Mercurial > hg
annotate mercurial/sshpeer.py @ 49541:976648e20856
tests: remove non-python3 line matching and tests block
We don't support Python2 anymore
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Thu, 22 Sep 2022 16:27:17 +0200 |
parents | 642e31cb55f0 |
children | 78af51ba73c5 |
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peer: introduce real peer classes
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1 # sshpeer.py - ssh repository proxy class for mercurial |
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2 # |
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3 # Copyright 2005, 2006 Olivia Mackall <olivia@selenic.com> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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8 |
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9 import re |
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10 import uuid |
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11 |
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12 from .i18n import _ |
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13 from .pycompat import getattr |
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14 from . import ( |
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15 error, |
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16 pycompat, |
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17 util, |
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18 wireprototypes, |
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19 wireprotov1peer, |
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20 wireprotov1server, |
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21 ) |
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22 from .utils import ( |
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23 procutil, |
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24 stringutil, |
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25 urlutil, |
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26 ) |
60 | 27 |
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28 |
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29 def _serverquote(s): |
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30 """quote a string for the remote shell ... which we assume is sh""" |
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31 if not s: |
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32 return s |
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33 if re.match(b'[a-zA-Z0-9@%_+=:,./-]*$', s): |
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34 return s |
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35 return b"'%s'" % s.replace(b"'", b"'\\''") |
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36 |
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37 |
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38 def _forwardoutput(ui, pipe, warn=False): |
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39 """display all data currently available on pipe as remote output. |
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40 |
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41 This is non blocking.""" |
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42 if pipe and not pipe.closed: |
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43 s = procutil.readpipe(pipe) |
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44 if s: |
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45 display = ui.warn if warn else ui.status |
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46 for l in s.splitlines(): |
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47 display(_(b"remote: "), l, b'\n') |
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48 |
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49 |
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50 class doublepipe: |
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51 """Operate a side-channel pipe in addition of a main one |
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52 |
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53 The side-channel pipe contains server output to be forwarded to the user |
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54 input. The double pipe will behave as the "main" pipe, but will ensure the |
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55 content of the "side" pipe is properly processed while we wait for blocking |
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56 call on the "main" pipe. |
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57 |
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58 If large amounts of data are read from "main", the forward will cease after |
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59 the first bytes start to appear. This simplifies the implementation |
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60 without affecting actual output of sshpeer too much as we rarely issue |
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61 large read for data not yet emitted by the server. |
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62 |
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63 The main pipe is expected to be a 'bufferedinputpipe' from the util module |
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64 that handle all the os specific bits. This class lives in this module |
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65 because it focus on behavior specific to the ssh protocol.""" |
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66 |
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67 def __init__(self, ui, main, side): |
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68 self._ui = ui |
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69 self._main = main |
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70 self._side = side |
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71 |
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72 def _wait(self): |
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73 """wait until some data are available on main or side |
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74 |
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75 return a pair of boolean (ismainready, issideready) |
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76 |
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77 (This will only wait for data if the setup is supported by `util.poll`) |
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78 """ |
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79 if ( |
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80 isinstance(self._main, util.bufferedinputpipe) |
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81 and self._main.hasbuffer |
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82 ): |
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83 # Main has data. Assume side is worth poking at. |
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84 return True, True |
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85 |
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86 fds = [self._main.fileno(), self._side.fileno()] |
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87 try: |
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88 act = util.poll(fds) |
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89 except NotImplementedError: |
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90 # non supported yet case, assume all have data. |
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91 act = fds |
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92 return (self._main.fileno() in act, self._side.fileno() in act) |
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93 |
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94 def write(self, data): |
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95 return self._call(b'write', data) |
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96 |
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97 def read(self, size): |
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98 r = self._call(b'read', size) |
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99 if size != 0 and not r: |
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100 # We've observed a condition that indicates the |
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101 # stdout closed unexpectedly. Check stderr one |
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102 # more time and snag anything that's there before |
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103 # letting anyone know the main part of the pipe |
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104 # closed prematurely. |
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105 _forwardoutput(self._ui, self._side) |
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106 return r |
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107 |
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108 def unbufferedread(self, size): |
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109 r = self._call(b'unbufferedread', size) |
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110 if size != 0 and not r: |
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111 # We've observed a condition that indicates the |
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112 # stdout closed unexpectedly. Check stderr one |
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113 # more time and snag anything that's there before |
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114 # letting anyone know the main part of the pipe |
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115 # closed prematurely. |
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116 _forwardoutput(self._ui, self._side) |
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117 return r |
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118 |
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119 def readline(self): |
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120 return self._call(b'readline') |
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121 |
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122 def _call(self, methname, data=None): |
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123 """call <methname> on "main", forward output of "side" while blocking""" |
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124 # data can be '' or 0 |
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125 if (data is not None and not data) or self._main.closed: |
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126 _forwardoutput(self._ui, self._side) |
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127 return b'' |
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128 while True: |
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129 mainready, sideready = self._wait() |
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130 if sideready: |
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131 _forwardoutput(self._ui, self._side) |
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132 if mainready: |
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133 meth = getattr(self._main, methname) |
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134 if data is None: |
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135 return meth() |
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136 else: |
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137 return meth(data) |
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138 |
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139 def close(self): |
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140 return self._main.close() |
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141 |
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142 @property |
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143 def closed(self): |
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144 return self._main.closed |
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145 |
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146 def flush(self): |
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147 return self._main.flush() |
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148 |
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149 |
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150 def _cleanuppipes(ui, pipei, pipeo, pipee, warn): |
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151 """Clean up pipes used by an SSH connection.""" |
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152 didsomething = False |
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153 if pipeo and not pipeo.closed: |
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154 didsomething = True |
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155 pipeo.close() |
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156 if pipei and not pipei.closed: |
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157 didsomething = True |
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158 pipei.close() |
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159 |
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160 if pipee and not pipee.closed: |
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161 didsomething = True |
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162 # Try to read from the err descriptor until EOF. |
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163 try: |
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164 for l in pipee: |
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165 ui.status(_(b'remote: '), l) |
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166 except (IOError, ValueError): |
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167 pass |
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168 |
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169 pipee.close() |
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170 |
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171 if didsomething and warn is not None: |
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172 # Encourage explicit close of sshpeers. Closing via __del__ is |
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173 # not very predictable when exceptions are thrown, which has led |
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174 # to deadlocks due to a peer get gc'ed in a fork |
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175 # We add our own stack trace, because the stacktrace when called |
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176 # from __del__ is useless. |
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177 ui.develwarn(b'missing close on SSH connection created at:\n%s' % warn) |
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178 |
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179 |
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180 def _makeconnection(ui, sshcmd, args, remotecmd, path, sshenv=None): |
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181 """Create an SSH connection to a server. |
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182 |
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183 Returns a tuple of (process, stdin, stdout, stderr) for the |
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184 spawned process. |
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185 """ |
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186 cmd = b'%s %s %s' % ( |
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187 sshcmd, |
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188 args, |
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189 procutil.shellquote( |
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190 b'%s -R %s serve --stdio' |
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191 % (_serverquote(remotecmd), _serverquote(path)) |
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192 ), |
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193 ) |
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194 |
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195 ui.debug(b'running %s\n' % cmd) |
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196 |
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197 # no buffer allow the use of 'select' |
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198 # feel free to remove buffering and select usage when we ultimately |
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199 # move to threading. |
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200 stdin, stdout, stderr, proc = procutil.popen4(cmd, bufsize=0, env=sshenv) |
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201 |
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202 return proc, stdin, stdout, stderr |
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203 |
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204 |
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205 def _clientcapabilities(): |
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206 """Return list of capabilities of this client. |
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207 |
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208 Returns a list of capabilities that are supported by this client. |
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209 """ |
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210 protoparams = {b'partial-pull'} |
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211 comps = [ |
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212 e.wireprotosupport().name |
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213 for e in util.compengines.supportedwireengines(util.CLIENTROLE) |
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214 ] |
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215 protoparams.add(b'comp=%s' % b','.join(comps)) |
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216 return protoparams |
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217 |
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218 |
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219 def _performhandshake(ui, stdin, stdout, stderr): |
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220 def badresponse(): |
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221 # Flush any output on stderr. In general, the stderr contains errors |
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222 # from the remote (ssh errors, some hg errors), and status indications |
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223 # (like "adding changes"), with no current way to tell them apart. |
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224 # Here we failed so early that it's almost certainly only errors, so |
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225 # use warn=True so -q doesn't hide them. |
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226 _forwardoutput(ui, stderr, warn=True) |
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227 |
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228 msg = _(b'no suitable response from remote hg') |
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229 hint = ui.config(b'ui', b'ssherrorhint') |
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230 raise error.RepoError(msg, hint=hint) |
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231 |
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232 # The handshake consists of sending wire protocol commands in reverse |
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233 # order of protocol implementation and then sniffing for a response |
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234 # to one of them. |
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235 # |
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236 # Those commands (from oldest to newest) are: |
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237 # |
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238 # ``between`` |
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239 # Asks for the set of revisions between a pair of revisions. Command |
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240 # present in all Mercurial server implementations. |
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241 # |
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242 # ``hello`` |
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243 # Instructs the server to advertise its capabilities. Introduced in |
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244 # Mercurial 0.9.1. |
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245 # |
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246 # ``upgrade`` |
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247 # Requests upgrade from default transport protocol version 1 to |
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248 # a newer version. Introduced in Mercurial 4.6 as an experimental |
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249 # feature. |
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250 # |
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251 # The ``between`` command is issued with a request for the null |
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252 # range. If the remote is a Mercurial server, this request will |
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253 # generate a specific response: ``1\n\n``. This represents the |
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254 # wire protocol encoded value for ``\n``. We look for ``1\n\n`` |
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255 # in the output stream and know this is the response to ``between`` |
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256 # and we're at the end of our handshake reply. |
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257 # |
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258 # The response to the ``hello`` command will be a line with the |
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259 # length of the value returned by that command followed by that |
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260 # value. If the server doesn't support ``hello`` (which should be |
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261 # rare), that line will be ``0\n``. Otherwise, the value will contain |
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262 # RFC 822 like lines. Of these, the ``capabilities:`` line contains |
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263 # the capabilities of the server. |
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264 # |
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265 # The ``upgrade`` command isn't really a command in the traditional |
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266 # sense of version 1 of the transport because it isn't using the |
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267 # proper mechanism for formatting insteads: instead, it just encodes |
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268 # arguments on the line, delimited by spaces. |
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269 # |
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270 # The ``upgrade`` line looks like ``upgrade <token> <capabilities>``. |
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271 # If the server doesn't support protocol upgrades, it will reply to |
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272 # this line with ``0\n``. Otherwise, it emits an |
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273 # ``upgraded <token> <protocol>`` line to both stdout and stderr. |
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274 # Content immediately following this line describes additional |
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275 # protocol and server state. |
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276 # |
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277 # In addition to the responses to our command requests, the server |
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278 # may emit "banner" output on stdout. SSH servers are allowed to |
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279 # print messages to stdout on login. Issuing commands on connection |
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280 # allows us to flush this banner output from the server by scanning |
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281 # for output to our well-known ``between`` command. Of course, if |
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282 # the banner contains ``1\n\n``, this will throw off our detection. |
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283 |
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284 requestlog = ui.configbool(b'devel', b'debug.peer-request') |
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285 |
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286 # Generate a random token to help identify responses to version 2 |
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287 # upgrade request. |
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288 token = pycompat.sysbytes(str(uuid.uuid4())) |
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289 |
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290 try: |
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291 pairsarg = b'%s-%s' % (b'0' * 40, b'0' * 40) |
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292 handshake = [ |
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293 b'hello\n', |
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294 b'between\n', |
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295 b'pairs %d\n' % len(pairsarg), |
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296 pairsarg, |
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297 ] |
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298 |
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299 if requestlog: |
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300 ui.debug(b'devel-peer-request: hello+between\n') |
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301 ui.debug(b'devel-peer-request: pairs: %d bytes\n' % len(pairsarg)) |
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302 ui.debug(b'sending hello command\n') |
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303 ui.debug(b'sending between command\n') |
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304 |
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305 stdin.write(b''.join(handshake)) |
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306 stdin.flush() |
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307 except IOError: |
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308 badresponse() |
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309 |
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310 # Assume version 1 of wire protocol by default. |
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311 protoname = wireprototypes.SSHV1 |
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312 reupgraded = re.compile(b'^upgraded %s (.*)$' % stringutil.reescape(token)) |
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313 |
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314 lines = [b'', b'dummy'] |
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315 max_noise = 500 |
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316 while lines[-1] and max_noise: |
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317 try: |
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318 l = stdout.readline() |
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319 _forwardoutput(ui, stderr, warn=True) |
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320 |
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321 # Look for reply to protocol upgrade request. It has a token |
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322 # in it, so there should be no false positives. |
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323 m = reupgraded.match(l) |
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324 if m: |
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325 protoname = m.group(1) |
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326 ui.debug(b'protocol upgraded to %s\n' % protoname) |
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327 # If an upgrade was handled, the ``hello`` and ``between`` |
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328 # requests are ignored. The next output belongs to the |
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329 # protocol, so stop scanning lines. |
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330 break |
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331 |
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332 # Otherwise it could be a banner, ``0\n`` response if server |
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333 # doesn't support upgrade. |
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334 |
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335 if lines[-1] == b'1\n' and l == b'\n': |
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336 break |
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337 if l: |
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338 ui.debug(b'remote: ', l) |
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339 lines.append(l) |
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340 max_noise -= 1 |
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341 except IOError: |
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342 badresponse() |
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343 else: |
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344 badresponse() |
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345 |
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346 caps = set() |
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347 |
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348 # For version 1, we should see a ``capabilities`` line in response to the |
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349 # ``hello`` command. |
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350 if protoname == wireprototypes.SSHV1: |
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351 for l in reversed(lines): |
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352 # Look for response to ``hello`` command. Scan from the back so |
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353 # we don't misinterpret banner output as the command reply. |
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354 if l.startswith(b'capabilities:'): |
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355 caps.update(l[:-1].split(b':')[1].split()) |
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356 break |
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357 |
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358 # Error if we couldn't find capabilities, this means: |
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359 # |
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360 # 1. Remote isn't a Mercurial server |
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361 # 2. Remote is a <0.9.1 Mercurial server |
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362 # 3. Remote is a future Mercurial server that dropped ``hello`` |
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363 # and other attempted handshake mechanisms. |
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364 if not caps: |
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365 badresponse() |
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366 |
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367 # Flush any output on stderr before proceeding. |
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368 _forwardoutput(ui, stderr, warn=True) |
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369 |
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370 return protoname, caps |
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371 |
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372 |
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373 class sshv1peer(wireprotov1peer.wirepeer): |
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374 def __init__( |
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375 self, ui, url, proc, stdin, stdout, stderr, caps, autoreadstderr=True |
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376 ): |
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377 """Create a peer from an existing SSH connection. |
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378 |
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379 ``proc`` is a handle on the underlying SSH process. |
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380 ``stdin``, ``stdout``, and ``stderr`` are handles on the stdio |
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381 pipes for that process. |
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382 ``caps`` is a set of capabilities supported by the remote. |
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383 ``autoreadstderr`` denotes whether to automatically read from |
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384 stderr and to forward its output. |
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385 """ |
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386 self._url = url |
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387 self.ui = ui |
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388 # self._subprocess is unused. Keeping a handle on the process |
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389 # holds a reference and prevents it from being garbage collected. |
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390 self._subprocess = proc |
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391 |
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392 # And we hook up our "doublepipe" wrapper to allow querying |
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393 # stderr any time we perform I/O. |
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394 if autoreadstderr: |
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395 stdout = doublepipe(ui, util.bufferedinputpipe(stdout), stderr) |
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396 stdin = doublepipe(ui, stdin, stderr) |
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397 |
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398 self._pipeo = stdin |
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399 self._pipei = stdout |
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400 self._pipee = stderr |
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401 self._caps = caps |
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402 self._autoreadstderr = autoreadstderr |
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403 self._initstack = b''.join(util.getstackframes(1)) |
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404 |
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405 # Commands that have a "framed" response where the first line of the |
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406 # response contains the length of that response. |
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407 _FRAMED_COMMANDS = { |
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408 b'batch', |
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409 } |
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410 |
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411 # Begin of ipeerconnection interface. |
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412 |
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413 def url(self): |
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414 return self._url |
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415 |
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416 def local(self): |
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417 return None |
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418 |
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419 def peer(self): |
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420 return self |
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421 |
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422 def canpush(self): |
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423 return True |
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424 |
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425 def close(self): |
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426 self._cleanup() |
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427 |
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428 # End of ipeerconnection interface. |
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429 |
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430 # Begin of ipeercommands interface. |
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431 |
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432 def capabilities(self): |
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433 return self._caps |
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434 |
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435 # End of ipeercommands interface. |
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436 |
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437 def _readerr(self): |
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438 _forwardoutput(self.ui, self._pipee) |
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439 |
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440 def _abort(self, exception): |
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441 self._cleanup() |
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442 raise exception |
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443 |
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444 def _cleanup(self, warn=None): |
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445 _cleanuppipes(self.ui, self._pipei, self._pipeo, self._pipee, warn=warn) |
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446 |
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447 def __del__(self): |
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|
448 self._cleanup(warn=self._initstack) |
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449 |
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450 def _sendrequest(self, cmd, args, framed=False): |
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451 if self.ui.debugflag and self.ui.configbool( |
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|
452 b'devel', b'debug.peer-request' |
43076
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formatting: blacken the codebase
Augie Fackler <augie@google.com>
parents:
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diff
changeset
|
453 ): |
35699
f7ef49e44d7c
sshpeer: add support for request tracing
Boris Feld <boris.feld@octobus.net>
parents:
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diff
changeset
|
454 dbg = self.ui.debug |
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parents:
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diff
changeset
|
455 line = b'devel-peer-request: %s\n' |
35699
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sshpeer: add support for request tracing
Boris Feld <boris.feld@octobus.net>
parents:
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diff
changeset
|
456 dbg(line % cmd) |
f7ef49e44d7c
sshpeer: add support for request tracing
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parents:
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diff
changeset
|
457 for key, value in sorted(args.items()): |
f7ef49e44d7c
sshpeer: add support for request tracing
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parents:
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diff
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|
458 if not isinstance(value, dict): |
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parents:
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diff
changeset
|
459 dbg(line % b' %s: %d bytes' % (key, len(value))) |
35699
f7ef49e44d7c
sshpeer: add support for request tracing
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parents:
35459
diff
changeset
|
460 else: |
f7ef49e44d7c
sshpeer: add support for request tracing
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parents:
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diff
changeset
|
461 for dk, dv in sorted(value.items()): |
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parents:
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diff
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|
462 dbg(line % b' %s-%s: %d' % (key, dk, len(dv))) |
687b865b95ad
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parents:
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diff
changeset
|
463 self.ui.debug(b"sending %s command\n" % cmd) |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
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parents:
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diff
changeset
|
464 self._pipeo.write(b"%s\n" % cmd) |
37785
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wireproto: rename wireproto to wireprotov1server (API)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
37717
diff
changeset
|
465 _func, names = wireprotov1server.commands[cmd] |
13721
3458c15ab2f0
wireproto: fix handling of '*' args for HTTP and SSH
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
13464
diff
changeset
|
466 keys = names.split() |
3458c15ab2f0
wireproto: fix handling of '*' args for HTTP and SSH
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parents:
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diff
changeset
|
467 wireargs = {} |
3458c15ab2f0
wireproto: fix handling of '*' args for HTTP and SSH
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parents:
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diff
changeset
|
468 for k in keys: |
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parents:
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diff
changeset
|
469 if k == b'*': |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
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parents:
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diff
changeset
|
470 wireargs[b'*'] = args |
13721
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wireproto: fix handling of '*' args for HTTP and SSH
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parents:
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diff
changeset
|
471 break |
3458c15ab2f0
wireproto: fix handling of '*' args for HTTP and SSH
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
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diff
changeset
|
472 else: |
3458c15ab2f0
wireproto: fix handling of '*' args for HTTP and SSH
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
13464
diff
changeset
|
473 wireargs[k] = args[k] |
3458c15ab2f0
wireproto: fix handling of '*' args for HTTP and SSH
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parents:
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diff
changeset
|
474 del args[k] |
48913
f254fc73d956
global: bulk replace simple pycompat.iteritems(x) with x.items()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
475 for k, v in sorted(wireargs.items()): |
43077
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parents:
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diff
changeset
|
476 self._pipeo.write(b"%s %d\n" % (k, len(v))) |
13721
3458c15ab2f0
wireproto: fix handling of '*' args for HTTP and SSH
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
13464
diff
changeset
|
477 if isinstance(v, dict): |
48913
f254fc73d956
global: bulk replace simple pycompat.iteritems(x) with x.items()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
48875
diff
changeset
|
478 for dk, dv in v.items(): |
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parents:
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diff
changeset
|
479 self._pipeo.write(b"%s %d\n" % (dk, len(dv))) |
33768
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sshpeer: make instance attributes and methods internal
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parents:
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diff
changeset
|
480 self._pipeo.write(dv) |
13721
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wireproto: fix handling of '*' args for HTTP and SSH
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents:
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diff
changeset
|
481 else: |
33768
82d564d5ac4f
sshpeer: make instance attributes and methods internal
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
482 self._pipeo.write(v) |
82d564d5ac4f
sshpeer: make instance attributes and methods internal
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parents:
33737
diff
changeset
|
483 self._pipeo.flush() |
624
876333a295ff
Add an sshrepository class and hg serve --stdio
Matt Mackall <mpm@selenic.com>
parents:
623
diff
changeset
|
484 |
36367
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36366
diff
changeset
|
485 # We know exactly how many bytes are in the response. So return a proxy |
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36366
diff
changeset
|
486 # around the raw output stream that allows reading exactly this many |
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36366
diff
changeset
|
487 # bytes. Callers then can read() without fear of overrunning the |
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36366
diff
changeset
|
488 # response. |
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36366
diff
changeset
|
489 if framed: |
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36366
diff
changeset
|
490 amount = self._getamount() |
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36366
diff
changeset
|
491 return util.cappedreader(self._pipei, amount) |
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36366
diff
changeset
|
492 |
33768
82d564d5ac4f
sshpeer: make instance attributes and methods internal
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33737
diff
changeset
|
493 return self._pipei |
624
876333a295ff
Add an sshrepository class and hg serve --stdio
Matt Mackall <mpm@selenic.com>
parents:
623
diff
changeset
|
494 |
36366
a34d5ef53c2e
sshpeer: move logic for sending a request into a new function
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36363
diff
changeset
|
495 def _callstream(self, cmd, **args): |
a34d5ef53c2e
sshpeer: move logic for sending a request into a new function
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36363
diff
changeset
|
496 args = pycompat.byteskwargs(args) |
36367
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
497 return self._sendrequest(cmd, args, framed=cmd in self._FRAMED_COMMANDS) |
36366
a34d5ef53c2e
sshpeer: move logic for sending a request into a new function
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36363
diff
changeset
|
498 |
20905
167047ba3cfa
wireproto: drop the _decompress method in favor a new call type
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20794
diff
changeset
|
499 def _callcompressable(self, cmd, **args): |
36366
a34d5ef53c2e
sshpeer: move logic for sending a request into a new function
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36363
diff
changeset
|
500 args = pycompat.byteskwargs(args) |
36367
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
501 return self._sendrequest(cmd, args, framed=cmd in self._FRAMED_COMMANDS) |
20905
167047ba3cfa
wireproto: drop the _decompress method in favor a new call type
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20794
diff
changeset
|
502 |
11589
e8d22fe2ddab
protocol: clean up call-like functions in http and ssh clients
Matt Mackall <mpm@selenic.com>
parents:
11588
diff
changeset
|
503 def _call(self, cmd, **args): |
36366
a34d5ef53c2e
sshpeer: move logic for sending a request into a new function
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36363
diff
changeset
|
504 args = pycompat.byteskwargs(args) |
36367
043e77f3be09
sshpeer: return framed file object when needed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36366
diff
changeset
|
505 return self._sendrequest(cmd, args, framed=True).read() |
5978
7939c71f3132
sshrepo: be more careful while reading data
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
5293
diff
changeset
|
506 |
11592
26e0782b8380
protocol: unify client unbundle support
Matt Mackall <mpm@selenic.com>
parents:
11591
diff
changeset
|
507 def _callpush(self, cmd, fp, **args): |
36372
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
508 # The server responds with an empty frame if the client should |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
509 # continue submitting the payload. |
11592
26e0782b8380
protocol: unify client unbundle support
Matt Mackall <mpm@selenic.com>
parents:
11591
diff
changeset
|
510 r = self._call(cmd, **args) |
26e0782b8380
protocol: unify client unbundle support
Matt Mackall <mpm@selenic.com>
parents:
11591
diff
changeset
|
511 if r: |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
512 return b'', r |
36372
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
513 |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
514 # The payload consists of frames with content followed by an empty |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
515 # frame. |
43077
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formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
516 for d in iter(lambda: fp.read(4096), b''): |
36363
7f8f74531b0b
sshpeer: rename _recv and _send to _readframed and _writeframed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36216
diff
changeset
|
517 self._writeframed(d) |
43077
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formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
518 self._writeframed(b"", flush=True) |
36372
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
519 |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
520 # In case of success, there is an empty frame and a frame containing |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
521 # the integer result (as a string). |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
522 # In case of error, there is a non-empty frame containing the error. |
36363
7f8f74531b0b
sshpeer: rename _recv and _send to _readframed and _writeframed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36216
diff
changeset
|
523 r = self._readframed() |
11592
26e0782b8380
protocol: unify client unbundle support
Matt Mackall <mpm@selenic.com>
parents:
11591
diff
changeset
|
524 if r: |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
525 return b'', r |
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
526 return self._readframed(), b'' |
11592
26e0782b8380
protocol: unify client unbundle support
Matt Mackall <mpm@selenic.com>
parents:
11591
diff
changeset
|
527 |
21073
83ce71ef7804
sshpeer: add implementation of _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
528 def _calltwowaystream(self, cmd, fp, **args): |
36372
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
529 # The server responds with an empty frame if the client should |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
530 # continue submitting the payload. |
21073
83ce71ef7804
sshpeer: add implementation of _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
531 r = self._call(cmd, **args) |
83ce71ef7804
sshpeer: add implementation of _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
532 if r: |
83ce71ef7804
sshpeer: add implementation of _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
533 # XXX needs to be made better |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
534 raise error.Abort(_(b'unexpected remote reply: %s') % r) |
36372
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
535 |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
536 # The payload consists of frames with content followed by an empty |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
537 # frame. |
43077
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Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
538 for d in iter(lambda: fp.read(4096), b''): |
36363
7f8f74531b0b
sshpeer: rename _recv and _send to _readframed and _writeframed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36216
diff
changeset
|
539 self._writeframed(d) |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
540 self._writeframed(b"", flush=True) |
36372
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
541 |
33768
82d564d5ac4f
sshpeer: make instance attributes and methods internal
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33737
diff
changeset
|
542 return self._pipei |
11591
0d9cb3f3b0a1
protocol: unify client changegroup methods
Matt Mackall <mpm@selenic.com>
parents:
11590
diff
changeset
|
543 |
28438
48fd02dac1d4
wireproto: make iterbatcher behave streamily over http(s)
Augie Fackler <augie@google.com>
parents:
27798
diff
changeset
|
544 def _getamount(self): |
33768
82d564d5ac4f
sshpeer: make instance attributes and methods internal
Gregory Szorc <gregory.szorc@gmail.com>
parents:
33737
diff
changeset
|
545 l = self._pipei.readline() |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
546 if l == b'\n': |
36608
1151c731686e
sshpeer: don't read from stderr when that behavior is disabled
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36536
diff
changeset
|
547 if self._autoreadstderr: |
1151c731686e
sshpeer: don't read from stderr when that behavior is disabled
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36536
diff
changeset
|
548 self._readerr() |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
549 msg = _(b'check previous remote output') |
25243
d65243d28749
sshpeer: break "OutOfBandError" feature for ssh (BC)
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23684
diff
changeset
|
550 self._abort(error.OutOfBandError(hint=msg)) |
36608
1151c731686e
sshpeer: don't read from stderr when that behavior is disabled
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36536
diff
changeset
|
551 if self._autoreadstderr: |
1151c731686e
sshpeer: don't read from stderr when that behavior is disabled
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36536
diff
changeset
|
552 self._readerr() |
646
342927da4f4c
Show remote client output with "remote:"
Matt Mackall <mpm@selenic.com>
parents:
644
diff
changeset
|
553 try: |
28438
48fd02dac1d4
wireproto: make iterbatcher behave streamily over http(s)
Augie Fackler <augie@google.com>
parents:
27798
diff
changeset
|
554 return int(l) |
14004
97ed99d1f419
eliminate various naked except clauses
Idan Kamara <idankk86@gmail.com>
parents:
13827
diff
changeset
|
555 except ValueError: |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
parents:
43076
diff
changeset
|
556 self._abort(error.ResponseError(_(b"unexpected response:"), l)) |
28438
48fd02dac1d4
wireproto: make iterbatcher behave streamily over http(s)
Augie Fackler <augie@google.com>
parents:
27798
diff
changeset
|
557 |
36363
7f8f74531b0b
sshpeer: rename _recv and _send to _readframed and _writeframed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36216
diff
changeset
|
558 def _readframed(self): |
36628
70415568ea65
sshpeer: don't read(0)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36608
diff
changeset
|
559 size = self._getamount() |
70415568ea65
sshpeer: don't read(0)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36608
diff
changeset
|
560 if not size: |
70415568ea65
sshpeer: don't read(0)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36608
diff
changeset
|
561 return b'' |
70415568ea65
sshpeer: don't read(0)
Gregory Szorc <gregory.szorc@gmail.com>
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562 |
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563 return self._pipei.read(size) |
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564 |
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565 def _writeframed(self, data, flush=False): |
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566 self._pipeo.write(b"%d\n" % len(data)) |
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567 if data: |
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568 self._pipeo.write(data) |
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569 if flush: |
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570 self._pipeo.flush() |
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571 if self._autoreadstderr: |
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572 self._readerr() |
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573 |
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574 |
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575 def makepeer(ui, path, proc, stdin, stdout, stderr, autoreadstderr=True): |
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576 """Make a peer instance from existing pipes. |
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577 |
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578 ``path`` and ``proc`` are stored on the eventual peer instance and may |
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579 not be used for anything meaningful. |
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580 |
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581 ``stdin``, ``stdout``, and ``stderr`` are the pipes connected to the |
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582 SSH server's stdio handles. |
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583 |
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584 This function is factored out to allow creating peers that don't |
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585 actually spawn a new process. It is useful for starting SSH protocol |
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586 servers and clients via non-standard means, which can be useful for |
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587 testing. |
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588 """ |
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589 try: |
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590 protoname, caps = _performhandshake(ui, stdin, stdout, stderr) |
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591 except Exception: |
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592 _cleanuppipes(ui, stdout, stdin, stderr, warn=None) |
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593 raise |
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594 |
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595 if protoname == wireprototypes.SSHV1: |
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596 return sshv1peer( |
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597 ui, |
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598 path, |
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599 proc, |
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600 stdin, |
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601 stdout, |
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602 stderr, |
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603 caps, |
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604 autoreadstderr=autoreadstderr, |
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605 ) |
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606 else: |
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607 _cleanuppipes(ui, stdout, stdin, stderr, warn=None) |
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608 raise error.RepoError( |
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609 _(b'unknown version of SSH protocol: %s') % protoname |
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610 ) |
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611 |
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612 |
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613 def instance(ui, path, create, intents=None, createopts=None): |
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614 """Create an SSH peer. |
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615 |
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616 The returned object conforms to the ``wireprotov1peer.wirepeer`` interface. |
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617 """ |
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618 u = urlutil.url(path, parsequery=False, parsefragment=False) |
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619 if u.scheme != b'ssh' or not u.host or u.path is None: |
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620 raise error.RepoError(_(b"couldn't parse location %s") % path) |
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621 |
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622 urlutil.checksafessh(path) |
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623 |
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624 if u.passwd is not None: |
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625 raise error.RepoError(_(b'password in URL not supported')) |
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626 |
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627 sshcmd = ui.config(b'ui', b'ssh') |
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628 remotecmd = ui.config(b'ui', b'remotecmd') |
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629 sshaddenv = dict(ui.configitems(b'sshenv')) |
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630 sshenv = procutil.shellenviron(sshaddenv) |
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631 remotepath = u.path or b'.' |
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632 |
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633 args = procutil.sshargs(sshcmd, u.host, u.user, u.port) |
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634 |
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635 if create: |
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636 # We /could/ do this, but only if the remote init command knows how to |
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637 # handle them. We don't yet make any assumptions about that. And without |
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638 # querying the remote, there's no way of knowing if the remote even |
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639 # supports said requested feature. |
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640 if createopts: |
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641 raise error.RepoError( |
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642 _( |
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643 b'cannot create remote SSH repositories ' |
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644 b'with extra options' |
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645 ) |
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646 ) |
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647 |
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648 cmd = b'%s %s %s' % ( |
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649 sshcmd, |
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650 args, |
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651 procutil.shellquote( |
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652 b'%s init %s' |
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653 % (_serverquote(remotecmd), _serverquote(remotepath)) |
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654 ), |
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655 ) |
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656 ui.debug(b'running %s\n' % cmd) |
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657 res = ui.system(cmd, blockedtag=b'sshpeer', environ=sshenv) |
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658 if res != 0: |
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659 raise error.RepoError(_(b'could not create remote repo')) |
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660 |
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661 proc, stdin, stdout, stderr = _makeconnection( |
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662 ui, sshcmd, args, remotecmd, remotepath, sshenv |
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663 ) |
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664 |
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665 peer = makepeer(ui, path, proc, stdin, stdout, stderr) |
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666 |
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667 # Finally, if supported by the server, notify it about our own |
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668 # capabilities. |
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669 if b'protocaps' in peer.capabilities(): |
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670 try: |
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671 peer._call( |
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672 b"protocaps", caps=b' '.join(sorted(_clientcapabilities())) |
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673 ) |
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674 except IOError: |
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675 peer._cleanup() |
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diff
changeset
|
676 raise error.RepoError(_(b'capability exchange failed')) |
37393
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
37321
diff
changeset
|
677 |
afcfdf53e4b5
wireproto: provide accessors for client capabilities
Joerg Sonnenberger <joerg@bec.de>
parents:
37321
diff
changeset
|
678 return peer |