Apache2 & vary header: Made IE not able to cache images on subdomain

Hal Burgiss hal at burgiss.net
Mon Apr 20 17:03:37 UTC 2009


On Sun, Apr 19, 2009 at 2:42 AM, howard chen <howachen at gmail.com> wrote:
> Hey,
>
> Can anyone can check for me if your apache2 on ubuntu 8.10 did sent
> out the "Vary=Host" header?
>
> If yes, this will lead to IE not able to cache the images if it is
> served from subdomain.
>
> Even thought I am using IE7, Firefox and Opear don't have this problem.
>
> If yes, then I would report a bug.
>
>
> p.s I have mod_deflate, mod_ssl, mod_php, mod_python, mod_expire.
> (which is quite common)

Mine sends:

    Vary: Accept-Encoding

which according to the Apache docs, is expected behavior.

-- 
Hal




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