I already found the problem. It is about how a request
shall be written in a JSP file: using <c:url
value="myRequest.html">.
Thanks
--- Vernon <[EMAIL PROTECTED]> wrote:
> Hi, all,
>
> In my application, a session attribute is needed to
> let the application function properly. So, I have a
> filter to verify whether this attribute is set or
> not
> in the session.
>
> The doFilter method of the filter is something like
> the following:
>
> public void doFilter(ServletRequest request,
> ServletResponse response,
> FilterChain chain) throws IOException,
> ServletException {
>
> HttpServletRequest hreq = (HttpServletRequest)
> request;
> logger.debug("Enter: " + hreq.getRequestURL());
> if (request instanceof HttpServletRequest) {
> logger.debug("instanceof");
> HttpSession session = hreq.getSession(false);
> // Check the session setting
> if (session != null) {
> logger.debug("session");
> if (session.getAttribute("myAttr") != null) {
> logger.debug("Attr set");
> // jump to the resource if it is set
> chain.doFilter(request, response);
> return;
> }
> }
> }
>
> // ....
>
>
filterConfig.getServletContext().getRequestDispatcher(
> "/" +
> the_page).forward(request, response);
> return;
>
> }
> }
>
> After having an additonal segment of the application
> up, I find the the getSession(false) returns null
> for
> the requests of the first segment of application.
> When
> I click the first segment of the application, I am
> forwarded to the "the_page", while I reach the right
> page on the second segment. There is not any
> architecture difference between these two segments.
>
> I use the Spring framework by the way. I don't think
> the framework has anything to do with the session
> management.
>
> What is the cause?
>
> Thanks very much for all your inputs in advance.
>
> Vernon
>
>
>
>
>
> __________________________________
> Yahoo! Mail - PC Magazine Editors' Choice 2005
> http://mail.yahoo.com
>
>
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