Properties

Methods

Events

Config Options

Direct Link

Observable
  Connection
    Ajax

Class CQ.Ext.Ajax

Package:	CQ.Ext
Class:	Ajax
Extends:	CQ.Ext.data.Connection
Clientlib:	cq.widgets

The global Ajax request class that provides a simple way to make Ajax requests with maximum flexibility.

Since CQ.Ext.Ajax is a singleton, you can set common properties/events for it once and override them at the request function level only if necessary.

Common Properties you may want to set are:

method
extraParams
url

// Default headers to pass in every request
CQ.Ext.Ajax.defaultHeaders = {
    'Powered-By': 'CQ.Ext'
};

Common Events you may want to set are:

// Example: show a spinner during all Ajax requests
CQ.Ext.Ajax.on('beforerequest', this.showSpinner, this);
CQ.Ext.Ajax.on('requestcomplete', this.hideSpinner, this);
CQ.Ext.Ajax.on('requestexception', this.hideSpinner, this);

An example request:

// Basic request
CQ.Ext.Ajax.request({
   url: 'foo.php',
   success: someFn,
   failure: otherFn,
   headers: {
       'my-header': 'foo'
   },
   params: { foo: 'bar' }
});

// Simple ajax form submission
CQ.Ext.Ajax.request({
    form: 'some-form',
    params: 'foo=bar'
});

This class is a singleton and cannot be created directly.

Config Options

Config Options		Defined By
	disableCachingParam : String (Optional) Change the parameter which is sent went disabling caching through a cache buster. Defaults to '_dc'	Connection

Public Properties

Property		Defined By
	autoAbort : Boolean Whether a new request should abort any pending requests. (defaults to false)	Ajax
	defaultHeaders : Object An object containing request headers which are added to each request made by this object (defaults to undefined).	Ajax
	disableCaching : Boolean True to add a unique cache-buster param to GET requests. (defaults to true)	Ajax
	extraParams : Object An object containing properties which are used as extra parameters to each request made by this object (defaults to ... An object containing properties which are used as extra parameters to each request made by this object (defaults to undefined). Session information and other data that you need to pass with each request are commonly put here.	Ajax
	method : String The default HTTP method to be used for requests. Note that this is case-sensitive and should be all caps (defaults t... The default HTTP method to be used for requests. Note that this is case-sensitive and should be all caps (defaults to undefined; if not set but params are present will use `"POST"`, otherwise will use `"GET"`.)	Ajax
	timeout : Number The timeout in milliseconds to be used for requests. (defaults to 30000)	Ajax
	url : String The default URL to be used for requests to the server. (defaults to undefined) If the server receives all requests t... The default URL to be used for requests to the server. (defaults to undefined) If the server receives all requests through one URL, setting this once is easier than entering it on every request.	Ajax

Public Methods

Method		Defined By
	abort( [`Number transactionId`] ) : void Aborts any outstanding request. Aborts any outstanding request. Parameters: `transactionId` : Number (Optional) defaults to the last transaction Returns: `void`	Connection
	enableBubble( `String/Array events` ) : void Enables events fired by this Observable to bubble up an owner hierarchy by calling this.getBubbleTarget() if present.... Enables events fired by this Observable to bubble up an owner hierarchy by calling `this.getBubbleTarget()` if present. There is no implementation in the Observable base class. This is commonly used by CQ.Ext.Components to bubble events to owner Containers. See CQ.Ext.Component.getBubbleTarget. The default implementation in CQ.Ext.Component returns the Component's immediate owner. But if a known target is required, this can be overridden to access the required target more quickly. Example: CQ.Ext.override(CQ.Ext.form.Field, { // Add functionality to Field's initComponent to enable the change event to bubble initComponent : CQ.Ext.form.Field.prototype.initComponent.createSequence(function() { this.enableBubble('change'); }), // We know that we want Field's events to bubble directly to the FormPanel. getBubbleTarget : function() { if (!this.formPanel) { this.formPanel = this.findParentByType('form'); } return this.formPanel; } }); var myForm = new CQ.Ext.formPanel({ title: 'User Details', items: [{ ... }], listeners: { change: function() { // Title goes red if form has been modified. myForm.header.setStyle('color', 'red'); } } }); Parameters: `events` : String/Array The event name to bubble, or an Array of event names. Returns: `void`	Observable
	isLoading( [`Number transactionId`] ) : Boolean Determine whether this object has a request outstanding. Determine whether this object has a request outstanding. Parameters: `transactionId` : Number (Optional) defaults to the last transaction Returns: `Boolean` True if there is an outstanding request.	Connection
	relayEvents( `Object o`, `Array events` ) : void Relays selected events from the specified Observable as if the events were fired by `this`. Relays selected events from the specified Observable as if the events were fired by `this`. Parameters: `o` : Object The Observable whose events this object is to relay. `events` : Array Array of event names to relay. Returns: `void`	Observable
	request( [`Object options`] ) : Number Sends an HTTP request to a remote server. Important: Ajax server requests are asynchronous, and this call will return... Sends an HTTP request to a remote server. Important: Ajax server requests are asynchronous, and this call will return before the response has been received. Process any returned data in a callback function. `CQ.Ext.Ajax.request({ url: 'ajax_demo/sample.json', success: function(response, opts) { var obj = CQ.Ext.decode(response.responseText); console.dir(obj); }, failure: function(response, opts) { console.log('server-side failure with status code ' + response.status); } });` To execute a callback function in the correct scope, use the `scope` option. Parameters: `options` : Object An object which may contain the following properties: url : String/Function (Optional) The URL to which to send the request, or a function to call which returns a URL string. The scope of the function is specified by the `scope` option. Defaults to the configured `url`. params : Object/String/Function (Optional) An object containing properties which are used as parameters to the request, a url encoded string or a function to call to get either. The scope of the function is specified by the `scope` option. method : String (Optional) The HTTP method to use for the request. Defaults to the configured method, or if no method was configured, "GET" if no parameters are being sent, and "POST" if parameters are being sent. Note that the method name is case-sensitive and should be all caps. callback : Function (Optional) The function to be called upon receipt of the HTTP response. The callback is called regardless of success or failure and is passed the following parameters: options : Object The parameter to the request call. success : Boolean True if the request succeeded. response : Object The XMLHttpRequest object containing the response data. See http://www.w3.org/TR/XMLHttpRequest/ for details about accessing elements of the response. success : Function (Optional) The function to be called upon success of the request. The callback is passed the following parameters: response : Object The XMLHttpRequest object containing the response data. options : Object The parameter to the request call. failure : Function (Optional) The function to be called upon failure of the request. The callback is passed the following parameters: response : Object The XMLHttpRequest object containing the response data. options : Object The parameter to the request call. scope : Object (Optional) The scope in which to execute the callbacks: The "this" object for the callback function. If the `url`, or `params` options were specified as functions from which to draw values, then this also serves as the scope for those function calls. Defaults to the browser window. timeout : Number (Optional) The timeout in milliseconds to be used for this request. Defaults to 30 seconds. form : Element/HTMLElement/String (Optional) The `<form>` Element or the id of the `<form>` to pull parameters from. isUpload : Boolean (Optional) Only meaningful when used with the `form` option. True if the form object is a file upload (will be set automatically if the form was configured with `enctype` "multipart/form-data"). File uploads are not performed using normal "Ajax" techniques, that is they are not performed using XMLHttpRequests. Instead the form is submitted in the standard manner with the DOM `<form>` element temporarily modified to have its target set to refer to a dynamically generated, hidden `<iframe>` which is inserted into the document but removed after the return data has been gathered. The server response is parsed by the browser to create the document for the IFRAME. If the server is using JSON to send the return object, then the Content-Type header must be set to "text/html" in order to tell the browser to insert the text unchanged into the document body. The response text is retrieved from the document, and a fake XMLHttpRequest object is created containing a `responseText` property in order to conform to the requirements of event handlers and callbacks. Be aware that file upload packets are sent with the content type multipart/form and some server technologies (notably JEE) may require some custom processing in order to retrieve parameter names and parameter values from the packet content. headers : Object (Optional) Request headers to set for the request. xmlData : Object (Optional) XML document to use for the post. Note: This will be used instead of params for the post data. Any params will be appended to the URL. jsonData : Object/String (Optional) JSON data to use as the post. Note: This will be used instead of params for the post data. Any params will be appended to the URL. disableCaching : Boolean (Optional) True to add a unique cache-buster param to GET requests. The options object may also contain any other property which might be needed to perform postprocessing in a callback because it is passed to callback functions. Returns: `Number` transactionId The id of the server transaction. This may be used to cancel the request.	Connection
	serializeForm( `String/HTMLElement form` ) : String Serialize the passed form into a url encoded string Serialize the passed form into a url encoded string Parameters: `form` : String/HTMLElement Returns: `String`	Ajax

Public Events

Event		Defined By
	beforerequest : ( `Connection conn`, `Object options` ) Fires before a network request is made to retrieve a data object. Fires before a network request is made to retrieve a data object. Listeners will be called with the following arguments: `conn` : Connection This Connection object. `options` : Object The options config object passed to the request method.	Connection
	requestcomplete : ( `Connection conn`, `Object response`, `Object options` ) Fires if the request was successfully completed. Fires if the request was successfully completed. Listeners will be called with the following arguments: `conn` : Connection This Connection object. `response` : Object The XHR object containing the response data. See The XMLHttpRequest Object for details. `options` : Object The options config object passed to the request method.	Connection
	requestexception : ( `Connection conn`, `Object response`, `Object options` ) Fires if an error HTTP status was returned from the server. See HTTP Status Code Definitions for details of HTTP stat... Fires if an error HTTP status was returned from the server. See HTTP Status Code Definitions for details of HTTP status codes. Listeners will be called with the following arguments: `conn` : Connection This Connection object. `response` : Object The XHR object containing the response data. See The XMLHttpRequest Object for details. `options` : Object The options config object passed to the request method.	Connection