def IqHandler(self,conn,stanza):
        """ Handles streams state change. Used internally. """
        typ=stanza.getType()
        self.DEBUG('IqHandler called typ->%s'%typ,'info')
        if typ=='set' and stanza.getTag('open',namespace=NS_IBB): self.StreamOpenHandler(conn,stanza)
        elif typ=='set' and stanza.getTag('close',namespace=NS_IBB): self.StreamCloseHandler(conn,stanza)
        elif typ=='result': self.StreamCommitHandler(conn,stanza)
        elif typ=='error': self.StreamOpenReplyHandler(conn,stanza)
        else: conn.send(Error(stanza,ERR_BAD_REQUEST))
        raise NodeProcessed
 Handles streams state change. Used internally. 
chrome-cordova/gcmServer/xmpp/filetransfer.py