closes #2532

public/src/app.js

@@ -78,6 +78,7 @@ var socket,
 			var ioParams = {
 				reconnectionAttempts: config.maxReconnectionAttempts,
 				reconnectionDelay : config.reconnectionDelay,
+				transports: config.socketioTransports,
 				path: RELATIVE_PATH + '/socket.io'
 			};
 

src/controllers/api.js

@@ -13,6 +13,7 @@ var apiController = {};
 apiController.getConfig = function(req, res, next) {
 	var config = {};
 	config.relative_path = nconf.get('relative_path');
+	config.socketioTransports = nconf.get('socketioTransports') || ['websocket', 'polling'];
 	config.version = pkg.version;
 	config.siteTitle = meta.config.title || meta.config.browserTitle || 'NodeBB';
 	config.showSiteTitle = parseInt(meta.config.showSiteTitle, 10) === 1;

src/socket.io/index.js

@@ -36,7 +36,7 @@ Sockets.init = function(server) {
 	io.on('connection', onConnection);
 
 	io.listen(server, {
-		transports: ['websocket', 'polling']
+		transports: nconf.get('socketioTransports') || ['websocket', 'polling']
 	});
 
 	Sockets.server = io;