tests/test-wireproto-command-changesetdata.t

httppeer: report http statistics

Now that keepalive.py records HTTP request count and the
number of bytes sent and received as part of performing those
requests, we can easily print a report on the activity when
closing a peer instance!

Exact byte counts are globbed in tests because they are influenced
by non-deterministic things, such as hostnames and port numbers.
Plus, the exact byte count isn't too important anyway.

I feel obliged to note that printing the byte count could have
security implications. e.g. if sending a password via HTTP basic
auth, the length of that password will influence the byte count
and the reporting of the byte count could be a side-channel leak
of the password length. I /think/ this is beyond our threshold
for concern. But if we think it poses a problem, we can teach the
byte count logging code to e.g. ignore sensitive HTTP request
headers. We could also consider not reporting the byte count of
request headers altogether. But since the wire protocol uses HTTP
headers for sending command arguments, it is kind of important to
report their size.

Differential Revision: https://phab.mercurial-scm.org/D4858

  $ . $TESTDIR/wireprotohelpers.sh

  $ hg init server
  $ enablehttpv2 server
  $ cd server
  $ cat >> .hg/hgrc << EOF
  > [phases]
  > publish = false
  > EOF
  $ echo a0 > a
  $ echo b0 > b

  $ hg -q commit -A -m 'commit 0'

  $ echo a1 > a
  $ echo b1 > b
  $ hg commit -m 'commit 1'
  $ echo b2 > b
  $ hg commit -m 'commit 2'
  $ hg phase --public -r .

  $ hg -q up -r 0
  $ echo a2 > a
  $ hg commit -m 'commit 3'
  created new head

  $ hg log -G -T '{rev}:{node} {desc}\n'
  @  3:eae5f82c2e622368d27daecb76b7e393d0f24211 commit 3
  |
  | o  2:0bb8ad894a15b15380b2a2a5b183e20f2a4b28dd commit 2
  | |
  | o  1:7592917e1c3e82677cb0a4bc715ca25dd12d28c1 commit 1
  |/
  o  0:3390ef850073fbc2f0dfff2244342c8e9229013a commit 0
  

  $ hg serve -p $HGPORT -d --pid-file hg.pid -E error.log
  $ cat hg.pid > $DAEMON_PIDS

No arguments is an invalid request

  $ sendhttpv2peer << EOF
  > command changesetdata
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 28\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     \x14\x00\x00\x01\x00\x01\x01\x11\xa1DnameMchangesetdata
  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>     49\r\n
  s>     A\x00\x00\x01\x00\x02\x012
  s>     \xa2Eerror\xa1GmessageX"noderange or nodes must be definedFstatusEerror
  s>     \r\n
  received frame(size=65; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=eos)
  s>     0\r\n
  s>     \r\n
  abort: noderange or nodes must be defined!
  [255]

Empty noderange heads results in an error

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     noderange eval:[[],[]]
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 47\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     \'\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa1Inoderange\x82\x80\x80DnameMchangesetdata
  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>     51\r\n
  s>     I\x00\x00\x01\x00\x02\x012
  s>     \xa2Eerror\xa1GmessageX*heads in noderange request cannot be emptyFstatusEerror
  s>     \r\n
  received frame(size=73; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=eos)
  s>     0\r\n
  s>     \r\n
  abort: heads in noderange request cannot be empty!
  [255]

nodesdepth requires nodes argument

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     nodesdepth 42
  >     noderange eval:[[], [b'ignored']]
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 69\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     =\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Inoderange\x82\x80\x81GignoredJnodesdepthB42DnameMchangesetdata
  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>     4d\r\n
  s>     E\x00\x00\x01\x00\x02\x012
  s>     \xa2Eerror\xa1GmessageX&nodesdepth requires the nodes argumentFstatusEerror
  s>     \r\n
  received frame(size=69; request=1; stream=2; streamflags=stream-begin; type=command-response; flags=eos)
  s>     0\r\n
  s>     \r\n
  abort: nodesdepth requires the nodes argument!
  [255]

Sending just noderange heads sends all revisions

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     noderange eval:[[], [b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']]
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 89\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     Q\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa1Inoderange\x82\x80\x82T\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11DnameMchangesetdata
  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>     81\r\n
  s>     y\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x04\xa1DnodeT3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:\xa1DnodeTu\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1\xa1DnodeT\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd\xa1DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11
  s>     \r\n
  received frame(size=121; 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: gen[
    {
      b'totalitems': 4
    },
    {
      b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:'
    },
    {
      b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1'
    },
    {
      b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd'
    },
    {
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Sending root nodes limits what data is sent

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     noderange eval:[[b'\x33\x90\xef\x85\x00\x73\xfb\xc2\xf0\xdf\xff\x22\x44\x34\x2c\x8e\x92\x29\x01\x3a'], [b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd']]
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 89\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     Q\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa1Inoderange\x82\x81T3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:\x81T\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddDnameMchangesetdata
  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>     4b\r\n
  s>     C\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x02\xa1DnodeTu\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1\xa1DnodeT\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd
  s>     \r\n
  received frame(size=67; 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: gen[
    {
      b'totalitems': 2
    },
    {
      b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1'
    },
    {
      b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Requesting data on a single node by node works

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     nodes eval:[b'\x33\x90\xef\x85\x00\x73\xfb\xc2\xf0\xdf\xff\x22\x44\x34\x2c\x8e\x92\x29\x01\x3a']
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 62\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     6\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa1Enodes\x81T3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:DnameMchangesetdata
  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>     30\r\n
  s>     (\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x01\xa1DnodeT3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:
  s>     \r\n
  received frame(size=40; 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: gen[
    {
      b'totalitems': 1
    },
    {
      b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Specifying a noderange and nodes takes union

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     noderange eval:[[b'\x75\x92\x91\x7e\x1c\x3e\x82\x67\x7c\xb0\xa4\xbc\x71\x5c\xa2\x5d\xd1\x2d\x28\xc1'], [b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd']]
  >     nodes eval:[b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 117\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     m\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Inoderange\x82\x81Tu\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1\x81T\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddEnodes\x81T\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11DnameMchangesetdata
  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>     4b\r\n
  s>     C\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x02\xa1DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11\xa1DnodeT\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd
  s>     \r\n
  received frame(size=67; 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: gen[
    {
      b'totalitems': 2
    },
    {
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11'
    },
    {
      b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

nodesdepth of 1 limits to exactly requested nodes

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     nodes eval:[b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']
  >     nodesdepth eval:1
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 74\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     B\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Enodes\x81T\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11Jnodesdepth\x01DnameMchangesetdata
  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>     30\r\n
  s>     (\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x01\xa1DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11
  s>     \r\n
  received frame(size=40; 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: gen[
    {
      b'totalitems': 1
    },
    {
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

nodesdepth of 2 limits to first ancestor

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     nodes eval:[b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']
  >     nodesdepth eval:2
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 74\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     B\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Enodes\x81T\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11Jnodesdepth\x02DnameMchangesetdata
  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>     4b\r\n
  s>     C\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x02\xa1DnodeT3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:\xa1DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11
  s>     \r\n
  received frame(size=67; 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: gen[
    {
      b'totalitems': 2
    },
    {
      b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:'
    },
    {
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

nodesdepth with multiple nodes

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     nodes eval:[b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11', b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd']
  >     nodesdepth eval:2
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 95\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     W\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Enodes\x82T\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11T\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddJnodesdepth\x02DnameMchangesetdata
  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>     81\r\n
  s>     y\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x04\xa1DnodeT3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:\xa1DnodeTu\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1\xa1DnodeT\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd\xa1DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11
  s>     \r\n
  received frame(size=121; 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: gen[
    {
      b'totalitems': 4
    },
    {
      b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:'
    },
    {
      b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1'
    },
    {
      b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd'
    },
    {
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Parents data is transferred upon request

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     fields eval:[b'parents']
  >     nodes eval:[b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 78\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     F\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Ffields\x81GparentsEnodes\x81T\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11DnameMchangesetdata
  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>     63\r\n
  s>     [\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x01\xa2DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11Gparents\x82T3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00
  s>     \r\n
  received frame(size=91; 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: gen[
    {
      b'totalitems': 1
    },
    {
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11',
      b'parents': [
        b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:',
        b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
      ]
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Phase data is transferred upon request

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     fields eval:[b'phase']
  >     nodes eval:[b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd']
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 76\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     D\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Ffields\x81EphaseEnodes\x81T\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddDnameMchangesetdata
  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>     3d\r\n
  s>     5\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x01\xa2DnodeT\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddEphaseFpublic
  s>     \r\n
  received frame(size=53; 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: gen[
    {
      b'totalitems': 1
    },
    {
      b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd',
      b'phase': b'public'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Revision data is transferred upon request

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     fields eval:[b'revision']
  >     nodes eval:[b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 79\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     G\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Ffields\x81HrevisionEnodes\x81T\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11DnameMchangesetdata
  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>     8c\r\n
  s>     \x84\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x01\xa2Ofieldsfollowing\x81\x82Hrevision\x18=DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11X=1b74476799ec8318045db759b1b4bcc9b839d0aa\n
  s>     test\n
  s>     0 0\n
  s>     a\n
  s>     \n
  s>     commit 3
  s>     \r\n
  received frame(size=132; 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: gen[
    {
      b'totalitems': 1
    },
    {
      b'fieldsfollowing': [
        [
          b'revision',
          61
        ]
      ],
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11'
    },
    b'1b74476799ec8318045db759b1b4bcc9b839d0aa\ntest\n0 0\na\n\ncommit 3'
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Bookmarks key isn't present if no bookmarks data

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     fields eval:[b'bookmarks']
  >     noderange eval:[[], [b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']]
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 107\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     c\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Ffields\x81IbookmarksInoderange\x82\x80\x82T\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11DnameMchangesetdata
  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>     81\r\n
  s>     y\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x04\xa1DnodeT3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:\xa1DnodeTu\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1\xa1DnodeT\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd\xa1DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11
  s>     \r\n
  received frame(size=121; 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: gen[
    {
      b'totalitems': 4
    },
    {
      b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:'
    },
    {
      b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1'
    },
    {
      b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd'
    },
    {
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Bookmarks are sent when requested

  $ hg -R ../server bookmark -r 0bb8ad894a15b15380b2a2a5b183e20f2a4b28dd book-1
  $ hg -R ../server bookmark -r eae5f82c2e622368d27daecb76b7e393d0f24211 book-2
  $ hg -R ../server bookmark -r eae5f82c2e622368d27daecb76b7e393d0f24211 book-3

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     fields eval:[b'bookmarks']
  >     noderange eval:[[], [b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']]
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 107\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     c\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Ffields\x81IbookmarksInoderange\x82\x80\x82T\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11DnameMchangesetdata
  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>     ac\r\n
  s>     \xa4\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x04\xa1DnodeT3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:\xa1DnodeTu\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1\xa2Ibookmarks\x81Fbook-1DnodeT\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd\xa2Ibookmarks\x82Fbook-2Fbook-3DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11
  s>     \r\n
  received frame(size=164; 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: gen[
    {
      b'totalitems': 4
    },
    {
      b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:'
    },
    {
      b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1'
    },
    {
      b'bookmarks': [
        b'book-1'
      ],
      b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd'
    },
    {
      b'bookmarks': [
        b'book-2',
        b'book-3'
      ],
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Bookmarks are sent when we make a no-new-revisions request

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     fields eval:[b'bookmarks', b'revision']
  >     noderange eval:[[b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11'], [b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']]
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 137\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     \x81\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Ffields\x82IbookmarksHrevisionInoderange\x82\x81T\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11\x82T\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11DnameMchangesetdata
  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>     14b\r\n
  s>     C\x01\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x02\xa2Ofieldsfollowing\x81\x82Hrevision\x18?DnodeTu\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1X?7f144aea0ba742713887b564d57e9d12f12ff382\n
  s>     test\n
  s>     0 0\n
  s>     a\n
  s>     b\n
  s>     \n
  s>     commit 1\xa3Ibookmarks\x81Fbook-1Ofieldsfollowing\x81\x82Hrevision\x18=DnodeT\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddX=37f0a2d1c28ffe4b879109a7d1bbf8f07b3c763b\n
  s>     test\n
  s>     0 0\n
  s>     b\n
  s>     \n
  s>     commit 2\xa2Ibookmarks\x82Fbook-2Fbook-3DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11
  s>     \r\n
  received frame(size=323; 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: gen[
    {
      b'totalitems': 2
    },
    {
      b'fieldsfollowing': [
        [
          b'revision',
          63
        ]
      ],
      b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1'
    },
    b'7f144aea0ba742713887b564d57e9d12f12ff382\ntest\n0 0\na\nb\n\ncommit 1',
    {
      b'bookmarks': [
        b'book-1'
      ],
      b'fieldsfollowing': [
        [
          b'revision',
          61
        ]
      ],
      b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd'
    },
    b'37f0a2d1c28ffe4b879109a7d1bbf8f07b3c763b\ntest\n0 0\nb\n\ncommit 2',
    {
      b'bookmarks': [
        b'book-2',
        b'book-3'
      ],
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11'
    }
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Multiple fields can be transferred

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     fields eval:[b'parents', b'revision']
  >     nodes eval:[b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 87\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     O\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Ffields\x82GparentsHrevisionEnodes\x81T\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11DnameMchangesetdata
  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>     bf\r\n
  s>     \xb7\x00\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x01\xa3Ofieldsfollowing\x81\x82Hrevision\x18=DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11Gparents\x82T3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00X=1b74476799ec8318045db759b1b4bcc9b839d0aa\n
  s>     test\n
  s>     0 0\n
  s>     a\n
  s>     \n
  s>     commit 3
  s>     \r\n
  received frame(size=183; 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: gen[
    {
      b'totalitems': 1
    },
    {
      b'fieldsfollowing': [
        [
          b'revision',
          61
        ]
      ],
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11',
      b'parents': [
        b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:',
        b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
      ]
    },
    b'1b74476799ec8318045db759b1b4bcc9b839d0aa\ntest\n0 0\na\n\ncommit 3'
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

Base nodes have just their metadata (e.g. phase) transferred

  $ sendhttpv2peer << EOF
  > command changesetdata
  >     fields eval:[b'phase', b'parents', b'revision']
  >     noderange eval:[[b'\x33\x90\xef\x85\x00\x73\xfb\xc2\xf0\xdf\xff\x22\x44\x34\x2c\x8e\x92\x29\x01\x3a'], [b'\x0b\xb8\xad\x89\x4a\x15\xb1\x53\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f\x2a\x4b\x28\xdd', b'\xea\xe5\xf8\x2c\x2e\x62\x23\x68\xd2\x7d\xae\xcb\x76\xb7\xe3\x93\xd0\xf2\x42\x11']]
  > EOF
  creating http peer for wire protocol version 2
  sending changesetdata command
  s>     POST /api/exp-http-v2-0002/ro/changesetdata 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: 141\r\n
  s>     host: $LOCALIP:$HGPORT\r\n (glob)
  s>     user-agent: Mercurial debugwireproto\r\n
  s>     \r\n
  s>     \x85\x00\x00\x01\x00\x01\x01\x11\xa2Dargs\xa2Ffields\x83EphaseGparentsHrevisionInoderange\x82\x81T3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:\x82T\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11DnameMchangesetdata
  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>     263\r\n
  s>     [\x02\x00\x01\x00\x02\x001
  s>     \xa1Jtotalitems\x03\xa2DnodeT3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:EphaseFpublic\xa4Ofieldsfollowing\x81\x82Hrevision\x18?DnodeTu\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1Gparents\x82T3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00EphaseFpublicX?7f144aea0ba742713887b564d57e9d12f12ff382\n
  s>     test\n
  s>     0 0\n
  s>     a\n
  s>     b\n
  s>     \n
  s>     commit 1\xa4Ofieldsfollowing\x81\x82Hrevision\x18=DnodeT\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xddGparents\x82Tu\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00EphaseFpublicX=37f0a2d1c28ffe4b879109a7d1bbf8f07b3c763b\n
  s>     test\n
  s>     0 0\n
  s>     b\n
  s>     \n
  s>     commit 2\xa4Ofieldsfollowing\x81\x82Hrevision\x18=DnodeT\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11Gparents\x82T3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:T\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00EphaseEdraftX=1b74476799ec8318045db759b1b4bcc9b839d0aa\n
  s>     test\n
  s>     0 0\n
  s>     a\n
  s>     \n
  s>     commit 3
  s>     \r\n
  received frame(size=603; 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: gen[
    {
      b'totalitems': 3
    },
    {
      b'node': b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:',
      b'phase': b'public'
    },
    {
      b'fieldsfollowing': [
        [
          b'revision',
          63
        ]
      ],
      b'node': b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1',
      b'parents': [
        b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:',
        b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
      ],
      b'phase': b'public'
    },
    b'7f144aea0ba742713887b564d57e9d12f12ff382\ntest\n0 0\na\nb\n\ncommit 1',
    {
      b'fieldsfollowing': [
        [
          b'revision',
          61
        ]
      ],
      b'node': b'\x0b\xb8\xad\x89J\x15\xb1S\x80\xb2\xa2\xa5\xb1\x83\xe2\x0f*K(\xdd',
      b'parents': [
        b'u\x92\x91~\x1c>\x82g|\xb0\xa4\xbcq\\\xa2]\xd1-(\xc1',
        b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
      ],
      b'phase': b'public'
    },
    b'37f0a2d1c28ffe4b879109a7d1bbf8f07b3c763b\ntest\n0 0\nb\n\ncommit 2',
    {
      b'fieldsfollowing': [
        [
          b'revision',
          61
        ]
      ],
      b'node': b'\xea\xe5\xf8,.b#h\xd2}\xae\xcbv\xb7\xe3\x93\xd0\xf2B\x11',
      b'parents': [
        b'3\x90\xef\x85\x00s\xfb\xc2\xf0\xdf\xff"D4,\x8e\x92)\x01:',
        b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
      ],
      b'phase': b'draft'
    },
    b'1b74476799ec8318045db759b1b4bcc9b839d0aa\ntest\n0 0\na\n\ncommit 3'
  ]
  (sent 2 HTTP requests and * bytes; received * bytes in responses) (glob)

  $ cat error.log