Re: mime_header_checks physical lines vs logical headers

[Vincent Lefevre]

On 2012-10-09 09:47:08 -0400, Wietse Venema wrote:
> Vincent Lefevre:
> > Hi,
> > 
> > With postfix 2.9.3-2~12.04.3 under Ubuntu:
> > 
> > The header_checks(5) man page says:
> > 
> >    Note: message headers are examined one logical header at a time,
> >    even when a message header spans multiple lines. Body lines  are
> >    always examined one line at a time.
> > 
> > But after doing various tests on mime_header_checks, it appears
> > that headers are examined one physical line at a time (instead
> > of logical headers).
> 
> If you think there is a bug, then you are supposed to provide the
> evidence, instead of planting false rumors and spreading FUD.

Here's an example:

The message "msg":

------------------------------------------------------------
>From a@b.c Tue Oct  9 16:16:44 2012
Date: Tue, 9 Oct 2012 16:16:40 +0200
From: a@b.c
To: a@b.c
Subject: test
Message-ID: <20121009141640.gv4...@xvii.vinc17.org>
MIME-Version: 1.0
Content-Type: multipart/mixed; boundary="J5MfuwkIyy7RmF4Q"
Content-Disposition: inline
Content-Transfer-Encoding: 8bit


--J5MfuwkIyy7RmF4Q
Content-Type: text/plain; charset=iso-8859-1
Content-Disposition: inline
Content-Transfer-Encoding: 8bit

test

--J5MfuwkIyy7RmF4Q
Content-Type: text/plain; charset=us-ascii
Content-Disposition: attachment;
 filename=foo


--J5MfuwkIyy7RmF4Q--


------------------------------------------------------------

A mime_header_checks.pcre file:

------------------------------------------------------------
/^Content-Disposition:.*filename/
  REJECT logical header

/^\s*filename/
  REJECT physical line
------------------------------------------------------------

Now, when I try with postmap:

$ postmap -m -q - pcre:mime_header_checks.pcre < msg
 filename=foo   REJECT physical line

Note that if I add the -h option, I get nothing:

$ postmap -m -h -q - pcre:mime_header_checks.pcre < msg

-- 
Vincent Lefèvre <vinc...@vinc17.net> - Web: <http://www.vinc17.net/>
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Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)