pusher-js/src/runtimes/web/transports/transports.ts

Pusher Channels JavaScript library for browsers, React Native, NodeJS and web workers

import {
  default as Transports,
  streamingConfiguration,
  pollingConfiguration,
} from 'isomorphic/transports/transports';
import Transport from 'core/transports/transport';
import TransportHooks from 'core/transports/transport_hooks';
import * as URLSchemes from 'core/transports/url_schemes';
import Runtime from 'runtime';
import { Dependencies } from '../dom/dependencies';
import * as Collections from 'core/utils/collections';

var SockJSTransport = new Transport(<TransportHooks>{
  file: 'sockjs',
  urls: URLSchemes.sockjs,
  handlesActivityChecks: true,
  supportsPing: false,

  isSupported: function () {
    return true;
  },
  isInitialized: function () {
    return window.SockJS !== undefined;
  },
  getSocket: function (url, options) {
    return new window.SockJS(url, null, {
      js_path: Dependencies.getPath('sockjs', {
        useTLS: options.useTLS,
      }),
      ignore_null_origin: options.ignoreNullOrigin,
    });
  },
  beforeOpen: function (socket, path) {
    socket.send(
      JSON.stringify({
        path: path,
      }),
    );
  },
});

var xdrConfiguration = {
  isSupported: function (environment): boolean {
    var yes = Runtime.isXDRSupported(environment.useTLS);
    return yes;
  },
};

/** HTTP streaming transport using XDomainRequest (IE 8,9). */
var XDRStreamingTransport = new Transport(
  <TransportHooks>(
    Collections.extend({}, streamingConfiguration, xdrConfiguration)
  ),
);

/** HTTP long-polling transport using XDomainRequest (IE 8,9). */
var XDRPollingTransport = new Transport(
  <TransportHooks>(
    Collections.extend({}, pollingConfiguration, xdrConfiguration)
  ),
);

Transports.xdr_streaming = XDRStreamingTransport;
Transports.xdr_polling = XDRPollingTransport;
Transports.sockjs = SockJSTransport;

export default Transports;