitPeerConnection00;
 14 | 
 15 | 	if (typeof(PeerConnection) === 'undefined') {
 16 | 		console.error('Your browser does not support PeerConnection.');
 17 | 		return;
 18 | 	}
 19 | 
 20 | 	var pc = new PeerConnection(null);
 21 | 
 22 | 	if (typeof(pc.createDataChannel) !== 'undefined') {
 23 | 		try {
 24 | 			// This will throw when data channels is not implemented properly yet
 25 | 			pc.createDataChannel('polyfill')
 26 | 
 27 | 			// If we get this far you already have DataChannel support.
 28 | 			return console.log('REAL DATACHANNELS!');
 29 | 		} catch(e){
 30 | 			// TODO verify the Error
 31 | 		}
 32 | 	}
 33 | 
 34 | 	function DataChannel(peerConnection,label,dataChannelDict) {
 35 | 		this.readyState = "connecting";
 36 | 		this.label = label;
 37 | 		this.reliable = (!dataChannelDict || !dataChannelDict.reliable);
 38 | 		this._peerConnection = peerConnection;
 39 | 		this._queue = [];
 40 | 		this._webSocket = new WebSocket(websocketServer);
 41 | 
 42 | 		this._webSocket.onclose = function() {
 43 | 			this.readyState = "closed";
 44 | 			if (typeof this.onclose == 'function'){
 45 | 				this.onclose()
 46 | 			}
 47 | 		}.bind(this);
 48 | 
 49 | 		this._webSocket.onopen = function() {
 50 | 			this.readyState = "open";
 51 | 			this._identify();
 52 | 
 53 | 			if (typeof this.onopen == 'function'){
 54 | 				this.onopen()
 55 | 			}
 56 | 
 57 | 			if (typeof this._peerConnection.ondatachannel == 'function') {
 58 | 				var evt = document.createEvent('Event')
 59 | 				evt.initEvent('datachannel', true, true)
 60 | 				evt.channel = this;
 61 | 				this._peerConnection.ondatachannel(evt)
 62 | 			}
 63 | 
 64 | 			// empty the queue
 65 | 			while(this._queue.length) {
 66 | 				data = this._queue.shift();
 67 | 				this.send(data);
 68 | 			}
 69 | 		}.bind(this);
 70 | 
 71 | 		this._webSocket.onmessage = function(msg) {
 72 | 			if (typeof this.onmessage == 'function') {
 73 | 				this.onmessage(msg);
 74 | 			}
 75 | 		}.bind(this);
 76 | 
 77 | 		this._webSocket.onerror = function(msg) {
 78 | 			console.error(msg)
 79 | 			if (typeof this.onerror == 'function') {
 80 | 				this.onerror(msg);
 81 | 			}
 82 | 		}.bind(this);
 83 | 	};
 84 | 
 85 | 	DataChannel.prototype._identify = function() {
 86 | 		if (this._peerConnection === null) return false;
 87 | 
 88 | 		if (this._peerConnection._localDescription && this._peerConnection._remoteDescription) {
 89 | 			this._localId = description2id(this._peerConnection._localDescription) + '_' + this.label
 90 | 			this._remoteId = description2id(this._peerConnection._remoteDescription) + '_' + this.label
 91 | 			this.send('connect:' + this._localId + ':' + this._remoteId );
 92 | 		}
 93 | 	};
 94 | 
 95 | 	DataChannel.prototype.close = function() {
 96 | 		this.readyState = "closing";
 97 | 		this._webSocket.close();
 98 | 	};
 99 | 
100 | 	DataChannel.prototype.send = function(data) {
101 | 		if( this.readyState == 'open' ) {
102 | 			this._webSocket.send(data);
103 | 		} else if( this.reliable ) { // queue messages when "reliable"
104 | 			this._queue.push(data);
105 | 		}
106 | 	};
107 | 
108 | 	PeerConnection.prototype.createDataChannel = function(label, dataChannelDict) {
109 | 		console.log('createDataChannel',label,dataChannelDict)
110 | 		var channel = new DataChannel(this,label,dataChannelDict);
111 | 
112 | 		if (typeof(this._allDataChannels) == 'undefined') {
113 | 			this._allDataChannels = [];
114 | 		}
115 | 		this._allDataChannels.push(channel);
116 | 
117 | 		return channel;
118 | 	}
119 | 
120 | 	function description2id(description) {
121 | 		var result = description.sdp.replace(/(\r\n|\n|\r)/gm, '\n')
122 | 		var re = new RegExp("o=.+");
123 | 		result = re.exec(result)
124 | 		return result[0]
125 | 	}
126 | 
127 | // Overwrite PeerConnection's description setters, to get ID:s for the websocket connections.
128 | 
129 | 	var
130 | 		setLocalDescription = PeerConnection.prototype.setLocalDescription,
131 | 		setRemoteDescription = PeerConnection.prototype.setRemoteDescription;
132 | 
133 | 	PeerConnection.prototype.setLocalDescription = function(description, successCallback, errorCallback) {
134 | 		this._localDescription = description;
135 | 		if (typeof(this._allDataChannels) != 'undefined') {
136 | 			for (var i in this._allDataChannels) {
137 | 				this._allDataChannels[i]._identify();
138 | 			}
139 | 		}
140 | 		setLocalDescription.apply(this, arguments);
141 | 	};
142 | 
143 | 	PeerConnection.prototype.setRemoteDescription = function(description) {
144 | 		this._remoteDescription = description;
145 | 		if (typeof(this._allDataChannels) != 'undefined') {
146 | 			for (var i in this._allDataChannels) {
147 | 				this._allDataChannels[i]._identify();
148 | 			}
149 | 		};
150 | 		setRemoteDescription.apply(this, arguments);
151 | 	};
152 | 
153 | }());
154 | 


--------------------------------------------------------------------------------
/server.js:
--------------------------------------------------------------------------------
  1 | // SSL Certificates
  2 | var fs = require('fs');
  3 | 
  4 | var options = {key:  fs.readFileSync('certs/privatekey.pem').toString(),
  5 |                cert: fs.readFileSync('certs/certificate.pem').toString(),
  6 |                ca:  [fs.readFileSync('certs/certrequest.csr').toString()]}
  7 | 
  8 | // Get AppFog port, or set 8080 as default one (dotCloud mandatory)
  9 | var port = process.env.VMC_APP_PORT || 8080
 10 | 
 11 | // HTTP server
 12 | function requestListener(req, res)
 13 | {
 14 |   res.writeHead(200, {'Content-Type': 'text/html'});
 15 |   res.write('This is a DataChannel polyfill backend server. ')
 16 |   res.write('You can get a copy of the source code at ')
 17 |   res.end('<a href="https://github.com/piranna/DataChannel-polyfill">GitHub</a>')
 18 | }
 19 | 
 20 | var server = require('http').createServer(requestListener)
 21 | //var server = require('https').createServer(options, requestListener)
 22 |     server.listen(port);
 23 | 
 24 | // DataChannel proxy server
 25 | var WebSocketServer = require('ws').Server
 26 | var wss = new WebSocketServer({server: server});
 27 | 
 28 | //Dict to store connections
 29 | wss.sockets = {}
 30 | 
 31 | wss.on('connection', function(socket)
 32 | {
 33 |     // Forward raw message to the other peer
 34 |     function onmessage_proxy(message)
 35 |     {
 36 |         this.peer.send(message.data)
 37 |     };
 38 | 
 39 |     // Handshake
 40 |     socket.onmessage = function(message)
 41 |     {
 42 |         var args = JSON.parse(message.data)
 43 | 
 44 |         var eventName = args[0]
 45 |         var socketId  = args[1]
 46 | 
 47 |         var soc = wss.sockets[socketId]
 48 | 
 49 |         switch(eventName)
 50 |         {
 51 |             case 'create':  // socketId is the peer ID
 52 |                 if(soc)
 53 |                 {
 54 |                     // Both peers support native DataChannels
 55 |                     if(args[3] && soc.nativeSupport)
 56 |                     {
 57 |                         // Notify that both peers has native support
 58 |                         socket.send(JSON.stringify(['create.native']))
 59 |                         soc.send(JSON.stringify(['create.native']))
 60 | 
 61 |                         // Close both peers since they have native support
 62 |                         socket.close();
 63 |                         soc.close();
 64 |                     }
 65 | 
 66 |                     // At least one of the peers doesn't support DataChannels
 67 |                     else
 68 |                     {
 69 |                         // Register the new peer connection
 70 |                         socket.id = id()
 71 |                         wss.sockets[socket.id] = socket
 72 | 
 73 |                         // Send the other peer the request to connect
 74 |                         args[1] = socket.id
 75 |                         args.splice(3, 1)
 76 | 
 77 |                         soc.send(JSON.stringify(args))
 78 |                     }
 79 |                 }
 80 | 
 81 |                 // Second peer was not connected
 82 |                 // Send error message and close socket
 83 |                 else
 84 |                 {
 85 |                     socket.send(JSON.stringify(['create.error', socketId]))
 86 |                     socket.close();
 87 |                 }
 88 | 
 89 |                 break
 90 | 
 91 |             case 'ready':   // socketId is the UDT ID
 92 |                 if(soc)
 93 |                 {
 94 |                     // Link peers and update onmessage event to just forward
 95 |                     socket.peer = soc
 96 |                     soc.peer = socket
 97 | 
 98 |                     socket.onmessage = onmessage_proxy
 99 |                     soc.onmessage = onmessage_proxy
100 | 
101 |                     // Send 'ready' signal to the first peer and dettach it
102 |                     soc.send(JSON.stringify(['ready']))
103 | 
104 |                     delete soc.id
105 |                     delete wss.sockets[socketId]
106 |                 }
107 | 
108 |                 // First peer was disconnected
109 |                 // Send error message and close socket
110 |                 else
111 |                 {
112 |                     socket.send(JSON.stringify(['ready.error', socketId]))
113 |                     socket.close();
114 |                 }
115 | 
116 |                 break
117 | 
118 |             // Register peer signaling socket with this ID
119 |             case 'setId':
120 |                 wss.sockets[socketId] = socket
121 |                 wss.sockets[socketId].nativeSupport = args[2]
122 |         }
123 |     };
124 | 
125 |     // Peer connection is closed, close the other end
126 |     socket.onclose = function()
127 |     {
128 |         // Sockets were connected, just close them
129 |         if(socket.peer != undefined)
130 |             socket.peer.close();
131 | 
132 |         // Socket was not connected, remove it from sockets list
133 |         else
134 |             delete wss.sockets[socket.id]
135 |     };
136 | })
137 | 
138 | // generate a 4 digit hex code randomly
139 | function S4()
140 | {
141 |   return (((1 + Math.random()) * 0x10000) | 0).toString(16).substring(1)
142 | }
143 | 
144 | // make a REALLY COMPLICATED AND RANDOM id, kudos to dennis
145 | function id()
146 | {
147 |   return S4()+S4() +"-"+ S4() +"-"+ S4() +"-"+ S4() +"-"+ S4()+S4()+S4()
148 | }


--------------------------------------------------------------------------------
/bin/build.js:
--------------------------------------------------------------------------------
  1 | /**
  2 |  * Module dependencies.
  3 |  */
  4 | 
  5 | var fs = require('fs')
  6 |   , package = JSON.parse(fs.readFileSync(__dirname+ '/../package.json'))
  7 |   , uglify = require('uglify-js');
  8 | 
  9 | /**
 10 |  * License headers.
 11 |  *
 12 |  * @api private
 13 |  */
 14 | 
 15 | var template = '/*! datachannel.%ext% build:' + package.version +
 16 |     ', %type%. Copyright(c) 2013 Jesús Leganés Combarro "Piranna" <piranna@gmail.com> */'
 17 |   , prefix = '\n(function(exports){\n'
 18 |   , development = template.replace('%type%', 'development').replace('%ext%', 'js')
 19 |   , production = template.replace('%type%', 'production').replace('%ext%', 'min.js')
 20 |   , suffix = '\n})(this);\n';
 21 | 
 22 | /**
 23 |  * If statements, these allows you to create server side & client side
 24 |  * compatible code using specially designed `if` statements that remove server
 25 |  * side designed code from the source files
 26 |  *
 27 |  * @api private
 28 |  */
 29 | 
 30 | var starttagIF = '// if node'
 31 |   , endtagIF = '// end node';
 32 | 
 33 | /**
 34 |  * The modules that are required to create a base build of BinaryJS client.
 35 |  *
 36 |  * @const
 37 |  * @type {Array}
 38 |  * @api private
 39 |  */
 40 | 
 41 | var base = [
 42 |     '../lib/EventTarget.js'
 43 |   , '../lib/reliable.min.js'
 44 |   , 'datachannel.js'
 45 | ];
 46 | 
 47 | var DIST_FOLDER   = '/../dist/';
 48 | var SOURCE_FOLDER = '/../src/';
 49 | var OUTPUT_NAME = 'datachannel';
 50 | 
 51 | 
 52 | /**
 53 |  * @param {Array} transports The transports that needs to be bundled.
 54 |  * @param {Object} [options] Options to configure the building process.
 55 |  * @param {Function} callback Last argument should always be the callback
 56 |  * @callback {String|Boolean} err An optional argument, if it exists than an
 57 |  *    error occurred during the build process.
 58 |  * @callback {String} result The result of the build process.
 59 |  * @api public
 60 |  */
 61 | 
 62 | var builder = module.exports = function () {
 63 |     var options, callback, error = null
 64 |     , args = Array.prototype.slice.call(arguments, 0)
 65 |     , settings = {
 66 |         minify: true
 67 |       , node: false
 68 |       , custom: []
 69 |       };
 70 | 
 71 |   // Fancy pancy argument support this makes any pattern possible mainly
 72 |   // because we require only one of each type
 73 |   args.forEach(function (arg) {
 74 |     var type = Object.prototype.toString.call(arg)
 75 |         .replace(/\[object\s(\w+)\]/gi , '$1' ).toLowerCase();
 76 | 
 77 |     switch (type) {
 78 |       case 'object':
 79 |         return options = arg;
 80 |       case 'function':
 81 |         return callback = arg;
 82 |     }
 83 |   });
 84 | 
 85 |   // Add defaults
 86 |   options = options || {};
 87 | 
 88 |   // Merge the data
 89 |   for(var option in options) {
 90 |     settings[option] = options[option];
 91 |   }
 92 | 
 93 |   var files = [];
 94 |   base.forEach(function (file) {
 95 |     files.push(__dirname + SOURCE_FOLDER + file);
 96 |   });
 97 | 
 98 |   var results = {};
 99 |   files.forEach(function (file) {
100 |     fs.readFile(file, function (err, content) {
101 |       if (err) error = err;
102 |       results[file] = content;
103 | 
104 |       // check if we are done yet, or not.. Just by checking the size of the result
105 |       // object.
106 |       if (Object.keys(results).length !== files.length) return;
107 | 
108 | 
109 |       // concatinate the file contents in order
110 |       var code = development
111 |         , ignore = 0;
112 |         
113 |       code += prefix;
114 | 
115 |       files.forEach(function (file) {
116 |         code += results[file];
117 |       });
118 | 
119 |       // check if we need to add custom code
120 |       if (settings.custom.length) {
121 |         settings.custom.forEach(function (content) {
122 |           code += content;
123 |         });
124 |       }
125 | 
126 |       if (!settings.node) {
127 |         code = code.split('\n').filter(function (line) {
128 |           // check if there are tags in here
129 |           var start = line.indexOf(starttagIF) >= 0
130 |             , end = line.indexOf(endtagIF) >= 0
131 |             , ret = ignore;
132 | 
133 |           // ignore the current line
134 |           if (start) {
135 |             ignore++;
136 |             ret = ignore;
137 |           }
138 | 
139 |           // stop ignoring the next line
140 |           if (end) {
141 |             ignore--;
142 |           }
143 | 
144 |           return ret == 0;
145 |         }).join('\n');
146 |       }
147 | 
148 |       code += suffix;
149 |       
150 |       // check if we need to process it any further
151 |       if (settings.minify) {
152 |         var ast = uglify.parser.parse(code);
153 |         ast = uglify.uglify.ast_mangle(ast);
154 |         ast = uglify.uglify.ast_squeeze(ast);
155 | 
156 |         code = production + uglify.uglify.gen_code(ast, { ascii_only: true });
157 |       }
158 | 
159 |       callback(error, code);
160 |     })
161 |   })
162 | };
163 | 
164 | /**
165 |  * @type {String}
166 |  * @api public
167 |  */
168 | 
169 | builder.version = package.version;
170 | 
171 | /**
172 |  * Command line support, this allows us to generate builds without having
173 |  * to load it as module.
174 |  */
175 | 
176 | if (!module.parent){
177 |   // the first 2 are `node` and the path to this file, we don't need them
178 |   var args = process.argv.slice(2);
179 |   // build a development build
180 |   builder(args.length ? args : false, { minify:false }, function (err, content) {
181 |     if (err) return console.error(err);
182 | 		console.log(__dirname);
183 |     fs.write(
184 |         fs.openSync(__dirname + DIST_FOLDER + OUTPUT_NAME + '.js', 'w')
185 |       , content
186 |       , 0
187 |       , 'utf8'
188 |     );
189 |     console.log('Successfully generated the development build: ' + OUTPUT_NAME + '.js');
190 |   });
191 | 
192 |   // and build a production build
193 |   builder(args.length ? args : false, function (err, content) {
194 |     if (err) return console.error(err);
195 | 
196 |     fs.write(
197 |         fs.openSync(__dirname + DIST_FOLDER + OUTPUT_NAME + '.min.js', 'w')
198 |       , content
199 |       , 0
200 |       , 'utf8'
201 |     );
202 |     console.log('Successfully generated the production build: ' + OUTPUT_NAME + '.min.js');
203 |   });
204 | }


--------------------------------------------------------------------------------
/test/client.js:
--------------------------------------------------------------------------------
  1 | var RTCPeerConnection = window.RTCPeerConnection || window.webkitRTCPeerConnection || window.mozRTCPeerConnection;
  2 | 
  3 | if(RTCPeerConnection == undefined)
  4 |   alert('Your browser is not supported or you have to turn on flags. In chrome'+
  5 |         ' you go to chrome://flags and turn on Enable PeerConnection remember '+
  6 |         'to restart chrome');
  7 | 
  8 | 
  9 | // Holds the STUN server to use for PeerConnections.
 10 | var SERVER = "stun:stun.l.google.com:19302";
 11 | 
 12 | // Reference to the lone PeerConnection instances.
 13 | var peerConnections = {};
 14 | 
 15 | 
 16 | // Chat functions
 17 | 
 18 | function addToChat(msg, color)
 19 | {
 20 |   // Sanitize the input
 21 |   msg = msg.replace(/</g, '&lt;');
 22 | 
 23 |   if(color)
 24 |     msg = '<span style="color: ' + color + '; padding-left: 15px">' + msg + '</span>';
 25 |   else
 26 |     msg = '<strong style="padding-left: 15px">' + msg + '</strong>';
 27 | 
 28 |   var messages = document.getElementById('messages');
 29 |       messages.innerHTML = messages.innerHTML + msg + '<br>';
 30 |       messages.scrollTop = 10000;
 31 | }
 32 | 
 33 | function initChat()
 34 | {
 35 |   var input = document.getElementById("chatinput");
 36 |   var color = "#"+((1<<24)*Math.random()|0).toString(16);
 37 | 
 38 |   input.addEventListener('keydown', function(event)
 39 |   {
 40 |     var key = event.which || event.keyCode;
 41 |     if(key === 13)
 42 |     {
 43 |       for(var peerConnection in peerConnections)
 44 |       {
 45 |         var channel = peerConnections[peerConnection]._datachannels['chat']
 46 |         if(channel)
 47 |           channel.send(JSON.stringify({"messages": input.value, "color": color}));
 48 |       }
 49 | 
 50 |       addToChat(input.value);
 51 |       input.value = "";
 52 |     }
 53 |   }, false);
 54 | }
 55 | 
 56 | 
 57 | // Create PeerConnection
 58 | 
 59 | function createPeerConnection(uid, socket)
 60 | {
 61 |     console.log('createPeerConnection '+uid);
 62 | 
 63 |     var pc = new RTCPeerConnection({iceServers: [{url: SERVER}]},
 64 |                                    {optional: [{RtpDataChannels: true}]});
 65 |         pc.onicecandidate = function(event)
 66 |         {
 67 |           if(event.candidate)
 68 |             socket.send(JSON.stringify(["peer.candidate", uid, event.candidate]));
 69 |         }
 70 | 
 71 |   peerConnections[uid] = pc
 72 | 
 73 |   return pc;
 74 | }
 75 | 
 76 | 
 77 | function initDataChannel(pc, channel)
 78 | {
 79 |   console.log("initDataChannel '"+channel.label+"' on "+pc);
 80 | 
 81 |   channel.onmessage = function(message)
 82 |   {
 83 |     var data = JSON.parse(message.data)
 84 | 
 85 |     addToChat(data.messages, data.color.toString(16))
 86 |   }
 87 |   channel.onclose = function()
 88 |   {
 89 |     delete pc._datachannels[channel.label]
 90 |   }
 91 | 
 92 |   pc._datachannels = {}
 93 |   pc._datachannels[channel.label] = channel
 94 | };
 95 | 
 96 | 
 97 | window.addEventListener('load', function()
 98 | {
 99 |   var socket = new WebSocket("ws://localhost:8000/");
100 |       socket.onopen = function()
101 |       {
102 |         socket.onmessage = function(message)
103 |         {
104 |           console.log("RECEIVED: "+message.data);
105 | 
106 |           var args = JSON.parse(message.data);
107 | 
108 |           var eventName = args[0]
109 |           var uids      = args[1]
110 |           var sdp       = args[2]
111 | 
112 |           switch(eventName)
113 |           {
114 |             case 'peers':
115 |               for(var i = 0; i < uids.length; i++)
116 |               {
117 |                 var uid = uids[i]
118 | 
119 |                 // Create PeerConnection
120 |                 var pc = createPeerConnection(uid, socket);
121 | 
122 |                 var channel = pc.createDataChannel('chat')
123 |                 initDataChannel(pc, channel)
124 | 
125 |                 // Send offer to new PeerConnection
126 |                 pc.createOffer(function(offer)
127 |                 {
128 |                   console.log("createOffer: "+uid+", "+offer.sdp);
129 | 
130 |                   socket.send(JSON.stringify(["offer", uid, offer.sdp]));
131 | 
132 |                   pc.setLocalDescription(offer);
133 |                 },
134 |                 function(code)
135 |                 {
136 |                   console.error("Failure callback: " + code);
137 |                 });
138 |               }
139 |             break
140 | 
141 |             case 'offer':
142 |               var uid = uids
143 | 
144 |               var pc = peerConnections[uid];
145 |                   pc.setRemoteDescription(new RTCSessionDescription({sdp:  sdp,
146 |                                                                      type: 'offer'}));
147 | 
148 |               // Send answer
149 |               pc.createAnswer(function(answer)
150 |               {
151 |                 console.log("createAnswer: "+uid+", "+answer.sdp);
152 | 
153 |                 socket.send(JSON.stringify(["answer", uid, answer.sdp]));
154 | 
155 |                 pc.setLocalDescription(answer);
156 |               });
157 |             break
158 | 
159 |             case 'answer':
160 |               var uid = uids
161 | 
162 |               var pc = peerConnections[uid];
163 |                   pc.setRemoteDescription(new RTCSessionDescription({sdp:  sdp,
164 |                                                                      type: 'answer'}));
165 |               break
166 | 
167 |             case 'peer.candidate':
168 |               var uid = uids
169 |               var candidate = new RTCIceCandidate(sdp)
170 | 
171 |               var pc = peerConnections[uid];
172 |                   pc.addIceCandidate(candidate);
173 |             break
174 | 
175 |             case 'peer.create':
176 |               var uid = uids
177 | 
178 |               var pc = createPeerConnection(uid, socket);
179 |                   pc.addEventListener('datachannel', function(event)
180 |                   {
181 |                     initDataChannel(pc, event.channel)
182 |                   })
183 |             break
184 | 
185 |             case 'peer.remove':
186 |               var uid = uids
187 | 
188 |               delete peerConnections[uid];
189 |             break
190 |           }
191 |         };
192 |       };
193 |       socket.onerror = function(error)
194 |       {
195 |         console.error(error)
196 |       }
197 | 
198 | 
199 |   initChat();
200 | })


--------------------------------------------------------------------------------
/lib/reliable.min.js:
--------------------------------------------------------------------------------
1 | /*! reliable.min.js build:0.1.0, production. Copyright(c) 2013 Michelle Bu <michelle@michellebu.com> */(function(e){function n(){this._pieces=[],this._parts=[]}function r(e){this.index=0,this.dataBuffer=e,this.dataView=new Uint8Array(this.dataBuffer),this.length=this.dataBuffer.byteLength}function i(e){this.utf8=e,this.bufferBuilder=new n}function o(e,t){if(!(this instanceof o))return new o(e);this._dc=e,s.debug=t,this._outgoing={},this._incoming={},this._received={},this._window=1e3,this._mtu=500,this._interval=0,this._count=0,this._queue=[],this._setupDC()}var t={};t.useBlobBuilder=function(){try{return new Blob([]),!1}catch(e){return!0}}(),t.useArrayBufferView=!t.useBlobBuilder&&function(){try{return(new Blob([new Uint8Array([])])).size===0}catch(e){return!0}}(),e.binaryFeatures=t,e.BlobBuilder=window.WebKitBlobBuilder||window.MozBlobBuilder||window.MSBlobBuilder||window.BlobBuilder,n.prototype.append=function(e){typeof 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/src/datachannel.js:
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  1 | /**
  2 |  * DataChannel polyfill
  3 |  *
  4 |  * Web browser polyfill that implements the WebRTC DataChannel API over a
  5 |  * websocket. It implements the full latest DataChannel API specification
  6 |  * defined at 2013-01-16.
  7 |  *
  8 |  * Copyright (C) 2012-2013 Jesús Leganés Combarro "Piranna" <piranna@gmail.com>
  9 |  *
 10 |  * This code can be found at https://github.com/piranna/DataChannel-polyfill
 11 |  *
 12 |  *
 13 |  * This program is free software: you can redistribute it and/or modify it under
 14 |  * the terms of the GNU Affero General Public License as published by the Free
 15 |  * Software Foundation, either version 3 of the License, or (at your option) any
 16 |  * later version.
 17 |  *
 18 |  * This program is distributed in the hope that it will be useful, but WITHOUT
 19 |  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 20 |  * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 21 |  * details.
 22 |  *
 23 |  * You should have received a copy of the GNU Affero General Public License
 24 |  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 25 |  */
 26 | 
 27 | 
 28 | /**
 29 |  * Install the polyfill
 30 |  * @param {String} ws_url URL to the backend server
 31 |  */
 32 | function DCPF_install(ws_url)
 33 | {
 34 |   // Fallbacks for vendor-specific variables until the spec is finalized.
 35 |   var RTCPeerConnection = window.RTCPeerConnection || window.webkitRTCPeerConnection || window.mozRTCPeerConnection;
 36 | 
 37 |   // Check if browser has support for WebRTC PeerConnection
 38 |   if(RTCPeerConnection == undefined)
 39 |   {
 40 |     console.error("Your browser doesn't support RTCPeerConnection, please use "+
 41 |                   "one of the latest versions of Chrome/Chromium or Firefox");
 42 |     return "old browser";
 43 |   }
 44 | 
 45 |   var createDataChannel;
 46 |   var supportReliable = false;
 47 | 
 48 |   //Holds the STUN server to use for PeerConnections.
 49 |   var SERVER = "stun:stun.l.google.com:19302";
 50 | 
 51 |   // Check if browser has support for native WebRTC DataChannel
 52 |   var pc = new RTCPeerConnection({iceServers: [{url: SERVER}]},
 53 |                                  {optional: [{RtpDataChannels: true}]})
 54 | 
 55 |   try
 56 |   {
 57 |     // Check native
 58 |     pc.createDataChannel('DCPF_install__checkSupport',{reliable:false}).close();
 59 | 
 60 |     // Native support available, store the function
 61 |     createDataChannel = pc.createDataChannel
 62 | 
 63 |     // Check reliable
 64 |     pc.createDataChannel('DCPF_install__checkSupport').close();
 65 | 
 66 |     // Native reliable support available
 67 |     supportReliable = true
 68 |   }
 69 |   catch(e){}
 70 |   finally
 71 |   {
 72 |     pc.close()
 73 |   }
 74 | 
 75 | 
 76 |   // DataChannel polyfill using WebSockets as 'underlying data transport'
 77 |   function RTCDataChannel(label, dataChannelDict)
 78 |   {
 79 |     var self = this
 80 | 
 81 |     EventTarget.call(this)
 82 | 
 83 |     this.close = function()
 84 |     {
 85 |       if(this._udt)
 86 |          this._udt.close()
 87 |     }
 88 |     this.send  = function(data)
 89 |     {
 90 |       if(this._udt)
 91 |          this._udt.send(data)
 92 |     }
 93 | 
 94 |     // binaryType
 95 |     this.__defineGetter__("binaryType", function()
 96 |     {
 97 |       return self._udt.binaryType;
 98 |     });
 99 |     this.__defineSetter__("binaryType", function(binaryType)
100 |     {
101 |       self._udt.binaryType = binaryType;
102 |     });
103 | 
104 |     // bufferedAmount
105 |     this.__defineGetter__("bufferedAmount", function()
106 |     {
107 |       if(!self._udt)
108 |         return 0
109 | 
110 |       return self._udt.bufferedAmount;
111 |     });
112 | 
113 |     // label
114 |     this.__defineGetter__("label", function()
115 |     {
116 |       return label;
117 |     });
118 | 
119 |     // readyState
120 |     this.__defineGetter__("readyState", function()
121 |     {
122 |       if(!self._udt)
123 |         return "connecting"
124 | 
125 |       switch(self._udt.readyState)
126 |       {
127 |         case 0: return "connecting"
128 |         case 1: return "open"
129 |         case 2: return "closing"
130 |         case 3: return "closed"
131 |       }
132 |     });
133 | 
134 |     // id
135 |     var id = (dataChannelDict.id != undefined) ? dataChannelDict.id : 0
136 |     this.__defineGetter__("id", function()
137 |     {
138 |       return id;
139 |     });
140 | 
141 |     // maxRetransmitTime
142 |     var maxRetransmitTime = (dataChannelDict.maxRetransmitTime != undefined) ? dataChannelDict.maxRetransmitTime : null
143 |     this.__defineGetter__("maxRetransmitTime", function()
144 |     {
145 |       return maxRetransmitTime;
146 |     });
147 | 
148 |     // maxRetransmits
149 |     var maxRetransmits = (dataChannelDict.maxRetransmits != undefined) ? dataChannelDict.maxRetransmits : null
150 |     this.__defineGetter__("maxRetransmits", function()
151 |     {
152 |       return maxRetransmits;
153 |     });
154 | 
155 |     if(maxRetransmitTime && maxRetransmits)
156 |       throw SyntaxError
157 | 
158 |     var reliable = !(maxRetransmitTime || maxRetransmits)
159 | 
160 |     // negotiated
161 |     var negotiated = (dataChannelDict.negotiated != undefined) ? dataChannelDict.negotiated : false
162 |     this.__defineGetter__("negotiated", function()
163 |     {
164 |       return negotiated;
165 |     });
166 | 
167 |     // ordered
168 |     var ordered = (dataChannelDict.ordered != undefined) ? dataChannelDict.ordered : false
169 |     this.__defineGetter__("ordered", function()
170 |     {
171 |       return ordered;
172 |     });
173 | 
174 |     // protocol
175 |     var protocol = (dataChannelDict.protocol != undefined) ? dataChannelDict.protocol : ""
176 |     this.__defineGetter__("protocol", function()
177 |     {
178 |       return protocol;
179 |     });
180 |   }
181 | 
182 | 
183 |   function createUDT(pc, channel, onopen)
184 |   {
185 |     pc._channels = pc._channels || {}
186 |     pc._channels[channel.label] = channel
187 | 
188 |     if(!pc._peerId)
189 |     {
190 |       console.warn("No peer ID")
191 |       return
192 |     }
193 | 
194 |     console.info("Creating UDT")
195 | 
196 |     // Use a WebSocket as 'underlying data transport' to create the DataChannel
197 |     channel._udt = new WebSocket(ws_url)
198 |     channel._udt.addEventListener('close', function(event)
199 |     {
200 | //      if(error && channel.onerror)
201 | //      {
202 | //        channel.onerror(error)
203 | //        return
204 | //      }
205 | 
206 |       channel.dispatchEvent(event);
207 |     })
208 |     channel._udt.addEventListener('error', function(event)
209 |     {
210 |       channel.dispatchEvent(event);
211 |     })
212 |     channel._udt.addEventListener('open', function(event)
213 |     {
214 |       onopen(channel, pc)
215 |     })
216 |   }
217 | 
218 | 
219 |   // Public function to initiate the creation of a new DataChannel
220 |   if(createDataChannel && !supportReliable && Reliable)
221 |   {
222 |     RTCPeerConnection.prototype.createDataChannel = function(label, dataChannelDict)
223 |     {
224 |       dataChannelDict = dataChannelDict || {}
225 |       dataChannelDict.reliable = false
226 | 
227 |       var channel = new Reliable(createDataChannel.call(this, label, dataChannelDict))
228 |           channel.label = label
229 | 
230 |       return channel
231 |     }
232 | 
233 |     var dispatchEvent = RTCPeerConnection.prototype.dispatchEvent;
234 |     RTCPeerConnection.prototype.dispatchEvent = function(event)
235 |     {
236 |       var channel = event.channel;
237 | 
238 |       if(event.type == 'datachannel' && !(channel instanceof Reliable))
239 |       {
240 |         event.channel = new Reliable(channel)
241 |         event.channel.label = channel.label
242 |       }
243 | 
244 |       dispatchEvent.call(this, event)
245 |     };
246 |   }
247 | 
248 |   else
249 |     RTCPeerConnection.prototype.createDataChannel = function(label, dataChannelDict)
250 |     {
251 |       // Back-ward compatibility
252 |       if(this.readyState)
253 |          this.signalingState = this.readyState
254 |       // Back-ward compatibility
255 | 
256 |       if(this.signalingState == "closed")
257 |         throw INVALID_STATE;
258 | 
259 |       if(!label)
260 |         throw "'label' is not defined"
261 |       dataChannelDict = dataChannelDict || {}
262 | 
263 |       var channel = new RTCDataChannel(label, dataChannelDict)
264 | 
265 |       createUDT(this, channel, onopen)
266 | 
267 |       return channel
268 |     }
269 | 
270 | 
271 |   // Private function to 'catch' the 'ondatachannel' event
272 |   function ondatachannel(pc, socketId, label, dataChannelDict)
273 |   {
274 |     // Back-ward compatibility
275 |     if(pc.readyState)
276 |       pc.signalingState = pc.readyState
277 |     // Back-ward compatibility
278 | 
279 |     if(pc.signalingState == "closed")
280 |       return;
281 | 
282 |     var channel = new RTCDataChannel(label, dataChannelDict)
283 | 
284 |     createUDT(pc, channel, function(channel)
285 |     {
286 |       // Set channel as open
287 |       channel.send(JSON.stringify(["ready", socketId]))
288 | 
289 |       // Set onmessage event to bypass messages to user defined function
290 |       channel._udt.onmessage = function(event)
291 |       {
292 |         channel.dispatchEvent(event);
293 |       }
294 | 
295 |       // Set channel as open
296 |       var event = document.createEvent('Event')
297 |           event.initEvent('open', true, true)
298 | 
299 |       channel.dispatchEvent(event);
300 |     })
301 | 
302 |     var event = document.createEvent('Event')
303 |         event.initEvent('datachannel', true, true)
304 |         event.channel = channel
305 | 
306 |     pc.dispatchEvent(event);
307 |   }
308 | 
309 | 
310 |   function onopen(channel, pc)
311 |   {
312 |     // Wait until the other end of the channel is ready
313 |     channel._udt.onmessage = function(message)
314 |     {
315 |       var args = JSON.parse(message.data);
316 | 
317 |       var eventName = args[0]
318 | 
319 |       switch(eventName)
320 |       {
321 |         // Both peers support native DataChannels
322 |         case 'create.native':
323 |         {
324 |           // Close the ad-hoc signaling channel
325 |           if(pc._signaling)
326 |              pc._signaling.close();
327 | 
328 |           // Make native DataChannels to be created by default
329 |           pc.createDataChannel = createDataChannel
330 | 
331 |           // Start native DataChannel connection
332 |           channel._udt = pc.createDataChannel(channel.label, channel.reliable)
333 |         }
334 |         break
335 | 
336 |         // Connection through backend server is ready
337 |         case 'ready':
338 |         {
339 |           // Back-ward compatibility
340 |           if(pc.readyState)
341 |              pc.signalingState = pc.readyState
342 |           // Back-ward compatibility
343 | 
344 |           // PeerConnection is closed, do nothing
345 |           if(self.signalingState == "closed")
346 |             return;
347 | 
348 |           // Set onmessage event to bypass messages to user defined function
349 |           channel._udt.onmessage = function(event)
350 |           {
351 |             channel.dispatchEvent(event);
352 |           }
353 | 
354 |           // Set channel as open
355 |           var event = document.createEvent('Event')
356 |               event.initEvent('open', true, true)
357 | 
358 |           channel.dispatchEvent(event);
359 |         }
360 |         break
361 | 
362 |         default:
363 |           console.error("Unknown event '"+eventName+"'")
364 |       }
365 |     }
366 | 
367 |     // Query to the other peer to create a new DataChannel with us
368 |     channel.send(JSON.stringify(['create', pc._peerId, channel.label,
369 |                                  channel.reliable, Boolean(createDataChannel)]))
370 |   }
371 | 
372 | 
373 |   // Get the SDP session ID from a RTCSessionDescription object
374 |   function getId(description)
375 |   {
376 |     var pattern = /^o=.+/gm
377 |     var result = pattern.exec(description.sdp);
378 | 
379 |     return result[0].substring(2)
380 |   }
381 | 
382 |   // Overwrite setters to catch the session IDs
383 |   var setLocalDescription  = RTCPeerConnection.prototype.setLocalDescription
384 |   var setRemoteDescription = RTCPeerConnection.prototype.setRemoteDescription
385 |   var closeRTC = RTCPeerConnection.prototype.close;
386 | 
387 |   RTCPeerConnection.prototype.close = function()
388 |   {
389 |     if(this._signaling)
390 |        this._signaling.close();
391 | 
392 |     closeRTC.call(this);
393 |   };
394 | 
395 |   if(!createDataChannel)
396 |   RTCPeerConnection.prototype.setLocalDescription = function(description,
397 |                                                              successCallback,
398 |                                                              failureCallback)
399 |   {
400 |     var self = this
401 | 
402 |     // Create a signalling channel with a WebSocket on the proxy server with the
403 |     // defined ID and wait for new 'create' messages to create new DataChannels
404 |     if(this._signaling)
405 |        this._signaling.close();
406 | 
407 |     this._signaling = new WebSocket(ws_url)
408 |     this._signaling.onopen = function(event)
409 |     {
410 |       this.onmessage = function(event)
411 |       {
412 |         var args = JSON.parse(event.data)
413 | 
414 |         switch(args[0])
415 |         {
416 |           case 'create':
417 |             ondatachannel(self, args[1], args[2], {reliable: args[3]})
418 |             break
419 | 
420 |           // Both peers support native DataChannels
421 |           case 'create.native':
422 |             // Make native DataChannels to be created by default
423 |             self.createDataChannel = createDataChannel
424 |         }
425 |       }
426 | 
427 |       this.send(JSON.stringify(['setId', "pc."+getId(description),
428 |                                 Boolean(createDataChannel)]))
429 |     }
430 |     this._signaling.onerror = function(error)
431 |     {
432 |       console.error(error)
433 |     }
434 | 
435 |     setLocalDescription.call(this, description, successCallback, failureCallback)
436 |   }
437 | 
438 |   if(!createDataChannel)
439 |   RTCPeerConnection.prototype.setRemoteDescription = function(description,
440 |                                                               successCallback,
441 |                                                               failureCallback)
442 |   {
443 |     // Set the PeerConnection peer ID
444 |     this._peerId = "pc."+getId(description)
445 | 
446 |     // Initialize pending channels
447 |     for(var label in this._channels)
448 |     {
449 |       var channel = this._channels[label]
450 | 
451 |       if(channel._udt == undefined)
452 |         createUDT(this, channel, onopen)
453 |     }
454 | 
455 |     setRemoteDescription.call(this, description, successCallback, failureCallback)
456 |   }
457 | 
458 |   if(createDataChannel && !supportReliable && Reliable)
459 |   {
460 |     var createOffer  = RTCPeerConnection.prototype.createOffer;
461 |     var createAnswer = RTCPeerConnection.prototype.createAnswer;
462 | 
463 |     RTCPeerConnection.prototype.createOffer = function(successCallback,
464 |                                                        failureCallback,
465 |                                                        constraints)
466 |     {
467 |       createOffer.call(this, function(offer)
468 |       {
469 |         offer.sdp = Reliable.higherBandwidthSDP(offer.sdp);
470 |         successCallback(offer)
471 |       },
472 |       failureCallback, constraints)
473 |     }
474 | 
475 |     RTCPeerConnection.prototype.createAnswer = function(successCallback,
476 |                                                         failureCallback,
477 |                                                         constraints)
478 |     {
479 |       createAnswer.call(this, function(answer)
480 |       {
481 |         answer.sdp = Reliable.higherBandwidthSDP(answer.sdp);
482 |         successCallback(answer)
483 |       },
484 |       failureCallback, constraints)
485 |     }
486 |   }
487 | 
488 | 
489 | 
490 |   // Notify to the user if we have native DataChannels support or not
491 |   if(createDataChannel)
492 |   {
493 |     if(supportReliable)
494 |     {
495 |       console.log("Both native and polyfill WebRTC DataChannel are available");
496 |       return "native";
497 |     }
498 | 
499 |     if(Reliable)
500 |       console.warn("Native WebRTC DataChannel is not reliable, using polyfill instead");
501 |     else
502 |       console.error("Native WebRTC DataChannel is not reliable and not included polyfill");
503 | 
504 |     return "native no reliable";
505 |   }
506 | 
507 |   console.warn("WebRTC DataChannel is only available thought polyfill");
508 |   return "polyfill";
509 | }
510 | 
511 | exports.DCPF_install = DCPF_install;


--------------------------------------------------------------------------------
/dist/datachannel.min.js:
--------------------------------------------------------------------------------
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/dist/datachannel.js:
--------------------------------------------------------------------------------
  1 | /*! datachannel.js build:1.0.0-3, development. Copyright(c) 2013 Jesús Leganés Combarro "Piranna" <piranna@gmail.com> */
  2 | (function(exports){
  3 | /**
  4 |  * @author mrdoob / http://mrdoob.com/
  5 |  * @author Jesús Leganés Combarro "Piranna" <piranna@gmail.com>
  6 |  */
  7 | 
  8 | var EventTarget = function()
  9 | {
 10 | 	var listeners = {};
 11 | 
 12 | 	this.addEventListener = function(type, listener)
 13 | 	{
 14 | 		if(listeners[type] === undefined)
 15 | 			listeners[type] = [];
 16 | 
 17 | 		if(listeners[type].indexOf(listener) === -1)
 18 | 			listeners[type].push(listener);
 19 | 	};
 20 | 
 21 | 	this.dispatchEvent = function(event)
 22 | 	{
 23 | 		var listenerArray = (listeners[event.type] || []);
 24 | 
 25 | 		var dummyListener = this['on' + event.type];
 26 | 		if(typeof dummyListener == 'function')
 27 | 			listenerArray = listenerArray.concat(dummyListener);
 28 | 
 29 | 		for(var i=0, l=listenerArray.length; i<l; i++)
 30 | 			listenerArray[i].call(this, event);
 31 | 	};
 32 | 
 33 | 	this.removeEventListener = function(type, listener)
 34 | 	{
 35 | 		var index = listeners[type].indexOf(listener);
 36 | 
 37 | 		if(index !== -1)
 38 | 			listeners[type].splice(index, 1);
 39 | 	};
 40 | };
 41 | 
 42 | exports.EventTarget = EventTarget;/*! reliable.min.js build:0.1.0, production. 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r=this._listeners[t]=function(e){t.call(n,e)};this._dc.addEventListener(e,r)},o.prototype.dispatchEvent=function(e){this._dc.dispatchEvent(e)},o.prototype.removeEventListener=function(e,t){var n=this._listeners[t];this._dc.removeEventListener(e,n)},o.prototype.onmessage=function(e){},e.Reliable=o})(this)/**
 43 |  * DataChannel polyfill
 44 |  *
 45 |  * Web browser polyfill that implements the WebRTC DataChannel API over a
 46 |  * websocket. It implements the full latest DataChannel API specification
 47 |  * defined at 2013-01-16.
 48 |  *
 49 |  * Copyright (C) 2012-2013 Jesús Leganés Combarro "Piranna" <piranna@gmail.com>
 50 |  *
 51 |  * This code can be found at https://github.com/piranna/DataChannel-polyfill
 52 |  *
 53 |  *
 54 |  * This program is free software: you can redistribute it and/or modify it under
 55 |  * the terms of the GNU Affero General Public License as published by the Free
 56 |  * Software Foundation, either version 3 of the License, or (at your option) any
 57 |  * later version.
 58 |  *
 59 |  * This program is distributed in the hope that it will be useful, but WITHOUT
 60 |  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 61 |  * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 62 |  * details.
 63 |  *
 64 |  * You should have received a copy of the GNU Affero General Public License
 65 |  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 66 |  */
 67 | 
 68 | 
 69 | /**
 70 |  * Install the polyfill
 71 |  * @param {String} ws_url URL to the backend server
 72 |  */
 73 | function DCPF_install(ws_url)
 74 | {
 75 |   // Fallbacks for vendor-specific variables until the spec is finalized.
 76 |   var RTCPeerConnection = window.RTCPeerConnection || window.webkitRTCPeerConnection || window.mozRTCPeerConnection;
 77 | 
 78 |   // Check if browser has support for WebRTC PeerConnection
 79 |   if(RTCPeerConnection == undefined)
 80 |   {
 81 |     console.error("Your browser doesn't support RTCPeerConnection, please use "+
 82 |                   "one of the latest versions of Chrome/Chromium or Firefox");
 83 |     return "old browser";
 84 |   }
 85 | 
 86 |   var createDataChannel;
 87 |   var supportReliable = false;
 88 | 
 89 |   //Holds the STUN server to use for PeerConnections.
 90 |   var SERVER = "stun:stun.l.google.com:19302";
 91 | 
 92 |   // Check if browser has support for native WebRTC DataChannel
 93 |   var pc = new RTCPeerConnection({iceServers: [{url: SERVER}]},
 94 |                                  {optional: [{RtpDataChannels: true}]})
 95 | 
 96 |   try
 97 |   {
 98 |     // Check native
 99 |     pc.createDataChannel('DCPF_install__checkSupport',{reliable:false}).close();
100 | 
101 |     // Native support available, store the function
102 |     createDataChannel = pc.createDataChannel
103 | 
104 |     // Check reliable
105 |     pc.createDataChannel('DCPF_install__checkSupport').close();
106 | 
107 |     // Native reliable support available
108 |     supportReliable = true
109 |   }
110 |   catch(e){}
111 |   finally
112 |   {
113 |     pc.close()
114 |   }
115 | 
116 | 
117 |   // DataChannel polyfill using WebSockets as 'underlying data transport'
118 |   function RTCDataChannel(label, dataChannelDict)
119 |   {
120 |     var self = this
121 | 
122 |     EventTarget.call(this)
123 | 
124 |     this.close = function()
125 |     {
126 |       if(this._udt)
127 |          this._udt.close()
128 |     }
129 |     this.send  = function(data)
130 |     {
131 |       if(this._udt)
132 |          this._udt.send(data)
133 |     }
134 | 
135 |     // binaryType
136 |     this.__defineGetter__("binaryType", function()
137 |     {
138 |       return self._udt.binaryType;
139 |     });
140 |     this.__defineSetter__("binaryType", function(binaryType)
141 |     {
142 |       self._udt.binaryType = binaryType;
143 |     });
144 | 
145 |     // bufferedAmount
146 |     this.__defineGetter__("bufferedAmount", function()
147 |     {
148 |       if(!self._udt)
149 |         return 0
150 | 
151 |       return self._udt.bufferedAmount;
152 |     });
153 | 
154 |     // label
155 |     this.__defineGetter__("label", function()
156 |     {
157 |       return label;
158 |     });
159 | 
160 |     // readyState
161 |     this.__defineGetter__("readyState", function()
162 |     {
163 |       if(!self._udt)
164 |         return "connecting"
165 | 
166 |       switch(self._udt.readyState)
167 |       {
168 |         case 0: return "connecting"
169 |         case 1: return "open"
170 |         case 2: return "closing"
171 |         case 3: return "closed"
172 |       }
173 |     });
174 | 
175 |     // id
176 |     var id = (dataChannelDict.id != undefined) ? dataChannelDict.id : 0
177 |     this.__defineGetter__("id", function()
178 |     {
179 |       return id;
180 |     });
181 | 
182 |     // maxRetransmitTime
183 |     var maxRetransmitTime = (dataChannelDict.maxRetransmitTime != undefined) ? dataChannelDict.maxRetransmitTime : null
184 |     this.__defineGetter__("maxRetransmitTime", function()
185 |     {
186 |       return maxRetransmitTime;
187 |     });
188 | 
189 |     // maxRetransmits
190 |     var maxRetransmits = (dataChannelDict.maxRetransmits != undefined) ? dataChannelDict.maxRetransmits : null
191 |     this.__defineGetter__("maxRetransmits", function()
192 |     {
193 |       return maxRetransmits;
194 |     });
195 | 
196 |     if(maxRetransmitTime && maxRetransmits)
197 |       throw SyntaxError
198 | 
199 |     var reliable = !(maxRetransmitTime || maxRetransmits)
200 | 
201 |     // negotiated
202 |     var negotiated = (dataChannelDict.negotiated != undefined) ? dataChannelDict.negotiated : false
203 |     this.__defineGetter__("negotiated", function()
204 |     {
205 |       return negotiated;
206 |     });
207 | 
208 |     // ordered
209 |     var ordered = (dataChannelDict.ordered != undefined) ? dataChannelDict.ordered : false
210 |     this.__defineGetter__("ordered", function()
211 |     {
212 |       return ordered;
213 |     });
214 | 
215 |     // protocol
216 |     var protocol = (dataChannelDict.protocol != undefined) ? dataChannelDict.protocol : ""
217 |     this.__defineGetter__("protocol", function()
218 |     {
219 |       return protocol;
220 |     });
221 |   }
222 | 
223 | 
224 |   function createUDT(pc, channel, onopen)
225 |   {
226 |     pc._channels = pc._channels || {}
227 |     pc._channels[channel.label] = channel
228 | 
229 |     if(!pc._peerId)
230 |     {
231 |       console.warn("No peer ID")
232 |       return
233 |     }
234 | 
235 |     console.info("Creating UDT")
236 | 
237 |     // Use a WebSocket as 'underlying data transport' to create the DataChannel
238 |     channel._udt = new WebSocket(ws_url)
239 |     channel._udt.addEventListener('close', function(event)
240 |     {
241 | //      if(error && channel.onerror)
242 | //      {
243 | //        channel.onerror(error)
244 | //        return
245 | //      }
246 | 
247 |       channel.dispatchEvent(event);
248 |     })
249 |     channel._udt.addEventListener('error', function(event)
250 |     {
251 |       channel.dispatchEvent(event);
252 |     })
253 |     channel._udt.addEventListener('open', function(event)
254 |     {
255 |       onopen(channel, pc)
256 |     })
257 |   }
258 | 
259 | 
260 |   // Public function to initiate the creation of a new DataChannel
261 |   if(createDataChannel && !supportReliable && Reliable)
262 |   {
263 |     RTCPeerConnection.prototype.createDataChannel = function(label, dataChannelDict)
264 |     {
265 |       dataChannelDict = dataChannelDict || {}
266 |       dataChannelDict.reliable = false
267 | 
268 |       var channel = new Reliable(createDataChannel.call(this, label, dataChannelDict))
269 |           channel.label = label
270 | 
271 |       return channel
272 |     }
273 | 
274 |     var dispatchEvent = RTCPeerConnection.prototype.dispatchEvent;
275 |     RTCPeerConnection.prototype.dispatchEvent = function(event)
276 |     {
277 |       var channel = event.channel;
278 | 
279 |       if(event.type == 'datachannel' && !(channel instanceof Reliable))
280 |       {
281 |         event.channel = new Reliable(channel)
282 |         event.channel.label = channel.label
283 |       }
284 | 
285 |       dispatchEvent.call(this, event)
286 |     };
287 |   }
288 | 
289 |   else
290 |     RTCPeerConnection.prototype.createDataChannel = function(label, dataChannelDict)
291 |     {
292 |       // Back-ward compatibility
293 |       if(this.readyState)
294 |          this.signalingState = this.readyState
295 |       // Back-ward compatibility
296 | 
297 |       if(this.signalingState == "closed")
298 |         throw INVALID_STATE;
299 | 
300 |       if(!label)
301 |         throw "'label' is not defined"
302 |       dataChannelDict = dataChannelDict || {}
303 | 
304 |       var channel = new RTCDataChannel(label, dataChannelDict)
305 | 
306 |       createUDT(this, channel, onopen)
307 | 
308 |       return channel
309 |     }
310 | 
311 | 
312 |   // Private function to 'catch' the 'ondatachannel' event
313 |   function ondatachannel(pc, socketId, label, dataChannelDict)
314 |   {
315 |     // Back-ward compatibility
316 |     if(pc.readyState)
317 |       pc.signalingState = pc.readyState
318 |     // Back-ward compatibility
319 | 
320 |     if(pc.signalingState == "closed")
321 |       return;
322 | 
323 |     var channel = new RTCDataChannel(label, dataChannelDict)
324 | 
325 |     createUDT(pc, channel, function(channel)
326 |     {
327 |       // Set channel as open
328 |       channel.send(JSON.stringify(["ready", socketId]))
329 | 
330 |       // Set onmessage event to bypass messages to user defined function
331 |       channel._udt.onmessage = function(event)
332 |       {
333 |         channel.dispatchEvent(event);
334 |       }
335 | 
336 |       // Set channel as open
337 |       var event = document.createEvent('Event')
338 |           event.initEvent('open', true, true)
339 | 
340 |       channel.dispatchEvent(event);
341 |     })
342 | 
343 |     var event = document.createEvent('Event')
344 |         event.initEvent('datachannel', true, true)
345 |         event.channel = channel
346 | 
347 |     pc.dispatchEvent(event);
348 |   }
349 | 
350 | 
351 |   function onopen(channel, pc)
352 |   {
353 |     // Wait until the other end of the channel is ready
354 |     channel._udt.onmessage = function(message)
355 |     {
356 |       var args = JSON.parse(message.data);
357 | 
358 |       var eventName = args[0]
359 | 
360 |       switch(eventName)
361 |       {
362 |         // Both peers support native DataChannels
363 |         case 'create.native':
364 |         {
365 |           // Close the ad-hoc signaling channel
366 |           if(pc._signaling)
367 |              pc._signaling.close();
368 | 
369 |           // Make native DataChannels to be created by default
370 |           pc.createDataChannel = createDataChannel
371 | 
372 |           // Start native DataChannel connection
373 |           channel._udt = pc.createDataChannel(channel.label, channel.reliable)
374 |         }
375 |         break
376 | 
377 |         // Connection through backend server is ready
378 |         case 'ready':
379 |         {
380 |           // Back-ward compatibility
381 |           if(pc.readyState)
382 |              pc.signalingState = pc.readyState
383 |           // Back-ward compatibility
384 | 
385 |           // PeerConnection is closed, do nothing
386 |           if(self.signalingState == "closed")
387 |             return;
388 | 
389 |           // Set onmessage event to bypass messages to user defined function
390 |           channel._udt.onmessage = function(event)
391 |           {
392 |             channel.dispatchEvent(event);
393 |           }
394 | 
395 |           // Set channel as open
396 |           var event = document.createEvent('Event')
397 |               event.initEvent('open', true, true)
398 | 
399 |           channel.dispatchEvent(event);
400 |         }
401 |         break
402 | 
403 |         default:
404 |           console.error("Unknown event '"+eventName+"'")
405 |       }
406 |     }
407 | 
408 |     // Query to the other peer to create a new DataChannel with us
409 |     channel.send(JSON.stringify(['create', pc._peerId, channel.label,
410 |                                  channel.reliable, Boolean(createDataChannel)]))
411 |   }
412 | 
413 | 
414 |   // Get the SDP session ID from a RTCSessionDescription object
415 |   function getId(description)
416 |   {
417 |     var pattern = /^o=.+/gm
418 |     var result = pattern.exec(description.sdp);
419 | 
420 |     return result[0].substring(2)
421 |   }
422 | 
423 |   // Overwrite setters to catch the session IDs
424 |   var setLocalDescription  = RTCPeerConnection.prototype.setLocalDescription
425 |   var setRemoteDescription = RTCPeerConnection.prototype.setRemoteDescription
426 |   var closeRTC = RTCPeerConnection.prototype.close;
427 | 
428 |   RTCPeerConnection.prototype.close = function()
429 |   {
430 |     if(this._signaling)
431 |        this._signaling.close();
432 | 
433 |     closeRTC.call(this);
434 |   };
435 | 
436 |   if(!createDataChannel)
437 |   RTCPeerConnection.prototype.setLocalDescription = function(description,
438 |                                                              successCallback,
439 |                                                              failureCallback)
440 |   {
441 |     var self = this
442 | 
443 |     // Create a signalling channel with a WebSocket on the proxy server with the
444 |     // defined ID and wait for new 'create' messages to create new DataChannels
445 |     if(this._signaling)
446 |        this._signaling.close();
447 | 
448 |     this._signaling = new WebSocket(ws_url)
449 |     this._signaling.onopen = function(event)
450 |     {
451 |       this.onmessage = function(event)
452 |       {
453 |         var args = JSON.parse(event.data)
454 | 
455 |         switch(args[0])
456 |         {
457 |           case 'create':
458 |             ondatachannel(self, args[1], args[2], {reliable: args[3]})
459 |             break
460 | 
461 |           // Both peers support native DataChannels
462 |           case 'create.native':
463 |             // Make native DataChannels to be created by default
464 |             self.createDataChannel = createDataChannel
465 |         }
466 |       }
467 | 
468 |       this.send(JSON.stringify(['setId', "pc."+getId(description),
469 |                                 Boolean(createDataChannel)]))
470 |     }
471 |     this._signaling.onerror = function(error)
472 |     {
473 |       console.error(error)
474 |     }
475 | 
476 |     setLocalDescription.call(this, description, successCallback, failureCallback)
477 |   }
478 | 
479 |   if(!createDataChannel)
480 |   RTCPeerConnection.prototype.setRemoteDescription = function(description,
481 |                                                               successCallback,
482 |                                                               failureCallback)
483 |   {
484 |     // Set the PeerConnection peer ID
485 |     this._peerId = "pc."+getId(description)
486 | 
487 |     // Initialize pending channels
488 |     for(var label in this._channels)
489 |     {
490 |       var channel = this._channels[label]
491 | 
492 |       if(channel._udt == undefined)
493 |         createUDT(this, channel, onopen)
494 |     }
495 | 
496 |     setRemoteDescription.call(this, description, successCallback, failureCallback)
497 |   }
498 | 
499 |   if(createDataChannel && !supportReliable && Reliable)
500 |   {
501 |     var createOffer  = RTCPeerConnection.prototype.createOffer;
502 |     var createAnswer = RTCPeerConnection.prototype.createAnswer;
503 | 
504 |     RTCPeerConnection.prototype.createOffer = function(successCallback,
505 |                                                        failureCallback,
506 |                                                        constraints)
507 |     {
508 |       createOffer.call(this, function(offer)
509 |       {
510 |         offer.sdp = Reliable.higherBandwidthSDP(offer.sdp);
511 |         successCallback(offer)
512 |       },
513 |       failureCallback, constraints)
514 |     }
515 | 
516 |     RTCPeerConnection.prototype.createAnswer = function(successCallback,
517 |                                                         failureCallback,
518 |                                                         constraints)
519 |     {
520 |       createAnswer.call(this, function(answer)
521 |       {
522 |         answer.sdp = Reliable.higherBandwidthSDP(answer.sdp);
523 |         successCallback(answer)
524 |       },
525 |       failureCallback, constraints)
526 |     }
527 |   }
528 | 
529 | 
530 | 
531 |   // Notify to the user if we have native DataChannels support or not
532 |   if(createDataChannel)
533 |   {
534 |     if(supportReliable)
535 |     {
536 |       console.log("Both native and polyfill WebRTC DataChannel are available");
537 |       return "native";
538 |     }
539 | 
540 |     if(Reliable)
541 |       console.warn("Native WebRTC DataChannel is not reliable, using polyfill instead");
542 |     else
543 |       console.error("Native WebRTC DataChannel is not reliable and not included polyfill");
544 | 
545 |     return "native no reliable";
546 |   }
547 | 
548 |   console.warn("WebRTC DataChannel is only available thought polyfill");
549 |   return "polyfill";
550 | }
551 | 
552 | exports.DCPF_install = DCPF_install;
553 | })(this);
554 | 


--------------------------------------------------------------------------------
/test/datachannel.js:
--------------------------------------------------------------------------------
  1 | /*! datachannel.js build:1.0.0-3, development. Copyright(c) 2013 Jesús Leganés Combarro "Piranna" <piranna@gmail.com> */
  2 | (function(exports){
  3 | /**
  4 |  * @author mrdoob / http://mrdoob.com/
  5 |  * @author Jesús Leganés Combarro "Piranna" <piranna@gmail.com>
  6 |  */
  7 | 
  8 | var EventTarget = function()
  9 | {
 10 | 	var listeners = {};
 11 | 
 12 | 	this.addEventListener = function(type, listener)
 13 | 	{
 14 | 		if(listeners[type] === undefined)
 15 | 			listeners[type] = [];
 16 | 
 17 | 		if(listeners[type].indexOf(listener) === -1)
 18 | 			listeners[type].push(listener);
 19 | 	};
 20 | 
 21 | 	this.dispatchEvent = function(event)
 22 | 	{
 23 | 		var listenerArray = (listeners[event.type] || []);
 24 | 
 25 | 		var dummyListener = this['on' + event.type];
 26 | 		if(typeof dummyListener == 'function')
 27 | 			listenerArray = listenerArray.concat(dummyListener);
 28 | 
 29 | 		for(var i=0, l=listenerArray.length; i<l; i++)
 30 | 			listenerArray[i].call(this, event);
 31 | 	};
 32 | 
 33 | 	this.removeEventListener = function(type, listener)
 34 | 	{
 35 | 		var index = listeners[type].indexOf(listener);
 36 | 
 37 | 		if(index !== -1)
 38 | 			listeners[type].splice(index, 1);
 39 | 	};
 40 | };
 41 | 
 42 | exports.EventTarget = EventTarget;/*! reliable.min.js build:0.1.0, production. 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 43 |  * DataChannel polyfill
 44 |  *
 45 |  * Web browser polyfill that implements the WebRTC DataChannel API over a
 46 |  * websocket. It implements the full latest DataChannel API specification
 47 |  * defined at 2013-01-16.
 48 |  *
 49 |  * Copyright (C) 2012-2013 Jesús Leganés Combarro "Piranna" <piranna@gmail.com>
 50 |  *
 51 |  * This code can be found at https://github.com/piranna/DataChannel-polyfill
 52 |  *
 53 |  *
 54 |  * This program is free software: you can redistribute it and/or modify it under
 55 |  * the terms of the GNU Affero General Public License as published by the Free
 56 |  * Software Foundation, either version 3 of the License, or (at your option) any
 57 |  * later version.
 58 |  *
 59 |  * This program is distributed in the hope that it will be useful, but WITHOUT
 60 |  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 61 |  * FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
 62 |  * details.
 63 |  *
 64 |  * You should have received a copy of the GNU Affero General Public License
 65 |  * along with this program. If not, see <http://www.gnu.org/licenses/>.
 66 |  */
 67 | 
 68 | 
 69 | /**
 70 |  * Install the polyfill
 71 |  * @param {String} ws_url URL to the backend server
 72 |  */
 73 | function DCPF_install(ws_url)
 74 | {
 75 |   // Fallbacks for vendor-specific variables until the spec is finalized.
 76 |   var RTCPeerConnection = window.RTCPeerConnection || window.webkitRTCPeerConnection || window.mozRTCPeerConnection;
 77 | 
 78 |   // Check if browser has support for WebRTC PeerConnection
 79 |   if(RTCPeerConnection == undefined)
 80 |   {
 81 |     console.error("Your browser doesn't support RTCPeerConnection, please use "+
 82 |                   "one of the latest versions of Chrome/Chromium or Firefox");
 83 |     return "old browser";
 84 |   }
 85 | 
 86 |   var createDataChannel;
 87 |   var supportReliable = false;
 88 | 
 89 |   //Holds the STUN server to use for PeerConnections.
 90 |   var SERVER = "stun:stun.l.google.com:19302";
 91 | 
 92 |   // Check if browser has support for native WebRTC DataChannel
 93 |   var pc = new RTCPeerConnection({iceServers: [{url: SERVER}]},
 94 |                                  {optional: [{RtpDataChannels: true}]})
 95 | 
 96 |   try
 97 |   {
 98 |     // Check native
 99 |     pc.createDataChannel('DCPF_install__checkSupport',{reliable:false}).close();
100 | 
101 |     // Native support available, store the function
102 |     createDataChannel = pc.createDataChannel
103 | 
104 |     // Check reliable
105 |     pc.createDataChannel('DCPF_install__checkSupport').close();
106 | 
107 |     // Native reliable support available
108 |     supportReliable = true
109 |   }
110 |   catch(e){}
111 |   finally
112 |   {
113 |     pc.close()
114 |   }
115 | 
116 | 
117 |   // DataChannel polyfill using WebSockets as 'underlying data transport'
118 |   function RTCDataChannel(label, dataChannelDict)
119 |   {
120 |     var self = this
121 | 
122 |     EventTarget.call(this)
123 | 
124 |     this.close = function()
125 |     {
126 |       if(this._udt)
127 |          this._udt.close()
128 |     }
129 |     this.send  = function(data)
130 |     {
131 |       if(this._udt)
132 |          this._udt.send(data)
133 |     }
134 | 
135 |     // binaryType
136 |     this.__defineGetter__("binaryType", function()
137 |     {
138 |       return self._udt.binaryType;
139 |     });
140 |     this.__defineSetter__("binaryType", function(binaryType)
141 |     {
142 |       self._udt.binaryType = binaryType;
143 |     });
144 | 
145 |     // bufferedAmount
146 |     this.__defineGetter__("bufferedAmount", function()
147 |     {
148 |       if(!self._udt)
149 |         return 0
150 | 
151 |       return self._udt.bufferedAmount;
152 |     });
153 | 
154 |     // label
155 |     this.__defineGetter__("label", function()
156 |     {
157 |       return label;
158 |     });
159 | 
160 |     // readyState
161 |     this.__defineGetter__("readyState", function()
162 |     {
163 |       if(!self._udt)
164 |         return "connecting"
165 | 
166 |       switch(self._udt.readyState)
167 |       {
168 |         case 0: return "connecting"
169 |         case 1: return "open"
170 |         case 2: return "closing"
171 |         case 3: return "closed"
172 |       }
173 |     });
174 | 
175 |     // id
176 |     var id = (dataChannelDict.id != undefined) ? dataChannelDict.id : 0
177 |     this.__defineGetter__("id", function()
178 |     {
179 |       return id;
180 |     });
181 | 
182 |     // maxRetransmitTime
183 |     var maxRetransmitTime = (dataChannelDict.maxRetransmitTime != undefined) ? dataChannelDict.maxRetransmitTime : null
184 |     this.__defineGetter__("maxRetransmitTime", function()
185 |     {
186 |       return maxRetransmitTime;
187 |     });
188 | 
189 |     // maxRetransmits
190 |     var maxRetransmits = (dataChannelDict.maxRetransmits != undefined) ? dataChannelDict.maxRetransmits : null
191 |     this.__defineGetter__("maxRetransmits", function()
192 |     {
193 |       return maxRetransmits;
194 |     });
195 | 
196 |     if(maxRetransmitTime && maxRetransmits)
197 |       throw SyntaxError
198 | 
199 |     var reliable = !(maxRetransmitTime || maxRetransmits)
200 | 
201 |     // negotiated
202 |     var negotiated = (dataChannelDict.negotiated != undefined) ? dataChannelDict.negotiated : false
203 |     this.__defineGetter__("negotiated", function()
204 |     {
205 |       return negotiated;
206 |     });
207 | 
208 |     // ordered
209 |     var ordered = (dataChannelDict.ordered != undefined) ? dataChannelDict.ordered : false
210 |     this.__defineGetter__("ordered", function()
211 |     {
212 |       return ordered;
213 |     });
214 | 
215 |     // protocol
216 |     var protocol = (dataChannelDict.protocol != undefined) ? dataChannelDict.protocol : ""
217 |     this.__defineGetter__("protocol", function()
218 |     {
219 |       return protocol;
220 |     });
221 |   }
222 | 
223 | 
224 |   function createUDT(pc, channel, onopen)
225 |   {
226 |     pc._channels = pc._channels || {}
227 |     pc._channels[channel.label] = channel
228 | 
229 |     if(!pc._peerId)
230 |     {
231 |       console.warn("No peer ID")
232 |       return
233 |     }
234 | 
235 |     console.info("Creating UDT")
236 | 
237 |     // Use a WebSocket as 'underlying data transport' to create the DataChannel
238 |     channel._udt = new WebSocket(ws_url)
239 |     channel._udt.addEventListener('close', function(event)
240 |     {
241 | //      if(error && channel.onerror)
242 | //      {
243 | //        channel.onerror(error)
244 | //        return
245 | //      }
246 | 
247 |       channel.dispatchEvent(event);
248 |     })
249 |     channel._udt.addEventListener('error', function(event)
250 |     {
251 |       channel.dispatchEvent(event);
252 |     })
253 |     channel._udt.addEventListener('open', function(event)
254 |     {
255 |       onopen(channel, pc)
256 |     })
257 |   }
258 | 
259 | 
260 |   // Public function to initiate the creation of a new DataChannel
261 |   if(createDataChannel && !supportReliable && Reliable)
262 |   {
263 |     RTCPeerConnection.prototype.createDataChannel = function(label, dataChannelDict)
264 |     {
265 |       dataChannelDict = dataChannelDict || {}
266 |       dataChannelDict.reliable = false
267 | 
268 |       var channel = new Reliable(createDataChannel.call(this, label, dataChannelDict))
269 |           channel.label = label
270 | 
271 |       return channel
272 |     }
273 | 
274 |     var dispatchEvent = RTCPeerConnection.prototype.dispatchEvent;
275 |     RTCPeerConnection.prototype.dispatchEvent = function(event)
276 |     {
277 |       var channel = event.channel;
278 | 
279 |       if(event.type == 'datachannel' && !(channel instanceof Reliable))
280 |       {
281 |         event.channel = new Reliable(channel)
282 |         event.channel.label = channel.label
283 |       }
284 | 
285 |       dispatchEvent.call(this, event)
286 |     };
287 |   }
288 | 
289 |   else
290 |     RTCPeerConnection.prototype.createDataChannel = function(label, dataChannelDict)
291 |     {
292 |       // Back-ward compatibility
293 |       if(this.readyState)
294 |          this.signalingState = this.readyState
295 |       // Back-ward compatibility
296 | 
297 |       if(this.signalingState == "closed")
298 |         throw INVALID_STATE;
299 | 
300 |       if(!label)
301 |         throw "'label' is not defined"
302 |       dataChannelDict = dataChannelDict || {}
303 | 
304 |       var channel = new RTCDataChannel(label, dataChannelDict)
305 | 
306 |       createUDT(this, channel, onopen)
307 | 
308 |       return channel
309 |     }
310 | 
311 | 
312 |   // Private function to 'catch' the 'ondatachannel' event
313 |   function ondatachannel(pc, socketId, label, dataChannelDict)
314 |   {
315 |     // Back-ward compatibility
316 |     if(pc.readyState)
317 |       pc.signalingState = pc.readyState
318 |     // Back-ward compatibility
319 | 
320 |     if(pc.signalingState == "closed")
321 |       return;
322 | 
323 |     var channel = new RTCDataChannel(label, dataChannelDict)
324 | 
325 |     createUDT(pc, channel, function(channel)
326 |     {
327 |       // Set channel as open
328 |       channel.send(JSON.stringify(["ready", socketId]))
329 | 
330 |       // Set onmessage event to bypass messages to user defined function
331 |       channel._udt.onmessage = function(event)
332 |       {
333 |         channel.dispatchEvent(event);
334 |       }
335 | 
336 |       // Set channel as open
337 |       var event = document.createEvent('Event')
338 |           event.initEvent('open', true, true)
339 | 
340 |       channel.dispatchEvent(event);
341 |     })
342 | 
343 |     var event = document.createEvent('Event')
344 |         event.initEvent('datachannel', true, true)
345 |         event.channel = channel
346 | 
347 |     pc.dispatchEvent(event);
348 |   }
349 | 
350 | 
351 |   function onopen(channel, pc)
352 |   {
353 |     // Wait until the other end of the channel is ready
354 |     channel._udt.onmessage = function(message)
355 |     {
356 |       var args = JSON.parse(message.data);
357 | 
358 |       var eventName = args[0]
359 | 
360 |       switch(eventName)
361 |       {
362 |         // Both peers support native DataChannels
363 |         case 'create.native':
364 |         {
365 |           // Close the ad-hoc signaling channel
366 |           if(pc._signaling)
367 |              pc._signaling.close();
368 | 
369 |           // Make native DataChannels to be created by default
370 |           pc.createDataChannel = createDataChannel
371 | 
372 |           // Start native DataChannel connection
373 |           channel._udt = pc.createDataChannel(channel.label, channel.reliable)
374 |         }
375 |         break
376 | 
377 |         // Connection through backend server is ready
378 |         case 'ready':
379 |         {
380 |           // Back-ward compatibility
381 |           if(pc.readyState)
382 |              pc.signalingState = pc.readyState
383 |           // Back-ward compatibility
384 | 
385 |           // PeerConnection is closed, do nothing
386 |           if(self.signalingState == "closed")
387 |             return;
388 | 
389 |           // Set onmessage event to bypass messages to user defined function
390 |           channel._udt.onmessage = function(event)
391 |           {
392 |             channel.dispatchEvent(event);
393 |           }
394 | 
395 |           // Set channel as open
396 |           var event = document.createEvent('Event')
397 |               event.initEvent('open', true, true)
398 | 
399 |           channel.dispatchEvent(event);
400 |         }
401 |         break
402 | 
403 |         default:
404 |           console.error("Unknown event '"+eventName+"'")
405 |       }
406 |     }
407 | 
408 |     // Query to the other peer to create a new DataChannel with us
409 |     channel.send(JSON.stringify(['create', pc._peerId, channel.label,
410 |                                  channel.reliable, Boolean(createDataChannel)]))
411 |   }
412 | 
413 | 
414 |   // Get the SDP session ID from a RTCSessionDescription object
415 |   function getId(description)
416 |   {
417 |     var pattern = /^o=.+/gm
418 |     var result = pattern.exec(description.sdp);
419 | 
420 |     return result[0].substring(2)
421 |   }
422 | 
423 |   // Overwrite setters to catch the session IDs
424 |   var setLocalDescription  = RTCPeerConnection.prototype.setLocalDescription
425 |   var setRemoteDescription = RTCPeerConnection.prototype.setRemoteDescription
426 |   var closeRTC = RTCPeerConnection.prototype.close;
427 | 
428 |   RTCPeerConnection.prototype.close = function()
429 |   {
430 |     if(this._signaling)
431 |        this._signaling.close();
432 | 
433 |     closeRTC.call(this);
434 |   };
435 | 
436 |   if(!createDataChannel)
437 |   RTCPeerConnection.prototype.setLocalDescription = function(description,
438 |                                                              successCallback,
439 |                                                              failureCallback)
440 |   {
441 |     var self = this
442 | 
443 |     // Create a signalling channel with a WebSocket on the proxy server with the
444 |     // defined ID and wait for new 'create' messages to create new DataChannels
445 |     if(this._signaling)
446 |        this._signaling.close();
447 | 
448 |     this._signaling = new WebSocket(ws_url)
449 |     this._signaling.onopen = function(event)
450 |     {
451 |       this.onmessage = function(event)
452 |       {
453 |         var args = JSON.parse(event.data)
454 | 
455 |         switch(args[0])
456 |         {
457 |           case 'create':
458 |             ondatachannel(self, args[1], args[2], {reliable: args[3]})
459 |             break
460 | 
461 |           // Both peers support native DataChannels
462 |           case 'create.native':
463 |             // Make native DataChannels to be created by default
464 |             self.createDataChannel = createDataChannel
465 |         }
466 |       }
467 | 
468 |       this.send(JSON.stringify(['setId', "pc."+getId(description),
469 |                                 Boolean(createDataChannel)]))
470 |     }
471 |     this._signaling.onerror = function(error)
472 |     {
473 |       console.error(error)
474 |     }
475 | 
476 |     setLocalDescription.call(this, description, successCallback, failureCallback)
477 |   }
478 | 
479 |   if(!createDataChannel)
480 |   RTCPeerConnection.prototype.setRemoteDescription = function(description,
481 |                                                               successCallback,
482 |                                                               failureCallback)
483 |   {
484 |     // Set the PeerConnection peer ID
485 |     this._peerId = "pc."+getId(description)
486 | 
487 |     // Initialize pending channels
488 |     for(var label in this._channels)
489 |     {
490 |       var channel = this._channels[label]
491 | 
492 |       if(channel._udt == undefined)
493 |         createUDT(this, channel, onopen)
494 |     }
495 | 
496 |     setRemoteDescription.call(this, description, successCallback, failureCallback)
497 |   }
498 | 
499 |   if(createDataChannel && !supportReliable && Reliable)
500 |   {
501 |     var createOffer  = RTCPeerConnection.prototype.createOffer;
502 |     var createAnswer = RTCPeerConnection.prototype.createAnswer;
503 | 
504 |     RTCPeerConnection.prototype.createOffer = function(successCallback,
505 |                                                        failureCallback,
506 |                                                        constraints)
507 |     {
508 |       createOffer.call(this, function(offer)
509 |       {
510 |         offer.sdp = Reliable.higherBandwidthSDP(offer.sdp);
511 |         successCallback(offer)
512 |       },
513 |       failureCallback, constraints)
514 |     }
515 | 
516 |     RTCPeerConnection.prototype.createAnswer = function(successCallback,
517 |                                                         failureCallback,
518 |                                                         constraints)
519 |     {
520 |       createAnswer.call(this, function(answer)
521 |       {
522 |         answer.sdp = Reliable.higherBandwidthSDP(answer.sdp);
523 |         successCallback(answer)
524 |       },
525 |       failureCallback, constraints)
526 |     }
527 |   }
528 | 
529 | 
530 | 
531 |   // Notify to the user if we have native DataChannels support or not
532 |   if(createDataChannel)
533 |   {
534 |     if(supportReliable)
535 |     {
536 |       console.log("Both native and polyfill WebRTC DataChannel are available");
537 |       return "native";
538 |     }
539 | 
540 |     if(Reliable)
541 |       console.warn("Native WebRTC DataChannel is not reliable, using polyfill instead");
542 |     else
543 |       console.error("Native WebRTC DataChannel is not reliable and not included polyfill");
544 | 
545 |     return "native no reliable";
546 |   }
547 | 
548 |   console.warn("WebRTC DataChannel is only available thought polyfill");
549 |   return "polyfill";
550 | }
551 | 
552 | exports.DCPF_install = DCPF_install;
553 | })(this);
554 | 


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