import java.io.*; import java.security.*; import javax.servlet.*; import javax.servlet.http.*; public class AuthenticationSnoop extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { res.setContentType("text/html"); PrintWriter out = res.getWriter(); out.println("
"); out.println("User Name: " + req.getRemoteUser()); String name = (req.getUserPrincipal() == null) ? null : req.getUserPrincipal().getName(); out.println("Principal Name: " + name); out.println("Authentication Type: " + req.getAuthType()); out.println("Is a Manager: " + req.isUserInRole("manager")); out.println(""); out.println(""); } }