From owner-freebsd-stable  Sat Jul 29 20:28:52 2000
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Date: Sat, 29 Jul 2000 20:28:41 -0700
From: Alfred Perlstein <bright@wintelcom.net>
To: Tony Finch <dot@dotat.at>
Cc: Paul Saab <paul@mu.org>, new-httpd@apache.org,
	freebsd-stable@FreeBSD.ORG, ym g <ymg@graffiti.net>
Subject: Re: Zen regarding accept filters
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* Tony Finch <dot@dotat.at> [000729 20:22] wrote:
> Paul Saab <paul@mu.org> wrote:
> >
> >This should also incorporate a check for __FreeBSD_version >= 410001.
> 
> I would have thought the check for the existence of SO_ACCEPTFILTER is
> sufficient.
> 
> >Also, the fact that it breaks HTTP/0.9 isn't really a big deal if you
> >are going to enable this feature.
> 
> Yes, but it does mean that it cannot be enabled by default (since
> Apache must be standards-compliant), which is a bit bogus. However you
> can use the "dataready" filter and get most of the benefit of the
> "httpready" filter without breaking HTTP/0.9. There are a few user
> agents that send request headers in more than one packet (e.g.
> Netscape when it's sending a POST) but it isn't very common.

It's been discussed before, the main culprits are sessions with
large sized cookies along with very large GET requests which can
force 4-6 context switches without the filters.

And there are reported sightings of browsers sending data one
character at a time. :(

-Alfred


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