[rome-fetcher]how to get rss data from the basic authenticated web site

Steps to get rss data from the basic authenticated web site like the twitter.

1. Create a new class implemented the CredentialSupplier interface. this class stores the username and password for the basic authentication and returns the Credentials object of the apache http client. following code is a sample class implemented the CredentialSupplier interface
   

   import com.sun.syndication.fetcher.impl.HttpClientFeedFetcher.CredentialSupplier;
   import org.apache.commons.httpclient.UsernamePasswordCredentials;
   import org.apache.commons.httpclient.Credentials;
   public class AuthCredentialSupplier implements CredentialSupplier{
    private String username=null;
    public void setUsername(String username){
     this.username=username;
    }
    public String getUsername(){
     return this.username;
    }
   
    private String password=null;
    public void setPassword(String password){
     this.password=password;
    }
    public String getPassword(){
     return this.password;
    }
   
    public AuthCredentialSupplier(){
    }
    public AuthCredentialSupplier(String username,String password){
     setUsername(username);
     setPassword(password);
    }
    public Credentials getCredentials(String realm, String host){
     String username=getUsername();
     String password=getPassword();
     return new UsernamePasswordCredentials(username,password);
    }
   }
   

2. Access to the rss url and get rss data from the basic authenticated web site. When accessing to the rss url, we need to use the HttpClientFeedFetcher instead of HttpURLFeedFetcher.
   

    //sample program
    //rss url
    String url="http://twitter.com/statuses/friends_timeline.atom";
   
    //username and password
    String username="username";
    String password="password";
     
    try{
     //create and initialize CredentialSupplier Object
     AuthCredentialSupplier authCredentials=new AuthCredentialSupplier(username,password);
     //create HttpClientFeedFetcher object
     //(we can not use HttpURLFeedFetcher with basic authentication)
     FeedFetcher feedFetcher=new HttpClientFeedFetcher(null,authCredentials);
     List result=(feedFetcher).retrieveFeed(new URL(url)).getEntries();
     //get response.
     if(result!=null){
      .....
     }
     else{
      System.out.println("ERROR")
     }
    }catch(FetcherException e){
     int responseCode=e.getResponseCode();
     System.out.println("ERROR, response code="+responseCode+", error="+e);
    }catch(Exception e){
     System.out.println("Unexpected Exception, e="+e)
    }