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# wireproto.py - generic wire protocol support functions
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#
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# Copyright 2005-2010 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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import hashlib
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import os
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import tempfile
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from .i18n import _
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from .node import (
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bin,
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hex,
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nullid,
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)
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from . import (
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bundle2,
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changegroup as changegroupmod,
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discovery,
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encoding,
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error,
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exchange,
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peer,
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pushkey as pushkeymod,
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pycompat,
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repository,
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streamclone,
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util,
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wireprototypes,
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)
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urlerr = util.urlerr
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urlreq = util.urlreq
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bytesresponse = wireprototypes.bytesresponse
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ooberror = wireprototypes.ooberror
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pushres = wireprototypes.pushres
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pusherr = wireprototypes.pusherr
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streamres = wireprototypes.streamres
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streamres_legacy = wireprototypes.streamreslegacy
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bundle2requiredmain = _('incompatible Mercurial client; bundle2 required')
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bundle2requiredhint = _('see https://www.mercurial-scm.org/wiki/'
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'IncompatibleClient')
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bundle2required = '%s\n(%s)\n' % (bundle2requiredmain, bundle2requiredhint)
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class remoteiterbatcher(peer.iterbatcher):
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def __init__(self, remote):
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super(remoteiterbatcher, self).__init__()
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self._remote = remote
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def __getattr__(self, name):
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# Validate this method is batchable, since submit() only supports
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# batchable methods.
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fn = getattr(self._remote, name)
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if not getattr(fn, 'batchable', None):
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raise error.ProgrammingError('Attempted to batch a non-batchable '
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'call to %r' % name)
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return super(remoteiterbatcher, self).__getattr__(name)
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def submit(self):
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"""Break the batch request into many patch calls and pipeline them.
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This is mostly valuable over http where request sizes can be
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limited, but can be used in other places as well.
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"""
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# 2-tuple of (command, arguments) that represents what will be
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# sent over the wire.
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requests = []
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# 4-tuple of (command, final future, @batchable generator, remote
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# future).
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results = []
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for command, args, opts, finalfuture in self.calls:
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mtd = getattr(self._remote, command)
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batchable = mtd.batchable(mtd.__self__, *args, **opts)
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commandargs, fremote = next(batchable)
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assert fremote
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requests.append((command, commandargs))
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results.append((command, finalfuture, batchable, fremote))
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if requests:
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self._resultiter = self._remote._submitbatch(requests)
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self._results = results
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def results(self):
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for command, finalfuture, batchable, remotefuture in self._results:
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# Get the raw result, set it in the remote future, feed it
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# back into the @batchable generator so it can be decoded, and
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# set the result on the final future to this value.
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remoteresult = next(self._resultiter)
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remotefuture.set(remoteresult)
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finalfuture.set(next(batchable))
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# Verify our @batchable generators only emit 2 values.
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try:
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next(batchable)
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except StopIteration:
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pass
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else:
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raise error.ProgrammingError('%s @batchable generator emitted '
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'unexpected value count' % command)
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yield finalfuture.value
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# Forward a couple of names from peer to make wireproto interactions
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# slightly more sensible.
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batchable = peer.batchable
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future = peer.future
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# list of nodes encoding / decoding
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def decodelist(l, sep=' '):
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if l:
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return [bin(v) for v in l.split(sep)]
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return []
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def encodelist(l, sep=' '):
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try:
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return sep.join(map(hex, l))
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except TypeError:
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raise
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# batched call argument encoding
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def escapearg(plain):
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return (plain
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.replace(':', ':c')
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.replace(',', ':o')
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.replace(';', ':s')
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.replace('=', ':e'))
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def unescapearg(escaped):
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return (escaped
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.replace(':e', '=')
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.replace(':s', ';')
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.replace(':o', ',')
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.replace(':c', ':'))
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def encodebatchcmds(req):
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"""Return a ``cmds`` argument value for the ``batch`` command."""
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cmds = []
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for op, argsdict in req:
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# Old servers didn't properly unescape argument names. So prevent
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# the sending of argument names that may not be decoded properly by
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# servers.
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assert all(escapearg(k) == k for k in argsdict)
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args = ','.join('%s=%s' % (escapearg(k), escapearg(v))
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for k, v in argsdict.iteritems())
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cmds.append('%s %s' % (op, args))
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return ';'.join(cmds)
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# mapping of options accepted by getbundle and their types
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#
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# Meant to be extended by extensions. It is extensions responsibility to ensure
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# such options are properly processed in exchange.getbundle.
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#
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# supported types are:
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#
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# :nodes: list of binary nodes
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# :csv: list of comma-separated values
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# :scsv: list of comma-separated values return as set
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# :plain: string with no transformation needed.
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gboptsmap = {'heads': 'nodes',
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'bookmarks': 'boolean',
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'common': 'nodes',
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'obsmarkers': 'boolean',
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'phases': 'boolean',
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'bundlecaps': 'scsv',
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'listkeys': 'csv',
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'cg': 'boolean',
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'cbattempted': 'boolean',
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'stream': 'boolean',
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}
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# client side
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class wirepeer(repository.legacypeer):
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"""Client-side interface for communicating with a peer repository.
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Methods commonly call wire protocol commands of the same name.
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See also httppeer.py and sshpeer.py for protocol-specific
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implementations of this interface.
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"""
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# Begin of basewirepeer interface.
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def iterbatch(self):
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return remoteiterbatcher(self)
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@batchable
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def lookup(self, key):
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self.requirecap('lookup', _('look up remote revision'))
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f = future()
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yield {'key': encoding.fromlocal(key)}, f
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d = f.value
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success, data = d[:-1].split(" ", 1)
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if int(success):
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yield bin(data)
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else:
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self._abort(error.RepoError(data))
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@batchable
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def heads(self):
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f = future()
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yield {}, f
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d = f.value
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try:
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yield decodelist(d[:-1])
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except ValueError:
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self._abort(error.ResponseError(_("unexpected response:"), d))
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@batchable
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def known(self, nodes):
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f = future()
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yield {'nodes': encodelist(nodes)}, f
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d = f.value
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try:
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yield [bool(int(b)) for b in d]
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except ValueError:
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self._abort(error.ResponseError(_("unexpected response:"), d))
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@batchable
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def branchmap(self):
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f = future()
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yield {}, f
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d = f.value
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try:
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branchmap = {}
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for branchpart in d.splitlines():
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branchname, branchheads = branchpart.split(' ', 1)
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branchname = encoding.tolocal(urlreq.unquote(branchname))
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branchheads = decodelist(branchheads)
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branchmap[branchname] = branchheads
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yield branchmap
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except TypeError:
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self._abort(error.ResponseError(_("unexpected response:"), d))
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@batchable
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def listkeys(self, namespace):
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if not self.capable('pushkey'):
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yield {}, None
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f = future()
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self.ui.debug('preparing listkeys for "%s"\n' % namespace)
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yield {'namespace': encoding.fromlocal(namespace)}, f
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d = f.value
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self.ui.debug('received listkey for "%s": %i bytes\n'
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% (namespace, len(d)))
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yield pushkeymod.decodekeys(d)
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@batchable
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def pushkey(self, namespace, key, old, new):
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if not self.capable('pushkey'):
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yield False, None
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f = future()
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self.ui.debug('preparing pushkey for "%s:%s"\n' % (namespace, key))
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yield {'namespace': encoding.fromlocal(namespace),
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'key': encoding.fromlocal(key),
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'old': encoding.fromlocal(old),
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'new': encoding.fromlocal(new)}, f
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d = f.value
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d, output = d.split('\n', 1)
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try:
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d = bool(int(d))
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except ValueError:
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raise error.ResponseError(
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_('push failed (unexpected response):'), d)
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for l in output.splitlines(True):
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self.ui.status(_('remote: '), l)
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yield d
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def stream_out(self):
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return self._callstream('stream_out')
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def getbundle(self, source, **kwargs):
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kwargs = pycompat.byteskwargs(kwargs)
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self.requirecap('getbundle', _('look up remote changes'))
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opts = {}
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bundlecaps = kwargs.get('bundlecaps')
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if bundlecaps is not None:
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kwargs['bundlecaps'] = sorted(bundlecaps)
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else:
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bundlecaps = () # kwargs could have it to None
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for key, value in kwargs.iteritems():
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if value is None:
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continue
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keytype = gboptsmap.get(key)
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if keytype is None:
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raise error.ProgrammingError(
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'Unexpectedly None keytype for key %s' % key)
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elif keytype == 'nodes':
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value = encodelist(value)
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elif keytype in ('csv', 'scsv'):
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value = ','.join(value)
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elif keytype == 'boolean':
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value = '%i' % bool(value)
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elif keytype != 'plain':
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raise KeyError('unknown getbundle option type %s'
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% keytype)
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opts[key] = value
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f = self._callcompressable("getbundle", **pycompat.strkwargs(opts))
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if any((cap.startswith('HG2') for cap in bundlecaps)):
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return bundle2.getunbundler(self.ui, f)
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else:
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return changegroupmod.cg1unpacker(f, 'UN')
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def unbundle(self, cg, heads, url):
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'''Send cg (a readable file-like object representing the
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changegroup to push, typically a chunkbuffer object) to the
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remote server as a bundle.
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When pushing a bundle10 stream, return an integer indicating the
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result of the push (see changegroup.apply()).
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When pushing a bundle20 stream, return a bundle20 stream.
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`url` is the url the client thinks it's pushing to, which is
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visible to hooks.
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'''
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if heads != ['force'] and self.capable('unbundlehash'):
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heads = encodelist(['hashed',
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hashlib.sha1(''.join(sorted(heads))).digest()])
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else:
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heads = encodelist(heads)
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if util.safehasattr(cg, 'deltaheader'):
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# this a bundle10, do the old style call sequence
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ret, output = self._callpush("unbundle", cg, heads=heads)
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if ret == "":
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raise error.ResponseError(
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_('push failed:'), output)
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try:
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ret = int(ret)
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except ValueError:
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raise error.ResponseError(
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_('push failed (unexpected response):'), ret)
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for l in output.splitlines(True):
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self.ui.status(_('remote: '), l)
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else:
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# bundle2 push. Send a stream, fetch a stream.
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stream = self._calltwowaystream('unbundle', cg, heads=heads)
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ret = bundle2.getunbundler(self.ui, stream)
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return ret
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# End of basewirepeer interface.
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# Begin of baselegacywirepeer interface.
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def branches(self, nodes):
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n = encodelist(nodes)
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d = self._call("branches", nodes=n)
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try:
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br = [tuple(decodelist(b)) for b in d.splitlines()]
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return br
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except ValueError:
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self._abort(error.ResponseError(_("unexpected response:"), d))
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def between(self, pairs):
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batch = 8 # avoid giant requests
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r = []
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for i in xrange(0, len(pairs), batch):
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n = " ".join([encodelist(p, '-') for p in pairs[i:i + batch]])
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d = self._call("between", pairs=n)
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try:
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r.extend(l and decodelist(l) or [] for l in d.splitlines())
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except ValueError:
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self._abort(error.ResponseError(_("unexpected response:"), d))
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return r
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def changegroup(self, nodes, kind):
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n = encodelist(nodes)
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f = self._callcompressable("changegroup", roots=n)
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return changegroupmod.cg1unpacker(f, 'UN')
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def changegroupsubset(self, bases, heads, kind):
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self.requirecap('changegroupsubset', _('look up remote changes'))
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bases = encodelist(bases)
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heads = encodelist(heads)
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f = self._callcompressable("changegroupsubset",
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bases=bases, heads=heads)
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return changegroupmod.cg1unpacker(f, 'UN')
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# End of baselegacywirepeer interface.
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def _submitbatch(self, req):
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"""run batch request <req> on the server
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Returns an iterator of the raw responses from the server.
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"""
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rsp = self._callstream("batch", cmds=encodebatchcmds(req))
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chunk = rsp.read(1024)
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work = [chunk]
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while chunk:
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while ';' not in chunk and chunk:
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chunk = rsp.read(1024)
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work.append(chunk)
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merged = ''.join(work)
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while ';' in merged:
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one, merged = merged.split(';', 1)
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yield unescapearg(one)
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chunk = rsp.read(1024)
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work = [merged, chunk]
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yield unescapearg(''.join(work))
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def _submitone(self, op, args):
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return self._call(op, **pycompat.strkwargs(args))
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def debugwireargs(self, one, two, three=None, four=None, five=None):
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# don't pass optional arguments left at their default value
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opts = {}
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if three is not None:
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opts[r'three'] = three
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if four is not None:
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opts[r'four'] = four
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return self._call('debugwireargs', one=one, two=two, **opts)
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def _call(self, cmd, **args):
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"""execute <cmd> on the server
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The command is expected to return a simple string.
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returns the server reply as a string."""
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raise NotImplementedError()
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def _callstream(self, cmd, **args):
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"""execute <cmd> on the server
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The command is expected to return a stream. Note that if the
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command doesn't return a stream, _callstream behaves
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differently for ssh and http peers.
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returns the server reply as a file like object.
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"""
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raise NotImplementedError()
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def _callcompressable(self, cmd, **args):
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"""execute <cmd> on the server
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The command is expected to return a stream.
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|
|
The stream may have been compressed in some implementations. This
|
|
|
function takes care of the decompression. This is the only difference
|
|
|
with _callstream.
|
|
|
|
|
|
returns the server reply as a file like object.
|
|
|
"""
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def _callpush(self, cmd, fp, **args):
|
|
|
"""execute a <cmd> on server
|
|
|
|
|
|
The command is expected to be related to a push. Push has a special
|
|
|
return method.
|
|
|
|
|
|
returns the server reply as a (ret, output) tuple. ret is either
|
|
|
empty (error) or a stringified int.
|
|
|
"""
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def _calltwowaystream(self, cmd, fp, **args):
|
|
|
"""execute <cmd> on server
|
|
|
|
|
|
The command will send a stream to the server and get a stream in reply.
|
|
|
"""
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
def _abort(self, exception):
|
|
|
"""clearly abort the wire protocol connection and raise the exception
|
|
|
"""
|
|
|
raise NotImplementedError()
|
|
|
|
|
|
# server side
|
|
|
|
|
|
# wire protocol command can either return a string or one of these classes.
|
|
|
|
|
|
def getdispatchrepo(repo, proto, command):
|
|
|
"""Obtain the repo used for processing wire protocol commands.
|
|
|
|
|
|
The intent of this function is to serve as a monkeypatch point for
|
|
|
extensions that need commands to operate on different repo views under
|
|
|
specialized circumstances.
|
|
|
"""
|
|
|
return repo.filtered('served')
|
|
|
|
|
|
def dispatch(repo, proto, command):
|
|
|
repo = getdispatchrepo(repo, proto, command)
|
|
|
func, spec = commands[command]
|
|
|
args = proto.getargs(spec)
|
|
|
return func(repo, proto, *args)
|
|
|
|
|
|
def options(cmd, keys, others):
|
|
|
opts = {}
|
|
|
for k in keys:
|
|
|
if k in others:
|
|
|
opts[k] = others[k]
|
|
|
del others[k]
|
|
|
if others:
|
|
|
util.stderr.write("warning: %s ignored unexpected arguments %s\n"
|
|
|
% (cmd, ",".join(others)))
|
|
|
return opts
|
|
|
|
|
|
def bundle1allowed(repo, action):
|
|
|
"""Whether a bundle1 operation is allowed from the server.
|
|
|
|
|
|
Priority is:
|
|
|
|
|
|
1. server.bundle1gd.<action> (if generaldelta active)
|
|
|
2. server.bundle1.<action>
|
|
|
3. server.bundle1gd (if generaldelta active)
|
|
|
4. server.bundle1
|
|
|
"""
|
|
|
ui = repo.ui
|
|
|
gd = 'generaldelta' in repo.requirements
|
|
|
|
|
|
if gd:
|
|
|
v = ui.configbool('server', 'bundle1gd.%s' % action)
|
|
|
if v is not None:
|
|
|
return v
|
|
|
|
|
|
v = ui.configbool('server', 'bundle1.%s' % action)
|
|
|
if v is not None:
|
|
|
return v
|
|
|
|
|
|
if gd:
|
|
|
v = ui.configbool('server', 'bundle1gd')
|
|
|
if v is not None:
|
|
|
return v
|
|
|
|
|
|
return ui.configbool('server', 'bundle1')
|
|
|
|
|
|
def supportedcompengines(ui, role):
|
|
|
"""Obtain the list of supported compression engines for a request."""
|
|
|
assert role in (util.CLIENTROLE, util.SERVERROLE)
|
|
|
|
|
|
compengines = util.compengines.supportedwireengines(role)
|
|
|
|
|
|
# Allow config to override default list and ordering.
|
|
|
if role == util.SERVERROLE:
|
|
|
configengines = ui.configlist('server', 'compressionengines')
|
|
|
config = 'server.compressionengines'
|
|
|
else:
|
|
|
# This is currently implemented mainly to facilitate testing. In most
|
|
|
# cases, the server should be in charge of choosing a compression engine
|
|
|
# because a server has the most to lose from a sub-optimal choice. (e.g.
|
|
|
# CPU DoS due to an expensive engine or a network DoS due to poor
|
|
|
# compression ratio).
|
|
|
configengines = ui.configlist('experimental',
|
|
|
'clientcompressionengines')
|
|
|
config = 'experimental.clientcompressionengines'
|
|
|
|
|
|
# No explicit config. Filter out the ones that aren't supposed to be
|
|
|
# advertised and return default ordering.
|
|
|
if not configengines:
|
|
|
attr = 'serverpriority' if role == util.SERVERROLE else 'clientpriority'
|
|
|
return [e for e in compengines
|
|
|
if getattr(e.wireprotosupport(), attr) > 0]
|
|
|
|
|
|
# If compression engines are listed in the config, assume there is a good
|
|
|
# reason for it (like server operators wanting to achieve specific
|
|
|
# performance characteristics). So fail fast if the config references
|
|
|
# unusable compression engines.
|
|
|
validnames = set(e.name() for e in compengines)
|
|
|
invalidnames = set(e for e in configengines if e not in validnames)
|
|
|
if invalidnames:
|
|
|
raise error.Abort(_('invalid compression engine defined in %s: %s') %
|
|
|
(config, ', '.join(sorted(invalidnames))))
|
|
|
|
|
|
compengines = [e for e in compengines if e.name() in configengines]
|
|
|
compengines = sorted(compengines,
|
|
|
key=lambda e: configengines.index(e.name()))
|
|
|
|
|
|
if not compengines:
|
|
|
raise error.Abort(_('%s config option does not specify any known '
|
|
|
'compression engines') % config,
|
|
|
hint=_('usable compression engines: %s') %
|
|
|
', '.sorted(validnames))
|
|
|
|
|
|
return compengines
|
|
|
|
|
|
class commandentry(object):
|
|
|
"""Represents a declared wire protocol command."""
|
|
|
def __init__(self, func, args=''):
|
|
|
self.func = func
|
|
|
self.args = args
|
|
|
|
|
|
def _merge(self, func, args):
|
|
|
"""Merge this instance with an incoming 2-tuple.
|
|
|
|
|
|
This is called when a caller using the old 2-tuple API attempts
|
|
|
to replace an instance. The incoming values are merged with
|
|
|
data not captured by the 2-tuple and a new instance containing
|
|
|
the union of the two objects is returned.
|
|
|
"""
|
|
|
return commandentry(func, args)
|
|
|
|
|
|
# Old code treats instances as 2-tuples. So expose that interface.
|
|
|
def __iter__(self):
|
|
|
yield self.func
|
|
|
yield self.args
|
|
|
|
|
|
def __getitem__(self, i):
|
|
|
if i == 0:
|
|
|
return self.func
|
|
|
elif i == 1:
|
|
|
return self.args
|
|
|
else:
|
|
|
raise IndexError('can only access elements 0 and 1')
|
|
|
|
|
|
class commanddict(dict):
|
|
|
"""Container for registered wire protocol commands.
|
|
|
|
|
|
It behaves like a dict. But __setitem__ is overwritten to allow silent
|
|
|
coercion of values from 2-tuples for API compatibility.
|
|
|
"""
|
|
|
def __setitem__(self, k, v):
|
|
|
if isinstance(v, commandentry):
|
|
|
pass
|
|
|
# Cast 2-tuples to commandentry instances.
|
|
|
elif isinstance(v, tuple):
|
|
|
if len(v) != 2:
|
|
|
raise ValueError('command tuples must have exactly 2 elements')
|
|
|
|
|
|
# It is common for extensions to wrap wire protocol commands via
|
|
|
# e.g. ``wireproto.commands[x] = (newfn, args)``. Because callers
|
|
|
# doing this aren't aware of the new API that uses objects to store
|
|
|
# command entries, we automatically merge old state with new.
|
|
|
if k in self:
|
|
|
v = self[k]._merge(v[0], v[1])
|
|
|
else:
|
|
|
v = commandentry(v[0], v[1])
|
|
|
else:
|
|
|
raise ValueError('command entries must be commandentry instances '
|
|
|
'or 2-tuples')
|
|
|
|
|
|
return super(commanddict, self).__setitem__(k, v)
|
|
|
|
|
|
def commandavailable(self, command, proto):
|
|
|
"""Determine if a command is available for the requested protocol."""
|
|
|
# For now, commands are available for all protocols. So do a simple
|
|
|
# membership test.
|
|
|
return command in self
|
|
|
|
|
|
commands = commanddict()
|
|
|
|
|
|
def wireprotocommand(name, args=''):
|
|
|
"""Decorator to declare a wire protocol command.
|
|
|
|
|
|
``name`` is the name of the wire protocol command being provided.
|
|
|
|
|
|
``args`` is a space-delimited list of named arguments that the command
|
|
|
accepts. ``*`` is a special value that says to accept all arguments.
|
|
|
"""
|
|
|
def register(func):
|
|
|
commands[name] = commandentry(func, args)
|
|
|
return func
|
|
|
return register
|
|
|
|
|
|
@wireprotocommand('batch', 'cmds *')
|
|
|
def batch(repo, proto, cmds, others):
|
|
|
repo = repo.filtered("served")
|
|
|
res = []
|
|
|
for pair in cmds.split(';'):
|
|
|
op, args = pair.split(' ', 1)
|
|
|
vals = {}
|
|
|
for a in args.split(','):
|
|
|
if a:
|
|
|
n, v = a.split('=')
|
|
|
vals[unescapearg(n)] = unescapearg(v)
|
|
|
func, spec = commands[op]
|
|
|
if spec:
|
|
|
keys = spec.split()
|
|
|
data = {}
|
|
|
for k in keys:
|
|
|
if k == '*':
|
|
|
star = {}
|
|
|
for key in vals.keys():
|
|
|
if key not in keys:
|
|
|
star[key] = vals[key]
|
|
|
data['*'] = star
|
|
|
else:
|
|
|
data[k] = vals[k]
|
|
|
result = func(repo, proto, *[data[k] for k in keys])
|
|
|
else:
|
|
|
result = func(repo, proto)
|
|
|
if isinstance(result, ooberror):
|
|
|
return result
|
|
|
|
|
|
# For now, all batchable commands must return bytesresponse or
|
|
|
# raw bytes (for backwards compatibility).
|
|
|
assert isinstance(result, (bytesresponse, bytes))
|
|
|
if isinstance(result, bytesresponse):
|
|
|
result = result.data
|
|
|
res.append(escapearg(result))
|
|
|
|
|
|
return bytesresponse(';'.join(res))
|
|
|
|
|
|
@wireprotocommand('between', 'pairs')
|
|
|
def between(repo, proto, pairs):
|
|
|
pairs = [decodelist(p, '-') for p in pairs.split(" ")]
|
|
|
r = []
|
|
|
for b in repo.between(pairs):
|
|
|
r.append(encodelist(b) + "\n")
|
|
|
|
|
|
return bytesresponse(''.join(r))
|
|
|
|
|
|
@wireprotocommand('branchmap')
|
|
|
def branchmap(repo, proto):
|
|
|
branchmap = repo.branchmap()
|
|
|
heads = []
|
|
|
for branch, nodes in branchmap.iteritems():
|
|
|
branchname = urlreq.quote(encoding.fromlocal(branch))
|
|
|
branchnodes = encodelist(nodes)
|
|
|
heads.append('%s %s' % (branchname, branchnodes))
|
|
|
|
|
|
return bytesresponse('\n'.join(heads))
|
|
|
|
|
|
@wireprotocommand('branches', 'nodes')
|
|
|
def branches(repo, proto, nodes):
|
|
|
nodes = decodelist(nodes)
|
|
|
r = []
|
|
|
for b in repo.branches(nodes):
|
|
|
r.append(encodelist(b) + "\n")
|
|
|
|
|
|
return bytesresponse(''.join(r))
|
|
|
|
|
|
@wireprotocommand('clonebundles', '')
|
|
|
def clonebundles(repo, proto):
|
|
|
"""Server command for returning info for available bundles to seed clones.
|
|
|
|
|
|
Clients will parse this response and determine what bundle to fetch.
|
|
|
|
|
|
Extensions may wrap this command to filter or dynamically emit data
|
|
|
depending on the request. e.g. you could advertise URLs for the closest
|
|
|
data center given the client's IP address.
|
|
|
"""
|
|
|
return bytesresponse(repo.vfs.tryread('clonebundles.manifest'))
|
|
|
|
|
|
wireprotocaps = ['lookup', 'changegroupsubset', 'branchmap', 'pushkey',
|
|
|
'known', 'getbundle', 'unbundlehash', 'batch']
|
|
|
|
|
|
def _capabilities(repo, proto):
|
|
|
"""return a list of capabilities for a repo
|
|
|
|
|
|
This function exists to allow extensions to easily wrap capabilities
|
|
|
computation
|
|
|
|
|
|
- returns a lists: easy to alter
|
|
|
- change done here will be propagated to both `capabilities` and `hello`
|
|
|
command without any other action needed.
|
|
|
"""
|
|
|
# copy to prevent modification of the global list
|
|
|
caps = list(wireprotocaps)
|
|
|
if streamclone.allowservergeneration(repo):
|
|
|
if repo.ui.configbool('server', 'preferuncompressed'):
|
|
|
caps.append('stream-preferred')
|
|
|
requiredformats = repo.requirements & repo.supportedformats
|
|
|
# if our local revlogs are just revlogv1, add 'stream' cap
|
|
|
if not requiredformats - {'revlogv1'}:
|
|
|
caps.append('stream')
|
|
|
# otherwise, add 'streamreqs' detailing our local revlog format
|
|
|
else:
|
|
|
caps.append('streamreqs=%s' % ','.join(sorted(requiredformats)))
|
|
|
if repo.ui.configbool('experimental', 'bundle2-advertise'):
|
|
|
capsblob = bundle2.encodecaps(bundle2.getrepocaps(repo, role='server'))
|
|
|
caps.append('bundle2=' + urlreq.quote(capsblob))
|
|
|
caps.append('unbundle=%s' % ','.join(bundle2.bundlepriority))
|
|
|
|
|
|
if proto.name == 'http-v1':
|
|
|
caps.append('httpheader=%d' %
|
|
|
repo.ui.configint('server', 'maxhttpheaderlen'))
|
|
|
if repo.ui.configbool('experimental', 'httppostargs'):
|
|
|
caps.append('httppostargs')
|
|
|
|
|
|
# FUTURE advertise 0.2rx once support is implemented
|
|
|
# FUTURE advertise minrx and mintx after consulting config option
|
|
|
caps.append('httpmediatype=0.1rx,0.1tx,0.2tx')
|
|
|
|
|
|
compengines = supportedcompengines(repo.ui, util.SERVERROLE)
|
|
|
if compengines:
|
|
|
comptypes = ','.join(urlreq.quote(e.wireprotosupport().name)
|
|
|
for e in compengines)
|
|
|
caps.append('compression=%s' % comptypes)
|
|
|
|
|
|
return caps
|
|
|
|
|
|
# If you are writing an extension and consider wrapping this function. Wrap
|
|
|
# `_capabilities` instead.
|
|
|
@wireprotocommand('capabilities')
|
|
|
def capabilities(repo, proto):
|
|
|
return bytesresponse(' '.join(_capabilities(repo, proto)))
|
|
|
|
|
|
@wireprotocommand('changegroup', 'roots')
|
|
|
def changegroup(repo, proto, roots):
|
|
|
nodes = decodelist(roots)
|
|
|
outgoing = discovery.outgoing(repo, missingroots=nodes,
|
|
|
missingheads=repo.heads())
|
|
|
cg = changegroupmod.makechangegroup(repo, outgoing, '01', 'serve')
|
|
|
gen = iter(lambda: cg.read(32768), '')
|
|
|
return streamres(gen=gen)
|
|
|
|
|
|
@wireprotocommand('changegroupsubset', 'bases heads')
|
|
|
def changegroupsubset(repo, proto, bases, heads):
|
|
|
bases = decodelist(bases)
|
|
|
heads = decodelist(heads)
|
|
|
outgoing = discovery.outgoing(repo, missingroots=bases,
|
|
|
missingheads=heads)
|
|
|
cg = changegroupmod.makechangegroup(repo, outgoing, '01', 'serve')
|
|
|
gen = iter(lambda: cg.read(32768), '')
|
|
|
return streamres(gen=gen)
|
|
|
|
|
|
@wireprotocommand('debugwireargs', 'one two *')
|
|
|
def debugwireargs(repo, proto, one, two, others):
|
|
|
# only accept optional args from the known set
|
|
|
opts = options('debugwireargs', ['three', 'four'], others)
|
|
|
return bytesresponse(repo.debugwireargs(one, two,
|
|
|
**pycompat.strkwargs(opts)))
|
|
|
|
|
|
@wireprotocommand('getbundle', '*')
|
|
|
def getbundle(repo, proto, others):
|
|
|
opts = options('getbundle', gboptsmap.keys(), others)
|
|
|
for k, v in opts.iteritems():
|
|
|
keytype = gboptsmap[k]
|
|
|
if keytype == 'nodes':
|
|
|
opts[k] = decodelist(v)
|
|
|
elif keytype == 'csv':
|
|
|
opts[k] = list(v.split(','))
|
|
|
elif keytype == 'scsv':
|
|
|
opts[k] = set(v.split(','))
|
|
|
elif keytype == 'boolean':
|
|
|
# Client should serialize False as '0', which is a non-empty string
|
|
|
# so it evaluates as a True bool.
|
|
|
if v == '0':
|
|
|
opts[k] = False
|
|
|
else:
|
|
|
opts[k] = bool(v)
|
|
|
elif keytype != 'plain':
|
|
|
raise KeyError('unknown getbundle option type %s'
|
|
|
% keytype)
|
|
|
|
|
|
if not bundle1allowed(repo, 'pull'):
|
|
|
if not exchange.bundle2requested(opts.get('bundlecaps')):
|
|
|
if proto.name == 'http-v1':
|
|
|
return ooberror(bundle2required)
|
|
|
raise error.Abort(bundle2requiredmain,
|
|
|
hint=bundle2requiredhint)
|
|
|
|
|
|
prefercompressed = True
|
|
|
|
|
|
try:
|
|
|
if repo.ui.configbool('server', 'disablefullbundle'):
|
|
|
# Check to see if this is a full clone.
|
|
|
clheads = set(repo.changelog.heads())
|
|
|
changegroup = opts.get('cg', True)
|
|
|
heads = set(opts.get('heads', set()))
|
|
|
common = set(opts.get('common', set()))
|
|
|
common.discard(nullid)
|
|
|
if changegroup and not common and clheads == heads:
|
|
|
raise error.Abort(
|
|
|
_('server has pull-based clones disabled'),
|
|
|
hint=_('remove --pull if specified or upgrade Mercurial'))
|
|
|
|
|
|
info, chunks = exchange.getbundlechunks(repo, 'serve',
|
|
|
**pycompat.strkwargs(opts))
|
|
|
prefercompressed = info.get('prefercompressed', True)
|
|
|
except error.Abort as exc:
|
|
|
# cleanly forward Abort error to the client
|
|
|
if not exchange.bundle2requested(opts.get('bundlecaps')):
|
|
|
if proto.name == 'http-v1':
|
|
|
return ooberror(pycompat.bytestr(exc) + '\n')
|
|
|
raise # cannot do better for bundle1 + ssh
|
|
|
# bundle2 request expect a bundle2 reply
|
|
|
bundler = bundle2.bundle20(repo.ui)
|
|
|
manargs = [('message', pycompat.bytestr(exc))]
|
|
|
advargs = []
|
|
|
if exc.hint is not None:
|
|
|
advargs.append(('hint', exc.hint))
|
|
|
bundler.addpart(bundle2.bundlepart('error:abort',
|
|
|
manargs, advargs))
|
|
|
chunks = bundler.getchunks()
|
|
|
prefercompressed = False
|
|
|
|
|
|
return streamres(gen=chunks, prefer_uncompressed=not prefercompressed)
|
|
|
|
|
|
@wireprotocommand('heads')
|
|
|
def heads(repo, proto):
|
|
|
h = repo.heads()
|
|
|
return bytesresponse(encodelist(h) + '\n')
|
|
|
|
|
|
@wireprotocommand('hello')
|
|
|
def hello(repo, proto):
|
|
|
"""Called as part of SSH handshake to obtain server info.
|
|
|
|
|
|
Returns a list of lines describing interesting things about the
|
|
|
server, in an RFC822-like format.
|
|
|
|
|
|
Currently, the only one defined is ``capabilities``, which consists of a
|
|
|
line of space separated tokens describing server abilities:
|
|
|
|
|
|
capabilities: <token0> <token1> <token2>
|
|
|
"""
|
|
|
caps = capabilities(repo, proto).data
|
|
|
return bytesresponse('capabilities: %s\n' % caps)
|
|
|
|
|
|
@wireprotocommand('listkeys', 'namespace')
|
|
|
def listkeys(repo, proto, namespace):
|
|
|
d = repo.listkeys(encoding.tolocal(namespace)).items()
|
|
|
return bytesresponse(pushkeymod.encodekeys(d))
|
|
|
|
|
|
@wireprotocommand('lookup', 'key')
|
|
|
def lookup(repo, proto, key):
|
|
|
try:
|
|
|
k = encoding.tolocal(key)
|
|
|
c = repo[k]
|
|
|
r = c.hex()
|
|
|
success = 1
|
|
|
except Exception as inst:
|
|
|
r = util.forcebytestr(inst)
|
|
|
success = 0
|
|
|
return bytesresponse('%d %s\n' % (success, r))
|
|
|
|
|
|
@wireprotocommand('known', 'nodes *')
|
|
|
def known(repo, proto, nodes, others):
|
|
|
v = ''.join(b and '1' or '0' for b in repo.known(decodelist(nodes)))
|
|
|
return bytesresponse(v)
|
|
|
|
|
|
@wireprotocommand('pushkey', 'namespace key old new')
|
|
|
def pushkey(repo, proto, namespace, key, old, new):
|
|
|
# compatibility with pre-1.8 clients which were accidentally
|
|
|
# sending raw binary nodes rather than utf-8-encoded hex
|
|
|
if len(new) == 20 and util.escapestr(new) != new:
|
|
|
# looks like it could be a binary node
|
|
|
try:
|
|
|
new.decode('utf-8')
|
|
|
new = encoding.tolocal(new) # but cleanly decodes as UTF-8
|
|
|
except UnicodeDecodeError:
|
|
|
pass # binary, leave unmodified
|
|
|
else:
|
|
|
new = encoding.tolocal(new) # normal path
|
|
|
|
|
|
with proto.mayberedirectstdio() as output:
|
|
|
r = repo.pushkey(encoding.tolocal(namespace), encoding.tolocal(key),
|
|
|
encoding.tolocal(old), new) or False
|
|
|
|
|
|
output = output.getvalue() if output else ''
|
|
|
return bytesresponse('%d\n%s' % (int(r), output))
|
|
|
|
|
|
@wireprotocommand('stream_out')
|
|
|
def stream(repo, proto):
|
|
|
'''If the server supports streaming clone, it advertises the "stream"
|
|
|
capability with a value representing the version and flags of the repo
|
|
|
it is serving. Client checks to see if it understands the format.
|
|
|
'''
|
|
|
return streamres_legacy(streamclone.generatev1wireproto(repo))
|
|
|
|
|
|
@wireprotocommand('unbundle', 'heads')
|
|
|
def unbundle(repo, proto, heads):
|
|
|
their_heads = decodelist(heads)
|
|
|
|
|
|
with proto.mayberedirectstdio() as output:
|
|
|
try:
|
|
|
exchange.check_heads(repo, their_heads, 'preparing changes')
|
|
|
|
|
|
# write bundle data to temporary file because it can be big
|
|
|
fd, tempname = tempfile.mkstemp(prefix='hg-unbundle-')
|
|
|
fp = os.fdopen(fd, pycompat.sysstr('wb+'))
|
|
|
r = 0
|
|
|
try:
|
|
|
proto.forwardpayload(fp)
|
|
|
fp.seek(0)
|
|
|
gen = exchange.readbundle(repo.ui, fp, None)
|
|
|
if (isinstance(gen, changegroupmod.cg1unpacker)
|
|
|
and not bundle1allowed(repo, 'push')):
|
|
|
if proto.name == 'http-v1':
|
|
|
# need to special case http because stderr do not get to
|
|
|
# the http client on failed push so we need to abuse
|
|
|
# some other error type to make sure the message get to
|
|
|
# the user.
|
|
|
return ooberror(bundle2required)
|
|
|
raise error.Abort(bundle2requiredmain,
|
|
|
hint=bundle2requiredhint)
|
|
|
|
|
|
r = exchange.unbundle(repo, gen, their_heads, 'serve',
|
|
|
proto.client())
|
|
|
if util.safehasattr(r, 'addpart'):
|
|
|
# The return looks streamable, we are in the bundle2 case
|
|
|
# and should return a stream.
|
|
|
return streamres_legacy(gen=r.getchunks())
|
|
|
return pushres(r, output.getvalue() if output else '')
|
|
|
|
|
|
finally:
|
|
|
fp.close()
|
|
|
os.unlink(tempname)
|
|
|
|
|
|
except (error.BundleValueError, error.Abort, error.PushRaced) as exc:
|
|
|
# handle non-bundle2 case first
|
|
|
if not getattr(exc, 'duringunbundle2', False):
|
|
|
try:
|
|
|
raise
|
|
|
except error.Abort:
|
|
|
# The old code we moved used util.stderr directly.
|
|
|
# We did not change it to minimise code change.
|
|
|
# This need to be moved to something proper.
|
|
|
# Feel free to do it.
|
|
|
util.stderr.write("abort: %s\n" % exc)
|
|
|
if exc.hint is not None:
|
|
|
util.stderr.write("(%s)\n" % exc.hint)
|
|
|
return pushres(0, output.getvalue() if output else '')
|
|
|
except error.PushRaced:
|
|
|
return pusherr(str(exc),
|
|
|
output.getvalue() if output else '')
|
|
|
|
|
|
bundler = bundle2.bundle20(repo.ui)
|
|
|
for out in getattr(exc, '_bundle2salvagedoutput', ()):
|
|
|
bundler.addpart(out)
|
|
|
try:
|
|
|
try:
|
|
|
raise
|
|
|
except error.PushkeyFailed as exc:
|
|
|
# check client caps
|
|
|
remotecaps = getattr(exc, '_replycaps', None)
|
|
|
if (remotecaps is not None
|
|
|
and 'pushkey' not in remotecaps.get('error', ())):
|
|
|
# no support remote side, fallback to Abort handler.
|
|
|
raise
|
|
|
part = bundler.newpart('error:pushkey')
|
|
|
part.addparam('in-reply-to', exc.partid)
|
|
|
if exc.namespace is not None:
|
|
|
part.addparam('namespace', exc.namespace,
|
|
|
mandatory=False)
|
|
|
if exc.key is not None:
|
|
|
part.addparam('key', exc.key, mandatory=False)
|
|
|
if exc.new is not None:
|
|
|
part.addparam('new', exc.new, mandatory=False)
|
|
|
if exc.old is not None:
|
|
|
part.addparam('old', exc.old, mandatory=False)
|
|
|
if exc.ret is not None:
|
|
|
part.addparam('ret', exc.ret, mandatory=False)
|
|
|
except error.BundleValueError as exc:
|
|
|
errpart = bundler.newpart('error:unsupportedcontent')
|
|
|
if exc.parttype is not None:
|
|
|
errpart.addparam('parttype', exc.parttype)
|
|
|
if exc.params:
|
|
|
errpart.addparam('params', '\0'.join(exc.params))
|
|
|
except error.Abort as exc:
|
|
|
manargs = [('message', util.forcebytestr(exc))]
|
|
|
advargs = []
|
|
|
if exc.hint is not None:
|
|
|
advargs.append(('hint', exc.hint))
|
|
|
bundler.addpart(bundle2.bundlepart('error:abort',
|
|
|
manargs, advargs))
|
|
|
except error.PushRaced as exc:
|
|
|
bundler.newpart('error:pushraced',
|
|
|
[('message', util.forcebytestr(exc))])
|
|
|
return streamres_legacy(gen=bundler.getchunks())
|
|
|
|
