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9 <pre class="prettyprint lang-js">/*!
10 * Ext JS Library 3.2.1
11 * Copyright(c) 2006-2010 Ext JS, Inc.
13 * http://www.extjs.com/license
15 <div id="cls-Ext.data.HttpProxy"></div>/**
16 * @class Ext.data.HttpProxy
17 * @extends Ext.data.DataProxy
18 * <p>An implementation of {@link Ext.data.DataProxy} that processes data requests within the same
19 * domain of the originating page.</p>
20 * <p><b>Note</b>: this class cannot be used to retrieve data from a domain other
21 * than the domain from which the running page was served. For cross-domain requests, use a
22 * {@link Ext.data.ScriptTagProxy ScriptTagProxy}.</p>
23 * <p>Be aware that to enable the browser to parse an XML document, the server must set
24 * the Content-Type header in the HTTP response to "<tt>text/xml</tt>".</p>
26 * @param {Object} conn
27 * An {@link Ext.data.Connection} object, or options parameter to {@link Ext.Ajax#request}.
28 * <p>Note that if this HttpProxy is being used by a {@link Ext.data.Store Store}, then the
29 * Store's call to {@link #load} will override any specified <tt>callback</tt> and <tt>params</tt>
30 * options. In this case, use the Store's {@link Ext.data.Store#events events} to modify parameters,
31 * or react to loading events. The Store's {@link Ext.data.Store#baseParams baseParams} may also be
32 * used to pass parameters known at instantiation time.</p>
33 * <p>If an options parameter is passed, the singleton {@link Ext.Ajax} object will be used to make
36 Ext.data.HttpProxy = function(conn){
37 Ext.data.HttpProxy.superclass.constructor.call(this, conn);
39 <div id="prop-Ext.data.HttpProxy-conn"></div>/**
40 * The Connection object (Or options parameter to {@link Ext.Ajax#request}) which this HttpProxy
41 * uses to make requests to the server. Properties of this object may be changed dynamically to
42 * change the way data is requested.
47 // nullify the connection url. The url param has been copied to 'this' above. The connection
48 // url will be set during each execution of doRequest when buildUrl is called. This makes it easier for users to override the
49 // connection url during beforeaction events (ie: beforeload, beforewrite, etc).
50 // Url is always re-defined during doRequest.
53 this.useAjax = !conn || !conn.events;
55 // A hash containing active requests, keyed on action [Ext.data.Api.actions.create|read|update|destroy]
56 var actions = Ext.data.Api.actions;
57 this.activeRequest = {};
58 for (var verb in actions) {
59 this.activeRequest[actions[verb]] = undefined;
63 Ext.extend(Ext.data.HttpProxy, Ext.data.DataProxy, {
64 <div id="method-Ext.data.HttpProxy-getConnection"></div>/**
65 * Return the {@link Ext.data.Connection} object being used by this Proxy.
66 * @return {Connection} The Connection object. This object may be used to subscribe to events on
67 * a finer-grained basis than the DataProxy events.
69 getConnection : function() {
70 return this.useAjax ? Ext.Ajax : this.conn;
73 <div id="method-Ext.data.HttpProxy-setUrl"></div>/**
74 * Used for overriding the url used for a single request. Designed to be called during a beforeaction event. Calling setUrl
75 * will override any urls set via the api configuration parameter. Set the optional parameter makePermanent to set the url for
76 * all subsequent requests. If not set to makePermanent, the next request will use the same url or api configuration defined
77 * in the initial proxy configuration.
79 * @param {Boolean} makePermanent (Optional) [false]
81 * (e.g.: beforeload, beforesave, etc).
83 setUrl : function(url, makePermanent) {
85 if (makePermanent === true) {
88 Ext.data.Api.prepare(this);
92 <div id="method-Ext.data.HttpProxy-doRequest"></div>/**
93 * HttpProxy implementation of DataProxy#doRequest
94 * @param {String} action The crud action type (create, read, update, destroy)
95 * @param {Ext.data.Record/Ext.data.Record[]} rs If action is load, rs will be null
96 * @param {Object} params An object containing properties which are to be used as HTTP parameters
97 * for the request to the remote server.
98 * @param {Ext.data.DataReader} reader The Reader object which converts the data
99 * object into a block of Ext.data.Records.
100 * @param {Function} callback
101 * <div class="sub-desc"><p>A function to be called after the request.
102 * The <tt>callback</tt> is passed the following arguments:<ul>
103 * <li><tt>r</tt> : Ext.data.Record[] The block of Ext.data.Records.</li>
104 * <li><tt>options</tt>: Options object from the action request</li>
105 * <li><tt>success</tt>: Boolean success indicator</li></ul></p></div>
106 * @param {Object} scope The scope (<code>this</code> reference) in which the callback function is executed. Defaults to the browser window.
107 * @param {Object} arg An optional argument which is passed to the callback as its second parameter.
110 doRequest : function(action, rs, params, reader, cb, scope, arg) {
112 method: (this.api[action]) ? this.api[action]['method'] : undefined,
119 callback : this.createCallback(action, rs),
123 // If possible, transmit data using jsonData || xmlData on Ext.Ajax.request (An installed DataWriter would have written it there.).
124 // Use std HTTP params otherwise.
125 if (params.jsonData) {
126 o.jsonData = params.jsonData;
127 } else if (params.xmlData) {
128 o.xmlData = params.xmlData;
130 o.params = params || {};
132 // Set the connection url. If this.conn.url is not null here,
133 // the user must have overridden the url during a beforewrite/beforeload event-handler.
134 // this.conn.url is nullified after each request.
135 this.conn.url = this.buildUrl(action, rs);
139 Ext.applyIf(o, this.conn);
141 // If a currently running request is found for this action, abort it.
142 if (this.activeRequest[action]) {
144 // Disabled aborting activeRequest while implementing REST. activeRequest[action] will have to become an array
145 // TODO ideas anyone?
147 //Ext.Ajax.abort(this.activeRequest[action]);
149 this.activeRequest[action] = Ext.Ajax.request(o);
151 this.conn.request(o);
153 // request is sent, nullify the connection url in preparation for the next request
154 this.conn.url = null;
158 * Returns a callback function for a request. Note a special case is made for the
159 * read action vs all the others.
160 * @param {String} action [create|update|delete|load]
161 * @param {Ext.data.Record[]} rs The Store-recordset being acted upon
164 createCallback : function(action, rs) {
165 return function(o, success, response) {
166 this.activeRequest[action] = undefined;
168 if (action === Ext.data.Api.actions.read) {
169 // @deprecated: fire loadexception for backwards compat.
171 this.fireEvent('loadexception', this, o, response);
173 this.fireEvent('exception', this, 'response', action, o, response);
174 o.request.callback.call(o.request.scope, null, o.request.arg, false);
177 if (action === Ext.data.Api.actions.read) {
178 this.onRead(action, o, response);
180 this.onWrite(action, o, response, rs);
185 <div id="method-Ext.data.HttpProxy-onRead"></div>/**
186 * Callback for read action
187 * @param {String} action Action name as per {@link Ext.data.Api.actions#read}.
188 * @param {Object} o The request transaction object
189 * @param {Object} res The server response
190 * @fires loadexception (deprecated)
195 onRead : function(action, o, response) {
198 result = o.reader.read(response);
200 // @deprecated: fire old loadexception for backwards-compat.
202 this.fireEvent('loadexception', this, o, response, e);
204 this.fireEvent('exception', this, 'response', action, o, response, e);
205 o.request.callback.call(o.request.scope, null, o.request.arg, false);
208 if (result.success === false) {
209 // @deprecated: fire old loadexception for backwards-compat.
211 this.fireEvent('loadexception', this, o, response);
213 // Get DataReader read-back a response-object to pass along to exception event
214 var res = o.reader.readResponse(action, response);
215 this.fireEvent('exception', this, 'remote', action, o, res, null);
218 this.fireEvent('load', this, o, o.request.arg);
220 // TODO refactor onRead, onWrite to be more generalized now that we're dealing with Ext.data.Response instance
221 // the calls to request.callback(...) in each will have to be made identical.
222 // NOTE reader.readResponse does not currently return Ext.data.Response
223 o.request.callback.call(o.request.scope, result, o.request.arg, result.success);
225 <div id="method-Ext.data.HttpProxy-onWrite"></div>/**
226 * Callback for write actions
227 * @param {String} action [Ext.data.Api.actions.create|read|update|destroy]
228 * @param {Object} trans The request transaction object
229 * @param {Object} res The server response
234 onWrite : function(action, o, response, rs) {
235 var reader = o.reader;
238 res = reader.readResponse(action, response);
240 this.fireEvent('exception', this, 'response', action, o, response, e);
241 o.request.callback.call(o.request.scope, null, o.request.arg, false);
244 if (res.success === true) {
245 this.fireEvent('write', this, action, res.data, res, rs, o.request.arg);
247 this.fireEvent('exception', this, 'remote', action, o, res, rs);
249 // TODO refactor onRead, onWrite to be more generalized now that we're dealing with Ext.data.Response instance
250 // the calls to request.callback(...) in each will have to be made similar.
251 // NOTE reader.readResponse does not currently return Ext.data.Response
252 o.request.callback.call(o.request.scope, res.data, res, res.success);
259 }else if(this.activeRequest){
260 var actions = Ext.data.Api.actions;
261 for (var verb in actions) {
262 if(this.activeRequest[actions[verb]]){
263 Ext.Ajax.abort(this.activeRequest[actions[verb]]);
267 Ext.data.HttpProxy.superclass.destroy.call(this);