support different ports for websocket and http

config.js.dist

@@ -1,5 +1,6 @@
 module.exports = {
     httpPort: 3000,
+    websocketPort: 3001,
     mongoUri: "mongodb://demo_user:demo_password@ds027769.mongolab.com:27769/demo_database",
     mongoCollectionName: 'cryptpad'
 };

server.js

@@ -5,15 +5,29 @@ var ChainPadSrv = require('./ChainPadSrv');
 var Storage = require('./Storage');
 
 var config = require('./config');
+config.websocketPort = config.websocketPort || config.httpPort;
 
 var app = Express();
 app.use(Express.static(__dirname + '/www'));
 
+app.get('/api/config', function(req, res){
+    var host = req.headers.host.replace(/\:[0-9]+/, '');
+    res.setHeader('Content-Type', 'text/javascript');
+    res.send('define(' + JSON.stringify({
+        websocketURL:'ws://' + host + ':' + config.websocketPort + '/cryptpad_websocket'
+    }) + ');');
+});
+
 var httpServer = Http.createServer(app);
 httpServer.listen(config.httpPort);
 console.log('listening on port ' + config.httpPort);
 
-var wsSrv = new WebSocketServer({server: httpServer});
+var wsConfig = { server: httpServer };
+if (config.websocketPort !== config.httpPort) {
+    wsConfig = { port: config.websocketPort };
+}
+
+var wsSrv = new WebSocketServer(wsConfig);
 Storage.create(config, function (store) {
     console.log('DB connected');
     ChainPadSrv.create(wsSrv, store);

www/main.js

@@ -1,9 +1,10 @@
 define([
+    'api/config?cb=' + Math.random().toString(16).substring(2),
     'realtime-wysiwyg',
     'bower/jquery/dist/jquery.min',
     'bower/ckeditor/ckeditor',
-    'bower/tweetnacl/nacl-fast.min'
-], function (RTWysiwyg) {
+    'bower/tweetnacl/nacl-fast.min',
+], function (Config, RTWysiwyg) {
     var Ckeditor = window.CKEDITOR;
     var Nacl = window.nacl;
     var $ = jQuery;
@@ -56,7 +57,7 @@ define([
             ifr.contentDocument.body.innerHTML = INITIAL_STATE;
 
             var rtw =
-                RTWysiwyg.start(window.location.href.replace(/#.*$/, '').replace(/^http/, 'ws'),
+                RTWysiwyg.start(Config.websocketURL,
                                 userName(),
                                 {},
                                 Nacl.util.encodeBase64(key.lookupKey).substring(0,10),