RESTFUL Datasource Issue

[asad_naeem]

Be sure your post includes:

1. the SmartGWT 2.1 and all supporting browser version(s) involved;
I have used the following code but I am getting the error image attached.
5.

package com.smartgwt.sample.showcase.client.webservice;  

import com.smartgwt.client.data.DataSource;  
import com.smartgwt.client.data.fields.DataSourceTextField;  
import com.smartgwt.client.data.fields.DataSourceLinkField;  
import com.smartgwt.client.widgets.Canvas;  
import com.smartgwt.client.widgets.grid.ListGrid;  
import com.smartgwt.sample.showcase.client.PanelFactory;  
import com.smartgwt.sample.showcase.client.ShowcasePanel;  

public class RssSample implements EntryPoint {  

    public void onModuleLoad() {  
        DataSource dataSource = new DataSource();  
        dataSource.setDataURL("http://rss.slashdot.org/Slashdot/slashdot");  
        dataSource.setRecordXPath("//default:item");  

        DataSourceTextField titleField = new DataSourceTextField("title", "Title");  
        DataSourceLinkField linkField = new DataSourceLinkField("link", "Link");  

        dataSource.setFields(titleField, linkField);  

        ListGrid grid = new ListGrid();  
        grid.setAutoFetchData(true);  
        grid.setHeight(200);  
        grid.setWidth100();  
        grid.setDataSource(dataSource);  

        grid.draw();  
    }  
}

How to avoid this error? Or is there any other way to do this???

[davidj6]

Message is pretty self-explanatory. Server-side proxy is another way around it. If you don't understand, google it.