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From Sylvain Wallez <sylv...@apache.org>
Subject Re: "Vary: Host" in ResourceReader breaks IE
Date Tue, 13 Sep 2005 09:19:29 GMT
Ralph Goers wrote:

> Did you see 
> http://lists.over.net/pipermail/mod_gzip/2002-December/006826.html?


I'm a bit lost in these gory descriptions of IE bugs. So what is the 
right header to put to fix this cache issue, knowing that "Vary: Host" 
breaks downloads?

>> Hi all,
>>
>> I found an annoying thing today. The following straightforward 
>> sitemap statement, which is intended to download a zip file, leads IE 
>> to display an error message when the users tries to open Winzip from 
>> IE (saving the file on disk is ok):
>>    <map:read src="foo.zip" mime-type="application/x-zip-compressed"/>
>>
>> After some protocol-level debugging, it appears to be caused by the 
>> "Vary: Host" header that is added by the ResourceReader, which leads 
>> to an error message in IE. This bug has been identified in 1999 [1]!!!
>>
>> Now it seems that this header was added to work around an IE cache 
>> bug [2] about which no details are given.
>>
>> So the fix to the unknown cache problem leads to falling into another 
>> IE bug. Can someone explain the reason for the Vary header? If not, 
>> I'd like to remove it so that downloads work again...
>>
>> Sylvain
>>
>> [1] http://archive.apache.org/gnats/4118
>> [2] http://issues.apache.org/bugzilla/show_bug.cgi?id=14048
>>
-- 
Sylvain Wallez                        Anyware Technologies
http://people.apache.org/~sylvain     http://www.anyware-tech.com
Apache Software Foundation Member     Research & Technology Director


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