From: Duy Nguyen <pclouds@gmail.com>
To: Stefan Beller <sbeller@google.com>
Cc: Junio C Hamano <gitster@pobox.com>,
Git Mailing List <git@vger.kernel.org>
Subject: Re: [PATCH] protocol upload-pack-v2
Date: Sat, 7 Mar 2015 06:55:17 +0700 [thread overview]
Message-ID: <CACsJy8ARDgjBLxYmfyrVcCb5WMnG=w6Ro_j+vVe=Sk6pEfR=Cw@mail.gmail.com> (raw)
In-Reply-To: <1425685087-21633-1-git-send-email-sbeller@google.com>
I'm still wondering if we should reserve more from the packet length.
We have used length 0000 for pkt-flush. Shawn pointed out that we
still have 0001, 0002 and 0003 but we may use some of them to avoid
abuse of pkt-flush in some cases. Perhaps we could limit packet length
to 0xfff0, so we have 0xfff1-0xffff to assign special meanings in
future, if we have to.
On Sat, Mar 7, 2015 at 6:38 AM, Stefan Beller <sbeller@google.com> wrote:
> +In version 2, when the client initially connects, the server
> +immediately sends its capabilities to the client. Then the client must
> +send the list of server capabilities it wants to use to the server.
> +
> + S: 00XXcapabilities 4\n
> + S: 00XXcap:lang\n
> + S: 00XXcap:thin-pack\n
> + S: 00XXcap:ofs-delta\n
> + S: 00XXagent:agent=git/2:3.4.5+custom-739-gb850f98\n
> +
> + C: 00XXcapabilities 3
> + C: 00XXcap:thin-pack\n
> + C: 00XXcap:ofs-delta\n
> + C: 00XXcap:lang=en\n
> + C: 00XXagent:agent=git/custom_string\n
> +
> +----
> + cap = PKT-LINE("capabilities" SP size LF list)
> + size = *DIGIT
> + capability-list = *(capability) [agent LF]
> + capability = "cap:" keyvaluepair LF
> + agent = keyvaluepair LF
> + keyvaluepair = 1*(LC_ALPHA / DIGIT / "-" / "_" / "=")
If we send one cap per pkt-line, cap can contain spaces. The question
is, should we allow them?
Ending cap lines with LF seems redudant because we already know the line length.
> + LC_ALPHA = %x61-7A
> +----
> +
> +The client MUST ignore any data before the pkt-line starting with "capabilities"
> +for future easy of extension.
> +
> +The server MUST advertise "size" as the decimal number of lines following
> +the "capabilities" line. This includes lines starting "cap:" and "agent:" for now.
> +The client MUST ignore lines which start with an unknown pattern.
I think the common pattern in our protocol is to end these with a
pkt-flush, instead of send the number of items upfront. If we do that
we don't have to specify "cap:" or "agent:" either. All pkt-lines
until pkt-flush at the beginning of v2 are cap lines. And agent is
just another "capability".
--
Duy
next prev parent reply other threads:[~2015-03-06 23:55 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-24 3:12 [RFC/PATCH 0/3] protocol v2 Stefan Beller
2015-02-24 3:12 ` [PATCH 1/3] Document protocol capabilities extension Stefan Beller
2015-02-24 3:12 ` [PATCH 2/3] receive-pack: add advertisement of different protocol options Stefan Beller
2015-02-24 3:12 ` [PATCH 3/3] receive-pack: enable protocol v2 Stefan Beller
2015-02-24 4:02 ` [RFC/PATCH 0/3] " Duy Nguyen
2015-02-24 5:40 ` Stefan Beller
2015-02-24 6:15 ` Junio C Hamano
2015-02-24 23:37 ` Stefan Beller
2015-02-25 12:44 ` Duy Nguyen
2015-02-25 18:04 ` Junio C Hamano
2015-02-26 7:31 ` Stefan Beller
2015-02-26 10:15 ` Duy Nguyen
2015-02-26 20:08 ` Stefan Beller
[not found] ` <CACsJy8DOS_999ZgW7TqsH-dkrUFpjZf0TFQeFUt9s0bNhHY0Bw@mail.gmail.com>
2015-02-27 22:20 ` Stefan Beller
2015-02-26 20:13 ` Junio C Hamano
2015-02-27 1:26 ` Stefan Beller
2015-02-27 2:15 ` Stefan Beller
2015-02-27 23:05 ` Junio C Hamano
2015-02-27 23:44 ` Stefan Beller
2015-02-28 0:33 ` Junio C Hamano
2015-02-28 0:46 ` Stefan Beller
2015-02-28 1:01 ` [RFC/PATCH 0/5] protocol v2 for upload-pack Stefan Beller
2015-02-28 1:01 ` [RFC/PATCH 1/5] upload-pack: only accept capabilities on the first "want" line Stefan Beller
2015-02-28 1:01 ` [RFC/PATCH 2/5] upload-pack: support out of band client capability requests Stefan Beller
2015-02-28 7:47 ` Kyle J. McKay
2015-02-28 11:22 ` Duy Nguyen
2015-02-28 22:36 ` Kyle J. McKay
2015-03-01 0:11 ` Duy Nguyen
2015-02-28 11:36 ` Duy Nguyen
2015-02-28 1:01 ` [RFC/PATCH 3/5] connect.c: connect to a remote service with some flags Stefan Beller
2015-02-28 11:11 ` Torsten Bögershausen
2015-03-01 3:22 ` Junio C Hamano
2015-02-28 1:01 ` [RFC/PATCH 4/5] daemon.c: accept extra service arguments Stefan Beller
2015-03-01 3:39 ` Junio C Hamano
2015-02-28 1:01 ` [RFC/PATCH 5/5] WIP/Document the http protocol change Stefan Beller
2015-02-28 12:26 ` Duy Nguyen
2015-03-01 9:11 ` [RFC/PATCH 0/5] protocol v2 for upload-pack Johannes Sixt
2015-03-02 2:58 ` Junio C Hamano
2015-03-02 3:47 ` [RFC/PATCH 0/3] protocol v2 Junio C Hamano
2015-03-02 9:21 ` Duy Nguyen
2015-03-02 9:24 ` Duy Nguyen
2015-03-03 10:33 ` Duy Nguyen
2015-03-03 17:13 ` Junio C Hamano
2015-03-03 19:47 ` Junio C Hamano
2015-03-04 1:54 ` Duy Nguyen
2015-03-04 4:27 ` Shawn Pearce
2015-03-04 12:05 ` Duy Nguyen
2015-03-04 19:10 ` Shawn Pearce
2015-03-05 1:03 ` Stefan Beller
2015-03-05 16:03 ` Stefan Beller
2015-03-24 17:42 ` Stefan Beller
2015-03-24 18:00 ` Junio C Hamano
2015-03-06 23:38 ` [PATCH] protocol upload-pack-v2 Stefan Beller
2015-03-06 23:40 ` Stefan Beller
2015-03-06 23:55 ` Duy Nguyen [this message]
2015-03-07 0:00 ` Duy Nguyen
2015-03-07 0:28 ` Junio C Hamano
2015-03-07 4:28 ` Stefan Beller
2015-03-07 5:21 ` Duy Nguyen
2015-03-08 20:36 ` Junio C Hamano
2015-03-31 19:58 ` Junio C Hamano
2015-04-02 12:37 ` Duy Nguyen
2015-04-02 14:45 ` Junio C Hamano
2015-04-02 22:18 ` Martin Fick
2015-04-02 22:58 ` Junio C Hamano
2015-04-02 23:00 ` Stefan Beller
2015-04-02 23:14 ` Stefan Beller
2015-03-10 1:38 ` Duy Nguyen
2015-03-10 19:36 ` Kyle J. McKay
2015-02-28 0:07 ` [RFC/PATCH 0/3] protocol v2 Duy Nguyen
2015-02-28 0:26 ` Junio C Hamano
2015-03-01 8:41 ` Junio C Hamano
2015-03-01 11:32 ` Duy Nguyen
2015-03-01 19:56 ` Stefan Beller
2015-03-02 1:05 ` David Lang
2015-03-01 23:06 ` Junio C Hamano
2015-03-02 1:09 ` David Lang
2015-03-02 3:10 ` Junio C Hamano
2015-03-01 23:06 ` Philip Oakley
2015-03-02 9:32 ` Duy Nguyen
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