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From Nick Kew <>
Subject Re: mod_filter and adding to the Vary header in 2.2.x
Date Wed, 01 Jun 2011 01:07:24 GMT

On 31 May 2011, at 22:19, Stefan Fritsch wrote:

> But there isn't any code in mod_filter to add Vary headers.

The protocol stuff in mod_filter is somewhat half-baked.
Basically, so long as filters can get configured without reference
to mod_filter, they need to deal with protocol concerns themselves.
To change that would call for more significant surgery to the
filter framework.

If you want to tackle it, it would be a Good Idea to think through how
it interacts with a wide selection of real-life filters.  It looks unduly
complex to derive from FilterProvider rules + filter properties, so I
wonder if the least-bad solution would be yet another config option?

Nick Kew

Available for work, contract or permanent

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