mercurial/wireprotoserver.py
author Gregory Szorc <gregory.szorc@gmail.com>
Mon, 21 Feb 2022 13:08:28 -0700
changeset 48946 642e31cb55f0
parent 48875 6000f5b25c9b
child 49284 d44e3c45f0e4
permissions -rw-r--r--
py3: use class X: instead of class X(object): The inheritance from object is implied in Python 3. So this should be equivalent. This change was generated via an automated search and replace. So there may have been some accidental changes. Differential Revision: https://phab.mercurial-scm.org/D12352
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# Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>
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# Copyright 2005-2007 Olivia Mackall <olivia@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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import contextlib
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import struct
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import threading
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from .i18n import _
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from . import (
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    encoding,
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    error,
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    pycompat,
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    util,
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    wireprototypes,
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    wireprotov1server,
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)
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from .interfaces import util as interfaceutil
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from .utils import (
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    compression,
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    stringutil,
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)
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stringio = util.stringio
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urlerr = util.urlerr
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urlreq = util.urlreq
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HTTP_OK = 200
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HGTYPE = b'application/mercurial-0.1'
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HGTYPE2 = b'application/mercurial-0.2'
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HGERRTYPE = b'application/hg-error'
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SSHV1 = wireprototypes.SSHV1
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def decodevaluefromheaders(req, headerprefix):
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    """Decode a long value from multiple HTTP request headers.
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    Returns the value as a bytes, not a str.
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    """
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    chunks = []
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    i = 1
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    while True:
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        v = req.headers.get(b'%s-%d' % (headerprefix, i))
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        if v is None:
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            break
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        chunks.append(pycompat.bytesurl(v))
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        i += 1
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    return b''.join(chunks)
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@interfaceutil.implementer(wireprototypes.baseprotocolhandler)
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class httpv1protocolhandler:
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    def __init__(self, req, ui, checkperm):
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        self._req = req
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        self._ui = ui
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        self._checkperm = checkperm
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        self._protocaps = None
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    @property
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    def name(self):
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        return b'http-v1'
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    def getargs(self, args):
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        knownargs = self._args()
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        data = {}
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        keys = args.split()
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        for k in keys:
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            if k == b'*':
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                star = {}
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                for key in knownargs.keys():
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                    if key != b'cmd' and key not in keys:
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                        star[key] = knownargs[key][0]
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                data[b'*'] = star
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            else:
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                data[k] = knownargs[k][0]
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        return [data[k] for k in keys]
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    def _args(self):
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        args = self._req.qsparams.asdictoflists()
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        postlen = int(self._req.headers.get(b'X-HgArgs-Post', 0))
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        if postlen:
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            args.update(
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                urlreq.parseqs(
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                    self._req.bodyfh.read(postlen), keep_blank_values=True
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                )
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            )
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            return args
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        argvalue = decodevaluefromheaders(self._req, b'X-HgArg')
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        args.update(urlreq.parseqs(argvalue, keep_blank_values=True))
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        return args
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    def getprotocaps(self):
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        if self._protocaps is None:
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            value = decodevaluefromheaders(self._req, b'X-HgProto')
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            self._protocaps = set(value.split(b' '))
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        return self._protocaps
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    def getpayload(self):
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        # Existing clients *always* send Content-Length.
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        length = int(self._req.headers[b'Content-Length'])
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        # If httppostargs is used, we need to read Content-Length
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        # minus the amount that was consumed by args.
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        length -= int(self._req.headers.get(b'X-HgArgs-Post', 0))
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        return util.filechunkiter(self._req.bodyfh, limit=length)
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    @contextlib.contextmanager
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    def mayberedirectstdio(self):
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        oldout = self._ui.fout
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        olderr = self._ui.ferr
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        out = util.stringio()
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        try:
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            self._ui.fout = out
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            self._ui.ferr = out
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            yield out
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        finally:
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            self._ui.fout = oldout
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            self._ui.ferr = olderr
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    def client(self):
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        return b'remote:%s:%s:%s' % (
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            self._req.urlscheme,
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            urlreq.quote(self._req.remotehost or b''),
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            urlreq.quote(self._req.remoteuser or b''),
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        )
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    def addcapabilities(self, repo, caps):
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        caps.append(b'batch')
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        caps.append(
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            b'httpheader=%d' % repo.ui.configint(b'server', b'maxhttpheaderlen')
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        )
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        if repo.ui.configbool(b'experimental', b'httppostargs'):
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            caps.append(b'httppostargs')
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        # FUTURE advertise 0.2rx once support is implemented
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        # FUTURE advertise minrx and mintx after consulting config option
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        caps.append(b'httpmediatype=0.1rx,0.1tx,0.2tx')
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        compengines = wireprototypes.supportedcompengines(
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            repo.ui, compression.SERVERROLE
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        )
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        if compengines:
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            comptypes = b','.join(
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                urlreq.quote(e.wireprotosupport().name) for e in compengines
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            )
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            caps.append(b'compression=%s' % comptypes)
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        return caps
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    def checkperm(self, perm):
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        return self._checkperm(perm)
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# This method exists mostly so that extensions like remotefilelog can
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# disable a kludgey legacy method only over http. As of early 2018,
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# there are no other known users, so with any luck we can discard this
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# hook if remotefilelog becomes a first-party extension.
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def iscmd(cmd):
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    return cmd in wireprotov1server.commands
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def handlewsgirequest(rctx, req, res, checkperm):
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    """Possibly process a wire protocol request.
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    If the current request is a wire protocol request, the request is
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    processed by this function.
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    ``req`` is a ``parsedrequest`` instance.
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    ``res`` is a ``wsgiresponse`` instance.
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    Returns a bool indicating if the request was serviced. If set, the caller
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    should stop processing the request, as a response has already been issued.
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    """
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    # Avoid cycle involving hg module.
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    from .hgweb import common as hgwebcommon
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    repo = rctx.repo
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    # HTTP version 1 wire protocol requests are denoted by a "cmd" query
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    # string parameter. If it isn't present, this isn't a wire protocol
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    # request.
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    if b'cmd' not in req.qsparams:
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        return False
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    cmd = req.qsparams[b'cmd']
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    # The "cmd" request parameter is used by both the wire protocol and hgweb.
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    # While not all wire protocol commands are available for all transports,
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    # if we see a "cmd" value that resembles a known wire protocol command, we
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    # route it to a protocol handler. This is better than routing possible
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    # wire protocol requests to hgweb because it prevents hgweb from using
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    # known wire protocol commands and it is less confusing for machine
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    # clients.
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    if not iscmd(cmd):
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        return False
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    # The "cmd" query string argument is only valid on the root path of the
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    # repo. e.g. ``/?cmd=foo``, ``/repo?cmd=foo``. URL paths within the repo
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    # like ``/blah?cmd=foo`` are not allowed. So don't recognize the request
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    # in this case. We send an HTTP 404 for backwards compatibility reasons.
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    if req.dispatchpath:
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        res.status = hgwebcommon.statusmessage(404)
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        res.headers[b'Content-Type'] = HGTYPE
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        # TODO This is not a good response to issue for this request. This
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        # is mostly for BC for now.
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        res.setbodybytes(b'0\n%s\n' % b'Not Found')
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        return True
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    proto = httpv1protocolhandler(
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        req, repo.ui, lambda perm: checkperm(rctx, req, perm)
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    )
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    # The permissions checker should be the only thing that can raise an
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    # ErrorResponse. It is kind of a layer violation to catch an hgweb
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    # exception here. So consider refactoring into a exception type that
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    # is associated with the wire protocol.
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    try:
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        _callhttp(repo, req, res, proto, cmd)
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    except hgwebcommon.ErrorResponse as e:
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        for k, v in e.headers:
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            res.headers[k] = v
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        res.status = hgwebcommon.statusmessage(
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            e.code, stringutil.forcebytestr(e)
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        )
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        # TODO This response body assumes the failed command was
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        # "unbundle." That assumption is not always valid.
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        res.setbodybytes(b'0\n%s\n' % stringutil.forcebytestr(e))
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    return True
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def _httpresponsetype(ui, proto, prefer_uncompressed):
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    """Determine the appropriate response type and compression settings.
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    Returns a tuple of (mediatype, compengine, engineopts).
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    """
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    # Determine the response media type and compression engine based
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    # on the request parameters.
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    if b'0.2' in proto.getprotocaps():
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        # All clients are expected to support uncompressed data.
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   253
        if prefer_uncompressed:
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            return HGTYPE2, compression._noopengine(), {}
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        # Now find an agreed upon compression format.
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        compformats = wireprotov1server.clientcompressionsupport(proto)
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        for engine in wireprototypes.supportedcompengines(
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            ui, compression.SERVERROLE
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        ):
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            if engine.wireprotosupport().name in compformats:
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   262
                opts = {}
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                level = ui.configint(b'server', b'%slevel' % engine.name())
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                if level is not None:
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                    opts[b'level'] = level
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                return HGTYPE2, engine, opts
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   268
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        # No mutually supported compression format. Fall back to the
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        # legacy protocol.
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    # Don't allow untrusted settings because disabling compression or
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    # setting a very high compression level could lead to flooding
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    # the server's network or CPU.
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    opts = {b'level': ui.configint(b'server', b'zliblevel')}
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    return HGTYPE, util.compengines[b'zlib'], opts
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def _callhttp(repo, req, res, proto, cmd):
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    # Avoid cycle involving hg module.
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    from .hgweb import common as hgwebcommon
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    def genversion2(gen, engine, engineopts):
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        # application/mercurial-0.2 always sends a payload header
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        # identifying the compression engine.
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        name = engine.wireprotosupport().name
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        assert 0 < len(name) < 256
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        yield struct.pack(b'B', len(name))
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        yield name
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        for chunk in gen:
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            yield chunk
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   293
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    def setresponse(code, contenttype, bodybytes=None, bodygen=None):
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        if code == HTTP_OK:
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            res.status = b'200 Script output follows'
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   297
        else:
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            res.status = hgwebcommon.statusmessage(code)
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   299
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        res.headers[b'Content-Type'] = contenttype
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   301
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        if bodybytes is not None:
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            res.setbodybytes(bodybytes)
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   304
        if bodygen is not None:
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   305
            res.setbodygen(bodygen)
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   306
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   307
    if not wireprotov1server.commands.commandavailable(cmd, proto):
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   308
        setresponse(
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   309
            HTTP_OK,
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            HGERRTYPE,
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   311
            _(
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                b'requested wire protocol command is not available over '
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                b'HTTP'
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   314
            ),
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   315
        )
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   316
        return
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   317
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   318
    proto.checkperm(wireprotov1server.commands[cmd].permission)
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   319
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   320
    rsp = wireprotov1server.dispatch(repo, proto, cmd)
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   321
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   322
    if isinstance(rsp, bytes):
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   323
        setresponse(HTTP_OK, HGTYPE, bodybytes=rsp)
36074
2f7290555c96 wireproto: introduce type for raw byte responses (API)
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   324
    elif isinstance(rsp, wireprototypes.bytesresponse):
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   325
        setresponse(HTTP_OK, HGTYPE, bodybytes=rsp.data)
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diff changeset
   326
    elif isinstance(rsp, wireprototypes.streamreslegacy):
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   327
        setresponse(HTTP_OK, HGTYPE, bodygen=rsp.gen)
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diff changeset
   328
    elif isinstance(rsp, wireprototypes.streamres):
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diff changeset
   329
        gen = rsp.gen
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   330
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   331
        # This code for compression should not be streamres specific. It
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diff changeset
   332
        # is here because we only compress streamres at the moment.
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diff changeset
   333
        mediatype, engine, engineopts = _httpresponsetype(
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diff changeset
   334
            repo.ui, proto, rsp.prefer_uncompressed
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   335
        )
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   336
        gen = engine.compressstream(gen, engineopts)
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   337
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   338
        if mediatype == HGTYPE2:
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   339
            gen = genversion2(gen, engine, engineopts)
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   340
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diff changeset
   341
        setresponse(HTTP_OK, mediatype, bodygen=gen)
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   342
    elif isinstance(rsp, wireprototypes.pushres):
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diff changeset
   343
        rsp = b'%d\n%s' % (rsp.res, rsp.output)
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diff changeset
   344
        setresponse(HTTP_OK, HGTYPE, bodybytes=rsp)
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   345
    elif isinstance(rsp, wireprototypes.pusherr):
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diff changeset
   346
        rsp = b'0\n%s\n' % rsp.res
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diff changeset
   347
        res.drain = True
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diff changeset
   348
        setresponse(HTTP_OK, HGTYPE, bodybytes=rsp)
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diff changeset
   349
    elif isinstance(rsp, wireprototypes.ooberror):
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diff changeset
   350
        setresponse(HTTP_OK, HGERRTYPE, bodybytes=rsp.message)
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   351
    else:
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   352
        raise error.ProgrammingError(b'hgweb.protocol internal failure', rsp)
35986
98a00aa0288d wireprotoserver: move error response handling out of hgweb
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   353
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   354
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diff changeset
   355
def _sshv1respondbytes(fout, value):
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diff changeset
   356
    """Send a bytes response for protocol version 1."""
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diff changeset
   357
    fout.write(b'%d\n' % len(value))
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diff changeset
   358
    fout.write(value)
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diff changeset
   359
    fout.flush()
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   360
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   361
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   362
def _sshv1respondstream(fout, source):
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diff changeset
   363
    write = fout.write
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diff changeset
   364
    for chunk in source.gen:
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diff changeset
   365
        write(chunk)
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   366
    fout.flush()
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diff changeset
   367
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   368
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diff changeset
   369
def _sshv1respondooberror(fout, ferr, rsp):
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diff changeset
   370
    ferr.write(b'%s\n-\n' % rsp)
5767664d39a5 wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35988
diff changeset
   371
    ferr.flush()
5767664d39a5 wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35988
diff changeset
   372
    fout.write(b'\n')
5767664d39a5 wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35988
diff changeset
   373
    fout.flush()
5767664d39a5 wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35988
diff changeset
   374
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   375
37810
856f381ad74b interfaceutil: module to stub out zope.interface
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37785
diff changeset
   376
@interfaceutil.implementer(wireprototypes.baseprotocolhandler)
48946
642e31cb55f0 py3: use class X: instead of class X(object):
Gregory Szorc <gregory.szorc@gmail.com>
parents: 48875
diff changeset
   377
class sshv1protocolhandler:
36065
bf676267f64f wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36064
diff changeset
   378
    """Handler for requests services via version 1 of SSH protocol."""
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   379
36065
bf676267f64f wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36064
diff changeset
   380
    def __init__(self, ui, fin, fout):
35870
f1efc0caeab7 wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35869
diff changeset
   381
        self._ui = ui
36065
bf676267f64f wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36064
diff changeset
   382
        self._fin = fin
bf676267f64f wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36064
diff changeset
   383
        self._fout = fout
37393
afcfdf53e4b5 wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents: 37296
diff changeset
   384
        self._protocaps = set()
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   385
35873
29759c46aa1a wireprotoserver: make name part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35872
diff changeset
   386
    @property
29759c46aa1a wireprotoserver: make name part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35872
diff changeset
   387
    def name(self):
36536
3cd245945ef3 wireprotoserver: move SSHV1 and SSHV2 constants to wireprototypes
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36526
diff changeset
   388
        return wireprototypes.SSHV1
35873
29759c46aa1a wireprotoserver: make name part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35872
diff changeset
   389
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   390
    def getargs(self, args):
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   391
        data = {}
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   392
        keys = args.split()
38783
e7aa113b14f7 global: use pycompat.xrange()
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37945
diff changeset
   393
        for n in pycompat.xrange(len(keys)):
35870
f1efc0caeab7 wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35869
diff changeset
   394
            argline = self._fin.readline()[:-1]
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   395
            arg, l = argline.split()
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   396
            if arg not in keys:
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   397
                raise error.Abort(_(b"unexpected parameter %r") % arg)
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   398
            if arg == b'*':
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   399
                star = {}
38783
e7aa113b14f7 global: use pycompat.xrange()
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37945
diff changeset
   400
                for k in pycompat.xrange(int(l)):
35870
f1efc0caeab7 wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35869
diff changeset
   401
                    argline = self._fin.readline()[:-1]
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   402
                    arg, l = argline.split()
35870
f1efc0caeab7 wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35869
diff changeset
   403
                    val = self._fin.read(int(l))
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   404
                    star[arg] = val
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   405
                data[b'*'] = star
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   406
            else:
35870
f1efc0caeab7 wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35869
diff changeset
   407
                val = self._fin.read(int(l))
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   408
                data[arg] = val
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   409
        return [data[k] for k in keys]
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   410
37393
afcfdf53e4b5 wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents: 37296
diff changeset
   411
    def getprotocaps(self):
afcfdf53e4b5 wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents: 37296
diff changeset
   412
        return self._protocaps
afcfdf53e4b5 wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents: 37296
diff changeset
   413
37414
2d965bfeb8f6 wireproto: allow direct stream processing for unbundle
Joerg Sonnenberger <joerg@bec.de>
parents: 37393
diff changeset
   414
    def getpayload(self):
36372
b8d0761a85c7 wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36371
diff changeset
   415
        # We initially send an empty response. This tells the client it is
b8d0761a85c7 wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36371
diff changeset
   416
        # OK to start sending data. If a client sees any other response, it
b8d0761a85c7 wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36371
diff changeset
   417
        # interprets it as an error.
b8d0761a85c7 wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36371
diff changeset
   418
        _sshv1respondbytes(self._fout, b'')
b8d0761a85c7 wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36371
diff changeset
   419
36070
90ca4986616c wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36069
diff changeset
   420
        # The file is in the form:
90ca4986616c wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36069
diff changeset
   421
        #
90ca4986616c wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36069
diff changeset
   422
        # <chunk size>\n<chunk>
90ca4986616c wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36069
diff changeset
   423
        # ...
90ca4986616c wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36069
diff changeset
   424
        # 0\n
35870
f1efc0caeab7 wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35869
diff changeset
   425
        count = int(self._fin.readline())
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   426
        while count:
37414
2d965bfeb8f6 wireproto: allow direct stream processing for unbundle
Joerg Sonnenberger <joerg@bec.de>
parents: 37393
diff changeset
   427
            yield self._fin.read(count)
35870
f1efc0caeab7 wireprotoserver: make some instance attributes private
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35869
diff changeset
   428
            count = int(self._fin.readline())
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   429
36066
2ad145fbde54 wireprotoserver: add context manager mechanism for redirecting stdio
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36065
diff changeset
   430
    @contextlib.contextmanager
2ad145fbde54 wireprotoserver: add context manager mechanism for redirecting stdio
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36065
diff changeset
   431
    def mayberedirectstdio(self):
2ad145fbde54 wireprotoserver: add context manager mechanism for redirecting stdio
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36065
diff changeset
   432
        yield None
2ad145fbde54 wireprotoserver: add context manager mechanism for redirecting stdio
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36065
diff changeset
   433
36069
957e773614d0 wireprotoserver: rename _client to client (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36068
diff changeset
   434
    def client(self):
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   435
        client = encoding.environ.get(b'SSH_CLIENT', b'').split(b' ', 1)[0]
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   436
        return b'remote:ssh:' + client
36065
bf676267f64f wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36064
diff changeset
   437
36613
6e585bca962e wireproto: add transport specific capabilities in the transport
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36610
diff changeset
   438
    def addcapabilities(self, repo, caps):
37393
afcfdf53e4b5 wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents: 37296
diff changeset
   439
        if self.name == wireprototypes.SSHV1:
afcfdf53e4b5 wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents: 37296
diff changeset
   440
            caps.append(b'protocaps')
37053
cd0ca979a8b8 wireproto: nominally don't expose "batch" to version 2 wire transports
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37052
diff changeset
   441
        caps.append(b'batch')
36613
6e585bca962e wireproto: add transport specific capabilities in the transport
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36610
diff changeset
   442
        return caps
6e585bca962e wireproto: add transport specific capabilities in the transport
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36610
diff changeset
   443
36801
66de4555cefd wireproto: formalize permissions checking as part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36800
diff changeset
   444
    def checkperm(self, perm):
66de4555cefd wireproto: formalize permissions checking as part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36800
diff changeset
   445
        pass
66de4555cefd wireproto: formalize permissions checking as part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36800
diff changeset
   446
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   447
36523
e7411fb7ba7f wireprotoserver: ability to run an SSH server until an event is set
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36372
diff changeset
   448
def _runsshserver(ui, repo, fin, fout, ev):
36215
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   449
    # This function operates like a state machine of sorts. The following
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   450
    # states are defined:
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   451
    #
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   452
    # protov1-serving
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   453
    #    Server is in protocol version 1 serving mode. Commands arrive on
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   454
    #    new lines. These commands are processed in this state, one command
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   455
    #    after the other.
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   456
    #
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   457
    # shutdown
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   458
    #    The server is shutting down, possibly in reaction to a client event.
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   459
    #
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   460
    # And here are their transitions:
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   461
    #
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   462
    # protov1-serving -> shutdown
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   463
    #    When server receives an empty request or encounters another
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   464
    #    error.
464bedc0fdb4 wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36214
diff changeset
   465
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   466
    state = b'protov1-serving'
36214
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   467
    proto = sshv1protocolhandler(ui, fin, fout)
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   468
36523
e7411fb7ba7f wireprotoserver: ability to run an SSH server until an event is set
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36372
diff changeset
   469
    while not ev.is_set():
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   470
        if state == b'protov1-serving':
36214
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   471
            # Commands are issued on new lines.
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   472
            request = fin.readline()[:-1]
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   473
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   474
            # Empty lines signal to terminate the connection.
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   475
            if not request:
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   476
                state = b'shutdown'
36214
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   477
                continue
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   478
37785
b4d85bc122bd wireproto: rename wireproto to wireprotov1server (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37783
diff changeset
   479
            available = wireprotov1server.commands.commandavailable(
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   480
                request, proto
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   481
            )
36214
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   482
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   483
            # This command isn't available. Send an empty response and go
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   484
            # back to waiting for a new command.
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   485
            if not available:
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   486
                _sshv1respondbytes(fout, b'')
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   487
                continue
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   488
37785
b4d85bc122bd wireproto: rename wireproto to wireprotov1server (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 37783
diff changeset
   489
            rsp = wireprotov1server.dispatch(repo, proto, request)
42896
7e19b640c53e sshserver: flush stream after command dispatch
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42814
diff changeset
   490
            repo.ui.fout.flush()
7e19b640c53e sshserver: flush stream after command dispatch
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 42814
diff changeset
   491
            repo.ui.ferr.flush()
36214
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   492
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   493
            if isinstance(rsp, bytes):
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   494
                _sshv1respondbytes(fout, rsp)
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   495
            elif isinstance(rsp, wireprototypes.bytesresponse):
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   496
                _sshv1respondbytes(fout, rsp.data)
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   497
            elif isinstance(rsp, wireprototypes.streamres):
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   498
                _sshv1respondstream(fout, rsp)
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   499
            elif isinstance(rsp, wireprototypes.streamreslegacy):
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   500
                _sshv1respondstream(fout, rsp)
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   501
            elif isinstance(rsp, wireprototypes.pushres):
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   502
                _sshv1respondbytes(fout, b'')
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   503
                _sshv1respondbytes(fout, b'%d' % rsp.res)
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   504
            elif isinstance(rsp, wireprototypes.pusherr):
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   505
                _sshv1respondbytes(fout, rsp.res)
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   506
            elif isinstance(rsp, wireprototypes.ooberror):
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   507
                _sshv1respondooberror(fout, ui.ferr, rsp.message)
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   508
            else:
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   509
                raise error.ProgrammingError(
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   510
                    b'unhandled response type from '
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   511
                    b'wire protocol command: %s' % rsp
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   512
                )
36214
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   513
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   514
        elif state == b'shutdown':
36214
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   515
            break
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   516
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   517
        else:
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   518
            raise error.ProgrammingError(
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   519
                b'unhandled ssh server state: %s' % state
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   520
            )
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   521
36214
3b3a987bbbaa wireprotoserver: move SSH server operation to a standalone function
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36213
diff changeset
   522
48946
642e31cb55f0 py3: use class X: instead of class X(object):
Gregory Szorc <gregory.szorc@gmail.com>
parents: 48875
diff changeset
   523
class sshserver:
36526
7cc4a9b9732a wireprotoserver: support logging SSH server I/O to a file descriptor
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36523
diff changeset
   524
    def __init__(self, ui, repo, logfh=None):
36065
bf676267f64f wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36064
diff changeset
   525
        self._ui = ui
bf676267f64f wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36064
diff changeset
   526
        self._repo = repo
41285
cf8677cd7286 ui: proxy protect/restorestdio() calls to update internal flag
Yuya Nishihara <yuya@tcha.org>
parents: 40074
diff changeset
   527
        self._fin, self._fout = ui.protectfinout()
36065
bf676267f64f wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36064
diff changeset
   528
36526
7cc4a9b9732a wireprotoserver: support logging SSH server I/O to a file descriptor
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36523
diff changeset
   529
        # Log write I/O to stdout and stderr if configured.
7cc4a9b9732a wireprotoserver: support logging SSH server I/O to a file descriptor
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36523
diff changeset
   530
        if logfh:
7cc4a9b9732a wireprotoserver: support logging SSH server I/O to a file descriptor
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36523
diff changeset
   531
            self._fout = util.makeloggingfileobject(
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   532
                logfh, self._fout, b'o', logdata=True
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   533
            )
36526
7cc4a9b9732a wireprotoserver: support logging SSH server I/O to a file descriptor
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36523
diff changeset
   534
            ui.ferr = util.makeloggingfileobject(
43077
687b865b95ad formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents: 43076
diff changeset
   535
                logfh, ui.ferr, b'e', logdata=True
43076
2372284d9457 formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents: 42896
diff changeset
   536
            )
36526
7cc4a9b9732a wireprotoserver: support logging SSH server I/O to a file descriptor
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36523
diff changeset
   537
35859
1bf5263fe5cc wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents: 35858
diff changeset
   538
    def serve_forever(self):
36523
e7411fb7ba7f wireprotoserver: ability to run an SSH server until an event is set
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36372
diff changeset
   539
        self.serveuntil(threading.Event())
41285
cf8677cd7286 ui: proxy protect/restorestdio() calls to update internal flag
Yuya Nishihara <yuya@tcha.org>
parents: 40074
diff changeset
   540
        self._ui.restorefinout(self._fin, self._fout)
36523
e7411fb7ba7f wireprotoserver: ability to run an SSH server until an event is set
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36372
diff changeset
   541
e7411fb7ba7f wireprotoserver: ability to run an SSH server until an event is set
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36372
diff changeset
   542
    def serveuntil(self, ev):
e7411fb7ba7f wireprotoserver: ability to run an SSH server until an event is set
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36372
diff changeset
   543
        """Serve until a threading.Event is set."""
e7411fb7ba7f wireprotoserver: ability to run an SSH server until an event is set
Gregory Szorc <gregory.szorc@gmail.com>
parents: 36372
diff changeset
   544
        _runsshserver(self._ui, self._repo, self._fin, self._fout, ev)