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computers / news.software.nntp / Re: Usenet Expires Header and Time Format

SubjectAuthor
* Usenet Expires Header and Time FormatPerry Sprague
+- Re: Usenet Expires Header and Time FormatHenning Hucke
+- Re: Usenet Expires Header and Time FormatAdam H. Kerman
`- Re: Usenet Expires Header and Time FormatThomas Hochstein

1
Usenet Expires Header and Time Format

<song19$2sgm9$1@news.mixmin.net>

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https://www.novabbs.com/computers/article-flat.php?id=356&group=news.software.nntp#356

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Path: i2pn2.org!i2pn.org!weretis.net!feeder8.news.weretis.net!news.mixmin.net!.POSTED.2a0b:f4c2:1::1!not-for-mail
From: gol...@shoreline.ga (Perry Sprague)
Newsgroups: news.software.nntp
Subject: Usenet Expires Header and Time Format
Date: Tue, 7 Dec 2021 05:20:26 -0600
Organization: Mixmin
Message-ID: <song19$2sgm9$1@news.mixmin.net>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Injection-Date: Tue, 7 Dec 2021 11:20:10 -0000 (UTC)
Injection-Info: news.mixmin.net; posting-host="2a0b:f4c2:1::1";
logging-data="3031753"; mail-complaints-to="abuse@mixmin.net"
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101
Thunderbird/78.14.0
X-Mozilla-News-Host: snews://news.mixmin.net:563
Content-Language: en-US
 by: Perry Sprague - Tue, 7 Dec 2021 11:20 UTC

After much search I cannot find:

Explicit, legal, complete, authoritative definition of Usenet Time
String Format;

Exactly how to format this for a NNTP 'Expires:' header so that servers
will notice it.

Please advise.

--
Perry S.

Re: Usenet Expires Header and Time Format

<slrnsqul4a.4em.h_hucke+spam.news@sirius.aeon.icebear.cloud>

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From: h_hucke+...@newsmail.aeon.icebear.org (Henning Hucke)
Newsgroups: news.software.nntp
Subject: Re: Usenet Expires Header and Time Format
Date: Tue, 7 Dec 2021 12:33:14 -0000 (UTC)
Organization: aeon: think longer than you thought before
Lines: 33
Message-ID: <slrnsqul4a.4em.h_hucke+spam.news@sirius.aeon.icebear.cloud>
References: <song19$2sgm9$1@news.mixmin.net>
Reply-To: Henning Hucke <h_hucke+news.reply(trick)@newsmail.aeon.icebear.org>
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X-Orig-Path: news.aeon.icebear.cloud!news1.aeon.icebear.cloud!.POSTED.sirius.aeon.icebear.cloud!not-for-mail
Cancel-Lock: sha1:0hTg5lEhigncfhvN9xQcGUOdiEY= sha1:dD21TxxQHqUDAHUSrkIouwKL88U=
Injection-Date: Tue, 7 Dec 2021 12:33:14 -0000 (UTC)
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User-Agent: slrn/1.0.3 (Linux)
 by: Henning Hucke - Tue, 7 Dec 2021 12:33 UTC

On 2021-12-07, Perry Sprague <golf@shoreline.ga> wrote:

> After much search I cannot find:
>
> Explicit, legal, complete, authoritative definition of Usenet Time
> String Format;

This is no NNTP (Network News *Transfer* Protocol) issue but one of
the Netnews Article Format defined in RFC 5536 where the "Expires"
header is defined.

> Exactly how to format this for a NNTP 'Expires:' header so that servers
> will notice it.

The definition of the header directly referres to RFC 5322 (Internet
Message Format) where the date-time format is defined. You possibly
would like to read about (E)BNFs ((Extended) Backus-Naur Forms) possibly
on Wikipedia to understand the definitions.

> Please advise.

RTFM&RFCs!

RFCs are nearly always a good start to search for definitions of
internet standards. The index of RFCs is "rfc-index" which you might
consult in the first place to search it for suitable keywords for what
you are looking for.

Regards
--
Applause, n:
The echo of a platitude from the mouth of a fool.
-- Ambrose Bierce

Re: Usenet Expires Header and Time Format

<soo89r$umi$1@dont-email.me>

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From: ahk...@chinet.com (Adam H. Kerman)
Newsgroups: news.software.nntp
Subject: Re: Usenet Expires Header and Time Format
Date: Tue, 7 Dec 2021 18:14:19 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 20
Message-ID: <soo89r$umi$1@dont-email.me>
References: <song19$2sgm9$1@news.mixmin.net>
Injection-Date: Tue, 7 Dec 2021 18:14:19 -0000 (UTC)
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X-Newsreader: trn 4.0-test77 (Sep 1, 2010)
 by: Adam H. Kerman - Tue, 7 Dec 2021 18:14 UTC

Perry Sprague <golf@shoreline.ga> wrote:

>After much search I cannot find:

>Explicit, legal, complete, authoritative definition of Usenet Time
>String Format;

>Exactly how to format this for a NNTP 'Expires:' header so that servers
>will notice it.

>Please advise.

Accept the fact that it's not your News server. Local policy, not your
Expires header, determines when the article expires. It's actually
unusual that a major News server would honor that header, or the
Supersedes header for that matter. Your local server might honor
cancel-lock, allowing you to cancel your own article injected through
that server, but no other server would honor cancel-lock.

You have zero control over this.

Re: Usenet Expires Header and Time Format

<nsn.20211208000003.2625@scatha.ancalagon.de>

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From: thh...@thh.name (Thomas Hochstein)
Newsgroups: news.software.nntp
Subject: Re: Usenet Expires Header and Time Format
Date: Wed, 08 Dec 2021 00:00:06 +0100
Message-ID: <nsn.20211208000003.2625@scatha.ancalagon.de>
References: <song19$2sgm9$1@news.mixmin.net>
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X-Clacks-Overhead: GNU Terry Pratchett
X-NNTP-Posting-Date: Wed, 08 Dec 2021 00:00:03 +0100
 by: Thomas Hochstein - Tue, 7 Dec 2021 23:00 UTC

Perry Sprague schrieb:

> Exactly how to format this for a NNTP 'Expires:' header so that servers
> will notice it.

You can use the same format as for the Date: header; but servers with
self-expiring spool buffers often won't honor Expires: headers.

1
server_pubkey.txt

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