hello.
in a filter, is it possible to cast the ServletRequest to a
HttpServletRequest and retrieve the HttpSession object, *if* the session
has never been created before?
i tried the following:
1 public void doFilter(ServletRequest req, ServletResponse res,
FilterChain chain) throws IOException, ServletException {
2
3 HttpServletRequest hreq = (HttpServletRequest)req;
4 chain.doFilter(hreq,res);
5
6 // if it's the client's first access, the below returns false
7 if( hreq.isRequestedSessionIdValid() ) {
8 // ...not processed; go to else clause below...
9 } else {
10 String sid = hreq.getSession().getId();
11 }
12 }
the request hangs on line 10 (which is when a client is accessing for the
*first time*).
however, if the servlet (that receives the request in "doFilter()") calls
request.getSession(), then the above filter is able to retrieve the
HttpSession without a problem.
is a filter prevented from creating a *new* HttpSession object?
most likely, i'll be calling the request.getSession() in my servlet, so it
shouldn't be a problem, but i discovered this before placing the
request.getSession() code in my servlet.
thank you.
tomcat: 4.0.4
os: windows2000
jdk: 1.3.1_04
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