feature(socket) main -> tryRequire

lib/server/socket.js

@@ -1,9 +1,8 @@
 (function() {
     'use strict';
     
-    var main            = global.cloudcmd.main,
-        DIR             = '../',
-        io              = main.require('socket.io'),
+    var DIR             = '../',
+        io              = tryRequire('socket.io'),
         Util            = require(DIR + 'util'),
         AllListeners    = [];
     
@@ -53,4 +52,15 @@
         
         return io;
     }
+    
+    function tryRequire(name) {
+        var module;
+        
+        Util.exec.try(function() {
+            module = require(name);
+        });
+        
+        return module;
+    }
+})();
 })();