Justin Wyllie wrote:
Hi
I am trying to use:
$headers = $r->headers_out;
$r->no_cache(1);
$headers->set( Location => url );
return REDIRECT.
The first problem is this does not set the Cache-Control header.
If instead of the redirect I output some content (200 ) then it does,
correctly.
Is there some reason why this may be? I couldn't see anything in our
Apache configuration files where this is set up.
No idea. Does it set the Pragma header, but not the Cache-Control one?
Second question:
Does it make sense to try to set Cache-Control with a redirect anyway?
To my mind, no. There's no content to cache, and normally (IIRC) if a
browser is sent a 302, it'll request it again if you request it again.
With a 301, some browsers will cache the fact that that URL 301'd
before, and just take you right to the page you 301'd to.
If url1 is requested and the redirect is to url2. What is the
browser/proxy being told not to cache - url1 or url2? Since it is url2
in the response headers surely url2?
I have no idea what the spec would be, but if you 302 with a
Cache-Control header to a page that doesn't have a Cache-Control header,
I would not expect (or want) the header from the 302 to apply to the
other page.
Adam
