Authorization filter,2 questions...

"gbattine" <>
16 Oct 2006 04:15:45 -0700
Hi guys,
i need your help to solve my question..
i'm developing a jsf application and i've created an authorization
My filter must checking for each page access if a registered user is
stored in the session,if not redirect to login page. I've a bit
experience on servlet and filter and i've solved this question with
this filter.

import javax.servlet.*;
import javax.servlet.http.*;

public class AuthorizationFilter implements Filter {
     * name="config"
     * @uml.associationEnd
    FilterConfig config = null;

     * name="servletContext"
     * @uml.associationEnd
    ServletContext servletContext = null;

    public AuthorizationFilter() {

    public void init(FilterConfig filterConfig) throws ServletException {
        config = filterConfig;
        servletContext = config.getServletContext();

    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {
        Utils.log(servletContext, "Inside the filter");

        HttpServletRequest httpRequest = (HttpServletRequest) request;
        HttpServletResponse httpResponse = (HttpServletResponse) response;
        HttpSession session = httpRequest.getSession();

        String requestPath = httpRequest.getPathInfo();
        Visit visit = (Visit) session.getAttribute("visit");

        if (visit == null) {
            System.out.println("Visit Nullo");
            session.setAttribute("originalTreeId", httpRequest
            Utils.log(servletContext, "redirecting to "
                    + httpRequest.getContextPath() + "/faces/Login.jsp");
                    + "/index.jsp");

        else {

            chain.doFilter(request, response);

        Utils.log(servletContext, "Exiting the filter");

    public void destroy() {

in my authentication bean,after user has logged in i've


User newUser = new User(loginName, password,teamName, role);
Visit visit = new Visit();

to store values into visit object.

and this is my logout function

FacesContext facesContext = getFacesContext();
        Utils.log(facesContext, "Executing AuthenticationBean.logout()");

        HttpSession session = (HttpSession) facesContext.getExternalContext()

        if (session != null) {

My 2 questions are:

1) how can i redirect to login page a user that tries to log in with
the same data of a user stored in the session?
2) how can i handling browser closing?I need a listener?
Please help me,i'm trying to learn about it and i need your help.

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