Giving multiple URL patterns to Servlet Filter

Question

I am using a Servlet Filter in my JSF application   I have three groups of Web pages in my application  and I want to check Authentication for these pages in my Servlet Filter   my Folders   Admin    xhtml   Supervisor   xhtml  Employee   xhtml   and I am writing web xml like   lt filter gt       lt filter-name gt LoginFilter lt  filter-name gt       lt filter-class gt com ems admin servlet LoginFilter lt  filter-class gt   lt  filter gt    lt filter-mapping gt       lt filter-name gt LoginFilter lt  filter-name gt       lt url-pattern gt  Employee   lt  url-pattern gt   lt  filter-mapping gt   lt filter-mapping gt       lt filter-name gt LoginFilter lt  filter-name gt       lt url-pattern gt  Admin   lt  url-pattern gt   lt  filter-mapping gt   lt filter-mapping gt       lt filter-name gt LoginFilter lt  filter-name gt       lt url-pattern gt  Supervisor   lt  url-pattern gt   lt  filter-mapping gt    but requests like  http   localhost 8080 EMS2 faces Html Admin Upload xhtml   are not entering into Filter   I have to provide security to these 3 folders   How to solve this problem

User · Answer

In case you are using the annotation method for filter definition (as opposed to defining them in the web.xml), you can do so by just putting an array of mappings in the @WebFilter annotation:

/**
 * Filter implementation class LoginFilter
 */
@WebFilter(urlPatterns = { "/faces/Html/Employee","/faces/Html/Admin", "/faces/Html/Supervisor"})
public class LoginFilter implements Filter {
    ...

And just as an FYI, this same thing works for servlets using the servlet annotation too:

/**
 * Servlet implementation class LoginServlet
 */
@WebServlet({"/faces/Html/Employee", "/faces/Html/Admin", "/faces/Html/Supervisor"})
public class LoginServlet extends HttpServlet {
    ...

User · Answer

If an URL pattern starts with    then it s relative to the context root  The  Admin   URL pattern would only match pages on http   localhost 8080 EMS2 Admin    assuming that  EMS2 is the context path   but you have them actually on http   localhost 8080 EMS2 faces Html Admin    so your URL pattern never matches   You need to prefix your URL patterns with  faces Html as well like so    lt url-pattern gt  faces Html Admin   lt  url-pattern gt    You can alternatively also just reconfigure your web project structure configuration so that you can get rid of the  faces Html path in the URLs so that you can just open the page by for example http   localhost 8080 EMS2 Admin Upload xhtml   Your filter mapping syntax is all fine  However  a simpler way to specify multiple URL patterns is to just use only one  lt filter-mapping gt  with multiple  lt url-pattern gt  entries    lt filter-mapping gt       lt filter-name gt LoginFilter lt  filter-name gt       lt url-pattern gt  faces Html Employee   lt  url-pattern gt       lt url-pattern gt  faces Html Admin   lt  url-pattern gt       lt url-pattern gt  faces Html Supervisor   lt  url-pattern gt   lt  filter-mapping gt

[servlets] Giving multiple URL patterns to Servlet Filter

Examples related to servlets

Examples related to servlet-filters

Examples related to url-pattern