utils.js

// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

(function() {

window.buildbot = window.buildbot || {};

buildbot.requestURL =
    function(url, responseType, callback, opt_errorStatusCallback) {
  var xhr = new XMLHttpRequest();
  if (responseType == "json")
    // WebKit doesn't handle xhr.responseType = "json" as of Chrome 25.
    xhr.responseType = "text";
  else
    xhr.responseType = responseType;

  xhr.onreadystatechange = function(state) {
    if (xhr.readyState == 4) {
      if (xhr.status == 200) {
        var response =
          responseType == "json" ? JSON.parse(xhr.response) : xhr.response;
        callback(response);
      } else {
        if (opt_errorStatusCallback)
          opt_errorStatusCallback(xhr.status);
      }
    }
  };

  xhr.onerror = function(error) {
    console.log("xhr error:", error);
  };

  xhr.open("GET", url, true);
  xhr.send();
};

})();