A small sample program was written to test how the Java Authenticator behaves when no credentials are provided for a given type of authentication.  The Authenticator fails to behave as expected expected when a user does not have any credentials to provide for Integrated Winodws Authentication.  The Authenticator continues to get called until a max redirect exception is thrown.  The output of the sample program and code that produced it is below.  Note:  If the IP address doesn't work contact ###@###.### for current address.

Digest Authentication Test
>> Authenticator Called
java.io.IOException: Server returned HTTP response code: 401 for URL: http://129.148.174.126/DigestSecurity/cicerone/Cicerone.jnlp
Exception: Response code 401 Unauthorized

Basic Authentication Test
>> Authenticator Called
java.io.IOException: Server returned HTTP response code: 401 for URL: http://129.148.174.90/BasicSecurity/file1.txt
Exception: Response code 401 Access Denied

Integrated Windows Authentication Test
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
>> Authenticator Called
java.net.ProtocolException: Server redirected too many  times (20)
Exception: Response code 401 Unauthorized/*





 * Main.java
 *
 * Created on June 2, 2005, 4:02 PM
 *
 * To change this template, choose Tools | Options and locate the template under
 * the Source Creation and Management node. Right-click the template and choose
 * Open. You can then make changes to the template in the Source Editor.
 */

package httptest;

import java.io.*;
import java.util.*;
import java.net.*;

/**
 *
 * @author aw158418
 */
public class Main   {
    
    static HttpURLConnection conn = null;
    
    /** Creates a new instance of Main */
    public Main() {
    }
    
    static class MyAuthenticator extends Authenticator {
        static int i = 0;
        
        MyAuthenticator() {
            super();
        }
        
        public PasswordAuthentication getPasswordAuthentication() {
            System.out.println(">> Authenticator Called");
            String str = "";
            
            // Authenticator returning null as though user hit cancel
            return null;
        }
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Authenticator.setDefault( new MyAuthenticator() );
        URL link = null;
        try {
            link = new URL("http://129.148.174.126/DigestSecurity/cicerone/Cicerone.jnlp");
            openFileFromServer( link );
            
            link = new URL("http://129.148.174.90/BasicSecurity/file1.txt");
            openFileFromServer( link );
            
            link = new URL("http://129.148.174.126/KerberosSecurity/clockApplet/clock.html");
            openFileFromServer( link );
        } catch( Exception e ) {
            e.printStackTrace();
        }
    }
    
    private static void openFileFromServer( URL url ) {
        try {
            conn = (HttpURLConnection)url.openConnection();
            
            DataInputStream dis = new DataInputStream(conn.getInputStream());
            
            String inputLine;
            
            // Read Content
            while( (inputLine = dis.readLine()) != null ) {
                System.out.println(inputLine);
            }
            
            dis.close();
            
        } catch (MalformedURLException me) {
            System.out.println("MalformedURLException: " + me);
        } catch (IOException ioe) {
            try { 
            System.out.println( ioe.toString() );
            System.out.print("Exception: Response code " + conn.getResponseCode());
            System.out.println(" " + conn.getResponseMessage());
            } catch( Exception e ){
                e.printStackTrace();
            }
        }
    }
}