/*
+ * Based on:
+ * Ext JS Library 1.1.1
+ * Copyright(c) 2006-2007, Ext JS, LLC.
+ *
+ * Originally Released Under LGPL - original licence link has changed is not relivant.
+ *
+ * Fork - LGPL
+ * <script type="text/javascript">
+ */
+/**
+ * @class Roo.data.HttpProxy
+ * @extends Roo.data.DataProxy
+ * An implementation of {@link Roo.data.DataProxy} that reads a data object from an {@link Roo.data.Connection} object
+ * configured to reference a certain URL.<br><br>
+ * <p>
+ * <em>Note that this class cannot be used to retrieve data from a domain other than the domain
+ * from which the running page was served.<br><br>
+ * <p>
+ * For cross-domain access to remote data, use an {@link Roo.data.ScriptTagProxy}.</em><br><br>
+ * <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 "text/xml".
+ * @constructor
+ * @param {Object} conn Connection config options to add to each request (e.g. {url: 'foo.php'} or
+ * an {@link Roo.data.Connection} object. If a Connection config is passed, the singleton {@link Roo.Ajax} object
+ * will be used to make the request.
+ */
+Roo.data.HttpProxy = function(conn){
+ Roo.data.HttpProxy.superclass.constructor.call(this);
+ // is conn a conn config or a real conn?
+ this.conn = conn;
+ this.useAjax = !conn || !conn.events;
+
+};
+
+Roo.extend(Roo.data.HttpProxy, Roo.data.DataProxy, {
+ // thse are take from connection...
+
+ /**
+ * @cfg {String} url (Optional) The default URL to be used for requests to the server. (defaults to undefined)
+ */
+ /**
+ * @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 parms are present will use POST, otherwise GET)
+ */
+ /**
+ * @cfg {Number} timeout (Optional) The timeout in milliseconds to be used for requests. (defaults to 30000)
+ */
+ /**
+ * @cfg {Boolean} autoAbort (Optional) Whether this request should abort any pending requests. (defaults to false)
+ * @type Boolean
+ */
+
+
+ /**
+ * @cfg {Boolean} disableCaching (Optional) True to add a unique cache-buster param to GET requests. (defaults to true)
+ * @type Boolean
+ */
+ /**
+ * Return the {@link Roo.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 ? Roo.Ajax : this.conn;
+ },
+
+ /**
+ * Load data from the configured {@link Roo.data.Connection}, read the data object into
+ * a block of Roo.data.Records using the passed {@link Roo.data.DataReader} implementation, and
+ * process that block using the passed callback.
+ * @param {Object} params An object containing properties which are to be used as HTTP parameters
+ * for the request to the remote server.
+ * @param {Roo.data.DataReader} reader The Reader object which converts the data
+ * object into a block of Roo.data.Records.
+ * @param {Function} callback The function into which to pass the block of Roo.data.Records.
+ * The function must be passed <ul>
+ * <li>The Record block object</li>
+ * <li>The "arg" argument from the load function</li>
+ * <li>A boolean success indicator</li>
+ * </ul>
+ * @param {Object} scope The scope in which to call the callback
+ * @param {Object} arg An optional argument which is passed to the callback as its second parameter.
+ */
+ load : function(params, reader, callback, scope, arg){
+ if(this.fireEvent("beforeload", this, params) !== false){
+ var o = {
+ params : params || {},
+ request: {
+ callback : callback,
+ scope : scope,
+ arg : arg
+ },
+ reader: reader,
+ callback : this.loadResponse,
+ scope: this
+ };
+ if(this.useAjax){
+ Roo.applyIf(o, this.conn);
+ if(this.activeRequest){
+ Roo.Ajax.abort(this.activeRequest);
+ }
+ this.activeRequest = Roo.Ajax.request(o);
+ }else{
+ this.conn.request(o);
+ }
+ }else{
+ callback.call(scope||this, null, arg, false);
+ }
+ },
+
+ // private
+ loadResponse : function(o, success, response){
+ delete this.activeRequest;
+ if(!success){
+ this.fireEvent("loadexception", this, o, response);
+ o.request.callback.call(o.request.scope, null, o.request.arg, false);
+ return;
+ }
+ var result;
+ try {
+ result = o.reader.read(response);
+ }catch(e){
+ this.fireEvent("loadexception", this, o, response, e);
+ o.request.callback.call(o.request.scope, null, o.request.arg, false);
+ return;
+ }
+
+ this.fireEvent("load", this, o, o.request.arg);
+ o.request.callback.call(o.request.scope, result, o.request.arg, true);
+ },
+
+ // private
+ update : function(dataSet){
+
+ },
+
+ // private
+ updateResponse : function(dataSet){
+
+ }
+});
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