X-Git-Url: http://git.ithinksw.org/extjs.git/blobdiff_plain/c930e9176a5a85509c5b0230e2bff5c22a591432..refs/heads/master:/docs/source/Connection.html diff --git a/docs/source/Connection.html b/docs/source/Connection.html index fc4beaa0..6f9befb2 100644 --- a/docs/source/Connection.html +++ b/docs/source/Connection.html @@ -1,579 +1,928 @@ - - - The source code - - - - -
(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); - } -}); -
- - \ No newline at end of file + + + + + The source code + + + + + + +
/**
+ * The Connection 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 &lt;form&gt; element temporarily modified to have its
+ * target set to refer to a dynamically generated, hidden &lt;iframe&gt; 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.
+ *
+ * Also note that it's not possible to check the response code of the hidden iframe, so the success handler will ALWAYS fire.
+ */
+Ext.define('Ext.data.Connection', {
+    mixins: {
+        observable: 'Ext.util.Observable'
+    },
+
+    statics: {
+        requestId: 0
+    },
+
+    url: null,
+    async: true,
+    method: null,
+    username: '',
+    password: '',
+
+    /**
+     * @cfg {Boolean} disableCaching
+     * True to add a unique cache-buster param to GET requests.
+     */
+    disableCaching: true,
+
+    /**
+     * @cfg {Boolean} withCredentials
+     * True to set `withCredentials = true` on the XHR object
+     */
+    withCredentials: false,
+
+    /**
+     * @cfg {Boolean} cors
+     * True to enable CORS support on the XHR object. Currently the only effect of this option
+     * is to use the XDomainRequest object instead of XMLHttpRequest if the browser is IE8 or above.
+     */
+    cors: false,
+
+    /**
+     * @cfg {String} disableCachingParam
+     * Change the parameter which is sent went disabling caching through a cache buster.
+     */
+    disableCachingParam: '_dc',
+
+    /**
+     * @cfg {Number} timeout
+     * The timeout in milliseconds to be used for requests.
+     */
+    timeout : 30000,
+
+    /**
+     * @cfg {Object} extraParams
+     * Any parameters to be appended to the request.
+     */
+
+    useDefaultHeader : true,
+    defaultPostHeader : 'application/x-www-form-urlencoded; charset=UTF-8',
+    useDefaultXhrHeader : true,
+    defaultXhrHeader : 'XMLHttpRequest',
+
+    constructor : function(config) {
+        config = config || {};
+        Ext.apply(this, config);
+
+        this.addEvents(
+            /**
+             * @event beforerequest
+             * Fires before a network request is made to retrieve a data object.
+             * @param {Ext.data.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 {Ext.data.Connection} conn This Connection object.
+             * @param {Object} response The XHR object containing the response data.
+             * See [The XMLHttpRequest Object](http://www.w3.org/TR/XMLHttpRequest/) 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](http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html)
+             * for details of HTTP status codes.
+             * @param {Ext.data.Connection} conn This Connection object.
+             * @param {Object} response The XHR object containing the response data.
+             * See [The XMLHttpRequest Object](http://www.w3.org/TR/XMLHttpRequest/) for details.
+             * @param {Object} options The options config object passed to the {@link #request} method.
+             */
+            'requestexception'
+        );
+        this.requests = {};
+        this.mixins.observable.constructor.call(this);
+    },
+
+    /**
+     * 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.)
+     *
+     * @param {String/Function} options.url 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`.
+     *
+     * @param {Object/String/Function} options.params 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.
+     *
+     * @param {String} options.method 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.
+     *
+     * @param {Function} options.callback 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:
+     * @param {Object} options.callback.options The parameter to the request call.
+     * @param {Boolean} options.callback.success True if the request succeeded.
+     * @param {Object} options.callback.response The XMLHttpRequest object containing the response data.
+     * See [www.w3.org/TR/XMLHttpRequest/](http://www.w3.org/TR/XMLHttpRequest/) for details about
+     * accessing elements of the response.
+     *
+     * @param {Function} options.success The function to be called upon success of the request.
+     * The callback is passed the following parameters:
+     * @param {Object} options.success.response The XMLHttpRequest object containing the response data.
+     * @param {Object} options.success.options The parameter to the request call.
+     *
+     * @param {Function} options.failure The function to be called upon success of the request.
+     * The callback is passed the following parameters:
+     * @param {Object} options.failure.response The XMLHttpRequest object containing the response data.
+     * @param {Object} options.failure.options The parameter to the request call.
+     *
+     * @param {Object} options.scope 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.
+     *
+     * @param {Number} options.timeout The timeout in milliseconds to be used for this request.
+     * Defaults to 30 seconds.
+     *
+     * @param {Ext.Element/HTMLElement/String} options.form The `<form>` Element or the id of the `<form>`
+     * to pull parameters from.
+     *
+     * @param {Boolean} options.isUpload **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.
+     *
+     * [target]: http://www.w3.org/TR/REC-html40/present/frames.html#adef-target
+     * [Content-Type]: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17
+     * [multipart/form]: http://www.faqs.org/rfcs/rfc2388.html
+     *
+     * @param {Object} options.headers Request headers to set for the request.
+     *
+     * @param {Object} options.xmlData 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.
+     *
+     * @param {Object/String} options.jsonData 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.
+     *
+     * @param {Boolean} options.disableCaching True to add a unique cache-buster param to GET requests.
+     *
+     * @param {Boolean} options.withCredentials True to add the withCredentials property to the XHR object
+     *
+     * @return {Object} The request object. This may be used to cancel the request.
+     */
+    request : function(options) {
+        options = options || {};
+        var me = this,
+            scope = options.scope || window,
+            username = options.username || me.username,
+            password = options.password || me.password || '',
+            async,
+            requestOptions,
+            request,
+            headers,
+            xhr;
+
+        if (me.fireEvent('beforerequest', me, options) !== false) {
+
+            requestOptions = me.setOptions(options, scope);
+
+            if (this.isFormUpload(options) === true) {
+                this.upload(options.form, requestOptions.url, requestOptions.data, options);
+                return null;
+            }
+
+            // if autoabort is set, cancel the current transactions
+            if (options.autoAbort === true || me.autoAbort) {
+                me.abort();
+            }
+
+            // create a connection object
+
+            if ((options.cors === true || me.cors === true) && Ext.isIE && Ext.ieVersion >= 8) {
+                xhr = new XDomainRequest();
+            } else {
+                xhr = this.getXhrInstance();
+            }
+
+            async = options.async !== false ? (options.async || me.async) : false;
+
+            // open the request
+            if (username) {
+                xhr.open(requestOptions.method, requestOptions.url, async, username, password);
+            } else {
+                xhr.open(requestOptions.method, requestOptions.url, async);
+            }
+
+            if (options.withCredentials === true || me.withCredentials === true) {
+                xhr.withCredentials = true;
+            }
+
+            headers = me.setupHeaders(xhr, options, requestOptions.data, requestOptions.params);
+
+            // create the transaction object
+            request = {
+                id: ++Ext.data.Connection.requestId,
+                xhr: xhr,
+                headers: headers,
+                options: options,
+                async: async,
+                timeout: setTimeout(function() {
+                    request.timedout = true;
+                    me.abort(request);
+                }, options.timeout || me.timeout)
+            };
+            me.requests[request.id] = request;
+            me.latestId = request.id;
+            // bind our statechange listener
+            if (async) {
+                xhr.onreadystatechange = Ext.Function.bind(me.onStateChange, me, [request]);
+            }
+
+            if ((options.cors === true || me.cors === true) && Ext.isIE && Ext.ieVersion >= 8) {
+                xhr.onload = function() {
+                    me.onComplete(request);
+                }
+            }
+
+            // start the request!
+            xhr.send(requestOptions.data);
+            if (!async) {
+                return this.onComplete(request);
+            }
+            return request;
+        } else {
+            Ext.callback(options.callback, options.scope, [options, undefined, undefined]);
+            return null;
+        }
+    },
+
+    /**
+     * Uploads a form using a hidden iframe.
+     * @param {String/HTMLElement/Ext.Element} form The form to upload
+     * @param {String} url The url to post to
+     * @param {String} params Any extra parameters to pass
+     * @param {Object} options The initial options
+     */
+    upload: function(form, url, params, options) {
+        form = Ext.getDom(form);
+        options = options || {};
+
+        var id = Ext.id(),
+                frame = document.createElement('iframe'),
+                hiddens = [],
+                encoding = 'multipart/form-data',
+                buf = {
+                    target: form.target,
+                    method: form.method,
+                    encoding: form.encoding,
+                    enctype: form.enctype,
+                    action: form.action
+                }, hiddenItem;
+
+        /*
+         * Originally this behaviour was modified for Opera 10 to apply the secure URL after
+         * the frame had been added to the document. It seems this has since been corrected in
+         * Opera so the behaviour has been reverted, the URL will be set before being added.
+         */
+        Ext.fly(frame).set({
+            id: id,
+            name: id,
+            cls: Ext.baseCSSPrefix + 'hide-display',
+            src: Ext.SSL_SECURE_URL
+        });
+
+        document.body.appendChild(frame);
+
+        // This is required so that IE doesn't pop the response up in a new window.
+        if (document.frames) {
+           document.frames[id].name = id;
+        }
+
+        Ext.fly(form).set({
+            target: id,
+            method: 'POST',
+            enctype: encoding,
+            encoding: encoding,
+            action: url || buf.action
+        });
+
+        // add dynamic params
+        if (params) {
+            Ext.iterate(Ext.Object.fromQueryString(params), function(name, value){
+                hiddenItem = document.createElement('input');
+                Ext.fly(hiddenItem).set({
+                    type: 'hidden',
+                    value: value,
+                    name: name
+                });
+                form.appendChild(hiddenItem);
+                hiddens.push(hiddenItem);
+            });
+        }
+
+        Ext.fly(frame).on('load', Ext.Function.bind(this.onUploadComplete, this, [frame, options]), null, {single: true});
+        form.submit();
+
+        Ext.fly(form).set(buf);
+        Ext.each(hiddens, function(h) {
+            Ext.removeNode(h);
+        });
+    },
+
+    /**
+     * @private
+     * Callback handler for the upload function. After we've submitted the form via the iframe this creates a bogus
+     * response object to simulate an XHR and populates its responseText from the now-loaded iframe's document body
+     * (or a textarea inside the body). We then clean up by removing the iframe
+     */
+    onUploadComplete: function(frame, options) {
+        var me = this,
+            // bogus response object
+            response = {
+                responseText: '',
+                responseXML: null
+            }, doc, firstChild;
+
+        try {
+            doc = frame.contentWindow.document || frame.contentDocument || window.frames[frame.id].document;
+            if (doc) {
+                if (doc.body) {
+                    if (/textarea/i.test((firstChild = doc.body.firstChild || {}).tagName)) { // json response wrapped in textarea
+                        response.responseText = firstChild.value;
+                    } else {
+                        response.responseText = doc.body.innerHTML;
+                    }
+                }
+                //in IE the document may still have a body even if returns XML.
+                response.responseXML = doc.XMLDocument || doc;
+            }
+        } catch (e) {
+        }
+
+        me.fireEvent('requestcomplete', me, response, options);
+
+        Ext.callback(options.success, options.scope, [response, options]);
+        Ext.callback(options.callback, options.scope, [options, true, response]);
+
+        setTimeout(function(){
+            Ext.removeNode(frame);
+        }, 100);
+    },
+
+    /**
+     * Detects whether the form is intended to be used for an upload.
+     * @private
+     */
+    isFormUpload: function(options){
+        var form = this.getForm(options);
+        if (form) {
+            return (options.isUpload || (/multipart\/form-data/i).test(form.getAttribute('enctype')));
+        }
+        return false;
+    },
+
+    /**
+     * Gets the form object from options.
+     * @private
+     * @param {Object} options The request options
+     * @return {HTMLElement} The form, null if not passed
+     */
+    getForm: function(options){
+        return Ext.getDom(options.form) || null;
+    },
+
+    /**
+     * Sets various options such as the url, params for the request
+     * @param {Object} options The initial options
+     * @param {Object} scope The scope to execute in
+     * @return {Object} The params for the request
+     */
+    setOptions: function(options, scope){
+        var me =  this,
+            params = options.params || {},
+            extraParams = me.extraParams,
+            urlParams = options.urlParams,
+            url = options.url || me.url,
+            jsonData = options.jsonData,
+            method,
+            disableCache,
+            data;
+
+
+        // allow params to be a method that returns the params object
+        if (Ext.isFunction(params)) {
+            params = params.call(scope, options);
+        }
+
+        // allow url to be a method that returns the actual url
+        if (Ext.isFunction(url)) {
+            url = url.call(scope, options);
+        }
+
+        url = this.setupUrl(options, url);
+
+        //<debug>
+        if (!url) {
+            Ext.Error.raise({
+                options: options,
+                msg: 'No URL specified'
+            });
+        }
+        //</debug>
+
+        // check for xml or json data, and make sure json data is encoded
+        data = options.rawData || options.xmlData || jsonData || null;
+        if (jsonData && !Ext.isPrimitive(jsonData)) {
+            data = Ext.encode(data);
+        }
+
+        // make sure params are a url encoded string and include any extraParams if specified
+        if (Ext.isObject(params)) {
+            params = Ext.Object.toQueryString(params);
+        }
+
+        if (Ext.isObject(extraParams)) {
+            extraParams = Ext.Object.toQueryString(extraParams);
+        }
+
+        params = params + ((extraParams) ? ((params) ? '&' : '') + extraParams : '');
+
+        urlParams = Ext.isObject(urlParams) ? Ext.Object.toQueryString(urlParams) : urlParams;
+
+        params = this.setupParams(options, params);
+
+        // decide the proper method for this request
+        method = (options.method || me.method || ((params || data) ? 'POST' : 'GET')).toUpperCase();
+        this.setupMethod(options, method);
+
+
+        disableCache = options.disableCaching !== false ? (options.disableCaching || me.disableCaching) : false;
+        // if the method is get append date to prevent caching
+        if (method === 'GET' && disableCache) {
+            url = Ext.urlAppend(url, (options.disableCachingParam || me.disableCachingParam) + '=' + (new Date().getTime()));
+        }
+
+        // if the method is get or there is json/xml data append the params to the url
+        if ((method == 'GET' || data) && params) {
+            url = Ext.urlAppend(url, params);
+            params = null;
+        }
+
+        // allow params to be forced into the url
+        if (urlParams) {
+            url = Ext.urlAppend(url, urlParams);
+        }
+
+        return {
+            url: url,
+            method: method,
+            data: data || params || null
+        };
+    },
+
+    /**
+     * Template method for overriding url
+     * @template
+     * @private
+     * @param {Object} options
+     * @param {String} url
+     * @return {String} The modified url
+     */
+    setupUrl: function(options, url){
+        var form = this.getForm(options);
+        if (form) {
+            url = url || form.action;
+        }
+        return url;
+    },
+
+
+    /**
+     * Template method for overriding params
+     * @template
+     * @private
+     * @param {Object} options
+     * @param {String} params
+     * @return {String} The modified params
+     */
+    setupParams: function(options, params) {
+        var form = this.getForm(options),
+            serializedForm;
+        if (form && !this.isFormUpload(options)) {
+            serializedForm = Ext.Element.serializeForm(form);
+            params = params ? (params + '&' + serializedForm) : serializedForm;
+        }
+        return params;
+    },
+
+    /**
+     * Template method for overriding method
+     * @template
+     * @private
+     * @param {Object} options
+     * @param {String} method
+     * @return {String} The modified method
+     */
+    setupMethod: function(options, method){
+        if (this.isFormUpload(options)) {
+            return 'POST';
+        }
+        return method;
+    },
+
+    /**
+     * Setup all the headers for the request
+     * @private
+     * @param {Object} xhr The xhr object
+     * @param {Object} options The options for the request
+     * @param {Object} data The data for the request
+     * @param {Object} params The params for the request
+     */
+    setupHeaders: function(xhr, options, data, params){
+        var me = this,
+            headers = Ext.apply({}, options.headers || {}, me.defaultHeaders || {}),
+            contentType = me.defaultPostHeader,
+            jsonData = options.jsonData,
+            xmlData = options.xmlData,
+            key,
+            header;
+
+        if (!headers['Content-Type'] && (data || params)) {
+            if (data) {
+                if (options.rawData) {
+                    contentType = 'text/plain';
+                } else {
+                    if (xmlData && Ext.isDefined(xmlData)) {
+                        contentType = 'text/xml';
+                    } else if (jsonData && Ext.isDefined(jsonData)) {
+                        contentType = 'application/json';
+                    }
+                }
+            }
+            headers['Content-Type'] = contentType;
+        }
+
+        if (me.useDefaultXhrHeader && !headers['X-Requested-With']) {
+            headers['X-Requested-With'] = me.defaultXhrHeader;
+        }
+        // set up all the request headers on the xhr object
+        try{
+            for (key in headers) {
+                if (headers.hasOwnProperty(key)) {
+                    header = headers[key];
+                    xhr.setRequestHeader(key, header);
+                }
+
+            }
+        } catch(e) {
+            me.fireEvent('exception', key, header);
+        }
+        return headers;
+    },
+
+    /**
+     * Creates the appropriate XHR transport for the browser.
+     * @private
+     */
+    getXhrInstance: (function(){
+        var options = [function(){
+            return new XMLHttpRequest();
+        }, function(){
+            return new ActiveXObject('MSXML2.XMLHTTP.3.0');
+        }, function(){
+            return new ActiveXObject('MSXML2.XMLHTTP');
+        }, function(){
+            return new ActiveXObject('Microsoft.XMLHTTP');
+        }], i = 0,
+            len = options.length,
+            xhr;
+
+        for(; i < len; ++i) {
+            try{
+                xhr = options[i];
+                xhr();
+                break;
+            }catch(e){}
+        }
+        return xhr;
+    })(),
+
+    /**
+     * Determines whether this object has a request outstanding.
+     * @param {Object} [request] Defaults to the last transaction
+     * @return {Boolean} True if there is an outstanding request.
+     */
+    isLoading : function(request) {
+        if (!request) {
+            request = this.getLatest();
+        }
+        if (!(request && request.xhr)) {
+            return false;
+        }
+        // if there is a connection and readyState is not 0 or 4
+        var state = request.xhr.readyState;
+        return !(state === 0 || state == 4);
+    },
+
+    /**
+     * Aborts an active request.
+     * @param {Object} [request] Defaults to the last request
+     */
+    abort : function(request) {
+        var me = this;
+
+        if (!request) {
+            request = me.getLatest();
+        }
+
+        if (request && me.isLoading(request)) {
+            /*
+             * Clear out the onreadystatechange here, this allows us
+             * greater control, the browser may/may not fire the function
+             * depending on a series of conditions.
+             */
+            request.xhr.onreadystatechange = null;
+            request.xhr.abort();
+            me.clearTimeout(request);
+            if (!request.timedout) {
+                request.aborted = true;
+            }
+            me.onComplete(request);
+            me.cleanup(request);
+        }
+    },
+
+    /**
+     * Aborts all active requests
+     */
+    abortAll: function(){
+        var requests = this.requests,
+            id;
+
+        for (id in requests) {
+            if (requests.hasOwnProperty(id)) {
+                this.abort(requests[id]);
+            }
+        }
+    },
+
+    /**
+     * Gets the most recent request
+     * @private
+     * @return {Object} The request. Null if there is no recent request
+     */
+    getLatest: function(){
+        var id = this.latestId,
+            request;
+
+        if (id) {
+            request = this.requests[id];
+        }
+        return request || null;
+    },
+
+    /**
+     * Fires when the state of the xhr changes
+     * @private
+     * @param {Object} request The request
+     */
+    onStateChange : function(request) {
+        if (request.xhr.readyState == 4) {
+            this.clearTimeout(request);
+            this.onComplete(request);
+            this.cleanup(request);
+        }
+    },
+
+    /**
+     * Clears the timeout on the request
+     * @private
+     * @param {Object} The request
+     */
+    clearTimeout: function(request){
+        clearTimeout(request.timeout);
+        delete request.timeout;
+    },
+
+    /**
+     * Cleans up any left over information from the request
+     * @private
+     * @param {Object} The request
+     */
+    cleanup: function(request){
+        request.xhr = null;
+        delete request.xhr;
+    },
+
+    /**
+     * To be called when the request has come back from the server
+     * @private
+     * @param {Object} request
+     * @return {Object} The response
+     */
+    onComplete : function(request) {
+        var me = this,
+            options = request.options,
+            result,
+            success,
+            response;
+
+        try {
+            result = me.parseStatus(request.xhr.status);
+        } catch (e) {
+            // in some browsers we can't access the status if the readyState is not 4, so the request has failed
+            result = {
+                success : false,
+                isException : false
+            };
+        }
+        success = result.success;
+
+        if (success) {
+            response = me.createResponse(request);
+            me.fireEvent('requestcomplete', me, response, options);
+            Ext.callback(options.success, options.scope, [response, options]);
+        } else {
+            if (result.isException || request.aborted || request.timedout) {
+                response = me.createException(request);
+            } else {
+                response = me.createResponse(request);
+            }
+            me.fireEvent('requestexception', me, response, options);
+            Ext.callback(options.failure, options.scope, [response, options]);
+        }
+        Ext.callback(options.callback, options.scope, [options, success, response]);
+        delete me.requests[request.id];
+        return response;
+    },
+
+    /**
+     * Checks if the response status was successful
+     * @param {Number} status The status code
+     * @return {Object} An object containing success/status state
+     */
+    parseStatus: function(status) {
+        // see: https://prototype.lighthouseapp.com/projects/8886/tickets/129-ie-mangles-http-response-status-code-204-to-1223
+        status = status == 1223 ? 204 : status;
+
+        var success = (status >= 200 && status < 300) || status == 304,
+            isException = false;
+
+        if (!success) {
+            switch (status) {
+                case 12002:
+                case 12029:
+                case 12030:
+                case 12031:
+                case 12152:
+                case 13030:
+                    isException = true;
+                    break;
+            }
+        }
+        return {
+            success: success,
+            isException: isException
+        };
+    },
+
+    /**
+     * Creates the response object
+     * @private
+     * @param {Object} request
+     */
+    createResponse : function(request) {
+        var xhr = request.xhr,
+            headers = {},
+            lines = xhr.getAllResponseHeaders ? xhr.getAllResponseHeaders().replace(/\r\n/g, '\n').split('\n') : [],
+            count = lines.length,
+            line, index, key, value, response;
+
+        while (count--) {
+            line = lines[count];
+            index = line.indexOf(':');
+            if(index >= 0) {
+                key = line.substr(0, index).toLowerCase();
+                if (line.charAt(index + 1) == ' ') {
+                    ++index;
+                }
+                headers[key] = line.substr(index + 1);
+            }
+        }
+
+        request.xhr = null;
+        delete request.xhr;
+
+        response = {
+            request: request,
+            requestId : request.id,
+            status : xhr.status,
+            statusText : xhr.statusText,
+            getResponseHeader : function(header){ return headers[header.toLowerCase()]; },
+            getAllResponseHeaders : function(){ return headers; },
+            responseText : xhr.responseText,
+            responseXML : xhr.responseXML
+        };
+
+        // If we don't explicitly tear down the xhr reference, IE6/IE7 will hold this in the closure of the
+        // functions created with getResponseHeader/getAllResponseHeaders
+        xhr = null;
+        return response;
+    },
+
+    /**
+     * Creates the exception object
+     * @private
+     * @param {Object} request
+     */
+    createException : function(request) {
+        return {
+            request : request,
+            requestId : request.id,
+            status : request.aborted ? -1 : 0,
+            statusText : request.aborted ? 'transaction aborted' : 'communication failure',
+            aborted: request.aborted,
+            timedout: request.timedout
+        };
+    }
+});
+
+ +