-/*!
- * Ext JS Library 3.3.0
- * Copyright(c) 2006-2010 Ext JS, Inc.
- * licensing@extjs.com
- * http://www.extjs.com/license
- */
-/**
- * @class Ext.data.HttpProxy
- * @extends Ext.data.DataProxy
- * <p>An implementation of {@link Ext.data.DataProxy} that processes data requests within the same
- * domain of the originating page.</p>
- * <p><b>Note</b>: this class cannot be used to retrieve data from a domain other
- * than the domain from which the running page was served. For cross-domain requests, use a
- * {@link Ext.data.ScriptTagProxy ScriptTagProxy}.</p>
- * <p>Be aware that to enable the browser to parse an XML document, the server must set
- * the Content-Type header in the HTTP response to "<tt>text/xml</tt>".</p>
- * @constructor
- * @param {Object} conn
- * An {@link Ext.data.Connection} object, or options parameter to {@link Ext.Ajax#request}.
- * <p>Note that if this HttpProxy is being used by a {@link Ext.data.Store Store}, then the
- * Store's call to {@link #load} will override any specified <tt>callback</tt> and <tt>params</tt>
- * options. In this case, use the Store's {@link Ext.data.Store#events events} to modify parameters,
- * or react to loading events. The Store's {@link Ext.data.Store#baseParams baseParams} may also be
- * used to pass parameters known at instantiation time.</p>
- * <p>If an options parameter is passed, the singleton {@link Ext.Ajax} object will be used to make
- * the request.</p>
- */
-Ext.data.HttpProxy = function(conn){
- Ext.data.HttpProxy.superclass.constructor.call(this, conn);
-
- /**
- * The Connection object (Or options parameter to {@link Ext.Ajax#request}) which this HttpProxy
- * uses to make requests to the server. Properties of this object may be changed dynamically to
- * change the way data is requested.
- * @property
- */
- this.conn = conn;
-
- // nullify the connection url. The url param has been copied to 'this' above. The connection
- // url will be set during each execution of doRequest when buildUrl is called. This makes it easier for users to override the
- // connection url during beforeaction events (ie: beforeload, beforewrite, etc).
- // Url is always re-defined during doRequest.
- this.conn.url = null;
-
- this.useAjax = !conn || !conn.events;
-
- // A hash containing active requests, keyed on action [Ext.data.Api.actions.create|read|update|destroy]
- var actions = Ext.data.Api.actions;
- this.activeRequest = {};
- for (var verb in actions) {
- this.activeRequest[actions[verb]] = undefined;
- }
-};
-
-Ext.extend(Ext.data.HttpProxy, Ext.data.DataProxy, {
- /**
- * Return the {@link Ext.data.Connection} object being used by this Proxy.
- * @return {Connection} The Connection object. This object may be used to subscribe to events on
- * a finer-grained basis than the DataProxy events.
- */
- getConnection : function() {
- return this.useAjax ? Ext.Ajax : this.conn;
- },
-
- /**
- * Used for overriding the url used for a single request. Designed to be called during a beforeaction event. Calling setUrl
- * will override any urls set via the api configuration parameter. Set the optional parameter makePermanent to set the url for
- * all subsequent requests. If not set to makePermanent, the next request will use the same url or api configuration defined
- * in the initial proxy configuration.
- * @param {String} url
- * @param {Boolean} makePermanent (Optional) [false]
- *
- * (e.g.: beforeload, beforesave, etc).
- */
- setUrl : function(url, makePermanent) {
- this.conn.url = url;
- if (makePermanent === true) {
- this.url = url;
- this.api = null;
- Ext.data.Api.prepare(this);
- }
- },
-
- /**
- * HttpProxy implementation of DataProxy#doRequest
- * @param {String} action The crud action type (create, read, update, destroy)
- * @param {Ext.data.Record/Ext.data.Record[]} rs If action is load, rs will be null
- * @param {Object} params An object containing properties which are to be used as HTTP parameters
- * for the request to the remote server.
- * @param {Ext.data.DataReader} reader The Reader object which converts the data
- * object into a block of Ext.data.Records.
- * @param {Function} callback
- * <div class="sub-desc"><p>A function to be called after the request.
- * The <tt>callback</tt> is passed the following arguments:<ul>
- * <li><tt>r</tt> : Ext.data.Record[] The block of Ext.data.Records.</li>
- * <li><tt>options</tt>: Options object from the action request</li>
- * <li><tt>success</tt>: Boolean success indicator</li></ul></p></div>
- * @param {Object} scope The scope (<code>this</code> reference) in which the callback function is executed. Defaults to the browser window.
- * @param {Object} arg An optional argument which is passed to the callback as its second parameter.
- * @protected
- */
- doRequest : function(action, rs, params, reader, cb, scope, arg) {
- var o = {
- method: (this.api[action]) ? this.api[action]['method'] : undefined,
- request: {
- callback : cb,
- scope : scope,
- arg : arg
- },
- reader: reader,
- callback : this.createCallback(action, rs),
- scope: this
- };
-
- // If possible, transmit data using jsonData || xmlData on Ext.Ajax.request (An installed DataWriter would have written it there.).
- // Use std HTTP params otherwise.
- if (params.jsonData) {
- o.jsonData = params.jsonData;
- } else if (params.xmlData) {
- o.xmlData = params.xmlData;
- } else {
- o.params = params || {};
- }
- // Set the connection url. If this.conn.url is not null here,
- // the user must have overridden the url during a beforewrite/beforeload event-handler.
- // this.conn.url is nullified after each request.
- this.conn.url = this.buildUrl(action, rs);
-
- if(this.useAjax){
-
- Ext.applyIf(o, this.conn);
-
- // If a currently running request is found for this action, abort it.
- if (this.activeRequest[action]) {
- ////
- // Disabled aborting activeRequest while implementing REST. activeRequest[action] will have to become an array
- // TODO ideas anyone?
- //
- //Ext.Ajax.abort(this.activeRequest[action]);
- }
- this.activeRequest[action] = Ext.Ajax.request(o);
- }else{
- this.conn.request(o);
- }
- // request is sent, nullify the connection url in preparation for the next request
- this.conn.url = null;
- },
-
- /**
- * Returns a callback function for a request. Note a special case is made for the
- * read action vs all the others.
- * @param {String} action [create|update|delete|load]
- * @param {Ext.data.Record[]} rs The Store-recordset being acted upon
- * @private
- */
- createCallback : function(action, rs) {
- return function(o, success, response) {
- this.activeRequest[action] = undefined;
- if (!success) {
- if (action === Ext.data.Api.actions.read) {
- // @deprecated: fire loadexception for backwards compat.
- // TODO remove
- this.fireEvent('loadexception', this, o, response);
- }
- this.fireEvent('exception', this, 'response', action, o, response);
- o.request.callback.call(o.request.scope, null, o.request.arg, false);
- return;
- }
- if (action === Ext.data.Api.actions.read) {
- this.onRead(action, o, response);
- } else {
- this.onWrite(action, o, response, rs);
- }
- };
- },
-
- /**
- * Callback for read action
- * @param {String} action Action name as per {@link Ext.data.Api.actions#read}.
- * @param {Object} o The request transaction object
- * @param {Object} res The server response
- * @fires loadexception (deprecated)
- * @fires exception
- * @fires load
- * @protected
- */
- onRead : function(action, o, response) {
- var result;
- try {
- result = o.reader.read(response);
- }catch(e){
- // @deprecated: fire old loadexception for backwards-compat.
- // TODO remove
- this.fireEvent('loadexception', this, o, response, e);
-
- this.fireEvent('exception', this, 'response', action, o, response, e);
- o.request.callback.call(o.request.scope, null, o.request.arg, false);
- return;
- }
- if (result.success === false) {
- // @deprecated: fire old loadexception for backwards-compat.
- // TODO remove
- this.fireEvent('loadexception', this, o, response);
-
- // Get DataReader read-back a response-object to pass along to exception event
- var res = o.reader.readResponse(action, response);
- this.fireEvent('exception', this, 'remote', action, o, res, null);
- }
- else {
- this.fireEvent('load', this, o, o.request.arg);
- }
- // TODO refactor onRead, onWrite to be more generalized now that we're dealing with Ext.data.Response instance
- // the calls to request.callback(...) in each will have to be made identical.
- // NOTE reader.readResponse does not currently return Ext.data.Response
- o.request.callback.call(o.request.scope, result, o.request.arg, result.success);
- },
- /**
- * Callback for write actions
- * @param {String} action [Ext.data.Api.actions.create|read|update|destroy]
- * @param {Object} trans The request transaction object
- * @param {Object} res The server response
- * @fires exception
- * @fires write
- * @protected
- */
- onWrite : function(action, o, response, rs) {
- var reader = o.reader;
- var res;
- try {
- res = reader.readResponse(action, response);
- } catch (e) {
- this.fireEvent('exception', this, 'response', action, o, response, e);
- o.request.callback.call(o.request.scope, null, o.request.arg, false);
- return;
- }
- if (res.success === true) {
- this.fireEvent('write', this, action, res.data, res, rs, o.request.arg);
- } else {
- this.fireEvent('exception', this, 'remote', action, o, res, rs);
- }
- // TODO refactor onRead, onWrite to be more generalized now that we're dealing with Ext.data.Response instance
- // the calls to request.callback(...) in each will have to be made similar.
- // NOTE reader.readResponse does not currently return Ext.data.Response
- o.request.callback.call(o.request.scope, res.data, res, res.success);
- },
-
- // inherit docs
- destroy: function(){
- if(!this.useAjax){
- this.conn.abort();
- }else if(this.activeRequest){
- var actions = Ext.data.Api.actions;
- for (var verb in actions) {
- if(this.activeRequest[actions[verb]]){
- Ext.Ajax.abort(this.activeRequest[actions[verb]]);
- }
- }
- }
- Ext.data.HttpProxy.superclass.destroy.call(this);
- }
-});
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