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