Mercurial > public > mercurial-scm > hg
annotate mercurial/wireprotoserver.py @ 36877:02bea04b4c54
hgweb: transition permissions hooks to modern request type (API)
We're trying to remove ``wsgirequest``. The permissions hooks don't
do anything they can't do with our new request type. So let's
pass that in.
This was the last use of ``wsgirequest`` in the wire protocol code!
.. api::
hgweb.hgweb_mod.permhooks no longer take a ``wsgirequest`` instance
as an argument.
Differential Revision: https://phab.mercurial-scm.org/D2793
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Sat, 10 Mar 2018 18:19:27 -0800 |
parents | a755fd3b7146 |
children | 1cfef5693203 |
rev | line source |
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1 # Copyright 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net> |
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2 # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> |
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3 # |
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4 # This software may be used and distributed according to the terms of the |
10263 | 5 # GNU General Public License version 2 or any later version. |
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6 |
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7 from __future__ import absolute_import |
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8 |
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9 import contextlib |
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10 import struct |
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11 import sys |
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12 import threading |
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13 |
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14 from .i18n import _ |
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15 from . import ( |
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16 encoding, |
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17 error, |
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18 hook, |
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19 pycompat, |
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20 util, |
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21 wireproto, |
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22 wireprototypes, |
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23 ) |
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24 |
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25 stringio = util.stringio |
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26 |
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27 urlerr = util.urlerr |
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28 urlreq = util.urlreq |
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29 |
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30 HTTP_OK = 200 |
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31 |
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32 HGTYPE = 'application/mercurial-0.1' |
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33 HGTYPE2 = 'application/mercurial-0.2' |
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34 HGERRTYPE = 'application/hg-error' |
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35 |
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36 SSHV1 = wireprototypes.SSHV1 |
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37 SSHV2 = wireprototypes.SSHV2 |
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38 |
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39 def decodevaluefromheaders(req, headerprefix): |
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40 """Decode a long value from multiple HTTP request headers. |
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41 |
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42 Returns the value as a bytes, not a str. |
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43 """ |
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44 chunks = [] |
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45 i = 1 |
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46 while True: |
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47 v = req.headers.get(b'%s-%d' % (headerprefix, i)) |
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48 if v is None: |
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49 break |
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50 chunks.append(pycompat.bytesurl(v)) |
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51 i += 1 |
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52 |
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53 return ''.join(chunks) |
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54 |
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55 class httpv1protocolhandler(wireprototypes.baseprotocolhandler): |
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56 def __init__(self, req, ui, checkperm): |
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57 self._req = req |
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58 self._ui = ui |
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59 self._checkperm = checkperm |
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60 |
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61 @property |
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62 def name(self): |
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63 return 'http-v1' |
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64 |
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65 def getargs(self, args): |
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66 knownargs = self._args() |
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67 data = {} |
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68 keys = args.split() |
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69 for k in keys: |
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70 if k == '*': |
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71 star = {} |
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72 for key in knownargs.keys(): |
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73 if key != 'cmd' and key not in keys: |
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74 star[key] = knownargs[key][0] |
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75 data['*'] = star |
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76 else: |
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77 data[k] = knownargs[k][0] |
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78 return [data[k] for k in keys] |
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79 |
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80 def _args(self): |
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81 args = self._req.qsparams.asdictoflists() |
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82 postlen = int(self._req.headers.get(b'X-HgArgs-Post', 0)) |
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83 if postlen: |
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84 args.update(urlreq.parseqs( |
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85 self._req.bodyfh.read(postlen), keep_blank_values=True)) |
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86 return args |
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87 |
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88 argvalue = decodevaluefromheaders(self._req, b'X-HgArg') |
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89 args.update(urlreq.parseqs(argvalue, keep_blank_values=True)) |
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90 return args |
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91 |
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92 def forwardpayload(self, fp): |
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93 # Existing clients *always* send Content-Length. |
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94 length = int(self._req.headers[b'Content-Length']) |
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95 |
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96 # If httppostargs is used, we need to read Content-Length |
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97 # minus the amount that was consumed by args. |
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98 length -= int(self._req.headers.get(b'X-HgArgs-Post', 0)) |
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99 for s in util.filechunkiter(self._req.bodyfh, limit=length): |
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100 fp.write(s) |
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101 |
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102 @contextlib.contextmanager |
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103 def mayberedirectstdio(self): |
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104 oldout = self._ui.fout |
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105 olderr = self._ui.ferr |
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106 |
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107 out = util.stringio() |
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108 |
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109 try: |
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110 self._ui.fout = out |
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111 self._ui.ferr = out |
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112 yield out |
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113 finally: |
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114 self._ui.fout = oldout |
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115 self._ui.ferr = olderr |
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116 |
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117 def client(self): |
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118 return 'remote:%s:%s:%s' % ( |
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119 self._req.urlscheme, |
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120 urlreq.quote(self._req.remotehost or ''), |
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121 urlreq.quote(self._req.remoteuser or '')) |
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122 |
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123 def addcapabilities(self, repo, caps): |
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124 caps.append('httpheader=%d' % |
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125 repo.ui.configint('server', 'maxhttpheaderlen')) |
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126 if repo.ui.configbool('experimental', 'httppostargs'): |
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127 caps.append('httppostargs') |
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128 |
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129 # FUTURE advertise 0.2rx once support is implemented |
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130 # FUTURE advertise minrx and mintx after consulting config option |
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131 caps.append('httpmediatype=0.1rx,0.1tx,0.2tx') |
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132 |
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133 compengines = wireproto.supportedcompengines(repo.ui, util.SERVERROLE) |
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134 if compengines: |
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135 comptypes = ','.join(urlreq.quote(e.wireprotosupport().name) |
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136 for e in compengines) |
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137 caps.append('compression=%s' % comptypes) |
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138 |
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139 return caps |
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140 |
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141 def checkperm(self, perm): |
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142 return self._checkperm(perm) |
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143 |
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144 # This method exists mostly so that extensions like remotefilelog can |
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145 # disable a kludgey legacy method only over http. As of early 2018, |
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146 # there are no other known users, so with any luck we can discard this |
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147 # hook if remotefilelog becomes a first-party extension. |
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148 def iscmd(cmd): |
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149 return cmd in wireproto.commands |
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150 |
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151 def handlewsgirequest(rctx, req, res, checkperm): |
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152 """Possibly process a wire protocol request. |
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153 |
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154 If the current request is a wire protocol request, the request is |
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155 processed by this function. |
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156 |
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157 ``req`` is a ``parsedrequest`` instance. |
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158 ``res`` is a ``wsgiresponse`` instance. |
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159 |
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160 Returns a bool indicating if the request was serviced. If set, the caller |
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161 should stop processing the request, as a response has already been issued. |
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162 """ |
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163 # Avoid cycle involving hg module. |
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164 from .hgweb import common as hgwebcommon |
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165 |
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166 repo = rctx.repo |
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167 |
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168 # HTTP version 1 wire protocol requests are denoted by a "cmd" query |
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169 # string parameter. If it isn't present, this isn't a wire protocol |
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170 # request. |
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171 if 'cmd' not in req.qsparams: |
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172 return False |
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173 |
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174 cmd = req.qsparams['cmd'] |
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175 |
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176 # The "cmd" request parameter is used by both the wire protocol and hgweb. |
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177 # While not all wire protocol commands are available for all transports, |
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178 # if we see a "cmd" value that resembles a known wire protocol command, we |
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179 # route it to a protocol handler. This is better than routing possible |
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180 # wire protocol requests to hgweb because it prevents hgweb from using |
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181 # known wire protocol commands and it is less confusing for machine |
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182 # clients. |
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183 if not iscmd(cmd): |
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184 return False |
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185 |
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186 # The "cmd" query string argument is only valid on the root path of the |
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187 # repo. e.g. ``/?cmd=foo``, ``/repo?cmd=foo``. URL paths within the repo |
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188 # like ``/blah?cmd=foo`` are not allowed. So don't recognize the request |
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189 # in this case. We send an HTTP 404 for backwards compatibility reasons. |
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190 if req.dispatchpath: |
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191 res.status = hgwebcommon.statusmessage(404) |
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192 res.headers['Content-Type'] = HGTYPE |
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193 # TODO This is not a good response to issue for this request. This |
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194 # is mostly for BC for now. |
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195 res.setbodybytes('0\n%s\n' % b'Not Found') |
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196 return True |
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197 |
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198 proto = httpv1protocolhandler(req, repo.ui, |
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199 lambda perm: checkperm(rctx, req, perm)) |
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200 |
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201 # The permissions checker should be the only thing that can raise an |
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202 # ErrorResponse. It is kind of a layer violation to catch an hgweb |
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203 # exception here. So consider refactoring into a exception type that |
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204 # is associated with the wire protocol. |
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205 try: |
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206 _callhttp(repo, req, res, proto, cmd) |
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207 except hgwebcommon.ErrorResponse as e: |
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208 for k, v in e.headers: |
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209 res.headers[k] = v |
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210 res.status = hgwebcommon.statusmessage(e.code, pycompat.bytestr(e)) |
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211 # TODO This response body assumes the failed command was |
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212 # "unbundle." That assumption is not always valid. |
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213 res.setbodybytes('0\n%s\n' % pycompat.bytestr(e)) |
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214 |
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215 return True |
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216 |
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217 def _httpresponsetype(ui, req, prefer_uncompressed): |
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218 """Determine the appropriate response type and compression settings. |
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219 |
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220 Returns a tuple of (mediatype, compengine, engineopts). |
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221 """ |
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222 # Determine the response media type and compression engine based |
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223 # on the request parameters. |
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224 protocaps = decodevaluefromheaders(req, 'X-HgProto').split(' ') |
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225 |
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226 if '0.2' in protocaps: |
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227 # All clients are expected to support uncompressed data. |
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228 if prefer_uncompressed: |
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229 return HGTYPE2, util._noopengine(), {} |
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230 |
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231 # Default as defined by wire protocol spec. |
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232 compformats = ['zlib', 'none'] |
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233 for cap in protocaps: |
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234 if cap.startswith('comp='): |
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235 compformats = cap[5:].split(',') |
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236 break |
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237 |
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238 # Now find an agreed upon compression format. |
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239 for engine in wireproto.supportedcompengines(ui, util.SERVERROLE): |
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240 if engine.wireprotosupport().name in compformats: |
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241 opts = {} |
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242 level = ui.configint('server', '%slevel' % engine.name()) |
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243 if level is not None: |
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244 opts['level'] = level |
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245 |
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246 return HGTYPE2, engine, opts |
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247 |
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248 # No mutually supported compression format. Fall back to the |
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249 # legacy protocol. |
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250 |
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251 # Don't allow untrusted settings because disabling compression or |
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252 # setting a very high compression level could lead to flooding |
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253 # the server's network or CPU. |
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254 opts = {'level': ui.configint('server', 'zliblevel')} |
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255 return HGTYPE, util.compengines['zlib'], opts |
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256 |
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257 def _callhttp(repo, req, res, proto, cmd): |
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258 # Avoid cycle involving hg module. |
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259 from .hgweb import common as hgwebcommon |
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260 |
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261 def genversion2(gen, engine, engineopts): |
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262 # application/mercurial-0.2 always sends a payload header |
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263 # identifying the compression engine. |
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264 name = engine.wireprotosupport().name |
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265 assert 0 < len(name) < 256 |
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266 yield struct.pack('B', len(name)) |
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267 yield name |
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268 |
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269 for chunk in gen: |
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270 yield chunk |
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271 |
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272 def setresponse(code, contenttype, bodybytes=None, bodygen=None): |
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273 if code == HTTP_OK: |
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274 res.status = '200 Script output follows' |
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275 else: |
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276 res.status = hgwebcommon.statusmessage(code) |
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277 |
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278 res.headers['Content-Type'] = contenttype |
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279 |
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280 if bodybytes is not None: |
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281 res.setbodybytes(bodybytes) |
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282 if bodygen is not None: |
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283 res.setbodygen(bodygen) |
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284 |
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285 if not wireproto.commands.commandavailable(cmd, proto): |
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286 setresponse(HTTP_OK, HGERRTYPE, |
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287 _('requested wire protocol command is not available over ' |
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288 'HTTP')) |
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289 return |
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290 |
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291 proto.checkperm(wireproto.commands[cmd].permission) |
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292 |
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293 rsp = wireproto.dispatch(repo, proto, cmd) |
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294 |
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295 if isinstance(rsp, bytes): |
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296 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp) |
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297 elif isinstance(rsp, wireprototypes.bytesresponse): |
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298 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp.data) |
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299 elif isinstance(rsp, wireprototypes.streamreslegacy): |
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300 setresponse(HTTP_OK, HGTYPE, bodygen=rsp.gen) |
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301 elif isinstance(rsp, wireprototypes.streamres): |
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302 gen = rsp.gen |
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303 |
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304 # This code for compression should not be streamres specific. It |
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305 # is here because we only compress streamres at the moment. |
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306 mediatype, engine, engineopts = _httpresponsetype( |
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307 repo.ui, req, rsp.prefer_uncompressed) |
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308 gen = engine.compressstream(gen, engineopts) |
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309 |
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310 if mediatype == HGTYPE2: |
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311 gen = genversion2(gen, engine, engineopts) |
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312 |
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313 setresponse(HTTP_OK, mediatype, bodygen=gen) |
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314 elif isinstance(rsp, wireprototypes.pushres): |
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315 rsp = '%d\n%s' % (rsp.res, rsp.output) |
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316 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp) |
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317 elif isinstance(rsp, wireprototypes.pusherr): |
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318 rsp = '0\n%s\n' % rsp.res |
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319 res.drain = True |
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320 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp) |
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321 elif isinstance(rsp, wireprototypes.ooberror): |
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322 setresponse(HTTP_OK, HGERRTYPE, bodybytes=rsp.message) |
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323 else: |
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324 raise error.ProgrammingError('hgweb.protocol internal failure', rsp) |
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325 |
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326 def _sshv1respondbytes(fout, value): |
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327 """Send a bytes response for protocol version 1.""" |
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328 fout.write('%d\n' % len(value)) |
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329 fout.write(value) |
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330 fout.flush() |
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331 |
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332 def _sshv1respondstream(fout, source): |
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333 write = fout.write |
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334 for chunk in source.gen: |
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335 write(chunk) |
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336 fout.flush() |
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337 |
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338 def _sshv1respondooberror(fout, ferr, rsp): |
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339 ferr.write(b'%s\n-\n' % rsp) |
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340 ferr.flush() |
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341 fout.write(b'\n') |
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342 fout.flush() |
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343 |
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344 class sshv1protocolhandler(wireprototypes.baseprotocolhandler): |
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345 """Handler for requests services via version 1 of SSH protocol.""" |
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346 def __init__(self, ui, fin, fout): |
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347 self._ui = ui |
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348 self._fin = fin |
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349 self._fout = fout |
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350 |
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351 @property |
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352 def name(self): |
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353 return wireprototypes.SSHV1 |
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354 |
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355 def getargs(self, args): |
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356 data = {} |
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357 keys = args.split() |
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358 for n in xrange(len(keys)): |
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359 argline = self._fin.readline()[:-1] |
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360 arg, l = argline.split() |
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361 if arg not in keys: |
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362 raise error.Abort(_("unexpected parameter %r") % arg) |
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363 if arg == '*': |
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364 star = {} |
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365 for k in xrange(int(l)): |
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366 argline = self._fin.readline()[:-1] |
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367 arg, l = argline.split() |
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368 val = self._fin.read(int(l)) |
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369 star[arg] = val |
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370 data['*'] = star |
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371 else: |
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372 val = self._fin.read(int(l)) |
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373 data[arg] = val |
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374 return [data[k] for k in keys] |
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375 |
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376 def forwardpayload(self, fpout): |
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377 # We initially send an empty response. This tells the client it is |
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378 # OK to start sending data. If a client sees any other response, it |
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379 # interprets it as an error. |
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380 _sshv1respondbytes(self._fout, b'') |
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381 |
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382 # The file is in the form: |
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383 # |
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384 # <chunk size>\n<chunk> |
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385 # ... |
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386 # 0\n |
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387 count = int(self._fin.readline()) |
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388 while count: |
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389 fpout.write(self._fin.read(count)) |
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390 count = int(self._fin.readline()) |
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391 |
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392 @contextlib.contextmanager |
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393 def mayberedirectstdio(self): |
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394 yield None |
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395 |
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396 def client(self): |
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397 client = encoding.environ.get('SSH_CLIENT', '').split(' ', 1)[0] |
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398 return 'remote:ssh:' + client |
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399 |
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400 def addcapabilities(self, repo, caps): |
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401 return caps |
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402 |
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403 def checkperm(self, perm): |
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404 pass |
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405 |
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406 class sshv2protocolhandler(sshv1protocolhandler): |
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407 """Protocol handler for version 2 of the SSH protocol.""" |
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408 |
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409 @property |
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410 def name(self): |
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411 return wireprototypes.SSHV2 |
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412 |
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413 def _runsshserver(ui, repo, fin, fout, ev): |
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414 # This function operates like a state machine of sorts. The following |
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415 # states are defined: |
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416 # |
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417 # protov1-serving |
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418 # Server is in protocol version 1 serving mode. Commands arrive on |
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419 # new lines. These commands are processed in this state, one command |
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420 # after the other. |
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421 # |
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422 # protov2-serving |
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423 # Server is in protocol version 2 serving mode. |
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424 # |
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425 # upgrade-initial |
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426 # The server is going to process an upgrade request. |
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427 # |
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428 # upgrade-v2-filter-legacy-handshake |
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429 # The protocol is being upgraded to version 2. The server is expecting |
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430 # the legacy handshake from version 1. |
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431 # |
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432 # upgrade-v2-finish |
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433 # The upgrade to version 2 of the protocol is imminent. |
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434 # |
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435 # shutdown |
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436 # The server is shutting down, possibly in reaction to a client event. |
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437 # |
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438 # And here are their transitions: |
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439 # |
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440 # protov1-serving -> shutdown |
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441 # When server receives an empty request or encounters another |
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442 # error. |
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443 # |
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444 # protov1-serving -> upgrade-initial |
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445 # An upgrade request line was seen. |
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446 # |
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447 # upgrade-initial -> upgrade-v2-filter-legacy-handshake |
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448 # Upgrade to version 2 in progress. Server is expecting to |
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449 # process a legacy handshake. |
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450 # |
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451 # upgrade-v2-filter-legacy-handshake -> shutdown |
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452 # Client did not fulfill upgrade handshake requirements. |
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453 # |
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454 # upgrade-v2-filter-legacy-handshake -> upgrade-v2-finish |
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455 # Client fulfilled version 2 upgrade requirements. Finishing that |
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456 # upgrade. |
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457 # |
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458 # upgrade-v2-finish -> protov2-serving |
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459 # Protocol upgrade to version 2 complete. Server can now speak protocol |
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460 # version 2. |
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461 # |
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462 # protov2-serving -> protov1-serving |
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463 # Ths happens by default since protocol version 2 is the same as |
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464 # version 1 except for the handshake. |
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465 |
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466 state = 'protov1-serving' |
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467 proto = sshv1protocolhandler(ui, fin, fout) |
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468 protoswitched = False |
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469 |
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470 while not ev.is_set(): |
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471 if state == 'protov1-serving': |
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472 # Commands are issued on new lines. |
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473 request = fin.readline()[:-1] |
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474 |
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475 # Empty lines signal to terminate the connection. |
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476 if not request: |
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477 state = 'shutdown' |
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478 continue |
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479 |
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480 # It looks like a protocol upgrade request. Transition state to |
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481 # handle it. |
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482 if request.startswith(b'upgrade '): |
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483 if protoswitched: |
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484 _sshv1respondooberror(fout, ui.ferr, |
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485 b'cannot upgrade protocols multiple ' |
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486 b'times') |
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487 state = 'shutdown' |
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488 continue |
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489 |
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490 state = 'upgrade-initial' |
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491 continue |
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492 |
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493 available = wireproto.commands.commandavailable(request, proto) |
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494 |
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495 # This command isn't available. Send an empty response and go |
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496 # back to waiting for a new command. |
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497 if not available: |
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498 _sshv1respondbytes(fout, b'') |
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499 continue |
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500 |
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501 rsp = wireproto.dispatch(repo, proto, request) |
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502 |
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503 if isinstance(rsp, bytes): |
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504 _sshv1respondbytes(fout, rsp) |
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505 elif isinstance(rsp, wireprototypes.bytesresponse): |
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506 _sshv1respondbytes(fout, rsp.data) |
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507 elif isinstance(rsp, wireprototypes.streamres): |
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508 _sshv1respondstream(fout, rsp) |
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509 elif isinstance(rsp, wireprototypes.streamreslegacy): |
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510 _sshv1respondstream(fout, rsp) |
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511 elif isinstance(rsp, wireprototypes.pushres): |
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512 _sshv1respondbytes(fout, b'') |
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513 _sshv1respondbytes(fout, b'%d' % rsp.res) |
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514 elif isinstance(rsp, wireprototypes.pusherr): |
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515 _sshv1respondbytes(fout, rsp.res) |
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516 elif isinstance(rsp, wireprototypes.ooberror): |
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517 _sshv1respondooberror(fout, ui.ferr, rsp.message) |
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518 else: |
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519 raise error.ProgrammingError('unhandled response type from ' |
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520 'wire protocol command: %s' % rsp) |
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521 |
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522 # For now, protocol version 2 serving just goes back to version 1. |
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523 elif state == 'protov2-serving': |
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524 state = 'protov1-serving' |
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525 continue |
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526 |
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527 elif state == 'upgrade-initial': |
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528 # We should never transition into this state if we've switched |
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529 # protocols. |
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530 assert not protoswitched |
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|
531 assert proto.name == wireprototypes.SSHV1 |
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532 |
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533 # Expected: upgrade <token> <capabilities> |
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534 # If we get something else, the request is malformed. It could be |
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535 # from a future client that has altered the upgrade line content. |
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536 # We treat this as an unknown command. |
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537 try: |
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538 token, caps = request.split(b' ')[1:] |
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539 except ValueError: |
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540 _sshv1respondbytes(fout, b'') |
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541 state = 'protov1-serving' |
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542 continue |
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|
543 |
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544 # Send empty response if we don't support upgrading protocols. |
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545 if not ui.configbool('experimental', 'sshserver.support-v2'): |
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546 _sshv1respondbytes(fout, b'') |
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547 state = 'protov1-serving' |
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548 continue |
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549 |
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550 try: |
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|
551 caps = urlreq.parseqs(caps) |
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552 except ValueError: |
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553 _sshv1respondbytes(fout, b'') |
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554 state = 'protov1-serving' |
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555 continue |
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556 |
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|
557 # We don't see an upgrade request to protocol version 2. Ignore |
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558 # the upgrade request. |
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559 wantedprotos = caps.get(b'proto', [b''])[0] |
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560 if SSHV2 not in wantedprotos: |
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561 _sshv1respondbytes(fout, b'') |
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562 state = 'protov1-serving' |
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563 continue |
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|
564 |
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|
565 # It looks like we can honor this upgrade request to protocol 2. |
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566 # Filter the rest of the handshake protocol request lines. |
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567 state = 'upgrade-v2-filter-legacy-handshake' |
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568 continue |
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569 |
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570 elif state == 'upgrade-v2-filter-legacy-handshake': |
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571 # Client should have sent legacy handshake after an ``upgrade`` |
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572 # request. Expected lines: |
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573 # |
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574 # hello |
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575 # between |
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576 # pairs 81 |
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577 # 0000...-0000... |
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578 |
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579 ok = True |
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580 for line in (b'hello', b'between', b'pairs 81'): |
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581 request = fin.readline()[:-1] |
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582 |
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583 if request != line: |
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584 _sshv1respondooberror(fout, ui.ferr, |
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585 b'malformed handshake protocol: ' |
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586 b'missing %s' % line) |
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587 ok = False |
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588 state = 'shutdown' |
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589 break |
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590 |
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591 if not ok: |
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592 continue |
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593 |
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594 request = fin.read(81) |
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595 if request != b'%s-%s' % (b'0' * 40, b'0' * 40): |
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596 _sshv1respondooberror(fout, ui.ferr, |
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597 b'malformed handshake protocol: ' |
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598 b'missing between argument value') |
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599 state = 'shutdown' |
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600 continue |
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601 |
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602 state = 'upgrade-v2-finish' |
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603 continue |
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604 |
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605 elif state == 'upgrade-v2-finish': |
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606 # Send the upgrade response. |
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607 fout.write(b'upgraded %s %s\n' % (token, SSHV2)) |
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608 servercaps = wireproto.capabilities(repo, proto) |
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609 rsp = b'capabilities: %s' % servercaps.data |
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610 fout.write(b'%d\n%s\n' % (len(rsp), rsp)) |
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611 fout.flush() |
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612 |
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613 proto = sshv2protocolhandler(ui, fin, fout) |
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614 protoswitched = True |
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615 |
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616 state = 'protov2-serving' |
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617 continue |
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618 |
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619 elif state == 'shutdown': |
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620 break |
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621 |
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622 else: |
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623 raise error.ProgrammingError('unhandled ssh server state: %s' % |
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624 state) |
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625 |
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626 class sshserver(object): |
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627 def __init__(self, ui, repo, logfh=None): |
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628 self._ui = ui |
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629 self._repo = repo |
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630 self._fin = ui.fin |
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631 self._fout = ui.fout |
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632 |
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633 # Log write I/O to stdout and stderr if configured. |
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634 if logfh: |
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635 self._fout = util.makeloggingfileobject( |
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636 logfh, self._fout, 'o', logdata=True) |
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637 ui.ferr = util.makeloggingfileobject( |
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638 logfh, ui.ferr, 'e', logdata=True) |
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639 |
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640 hook.redirect(True) |
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641 ui.fout = repo.ui.fout = ui.ferr |
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642 |
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643 # Prevent insertion/deletion of CRs |
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644 util.setbinary(self._fin) |
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645 util.setbinary(self._fout) |
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646 |
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647 def serve_forever(self): |
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648 self.serveuntil(threading.Event()) |
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649 sys.exit(0) |
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650 |
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651 def serveuntil(self, ev): |
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652 """Serve until a threading.Event is set.""" |
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653 _runsshserver(self._ui, self._repo, self._fin, self._fout, ev) |