Mercurial > hg
view tests/test-wireproto-command-heads.t @ 39814:d059cb669632
wireprotov2: allow multiple fields to follow revision maps
The *data wire protocol commands emit a series of CBOR values.
Because revision/delta data may be large, their data is emitted
outside the map as a top-level bytestring value.
Before this commit, we'd emit a single optional bytestring
value after the revision descriptor map. This got the job done.
But it was limiting in that we could only send a single field.
And, it required the consumer to know that the presence of a
key in the map implied the existence of a following bytestring
value.
This commit changes the encoding strategy so top-level bytestring
values in the stream are explicitly denoted in a "fieldsfollowing"
key. This key contains an array defining what fields that follow
and the expected size of each field.
By defining things this way, we can easily send N bytestring
values without any ambiguity about their order. In addition,
clients only need to know how to parse ``fieldsfollowing`` to
know if extra values are present.
Because this breaks backwards compatibility, we've bumped the version
number of the wire protocol version 2 API endpoint.
Differential Revision: https://phab.mercurial-scm.org/D4620
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 20 Sep 2018 12:57:23 -0700 |
parents | 07b58266bce3 |
children | 393e44324037 |
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$ . $TESTDIR/wireprotohelpers.sh $ hg init server $ enablehttpv2 server $ cd server $ hg debugdrawdag << EOF > H I J > | | | > E F G > | |/ > C D > |/ > B > | > A > EOF $ hg phase --force --secret J $ hg phase --public E $ hg log -r 'E + H + I + G + J' -T '{rev}:{node} {desc} {phase}\n' 4:78d2dca436b2f5b188ac267e29b81e07266d38fc E public 7:ae492e36b0c8339ffaf328d00b85b4525de1165e H draft 8:1d6f6b91d44aaba6d5e580bc30a9948530dbe00b I draft 6:29446d2dc5419c5f97447a8bc062e4cc328bf241 G draft 9:dec04b246d7cbb670c6689806c05ad17c835284e J secret $ hg serve -p $HGPORT -d --pid-file hg.pid -E error.log $ cat hg.pid > $DAEMON_PIDS All non-secret heads returned by default $ sendhttpv2peer << EOF > command heads > EOF creating http peer for wire protocol version 2 sending heads command s> POST /api/exp-http-v2-0002/ro/heads HTTP/1.1\r\n s> Accept-Encoding: identity\r\n s> accept: application/mercurial-exp-framing-0005\r\n s> content-type: application/mercurial-exp-framing-0005\r\n s> content-length: 20\r\n s> host: $LOCALIP:$HGPORT\r\n (glob) s> user-agent: Mercurial debugwireproto\r\n s> \r\n s> \x0c\x00\x00\x01\x00\x01\x01\x11\xa1DnameEheads s> makefile('rb', None) s> HTTP/1.1 200 OK\r\n s> Server: testing stub value\r\n s> Date: $HTTP_DATE$\r\n s> Content-Type: application/mercurial-exp-framing-0005\r\n s> Transfer-Encoding: chunked\r\n s> \r\n s> 13\r\n s> \x0b\x00\x00\x01\x00\x02\x011 s> \xa1FstatusBok s> \r\n received frame(size=11; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=continuation) s> 48\r\n s> @\x00\x00\x01\x00\x02\x001 s> \x83T\x1dok\x91\xd4J\xab\xa6\xd5\xe5\x80\xbc0\xa9\x94\x850\xdb\xe0\x0bT\xaeI.6\xb0\xc83\x9f\xfa\xf3(\xd0\x0b\x85\xb4R]\xe1\x16^T)Dm-\xc5A\x9c_\x97Dz\x8b\xc0b\xe4\xcc2\x8b\xf2A s> \r\n received frame(size=64; request=1; stream=2; streamflags=; type=command-response; flags=continuation) s> 8\r\n s> \x00\x00\x00\x01\x00\x02\x002 s> \r\n s> 0\r\n s> \r\n received frame(size=0; request=1; stream=2; streamflags=; type=command-response; flags=eos) response: [ b'\x1dok\x91\xd4J\xab\xa6\xd5\xe5\x80\xbc0\xa9\x94\x850\xdb\xe0\x0b', b'\xaeI.6\xb0\xc83\x9f\xfa\xf3(\xd0\x0b\x85\xb4R]\xe1\x16^', b')Dm-\xc5A\x9c_\x97Dz\x8b\xc0b\xe4\xcc2\x8b\xf2A' ] Requesting just the public heads works $ sendhttpv2peer << EOF > command heads > publiconly 1 > EOF creating http peer for wire protocol version 2 sending heads command s> POST /api/exp-http-v2-0002/ro/heads HTTP/1.1\r\n s> Accept-Encoding: identity\r\n s> accept: application/mercurial-exp-framing-0005\r\n s> content-type: application/mercurial-exp-framing-0005\r\n s> content-length: 39\r\n s> host: $LOCALIP:$HGPORT\r\n (glob) s> user-agent: Mercurial debugwireproto\r\n s> \r\n s> \x1f\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa1JpubliconlyA1DnameEheads s> makefile('rb', None) s> HTTP/1.1 200 OK\r\n s> Server: testing stub value\r\n s> Date: $HTTP_DATE$\r\n s> Content-Type: application/mercurial-exp-framing-0005\r\n s> Transfer-Encoding: chunked\r\n s> \r\n s> 13\r\n s> \x0b\x00\x00\x01\x00\x02\x011 s> \xa1FstatusBok s> \r\n received frame(size=11; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=continuation) s> 1e\r\n s> \x16\x00\x00\x01\x00\x02\x001 s> \x81Tx\xd2\xdc\xa46\xb2\xf5\xb1\x88\xac&~)\xb8\x1e\x07&m8\xfc s> \r\n received frame(size=22; request=1; stream=2; streamflags=; type=command-response; flags=continuation) s> 8\r\n s> \x00\x00\x00\x01\x00\x02\x002 s> \r\n s> 0\r\n s> \r\n received frame(size=0; request=1; stream=2; streamflags=; type=command-response; flags=eos) response: [ b'x\xd2\xdc\xa46\xb2\xf5\xb1\x88\xac&~)\xb8\x1e\x07&m8\xfc' ] $ cat error.log