1 | /* |
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2 | * Ext JS Library 2.2.1 |
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3 | * Copyright(c) 2006-2009, Ext JS, LLC. |
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4 | * licensing@extjs.com |
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5 | * |
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6 | * http://extjs.com/license |
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7 | */ |
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8 | |
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9 | /** |
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10 | * @class Ext.data.Connection |
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11 | * @extends Ext.util.Observable |
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12 | * <p>The class encapsulates a connection to the page's originating domain, allowing requests to be made |
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13 | * either to a configured URL, or to a URL specified at request time.</p> |
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14 | * <p>Requests made by this class are asynchronous, and will return immediately. No data from |
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15 | * the server will be available to the statement immediately following the {@link #request} call. |
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16 | * To process returned data, use a |
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17 | * <a href="#request-option-success" ext:member="request-option-success" ext:cls="Ext.data.Connection">success callback</a> |
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18 | * in the request options object, |
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19 | * or an {@link #requestcomplete event listener}.</p> |
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20 | * <p><h3>File Uploads</h3><a href="#request-option-isUpload" ext:member="request-option-isUpload" ext:cls="Ext.data.Connection">File uploads</a> are not performed using normal "Ajax" techniques, that |
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21 | * is they are <b>not</b> performed using XMLHttpRequests. Instead the form is submitted in the standard |
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22 | * manner with the DOM <tt><form></tt> element temporarily modified to have its |
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23 | * <a href="http://www.w3.org/TR/REC-html40/present/frames.html#adef-target">target</a> set to refer |
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24 | * to a dynamically generated, hidden <tt><iframe></tt> which is inserted into the document |
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25 | * but removed after the return data has been gathered.</p> |
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26 | * <p>The server response is parsed by the browser to create the document for the IFRAME. If the |
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27 | * server is using JSON to send the return object, then the |
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28 | * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17">Content-Type</a> header |
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29 | * must be set to "text/html" in order to tell the browser to insert the text unchanged into the document body.</p> |
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30 | * <p>Characters which are significant to an HTML parser must be sent as HTML entities, so encode |
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31 | * "<" as "&lt;", "&" as "&amp;" etc.</p> |
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32 | * <p>The response text is retrieved from the document, and a fake XMLHttpRequest object |
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33 | * is created containing a <tt>responseText</tt> property in order to conform to the |
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34 | * requirements of event handlers and callbacks.</p> |
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35 | * <p>Be aware that file upload packets are sent with the content type <a href="http://www.faqs.org/rfcs/rfc2388.html">multipart/form</a> |
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36 | * and some server technologies (notably JEE) may require some custom processing in order to |
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37 | * retrieve parameter names and parameter values from the packet content.</p> |
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38 | * @constructor |
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39 | * @param {Object} config a configuration object. |
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40 | */ |
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41 | Ext.data.Connection = function(config){ |
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42 | Ext.apply(this, config); |
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43 | this.addEvents( |
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44 | /** |
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45 | * @event beforerequest |
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46 | * Fires before a network request is made to retrieve a data object. |
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47 | * @param {Connection} conn This Connection object. |
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48 | * @param {Object} options The options config object passed to the {@link #request} method. |
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49 | */ |
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50 | "beforerequest", |
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51 | /** |
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52 | * @event requestcomplete |
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53 | * Fires if the request was successfully completed. |
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54 | * @param {Connection} conn This Connection object. |
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55 | * @param {Object} response The XHR object containing the response data. |
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56 | * See <a href="http://www.w3.org/TR/XMLHttpRequest/">The XMLHttpRequest Object</a> |
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57 | * for details. |
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58 | * @param {Object} options The options config object passed to the {@link #request} method. |
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59 | */ |
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60 | "requestcomplete", |
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61 | /** |
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62 | * @event requestexception |
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63 | * Fires if an error HTTP status was returned from the server. |
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64 | * See <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html">HTTP Status Code Definitions</a> |
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65 | * for details of HTTP status codes. |
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66 | * @param {Connection} conn This Connection object. |
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67 | * @param {Object} response The XHR object containing the response data. |
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68 | * See <a href="http://www.w3.org/TR/XMLHttpRequest/">The XMLHttpRequest Object</a> |
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69 | * for details. |
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70 | * @param {Object} options The options config object passed to the {@link #request} method. |
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71 | */ |
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72 | "requestexception" |
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73 | ); |
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74 | Ext.data.Connection.superclass.constructor.call(this); |
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75 | }; |
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76 | |
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77 | Ext.extend(Ext.data.Connection, Ext.util.Observable, { |
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78 | /** |
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79 | * @cfg {String} url (Optional) The default URL to be used for requests to the server. (defaults to undefined) |
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80 | */ |
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81 | /** |
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82 | * @cfg {Object} extraParams (Optional) An object containing properties which are used as |
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83 | * extra parameters to each request made by this object. (defaults to undefined) |
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84 | */ |
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85 | /** |
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86 | * @cfg {Object} defaultHeaders (Optional) An object containing request headers which are added |
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87 | * to each request made by this object. (defaults to undefined) |
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88 | */ |
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89 | /** |
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90 | * @cfg {String} method (Optional) The default HTTP method to be used for requests. |
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91 | * (defaults to undefined; if not set, but {@link #request} params are present, POST will be used; |
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92 | * otherwise, GET will be used.) |
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93 | */ |
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94 | /** |
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95 | * @cfg {Number} timeout (Optional) The timeout in milliseconds to be used for requests. (defaults to 30000) |
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96 | */ |
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97 | timeout : 30000, |
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98 | /** |
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99 | * @cfg {Boolean} autoAbort (Optional) Whether this request should abort any pending requests. (defaults to false) |
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100 | * @type Boolean |
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101 | */ |
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102 | autoAbort:false, |
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103 | |
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104 | /** |
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105 | * @cfg {Boolean} disableCaching (Optional) True to add a unique cache-buster param to GET requests. (defaults to true) |
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106 | * @type Boolean |
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107 | */ |
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108 | disableCaching: true, |
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109 | |
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110 | /** |
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111 | * @cfg {String} disableCachingParam (Optional) Change the parameter which is sent went disabling caching |
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112 | * through a cache buster. Defaults to '_dc' |
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113 | * @type String |
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114 | */ |
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115 | disableCachingParam: '_dc', |
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116 | |
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117 | |
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118 | /** |
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119 | * <p>Sends an HTTP request to a remote server.</p> |
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120 | * <p><b>Important:</b> Ajax server requests are asynchronous, and this call will |
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121 | * return before the response has been received. Process any returned data |
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122 | * in a callback function.</p> |
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123 | * <p>To execute a callback function in the correct scope, use the <tt>scope</tt> option.</p> |
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124 | * @param {Object} options An object which may contain the following properties:<ul> |
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125 | * <li><b>url</b> : String/Function (Optional)<div class="sub-desc">The URL to |
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126 | * which to send the request, or a function to call which returns a URL string. The scope of the |
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127 | * function is specified by the <tt>scope</tt> option. Defaults to configured URL.</div></li> |
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128 | * <li><b>params</b> : Object/String/Function (Optional)<div class="sub-desc"> |
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129 | * An object containing properties which are used as parameters to the |
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130 | * request, a url encoded string or a function to call to get either. The scope of the function |
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131 | * is specified by the <tt>scope</tt> option.</div></li> |
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132 | * <li><b>method</b> : String (Optional)<div class="sub-desc">The HTTP method to use |
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133 | * for the request. Defaults to the configured method, or if no method was configured, |
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134 | * "GET" if no parameters are being sent, and "POST" if parameters are being sent. Note that |
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135 | * the method name is case-sensitive and should be all caps.</div></li> |
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136 | * <li><b>callback</b> : Function (Optional)<div class="sub-desc">The |
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137 | * function to be called upon receipt of the HTTP response. The callback is |
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138 | * called regardless of success or failure and is passed the following |
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139 | * parameters:<ul> |
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140 | * <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li> |
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141 | * <li><b>success</b> : Boolean<div class="sub-desc">True if the request succeeded.</div></li> |
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142 | * <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data. |
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143 | * See <a href="http://www.w3.org/TR/XMLHttpRequest/">http://www.w3.org/TR/XMLHttpRequest/</a> for details about |
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144 | * accessing elements of the response.</div></li> |
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145 | * </ul></div></li> |
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146 | * <li><a id="request-option-success"></a><b>success</b> : Function (Optional)<div class="sub-desc">The function |
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147 | * to be called upon success of the request. The callback is passed the following |
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148 | * parameters:<ul> |
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149 | * <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.</div></li> |
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150 | * <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li> |
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151 | * </ul></div></li> |
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152 | * <li><b>failure</b> : Function (Optional)<div class="sub-desc">The function |
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153 | * to be called upon failure of the request. The callback is passed the |
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154 | * following parameters:<ul> |
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155 | * <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.</div></li> |
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156 | * <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li> |
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157 | * </ul></div></li> |
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158 | * <li><b>scope</b> : Object (Optional)<div class="sub-desc">The scope in |
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159 | * which to execute the callbacks: The "this" object for the callback function. If the <tt>url</tt>, or <tt>params</tt> options were |
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160 | * specified as functions from which to draw values, then this also serves as the scope for those function calls. |
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161 | * Defaults to the browser window.</div></li> |
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162 | * <li><b>form</b> : Element/HTMLElement/String (Optional)<div class="sub-desc">The <tt><form></tt> |
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163 | * Element or the id of the <tt><form></tt> to pull parameters from.</div></li> |
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164 | * <li><a id="request-option-isUpload"></a><b>isUpload</b> : Boolean (Optional)<div class="sub-desc"><b>Only meaningful when used |
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165 | * with the <tt>form</tt> option.</b> |
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166 | * <p>True if the form object is a file upload (will be set automatically if the form was |
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167 | * configured with <b><tt>enctype</tt></b> "multipart/form-data").</p> |
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168 | * <p>File uploads are not performed using normal "Ajax" techniques, that is they are <b>not</b> |
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169 | * performed using XMLHttpRequests. Instead the form is submitted in the standard manner with the |
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170 | * DOM <tt><form></tt> element temporarily modified to have its |
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171 | * <a href="http://www.w3.org/TR/REC-html40/present/frames.html#adef-target">target</a> set to refer |
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172 | * to a dynamically generated, hidden <tt><iframe></tt> which is inserted into the document |
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173 | * but removed after the return data has been gathered.</p> |
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174 | * <p>The server response is parsed by the browser to create the document for the IFRAME. If the |
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175 | * server is using JSON to send the return object, then the |
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176 | * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17">Content-Type</a> header |
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177 | * must be set to "text/html" in order to tell the browser to insert the text unchanged into the document body.</p> |
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178 | * <p>The response text is retrieved from the document, and a fake XMLHttpRequest object |
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179 | * is created containing a <tt>responseText</tt> property in order to conform to the |
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180 | * requirements of event handlers and callbacks.</p> |
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181 | * <p>Be aware that file upload packets are sent with the content type <a href="http://www.faqs.org/rfcs/rfc2388.html">multipart/form</a> |
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182 | * and some server technologies (notably JEE) may require some custom processing in order to |
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183 | * retrieve parameter names and parameter values from the packet content.</p> |
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184 | * </div></li> |
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185 | * <li><b>headers</b> : Object (Optional)<div class="sub-desc">Request |
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186 | * headers to set for the request.</div></li> |
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187 | * <li><b>xmlData</b> : Object (Optional)<div class="sub-desc">XML document |
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188 | * to use for the post. Note: This will be used instead of params for the post |
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189 | * data. Any params will be appended to the URL.</div></li> |
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190 | * <li><b>jsonData</b> : Object/String (Optional)<div class="sub-desc">JSON |
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191 | * data to use as the post. Note: This will be used instead of params for the post |
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192 | * data. Any params will be appended to the URL.</div></li> |
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193 | * <li><b>disableCaching</b> : Boolean (Optional)<div class="sub-desc">True |
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194 | * to add a unique cache-buster param to GET requests.</div></li> |
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195 | * </ul></p> |
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196 | * <p>The options object may also contain any other property which might be needed to perform |
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197 | * postprocessing in a callback because it is passed to callback functions.</p> |
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198 | * @return {Number} transactionId The id of the server transaction. This may be used |
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199 | * to cancel the request. |
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200 | */ |
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201 | request : function(o){ |
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202 | if(this.fireEvent("beforerequest", this, o) !== false){ |
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203 | var p = o.params; |
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204 | |
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205 | if(typeof p == "function"){ |
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206 | p = p.call(o.scope||window, o); |
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207 | } |
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208 | if(typeof p == "object"){ |
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209 | p = Ext.urlEncode(p); |
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210 | } |
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211 | if(this.extraParams){ |
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212 | var extras = Ext.urlEncode(this.extraParams); |
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213 | p = p ? (p + '&' + extras) : extras; |
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214 | } |
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215 | |
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216 | var url = o.url || this.url; |
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217 | if(typeof url == 'function'){ |
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218 | url = url.call(o.scope||window, o); |
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219 | } |
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220 | |
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221 | if(o.form){ |
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222 | var form = Ext.getDom(o.form); |
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223 | url = url || form.action; |
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224 | |
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225 | var enctype = form.getAttribute("enctype"); |
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226 | if(o.isUpload || (enctype && enctype.toLowerCase() == 'multipart/form-data')){ |
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227 | return this.doFormUpload(o, p, url); |
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228 | } |
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229 | var f = Ext.lib.Ajax.serializeForm(form); |
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230 | p = p ? (p + '&' + f) : f; |
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231 | } |
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232 | |
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233 | var hs = o.headers; |
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234 | if(this.defaultHeaders){ |
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235 | hs = Ext.apply(hs || {}, this.defaultHeaders); |
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236 | if(!o.headers){ |
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237 | o.headers = hs; |
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238 | } |
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239 | } |
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240 | |
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241 | var cb = { |
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242 | success: this.handleResponse, |
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243 | failure: this.handleFailure, |
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244 | scope: this, |
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245 | argument: {options: o}, |
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246 | timeout : o.timeout || this.timeout |
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247 | }; |
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248 | |
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249 | var method = o.method||this.method||((p || o.xmlData || o.jsonData) ? "POST" : "GET"); |
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250 | |
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251 | if(method == 'GET' && (this.disableCaching && o.disableCaching !== false) || o.disableCaching === true){ |
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252 | var dcp = o.disableCachingParam || this.disableCachingParam; |
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253 | url += (url.indexOf('?') != -1 ? '&' : '?') + dcp + '=' + (new Date().getTime()); |
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254 | } |
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255 | |
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256 | if(typeof o.autoAbort == 'boolean'){ // options gets top priority |
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257 | if(o.autoAbort){ |
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258 | this.abort(); |
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259 | } |
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260 | }else if(this.autoAbort !== false){ |
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261 | this.abort(); |
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262 | } |
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263 | if((method == 'GET' || o.xmlData || o.jsonData) && p){ |
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264 | url += (url.indexOf('?') != -1 ? '&' : '?') + p; |
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265 | p = ''; |
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266 | } |
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267 | this.transId = Ext.lib.Ajax.request(method, url, cb, p, o); |
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268 | return this.transId; |
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269 | }else{ |
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270 | Ext.callback(o.callback, o.scope, [o, null, null]); |
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271 | return null; |
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272 | } |
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273 | }, |
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274 | |
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275 | /** |
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276 | * Determine whether this object has a request outstanding. |
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277 | * @param {Number} transactionId (Optional) defaults to the last transaction |
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278 | * @return {Boolean} True if there is an outstanding request. |
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279 | */ |
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280 | isLoading : function(transId){ |
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281 | if(transId){ |
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282 | return Ext.lib.Ajax.isCallInProgress(transId); |
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283 | }else{ |
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284 | return this.transId ? true : false; |
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285 | } |
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286 | }, |
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287 | |
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288 | /** |
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289 | * Aborts any outstanding request. |
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290 | * @param {Number} transactionId (Optional) defaults to the last transaction |
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291 | */ |
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292 | abort : function(transId){ |
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293 | if(transId || this.isLoading()){ |
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294 | Ext.lib.Ajax.abort(transId || this.transId); |
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295 | } |
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296 | }, |
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297 | |
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298 | // private |
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299 | handleResponse : function(response){ |
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300 | this.transId = false; |
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301 | var options = response.argument.options; |
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302 | response.argument = options ? options.argument : null; |
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303 | this.fireEvent("requestcomplete", this, response, options); |
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304 | Ext.callback(options.success, options.scope, [response, options]); |
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305 | Ext.callback(options.callback, options.scope, [options, true, response]); |
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306 | }, |
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307 | |
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308 | // private |
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309 | handleFailure : function(response, e){ |
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310 | this.transId = false; |
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311 | var options = response.argument.options; |
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312 | response.argument = options ? options.argument : null; |
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313 | this.fireEvent("requestexception", this, response, options, e); |
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314 | Ext.callback(options.failure, options.scope, [response, options]); |
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315 | Ext.callback(options.callback, options.scope, [options, false, response]); |
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316 | }, |
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317 | |
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318 | // private |
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319 | doFormUpload : function(o, ps, url){ |
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320 | var id = Ext.id(); |
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321 | var frame = document.createElement('iframe'); |
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322 | frame.id = id; |
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323 | frame.name = id; |
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324 | frame.className = 'x-hidden'; |
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325 | if(Ext.isIE){ |
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326 | frame.src = Ext.SSL_SECURE_URL; |
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327 | } |
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328 | document.body.appendChild(frame); |
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329 | |
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330 | if(Ext.isIE){ |
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331 | document.frames[id].name = id; |
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332 | } |
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333 | |
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334 | var form = Ext.getDom(o.form); |
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335 | form.target = id; |
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336 | form.method = 'POST'; |
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337 | form.enctype = form.encoding = 'multipart/form-data'; |
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338 | if(url){ |
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339 | form.action = url; |
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340 | } |
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341 | |
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342 | var hiddens, hd; |
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343 | if(ps){ // add dynamic params |
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344 | hiddens = []; |
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345 | ps = Ext.urlDecode(ps, false); |
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346 | for(var k in ps){ |
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347 | if(ps.hasOwnProperty(k)){ |
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348 | hd = document.createElement('input'); |
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349 | hd.type = 'hidden'; |
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350 | hd.name = k; |
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351 | hd.value = ps[k]; |
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352 | form.appendChild(hd); |
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353 | hiddens.push(hd); |
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354 | } |
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355 | } |
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356 | } |
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357 | |
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358 | function cb(){ |
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359 | var r = { // bogus response object |
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360 | responseText : '', |
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361 | responseXML : null |
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362 | }; |
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363 | |
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364 | r.argument = o ? o.argument : null; |
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365 | |
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366 | try { // |
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367 | var doc; |
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368 | if(Ext.isIE){ |
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369 | doc = frame.contentWindow.document; |
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370 | }else { |
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371 | doc = (frame.contentDocument || window.frames[id].document); |
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372 | } |
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373 | if(doc && doc.body){ |
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374 | r.responseText = doc.body.innerHTML; |
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375 | } |
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376 | if(doc && doc.XMLDocument){ |
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377 | r.responseXML = doc.XMLDocument; |
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378 | }else { |
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379 | r.responseXML = doc; |
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380 | } |
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381 | } |
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382 | catch(e) { |
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383 | // ignore |
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384 | } |
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385 | |
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386 | Ext.EventManager.removeListener(frame, 'load', cb, this); |
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387 | |
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388 | this.fireEvent("requestcomplete", this, r, o); |
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389 | |
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390 | Ext.callback(o.success, o.scope, [r, o]); |
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391 | Ext.callback(o.callback, o.scope, [o, true, r]); |
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392 | |
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393 | setTimeout(function(){Ext.removeNode(frame);}, 100); |
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394 | } |
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395 | |
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396 | Ext.EventManager.on(frame, 'load', cb, this); |
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397 | form.submit(); |
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398 | |
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399 | if(hiddens){ // remove dynamic params |
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400 | for(var i = 0, len = hiddens.length; i < len; i++){ |
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401 | Ext.removeNode(hiddens[i]); |
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402 | } |
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403 | } |
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404 | } |
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405 | }); |
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406 | |
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407 | /** |
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408 | * @class Ext.Ajax |
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409 | * @extends Ext.data.Connection |
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410 | * Global Ajax request class. Provides a simple way to make Ajax requests with maximum flexibility. Example usage: |
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411 | * <pre><code> |
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412 | // Basic request |
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413 | Ext.Ajax.request({ |
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414 | url: 'foo.php', |
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415 | success: someFn, |
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416 | failure: otherFn, |
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417 | headers: { |
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418 | 'my-header': 'foo' |
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419 | }, |
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420 | params: { foo: 'bar' } |
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421 | }); |
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422 | |
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423 | // Simple ajax form submission |
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424 | Ext.Ajax.request({ |
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425 | form: 'some-form', |
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426 | params: 'foo=bar' |
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427 | }); |
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428 | |
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429 | // Default headers to pass in every request |
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430 | Ext.Ajax.defaultHeaders = { |
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431 | 'Powered-By': 'Ext' |
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432 | }; |
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433 | |
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434 | // Global Ajax events can be handled on every request! |
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435 | Ext.Ajax.on('beforerequest', this.showSpinner, this); |
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436 | </code></pre> |
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437 | * @singleton |
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438 | */ |
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439 | Ext.Ajax = new Ext.data.Connection({ |
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440 | /** |
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441 | * @cfg {String} url @hide |
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442 | */ |
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443 | /** |
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444 | * @cfg {Object} extraParams @hide |
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445 | */ |
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446 | /** |
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447 | * @cfg {Object} defaultHeaders @hide |
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448 | */ |
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449 | /** |
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450 | * @cfg {String} method (Optional) @hide |
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451 | */ |
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452 | /** |
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453 | * @cfg {Number} timeout (Optional) @hide |
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454 | */ |
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455 | /** |
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456 | * @cfg {Boolean} autoAbort (Optional) @hide |
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457 | */ |
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458 | |
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459 | /** |
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460 | * @cfg {Boolean} disableCaching (Optional) @hide |
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461 | */ |
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462 | |
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463 | /** |
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464 | * @property disableCaching |
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465 | * True to add a unique cache-buster param to GET requests. (defaults to true) |
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466 | * @type Boolean |
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467 | */ |
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468 | /** |
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469 | * @property url |
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470 | * The default URL to be used for requests to the server. (defaults to undefined) |
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471 | * @type String |
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472 | */ |
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473 | /** |
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474 | * @property extraParams |
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475 | * An object containing properties which are used as |
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476 | * extra parameters to each request made by this object. (defaults to undefined) |
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477 | * @type Object |
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478 | */ |
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479 | /** |
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480 | * @property defaultHeaders |
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481 | * An object containing request headers which are added to each request made by this object. (defaults to undefined) |
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482 | * @type Object |
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483 | */ |
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484 | /** |
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485 | * @property method |
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486 | * The default HTTP method to be used for requests. Note that this is case-sensitive and should be all caps (defaults |
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487 | * to undefined; if not set but parms are present will use "POST," otherwise "GET.") |
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488 | * @type String |
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489 | */ |
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490 | /** |
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491 | * @property timeout |
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492 | * The timeout in milliseconds to be used for requests. (defaults to 30000) |
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493 | * @type Number |
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494 | */ |
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495 | |
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496 | /** |
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497 | * @property autoAbort |
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498 | * Whether a new request should abort any pending requests. (defaults to false) |
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499 | * @type Boolean |
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500 | */ |
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501 | autoAbort : false, |
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502 | |
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503 | /** |
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504 | * Serialize the passed form into a url encoded string |
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505 | * @param {String/HTMLElement} form |
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506 | * @return {String} |
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507 | */ |
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508 | serializeForm : function(form){ |
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509 | return Ext.lib.Ajax.serializeForm(form); |
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510 | } |
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511 | }); |
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