[exim-dev] [Bug 638] rfc2047 encoding doesn't work correctly

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Autor: Kjetil Torgrim Homme
Datum:  
To: exim-dev
Alte Treads: [exim-dev] [Bug 638] New: rfc2047 encoding doesn't work correctly
Betreff: [exim-dev] [Bug 638] rfc2047 encoding doesn't work correctly
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http://bugs.exim.org/show_bug.cgi?id=638

Kjetil Torgrim Homme <kjetilho@???> changed:

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--- Comment #2 from Kjetil Torgrim Homme <kjetilho@???> 2008-10-22 16:53:13 ---
To the original poster: use $rh_ instead, and add a condition to see if it's
needed.

condition = ${if !match {$h_Subject:} {\\[${tr{$local_part}{_}{-}}\\]}}
headers_remove = Subject
headers_add = Subject: [${tr{$local_part}{_}{-}}]\n $rh_Subject:

(untested)

Alternatively, you can check the $h_ value against [^ -~] and only apply
${rfc2047: if it matches -- then you know the result will be encoded words, and
a ${sg of SPACE into LF SPACE will do the right thing.

To Derrick: what is BR?

I stand by my comment in the referenced mail thread: the simplest way of fixing
this problem is to unfold header lines when $h_ is used. it will be very hard
(for exim.conf writers) to avoid adding extraneous whitespace otherwise.

I don't think the separator used in ${rfc2047: should change, since sites which
use a ${sg of SPACE into LF SPACE (as suggested above) will see their
configuration break (you get to LF in a row, ending the headers).

When it comes to decoding RFC 2047, *any* white space between two encoded words
shall be removed. it doesn't matter if it's just one SPACE, or LF TAB TAB LF
TAB. Of course, ${rfc2047d: does the right thing here. I haven't verified
that $h_ behaves the same way, but it would surprise me if it didn't.


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