(function(){
    var BEFOREREQUEST = "beforerequest",
        REQUESTCOMPLETE = "requestcomplete",
        REQUESTEXCEPTION = "requestexception",
        UNDEFINED = undefined,
        LOAD = 'load',
        POST = 'POST',
        GET = 'GET',
        WINDOW = window;
    
    
/** * @class Ext.data.Connection * @extends Ext.util.Observable *

The class encapsulates a connection to the page's originating domain, allowing requests to be made * either to a configured URL, or to a URL specified at request time.

*

Requests made by this class are asynchronous, and will return immediately. No data from * the server will be available to the statement immediately following the {@link #request} call. * To process returned data, use a * success callback * in the request options object, * or an {@link #requestcomplete event listener}.

*

File Uploads

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.

*

Characters which are significant to an HTML parser must be sent as HTML entities, so encode * "<" as "&lt;", "&" as "&amp;" etc.

*

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.

* @constructor * @param {Object} config a configuration object. */ Ext.data.Connection = function(config){ Ext.apply(this, config); this.addEvents(
/** * @event beforerequest * Fires before a network request is made to retrieve a data object. * @param {Connection} conn This Connection object. * @param {Object} options The options config object passed to the {@link #request} method. */ BEFOREREQUEST,
/** * @event requestcomplete * Fires if the request was successfully completed. * @param {Connection} conn This Connection object. * @param {Object} response The XHR object containing the response data. * See The XMLHttpRequest Object * for details. * @param {Object} options The options config object passed to the {@link #request} method. */ REQUESTCOMPLETE,
/** * @event requestexception * Fires if an error HTTP status was returned from the server. * See HTTP Status Code Definitions * for details of HTTP status codes. * @param {Connection} conn This Connection object. * @param {Object} response The XHR object containing the response data. * See The XMLHttpRequest Object * for details. * @param {Object} options The options config object passed to the {@link #request} method. */ REQUESTEXCEPTION ); Ext.data.Connection.superclass.constructor.call(this); }; // private function handleResponse(response){ this.transId = false; var options = response.argument.options; response.argument = options ? options.argument : null; this.fireEvent(REQUESTCOMPLETE, this, response, options); if(options.success){ options.success.call(options.scope, response, options); } if(options.callback){ options.callback.call(options.scope, options, true, response); } } // private function handleFailure(response, e){ this.transId = false; var options = response.argument.options; response.argument = options ? options.argument : null; this.fireEvent(REQUESTEXCEPTION, this, response, options, e); if(options.failure){ options.failure.call(options.scope, response, options); } if(options.callback){ options.callback.call(options.scope, options, false, response); } } // private function doFormUpload(o, ps, url){ var id = Ext.id(), doc = document, frame = doc.createElement('iframe'), form = Ext.getDom(o.form), hiddens = [], hd, encoding = 'multipart/form-data', buf = { target: form.target, method: form.method, encoding: form.encoding, enctype: form.enctype, action: form.action }; Ext.apply(frame, { id: id, name: id, className: 'x-hidden', src: Ext.SSL_SECURE_URL // for IE }); doc.body.appendChild(frame); // This is required so that IE doesn't pop the response up in a new window. if(Ext.isIE){ document.frames[id].name = id; } Ext.apply(form, { target: id, method: POST, enctype: encoding, encoding: encoding, action: url || buf.action }); // add dynamic params ps = Ext.urlDecode(ps, false); for(var k in ps){ if(ps.hasOwnProperty(k)){ hd = doc.createElement('input'); hd.type = 'hidden'; hd.value = ps[hd.name = k]; form.appendChild(hd); hiddens.push(hd); } } function cb(){ var me = this, // bogus response object r = {responseText : '', responseXML : null, argument : o.argument}, doc, firstChild; try{ doc = frame.contentWindow.document || frame.contentDocument || WINDOW.frames[id].document; if(doc){ if(doc.body){ if(/textarea/i.test((firstChild = doc.body.firstChild || {}).tagName)){ // json response wrapped in textarea r.responseText = firstChild.value; }else{ r.responseText = doc.body.innerHTML; } } //in IE the document may still have a body even if returns XML. r.responseXML = doc.XMLDocument || doc; } } catch(e) {} Ext.EventManager.removeListener(frame, LOAD, cb, me); me.fireEvent(REQUESTCOMPLETE, me, r, o); function runCallback(fn, scope, args){ if(Ext.isFunction(fn)){ fn.apply(scope, args); } } runCallback(o.success, o.scope, [r, o]); runCallback(o.callback, o.scope, [o, true, r]); if(!me.debugUploads){ setTimeout(function(){Ext.removeNode(frame);}, 100); } } Ext.EventManager.on(frame, LOAD, cb, this); form.submit(); Ext.apply(form, buf); Ext.each(hiddens, function(h) { Ext.removeNode(h); }); } Ext.extend(Ext.data.Connection, Ext.util.Observable, {
/** * @cfg {String} url (Optional)

The default URL to be used for requests to the server. Defaults to undefined.

*

The url config may be a function which returns the URL to use for the Ajax request. The scope * (this reference) of the function is the scope option passed to the {@link #request} method.

*/
/** * @cfg {Object} extraParams (Optional) An object containing properties which are used as * extra parameters to each request made by this object. (defaults to undefined) */
/** * @cfg {Object} defaultHeaders (Optional) An object containing request headers which are added * to each request made by this object. (defaults to undefined) */
/** * @cfg {String} method (Optional) The default HTTP method to be used for requests. * (defaults to undefined; if not set, but {@link #request} params are present, POST will be used; * otherwise, GET will be used.) */
/** * @cfg {Number} timeout (Optional) The timeout in milliseconds to be used for requests. (defaults to 30000) */ timeout : 30000,
/** * @cfg {Boolean} autoAbort (Optional) Whether this request should abort any pending requests. (defaults to false) * @type Boolean */ autoAbort:false,
/** * @cfg {Boolean} disableCaching (Optional) True to add a unique cache-buster param to GET requests. (defaults to true) * @type Boolean */ disableCaching: true,
/** * @cfg {String} disableCachingParam (Optional) Change the parameter which is sent went disabling caching * through a cache buster. Defaults to '_dc' * @type String */ disableCachingParam: '_dc',
/** *

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.

*

Ext.Ajax.request({
   url: 'ajax_demo/sample.json',
   success: function(response, opts) {
      var obj = 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.

* @param {Object} options An object which may contain the following properties:

*

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.

* @return {Number} transactionId The id of the server transaction. This may be used * to cancel the request. */ request : function(o){ var me = this; if(me.fireEvent(BEFOREREQUEST, me, o)){ if (o.el) { if(!Ext.isEmpty(o.indicatorText)){ me.indicatorText = '
'+o.indicatorText+"
"; } if(me.indicatorText) { Ext.getDom(o.el).innerHTML = me.indicatorText; } o.success = (Ext.isFunction(o.success) ? o.success : function(){}).createInterceptor(function(response) { Ext.getDom(o.el).innerHTML = response.responseText; }); } var p = o.params, url = o.url || me.url, method, cb = {success: handleResponse, failure: handleFailure, scope: me, argument: {options: o}, timeout : o.timeout || me.timeout }, form, serForm; if (Ext.isFunction(p)) { p = p.call(o.scope||WINDOW, o); } p = Ext.urlEncode(me.extraParams, Ext.isObject(p) ? Ext.urlEncode(p) : p); if (Ext.isFunction(url)) { url = url.call(o.scope || WINDOW, o); } if((form = Ext.getDom(o.form))){ url = url || form.action; if(o.isUpload || /multipart\/form-data/i.test(form.getAttribute("enctype"))) { return doFormUpload.call(me, o, p, url); } serForm = Ext.lib.Ajax.serializeForm(form); p = p ? (p + '&' + serForm) : serForm; } method = o.method || me.method || ((p || o.xmlData || o.jsonData) ? POST : GET); if(method === GET && (me.disableCaching && o.disableCaching !== false) || o.disableCaching === true){ var dcp = o.disableCachingParam || me.disableCachingParam; url = Ext.urlAppend(url, dcp + '=' + (new Date().getTime())); } o.headers = Ext.apply(o.headers || {}, me.defaultHeaders || {}); if(o.autoAbort === true || me.autoAbort) { me.abort(); } if((method == GET || o.xmlData || o.jsonData) && p){ url = Ext.urlAppend(url, p); p = ''; } return (me.transId = Ext.lib.Ajax.request(method, url, cb, p, o)); }else{ return o.callback ? o.callback.apply(o.scope, [o,UNDEFINED,UNDEFINED]) : null; } },
/** * Determine whether this object has a request outstanding. * @param {Number} transactionId (Optional) defaults to the last transaction * @return {Boolean} True if there is an outstanding request. */ isLoading : function(transId){ return transId ? Ext.lib.Ajax.isCallInProgress(transId) : !! this.transId; },
/** * Aborts any outstanding request. * @param {Number} transactionId (Optional) defaults to the last transaction */ abort : function(transId){ if(transId || this.isLoading()){ Ext.lib.Ajax.abort(transId || this.transId); } } }); })();
/** * @class Ext.Ajax * @extends Ext.data.Connection *

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

*

Since 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:

*

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

*

Common Events you may want to set are:

*

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

*

An example request:

*

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

// Simple ajax form submission
Ext.Ajax.{@link Ext.data.Connection#request request}({
    form: 'some-form',
    params: 'foo=bar'
});
 * 
*

* @singleton */ Ext.Ajax = new Ext.data.Connection({
/** * @cfg {String} url @hide */
/** * @cfg {Object} extraParams @hide */
/** * @cfg {Object} defaultHeaders @hide */
/** * @cfg {String} method (Optional) @hide */
/** * @cfg {Number} timeout (Optional) @hide */
/** * @cfg {Boolean} autoAbort (Optional) @hide */
/** * @cfg {Boolean} disableCaching (Optional) @hide */
/** * @property disableCaching * True to add a unique cache-buster param to GET requests. (defaults to true) * @type Boolean */
/** * @property url * 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. * @type String */
/** * @property extraParams * 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. * @type Object */
/** * @property defaultHeaders * An object containing request headers which are added to each request made by this object * (defaults to undefined). * @type Object */
/** * @property method * 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".) * @type String */
/** * @property timeout * The timeout in milliseconds to be used for requests. (defaults to 30000) * @type Number */
/** * @property autoAbort * Whether a new request should abort any pending requests. (defaults to false) * @type Boolean */ autoAbort : false,
/** * Serialize the passed form into a url encoded string * @param {String/HTMLElement} form * @return {String} */ serializeForm : function(form){ return Ext.lib.Ajax.serializeForm(form); } });