IE Fails to Cache when using HTTP VARY header

[charlesdesaintaignan]

Hi,

I've got a site where I want to do as much browser caching as possible
by setting the appropriate headers in the HTTP response. However, I
need to cache to be per-language. Namely, if you change your language
setting in the browser, the server is hit again to get the response for
that language.

I have this working in Firefox with the following response:

HTTP/1.x 200 OK
Server: Apache-Coyote/1.1
Cache-Control: max-age=86400, public, must-revalidate
Vary: Accept-Language
Last-Modified: Mon, 12 Jun 2006 19:52:32 GMT
Date: Mon, 12 Jun 2006 19:56:36 GMT

The "Vary" header is the one that tells the browser cache that this
response varys depending on the Accept-Language request header. Like I
said, this work in Firefox - however, nothing gets cached in IE. If I
remove the "vary" header, then IE caches properly. Does anyone know
about an IE bug around the "vary" header, or a way around this?

Thanks.

 

[Robert Aldwinckle]

....

Does anyone know about an IE bug around the "vary" header

....

Somewhere I have read a footnote that IE6 really only accepts
vary: User-Agent Otherwise all other uses of it could be treated as
vary: * (i.e. treat as nocache)

But this is the only page that a web search brings up with:

("vary: User-Agent" site:microsoft.com)

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnwebgen/html/ie_introfiddler2.asp


FYI

Robert Aldwinckle
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