res.setContentType("text/html");
PrintWriter out = res.getWriter();
out.println("<HTML><HEAD><TITLE>AuthenticationSnoop</TITLE></HEAD><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>");
