Rename webapp_it2me to remoting_webapp and move it from webapp/me2mom to webapp/

remoting/webapp/me2mom/xhr.js

-// Copyright (c) 2011 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.
-
-/**
- * @fileoverview
- * Simple utilities for making XHRs more pleasant.
- */
-
-'use strict';
-
-/** @suppress {duplicate} */
-var remoting = remoting || {};
-
-/** Namespace for XHR functions */
-/** @type {Object} */
-remoting.xhr = remoting.xhr || {};
-
-/**
- * Takes an associative array of parameters and urlencodes it.
- *
- * @param {Object.<string>} paramHash The parameter key/value pairs.
- * @return {string} URLEncoded version of paramHash.
- */
-remoting.xhr.urlencodeParamHash = function(paramHash) {
-  var paramArray = [];
-  for (var key in paramHash) {
-    paramArray.push(encodeURIComponent(key) +
-                     '=' + encodeURIComponent(paramHash[key]));
-  }
-  if (paramArray.length > 0) {
-    return paramArray.join('&');
-  }
-  return '';
-};
-
-/**
- * Execute an XHR GET asynchronously.
- *
- * @param {string} url The base URL to GET, excluding parameters.
- * @param {function(XMLHttpRequest):void} onDone The function to call on
- *     completion.
- * @param {(string|Object.<string>)=} opt_parameters The request parameters,
- *     either as an associative array, or a string.  If it is a string, do
- *     not include the ? and be sure it is correctly URLEncoded.
- * @param {Object.<string>=} opt_headers Additional headers to include on the
- *     request.
- * @param {boolean=} opt_withCredentials Set the withCredentials flags in the
- *     XHR.
- * @return {XMLHttpRequest} The request object.
- */
-remoting.xhr.get = function(url, onDone, opt_parameters, opt_headers,
-                            opt_withCredentials) {
-  return remoting.xhr.doMethod('GET', url, onDone, opt_parameters,
-                               opt_headers, opt_withCredentials);
-};
-
-/**
- * Execute an XHR POST asynchronously.
- *
- * @param {string} url The base URL to POST, excluding parameters.
- * @param {function(XMLHttpRequest):void} onDone The function to call on
- *     completion.
- * @param {(string|Object.<string>)=} opt_parameters The request parameters,
- *     either as an associative array, or a string.  If it is a string, be
- *     sure it is correctly URLEncoded.
- * @param {Object.<string>=} opt_headers Additional headers to include on the
- *     request.
- * @param {boolean=} opt_withCredentials Set the withCredentials flags in the
- *     XHR.
- * @return {XMLHttpRequest} The request object.
- */
-remoting.xhr.post = function(url, onDone, opt_parameters, opt_headers,
-                             opt_withCredentials) {
-  return remoting.xhr.doMethod('POST', url, onDone, opt_parameters,
-                               opt_headers, opt_withCredentials);
-};
-
-/**
- * Execute an XHR DELETE asynchronously.
- *
- * @param {string} url The base URL to DELETE, excluding parameters.
- * @param {function(XMLHttpRequest):void} onDone The function to call on
- *     completion.
- * @param {(string|Object.<string>)=} opt_parameters The request parameters,
- *     either as an associative array, or a string.  If it is a string, be
- *     sure it is correctly URLEncoded.
- * @param {Object.<string>=} opt_headers Additional headers to include on the
- *     request.
- * @param {boolean=} opt_withCredentials Set the withCredentials flags in the
- *     XHR.
- * @return {XMLHttpRequest} The request object.
- */
-remoting.xhr.remove = function(url, onDone, opt_parameters, opt_headers,
-                             opt_withCredentials) {
-  return remoting.xhr.doMethod('DELETE', url, onDone, opt_parameters,
-                               opt_headers, opt_withCredentials);
-};
-
-/**
- * Execute an XHR PUT asynchronously.
- *
- * @param {string} url The base URL to PUT, excluding parameters.
- * @param {function(XMLHttpRequest):void} onDone The function to call on
- *     completion.
- * @param {(string|Object.<string>)=} opt_parameters The request parameters,
- *     either as an associative array, or a string.  If it is a string, be
- *     sure it is correctly URLEncoded.
- * @param {Object.<string>=} opt_headers Additional headers to include on the
- *     request.
- * @param {boolean=} opt_withCredentials Set the withCredentials flags in the
- *     XHR.
- * @return {XMLHttpRequest} The request object.
- */
-remoting.xhr.put = function(url, onDone, opt_parameters, opt_headers,
-                             opt_withCredentials) {
-  return remoting.xhr.doMethod('PUT', url, onDone, opt_parameters,
-                               opt_headers, opt_withCredentials);
-};
-
-/**
- * Execute an arbitrary HTTP method asynchronously.
- *
- * @param {string} methodName The HTTP method name, e.g. "GET", "POST" etc.
- * @param {string} url The base URL, excluding parameters.
- * @param {function(XMLHttpRequest):void} onDone The function to call on
- *     completion.
- * @param {(string|Object.<string>)=} opt_parameters The request parameters,
- *     either as an associative array, or a string.  If it is a string, be
- *     sure it is correctly URLEncoded.
- * @param {Object.<string>=} opt_headers Additional headers to include on the
- *     request.
- * @param {boolean=} opt_withCredentials Set the withCredentials flags in the
- *     XHR.
- * @return {XMLHttpRequest} The XMLHttpRequest object.
- */
-remoting.xhr.doMethod = function(methodName, url, onDone,
-                                 opt_parameters, opt_headers,
-                                 opt_withCredentials) {
-  /** @type {XMLHttpRequest} */
-  var xhr = new XMLHttpRequest();
-  xhr.onreadystatechange = function() {
-    if (xhr.readyState != 4) {
-      return;
-    }
-    onDone(xhr);
-  };
-
-  var parameterString = '';
-  if (typeof(opt_parameters) === 'string') {
-    parameterString = opt_parameters;
-  } else if (typeof(opt_parameters) === 'object') {
-    parameterString = remoting.xhr.urlencodeParamHash(opt_parameters);
-  } else if (opt_parameters === undefined) {
-    // No problem here. Do nothing.
-  } else {
-    throw 'opt_parameters must be string or associated array.';
-  }
-
-  var useBody = (methodName == 'POST') || (methodName == 'PUT');
-
-  if (!useBody && parameterString != '') {
-    url = url + '?' + parameterString;
-  }
-
-  xhr.open(methodName, url, true);
-  if (methodName == 'POST') {
-    xhr.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
-  }
-  // Add in request headers.
-  if (typeof(opt_headers) === 'object') {
-    for (var key in opt_headers) {
-      xhr.setRequestHeader(key, opt_headers[key]);
-    }
-  } else if (opt_headers === undefined) {
-    // No problem here. Do nothing.
-  } else {
-    throw 'opt_headers must be associative array.';
-  }
-
-  if (opt_withCredentials) {
-    xhr.withCredentials = true;
-  }
-
-  xhr.send(useBody ? parameterString : null);
-  return xhr;
-};