Add way to specify transport-specific options using transportOptions hash.

Fixes #272

Author: brycekahle

lib/main.js

@@ -48,6 +48,7 @@ function SockJS(url, protocols, options) {
     log.warn("'protocols_whitelist' is DEPRECATED. Use 'transports' instead.");
   }
   this._transportsWhitelist = options.transports;
+  this._transportOptions = options.transportOptions || {};
 
   var sessionId = options.sessionId || 8;
   if (typeof sessionId === 'function') {
@@ -213,8 +214,9 @@ SockJS.prototype._connect = function() {
     debug('using timeout', timeoutMs);
 
     var transportUrl = urlUtils.addPath(this._transUrl, '/' + this._server + '/' + this._generateSessionId());
+    var options = this._transportOptions[Transport.transportName];
     debug('transport url', transportUrl);
-    var transportObj = new Transport(transportUrl, this._transUrl);
+    var transportObj = new Transport(transportUrl, this._transUrl, options);
     transportObj.on('message', this._transportMessage.bind(this));
     transportObj.once('close', this._transportClose.bind(this));
     transportObj.transportName = Transport.transportName;

lib/transport/websocket.js

@@ -12,7 +12,7 @@ if (process.env.NODE_ENV !== 'production') {
   debug = require('debug')('sockjs-client:websocket');
 }
 
-function WebSocketTransport(transUrl) {
+function WebSocketTransport(transUrl, ignore, options) {
   if (!WebSocketTransport.enabled()) {
     throw new Error('Transport created when disabled');
   }
@@ -29,7 +29,7 @@ function WebSocketTransport(transUrl) {
   }
   this.url = url;
 
-  this.ws = new WebsocketDriver(this.url);
+  this.ws = new WebsocketDriver(this.url, undefined, options);
   this.ws.onmessage = function(e) {
     debug('message event', e.data);
     self.emit('message', e.data);