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Re: NEW ISSUE: Methods and Caching

From: Julian Reschke <julian.reschke@gmx.de>
Date: Tue, 18 Nov 2008 18:41:37 +0100
Message-ID: <4922FE51.4040803@gmx.de>
To: Werner Baumann <werner.baumann@onlinehome.de>
CC: ietf-http-wg@w3.org

Werner Baumann wrote:
> Julian Reschke wrote:
>> Werner Baumann wrote:
>>> ...
>>> Apart from the method the intermediary cache would have to include 
>>> the DEPTH header and a list of requested properties into the key. And 
>>> what would be the cache hit rate?
>>> ...
>> It could be quite good, depending on what clients do; such as 
>> refreshing a collection view over and over again (think explorer-like 
>> clients).
> Conditional PROPFIND would be very useful for user agents (i.e. WebDAV 
> clients). But the problem is RFC 4918, which does not define anything 
> like a cache validation mechanism for properties (and not for 
> collections). I don't think this missing functionality can be added by 
> some extension, but it would require a revision of RFC 4918.
> I doubt that it would be very useful for intermediaries. WebDAV access 
> is usually restricted to a comparably small set of users.

I also believe that it would be both tricky and a lot of work to add all 
the additional infrastructure for validators.

-- which essentially makes PROPFIND results GETtable.

BR, Julian
Received on Tuesday, 18 November 2008 17:42:24 UTC

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