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docs: new capability to advertise session IDs

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In future patches, we will add the ability for Git servers and clients
to advertise unique session IDs via protocol capabilities. This
allows for easier debugging when both client and server logs are
available.

Signed-off-by: Josh Steadmon <steadmon@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Josh Steadmon 2020-11-11 15:29:24 -08:00 committed by Junio C Hamano
parent e2850a27a9
commit f5cdbe485f
2 changed files with 28 additions and 2 deletions
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17
Documentation/technical/protocol-capabilities.txt
View file

@ -27,8 +27,8 @@ and 'push-cert' capabilities are sent and recognized by the receive-pack
(push to server) process.
The 'ofs-delta' and 'side-band-64k' capabilities are sent and recognized
by both upload-pack and receive-pack protocols. The 'agent' capability
may optionally be sent in both protocols.
by both upload-pack and receive-pack protocols. The 'agent' and 'session-id'
capabilities may optionally be sent in both protocols.
All other capabilities are only recognized by the upload-pack (fetch
from server) process.
@ -365,3 +365,16 @@ If the upload-pack server advertises the 'filter' capability,
fetch-pack may send "filter" commands to request a partial clone
or partial fetch and request that the server omit various objects
from the packfile.
session-id=<session id>
-----------------------
The server may advertise a session ID that can be used to identify this process
across multiple requests. The client may advertise its own session ID back to
the server as well.
Session IDs should be unique to a given process. They must fit within a
packet-line, and must not contain non-printable or whitespace characters. The
current implementation uses trace2 session IDs (see
link:api-trace2.html[api-trace2] for details), but this may change and users of
the session ID should not rely on this fact.

13
Documentation/technical/protocol-v2.txt
View file

@ -492,3 +492,16 @@ form `object-format=X`) to notify the client that the server is able to deal
with objects using hash algorithm X. If not specified, the server is assumed to
only handle SHA-1. If the client would like to use a hash algorithm other than
SHA-1, it should specify its object-format string.
session-id=<session id>
~~~~~~~~~~~~~~~~~~~~~~~
The server may advertise a session ID that can be used to identify this process
across multiple requests. The client may advertise its own session ID back to
the server as well.
Session IDs should be unique to a given process. They must fit within a
packet-line, and must not contain non-printable or whitespace characters. The
current implementation uses trace2 session IDs (see
link:api-trace2.html[api-trace2] for details), but this may change and users of
the session ID should not rely on this fact.