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'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;