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Subject: Filter function is called three times
Date: Tue, 9 Oct 2007 13:46:42 +0200
Message-ID: <DA46793D4882CB48A95E5DAA60D399B8012CC951@MSXVS04.trivadis.com>
Thread-Topic: Filter function is called three times
Thread-Index: AcgKaJyi3bWcpT7BS4aH087LSdXrZg==
From: =?iso-8859-1?Q?Sven_K=E4gi?= <Sven.Kaegi@trivadis.com>
To: <modules-dev@httpd.apache.org>

Hi all,

I'm just trying to write my first Module (actually a filter) for Apache =
and
made an observation I can't explain.

I have now made an empty skeleton that has some dummy configuration and
a callback function for my filter that I registered as follows:

static void register_hooks(apr_pool_t *p)
{
  ap_register_input_filter(tvdldapfilter_name, insert_ldap_headers, =
NULL,
                           AP_FTYPE_CONTENT_SET);
}

The callback function itself has at the moment no functionality apart =
from
reading the dummy config and some logging.

I compiled the whole stuff, tested it with apache and it works fine. The =
only
thing is: according to my logs my filter is called three times (twice =
with
mode =3D=3D AP_MODE_READBYTES and once with some other mode). The test =
page I call
is a simple html-Page with no pictures or additional stuff. Actually =
it's a
copy from the "It-Works!"-page.

Finally my question: What could be the reason why my filter is called =
three
times instead of once and is there something I could do about that?

Thanks for any hint
Sven