Java tutorial
import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; 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("<HTML><BODY>"); out.println("<H1>This is a password protected resource</H1>"); out.println("<PRE>"); 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("</PRE>"); out.println("</BODY></HTML>"); } }