Servlet Filter issue

Question

Hi,
In my project we have written custom filter which will intercept each request and check whether session is active or not. If not then redirect it to login page else user can do normal operation.
but the problem is, whenever i make a request, CustomFilter.doFilter() method is getting called 7-8 times. Ideally it should be called once, can anybody tell me what would be the root cause?
following are the configuration made for customfilter in web.xml
<filter>
<filter-name>customfilter</filter-name>
<filter-class>com.foo.CustomFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>customfilter</filter-name>
<url-pattern>*.jfsf</url-pattern>
</filter-mapping>
Apart from this, i do have faces-servlets default filter in web.xml
Am I am missing something in the filter configuration?>
Please advice.
Thanks
chintan

Answer 1

I have the same problem, but in my case its looping inside the doFilter and never terminationg from it, and becz of that I dont see the 1st page(Login page ) what could be the problem,
here is my web.xml..
     <filter>
          <filter-name>LoginFilter</filter-name>
          <filter-class>
               com.indemand.indab.architecture.LoginFilter
          </filter-class>
          <init-param>
               <param-name>error_page</param-name>
               <param-value>login.jsp</param-value>
          </init-param>
          <init-param>
               <param-name>login_page</param-name>
               <param-value>login.jsp</param-value>
          </init-param>
     </filter>
     <filter-mapping>
          <filter-name>LoginFilter</filter-name>
          <url-pattern>/*</url-pattern>
     </filter-mapping>
and here is filter class----
public void doFilter(ServletRequest request, ServletResponse response,
               FilterChain chain) throws IOException, ServletException {
          HttpSession session = ((HttpServletRequest) request).getSession(true);
          User currentUser = (User) session.getAttribute("user");
          String URI = ((HttpServletRequest) request).getRequestURI();
          System.out.println("Filter doFilter ......");
          if (filterConfig == null) {
               System.out.println("filterConfig null.");
               return;
          if (filterConfig.getInitParameter("error_page") != null) {
               errorPage = filterConfig.getInitParameter("error_page");
          } else {
               errorPage = "/indabch/login.jsp";
          if (filterConfig.getInitParameter("login_page") != null) {
               loginPage = filterConfig.getInitParameter("login_page");
          } else {
               loginPage = "/indabch/login.jsp";
          if (currentUser == null) {
               ((HttpServletResponse) response).sendRedirect(loginPage);
          } else {
               AuthorizationManager loginMan = new LoginManager();
               boolean authorized = loginMan.isUserAuthorized(currentUser
                         .getLoginName(), currentUser.getPassword());
               if (authorized) {
                    chain.doFilter(request, response);
               } else {
                    ((HttpServletResponse) response).sendRedirect(errorPage);
     }