(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 "<", "&" as "&" 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);
- };
-
- 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: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.
- *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 = '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'
-});
- * /** + * 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 <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 `<`, `&` as + * `&` 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 + }; + } +}); ++ +