public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException (session != null && session.getAttribute("user") != null)) chain.doFilter(req, res); else response.sendRedirect("login.html");
// 4. REST API using Jersey @Path("/api/users") public class UserResource java server programming black book pdf
private boolean authenticate(String user, String pass) // Implement actual authentication logic return "admin".equals(user) && "secret".equals(pass); public void doFilter(ServletRequest req
// 5. Filter for Authentication @WebFilter("/*") public class AuthFilter implements Filter FilterChain chain) throws IOException
@POST @Consumes(MediaType.APPLICATION_JSON) @Produces(MediaType.APPLICATION_JSON) public Response createUser(User user) userService.save(user); return Response.status(Response.Status.CREATED).entity(user).build();