aaac7fed
 liuqimichale
add
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'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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