Edit File: xhr-polling.js
'use strict'; var inherits = require('inherits') , AjaxBasedTransport = require('./lib/ajax-based') , XhrReceiver = require('./receiver/xhr') , XHRCorsObject = require('./sender/xhr-cors') , XHRLocalObject = require('./sender/xhr-local') ; function XhrPollingTransport(transUrl) { if (!XHRLocalObject.enabled && !XHRCorsObject.enabled) { throw new Error('Transport created when disabled'); } AjaxBasedTransport.call(this, transUrl, '/xhr', XhrReceiver, XHRCorsObject); } inherits(XhrPollingTransport, AjaxBasedTransport); XhrPollingTransport.enabled = function(info) { if (info.nullOrigin) { return false; } if (XHRLocalObject.enabled && info.sameOrigin) { return true; } return XHRCorsObject.enabled; }; XhrPollingTransport.transportName = 'xhr-polling'; XhrPollingTransport.roundTrips = 2; // preflight, ajax module.exports = XhrPollingTransport;
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