docs/source/jsonp.html

   1 <html>
   2 <head>
   3   <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
   4   <title>The source code</title>
   5     <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
   6     <script type="text/javascript" src="../resources/prettify/prettify.js"></script>
   7 </head>
   8 <body  onload="prettyPrint();">
   9     <pre class="prettyprint lang-js">/*!
  10  * Ext JS Library 3.2.1
  11  * Copyright(c) 2006-2010 Ext JS, Inc.
  12  * licensing@extjs.com
  13  * http://www.extjs.com/license
  14  */
  15 Ext.ns('Ext.ux');
  16
  17 Ext.ux.JSONP = (function(){
  18     var _queue = [],
  19         _current = null,
  20         _nextRequest = function() {
  21             _current = null;
  22             if(_queue.length) {
  23                 _current = _queue.shift();
  24                         _current.script.src = _current.url + '?' + _current.params;
  25                         document.getElementsByTagName('head')[0].appendChild(_current.script);
  26             }
  27         };
  28
  29     return {
  30         request: function(url, o) {
  31             if(!url) {
  32                 return;
  33             }
  34             var me = this;
  35
  36             o.params = o.params || {};
  37             if(o.callbackKey) {
  38                 o.params[o.callbackKey] = 'Ext.ux.JSONP.callback';
  39             }
  40             var params = Ext.urlEncode(o.params);
  41
  42             var script = document.createElement('script');
  43                         script.type = 'text/javascript';
  44
  45             if(o.isRawJSON) {
  46                 if(Ext.isIE) {
  47                     Ext.fly(script).on('readystatechange', function() {
  48                         if(script.readyState == 'complete') {
  49                             var data = script.innerHTML;
  50                             if(data.length) {
  51                                 me.callback(Ext.decode(data));
  52                             }
  53                         }
  54                     });
  55                 }
  56                 else {
  57                      Ext.fly(script).on('load', function() {
  58                         var data = script.innerHTML;
  59                         if(data.length) {
  60                             me.callback(Ext.decode(data));
  61                         }
  62                     });
  63                 }
  64             }
  65
  66             _queue.push({
  67                 url: url,
  68                 script: script,
  69                 callback: o.callback || function(){},
  70                 scope: o.scope || window,
  71                 params: params || null
  72             });
  73
  74             if(!_current) {
  75                 _nextRequest();
  76             }
  77         },
  78
  79         callback: function(json) {
  80             _current.callback.apply(_current.scope, [json]);
  81             Ext.fly(_current.script).removeAllListeners();
  82             document.getElementsByTagName('head')[0].removeChild(_current.script);
  83             _nextRequest();
  84         }
  85     }
  86 })();</pre>
  87 </body>
  88 </html>