I'm confused by what you mean by that. Are you saying I need to somehow
rewrite the class of the FilterChain object passed to my filter?
To be clear, I'm trying to modify the response that comes back from the
service. I have a header that I may or may not need to set based on the
response code. I believe the service sets the response code?
On Thu, Mar 13, 2014 at 6:20 PM, Martin Gainty <mgai...@hotmail.com> wrote:
> you'll need to pass your modified response to service method of servlet
> which is *in* the filterChain
>
>
> ApplicationFilterChain::internalDoFilter(ServletRequest request,
> ServletResponse response)
> throws IOException, ServletException
>
> {
> ............
> servlet.service(request, response);
>
> ...........
>
> }
>
> Martin
>
>
>
>
>
>
> > Date: Thu, 13 Mar 2014 17:51:59 -0700
> > Subject: filter question
> > From: catph...@catphive.net
> > To: users@tomcat.apache.org
> >
> > I have a filter with doFilter method like this:
> >
> > public void doFilter(ServletRequest request,
> > ServletResponse response,
> > FilterChain chain)
> > throws IOException, ServletException {
> > HttpServletRequest req = (HttpServletRequest) request;
> > HttpServletResponse resp = (HttpServletResponse) response;
> >
> > resp.setHeader("Cache-Control",
> > "must-revalidate, max-age=0, post-check=0,
> > pre-check=0");
> >
> > chain.doFilter(request, response);
> > }
> >
> > This sets the header. However, if I set the header *after*
> chain.doFilter,
> > the header is not set. Why is this?
> >
> > public void doFilter(ServletRequest request,
> > ServletResponse response,
> > FilterChain chain)
> > throws IOException, ServletException {
> > HttpServletRequest req = (HttpServletRequest) request;
> > HttpServletResponse resp = (HttpServletResponse) response;
> >
> > chain.doFilter(request, response);
> >
> > resp.setHeader("Cache-Control",
> > "must-revalidate, max-age=0, post-check=0,
> > pre-check=0");
> > }
> >
> > Programmatically I can see the header is null.
> >
> > Has the content already been sent to the web browser after
> chain.doFilter?
> > If so, is there a way to delay sending data to the browser? I need to
> > inspect the status code in the response before setting my header (to
> > prevent 404's from being cached).
> >
> > Thanks,
> > Brendan Miller
>
>
