[Mod_gzip] "mod_gzip_send_vary=Yes" disables caching on IE? (1.3.26.1a)

[Slava Bizyayev]

OK, it's interesting...
Let's try one more thing:

header("Sun, 08 Dec 2002 05:28:43 GMT");
header("Vary: *");
header("Expires: Tuesday, 10-December-2002 10:00:00 GMT");
echo "Hi";

Thanks,
Slava

----- Original Message -----
From: "Jordan Russell" <jr-list-mod_gzip@quo.to>
To: <mod_gzip@lists.over.net>
Sent: Saturday, December 07, 2002 9:06 PM
Subject: Re: [Mod_gzip] "mod_gzip_send_vary=Yes" disables caching on IE?
(1.3.26.1a)


> "Slava Bizyayev" wrote:
> > When you wish to control the client side cache you would consider to
> provide
> > the appropriate Expires header first. You can set the lifetime of your
> > response in client's cache up to 1 year. This client will never bother
you
> > again until the expiration date (unless the user hits the Refresh button
> > earlier).
>
> ...except in the case where there's a Vary header but no
"Content-Encoding:
> gzip" header, it seems.
>
> In my tests, IE 6 will cache this OK:
>
> header("Expires: Mon, 08 Dec 2003 00:00:00 GMT");
> echo "Hi";
>
> IE won't cache the following, though -- it acts as if the Expires header
> isn't there. (Note: I cleared my browser cache before doing this test.)
>
> header("Vary: Content-Encoding");
> header("Expires: Mon, 08 Dec 2003 00:00:00 GMT");
> echo "Hi";
>
> (Again, by "won't cache" I mean the page gets reloaded on every visit,
even
> when you pass by it using the Back/Forward buttons in the browser.)
>
> But then, as usual, if I add in gzip encoding, IE caches the page just
fine:
>
> header("Content-Encoding: gzip");
> header("Vary: Content-Encoding");
> header("Expires: Mon, 08 Dec 2003 00:00:00 GMT");
> echo gzencode("Hi");
>
> Jordan Russell
>
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