text: /**
   * Requests the given webservice that will create the connection and will return
   * the necessary details(rid, sid and jid) to attach to this connection and
   * start using it. This script can be used for optimizing the connection startup
   * time. The function will send AJAX request to a webservice that should
   * create the bosh session much faster than the client because the webservice
   * can be started on the same machine as the XMPP serever.
   *
   * NOTE: It's vert important to execute this function as early as you can for
   * optimal results.
   *
   * @param webserviceUrl the url for the web service that is going to create the
   * connection.
   * @param successCallback callback function called with the result of the AJAX
   * request if the request was successfull. The callback will receive one
   * parameter which will be JS Object with properties - rid, sid and jid. This
   * result should be passed to JitsiConnection.attach method in order to use that
   * connection.
   * @param error_callback callback function called the AJAX request fail. This
   * callback is going to receive one parameter which is going to be JS error
   * object with a reason for failure in it.
   */
  function createConnectionExternally( // eslint-disable-line no-unused-vars
  webserviceUrl, successCallback, error_callback) {
    if (!window.XMLHttpRequest) {
      error_callback(new Error('XMLHttpRequest is not supported!'));
      return;
    }
  
    var HTTP_STATUS_OK = 200;
    var xhttp = new XMLHttpRequest();
  
    xhttp.onreadystatechange = function () {
      if (xhttp.readyState == xhttp.DONE) {
        var now = window.connectionTimes['external_connect.done'] = window.performance.now();
        console.log('(TIME) external connect XHR done:\t', now);
  
        if (xhttp.status == HTTP_STATUS_OK) {
          try {
            var data = JSON.parse(xhttp.responseText);
            successCallback(data);
          } catch (e) {
            error_callback(e);
          }
        } else {
          error_callback(new Error('XMLHttpRequest error. Status: ' + xhttp.status + '. Error message: ' + xhttp.statusText));
        }
      }
    };
  
    xhttp.open('GET', webserviceUrl, true); // Fixes external connect for IE
    // The timeout property may be set only after calling the open() method
    // and before calling the send() method.
  
    xhttp.timeout = 3000;
    window.connectionTimes = {};
    var now = window.connectionTimes['external_connect.sending'] = window.performance.now();
    console.log('(TIME) Sending external connect XHR:\t', now);
    xhttp.send();
  }