title: Get error when i try to test Multi-Room Chat Application sample code
body: <p>i found <a href="https://github.com/uditalias/chat-nodejs" rel="nofollow noreferrer">this sample code from github</a> as <code>chat-nodejs</code> named and i want to test it how is it work, after installing <code>socket.io</code> and <code>expressjs</code> and running server and click to connect to server i get this error on <code>firebug</code>:</p>
  
  <pre><code>GET https://apis.google.com/_/scs/apps-static/_/js/k=...TcCOZ5yY8jtGvNKVwrKHFFcvb9eCe_w/cb=gapi.loaded_1
  
  GET http://localhost/socket.io/?EIO=3&amp;transport=polling&amp;t=LbtPp7S
  
  
  "NetworkError:404 Not Found - 
         http://localhost/socket.io/?EIO=3&amp;transport=polling&amp;t=LbtPp7S"?EIO=3&amp;...LbtPp7S
  
  Cross-Origin Request Blocked: 
  The Same Origin Policy disallows reading the remote resource at 
  http://localhost/socket.io/?EIO=3&amp;transport=polling&amp;t=LbtPp7S. 
  (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).
  </code></pre>