aaac7fed
 liuqimichale
add
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'use strict';
var inherits = require('inherits')
, AjaxBasedTransport = require('./lib/ajax-based')
, XhrReceiver = require('./receiver/xhr')
, XDRObject = require('./sender/xdr')
;
// According to:
// http://stackoverflow.com/questions/1641507/detect-browser-support-for-cross-domain-xmlhttprequests
// http://hacks.mozilla.org/2009/07/cross-site-xmlhttprequest-with-cors/
function XdrStreamingTransport(transUrl) {
if (!XDRObject.enabled) {
throw new Error('Transport created when disabled');
}
AjaxBasedTransport.call(this, transUrl, '/xhr_streaming', XhrReceiver, XDRObject);
}
inherits(XdrStreamingTransport, AjaxBasedTransport);
XdrStreamingTransport.enabled = function(info) {
if (info.cookie_needed || info.nullOrigin) {
return false;
}
return XDRObject.enabled && info.sameScheme;
};
XdrStreamingTransport.transportName = 'xdr-streaming';
XdrStreamingTransport.roundTrips = 2; // preflight, ajax
module.exports = XdrStreamingTransport;
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