1 <div class="body-wrap" xmlns:ext="http://www.extjs.com"><div class="top-tools"><a class="inner-link" href="#Ext.data.Connection-props"><img src="../resources/images/default/s.gif" class="item-icon icon-prop">Properties</a> <a class="inner-link" href="#Ext.data.Connection-methods"><img src="../resources/images/default/s.gif" class="item-icon icon-method">Methods</a> <a class="inner-link" href="#Ext.data.Connection-events"><img src="../resources/images/default/s.gif" class="item-icon icon-event">Events</a> <a class="inner-link" href="#Ext.data.Connection-configs"><img src="../resources/images/default/s.gif" class="item-icon icon-config">Config Options</a> <a class="bookmark" href="../docs/?class=Ext.data.Connection"><img src="../resources/images/default/s.gif" class="item-icon icon-fav">Direct Link</a> </div><div class="inheritance res-block"><pre class="res-block-inner"><a href="output/Ext.util.Observable.html" ext:member="" ext:cls="Ext.util.Observable">Observable</a> <img src="resources/elbow-end.gif">Connection</pre></div><h1>Class <a href="source/Connection.html#cls-Ext.data.Connection">Ext.data.Connection</a></h1><table cellspacing="0"><tr><td class="label">Package:</td><td class="hd-info">Ext.data</td></tr><tr><td class="label">Defined In:</td><td class="hd-info"><a href="source/Connection.html#cls-Ext.data.Connection">Connection.js</a></td></tr><tr><td class="label">Class:</td><td class="hd-info"><a href="source/Connection.html#cls-Ext.data.Connection">Connection</a></td></tr><tr><td class="label">Subclasses:</td><td class="hd-info"><a href="output/Ext.Ajax.html" ext:cls="Ext.Ajax">Ajax</a></td></tr><tr><td class="label">Extends:</td><td class="hd-info"><a href="output/Ext.util.Observable.html" ext:cls="Ext.util.Observable" ext:member="">Observable</a></td></tr></table><div class="description"><p>The class encapsulates a connection to the page's originating domain, allowing requests to be made
2 either to a configured URL, or to a URL specified at request time.</p>
3 <p>Requests made by this class are asynchronous, and will return immediately. No data from
4 the server will be available to the statement immediately following the <a href="output/Ext.data.Connection.html#Ext.data.Connection-request" ext:member="request" ext:cls="Ext.data.Connection">request</a> call.
5 To process returned data, use a
6 <a href="#request-option-success" ext:member="request-option-success" ext:cls="Ext.data.Connection">success callback</a>
7 in the request options object,
8 or an <a href="output/Ext.data.Connection.html#Ext.data.Connection-requestcomplete" ext:member="requestcomplete" ext:cls="Ext.data.Connection">event listener</a>.</p>
9 <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
10 is they are <b>not</b> performed using XMLHttpRequests. Instead the form is submitted in the standard
11 manner with the DOM <tt><form></tt> element temporarily modified to have its
12 <a href="http://www.w3.org/TR/REC-html40/present/frames.html#adef-target">target</a> set to refer
13 to a dynamically generated, hidden <tt><iframe></tt> which is inserted into the document
14 but removed after the return data has been gathered.</p>
15 <p>The server response is parsed by the browser to create the document for the IFRAME. If the
16 server is using JSON to send the return object, then the
17 <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17">Content-Type</a> header
18 must be set to "text/html" in order to tell the browser to insert the text unchanged into the document body.</p>
19 <p>Characters which are significant to an HTML parser must be sent as HTML entities, so encode
20 "<" as "&lt;", "&" as "&amp;" etc.</p>
21 <p>The response text is retrieved from the document, and a fake XMLHttpRequest object
22 is created containing a <tt>responseText</tt> property in order to conform to the
23 requirements of event handlers and callbacks.</p>
24 <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>
25 and some server technologies (notably JEE) may require some custom processing in order to
26 retrieve parameter names and parameter values from the packet content.</p></div><div class="hr"></div><a id="Ext.data.Connection-configs"></a><h2>Config Options</h2><table cellspacing="0" class="member-table"><tbody><tr><th colspan="2" class="sig-header">Config Options</th><th class="msource-header">Defined By</th></tr><tr class="config-row "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-autoAbort"></a><b><a href="source/Connection.html#cfg-Ext.data.Connection-autoAbort">autoAbort</a></b> : Boolean<div class="mdesc">Whether this request should abort any pending requests. (defaults to false)</div></td><td class="msource">Connection</td></tr><tr class="config-row "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-defaultHeaders"></a><b><a href="source/Connection.html#cfg-Ext.data.Connection-defaultHeaders">defaultHeaders</a></b> : Object<div class="mdesc">An object containing request headers which are added
27 to each request made by this object. (defaults to undefined)</div></td><td class="msource">Connection</td></tr><tr class="config-row "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-disableCaching"></a><b><a href="source/Connection.html#cfg-Ext.data.Connection-disableCaching">disableCaching</a></b> : Boolean<div class="mdesc">True to add a unique cache-buster param to GET requests. (defaults to true)</div></td><td class="msource">Connection</td></tr><tr class="config-row "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-disableCachingParam"></a><b><a href="source/Connection.html#cfg-Ext.data.Connection-disableCachingParam">disableCachingParam</a></b> : String<div class="mdesc">Change the parameter which is sent went disabling caching
28 through a cache buster. Defaults to '_dc'</div></td><td class="msource">Connection</td></tr><tr class="config-row expandable "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-extraParams"></a><b><a href="source/Connection.html#cfg-Ext.data.Connection-extraParams">extraParams</a></b> : Object<div class="mdesc"><div class="short">An object containing properties which are used as
29 extra parameters to each request made by this object. (defaults to ...</div><div class="long">An object containing properties which are used as
30 extra parameters to each request made by this object. (defaults to undefined)</div></div></td><td class="msource">Connection</td></tr><tr class="config-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-listeners"></a><b><a href="source/Observable.html#cfg-Ext.util.Observable-listeners">listeners</a></b> : Object<div class="mdesc"><div class="short">A config object containing one or more event handlers to be added to this
31 object during initialization. This should ...</div><div class="long"><p>A config object containing one or more event handlers to be added to this
32 object during initialization. This should be a valid listeners config object as specified in the
33 <a href="output/Ext.util.Observable.html#Ext.util.Observable-addListener" ext:member="addListener" ext:cls="Ext.util.Observable">addListener</a> example for attaching multiple handlers at once.</p>
34 <br><p><b><u>DOM events from ExtJs <a href="output/Ext.Component.html" ext:cls="Ext.Component">Components</a></u></b></p>
35 <br><p>While <i>some</i> ExtJs Component classes export selected DOM events (e.g. "click", "mouseover" etc), this
36 is usually only done when extra value can be added. For example the <a href="output/Ext.DataView.html" ext:cls="Ext.DataView">DataView</a>'s
37 <b><code><a href="output/Ext.DataView.html#Ext.DataView-click" ext:member="click" ext:cls="Ext.DataView">click</a></code></b> event passing the node clicked on. To access DOM
38 events directly from a Component's HTMLElement, listeners must be added to the <i><a href="output/Ext.Component.html#Ext.Component-getEl" ext:member="getEl" ext:cls="Ext.Component">Element</a></i> after the Component
39 has been rendered. A plugin can simplify this step:<pre><code><i>// Plugin is configured <b>with</b> a listeners config object.</i>
40 <i>// The Component is appended to the argument list of all handler functions.</i>
41 Ext.DomObserver = Ext.extend(Object, {
42 constructor: <b>function</b>(config) {
43 this.listeners = config.listeners ? config.listeners : config;
46 <i>// Component passes itself into plugin's init method</i>
47 init: <b>function</b>(c) {
48 <b>var</b> p, l = this.listeners;
49 <b>for</b> (p <b>in</b> l) {
50 <b>if</b> (Ext.isFunction(l[p])) {
51 l[p] = this.createHandler(l[p], c);
53 l[p].fn = this.createHandler(l[p].fn, c);
57 <i>// Add the listeners to the Element immediately following the render call</i>
58 c.render = c.render.<a href="output/Function.html#Function-createSequence" ext:member="createSequence" ext:cls="Function">createSequence</a>(<b>function</b>() {
59 <b>var</b> e = c.getEl();
66 createHandler: <b>function</b>(fn, c) {
67 <b>return</b> <b>function</b>(e) {
73 <b>var</b> combo = <b>new</b> Ext.form.ComboBox({
75 <i>// Collapse combo when its element is clicked on</i>
76 plugins: [ <b>new</b> Ext.DomObserver({
77 click: <b>function</b>(evt, comp) {
83 mode: <em>'local'</em>,
84 triggerAction: <em>'all'</em>
85 });</code></pre></p></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#listeners" ext:member="#listeners" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="config-row expandable "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-method"></a><b><a href="source/Connection.html#cfg-Ext.data.Connection-method">method</a></b> : String<div class="mdesc"><div class="short">The default HTTP method to be used for requests.
86 (defaults to undefined; if not set, but request params are present, ...</div><div class="long">The default HTTP method to be used for requests.
87 (defaults to undefined; if not set, but <a href="output/Ext.data.Connection.html#Ext.data.Connection-request" ext:member="request" ext:cls="Ext.data.Connection">request</a> params are present, POST will be used;
88 otherwise, GET will be used.)</div></div></td><td class="msource">Connection</td></tr><tr class="config-row "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-timeout"></a><b><a href="source/Connection.html#cfg-Ext.data.Connection-timeout">timeout</a></b> : Number<div class="mdesc">The timeout in milliseconds to be used for requests. (defaults to 30000)</div></td><td class="msource">Connection</td></tr><tr class="config-row expandable "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-url"></a><b><a href="source/Connection.html#cfg-Ext.data.Connection-url">url</a></b> : String<div class="mdesc"><div class="short">The default URL to be used for requests to the server. Defaults to undefined.
89 The url config may be a function which ...</div><div class="long"><p>The default URL to be used for requests to the server. Defaults to undefined.</p>
90 <p>The <code>url</code> config may be a function which <i>returns</i> the URL to use for the Ajax request. The scope
91 (<code><b>this</b></code> reference) of the function is the <code>scope</code> option passed to the <a href="output/Ext.data.Connection.html#Ext.data.Connection-request" ext:member="request" ext:cls="Ext.data.Connection">request</a> method.</p></div></div></td><td class="msource">Connection</td></tr></tbody></table><a id="Ext.data.Connection-props"></a><h2>Public Properties</h2><div class="no-members">This class has no public properties.</div><a id="Ext.data.Connection-methods"></a><h2>Public Methods</h2><table cellspacing="0" class="member-table"><tbody><tr><th colspan="2" class="sig-header">Method</th><th class="msource-header">Defined By</th></tr><tr class="method-row expandable"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-Connection"></a><b><a href="source/Connection.html#cls-Ext.data.Connection">Connection</a></b>( <code>Object config</code> )
92 <div class="mdesc"><div class="short"></div><div class="long"><div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>config</code> : Object<div class="sub-desc">a configuration object.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource">Connection</td></tr><tr class="method-row expandable "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-abort"></a><b><a href="source/Connection.html#method-Ext.data.Connection-abort">abort</a></b>( <span title="Optional" class="optional">[<code>Number transactionId</code>]</span> )
94 void<div class="mdesc"><div class="short">Aborts any outstanding request.</div><div class="long">Aborts any outstanding request.<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>transactionId</code> : Number<div class="sub-desc">(Optional) defaults to the last transaction</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource">Connection</td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-addEvents"></a><b><a href="source/Observable.html#method-Ext.util.Observable-addEvents">addEvents</a></b>( <code>Object|String o</code>, <code>string Optional.</code> )
96 void<div class="mdesc"><div class="short">Adds the specified events to the list of events which this Observable may fire.</div><div class="long">Adds the specified events to the list of events which this Observable may fire.<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>o</code> : Object|String<div class="sub-desc">Either an object with event names as properties with a value of <code>true</code>
97 or the first event name string if multiple event names are being passed as separate parameters.</div></li><li><code>Optional.</code> : string<div class="sub-desc">Event name if multiple event names are being passed as separate parameters.
98 Usage:<pre><code>this.addEvents(<em>'storeloaded'</em>, <em>'storecleared'</em>);</code></pre></div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#addEvents" ext:member="#addEvents" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-addListener"></a><b><a href="source/Observable.html#method-Ext.util.Observable-addListener">addListener</a></b>( <code>String eventName</code>, <code>Function handler</code>, <span title="Optional" class="optional">[<code>Object scope</code>]</span>, <span title="Optional" class="optional">[<code>Object options</code>]</span> )
100 void<div class="mdesc"><div class="short">Appends an event handler to this object.</div><div class="long">Appends an event handler to this object.<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>eventName</code> : String<div class="sub-desc">The name of the event to listen for.</div></li><li><code>handler</code> : Function<div class="sub-desc">The method the event invokes.</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (<code><b>this</b></code> reference) in which the handler function is executed.
101 <b>If omitted, defaults to the object which fired the event.</b></div></li><li><code>options</code> : Object<div class="sub-desc">(optional) An object containing handler configuration.
102 properties. This may contain any of the following properties:<ul>
103 <li><b>scope</b> : Object<div class="sub-desc">The scope (<code><b>this</b></code> reference) in which the handler function is executed.
104 <b>If omitted, defaults to the object which fired the event.</b></div></li>
105 <li><b>delay</b> : Number<div class="sub-desc">The number of milliseconds to delay the invocation of the handler after the event fires.</div></li>
106 <li><b>single</b> : Boolean<div class="sub-desc">True to add a handler to handle just the next firing of the event, and then remove itself.</div></li>
107 <li><b>buffer</b> : Number<div class="sub-desc">Causes the handler to be scheduled to run in an <a href="output/Ext.util.DelayedTask.html" ext:cls="Ext.util.DelayedTask">Ext.util.DelayedTask</a> delayed
108 by the specified number of milliseconds. If the event fires again within that time, the original
109 handler is <em>not</em> invoked, but the new handler is scheduled in its place.</div></li>
110 <li><b>target</b> : Observable<div class="sub-desc">Only call the handler if the event was fired on the target Observable, <i>not</i>
111 if the event was bubbled up from a child Observable.</div></li>
114 <b>Combining Options</b><br>
115 Using the options argument, it is possible to combine different types of listeners:<br>
117 A delayed, one-time listener.
118 <pre><code>myDataView.on(<em>'click'</em>, this.onClick, this, {
123 <b>Attaching multiple handlers in 1 call</b><br>
124 The method also allows for a single argument to be passed which is a config object containing properties
125 which specify multiple handlers.
127 <pre><code>myGridPanel.on({
133 <em>'mouseover'</em> : {
134 fn: this.onMouseOver,
137 <em>'mouseout'</em> : {
143 Or a shorthand syntax:<br>
144 <pre><code>myGridPanel.on({
145 <em>'click'</em> : this.onClick,
146 <em>'mouseover'</em> : this.onMouseOver,
147 <em>'mouseout'</em> : this.onMouseOut,
149 });</code></pre></div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#addListener" ext:member="#addListener" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-enableBubble"></a><b><a href="source/Observable-more.html#method-Ext.util.Observable-enableBubble">enableBubble</a></b>( <code>String/Array events</code> )
151 void<div class="mdesc"><div class="short">Enables events fired by this Observable to bubble up an owner hierarchy by calling
152 this.getBubbleTarget() if present....</div><div class="long"><p>Enables events fired by this Observable to bubble up an owner hierarchy by calling
153 <code>this.getBubbleTarget()</code> if present. There is no implementation in the Observable base class.</p>
154 <p>This is commonly used by Ext.Components to bubble events to owner Containers. See <a href="output/Ext.Component.getBubbleTarget.html" ext:cls="Ext.Component.getBubbleTarget">Ext.Component.getBubbleTarget</a>. The default
155 implementation in Ext.Component returns the Component's immediate owner. But if a known target is required, this can be overridden to
156 access the required target more quickly.</p>
157 <p>Example:</p><pre><code>Ext.override(Ext.form.Field, {
158 <i>// Add functionality to Field's initComponent to enable the change event to bubble</i>
159 initComponent : Ext.form.Field.prototype.initComponent.createSequence(<b>function</b>() {
160 this.enableBubble(<em>'change'</em>);
163 <i>// We know that we want Field's events to bubble directly to the FormPanel.</i>
164 getBubbleTarget : <b>function</b>() {
165 <b>if</b> (!this.formPanel) {
166 this.formPanel = this.findParentByType(<em>'form'</em>);
168 <b>return</b> this.formPanel;
172 <b>var</b> myForm = <b>new</b> Ext.formPanel({
173 title: <em>'User Details'</em>,
178 change: <b>function</b>() {
179 <i>// Title goes red <b>if</b> form has been modified.</i>
180 myForm.header.setStyle(<em>'color'</em>, <em>'red'</em>);
183 });</code></pre><div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>events</code> : String/Array<div class="sub-desc">The event name to bubble, or an Array of event names.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#enableBubble" ext:member="#enableBubble" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-fireEvent"></a><b><a href="source/Observable.html#method-Ext.util.Observable-fireEvent">fireEvent</a></b>( <code>String eventName</code>, <code>Object... args</code> )
185 Boolean<div class="mdesc"><div class="short">Fires the specified event with the passed parameters (minus the event name).
186 An event may be set to bubble up an Obse...</div><div class="long"><p>Fires the specified event with the passed parameters (minus the event name).</p>
187 <p>An event may be set to bubble up an Observable parent hierarchy (See <a href="output/Ext.Component.html#Ext.Component-getBubbleTarget" ext:member="getBubbleTarget" ext:cls="Ext.Component">Ext.Component.getBubbleTarget</a>)
188 by calling <a href="output/Ext.util.Observable.html#Ext.util.Observable-enableBubble" ext:member="enableBubble" ext:cls="Ext.util.Observable">enableBubble</a>.</p><div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>eventName</code> : String<div class="sub-desc">The name of the event to fire.</div></li><li><code>args</code> : Object...<div class="sub-desc">Variable number of parameters are passed to handlers.</div></li></ul><strong>Returns:</strong><ul><li><code>Boolean</code><div class="sub-desc">returns false if any of the handlers return false otherwise it returns true.</div></li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#fireEvent" ext:member="#fireEvent" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-hasListener"></a><b><a href="source/Observable.html#method-Ext.util.Observable-hasListener">hasListener</a></b>( <code>String eventName</code> )
190 Boolean<div class="mdesc"><div class="short">Checks to see if this object has any listeners for a specified event</div><div class="long">Checks to see if this object has any listeners for a specified event<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>eventName</code> : String<div class="sub-desc">The name of the event to check for</div></li></ul><strong>Returns:</strong><ul><li><code>Boolean</code><div class="sub-desc">True if the event is being listened for, else false</div></li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#hasListener" ext:member="#hasListener" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-isLoading"></a><b><a href="source/Connection.html#method-Ext.data.Connection-isLoading">isLoading</a></b>( <span title="Optional" class="optional">[<code>Number transactionId</code>]</span> )
192 Boolean<div class="mdesc"><div class="short">Determine whether this object has a request outstanding.</div><div class="long">Determine whether this object has a request outstanding.<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>transactionId</code> : Number<div class="sub-desc">(Optional) defaults to the last transaction</div></li></ul><strong>Returns:</strong><ul><li><code>Boolean</code><div class="sub-desc">True if there is an outstanding request.</div></li></ul></div></div></div></td><td class="msource">Connection</td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-on"></a><b><a href="source/Observable.html#method-Ext.util.Observable-on">on</a></b>( <code>String eventName</code>, <code>Function handler</code>, <span title="Optional" class="optional">[<code>Object scope</code>]</span>, <span title="Optional" class="optional">[<code>Object options</code>]</span> )
194 void<div class="mdesc"><div class="short">Appends an event handler to this object (shorthand for addListener.)</div><div class="long">Appends an event handler to this object (shorthand for <a href="output/Ext.util.Observable.html#Ext.util.Observable-addListener" ext:member="addListener" ext:cls="Ext.util.Observable">addListener</a>.)<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>eventName</code> : String<div class="sub-desc">The type of event to listen for</div></li><li><code>handler</code> : Function<div class="sub-desc">The method the event invokes</div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope (<code><b>this</b></code> reference) in which the handler function is executed.
195 <b>If omitted, defaults to the object which fired the event.</b></div></li><li><code>options</code> : Object<div class="sub-desc">(optional) An object containing handler configuration.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#on" ext:member="#on" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-purgeListeners"></a><b><a href="source/Observable.html#method-Ext.util.Observable-purgeListeners">purgeListeners</a></b>()
197 void<div class="mdesc"><div class="short">Removes all listeners for this object</div><div class="long">Removes all listeners for this object<div class="mdetail-params"><strong>Parameters:</strong><ul><li>None.</li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#purgeListeners" ext:member="#purgeListeners" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-relayEvents"></a><b><a href="source/Observable-more.html#method-Ext.util.Observable-relayEvents">relayEvents</a></b>( <code>Object o</code>, <code>Array events</code> )
199 void<div class="mdesc"><div class="short">Relays selected events from the specified Observable as if the events were fired by this.</div><div class="long">Relays selected events from the specified Observable as if the events were fired by <tt><b>this</b></tt>.<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>o</code> : Object<div class="sub-desc">The Observable whose events this object is to relay.</div></li><li><code>events</code> : Array<div class="sub-desc">Array of event names to relay.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#relayEvents" ext:member="#relayEvents" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-removeListener"></a><b><a href="source/Observable.html#method-Ext.util.Observable-removeListener">removeListener</a></b>( <code>String eventName</code>, <code>Function handler</code>, <span title="Optional" class="optional">[<code>Object scope</code>]</span> )
201 void<div class="mdesc"><div class="short">Removes an event handler.</div><div class="long">Removes an event handler.<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>eventName</code> : String<div class="sub-desc">The type of event the handler was associated with.</div></li><li><code>handler</code> : Function<div class="sub-desc">The handler to remove. <b>This must be a reference to the function passed into the <a href="output/Ext.util.Observable.html#Ext.util.Observable-addListener" ext:member="addListener" ext:cls="Ext.util.Observable">addListener</a> call.</b></div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope originally specified for the handler.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#removeListener" ext:member="#removeListener" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-request"></a><b><a href="source/Connection.html#method-Ext.data.Connection-request">request</a></b>( <code>Object options</code> )
203 Number<div class="mdesc"><div class="short">Sends an HTTP request to a remote server.
204 Important: Ajax server requests are asynchronous, and this call will
205 return...</div><div class="long"><p>Sends an HTTP request to a remote server.</p>
206 <p><b>Important:</b> Ajax server requests are asynchronous, and this call will
207 return before the response has been received. Process any returned data
208 in a callback function.</p>
209 <pre><code>Ext.Ajax.request({
210 url: <em>'ajax_demo/sample.json'</em>,
211 success: <b>function</b>(response, opts) {
212 <b>var</b> obj = Ext.decode(response.responseText);
215 failure: <b>function</b>(response, opts) {
216 console.log(<em>'server-side failure <b>with</b> status code '</em> + response.status);
219 <p>To execute a callback function in the correct scope, use the <tt>scope</tt> option.</p><div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>options</code> : Object<div class="sub-desc">An object which may contain the following properties:<ul>
220 <li><b>url</b> : String/Function (Optional)<div class="sub-desc">The URL to
221 which to send the request, or a function to call which returns a URL string. The scope of the
222 function is specified by the <tt>scope</tt> option. Defaults to the configured
223 <tt><a href="output/Ext.data.Connection.html#Ext.data.Connection-url" ext:member="url" ext:cls="Ext.data.Connection">url</a></tt>.</div></li>
224 <li><b>params</b> : Object/String/Function (Optional)<div class="sub-desc">
225 An object containing properties which are used as parameters to the
226 request, a url encoded string or a function to call to get either. The scope of the function
227 is specified by the <tt>scope</tt> option.</div></li>
228 <li><b>method</b> : String (Optional)<div class="sub-desc">The HTTP method to use
229 for the request. Defaults to the configured method, or if no method was configured,
230 "GET" if no parameters are being sent, and "POST" if parameters are being sent. Note that
231 the method name is case-sensitive and should be all caps.</div></li>
232 <li><b>callback</b> : Function (Optional)<div class="sub-desc">The
233 function to be called upon receipt of the HTTP response. The callback is
234 called regardless of success or failure and is passed the following
236 <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li>
237 <li><b>success</b> : Boolean<div class="sub-desc">True if the request succeeded.</div></li>
238 <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.
239 See <a href="http://www.w3.org/TR/XMLHttpRequest/">http://www.w3.org/TR/XMLHttpRequest/</a> for details about
240 accessing elements of the response.</div></li>
242 <li><a id="request-option-success"></a><b>success</b> : Function (Optional)<div class="sub-desc">The function
243 to be called upon success of the request. The callback is passed the following
245 <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.</div></li>
246 <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li>
248 <li><b>failure</b> : Function (Optional)<div class="sub-desc">The function
249 to be called upon failure of the request. The callback is passed the
250 following parameters:<ul>
251 <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.</div></li>
252 <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li>
254 <li><b>scope</b> : Object (Optional)<div class="sub-desc">The scope in
255 which to execute the callbacks: The "this" object for the callback function. If the <tt>url</tt>, or <tt>params</tt> options were
256 specified as functions from which to draw values, then this also serves as the scope for those function calls.
257 Defaults to the browser window.</div></li>
258 <li><b>timeout</b> : Number (Optional)<div class="sub-desc">The timeout in milliseconds to be used for this request. Defaults to 30 seconds.</div></li>
259 <li><b>form</b> : Element/HTMLElement/String (Optional)<div class="sub-desc">The <tt><form></tt>
260 Element or the id of the <tt><form></tt> to pull parameters from.</div></li>
261 <li><a id="request-option-isUpload"></a><b>isUpload</b> : Boolean (Optional)<div class="sub-desc"><b>Only meaningful when used
262 with the <tt>form</tt> option</b>.
263 <p>True if the form object is a file upload (will be set automatically if the form was
264 configured with <b><tt>enctype</tt></b> "multipart/form-data").</p>
265 <p>File uploads are not performed using normal "Ajax" techniques, that is they are <b>not</b>
266 performed using XMLHttpRequests. Instead the form is submitted in the standard manner with the
267 DOM <tt><form></tt> element temporarily modified to have its
268 <a href="http://www.w3.org/TR/REC-html40/present/frames.html#adef-target">target</a> set to refer
269 to a dynamically generated, hidden <tt><iframe></tt> which is inserted into the document
270 but removed after the return data has been gathered.</p>
271 <p>The server response is parsed by the browser to create the document for the IFRAME. If the
272 server is using JSON to send the return object, then the
273 <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17">Content-Type</a> header
274 must be set to "text/html" in order to tell the browser to insert the text unchanged into the document body.</p>
275 <p>The response text is retrieved from the document, and a fake XMLHttpRequest object
276 is created containing a <tt>responseText</tt> property in order to conform to the
277 requirements of event handlers and callbacks.</p>
278 <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>
279 and some server technologies (notably JEE) may require some custom processing in order to
280 retrieve parameter names and parameter values from the packet content.</p>
282 <li><b>headers</b> : Object (Optional)<div class="sub-desc">Request
283 headers to set for the request.</div></li>
284 <li><b>xmlData</b> : Object (Optional)<div class="sub-desc">XML document
285 to use for the post. Note: This will be used instead of params for the post
286 data. Any params will be appended to the URL.</div></li>
287 <li><b>jsonData</b> : Object/String (Optional)<div class="sub-desc">JSON
288 data to use as the post. Note: This will be used instead of params for the post
289 data. Any params will be appended to the URL.</div></li>
290 <li><b>disableCaching</b> : Boolean (Optional)<div class="sub-desc">True
291 to add a unique cache-buster param to GET requests.</div></li>
293 <p>The options object may also contain any other property which might be needed to perform
294 postprocessing in a callback because it is passed to callback functions.</p></div></li></ul><strong>Returns:</strong><ul><li><code>Number</code><div class="sub-desc">transactionId The id of the server transaction. This may be used
295 to cancel the request.</div></li></ul></div></div></div></td><td class="msource">Connection</td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-resumeEvents"></a><b><a href="source/Observable.html#method-Ext.util.Observable-resumeEvents">resumeEvents</a></b>()
297 void<div class="mdesc"><div class="short">Resume firing events. (see suspendEvents)
298 If events were suspended using the queueSuspended parameter, then all
299 event...</div><div class="long">Resume firing events. (see <a href="output/Ext.util.Observable.html#Ext.util.Observable-suspendEvents" ext:member="suspendEvents" ext:cls="Ext.util.Observable">suspendEvents</a>)
300 If events were suspended using the <tt><b>queueSuspended</b></tt> parameter, then all
301 events fired during event suspension will be sent to any listeners now.<div class="mdetail-params"><strong>Parameters:</strong><ul><li>None.</li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#resumeEvents" ext:member="#resumeEvents" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-suspendEvents"></a><b><a href="source/Observable.html#method-Ext.util.Observable-suspendEvents">suspendEvents</a></b>( <code>Boolean queueSuspended</code> )
303 void<div class="mdesc"><div class="short">Suspend the firing of all events. (see resumeEvents)</div><div class="long">Suspend the firing of all events. (see <a href="output/Ext.util.Observable.html#Ext.util.Observable-resumeEvents" ext:member="resumeEvents" ext:cls="Ext.util.Observable">resumeEvents</a>)<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>queueSuspended</code> : Boolean<div class="sub-desc">Pass as true to queue up suspended events to be fired
304 after the <a href="output/Ext.util.Observable.html#Ext.util.Observable-resumeEvents" ext:member="resumeEvents" ext:cls="Ext.util.Observable">resumeEvents</a> call instead of discarding all suspended events;</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#suspendEvents" ext:member="#suspendEvents" ext:cls="Ext.util.Observable">Observable</a></td></tr><tr class="method-row expandable inherited"><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.util.Observable-un"></a><b><a href="source/Observable.html#method-Ext.util.Observable-un">un</a></b>( <code>String eventName</code>, <code>Function handler</code>, <span title="Optional" class="optional">[<code>Object scope</code>]</span> )
306 void<div class="mdesc"><div class="short">Removes an event handler (shorthand for removeListener.)</div><div class="long">Removes an event handler (shorthand for <a href="output/Ext.util.Observable.html#Ext.util.Observable-removeListener" ext:member="removeListener" ext:cls="Ext.util.Observable">removeListener</a>.)<div class="mdetail-params"><strong>Parameters:</strong><ul><li><code>eventName</code> : String<div class="sub-desc">The type of event the handler was associated with.</div></li><li><code>handler</code> : Function<div class="sub-desc">The handler to remove. <b>This must be a reference to the function passed into the <a href="output/Ext.util.Observable.html#Ext.util.Observable-addListener" ext:member="addListener" ext:cls="Ext.util.Observable">addListener</a> call.</b></div></li><li><code>scope</code> : Object<div class="sub-desc">(optional) The scope originally specified for the handler.</div></li></ul><strong>Returns:</strong><ul><li>void</li></ul></div></div></div></td><td class="msource"><a href="output/Ext.util.Observable.html#un" ext:member="#un" ext:cls="Ext.util.Observable">Observable</a></td></tr></tbody></table><a id="Ext.data.Connection-events"></a><h2>Public Events</h2><table cellspacing="0" class="member-table"><tbody><tr><th colspan="2" class="sig-header">Event</th><th class="msource-header">Defined By</th></tr><tr class="method-row expandable "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-beforerequest"></a><b><a href="source/Connection.html#event-Ext.data.Connection-beforerequest">beforerequest</a></b> :
307 ( <code>Connection conn</code>, <code>Object options</code> )
308 <div class="mdesc"><div class="short">Fires before a network request is made to retrieve a data object.</div><div class="long">Fires before a network request is made to retrieve a data object.<div class="mdetail-params"><strong style="font-weight: normal;">Listeners will be called with the following arguments:</strong><ul><li><code>conn</code> : Connection<div class="sub-desc">This Connection object.</div></li><li><code>options</code> : Object<div class="sub-desc">The options config object passed to the <a href="output/Ext.data.Connection.html#Ext.data.Connection-request" ext:member="request" ext:cls="Ext.data.Connection">request</a> method.</div></li></ul></div></div></div></td><td class="msource">Connection</td></tr><tr class="method-row expandable "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-requestcomplete"></a><b><a href="source/Connection.html#event-Ext.data.Connection-requestcomplete">requestcomplete</a></b> :
309 ( <code>Connection conn</code>, <code>Object response</code>, <code>Object options</code> )
310 <div class="mdesc"><div class="short">Fires if the request was successfully completed.</div><div class="long">Fires if the request was successfully completed.<div class="mdetail-params"><strong style="font-weight: normal;">Listeners will be called with the following arguments:</strong><ul><li><code>conn</code> : Connection<div class="sub-desc">This Connection object.</div></li><li><code>response</code> : Object<div class="sub-desc">The XHR object containing the response data.
311 See <a href="http://www.w3.org/TR/XMLHttpRequest/">The XMLHttpRequest Object</a>
312 for details.</div></li><li><code>options</code> : Object<div class="sub-desc">The options config object passed to the <a href="output/Ext.data.Connection.html#Ext.data.Connection-request" ext:member="request" ext:cls="Ext.data.Connection">request</a> method.</div></li></ul></div></div></div></td><td class="msource">Connection</td></tr><tr class="method-row expandable "><td class="micon"><a href="#expand" class="exi"> </a></td><td class="sig"><a id="Ext.data.Connection-requestexception"></a><b><a href="source/Connection.html#event-Ext.data.Connection-requestexception">requestexception</a></b> :
313 ( <code>Connection conn</code>, <code>Object response</code>, <code>Object options</code> )
314 <div class="mdesc"><div class="short">Fires if an error HTTP status was returned from the server.
315 See <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-...</div><div class="long">Fires if an error HTTP status was returned from the server.
316 See <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html">HTTP Status Code Definitions</a>
317 for details of HTTP status codes.<div class="mdetail-params"><strong style="font-weight: normal;">Listeners will be called with the following arguments:</strong><ul><li><code>conn</code> : Connection<div class="sub-desc">This Connection object.</div></li><li><code>response</code> : Object<div class="sub-desc">The XHR object containing the response data.
318 See <a href="http://www.w3.org/TR/XMLHttpRequest/">The XMLHttpRequest Object</a>
319 for details.</div></li><li><code>options</code> : Object<div class="sub-desc">The options config object passed to the <a href="output/Ext.data.Connection.html#Ext.data.Connection-request" ext:member="request" ext:cls="Ext.data.Connection">request</a> method.</div></li></ul></div></div></div></td><td class="msource">Connection</td></tr></tbody></table></div>