I wasn't aware of the <init-param> solution -- is that new with Struts
1.1?
Regardless, we solve this problem by overriding the process method of
the ActionServlet and setting some headers prior to calling super.
Something like this:
protected void process(HttpServletRequest request,
HttpServletResponse response)
throws java.io.IOException, ServletException
{
// We're dynamic, so caching is disabled
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Pragma", "no-cache");
response.setHeader("Expires", "-1");
super.process(request, response);
}
That works for all the popular browsers. I think it's only the
"Expires" that actually works, though. The others are there due to
programmer superstition... :-)
-- Jim
Antony Stace <[EMAIL PROTECTED]> writes:
> Hi Folks
>
> I want to prevent caching of all pages in my webapp. What is the easiest way for me
>to append a dummy variable onto
> all the addresses which appear in the users browsers address bar, ie
>
> http://localhost/testWebApp?rand=7A98SDF7ASD9YFBA9D8S7FBASDBFASBFASDFSADFASD
>
> I don't want to rely on setting
>
> <init-param>
> <param-name>nocache</no-param>
> <param-value>true</no-param>
> </init-param>
>
> in my web.xml file since I have read in quite a few places that some browsers do not
>respect the
>
> <meta HTTP-EQUIV="Pragma" CONTENT="no-cache">
>
> directive which is sent in a http message from a server to browser.
>
>
>
> Cheers
>
> Tony
>
>
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Jim Crossley
http://www.lads.com/~jim
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