text: 'use strict';
  
  var inherits = require('inherits')
    , AjaxBasedTransport = require('./lib/ajax-based')
    , XdrStreamingTransport = require('./xdr-streaming')
    , XhrReceiver = require('./receiver/xhr')
    , XDRObject = require('./sender/xdr')
    ;
  
  function XdrPollingTransport(transUrl) {
    if (!XDRObject.enabled) {
      throw new Error('Transport created when disabled');
    }
    AjaxBasedTransport.call(this, transUrl, '/xhr', XhrReceiver, XDRObject);
  }
  
  inherits(XdrPollingTransport, AjaxBasedTransport);
  
  XdrPollingTransport.enabled = XdrStreamingTransport.enabled;
  XdrPollingTransport.transportName = 'xdr-polling';
  XdrPollingTransport.roundTrips = 2; // preflight, ajax
  
  module.exports = XdrPollingTransport;
  