37 lines
509 B
JavaScript
37 lines
509 B
JavaScript
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/**
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* Module dependencies.
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*/
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var XHR = require('./polling-xhr');
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var JSONP = require('./polling-jsonp');
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/**
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* Export transports.
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*/
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module.exports = exports = {
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polling: polling,
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websocket: require('./websocket')
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};
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/**
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* Export upgrades map.
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*/
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exports.polling.upgradesTo = ['websocket'];
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/**
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* Polling polymorphic constructor.
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*
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* @api private
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*/
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function polling (req) {
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if ('string' === typeof req._query.j) {
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return new JSONP(req);
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} else {
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return new XHR(req);
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}
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}
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