Mercurial > hg
annotate mercurial/wireprotoserver.py @ 41541:595a67a301ee
check-config: use raw strings for regular expressions
This avoids SyntaxWarning on Python 3.8 for invalid \ escapes.
Differential Revision: https://phab.mercurial-scm.org/D5826
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Mon, 04 Feb 2019 09:34:11 -0800 |
parents | cf8677cd7286 |
children | 3e47d1ec9da5 |
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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 pycompat, |
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19 util, |
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20 wireprototypes, |
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21 wireprotov1server, |
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22 wireprotov2server, |
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23 ) |
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24 from .utils import ( |
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25 cborutil, |
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26 interfaceutil, |
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27 ) |
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28 |
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29 stringio = util.stringio |
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30 |
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31 urlerr = util.urlerr |
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32 urlreq = util.urlreq |
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33 |
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34 HTTP_OK = 200 |
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35 |
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36 HGTYPE = 'application/mercurial-0.1' |
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37 HGTYPE2 = 'application/mercurial-0.2' |
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38 HGERRTYPE = 'application/hg-error' |
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39 |
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40 SSHV1 = wireprototypes.SSHV1 |
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41 SSHV2 = wireprototypes.SSHV2 |
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42 |
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43 def decodevaluefromheaders(req, headerprefix): |
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44 """Decode a long value from multiple HTTP request headers. |
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45 |
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46 Returns the value as a bytes, not a str. |
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47 """ |
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48 chunks = [] |
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49 i = 1 |
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50 while True: |
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51 v = req.headers.get(b'%s-%d' % (headerprefix, i)) |
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52 if v is None: |
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53 break |
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54 chunks.append(pycompat.bytesurl(v)) |
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55 i += 1 |
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56 |
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57 return ''.join(chunks) |
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58 |
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59 @interfaceutil.implementer(wireprototypes.baseprotocolhandler) |
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60 class httpv1protocolhandler(object): |
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61 def __init__(self, req, ui, checkperm): |
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62 self._req = req |
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63 self._ui = ui |
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64 self._checkperm = checkperm |
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65 self._protocaps = None |
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66 |
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67 @property |
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68 def name(self): |
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69 return 'http-v1' |
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70 |
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71 def getargs(self, args): |
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72 knownargs = self._args() |
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73 data = {} |
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74 keys = args.split() |
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75 for k in keys: |
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76 if k == '*': |
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77 star = {} |
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78 for key in knownargs.keys(): |
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79 if key != 'cmd' and key not in keys: |
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80 star[key] = knownargs[key][0] |
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81 data['*'] = star |
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82 else: |
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83 data[k] = knownargs[k][0] |
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84 return [data[k] for k in keys] |
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85 |
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86 def _args(self): |
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87 args = self._req.qsparams.asdictoflists() |
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88 postlen = int(self._req.headers.get(b'X-HgArgs-Post', 0)) |
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89 if postlen: |
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90 args.update(urlreq.parseqs( |
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91 self._req.bodyfh.read(postlen), keep_blank_values=True)) |
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92 return args |
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93 |
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94 argvalue = decodevaluefromheaders(self._req, b'X-HgArg') |
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95 args.update(urlreq.parseqs(argvalue, keep_blank_values=True)) |
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96 return args |
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97 |
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98 def getprotocaps(self): |
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99 if self._protocaps is None: |
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100 value = decodevaluefromheaders(self._req, b'X-HgProto') |
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101 self._protocaps = set(value.split(' ')) |
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102 return self._protocaps |
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103 |
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104 def getpayload(self): |
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105 # Existing clients *always* send Content-Length. |
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106 length = int(self._req.headers[b'Content-Length']) |
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107 |
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108 # If httppostargs is used, we need to read Content-Length |
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109 # minus the amount that was consumed by args. |
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110 length -= int(self._req.headers.get(b'X-HgArgs-Post', 0)) |
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111 return util.filechunkiter(self._req.bodyfh, limit=length) |
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112 |
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113 @contextlib.contextmanager |
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114 def mayberedirectstdio(self): |
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115 oldout = self._ui.fout |
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116 olderr = self._ui.ferr |
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117 |
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118 out = util.stringio() |
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119 |
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120 try: |
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121 self._ui.fout = out |
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122 self._ui.ferr = out |
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123 yield out |
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124 finally: |
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125 self._ui.fout = oldout |
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126 self._ui.ferr = olderr |
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127 |
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128 def client(self): |
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129 return 'remote:%s:%s:%s' % ( |
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130 self._req.urlscheme, |
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131 urlreq.quote(self._req.remotehost or ''), |
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132 urlreq.quote(self._req.remoteuser or '')) |
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133 |
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134 def addcapabilities(self, repo, caps): |
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135 caps.append(b'batch') |
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136 |
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137 caps.append('httpheader=%d' % |
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138 repo.ui.configint('server', 'maxhttpheaderlen')) |
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139 if repo.ui.configbool('experimental', 'httppostargs'): |
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140 caps.append('httppostargs') |
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141 |
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142 # FUTURE advertise 0.2rx once support is implemented |
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143 # FUTURE advertise minrx and mintx after consulting config option |
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144 caps.append('httpmediatype=0.1rx,0.1tx,0.2tx') |
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145 |
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146 compengines = wireprototypes.supportedcompengines(repo.ui, |
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147 util.SERVERROLE) |
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148 if compengines: |
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149 comptypes = ','.join(urlreq.quote(e.wireprotosupport().name) |
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150 for e in compengines) |
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151 caps.append('compression=%s' % comptypes) |
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152 |
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153 return caps |
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154 |
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155 def checkperm(self, perm): |
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156 return self._checkperm(perm) |
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157 |
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158 # This method exists mostly so that extensions like remotefilelog can |
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159 # disable a kludgey legacy method only over http. As of early 2018, |
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160 # there are no other known users, so with any luck we can discard this |
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161 # hook if remotefilelog becomes a first-party extension. |
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162 def iscmd(cmd): |
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163 return cmd in wireprotov1server.commands |
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164 |
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165 def handlewsgirequest(rctx, req, res, checkperm): |
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166 """Possibly process a wire protocol request. |
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167 |
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168 If the current request is a wire protocol request, the request is |
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169 processed by this function. |
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170 |
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171 ``req`` is a ``parsedrequest`` instance. |
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172 ``res`` is a ``wsgiresponse`` instance. |
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173 |
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174 Returns a bool indicating if the request was serviced. If set, the caller |
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175 should stop processing the request, as a response has already been issued. |
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176 """ |
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177 # Avoid cycle involving hg module. |
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178 from .hgweb import common as hgwebcommon |
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179 |
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180 repo = rctx.repo |
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181 |
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182 # HTTP version 1 wire protocol requests are denoted by a "cmd" query |
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183 # string parameter. If it isn't present, this isn't a wire protocol |
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184 # request. |
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185 if 'cmd' not in req.qsparams: |
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186 return False |
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187 |
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188 cmd = req.qsparams['cmd'] |
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189 |
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190 # The "cmd" request parameter is used by both the wire protocol and hgweb. |
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191 # While not all wire protocol commands are available for all transports, |
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192 # if we see a "cmd" value that resembles a known wire protocol command, we |
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193 # route it to a protocol handler. This is better than routing possible |
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194 # wire protocol requests to hgweb because it prevents hgweb from using |
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195 # known wire protocol commands and it is less confusing for machine |
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196 # clients. |
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197 if not iscmd(cmd): |
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198 return False |
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199 |
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200 # The "cmd" query string argument is only valid on the root path of the |
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201 # repo. e.g. ``/?cmd=foo``, ``/repo?cmd=foo``. URL paths within the repo |
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202 # like ``/blah?cmd=foo`` are not allowed. So don't recognize the request |
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203 # in this case. We send an HTTP 404 for backwards compatibility reasons. |
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204 if req.dispatchpath: |
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205 res.status = hgwebcommon.statusmessage(404) |
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206 res.headers['Content-Type'] = HGTYPE |
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207 # TODO This is not a good response to issue for this request. This |
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208 # is mostly for BC for now. |
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209 res.setbodybytes('0\n%s\n' % b'Not Found') |
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210 return True |
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211 |
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212 proto = httpv1protocolhandler(req, repo.ui, |
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213 lambda perm: checkperm(rctx, req, perm)) |
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214 |
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215 # The permissions checker should be the only thing that can raise an |
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216 # ErrorResponse. It is kind of a layer violation to catch an hgweb |
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217 # exception here. So consider refactoring into a exception type that |
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218 # is associated with the wire protocol. |
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219 try: |
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220 _callhttp(repo, req, res, proto, cmd) |
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221 except hgwebcommon.ErrorResponse as e: |
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222 for k, v in e.headers: |
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223 res.headers[k] = v |
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224 res.status = hgwebcommon.statusmessage(e.code, pycompat.bytestr(e)) |
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225 # TODO This response body assumes the failed command was |
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226 # "unbundle." That assumption is not always valid. |
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227 res.setbodybytes('0\n%s\n' % pycompat.bytestr(e)) |
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228 |
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229 return True |
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230 |
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231 def _availableapis(repo): |
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232 apis = set() |
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233 |
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234 # Registered APIs are made available via config options of the name of |
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235 # the protocol. |
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236 for k, v in API_HANDLERS.items(): |
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237 section, option = v['config'] |
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238 if repo.ui.configbool(section, option): |
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239 apis.add(k) |
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240 |
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241 return apis |
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242 |
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243 def handlewsgiapirequest(rctx, req, res, checkperm): |
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244 """Handle requests to /api/*.""" |
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245 assert req.dispatchparts[0] == b'api' |
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246 |
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247 repo = rctx.repo |
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248 |
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249 # This whole URL space is experimental for now. But we want to |
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250 # reserve the URL space. So, 404 all URLs if the feature isn't enabled. |
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251 if not repo.ui.configbool('experimental', 'web.apiserver'): |
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252 res.status = b'404 Not Found' |
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253 res.headers[b'Content-Type'] = b'text/plain' |
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254 res.setbodybytes(_('Experimental API server endpoint not enabled')) |
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255 return |
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256 |
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257 # The URL space is /api/<protocol>/*. The structure of URLs under varies |
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258 # by <protocol>. |
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259 |
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260 availableapis = _availableapis(repo) |
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261 |
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262 # Requests to /api/ list available APIs. |
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263 if req.dispatchparts == [b'api']: |
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264 res.status = b'200 OK' |
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265 res.headers[b'Content-Type'] = b'text/plain' |
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266 lines = [_('APIs can be accessed at /api/<name>, where <name> can be ' |
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267 'one of the following:\n')] |
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268 if availableapis: |
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269 lines.extend(sorted(availableapis)) |
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270 else: |
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271 lines.append(_('(no available APIs)\n')) |
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272 res.setbodybytes(b'\n'.join(lines)) |
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273 return |
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274 |
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275 proto = req.dispatchparts[1] |
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276 |
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277 if proto not in API_HANDLERS: |
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278 res.status = b'404 Not Found' |
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279 res.headers[b'Content-Type'] = b'text/plain' |
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280 res.setbodybytes(_('Unknown API: %s\nKnown APIs: %s') % ( |
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281 proto, b', '.join(sorted(availableapis)))) |
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282 return |
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283 |
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284 if proto not in availableapis: |
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285 res.status = b'404 Not Found' |
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286 res.headers[b'Content-Type'] = b'text/plain' |
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287 res.setbodybytes(_('API %s not enabled\n') % proto) |
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288 return |
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289 |
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290 API_HANDLERS[proto]['handler'](rctx, req, res, checkperm, |
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291 req.dispatchparts[2:]) |
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292 |
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293 # Maps API name to metadata so custom API can be registered. |
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294 # Keys are: |
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295 # |
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296 # config |
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297 # Config option that controls whether service is enabled. |
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298 # handler |
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299 # Callable receiving (rctx, req, res, checkperm, urlparts) that is called |
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300 # when a request to this API is received. |
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301 # apidescriptor |
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302 # Callable receiving (req, repo) that is called to obtain an API |
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303 # descriptor for this service. The response must be serializable to CBOR. |
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304 API_HANDLERS = { |
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305 wireprotov2server.HTTP_WIREPROTO_V2: { |
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306 'config': ('experimental', 'web.api.http-v2'), |
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307 'handler': wireprotov2server.handlehttpv2request, |
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308 'apidescriptor': wireprotov2server.httpv2apidescriptor, |
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309 }, |
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310 } |
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311 |
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312 def _httpresponsetype(ui, proto, prefer_uncompressed): |
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313 """Determine the appropriate response type and compression settings. |
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314 |
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315 Returns a tuple of (mediatype, compengine, engineopts). |
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316 """ |
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317 # Determine the response media type and compression engine based |
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318 # on the request parameters. |
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319 |
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320 if '0.2' in proto.getprotocaps(): |
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321 # All clients are expected to support uncompressed data. |
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322 if prefer_uncompressed: |
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323 return HGTYPE2, util._noopengine(), {} |
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324 |
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325 # Now find an agreed upon compression format. |
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326 compformats = wireprotov1server.clientcompressionsupport(proto) |
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327 for engine in wireprototypes.supportedcompengines(ui, util.SERVERROLE): |
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328 if engine.wireprotosupport().name in compformats: |
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329 opts = {} |
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330 level = ui.configint('server', '%slevel' % engine.name()) |
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331 if level is not None: |
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332 opts['level'] = level |
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333 |
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334 return HGTYPE2, engine, opts |
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335 |
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336 # No mutually supported compression format. Fall back to the |
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337 # legacy protocol. |
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338 |
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339 # Don't allow untrusted settings because disabling compression or |
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340 # setting a very high compression level could lead to flooding |
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341 # the server's network or CPU. |
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342 opts = {'level': ui.configint('server', 'zliblevel')} |
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343 return HGTYPE, util.compengines['zlib'], opts |
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344 |
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345 def processcapabilitieshandshake(repo, req, res, proto): |
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346 """Called during a ?cmd=capabilities request. |
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347 |
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348 If the client is advertising support for a newer protocol, we send |
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349 a CBOR response with information about available services. If no |
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350 advertised services are available, we don't handle the request. |
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351 """ |
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352 # Fall back to old behavior unless the API server is enabled. |
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353 if not repo.ui.configbool('experimental', 'web.apiserver'): |
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354 return False |
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355 |
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356 clientapis = decodevaluefromheaders(req, b'X-HgUpgrade') |
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357 protocaps = decodevaluefromheaders(req, b'X-HgProto') |
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358 if not clientapis or not protocaps: |
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359 return False |
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360 |
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361 # We currently only support CBOR responses. |
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362 protocaps = set(protocaps.split(' ')) |
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363 if b'cbor' not in protocaps: |
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364 return False |
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365 |
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366 descriptors = {} |
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367 |
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368 for api in sorted(set(clientapis.split()) & _availableapis(repo)): |
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369 handler = API_HANDLERS[api] |
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370 |
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371 descriptorfn = handler.get('apidescriptor') |
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372 if not descriptorfn: |
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373 continue |
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374 |
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375 descriptors[api] = descriptorfn(req, repo) |
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376 |
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377 v1caps = wireprotov1server.dispatch(repo, proto, 'capabilities') |
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378 assert isinstance(v1caps, wireprototypes.bytesresponse) |
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379 |
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380 m = { |
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381 # TODO allow this to be configurable. |
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382 'apibase': 'api/', |
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383 'apis': descriptors, |
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384 'v1capabilities': v1caps.data, |
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385 } |
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386 |
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387 res.status = b'200 OK' |
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388 res.headers[b'Content-Type'] = b'application/mercurial-cbor' |
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389 res.setbodybytes(b''.join(cborutil.streamencode(m))) |
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390 |
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391 return True |
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392 |
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393 def _callhttp(repo, req, res, proto, cmd): |
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394 # Avoid cycle involving hg module. |
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395 from .hgweb import common as hgwebcommon |
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396 |
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397 def genversion2(gen, engine, engineopts): |
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398 # application/mercurial-0.2 always sends a payload header |
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399 # identifying the compression engine. |
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400 name = engine.wireprotosupport().name |
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401 assert 0 < len(name) < 256 |
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402 yield struct.pack('B', len(name)) |
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403 yield name |
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404 |
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405 for chunk in gen: |
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406 yield chunk |
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407 |
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408 def setresponse(code, contenttype, bodybytes=None, bodygen=None): |
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409 if code == HTTP_OK: |
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410 res.status = '200 Script output follows' |
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411 else: |
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412 res.status = hgwebcommon.statusmessage(code) |
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413 |
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414 res.headers['Content-Type'] = contenttype |
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415 |
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416 if bodybytes is not None: |
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417 res.setbodybytes(bodybytes) |
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418 if bodygen is not None: |
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419 res.setbodygen(bodygen) |
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420 |
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421 if not wireprotov1server.commands.commandavailable(cmd, proto): |
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422 setresponse(HTTP_OK, HGERRTYPE, |
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423 _('requested wire protocol command is not available over ' |
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424 'HTTP')) |
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425 return |
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426 |
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427 proto.checkperm(wireprotov1server.commands[cmd].permission) |
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428 |
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429 # Possibly handle a modern client wanting to switch protocols. |
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430 if (cmd == 'capabilities' and |
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431 processcapabilitieshandshake(repo, req, res, proto)): |
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432 |
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433 return |
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434 |
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435 rsp = wireprotov1server.dispatch(repo, proto, cmd) |
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436 |
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437 if isinstance(rsp, bytes): |
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438 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp) |
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439 elif isinstance(rsp, wireprototypes.bytesresponse): |
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440 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp.data) |
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441 elif isinstance(rsp, wireprototypes.streamreslegacy): |
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442 setresponse(HTTP_OK, HGTYPE, bodygen=rsp.gen) |
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443 elif isinstance(rsp, wireprototypes.streamres): |
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444 gen = rsp.gen |
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445 |
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446 # This code for compression should not be streamres specific. It |
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447 # is here because we only compress streamres at the moment. |
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448 mediatype, engine, engineopts = _httpresponsetype( |
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449 repo.ui, proto, rsp.prefer_uncompressed) |
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450 gen = engine.compressstream(gen, engineopts) |
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451 |
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452 if mediatype == HGTYPE2: |
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453 gen = genversion2(gen, engine, engineopts) |
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changeset
|
454 |
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a88d68dc3ee8
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Gregory Szorc <gregory.szorc@gmail.com>
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diff
changeset
|
455 setresponse(HTTP_OK, mediatype, bodygen=gen) |
36073
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wireprototypes: move wire protocol response types to new module
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diff
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|
456 elif isinstance(rsp, wireprototypes.pushres): |
36067
caca3ac2ac04
wireproto: use maybecapturestdio() for push responses (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36066
diff
changeset
|
457 rsp = '%d\n%s' % (rsp.res, rsp.output) |
36861
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diff
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|
458 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp) |
36073
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diff
changeset
|
459 elif isinstance(rsp, wireprototypes.pusherr): |
12703
40bb5853fc4b
wireproto: introduce pusherr() to deal with "unsynced changes" error
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
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diff
changeset
|
460 rsp = '0\n%s\n' % rsp.res |
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diff
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|
461 res.drain = True |
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diff
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|
462 setresponse(HTTP_OK, HGTYPE, bodybytes=rsp) |
36073
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parents:
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diff
changeset
|
463 elif isinstance(rsp, wireprototypes.ooberror): |
36861
a88d68dc3ee8
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parents:
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diff
changeset
|
464 setresponse(HTTP_OK, HGERRTYPE, bodybytes=rsp.message) |
a88d68dc3ee8
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parents:
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diff
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|
465 else: |
a88d68dc3ee8
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parents:
36857
diff
changeset
|
466 raise error.ProgrammingError('hgweb.protocol internal failure', rsp) |
35986
98a00aa0288d
wireprotoserver: move error response handling out of hgweb
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35984
diff
changeset
|
467 |
36064
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
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diff
changeset
|
468 def _sshv1respondbytes(fout, value): |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
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diff
changeset
|
469 """Send a bytes response for protocol version 1.""" |
5767664d39a5
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parents:
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diff
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|
470 fout.write('%d\n' % len(value)) |
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wireprotoserver: extract SSH response handling functions
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parents:
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diff
changeset
|
471 fout.write(value) |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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diff
changeset
|
472 fout.flush() |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
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diff
changeset
|
473 |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
35988
diff
changeset
|
474 def _sshv1respondstream(fout, source): |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
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diff
changeset
|
475 write = fout.write |
5767664d39a5
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diff
changeset
|
476 for chunk in source.gen: |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
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diff
changeset
|
477 write(chunk) |
5767664d39a5
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parents:
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diff
changeset
|
478 fout.flush() |
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wireprotoserver: extract SSH response handling functions
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parents:
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diff
changeset
|
479 |
5767664d39a5
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
480 def _sshv1respondooberror(fout, ferr, rsp): |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
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diff
changeset
|
481 ferr.write(b'%s\n-\n' % rsp) |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
35988
diff
changeset
|
482 ferr.flush() |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
35988
diff
changeset
|
483 fout.write(b'\n') |
5767664d39a5
wireprotoserver: extract SSH response handling functions
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parents:
35988
diff
changeset
|
484 fout.flush() |
5767664d39a5
wireprotoserver: extract SSH response handling functions
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35988
diff
changeset
|
485 |
37810
856f381ad74b
interfaceutil: module to stub out zope.interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37785
diff
changeset
|
486 @interfaceutil.implementer(wireprototypes.baseprotocolhandler) |
37296
78103e4138b1
wireproto: port protocol handler to zope.interface
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parents:
37295
diff
changeset
|
487 class sshv1protocolhandler(object): |
36065
bf676267f64f
wireprotoserver: split ssh protocol handler and server
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parents:
36064
diff
changeset
|
488 """Handler for requests services via version 1 of SSH protocol.""" |
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wireprotoserver: split ssh protocol handler and server
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parents:
36064
diff
changeset
|
489 def __init__(self, ui, fin, fout): |
35870
f1efc0caeab7
wireprotoserver: make some instance attributes private
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parents:
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diff
changeset
|
490 self._ui = ui |
36065
bf676267f64f
wireprotoserver: split ssh protocol handler and server
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parents:
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diff
changeset
|
491 self._fin = fin |
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wireprotoserver: split ssh protocol handler and server
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diff
changeset
|
492 self._fout = fout |
37393
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wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
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diff
changeset
|
493 self._protocaps = set() |
35859
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wireprotoserver: move sshserver into module (API)
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parents:
35858
diff
changeset
|
494 |
35873
29759c46aa1a
wireprotoserver: make name part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35872
diff
changeset
|
495 @property |
29759c46aa1a
wireprotoserver: make name part of protocol interface
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parents:
35872
diff
changeset
|
496 def name(self): |
36536
3cd245945ef3
wireprotoserver: move SSHV1 and SSHV2 constants to wireprototypes
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36526
diff
changeset
|
497 return wireprototypes.SSHV1 |
35873
29759c46aa1a
wireprotoserver: make name part of protocol interface
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parents:
35872
diff
changeset
|
498 |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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parents:
35858
diff
changeset
|
499 def getargs(self, args): |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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parents:
35858
diff
changeset
|
500 data = {} |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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parents:
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diff
changeset
|
501 keys = args.split() |
38783
e7aa113b14f7
global: use pycompat.xrange()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37945
diff
changeset
|
502 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
|
503 argline = self._fin.readline()[:-1] |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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parents:
35858
diff
changeset
|
504 arg, l = argline.split() |
1bf5263fe5cc
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parents:
35858
diff
changeset
|
505 if arg not in keys: |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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parents:
35858
diff
changeset
|
506 raise error.Abort(_("unexpected parameter %r") % arg) |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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parents:
35858
diff
changeset
|
507 if arg == '*': |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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parents:
35858
diff
changeset
|
508 star = {} |
38783
e7aa113b14f7
global: use pycompat.xrange()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37945
diff
changeset
|
509 for k in pycompat.xrange(int(l)): |
35870
f1efc0caeab7
wireprotoserver: make some instance attributes private
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parents:
35869
diff
changeset
|
510 argline = self._fin.readline()[:-1] |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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parents:
35858
diff
changeset
|
511 arg, l = argline.split() |
35870
f1efc0caeab7
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parents:
35869
diff
changeset
|
512 val = self._fin.read(int(l)) |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
513 star[arg] = val |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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parents:
35858
diff
changeset
|
514 data['*'] = star |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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parents:
35858
diff
changeset
|
515 else: |
35870
f1efc0caeab7
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35869
diff
changeset
|
516 val = self._fin.read(int(l)) |
35859
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wireprotoserver: move sshserver into module (API)
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parents:
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diff
changeset
|
517 data[arg] = val |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
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diff
changeset
|
518 return [data[k] for k in keys] |
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
519 |
37393
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
37296
diff
changeset
|
520 def getprotocaps(self): |
afcfdf53e4b5
wireproto: provide accessors for client capabilities
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parents:
37296
diff
changeset
|
521 return self._protocaps |
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
37296
diff
changeset
|
522 |
37414
2d965bfeb8f6
wireproto: allow direct stream processing for unbundle
Joerg Sonnenberger <joerg@bec.de>
parents:
37393
diff
changeset
|
523 def getpayload(self): |
36372
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36371
diff
changeset
|
524 # We initially send an empty response. This tells the client it is |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
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36371
diff
changeset
|
525 # 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:
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diff
changeset
|
526 # interprets it as an error. |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
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parents:
36371
diff
changeset
|
527 _sshv1respondbytes(self._fout, b'') |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36371
diff
changeset
|
528 |
36070
90ca4986616c
wireprotoserver: rename getfile() to forwardpayload() (API)
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parents:
36069
diff
changeset
|
529 # The file is in the form: |
90ca4986616c
wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36069
diff
changeset
|
530 # |
90ca4986616c
wireprotoserver: rename getfile() to forwardpayload() (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
531 # <chunk size>\n<chunk> |
90ca4986616c
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parents:
36069
diff
changeset
|
532 # ... |
90ca4986616c
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parents:
36069
diff
changeset
|
533 # 0\n |
35870
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parents:
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diff
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|
534 count = int(self._fin.readline()) |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
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35858
diff
changeset
|
535 while count: |
37414
2d965bfeb8f6
wireproto: allow direct stream processing for unbundle
Joerg Sonnenberger <joerg@bec.de>
parents:
37393
diff
changeset
|
536 yield self._fin.read(count) |
35870
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parents:
35869
diff
changeset
|
537 count = int(self._fin.readline()) |
35859
1bf5263fe5cc
wireprotoserver: move sshserver into module (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35858
diff
changeset
|
538 |
36066
2ad145fbde54
wireprotoserver: add context manager mechanism for redirecting stdio
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36065
diff
changeset
|
539 @contextlib.contextmanager |
2ad145fbde54
wireprotoserver: add context manager mechanism for redirecting stdio
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parents:
36065
diff
changeset
|
540 def mayberedirectstdio(self): |
2ad145fbde54
wireprotoserver: add context manager mechanism for redirecting stdio
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36065
diff
changeset
|
541 yield None |
2ad145fbde54
wireprotoserver: add context manager mechanism for redirecting stdio
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parents:
36065
diff
changeset
|
542 |
36069
957e773614d0
wireprotoserver: rename _client to client (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36068
diff
changeset
|
543 def client(self): |
36065
bf676267f64f
wireprotoserver: split ssh protocol handler and server
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
544 client = encoding.environ.get('SSH_CLIENT', '').split(' ', 1)[0] |
bf676267f64f
wireprotoserver: split ssh protocol handler and server
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diff
changeset
|
545 return 'remote:ssh:' + client |
bf676267f64f
wireprotoserver: split ssh protocol handler and server
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parents:
36064
diff
changeset
|
546 |
36613
6e585bca962e
wireproto: add transport specific capabilities in the transport
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parents:
36610
diff
changeset
|
547 def addcapabilities(self, repo, caps): |
37393
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
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37296
diff
changeset
|
548 if self.name == wireprototypes.SSHV1: |
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
37296
diff
changeset
|
549 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
|
550 caps.append(b'batch') |
36613
6e585bca962e
wireproto: add transport specific capabilities in the transport
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36610
diff
changeset
|
551 return caps |
6e585bca962e
wireproto: add transport specific capabilities in the transport
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36610
diff
changeset
|
552 |
36801
66de4555cefd
wireproto: formalize permissions checking as part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36800
diff
changeset
|
553 def checkperm(self, perm): |
66de4555cefd
wireproto: formalize permissions checking as part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36800
diff
changeset
|
554 pass |
66de4555cefd
wireproto: formalize permissions checking as part of protocol interface
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36800
diff
changeset
|
555 |
36215
464bedc0fdb4
wireprotoserver: handle SSH protocol version 2 upgrade requests
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36214
diff
changeset
|
556 class sshv2protocolhandler(sshv1protocolhandler): |
464bedc0fdb4
wireprotoserver: handle SSH protocol version 2 upgrade requests
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36214
diff
changeset
|
557 """Protocol handler for version 2 of the SSH protocol.""" |
464bedc0fdb4
wireprotoserver: handle SSH protocol version 2 upgrade requests
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36214
diff
changeset
|
558 |
36610
af0d38f015bb
wireprotoserver: identify requests via version 2 of SSH protocol as such
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36536
diff
changeset
|
559 @property |
af0d38f015bb
wireprotoserver: identify requests via version 2 of SSH protocol as such
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parents:
36536
diff
changeset
|
560 def name(self): |
af0d38f015bb
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diff
changeset
|
561 return wireprototypes.SSHV2 |
af0d38f015bb
wireprotoserver: identify requests via version 2 of SSH protocol as such
Gregory Szorc <gregory.szorc@gmail.com>
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36536
diff
changeset
|
562 |
37533
df4985497986
wireproto: implement capabilities for wire protocol v2
Gregory Szorc <gregory.szorc@gmail.com>
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diff
changeset
|
563 def addcapabilities(self, repo, caps): |
df4985497986
wireproto: implement capabilities for wire protocol v2
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37485
diff
changeset
|
564 return caps |
df4985497986
wireproto: implement capabilities for wire protocol v2
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37485
diff
changeset
|
565 |
36523
e7411fb7ba7f
wireprotoserver: ability to run an SSH server until an event is set
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36372
diff
changeset
|
566 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
|
567 # 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
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568 # states are defined: |
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569 # |
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570 # protov1-serving |
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571 # Server is in protocol version 1 serving mode. Commands arrive on |
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572 # new lines. These commands are processed in this state, one command |
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573 # after the other. |
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574 # |
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575 # protov2-serving |
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576 # Server is in protocol version 2 serving mode. |
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577 # |
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578 # upgrade-initial |
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579 # The server is going to process an upgrade request. |
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580 # |
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581 # upgrade-v2-filter-legacy-handshake |
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582 # The protocol is being upgraded to version 2. The server is expecting |
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583 # the legacy handshake from version 1. |
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584 # |
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585 # upgrade-v2-finish |
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586 # The upgrade to version 2 of the protocol is imminent. |
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587 # |
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588 # shutdown |
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589 # The server is shutting down, possibly in reaction to a client event. |
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590 # |
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591 # And here are their transitions: |
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592 # |
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593 # protov1-serving -> shutdown |
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594 # When server receives an empty request or encounters another |
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595 # error. |
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596 # |
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597 # protov1-serving -> upgrade-initial |
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598 # An upgrade request line was seen. |
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599 # |
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600 # upgrade-initial -> upgrade-v2-filter-legacy-handshake |
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601 # Upgrade to version 2 in progress. Server is expecting to |
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602 # process a legacy handshake. |
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603 # |
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604 # upgrade-v2-filter-legacy-handshake -> shutdown |
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605 # Client did not fulfill upgrade handshake requirements. |
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606 # |
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607 # upgrade-v2-filter-legacy-handshake -> upgrade-v2-finish |
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608 # Client fulfilled version 2 upgrade requirements. Finishing that |
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609 # upgrade. |
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610 # |
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611 # upgrade-v2-finish -> protov2-serving |
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612 # Protocol upgrade to version 2 complete. Server can now speak protocol |
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613 # version 2. |
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614 # |
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615 # protov2-serving -> protov1-serving |
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616 # Ths happens by default since protocol version 2 is the same as |
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617 # version 1 except for the handshake. |
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618 |
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619 state = 'protov1-serving' |
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620 proto = sshv1protocolhandler(ui, fin, fout) |
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621 protoswitched = False |
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622 |
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623 while not ev.is_set(): |
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624 if state == 'protov1-serving': |
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625 # Commands are issued on new lines. |
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626 request = fin.readline()[:-1] |
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627 |
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628 # Empty lines signal to terminate the connection. |
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629 if not request: |
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630 state = 'shutdown' |
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631 continue |
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632 |
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633 # It looks like a protocol upgrade request. Transition state to |
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634 # handle it. |
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635 if request.startswith(b'upgrade '): |
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636 if protoswitched: |
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637 _sshv1respondooberror(fout, ui.ferr, |
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638 b'cannot upgrade protocols multiple ' |
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639 b'times') |
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640 state = 'shutdown' |
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641 continue |
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642 |
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643 state = 'upgrade-initial' |
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644 continue |
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645 |
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646 available = wireprotov1server.commands.commandavailable( |
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647 request, proto) |
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648 |
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649 # This command isn't available. Send an empty response and go |
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650 # back to waiting for a new command. |
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651 if not available: |
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652 _sshv1respondbytes(fout, b'') |
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653 continue |
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654 |
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655 rsp = wireprotov1server.dispatch(repo, proto, request) |
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656 |
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657 if isinstance(rsp, bytes): |
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658 _sshv1respondbytes(fout, rsp) |
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659 elif isinstance(rsp, wireprototypes.bytesresponse): |
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660 _sshv1respondbytes(fout, rsp.data) |
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661 elif isinstance(rsp, wireprototypes.streamres): |
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662 _sshv1respondstream(fout, rsp) |
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663 elif isinstance(rsp, wireprototypes.streamreslegacy): |
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664 _sshv1respondstream(fout, rsp) |
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665 elif isinstance(rsp, wireprototypes.pushres): |
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666 _sshv1respondbytes(fout, b'') |
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667 _sshv1respondbytes(fout, b'%d' % rsp.res) |
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668 elif isinstance(rsp, wireprototypes.pusherr): |
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669 _sshv1respondbytes(fout, rsp.res) |
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670 elif isinstance(rsp, wireprototypes.ooberror): |
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671 _sshv1respondooberror(fout, ui.ferr, rsp.message) |
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672 else: |
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673 raise error.ProgrammingError('unhandled response type from ' |
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674 'wire protocol command: %s' % rsp) |
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675 |
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676 # For now, protocol version 2 serving just goes back to version 1. |
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677 elif state == 'protov2-serving': |
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678 state = 'protov1-serving' |
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679 continue |
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680 |
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681 elif state == 'upgrade-initial': |
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682 # We should never transition into this state if we've switched |
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683 # protocols. |
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684 assert not protoswitched |
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685 assert proto.name == wireprototypes.SSHV1 |
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686 |
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687 # Expected: upgrade <token> <capabilities> |
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688 # If we get something else, the request is malformed. It could be |
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689 # from a future client that has altered the upgrade line content. |
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690 # We treat this as an unknown command. |
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691 try: |
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692 token, caps = request.split(b' ')[1:] |
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693 except ValueError: |
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694 _sshv1respondbytes(fout, b'') |
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695 state = 'protov1-serving' |
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696 continue |
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|
697 |
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|
698 # Send empty response if we don't support upgrading protocols. |
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699 if not ui.configbool('experimental', 'sshserver.support-v2'): |
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700 _sshv1respondbytes(fout, b'') |
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701 state = 'protov1-serving' |
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702 continue |
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|
703 |
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|
704 try: |
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705 caps = urlreq.parseqs(caps) |
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706 except ValueError: |
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707 _sshv1respondbytes(fout, b'') |
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708 state = 'protov1-serving' |
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|
709 continue |
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|
710 |
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711 # We don't see an upgrade request to protocol version 2. Ignore |
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712 # the upgrade request. |
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713 wantedprotos = caps.get(b'proto', [b''])[0] |
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714 if SSHV2 not in wantedprotos: |
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715 _sshv1respondbytes(fout, b'') |
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716 state = 'protov1-serving' |
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|
717 continue |
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|
718 |
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|
719 # It looks like we can honor this upgrade request to protocol 2. |
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720 # Filter the rest of the handshake protocol request lines. |
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721 state = 'upgrade-v2-filter-legacy-handshake' |
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|
722 continue |
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|
723 |
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|
724 elif state == 'upgrade-v2-filter-legacy-handshake': |
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725 # Client should have sent legacy handshake after an ``upgrade`` |
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726 # request. Expected lines: |
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|
727 # |
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|
728 # hello |
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|
729 # between |
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|
730 # pairs 81 |
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|
731 # 0000...-0000... |
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|
732 |
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|
733 ok = True |
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diff
changeset
|
734 for line in (b'hello', b'between', b'pairs 81'): |
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|
735 request = fin.readline()[:-1] |
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|
736 |
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|
737 if request != line: |
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|
738 _sshv1respondooberror(fout, ui.ferr, |
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changeset
|
739 b'malformed handshake protocol: ' |
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|
740 b'missing %s' % line) |
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changeset
|
741 ok = False |
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|
742 state = 'shutdown' |
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|
743 break |
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changeset
|
744 |
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changeset
|
745 if not ok: |
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|
746 continue |
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diff
changeset
|
747 |
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changeset
|
748 request = fin.read(81) |
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changeset
|
749 if request != b'%s-%s' % (b'0' * 40, b'0' * 40): |
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changeset
|
750 _sshv1respondooberror(fout, ui.ferr, |
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diff
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|
751 b'malformed handshake protocol: ' |
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diff
changeset
|
752 b'missing between argument value') |
464bedc0fdb4
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diff
changeset
|
753 state = 'shutdown' |
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diff
changeset
|
754 continue |
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36214
diff
changeset
|
755 |
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diff
changeset
|
756 state = 'upgrade-v2-finish' |
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36214
diff
changeset
|
757 continue |
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parents:
36214
diff
changeset
|
758 |
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changeset
|
759 elif state == 'upgrade-v2-finish': |
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diff
changeset
|
760 # Send the upgrade response. |
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diff
changeset
|
761 fout.write(b'upgraded %s %s\n' % (token, SSHV2)) |
37785
b4d85bc122bd
wireproto: rename wireproto to wireprotov1server (API)
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37783
diff
changeset
|
762 servercaps = wireprotov1server.capabilities(repo, proto) |
36215
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changeset
|
763 rsp = b'capabilities: %s' % servercaps.data |
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diff
changeset
|
764 fout.write(b'%d\n%s\n' % (len(rsp), rsp)) |
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diff
changeset
|
765 fout.flush() |
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diff
changeset
|
766 |
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diff
changeset
|
767 proto = sshv2protocolhandler(ui, fin, fout) |
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diff
changeset
|
768 protoswitched = True |
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diff
changeset
|
769 |
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diff
changeset
|
770 state = 'protov2-serving' |
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diff
changeset
|
771 continue |
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diff
changeset
|
772 |
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diff
changeset
|
773 elif state == 'shutdown': |
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changeset
|
774 break |
3b3a987bbbaa
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diff
changeset
|
775 |
3b3a987bbbaa
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Gregory Szorc <gregory.szorc@gmail.com>
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diff
changeset
|
776 else: |
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diff
changeset
|
777 raise error.ProgrammingError('unhandled ssh server state: %s' % |
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diff
changeset
|
778 state) |
3b3a987bbbaa
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diff
changeset
|
779 |
36065
bf676267f64f
wireprotoserver: split ssh protocol handler and server
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diff
changeset
|
780 class sshserver(object): |
36526
7cc4a9b9732a
wireprotoserver: support logging SSH server I/O to a file descriptor
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36523
diff
changeset
|
781 def __init__(self, ui, repo, logfh=None): |
36065
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diff
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|
782 self._ui = ui |
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|
783 self._repo = repo |
41285
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ui: proxy protect/restorestdio() calls to update internal flag
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diff
changeset
|
784 self._fin, self._fout = ui.protectfinout() |
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diff
changeset
|
785 |
36526
7cc4a9b9732a
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36523
diff
changeset
|
786 # Log write I/O to stdout and stderr if configured. |
7cc4a9b9732a
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changeset
|
787 if logfh: |
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diff
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|
788 self._fout = util.makeloggingfileobject( |
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diff
changeset
|
789 logfh, self._fout, 'o', logdata=True) |
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diff
changeset
|
790 ui.ferr = util.makeloggingfileobject( |
7cc4a9b9732a
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diff
changeset
|
791 logfh, ui.ferr, 'e', logdata=True) |
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diff
changeset
|
792 |
35859
1bf5263fe5cc
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parents:
35858
diff
changeset
|
793 def serve_forever(self): |
36523
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diff
changeset
|
794 self.serveuntil(threading.Event()) |
41285
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diff
changeset
|
795 self._ui.restorefinout(self._fin, self._fout) |
35859
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diff
changeset
|
796 sys.exit(0) |
36523
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36372
diff
changeset
|
797 |
e7411fb7ba7f
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36372
diff
changeset
|
798 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
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799 """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
|
800 _runsshserver(self._ui, self._repo, self._fin, self._fout, ev) |