support different ports for websocket and http

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);