include/javascript/tiny_mce/classes/util/XHR.js

   1 /**
   2  * XHR.js
   3  *
   4  * Copyright 2009, Moxiecode Systems AB
   5  * Released under LGPL License.
   6  *
   7  * License: http://tinymce.moxiecode.com/license
   8  * Contributing: http://tinymce.moxiecode.com/contributing
   9  */
  10
  11 /**
  12  * This class enables you to send XMLHTTPRequests cross browser.
  13  * @class tinymce.util.XHR
  14  * @static
  15  * @example
  16  * // Sends a low level Ajax request
  17  * tinymce.util.XHR.send({
  18  *    url : 'someurl',
  19  *    success : function(text) {
  20  *       console.debug(text);
  21  *    }
  22  * });
  23  */
  24 tinymce.create('static tinymce.util.XHR', {
  25         /**
  26          * Sends a XMLHTTPRequest.
  27          * Consult the Wiki for details on what settings this method takes.
  28          *
  29          * @method send
  30          * @param {Object} o Object will target URL, callbacks and other info needed to make the request.
  31          */
  32         send : function(o) {
  33                 var x, t, w = window, c = 0;
  34
  35                 // Default settings
  36                 o.scope = o.scope || this;
  37                 o.success_scope = o.success_scope || o.scope;
  38                 o.error_scope = o.error_scope || o.scope;
  39                 o.async = o.async === false ? false : true;
  40                 o.data = o.data || '';
  41
  42                 function get(s) {
  43                         x = 0;
  44
  45                         try {
  46                                 x = new ActiveXObject(s);
  47                         } catch (ex) {
  48                         }
  49
  50                         return x;
  51                 };
  52
  53                 x = w.XMLHttpRequest ? new XMLHttpRequest() : get('Microsoft.XMLHTTP') || get('Msxml2.XMLHTTP');
  54
  55                 if (x) {
  56                         if (x.overrideMimeType)
  57                                 x.overrideMimeType(o.content_type);
  58
  59                         x.open(o.type || (o.data ? 'POST' : 'GET'), o.url, o.async);
  60
  61                         if (o.content_type)
  62                                 x.setRequestHeader('Content-Type', o.content_type);
  63
  64                         x.setRequestHeader('X-Requested-With', 'XMLHttpRequest');
  65
  66                         x.send(o.data);
  67
  68                         function ready() {
  69                                 if (!o.async || x.readyState == 4 || c++ > 10000) {
  70                                         if (o.success && c < 10000 && x.status == 200)
  71                                                 o.success.call(o.success_scope, '' + x.responseText, x, o);
  72                                         else if (o.error)
  73                                                 o.error.call(o.error_scope, c > 10000 ? 'TIMED_OUT' : 'GENERAL', x, o);
  74
  75                                         x = null;
  76                                 } else
  77                                         w.setTimeout(ready, 10);
  78                         };
  79
  80                         // Syncronous request
  81                         if (!o.async)
  82                                 return ready();
  83
  84                         // Wait for response, onReadyStateChange can not be used since it leaks memory in IE
  85                         t = w.setTimeout(ready, 10);
  86                 }
  87         }
  88 });