On Thu, 2014-03-13 at 21:20 -0400, Martin Gainty wrote:
> you'll need to pass your modified response to service method of
> servlet which is *in* the filterChain
Utter nonsense.
> 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
>
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