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