annotate hgext/largefiles/remotestore.py @ 45718:87c35b5a14eb

posix: avoid a leaked file descriptor in a unix domain socket exception case Differential Revision: https://phab.mercurial-scm.org/D9206
author Matt Harbison <matt_harbison@yahoo.com>
date Tue, 13 Oct 2020 16:44:57 -0400
parents 9d2b2df2c2ba
children 89a2afe31e82
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1 # Copyright 2010-2011 Fog Creek Software
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2 # Copyright 2010-2011 Unity Technologies
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3 #
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4 # This software may be used and distributed according to the terms of the
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5 # GNU General Public License version 2 or any later version.
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6
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7 '''remote largefile store; the base class for wirestore'''
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8 from __future__ import absolute_import
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9
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10 from mercurial.i18n import _
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11
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12 from mercurial import (
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13 error,
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14 pycompat,
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15 util,
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16 )
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17
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18 from mercurial.utils import stringutil
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19
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20 from . import (
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21 basestore,
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22 lfutil,
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23 localstore,
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24 )
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25
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26 urlerr = util.urlerr
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27 urlreq = util.urlreq
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28
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29
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30 class remotestore(basestore.basestore):
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31 '''a largefile store accessed over a network'''
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32
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33 def __init__(self, ui, repo, url):
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34 super(remotestore, self).__init__(ui, repo, url)
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35 self._lstore = None
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36 if repo is not None:
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37 self._lstore = localstore.localstore(self.ui, self.repo, self.repo)
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38
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39 def put(self, source, hash):
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40 if self.sendfile(source, hash):
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41 raise error.Abort(
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42 _(b'remotestore: could not put %s to remote store %s')
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43 % (source, util.hidepassword(self.url))
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44 )
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45 self.ui.debug(
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46 _(b'remotestore: put %s to remote store %s\n')
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47 % (source, util.hidepassword(self.url))
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48 )
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49
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50 def exists(self, hashes):
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51 return {
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52 h: s == 0
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53 for (h, s) in pycompat.iteritems(
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54 self._stat(hashes)
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55 ) # dict-from-generator
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56 }
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57
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58 def sendfile(self, filename, hash):
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59 self.ui.debug(b'remotestore: sendfile(%s, %s)\n' % (filename, hash))
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60 try:
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61 with lfutil.httpsendfile(self.ui, filename) as fd:
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62 return self._put(hash, fd)
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63 except IOError as e:
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64 raise error.Abort(
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65 _(b'remotestore: could not open file %s: %s')
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66 % (filename, stringutil.forcebytestr(e))
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67 )
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68
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69 def _getfile(self, tmpfile, filename, hash):
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70 try:
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71 chunks = self._get(hash)
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72 except urlerr.httperror as e:
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73 # 401s get converted to error.Aborts; everything else is fine being
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74 # turned into a StoreError
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75 raise basestore.StoreError(
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76 filename, hash, self.url, stringutil.forcebytestr(e)
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77 )
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78 except urlerr.urlerror as e:
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79 # This usually indicates a connection problem, so don't
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80 # keep trying with the other files... they will probably
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81 # all fail too.
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82 raise error.Abort(
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83 b'%s: %s' % (util.hidepassword(self.url), e.reason)
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84 )
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85 except IOError as e:
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86 raise basestore.StoreError(
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87 filename, hash, self.url, stringutil.forcebytestr(e)
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88 )
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89
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90 return lfutil.copyandhash(chunks, tmpfile)
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91
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92 def _hashesavailablelocally(self, hashes):
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93 existslocallymap = self._lstore.exists(hashes)
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94 localhashes = [hash for hash in hashes if existslocallymap[hash]]
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95 return localhashes
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96
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97 def _verifyfiles(self, contents, filestocheck):
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98 failed = False
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99 expectedhashes = [
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100 expectedhash for cset, filename, expectedhash in filestocheck
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101 ]
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102 localhashes = self._hashesavailablelocally(expectedhashes)
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103 stats = self._stat(
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104 [
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105 expectedhash
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106 for expectedhash in expectedhashes
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107 if expectedhash not in localhashes
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108 ]
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109 )
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110
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111 for cset, filename, expectedhash in filestocheck:
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112 if expectedhash in localhashes:
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113 filetocheck = (cset, filename, expectedhash)
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114 verifyresult = self._lstore._verifyfiles(
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115 contents, [filetocheck]
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116 )
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117 if verifyresult:
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118 failed = True
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119 else:
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120 stat = stats[expectedhash]
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121 if stat:
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122 if stat == 1:
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123 self.ui.warn(
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124 _(b'changeset %s: %s: contents differ\n')
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125 % (cset, filename)
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126 )
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127 failed = True
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128 elif stat == 2:
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129 self.ui.warn(
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130 _(b'changeset %s: %s missing\n') % (cset, filename)
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131 )
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132 failed = True
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133 else:
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134 raise RuntimeError(
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135 b'verify failed: unexpected response '
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136 b'from statlfile (%r)' % stat
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137 )
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138 return failed
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139
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140 def _put(self, hash, fd):
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141 '''Put file with the given hash in the remote store.'''
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142 raise NotImplementedError(b'abstract method')
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143
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144 def _get(self, hash):
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145 '''Get a iterator for content with the given hash.'''
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146 raise NotImplementedError(b'abstract method')
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147
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148 def _stat(self, hashes):
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149 '''Get information about availability of files specified by
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150 hashes in the remote store. Return dictionary mapping hashes
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151 to return code where 0 means that file is available, other
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152 values if not.'''
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Augie Fackler <augie@google.com>
parents: 43076
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153 raise NotImplementedError(b'abstract method')