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