package com.roshka.proyectofinal; import java.io.*; import java.util.*; import jakarta.servlet.*; import jakarta.servlet.http.*; public class ProtectedResource extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException { res.setContentType("text/plain"); PrintWriter out = res.getWriter(); // Get the session HttpSession session = req.getSession(true); // Does the session indicate this user already logged in? Object done = session.getValue("logon.isDone"); // marker object if (done == null) { // No logon.isDone means he hasn't logged in. // Save the request URL as the true target and redirect to the login page session.putValue("login.target", HttpUtils.getRequestURL(req).toString()); res.sendRedirect(req.getScheme() + "://" + req.getServerName() + ":" + req.getServerPort() + "/login.html"); return; } // If we get here, the user has logged in and can see the goods out.println("Unpublished O'Reilly book manuscripts await you!"); } }