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From Paul Querna <c...@force-elite.com>
Subject Re: [PATCH] mod_disk_cache: Handling of Varied Content
Date Mon, 13 Jun 2005 23:20:53 GMT
William A. Rowe, Jr. wrote:

>At 03:57 PM 6/12/2005, Paul Querna wrote:
>  
>
>>Justin Erenkrantz wrote:
>>
>>    
>>
>>>>ap_get_list_item() returns them lower-cased, avoiding this whole issue.
>>>>        
>>>>
>>>Relying on lowercased header names is not enough.  In certain cases, the
>>>header *values* are supposed to be rendered case-insensitively as well
>>>(Accept-Encoding, etc.).  Yet, in other cases, the header values are supposed
to be case-sensitive.  =)
>>>      
>>>
>>Ick.  Do you know of a magical list of which ones are case insensitive? (I mean, besides
reading the RFC for every header..)
>>    
>>
>
>The majority are case insenstive if they are values (encoding etc).
>Most of rfc2616 is case insensitive on header contents.
>
>So the better solution may be to identify headers which should be
>treated case-sensitive?
>HTTP URI's (3.2.3) [host and scheme are insensitive]
>HTTP method (5.1.1)
>
>HTTP-date values (3.3.1)
>
>
>Here's are some fun ones :)
>
>3.7 Media Types [exerpt]
>
>
>   The type, subtype, and parameter attribute names are case-
>   insensitive. Parameter values might or might not be case-sensitive,
>   depending on the semantics of the parameter name.
>
>
>4.20 Except [exerpt]
>
>
>   Comparison of expectation values is case-insensitive for unquoted
>   tokens (including the 100-continue token), and is case-sensitive for
>   quoted-string expectation-extensions.
>
>
>Is your head spinning yet?
>  
>
Yes, my head is spinning .

I committed a revised version of the original patch today in revision 
190530.  It is based on the feedback from justin on re-using the 
.headers file.

I included your comments about case-sensitivity in mod_disk_cache under 
a TODO.

-Paul

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