*/
/**
* @author Ed Spencer
- * @class Ext.data.proxy.JsonP
- * @extends Ext.data.proxy.Server
*
- * <p>JsonPProxy is useful when you need to load data from a domain other than the one your application is running
- * on. If your application is running on http://domainA.com it cannot use {@link Ext.data.proxy.Ajax Ajax} to load its
- * data from http://domainB.com because cross-domain ajax requests are prohibited by the browser.</p>
+ * The JsonP proxy is useful when you need to load data from a domain other than the one your application is running on. If
+ * your application is running on http://domainA.com it cannot use {@link Ext.data.proxy.Ajax Ajax} to load its data
+ * from http://domainB.com because cross-domain ajax requests are prohibited by the browser.
*
- * <p>We can get around this using a JsonPProxy. JsonPProxy injects a <script> tag into the DOM whenever
- * an AJAX request would usually be made. Let's say we want to load data from http://domainB.com/users - the script tag
- * that would be injected might look like this:</p>
+ * We can get around this using a JsonP proxy. JsonP proxy injects a `<script>` tag into the DOM whenever an AJAX request
+ * would usually be made. Let's say we want to load data from http://domainB.com/users - the script tag that would be
+ * injected might look like this:
*
-<pre><code>
-<script src="http://domainB.com/users?callback=someCallback"></script>
-</code></pre>
+ * <script src="http://domainB.com/users?callback=someCallback"></script>
*
- * <p>When we inject the tag above, the browser makes a request to that url and includes the response as if it was any
- * other type of JavaScript include. By passing a callback in the url above, we're telling domainB's server that we
- * want to be notified when the result comes in and that it should call our callback function with the data it sends
- * back. So long as the server formats the response to look like this, everything will work:</p>
+ * When we inject the tag above, the browser makes a request to that url and includes the response as if it was any
+ * other type of JavaScript include. By passing a callback in the url above, we're telling domainB's server that we want
+ * to be notified when the result comes in and that it should call our callback function with the data it sends back. So
+ * long as the server formats the response to look like this, everything will work:
*
-<pre><code>
-someCallback({
- users: [
- {
- id: 1,
- name: "Ed Spencer",
- email: "ed@sencha.com"
- }
- ]
-});
-</code></pre>
+ * someCallback({
+ * users: [
+ * {
+ * id: 1,
+ * name: "Ed Spencer",
+ * email: "ed@sencha.com"
+ * }
+ * ]
+ * });
*
- * <p>As soon as the script finishes loading, the 'someCallback' function that we passed in the url is called with the
- * JSON object that the server returned.</p>
+ * As soon as the script finishes loading, the 'someCallback' function that we passed in the url is called with the JSON
+ * object that the server returned.
*
- * <p>JsonPProxy takes care of all of this automatically. It formats the url you pass, adding the callback
- * parameter automatically. It even creates a temporary callback function, waits for it to be called and then puts
- * the data into the Proxy making it look just like you loaded it through a normal {@link Ext.data.proxy.Ajax AjaxProxy}.
- * Here's how we might set that up:</p>
+ * JsonP proxy takes care of all of this automatically. It formats the url you pass, adding the callback parameter
+ * automatically. It even creates a temporary callback function, waits for it to be called and then puts the data into
+ * the Proxy making it look just like you loaded it through a normal {@link Ext.data.proxy.Ajax AjaxProxy}. Here's how
+ * we might set that up:
*
-<pre><code>
-Ext.define('User', {
- extend: 'Ext.data.Model',
- fields: ['id', 'name', 'email']
-});
-
-var store = new Ext.data.Store({
- model: 'User',
- proxy: {
- type: 'jsonp',
- url : 'http://domainB.com/users'
- }
-});
-
-store.load();
-</code></pre>
+ * Ext.define('User', {
+ * extend: 'Ext.data.Model',
+ * fields: ['id', 'name', 'email']
+ * });
*
- * <p>That's all we need to do - JsonPProxy takes care of the rest. In this case the Proxy will have injected a
- * script tag like this:
+ * var store = Ext.create('Ext.data.Store', {
+ * model: 'User',
+ * proxy: {
+ * type: 'jsonp',
+ * url : 'http://domainB.com/users'
+ * }
+ * });
*
-<pre><code>
-<script src="http://domainB.com/users?callback=stcCallback001" id="stcScript001"></script>
-</code></pre>
+ * store.load();
*
- * <p><u>Customization</u></p>
+ * That's all we need to do - JsonP proxy takes care of the rest. In this case the Proxy will have injected a script tag
+ * like this:
*
- * <p>Most parts of this script tag can be customized using the {@link #callbackParam}, {@link #callbackPrefix} and
- * {@link #scriptIdPrefix} configurations. For example:
+ * <script src="http://domainB.com/users?callback=callback1"></script>
*
-<pre><code>
-var store = new Ext.data.Store({
- model: 'User',
- proxy: {
- type: 'jsonp',
- url : 'http://domainB.com/users',
- callbackParam: 'theCallbackFunction',
- callbackPrefix: 'ABC',
- scriptIdPrefix: 'injectedScript'
- }
-});
-
-store.load();
-</code></pre>
+ * # Customization
+ *
+ * This script tag can be customized using the {@link #callbackKey} configuration. For example:
+ *
+ * var store = Ext.create('Ext.data.Store', {
+ * model: 'User',
+ * proxy: {
+ * type: 'jsonp',
+ * url : 'http://domainB.com/users',
+ * callbackKey: 'theCallbackFunction'
+ * }
+ * });
+ *
+ * store.load();
+ *
+ * Would inject a script tag like this:
*
- * <p>Would inject a script tag like this:</p>
+ * <script src="http://domainB.com/users?theCallbackFunction=callback1"></script>
*
-<pre><code>
-<script src="http://domainB.com/users?theCallbackFunction=ABC001" id="injectedScript001"></script>
-</code></pre>
+ * # Implementing on the server side
*
- * <p><u>Implementing on the server side</u></p>
+ * The remote server side needs to be configured to return data in this format. Here are suggestions for how you might
+ * achieve this using Java, PHP and ASP.net:
*
- * <p>The remote server side needs to be configured to return data in this format. Here are suggestions for how you
- * might achieve this using Java, PHP and ASP.net:</p>
+ * Java:
*
- * <p>Java:</p>
+ * boolean jsonP = false;
+ * String cb = request.getParameter("callback");
+ * if (cb != null) {
+ * jsonP = true;
+ * response.setContentType("text/javascript");
+ * } else {
+ * response.setContentType("application/x-json");
+ * }
+ * Writer out = response.getWriter();
+ * if (jsonP) {
+ * out.write(cb + "(");
+ * }
+ * out.print(dataBlock.toJsonString());
+ * if (jsonP) {
+ * out.write(");");
+ * }
*
-<pre><code>
-boolean jsonP = false;
-String cb = request.getParameter("callback");
-if (cb != null) {
- jsonP = true;
- response.setContentType("text/javascript");
-} else {
- response.setContentType("application/x-json");
-}
-Writer out = response.getWriter();
-if (jsonP) {
- out.write(cb + "(");
-}
-out.print(dataBlock.toJsonString());
-if (jsonP) {
- out.write(");");
-}
-</code></pre>
+ * PHP:
*
- * <p>PHP:</p>
+ * $callback = $_REQUEST['callback'];
*
-<pre><code>
-$callback = $_REQUEST['callback'];
-
-// Create the output object.
-$output = array('a' => 'Apple', 'b' => 'Banana');
-
-//start output
-if ($callback) {
- header('Content-Type: text/javascript');
- echo $callback . '(' . json_encode($output) . ');';
-} else {
- header('Content-Type: application/x-json');
- echo json_encode($output);
-}
-</code></pre>
+ * // Create the output object.
+ * $output = array('a' => 'Apple', 'b' => 'Banana');
*
- * <p>ASP.net:</p>
+ * //start output
+ * if ($callback) {
+ * header('Content-Type: text/javascript');
+ * echo $callback . '(' . json_encode($output) . ');';
+ * } else {
+ * header('Content-Type: application/x-json');
+ * echo json_encode($output);
+ * }
*
-<pre><code>
-String jsonString = "{success: true}";
-String cb = Request.Params.Get("callback");
-String responseString = "";
-if (!String.IsNullOrEmpty(cb)) {
- responseString = cb + "(" + jsonString + ")";
-} else {
- responseString = jsonString;
-}
-Response.Write(responseString);
-</code></pre>
+ * ASP.net:
*
+ * String jsonString = "{success: true}";
+ * String cb = Request.Params.Get("callback");
+ * String responseString = "";
+ * if (!String.IsNullOrEmpty(cb)) {
+ * responseString = cb + "(" + jsonString + ")";
+ * } else {
+ * responseString = jsonString;
+ * }
+ * Response.Write(responseString);
*/
Ext.define('Ext.data.proxy.JsonP', {
extend: 'Ext.data.proxy.Server',
defaultWriterType: 'base',
/**
- * @cfg {String} callbackKey (Optional) See {@link Ext.data.JsonP#callbackKey}.
+ * @cfg {String} callbackKey
+ * See {@link Ext.data.JsonP#callbackKey}.
*/
callbackKey : 'callback',
/**
* @cfg {String} recordParam
- * The param name to use when passing records to the server (e.g. 'records=someEncodedRecordString').
- * Defaults to 'records'
+ * The param name to use when passing records to the server (e.g. 'records=someEncodedRecordString'). Defaults to
+ * 'records'
*/
recordParam: 'records',
/**
- * @cfg {Boolean} autoAppendParams True to automatically append the request's params to the generated url. Defaults to true
+ * @cfg {Boolean} autoAppendParams
+ * True to automatically append the request's params to the generated url. Defaults to true
*/
autoAppendParams: true,
constructor: function(){
this.addEvents(
/**
- * @event exception
+ * @event
* Fires when the server returns an exception
* @param {Ext.data.proxy.Proxy} this
* @param {Ext.data.Request} request The request that was sent
/**
* @private
- * Performs the read request to the remote domain. JsonPProxy does not actually create an Ajax request,
+ * Performs the read request to the remote domain. JsonP proxy does not actually create an Ajax request,
* instead we write out a <script> tag based on the configuration of the internal Ext.data.Request object
* @param {Ext.data.Operation} operation The {@link Ext.data.Operation Operation} object to execute
* @param {Function} callback A callback function to execute when the Operation has been completed
request = writer.write(request);
}
- //apply JsonPProxy-specific attributes to the Request
+ // apply JsonP proxy-specific attributes to the Request
Ext.apply(request, {
callbackKey: me.callbackKey,
timeout: me.timeout,
disableCaching: false, // handled by the proxy
callback: me.createRequestCallback(request, operation, callback, scope)
});
-
+
// prevent doubling up
if (me.autoAppendParams) {
request.params = {};
}
-
+
request.jsonp = Ext.data.JsonP.request(request);
// restore on the request
request.params = params;
me.processResponse(success, operation, request, response, callback, scope);
};
},
-
+
// inherit docs
setException: function(operation, response) {
operation.setException(operation.request.jsonp.errorType);
filter, i;
delete params.filters;
-
+
if (me.autoAppendParams) {
url = Ext.urlAppend(url, Ext.Object.toQueryString(params));
}
},
/**
- * Encodes an array of records into a string suitable to be appended to the script src url. This is broken
- * out into its own function so that it can be easily overridden.
- * @param {Array} records The records array
+ * Encodes an array of records into a string suitable to be appended to the script src url. This is broken out into
+ * its own function so that it can be easily overridden.
+ * @param {Ext.data.Model[]} records The records array
* @return {String} The encoded records string
*/
encodeRecords: function(records) {
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