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From: Jonathan Nieder <jrnieder@gmail.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: "Max Kirillov" <max@max630.net>,
	git@vger.kernel.org, "Jeff King" <peff@peff.net>,
	"Jelmer Vernooij" <jelmer@jelmer.uk>,
	"Florian Manschwetus" <manschwetus@cs-software-gmbh.de>
Subject: Re: [PATCH] http-backend: treat empty CONTENT_LENGTH as zero
Date: Mon, 10 Sep 2018 21:29:19 -0700
Message-ID: <20180911042919.GE20518@aiede.svl.corp.google.com> (raw)
In-Reply-To: <xmqqo9d4r7j2.fsf@gitster-ct.c.googlers.com>

Junio C Hamano wrote:
> Jonathan Nieder <jrnieder@gmail.com> writes:

>> RFC 3875 (the CGI specification) explains:
>>
>>    The CONTENT_LENGTH variable contains the size of the message-body
>>    attached to the request, if any, in decimal number of octets.  If no
>>    data is attached, then NULL (or unset).
[...]
>> But that specification was written before HTTP/1.1 and chunked
>> encoding.
>
> RFC 3875 is from October 2004, while RFC 2616 (HTTP/1.1) is from
> June 1999; I presume that 3875 only writes down what has already
> been an established practice and that is where the date discrepancy
> comes from.

Yes, CGI 1.1 is from 1995.  More details are at
https://www.w3.org/CGI/.

[...]
>> Fortunately, there's a way out.  Use the HTTP_TRANSFER_ENCODING
>> environment variable to distinguish the two cases.
>
> Cute.
>
> I'm anxious to learn how well this works in practice. Or is this a
> trick you know somebody else's system already uses (in which case,
> that's wonderful)?

Alas, I came up with it today so I don't know yet how well it will
work in practice.

I can poke around a little tomorrow in Apache to sanity-check the
approach.  Results from anyone able to test using various HTTP servers
(lighttpd, etc) would also be very welcome.

Thanks,
Jonathan

  reply index

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-06  6:10 CONTENT_LENGTH can no longer be empty Jonathan Nieder
2018-09-06 19:35 ` [PATCH] http-backend: allow empty CONTENT_LENGTH Max Kirillov
2018-09-06 21:54   ` Junio C Hamano
2018-09-07  3:27     ` Max Kirillov
2018-09-07  3:38       ` Jeff King
2018-09-07  4:20         ` Max Kirillov
2018-09-07  4:59         ` Max Kirillov
2018-09-07  9:49           ` Junio C Hamano
2018-09-08  5:41             ` Max Kirillov
2018-09-09  4:40             ` Max Kirillov
2018-09-06 22:45   ` Jonathan Nieder
2018-09-07  3:36   ` [PATCH v2] " Max Kirillov
2018-09-09  4:10     ` [PATCH v4] " Max Kirillov
2018-09-10  5:25       ` Jonathan Nieder
2018-09-10 13:17         ` Jeff King
2018-09-10 16:37           ` Junio C Hamano
2018-09-10 18:46             ` Jeff King
2018-09-10 20:53         ` [PATCH] http-backend: Treat empty CONTENT_LENGTH as zero Max Kirillov
2018-09-10 21:22           ` Jonathan Nieder
2018-09-11  1:55             ` Jeff King
2018-09-11  2:20               ` Jonathan Nieder
2018-09-11  2:30                 ` Jeff King
2018-09-11  1:58           ` Jeff King
2018-09-11  3:42           ` [PATCH] http-backend: treat " Jonathan Nieder
2018-09-11  4:03             ` Jonathan Nieder
2018-09-11 18:15               ` Junio C Hamano
2018-09-11 18:27                 ` Junio C Hamano
2018-09-12  5:56                 ` Jeff King
2018-09-12  6:26                   ` Jonathan Nieder
2018-09-12 16:10                   ` Junio C Hamano
2018-09-11  4:18             ` Junio C Hamano
2018-09-11  4:29               ` Jonathan Nieder [this message]
2018-09-08  0:19 [PATCH v2] http-backend: allow empty CONTENT_LENGTH Jonathan Nieder
2018-09-08  5:35 ` Max Kirillov
2018-09-08  5:42 ` [PATCH v3] " Max Kirillov
2018-09-10  5:17   ` Jonathan Nieder
2018-09-10 20:36     ` Max Kirillov
2018-09-11  4:06 Jonathan Nieder
2018-09-11 20:33 ` [PATCH v2] http-backend test: make empty CONTENT_LENGTH test more realistic Max Kirillov

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