101 lines
No EOL
3.6 KiB
JavaScript
101 lines
No EOL
3.6 KiB
JavaScript
/*
|
|
* Ext JS Library 1.0.1
|
|
* Copyright(c) 2006-2007, Ext JS, LLC.
|
|
* licensing@extjs.com
|
|
*
|
|
* http://www.extjs.com/license
|
|
*/
|
|
|
|
/**
|
|
* @class Ext.data.HttpProxy
|
|
* An implementation of Ext.data.DataProxy that reads a data object from an Ext.data.Connection object
|
|
* configured to reference a certain URL.
|
|
* <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.
|
|
* <p>
|
|
* For cross-domain access to remote data, use an Ext.data.ScriptTagProxy.
|
|
* </em>
|
|
* <p>
|
|
* Be aware that to enable the browser to parse an XML document, the server <strong>must</strong> set
|
|
* the Content-Type header to "text/xml".
|
|
* @constructor
|
|
* @param {Object} conn An Ext.data.Connection object referencing the URL from which the data object
|
|
* is to be read, or a configuration object for an Ext.data.Connection.
|
|
*/
|
|
Ext.data.HttpProxy = function(conn){
|
|
Ext.data.HttpProxy.superclass.constructor.call(this);
|
|
// is conn a conn config or a real conn?
|
|
this.conn = conn.events ? conn : new Ext.data.Connection(conn);
|
|
};
|
|
|
|
Ext.extend(Ext.data.HttpProxy, Ext.data.DataProxy, {
|
|
// private
|
|
getConnection : function(){
|
|
return this.conn;
|
|
},
|
|
|
|
/**
|
|
* Load data from the configured Ext.data.Connection, read the data object into
|
|
* a block of Ext.data.Records using the passed Ext.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 {Ext.data.DataReader) reader The Reader object which converts the data
|
|
* object into a block of Ext.data.Records.
|
|
* @param {Function} callback The function into which to pass the block of Ext.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){
|
|
this.conn.request({
|
|
params : params || {},
|
|
request: {
|
|
callback : callback,
|
|
scope : scope,
|
|
arg : arg
|
|
},
|
|
reader: reader,
|
|
callback : this.loadResponse,
|
|
scope: this
|
|
});
|
|
}else{
|
|
callback.call(scope||this, null, arg, false);
|
|
}
|
|
},
|
|
|
|
// private
|
|
loadResponse : function(o, success, response){
|
|
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){
|
|
|
|
}
|
|
}); |