github.com/insionng/yougam@v0.0.0-20170714101924-2bc18d833463/themes/wind/static/libs/sockjs-client-1.1.0/lib/transport/xdr-polling.js (about)

     1  'use strict';
     2  
     3  var inherits = require('inherits')
     4    , AjaxBasedTransport = require('./lib/ajax-based')
     5    , XdrStreamingTransport = require('./xdr-streaming')
     6    , XhrReceiver = require('./receiver/xhr')
     7    , XDRObject = require('./sender/xdr')
     8    ;
     9  
    10  function XdrPollingTransport(transUrl) {
    11    if (!XDRObject.enabled) {
    12      throw new Error('Transport created when disabled');
    13    }
    14    AjaxBasedTransport.call(this, transUrl, '/xhr', XhrReceiver, XDRObject);
    15  }
    16  
    17  inherits(XdrPollingTransport, AjaxBasedTransport);
    18  
    19  XdrPollingTransport.enabled = XdrStreamingTransport.enabled;
    20  XdrPollingTransport.transportName = 'xdr-polling';
    21  XdrPollingTransport.roundTrips = 2; // preflight, ajax
    22  
    23  module.exports = XdrPollingTransport;