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Re: New mail-related routines

From: Reiner Steib
Subject: Re: New mail-related routines
Date: Tue, 19 Oct 2004 22:02:17 +0200
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/21.3.50 (gnu/linux)

On Tue, Oct 19 2004, Alexander Pohoyda wrote:

> Reiner Steib <address@hidden> writes:
>> > +(defun mail-unfold-region (from to)
>> > +  "Unfold header fields in the region between FROM and TO, 
>> > +as defined by RFC 2822."
>> I didn't look at the other functions, but this one is incorrect,
> Yes, you're right, the function does not conform strictly.  

Well, the doc string says "as defined by RFC 2822".

> However, many MUAs insert either TAB

IIRC, using "\n\t" is correct.  (Disclaimer: I'm not an expert on

> or few SPACE characters during header field folding, so this kind of
> "loose" unfolding is also desired, I think.

I'd call it "broken".  Some programs also convert "foo bar" to
"foobar" because of incorrect unfolding.

> I'll add an optional argument to control this behaviour.

Please make the _strict_ behavior the default.

>> The result with `rfc2047-unfold-region' is correct:
> Funny that the RFC 2047 itself does not define header field
> folding/unfolding, 

Section 8 of RFC 2047 contains examples for unfolding.

> so rfc2047-unfold-region is rather confusing name for this function.

As soon as the MUA or news client claims to support MIME, it has to
unfold headers according to the MIME rules.

> However, let's talk about RFC 2047 functions later :-)

Bye, Reiner.
      (o o)
---ooO-(_)-Ooo---  |  PGP key available  |  http://rsteib.home.pages.de/

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