Mercurial > hg
annotate mercurial/sshpeer.py @ 38713:27391d74aaa2
ssh: avoid reading beyond the end of stream when using compression
Compressed streams can be used as part of getbundle. The normal read()
operation of bufferedinputpipe will try to fulfill the request exactly
and can deadlock if the server sends less as it is done. At the same
time, the bundle2 logic will stop reading when it believes it has gotten
all parts of the bundle, which can leave behind end of stream markers as
used by bzip2 and zstd.
To solve this, introduce a new optional unbufferedread interface and
provided it in bufferedinputpipe and doublepipe. If there is buffered
data left, it will be returned, otherwise it will issue a single read
request and return whatever it obtains.
Reorganize the decompression handlers to try harder to read until the
end of stream, especially if the requested read can already be
fulfilled. Check for end of stream is messy with Python 2, none of the
standard compression modules properly exposes it. At least with zstd and
bzip2, decompressing will remember EOS and fail for empty input after
the EOS has been seen. For zlib, the only way to detect it with Python 2
is to duplicate the decompressobj and force some additional data into
it. The common handler can be further optimized, but works as PoC.
Differential Revision: https://phab.mercurial-scm.org/D3937
author | Joerg Sonnenberger <joerg@bec.de> |
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date | Thu, 12 Jul 2018 18:46:10 +0200 |
parents | 67dc32d4e790 |
children | 089fc0db0954 |
rev | line source |
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1 # sshpeer.py - ssh repository proxy class for mercurial |
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2 # |
2859 | 3 # Copyright 2005, 2006 Matt Mackall <mpm@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 from __future__ import absolute_import |
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9 |
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10 import re |
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11 import uuid |
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12 |
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13 from .i18n import _ |
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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 wireprotoserver, |
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19 wireprototypes, |
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20 wireprotov1peer, |
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21 wireprotov1server, |
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22 ) |
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23 from .utils import ( |
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24 procutil, |
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25 stringutil, |
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26 ) |
60 | 27 |
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28 def _serverquote(s): |
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29 """quote a string for the remote shell ... which we assume is sh""" |
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30 if not s: |
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31 return s |
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32 if re.match('[a-zA-Z0-9@%_+=:,./-]*$', s): |
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33 return s |
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34 return "'%s'" % s.replace("'", "'\\''") |
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35 |
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36 def _forwardoutput(ui, pipe): |
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37 """display all data currently available on pipe as remote output. |
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38 |
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39 This is non blocking.""" |
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40 if pipe: |
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41 s = procutil.readpipe(pipe) |
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42 if s: |
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43 for l in s.splitlines(): |
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44 ui.status(_("remote: "), l, '\n') |
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45 |
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46 class doublepipe(object): |
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47 """Operate a side-channel pipe in addition of a main one |
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48 |
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49 The side-channel pipe contains server output to be forwarded to the user |
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50 input. The double pipe will behave as the "main" pipe, but will ensure the |
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51 content of the "side" pipe is properly processed while we wait for blocking |
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52 call on the "main" pipe. |
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53 |
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54 If large amounts of data are read from "main", the forward will cease after |
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55 the first bytes start to appear. This simplifies the implementation |
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56 without affecting actual output of sshpeer too much as we rarely issue |
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57 large read for data not yet emitted by the server. |
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58 |
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59 The main pipe is expected to be a 'bufferedinputpipe' from the util module |
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60 that handle all the os specific bits. This class lives in this module |
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61 because it focus on behavior specific to the ssh protocol.""" |
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62 |
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63 def __init__(self, ui, main, side): |
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64 self._ui = ui |
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65 self._main = main |
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66 self._side = side |
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67 |
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68 def _wait(self): |
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69 """wait until some data are available on main or side |
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70 |
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71 return a pair of boolean (ismainready, issideready) |
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72 |
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73 (This will only wait for data if the setup is supported by `util.poll`) |
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74 """ |
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75 if (isinstance(self._main, util.bufferedinputpipe) and |
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76 self._main.hasbuffer): |
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77 # Main has data. Assume side is worth poking at. |
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78 return True, True |
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79 |
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80 fds = [self._main.fileno(), self._side.fileno()] |
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81 try: |
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82 act = util.poll(fds) |
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83 except NotImplementedError: |
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84 # non supported yet case, assume all have data. |
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85 act = fds |
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86 return (self._main.fileno() in act, self._side.fileno() in act) |
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87 |
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88 def write(self, data): |
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89 return self._call('write', data) |
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90 |
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91 def read(self, size): |
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92 r = self._call('read', size) |
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93 if size != 0 and not r: |
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94 # We've observed a condition that indicates the |
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95 # stdout closed unexpectedly. Check stderr one |
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96 # more time and snag anything that's there before |
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97 # letting anyone know the main part of the pipe |
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98 # closed prematurely. |
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99 _forwardoutput(self._ui, self._side) |
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100 return r |
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101 |
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102 def unbufferedread(self, size): |
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103 r = self._call('unbufferedread', size) |
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104 if size != 0 and not r: |
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105 # We've observed a condition that indicates the |
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106 # stdout closed unexpectedly. Check stderr one |
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107 # more time and snag anything that's there before |
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108 # letting anyone know the main part of the pipe |
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109 # closed prematurely. |
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110 _forwardoutput(self._ui, self._side) |
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111 return r |
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112 |
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113 def readline(self): |
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114 return self._call('readline') |
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115 |
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116 def _call(self, methname, data=None): |
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117 """call <methname> on "main", forward output of "side" while blocking |
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118 """ |
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119 # data can be '' or 0 |
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120 if (data is not None and not data) or self._main.closed: |
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121 _forwardoutput(self._ui, self._side) |
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122 return '' |
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123 while True: |
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124 mainready, sideready = self._wait() |
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125 if sideready: |
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126 _forwardoutput(self._ui, self._side) |
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127 if mainready: |
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128 meth = getattr(self._main, methname) |
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129 if data is None: |
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130 return meth() |
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131 else: |
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132 return meth(data) |
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133 |
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134 def close(self): |
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135 return self._main.close() |
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136 |
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137 def flush(self): |
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138 return self._main.flush() |
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139 |
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140 def _cleanuppipes(ui, pipei, pipeo, pipee): |
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141 """Clean up pipes used by an SSH connection.""" |
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142 if pipeo: |
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143 pipeo.close() |
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144 if pipei: |
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145 pipei.close() |
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146 |
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147 if pipee: |
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148 # Try to read from the err descriptor until EOF. |
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149 try: |
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150 for l in pipee: |
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151 ui.status(_('remote: '), l) |
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152 except (IOError, ValueError): |
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153 pass |
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154 |
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155 pipee.close() |
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156 |
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157 def _makeconnection(ui, sshcmd, args, remotecmd, path, sshenv=None): |
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158 """Create an SSH connection to a server. |
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159 |
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160 Returns a tuple of (process, stdin, stdout, stderr) for the |
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161 spawned process. |
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162 """ |
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163 cmd = '%s %s %s' % ( |
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164 sshcmd, |
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165 args, |
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166 procutil.shellquote('%s -R %s serve --stdio' % ( |
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167 _serverquote(remotecmd), _serverquote(path)))) |
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168 |
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169 ui.debug('running %s\n' % cmd) |
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170 cmd = procutil.quotecommand(cmd) |
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171 |
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172 # no buffer allow the use of 'select' |
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173 # feel free to remove buffering and select usage when we ultimately |
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174 # move to threading. |
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175 stdin, stdout, stderr, proc = procutil.popen4(cmd, bufsize=0, env=sshenv) |
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176 |
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177 return proc, stdin, stdout, stderr |
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178 |
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179 def _clientcapabilities(): |
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180 """Return list of capabilities of this client. |
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181 |
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182 Returns a list of capabilities that are supported by this client. |
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183 """ |
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184 protoparams = {'partial-pull'} |
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185 comps = [e.wireprotosupport().name for e in |
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186 util.compengines.supportedwireengines(util.CLIENTROLE)] |
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187 protoparams.add('comp=%s' % ','.join(comps)) |
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188 return protoparams |
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189 |
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190 def _performhandshake(ui, stdin, stdout, stderr): |
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191 def badresponse(): |
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192 # Flush any output on stderr. |
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193 _forwardoutput(ui, stderr) |
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194 |
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195 msg = _('no suitable response from remote hg') |
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196 hint = ui.config('ui', 'ssherrorhint') |
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197 raise error.RepoError(msg, hint=hint) |
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198 |
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199 # The handshake consists of sending wire protocol commands in reverse |
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200 # order of protocol implementation and then sniffing for a response |
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201 # to one of them. |
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202 # |
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203 # Those commands (from oldest to newest) are: |
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204 # |
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205 # ``between`` |
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206 # Asks for the set of revisions between a pair of revisions. Command |
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207 # present in all Mercurial server implementations. |
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208 # |
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209 # ``hello`` |
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210 # Instructs the server to advertise its capabilities. Introduced in |
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211 # Mercurial 0.9.1. |
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212 # |
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213 # ``upgrade`` |
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214 # Requests upgrade from default transport protocol version 1 to |
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215 # a newer version. Introduced in Mercurial 4.6 as an experimental |
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216 # feature. |
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217 # |
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218 # The ``between`` command is issued with a request for the null |
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219 # range. If the remote is a Mercurial server, this request will |
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220 # generate a specific response: ``1\n\n``. This represents the |
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221 # wire protocol encoded value for ``\n``. We look for ``1\n\n`` |
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222 # in the output stream and know this is the response to ``between`` |
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223 # and we're at the end of our handshake reply. |
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224 # |
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225 # The response to the ``hello`` command will be a line with the |
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226 # length of the value returned by that command followed by that |
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227 # value. If the server doesn't support ``hello`` (which should be |
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228 # rare), that line will be ``0\n``. Otherwise, the value will contain |
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229 # RFC 822 like lines. Of these, the ``capabilities:`` line contains |
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230 # the capabilities of the server. |
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231 # |
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232 # The ``upgrade`` command isn't really a command in the traditional |
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233 # sense of version 1 of the transport because it isn't using the |
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234 # proper mechanism for formatting insteads: instead, it just encodes |
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235 # arguments on the line, delimited by spaces. |
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236 # |
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237 # The ``upgrade`` line looks like ``upgrade <token> <capabilities>``. |
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238 # If the server doesn't support protocol upgrades, it will reply to |
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239 # this line with ``0\n``. Otherwise, it emits an |
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240 # ``upgraded <token> <protocol>`` line to both stdout and stderr. |
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241 # Content immediately following this line describes additional |
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242 # protocol and server state. |
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243 # |
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244 # In addition to the responses to our command requests, the server |
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245 # may emit "banner" output on stdout. SSH servers are allowed to |
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246 # print messages to stdout on login. Issuing commands on connection |
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247 # allows us to flush this banner output from the server by scanning |
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248 # for output to our well-known ``between`` command. Of course, if |
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249 # the banner contains ``1\n\n``, this will throw off our detection. |
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250 |
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251 requestlog = ui.configbool('devel', 'debug.peer-request') |
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252 |
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253 # Generate a random token to help identify responses to version 2 |
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254 # upgrade request. |
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255 token = pycompat.sysbytes(str(uuid.uuid4())) |
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256 upgradecaps = [ |
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257 ('proto', wireprotoserver.SSHV2), |
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258 ] |
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259 upgradecaps = util.urlreq.urlencode(upgradecaps) |
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260 |
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261 try: |
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262 pairsarg = '%s-%s' % ('0' * 40, '0' * 40) |
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263 handshake = [ |
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264 'hello\n', |
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265 'between\n', |
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266 'pairs %d\n' % len(pairsarg), |
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267 pairsarg, |
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268 ] |
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269 |
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270 # Request upgrade to version 2 if configured. |
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271 if ui.configbool('experimental', 'sshpeer.advertise-v2'): |
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272 ui.debug('sending upgrade request: %s %s\n' % (token, upgradecaps)) |
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273 handshake.insert(0, 'upgrade %s %s\n' % (token, upgradecaps)) |
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274 |
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275 if requestlog: |
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276 ui.debug('devel-peer-request: hello+between\n') |
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277 ui.debug('devel-peer-request: pairs: %d bytes\n' % len(pairsarg)) |
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278 ui.debug('sending hello command\n') |
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279 ui.debug('sending between command\n') |
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280 |
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281 stdin.write(''.join(handshake)) |
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282 stdin.flush() |
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283 except IOError: |
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284 badresponse() |
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285 |
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286 # Assume version 1 of wire protocol by default. |
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287 protoname = wireprototypes.SSHV1 |
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288 reupgraded = re.compile(b'^upgraded %s (.*)$' % stringutil.reescape(token)) |
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289 |
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290 lines = ['', 'dummy'] |
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291 max_noise = 500 |
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292 while lines[-1] and max_noise: |
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293 try: |
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294 l = stdout.readline() |
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295 _forwardoutput(ui, stderr) |
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296 |
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297 # Look for reply to protocol upgrade request. It has a token |
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298 # in it, so there should be no false positives. |
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299 m = reupgraded.match(l) |
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300 if m: |
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301 protoname = m.group(1) |
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302 ui.debug('protocol upgraded to %s\n' % protoname) |
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303 # If an upgrade was handled, the ``hello`` and ``between`` |
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304 # requests are ignored. The next output belongs to the |
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305 # protocol, so stop scanning lines. |
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306 break |
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307 |
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308 # Otherwise it could be a banner, ``0\n`` response if server |
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309 # doesn't support upgrade. |
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310 |
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311 if lines[-1] == '1\n' and l == '\n': |
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312 break |
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313 if l: |
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314 ui.debug('remote: ', l) |
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315 lines.append(l) |
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316 max_noise -= 1 |
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317 except IOError: |
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318 badresponse() |
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319 else: |
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320 badresponse() |
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321 |
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322 caps = set() |
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323 |
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324 # For version 1, we should see a ``capabilities`` line in response to the |
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325 # ``hello`` command. |
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326 if protoname == wireprototypes.SSHV1: |
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327 for l in reversed(lines): |
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328 # Look for response to ``hello`` command. Scan from the back so |
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329 # we don't misinterpret banner output as the command reply. |
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330 if l.startswith('capabilities:'): |
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331 caps.update(l[:-1].split(':')[1].split()) |
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332 break |
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333 elif protoname == wireprotoserver.SSHV2: |
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334 # We see a line with number of bytes to follow and then a value |
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335 # looking like ``capabilities: *``. |
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336 line = stdout.readline() |
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337 try: |
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338 valuelen = int(line) |
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339 except ValueError: |
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340 badresponse() |
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341 |
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342 capsline = stdout.read(valuelen) |
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343 if not capsline.startswith('capabilities: '): |
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344 badresponse() |
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345 |
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346 ui.debug('remote: %s\n' % capsline) |
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347 |
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348 caps.update(capsline.split(':')[1].split()) |
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349 # Trailing newline. |
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350 stdout.read(1) |
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351 |
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352 # Error if we couldn't find capabilities, this means: |
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353 # |
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354 # 1. Remote isn't a Mercurial server |
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355 # 2. Remote is a <0.9.1 Mercurial server |
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356 # 3. Remote is a future Mercurial server that dropped ``hello`` |
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357 # and other attempted handshake mechanisms. |
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358 if not caps: |
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359 badresponse() |
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360 |
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361 # Flush any output on stderr before proceeding. |
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362 _forwardoutput(ui, stderr) |
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363 |
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364 return protoname, caps |
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365 |
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366 class sshv1peer(wireprotov1peer.wirepeer): |
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367 def __init__(self, ui, url, proc, stdin, stdout, stderr, caps, |
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368 autoreadstderr=True): |
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369 """Create a peer from an existing SSH connection. |
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370 |
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371 ``proc`` is a handle on the underlying SSH process. |
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372 ``stdin``, ``stdout``, and ``stderr`` are handles on the stdio |
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373 pipes for that process. |
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374 ``caps`` is a set of capabilities supported by the remote. |
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375 ``autoreadstderr`` denotes whether to automatically read from |
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376 stderr and to forward its output. |
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377 """ |
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378 self._url = url |
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379 self.ui = ui |
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380 # self._subprocess is unused. Keeping a handle on the process |
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381 # holds a reference and prevents it from being garbage collected. |
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382 self._subprocess = proc |
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383 |
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384 # And we hook up our "doublepipe" wrapper to allow querying |
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385 # stderr any time we perform I/O. |
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386 if autoreadstderr: |
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387 stdout = doublepipe(ui, util.bufferedinputpipe(stdout), stderr) |
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388 stdin = doublepipe(ui, stdin, stderr) |
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389 |
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390 self._pipeo = stdin |
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391 self._pipei = stdout |
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392 self._pipee = stderr |
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393 self._caps = caps |
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394 self._autoreadstderr = autoreadstderr |
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395 |
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396 # Commands that have a "framed" response where the first line of the |
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397 # response contains the length of that response. |
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398 _FRAMED_COMMANDS = { |
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399 'batch', |
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400 } |
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401 |
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402 # Begin of ipeerconnection interface. |
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403 |
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404 def url(self): |
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405 return self._url |
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406 |
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407 def local(self): |
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408 return None |
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409 |
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410 def peer(self): |
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411 return self |
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412 |
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413 def canpush(self): |
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414 return True |
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415 |
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416 def close(self): |
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417 pass |
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418 |
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419 # End of ipeerconnection interface. |
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420 |
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421 # Begin of ipeercommands interface. |
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422 |
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423 def capabilities(self): |
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424 return self._caps |
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425 |
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426 # End of ipeercommands interface. |
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427 |
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428 def _readerr(self): |
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429 _forwardoutput(self.ui, self._pipee) |
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430 |
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431 def _abort(self, exception): |
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432 self._cleanup() |
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433 raise exception |
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434 |
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|
435 def _cleanup(self): |
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|
436 _cleanuppipes(self.ui, self._pipei, self._pipeo, self._pipee) |
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437 |
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|
438 __del__ = _cleanup |
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439 |
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|
440 def _sendrequest(self, cmd, args, framed=False): |
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441 if (self.ui.debugflag |
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442 and self.ui.configbool('devel', 'debug.peer-request')): |
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443 dbg = self.ui.debug |
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444 line = 'devel-peer-request: %s\n' |
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445 dbg(line % cmd) |
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|
446 for key, value in sorted(args.items()): |
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|
447 if not isinstance(value, dict): |
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448 dbg(line % ' %s: %d bytes' % (key, len(value))) |
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449 else: |
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450 for dk, dv in sorted(value.items()): |
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|
451 dbg(line % ' %s-%s: %d' % (key, dk, len(dv))) |
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do not attempt to translate ui.debug output
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452 self.ui.debug("sending %s command\n" % cmd) |
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453 self._pipeo.write("%s\n" % cmd) |
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|
454 _func, names = wireprotov1server.commands[cmd] |
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|
455 keys = names.split() |
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|
456 wireargs = {} |
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|
457 for k in keys: |
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|
458 if k == '*': |
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|
459 wireargs['*'] = args |
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diff
changeset
|
460 break |
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|
461 else: |
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|
462 wireargs[k] = args[k] |
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|
463 del args[k] |
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|
464 for k, v in sorted(wireargs.iteritems()): |
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|
465 self._pipeo.write("%s %d\n" % (k, len(v))) |
13721
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|
466 if isinstance(v, dict): |
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diff
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|
467 for dk, dv in v.iteritems(): |
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|
468 self._pipeo.write("%s %d\n" % (dk, len(dv))) |
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|
469 self._pipeo.write(dv) |
13721
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|
470 else: |
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|
471 self._pipeo.write(v) |
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|
472 self._pipeo.flush() |
624
876333a295ff
Add an sshrepository class and hg serve --stdio
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|
473 |
36367
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|
474 # We know exactly how many bytes are in the response. So return a proxy |
043e77f3be09
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diff
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|
475 # around the raw output stream that allows reading exactly this many |
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|
476 # bytes. Callers then can read() without fear of overrunning the |
043e77f3be09
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parents:
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|
477 # response. |
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parents:
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|
478 if framed: |
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parents:
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|
479 amount = self._getamount() |
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|
480 return util.cappedreader(self._pipei, amount) |
043e77f3be09
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parents:
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diff
changeset
|
481 |
33768
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|
482 return self._pipei |
624
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Add an sshrepository class and hg serve --stdio
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parents:
623
diff
changeset
|
483 |
36366
a34d5ef53c2e
sshpeer: move logic for sending a request into a new function
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
484 def _callstream(self, cmd, **args): |
a34d5ef53c2e
sshpeer: move logic for sending a request into a new function
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parents:
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diff
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|
485 args = pycompat.byteskwargs(args) |
36367
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sshpeer: return framed file object when needed
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parents:
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diff
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|
486 return self._sendrequest(cmd, args, framed=cmd in self._FRAMED_COMMANDS) |
36366
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parents:
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diff
changeset
|
487 |
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
|
488 def _callcompressable(self, cmd, **args): |
36366
a34d5ef53c2e
sshpeer: move logic for sending a request into a new function
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parents:
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diff
changeset
|
489 args = pycompat.byteskwargs(args) |
36367
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parents:
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diff
changeset
|
490 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
|
491 |
11589
e8d22fe2ddab
protocol: clean up call-like functions in http and ssh clients
Matt Mackall <mpm@selenic.com>
parents:
11588
diff
changeset
|
492 def _call(self, cmd, **args): |
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parents:
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|
493 args = pycompat.byteskwargs(args) |
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
494 return self._sendrequest(cmd, args, framed=True).read() |
5978
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
5293
diff
changeset
|
495 |
11592
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protocol: unify client unbundle support
Matt Mackall <mpm@selenic.com>
parents:
11591
diff
changeset
|
496 def _callpush(self, cmd, fp, **args): |
36372
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parents:
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|
497 # The server responds with an empty frame if the client should |
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|
498 # continue submitting the payload. |
11592
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parents:
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diff
changeset
|
499 r = self._call(cmd, **args) |
26e0782b8380
protocol: unify client unbundle support
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parents:
11591
diff
changeset
|
500 if r: |
26e0782b8380
protocol: unify client unbundle support
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parents:
11591
diff
changeset
|
501 return '', r |
36372
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
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parents:
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diff
changeset
|
502 |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
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parents:
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diff
changeset
|
503 # The payload consists of frames with content followed by an empty |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
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parents:
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diff
changeset
|
504 # frame. |
29727
0dbd788a2dfd
sshpeer: use `iter(callable, sentinel)` instead of while True
Augie Fackler <augie@google.com>
parents:
29389
diff
changeset
|
505 for d in iter(lambda: fp.read(4096), ''): |
36363
7f8f74531b0b
sshpeer: rename _recv and _send to _readframed and _writeframed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36216
diff
changeset
|
506 self._writeframed(d) |
7f8f74531b0b
sshpeer: rename _recv and _send to _readframed and _writeframed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36216
diff
changeset
|
507 self._writeframed("", flush=True) |
36372
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parents:
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diff
changeset
|
508 |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
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parents:
36370
diff
changeset
|
509 # In case of success, there is an empty frame and a frame containing |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
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parents:
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diff
changeset
|
510 # the integer result (as a string). |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
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parents:
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diff
changeset
|
511 # 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
|
512 r = self._readframed() |
11592
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protocol: unify client unbundle support
Matt Mackall <mpm@selenic.com>
parents:
11591
diff
changeset
|
513 if r: |
26e0782b8380
protocol: unify client unbundle support
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parents:
11591
diff
changeset
|
514 return '', r |
36363
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
515 return self._readframed(), '' |
11592
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parents:
11591
diff
changeset
|
516 |
21073
83ce71ef7804
sshpeer: add implementation of _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
517 def _calltwowaystream(self, cmd, fp, **args): |
36372
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parents:
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diff
changeset
|
518 # The server responds with an empty frame if the client should |
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wireproto: document the wonky push protocol for SSH
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diff
changeset
|
519 # continue submitting the payload. |
21073
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sshpeer: add implementation of _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
520 r = self._call(cmd, **args) |
83ce71ef7804
sshpeer: add implementation of _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
521 if r: |
83ce71ef7804
sshpeer: add implementation of _calltwowaystream
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20905
diff
changeset
|
522 # XXX needs to be made better |
29389
98e8313dcd9e
i18n: translate abort messages
liscju <piotr.listkiewicz@gmail.com>
parents:
28438
diff
changeset
|
523 raise error.Abort(_('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
|
524 |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36370
diff
changeset
|
525 # The payload consists of frames with content followed by an empty |
b8d0761a85c7
wireproto: document the wonky push protocol for SSH
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parents:
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diff
changeset
|
526 # frame. |
29727
0dbd788a2dfd
sshpeer: use `iter(callable, sentinel)` instead of while True
Augie Fackler <augie@google.com>
parents:
29389
diff
changeset
|
527 for d in iter(lambda: fp.read(4096), ''): |
36363
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sshpeer: rename _recv and _send to _readframed and _writeframed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36216
diff
changeset
|
528 self._writeframed(d) |
7f8f74531b0b
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
36216
diff
changeset
|
529 self._writeframed("", flush=True) |
36372
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parents:
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diff
changeset
|
530 |
33768
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Gregory Szorc <gregory.szorc@gmail.com>
parents:
33737
diff
changeset
|
531 return self._pipei |
11591
0d9cb3f3b0a1
protocol: unify client changegroup methods
Matt Mackall <mpm@selenic.com>
parents:
11590
diff
changeset
|
532 |
28438
48fd02dac1d4
wireproto: make iterbatcher behave streamily over http(s)
Augie Fackler <augie@google.com>
parents:
27798
diff
changeset
|
533 def _getamount(self): |
33768
82d564d5ac4f
sshpeer: make instance attributes and methods internal
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parents:
33737
diff
changeset
|
534 l = self._pipei.readline() |
15017
f4522df38c65
wireproto: add out-of-band error class to allow remote repo to report errors
Andrew Pritchard <andrewp@fogcreek.com>
parents:
14537
diff
changeset
|
535 if l == '\n': |
36608
1151c731686e
sshpeer: don't read from stderr when that behavior is disabled
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36536
diff
changeset
|
536 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
|
537 self._readerr() |
25243
d65243d28749
sshpeer: break "OutOfBandError" feature for ssh (BC)
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23684
diff
changeset
|
538 msg = _('check previous remote output') |
d65243d28749
sshpeer: break "OutOfBandError" feature for ssh (BC)
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
23684
diff
changeset
|
539 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:
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diff
changeset
|
540 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
|
541 self._readerr() |
646
342927da4f4c
Show remote client output with "remote:"
Matt Mackall <mpm@selenic.com>
parents:
644
diff
changeset
|
542 try: |
28438
48fd02dac1d4
wireproto: make iterbatcher behave streamily over http(s)
Augie Fackler <augie@google.com>
parents:
27798
diff
changeset
|
543 return int(l) |
14004
97ed99d1f419
eliminate various naked except clauses
Idan Kamara <idankk86@gmail.com>
parents:
13827
diff
changeset
|
544 except ValueError: |
11590
0b15aee0a306
protocol: convert some ssh abort calls
Matt Mackall <mpm@selenic.com>
parents:
11589
diff
changeset
|
545 self._abort(error.ResponseError(_("unexpected response:"), l)) |
28438
48fd02dac1d4
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Augie Fackler <augie@google.com>
parents:
27798
diff
changeset
|
546 |
36363
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sshpeer: rename _recv and _send to _readframed and _writeframed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
547 def _readframed(self): |
36628
70415568ea65
sshpeer: don't read(0)
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parents:
36608
diff
changeset
|
548 size = self._getamount() |
70415568ea65
sshpeer: don't read(0)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
549 if not size: |
70415568ea65
sshpeer: don't read(0)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36608
diff
changeset
|
550 return b'' |
70415568ea65
sshpeer: don't read(0)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36608
diff
changeset
|
551 |
70415568ea65
sshpeer: don't read(0)
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36608
diff
changeset
|
552 return self._pipei.read(size) |
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Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
5293
diff
changeset
|
553 |
36363
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sshpeer: rename _recv and _send to _readframed and _writeframed
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
554 def _writeframed(self, data, flush=False): |
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parents:
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diff
changeset
|
555 self._pipeo.write("%d\n" % len(data)) |
5978
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sshrepo: be more careful while reading data
Alexis S. L. Carvalho <alexis@cecm.usp.br>
parents:
5293
diff
changeset
|
556 if data: |
33768
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diff
changeset
|
557 self._pipeo.write(data) |
5978
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diff
changeset
|
558 if flush: |
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diff
changeset
|
559 self._pipeo.flush() |
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parents:
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diff
changeset
|
560 if self._autoreadstderr: |
1151c731686e
sshpeer: don't read from stderr when that behavior is disabled
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
561 self._readerr() |
2612
ffb895f16925
add support for streaming clone.
Vadim Gelfer <vadim.gelfer@gmail.com>
parents:
2549
diff
changeset
|
562 |
35978
59e4a7781a36
sshpeer: implement peer for version 2 of wire protocol
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35977
diff
changeset
|
563 class sshv2peer(sshv1peer): |
59e4a7781a36
sshpeer: implement peer for version 2 of wire protocol
Gregory Szorc <gregory.szorc@gmail.com>
parents:
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diff
changeset
|
564 """A peer that speakers version 2 of the transport protocol.""" |
59e4a7781a36
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parents:
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diff
changeset
|
565 # Currently version 2 is identical to version 1 post handshake. |
59e4a7781a36
sshpeer: implement peer for version 2 of wire protocol
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parents:
35977
diff
changeset
|
566 # And handshake is performed before the peer is instantiated. So |
59e4a7781a36
sshpeer: implement peer for version 2 of wire protocol
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parents:
35977
diff
changeset
|
567 # we need no custom code. |
59e4a7781a36
sshpeer: implement peer for version 2 of wire protocol
Gregory Szorc <gregory.szorc@gmail.com>
parents:
35977
diff
changeset
|
568 |
36533
1a36ef7df70a
sshpeer: support not reading and forwarding stderr
Gregory Szorc <gregory.szorc@gmail.com>
parents:
36487
diff
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569 def makepeer(ui, path, proc, stdin, stdout, stderr, autoreadstderr=True): |
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570 """Make a peer instance from existing pipes. |
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571 |
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572 ``path`` and ``proc`` are stored on the eventual peer instance and may |
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573 not be used for anything meaningful. |
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574 |
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575 ``stdin``, ``stdout``, and ``stderr`` are the pipes connected to the |
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576 SSH server's stdio handles. |
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577 |
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578 This function is factored out to allow creating peers that don't |
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579 actually spawn a new process. It is useful for starting SSH protocol |
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580 servers and clients via non-standard means, which can be useful for |
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581 testing. |
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582 """ |
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583 try: |
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584 protoname, caps = _performhandshake(ui, stdin, stdout, stderr) |
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585 except Exception: |
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586 _cleanuppipes(ui, stdout, stdin, stderr) |
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587 raise |
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588 |
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589 if protoname == wireprototypes.SSHV1: |
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590 return sshv1peer(ui, path, proc, stdin, stdout, stderr, caps, |
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591 autoreadstderr=autoreadstderr) |
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592 elif protoname == wireprototypes.SSHV2: |
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593 return sshv2peer(ui, path, proc, stdin, stdout, stderr, caps, |
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594 autoreadstderr=autoreadstderr) |
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595 else: |
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596 _cleanuppipes(ui, stdout, stdin, stderr) |
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597 raise error.RepoError(_('unknown version of SSH protocol: %s') % |
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598 protoname) |
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599 |
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600 def instance(ui, path, create, intents=None): |
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601 """Create an SSH peer. |
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602 |
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603 The returned object conforms to the ``wireprotov1peer.wirepeer`` interface. |
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604 """ |
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605 u = util.url(path, parsequery=False, parsefragment=False) |
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606 if u.scheme != 'ssh' or not u.host or u.path is None: |
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607 raise error.RepoError(_("couldn't parse location %s") % path) |
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608 |
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609 util.checksafessh(path) |
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610 |
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611 if u.passwd is not None: |
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612 raise error.RepoError(_('password in URL not supported')) |
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613 |
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614 sshcmd = ui.config('ui', 'ssh') |
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615 remotecmd = ui.config('ui', 'remotecmd') |
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616 sshaddenv = dict(ui.configitems('sshenv')) |
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617 sshenv = procutil.shellenviron(sshaddenv) |
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618 remotepath = u.path or '.' |
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619 |
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620 args = procutil.sshargs(sshcmd, u.host, u.user, u.port) |
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621 |
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622 if create: |
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623 cmd = '%s %s %s' % (sshcmd, args, |
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624 procutil.shellquote('%s init %s' % |
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625 (_serverquote(remotecmd), _serverquote(remotepath)))) |
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626 ui.debug('running %s\n' % cmd) |
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627 res = ui.system(cmd, blockedtag='sshpeer', environ=sshenv) |
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628 if res != 0: |
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629 raise error.RepoError(_('could not create remote repo')) |
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630 |
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631 proc, stdin, stdout, stderr = _makeconnection(ui, sshcmd, args, remotecmd, |
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632 remotepath, sshenv) |
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633 |
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634 peer = makepeer(ui, path, proc, stdin, stdout, stderr) |
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635 |
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636 # Finally, if supported by the server, notify it about our own |
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637 # capabilities. |
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638 if 'protocaps' in peer.capabilities(): |
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639 try: |
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640 peer._call("protocaps", |
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641 caps=' '.join(sorted(_clientcapabilities()))) |
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642 except IOError: |
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643 peer._cleanup() |
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644 raise error.RepoError(_('capability exchange failed')) |
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645 |
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646 return peer |