Lazy loading of transports. Thanks @technoweenie

Fixed README transports list

README.md

@@ -119,7 +119,8 @@ Options:
 
 - *transports*
 
-		['websocket', 'server-events', 'flashsocket', 'htmlfile', 'xhr-multipart', 'xhr-polling']
+		['websocket', 'flashsocket', 'htmlfile', 'xhr-multipart', 'xhr-polling',
+    'jsonp-polling']
 		
 	A list of the accepted transports.
 

lib/socket.io/listener.js

@@ -4,14 +4,7 @@ var url = require('url')
   , options = require('./utils').options
   , Client = require('./client')
   , clientVersion = require('./../../support/socket.io-client/lib/io').io.version
-  , transports = {
-      'flashsocket': require('./transports/flashsocket')
-    , 'htmlfile': require('./transports/htmlfile')
-    , 'websocket': require('./transports/websocket')
-    , 'xhr-multipart': require('./transports/xhr-multipart')
-    , 'xhr-polling': require('./transports/xhr-polling')
-    , 'jsonp-polling': require('./transports/jsonp-polling')
-    };
+  , transports = {};
 
 var Listener = module.exports = function(server, options){
   process.EventEmitter.call(this);
@@ -21,7 +14,8 @@ var Listener = module.exports = function(server, options){
     origins: '*:*',
     resource: 'socket.io',
     flashPolicyServer: true,
-    transports: ['websocket', 'flashsocket', 'htmlfile', 'xhr-multipart', 'xhr-polling', 'jsonp-polling'],
+    transports: ['websocket', 'flashsocket', 'htmlfile', 'xhr-multipart',
+                 'xhr-polling', 'jsonp-polling'],
     transportOptions: {},
     log: util.log
   }, options);
@@ -49,9 +43,12 @@ var Listener = module.exports = function(server, options){
     }
   });
 
-  for (var i in transports)
-    if ('init' in transports[i]) transports[i].init(this);
-
+  this.options.transports.forEach(function(name) {
+    if (!(name in transports))
+      transports[name] = require('./transports/' + name);
+    if ('init' in transports[name]) transports[name].init(self);
+  });
+
   this.options.log('socket.io ready - accepting connections');
 };