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From Joshua Marantz <>
Subject Re: output filter ordering question: mod_deflate vs mod_headers vs mod_pagespeed
Date Thu, 17 May 2012 13:27:10 GMT
Thanks for the quick reply, Nick.  I played around with this idea but
couldn't get it to work. My filter now runs at
AP_FTYPE_CONTENT_SET + 1, to make sure it runs after mod_headers.  I don't
know how to try to coax mod_deflate to run after me.  I can prevent it from
running before me by removing it from the filter-chain in before my main
filter-function runs, but when I try to then put it back in the filter
chain after my main filter function, it doesn't appear to work.  But you
are right; this is a hack on a hack and perhaps not worth pursuing further.

Is mod_filter a mechanism I could use in Apache 2.2 to accomplish what I
need?  I found and it
looks promising.  I'll give it a try.

The tone of your email made it sound like mod_filter is not quite ready,
but it's there in my distribution.  Can you elaborate on the state of


On Thu, May 17, 2012 at 2:30 AM, Nick Kew <> wrote:

> On 17 May 2012, at 04:24, Joshua Marantz wrote:
> > Or is that insane &/or dangerous?
> AP_FTYPE_ values are something of a blunt instrument, not ideal
> for cases where you care about ordering.  Running mod_headers
> as a filter is a bit of a hack.  What you're proposing is kind-of building
> a hack onto a hack.  I'm sure you can make it work (at least in
> controlled circumstances where you're not competing against
> other similar fudges) but IMHO you're right to be worried.
> Having once upon a time written mod_filter to deal with more
> complex configuration than the original design envisaged,
> I wonder if your issue might be a hint that we should
> revisit the API for programmatic configuration, and make
> your proposal less hackish?
> --
> Nick Kew

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