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From: Junio C Hamano <gitster@pobox.com>
To: "Đoàn Trần Công Danh" <congdanhqx@gmail.com>
Cc: git@vger.kernel.org
Subject: Re: [PATCH] mailinfo: strip CR from base64/quoted-printable email
Date: Tue, 20 Apr 2021 19:09:25 -0700	[thread overview]
Message-ID: <xmqqy2dcz8ve.fsf@gitster.g> (raw)
In-Reply-To: <20210421013404.17383-1-congdanhqx@gmail.com> (=?utf-8?B?IsSQ?= =?utf-8?B?b8OgbiBUcuG6p24gQ8O0bmc=?= Danh"'s message of "Wed, 21 Apr 2021 08:34:04 +0700")

Đoàn Trần Công Danh  <congdanhqx@gmail.com> writes:

> When an SMTP server receives an 8-bit email message, possibly with only
> LF as line ending, some of those servers decide to change said LF to
> CRLF.
>
> Some other SMTP servers, when receives an 8-bit email message, decide to
> encoding such message in base64 and/or quoted-printable instead.

encoding -> encode

>
> If an email is transfered through those 2 email servers in order, the
> final recipients will receive an email contains a patch mungled with
> CRLF encoded inside another encoding. Thus, such CR couldn't be dropped
> by mailsplit. Such accidents have been observed in the wild [1].
>
> Let's guess if such CR was added automatically and strip them in
> mailinfo.
>
> [1]: https://nmbug.notmuchmail.org/nmweb/show/m2lf9ejegj.fsf%40guru.guru-group.fi
>
> Signed-off-by: Đoàn Trần Công Danh <congdanhqx@gmail.com>
> ---
>
>  I'm not sure if guessing the heuristic to strip CR is a good approach.
>  I think it's better to pass --keep-cr down from git-am.
>  Let's say --keep-cr=<yes|no|auto>

It matches my instinct to tie this with the existing --keep-cr
option, even though I admit that I haven't thought things through.

.

  reply	other threads:[~2021-04-21  2:09 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-21  1:34 Đoàn Trần Công Danh
2021-04-21  2:09 ` Junio C Hamano [this message]
2021-04-21  3:32 ` brian m. carlson
2021-04-21 12:07   ` Đoàn Trần Công Danh
2021-04-22  1:10     ` brian m. carlson
2021-05-04 17:19 ` [PATCH v2 0/5] Teach am/mailinfo to process quoted CR Đoàn Trần Công Danh
2021-05-04 17:19   ` [PATCH v2 1/5] mailinfo: avoid magic number in option parsing Đoàn Trần Công Danh
2021-05-04 17:19   ` [PATCH v2 2/5] mailinfo: warn if CR found in base64/quoted-printable email Đoàn Trần Công Danh
2021-05-05  3:41     ` Junio C Hamano
2021-05-04 17:20   ` [PATCH v2 3/5] mailinfo: skip quoted CR on user's wish Đoàn Trần Công Danh
2021-05-05  4:12     ` Junio C Hamano
2021-05-05 15:53       ` Đoàn Trần Công Danh
2021-05-04 17:20   ` [PATCH v2 4/5] mailinfo: strip quoted CR on users' wish Đoàn Trần Công Danh
2021-05-05  4:27     ` Junio C Hamano
2021-05-04 17:20   ` [PATCH v2 5/5] am: learn to process quoted lines that ends with CRLF Đoàn Trần Công Danh
2021-05-05  4:31   ` [PATCH v2 0/5] Teach am/mailinfo to process quoted CR Junio C Hamano
2021-05-06 15:02 ` [PATCH v3 0/6] " Đoàn Trần Công Danh
2021-05-06 15:02   ` [PATCH v3 1/6] mailinfo: load default metainfo_charset lazily Đoàn Trần Công Danh
2021-05-06 15:02   ` [PATCH v3 2/6] mailinfo: stop parsing options manually Đoàn Trần Công Danh
2021-05-08 10:44     ` Junio C Hamano
2021-05-06 15:02   ` [PATCH v3 3/6] mailinfo: warn if CR found in decoded base64/QP email Đoàn Trần Công Danh
2021-05-08 10:52     ` Junio C Hamano
2021-05-06 15:02   ` [PATCH v3 4/6] mailinfo: allow squelching quoted CR warning Đoàn Trần Công Danh
2021-05-06 15:02   ` [PATCH v3 5/6] mailinfo: allow stripping quoted CR without warning Đoàn Trần Công Danh
2021-05-06 15:02   ` [PATCH v3 6/6] am: learn to process quoted lines that ends with CRLF Đoàn Trần Công Danh
2021-05-08 10:57   ` [PATCH v3 0/6] Teach am/mailinfo to process quoted CR Junio C Hamano
     [not found] ` <cover.1620309355.git.congdanhqx@gmail.com>
2021-05-06 15:02   ` [PATCH v3 2/6] mailinfo: stop parse options manually Đoàn Trần Công Danh
2021-05-06 15:19     ` Đoàn Trần Công Danh
2021-05-09 17:12 ` [PATCH v4 0/6] Teach am/mailinfo to process quoted CR Đoàn Trần Công Danh
2021-05-09 17:12   ` [PATCH v4 1/6] mailinfo: load default metainfo_charset lazily Đoàn Trần Công Danh
2021-05-09 17:12   ` [PATCH v4 2/6] mailinfo: stop parsing options manually Đoàn Trần Công Danh
2021-05-09 17:12   ` [PATCH v4 3/6] mailinfo: warn if CRLF found in decoded base64/QP email Đoàn Trần Công Danh
2021-05-09 17:12   ` [PATCH v4 4/6] mailinfo: allow squelching quoted CRLF warning Đoàn Trần Công Danh
2021-05-09 17:12   ` [PATCH v4 5/6] mailinfo: allow stripping quoted CR without warning Đoàn Trần Công Danh
2021-05-09 17:12   ` [PATCH v4 6/6] am: learn to process quoted lines that ends with CRLF Đoàn Trần Công Danh

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