title: how xmpp use http binding to push message to client
body: <p>According to wiki <a href="http://en.wikipedia.org/wiki/Extensible_Messaging_and_Presence_Protocol" rel="nofollow">http://en.wikipedia.org/wiki/Extensible_Messaging_and_Presence_Protocol</a> , xmpp is using http binding (rather an http pooling) to push message to client. </p>
  
  <p>Can anybody explain to me how it works?</p>