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Subject: Re: Adding headers to 304 Responses
From: James Peach <jpeach@apache.org>
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Date: Fri, 22 Nov 2013 18:14:23 -0800
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To: users@trafficserver.apache.org

On Nov 22, 2013, at 4:59 PM, Mark Moseley <moseleymark@gmail.com> wrote:

> On Fri, Nov 22, 2013 at 4:46 PM, Shu Kit Chan <chanshukit@gmail.com> =
wrote:
> =46rom the header_rewrite plugin perspective,=20
> the 304 is coming straight out of ATS and not from origin server. =
That's fine.
> So all the plugin does is to look up "X-From-Apache" from this =
particular HTTP response between ATS and the client. It can't find it. =
So it cancelled the add-header operation for "X-ATS-1".
> But the add-header operation for "X-ATS-2" is still getting done =
without problem.
>=20
>=20
>=20
> However the header that's not seen by the headers_rewrite module is =
stored in the cached response. If I do a non-conditional, non-"Pragma: =
no-cache" request, there's likewise no request to the origin server but =
the header gets seen by the headers_module.
>=20
> So I'm trying to figure out how to amend the list of headers ATS =
should send back, in the event of a cache-fulfilled 304 request.

It might help to trace the "header_rewrite" diagnostic tag with =
proxy.config.diags.debug.tags. Can you also post your header_rewrite =
config file ... I've found that the syntax can be unintuitive ...

J=