Re: Unicode escape sequence | Re: draft-ietf-httpbis-header-structure-00, unicode range

"Poul-Henning Kamp" <phk@phk.freebsd.dk> Sat, 24 December 2016 09:08 UTC

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To: Julian Reschke <julian.reschke@gmx.de>
cc: Mark Nottingham <mnot@mnot.net>, Martin Thomson <martin.thomson@gmail.com>, Alexey Melnikov <alexey.melnikov@isode.com>, Matthew Kerwin <matthew@kerwin.net.au>, Kari Hurtta <hurtta-ietf@elmme-mailer.org>, Ilari Liusvaara <ilariliusvaara@welho.com>, HTTP working group mailing list <ietf-http-wg@w3.org>, Poul-Henning Kamp <phk@varnish-cache.org>
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From: Poul-Henning Kamp <phk@phk.freebsd.dk>
References: <20161213173327.C1F7D1714B@welho-filter2.welho.com> <20161213175419.GA7943@LK-Perkele-V2.elisa-laajakaista.fi> <25434.1481665395@critter.freebsd.dk> <201612140628.uBE6SO3L025885@shell.siilo.fmi.fi> <36792.1481701328@critter.freebsd.dk> <CACweHNDKgWQewZHb=Kz3_2=41M58sY5472Q5OwpqPLxorvkzHQ@mail.gmail.com> <37223.1481707288@critter.freebsd.dk> <3a65ca44-f652-3b14-6d64-46f35b32df57@isode.com> <55880.1481711031@critter.freebsd.dk> <95057a05-6714-9154-8cf8-7cd302c86715@gmx.de> <60914.1481712680@critter.freebsd.dk> <CABkgnnWzOhkznH2HzweNegYo4dDHE+DT0PM=eCSvVr+-Wkup1A@mail.gmail.com> <63340.1481720099@critter.freebsd.dk> <C8F21FA8-8B03-4E9C-B0E8-CD3C9CF028CE@mnot.net> <56063.1482509609@critter.freebsd.dk> <2C87FAB2-33B3-44FE-A2FB-EB0BD384E87F@mnot.net> <79a43ec2-9fb6-3f32-2326-070896827bd4@gmx.de>
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Subject: Re: Unicode escape sequence | Re: draft-ietf-httpbis-header-structure-00, unicode range
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--------
In message <79a43ec2-9fb6-3f32-2326-070896827bd4@gmx.de>, Julian Reschke writes
:

>> There is -- RFC5987 encoding. Not pretty or efficient, but
>> implemented and interoperable. Used in Content-Disposition, Link
>> (although not much), and not much else AFAIK (Julian?).
>
>It's used in the new Digest spec, but I don't believe it's implemented yet.

(RFC5987 uses %XX and UTF-8)

BCP137 doesn't really say anything about that, except a mild scorn for
UTF8 in general in preference for 'human readable' unicode points, and
I unless we want to incorporate RFC5987 into header-structure, we should
probably lean more on BCP137.

I asked previously if header-structure should incorporate RFC5987,
but I understodd the answer as "don't bother" ?

(The main problem in absorbing RFC5987 is that a trailing '*' on a
dictionary key gets a special meaning, and '*' is a valid character
in a RFC7230::token on which I based header-structure's identifier.)

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.