Mercurial > hg
annotate mercurial/chgserver.py @ 37056:861e9d37e56e
wireproto: buffer output frames when in half duplex mode
Previously, when told that a response was ready, the server reactor
would instruct the caller to send frames immediately. This was OK
as an initial implementation. But it would not work for half-duplex
connections where the sender can't receive until all data has been
transmitted - such as httplib based clients.
In this commit, we teach the reactor that output frames should
be buffered until end of input is seen. This required a new
event to inform the reactor of end of input. The result from that
event will instruct the consumer to send all buffered frames.
The HTTP server is buffered by default.
This change effectively hides the complexity of buffering within
the reactor so that transports need not be concerned about it.
This helps keep the transports "dumb" and will make implementing
multiple requests-responses per atomic exchange (like an HTTP
request) much simpler.
Differential Revision: https://phab.mercurial-scm.org/D2860
author | Gregory Szorc <gregory.szorc@gmail.com> |
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date | Wed, 14 Mar 2018 14:01:16 -0700 |
parents | 5bc7ff103081 |
children | d4a2e0d5d042 |
rev | line source |
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1 # chgserver.py - command server extension for cHg |
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2 # |
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3 # Copyright 2011 Yuya Nishihara <yuya@tcha.org> |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 |
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8 """command server extension for cHg |
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9 |
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10 'S' channel (read/write) |
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11 propagate ui.system() request to client |
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12 |
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13 'attachio' command |
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14 attach client's stdio passed by sendmsg() |
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15 |
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16 'chdir' command |
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17 change current directory |
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18 |
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19 'setenv' command |
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20 replace os.environ completely |
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21 |
28325 | 22 'setumask' command |
23 set umask | |
24 | |
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25 'validate' command |
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26 reload the config and check if the server is up to date |
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27 |
28325 | 28 Config |
29 ------ | |
30 | |
31 :: | |
32 | |
33 [chgserver] | |
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34 # how long (in seconds) should an idle chg server exit |
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35 idletimeout = 3600 |
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36 |
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37 # whether to skip config or env change checks |
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38 skiphash = False |
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39 """ |
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40 |
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41 from __future__ import absolute_import |
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42 |
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43 import hashlib |
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44 import inspect |
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45 import os |
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46 import re |
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47 import socket |
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48 import stat |
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49 import struct |
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50 import time |
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51 |
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52 from .i18n import _ |
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53 |
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54 from . import ( |
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55 commandserver, |
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56 encoding, |
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57 error, |
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58 extensions, |
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59 node, |
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60 pycompat, |
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61 util, |
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62 ) |
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63 |
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64 _log = commandserver.log |
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65 |
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66 def _hashlist(items): |
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67 """return sha1 hexdigest for a list""" |
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68 return node.hex(hashlib.sha1(str(items)).digest()) |
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69 |
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70 # sensitive config sections affecting confighash |
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71 _configsections = [ |
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72 'alias', # affects global state commands.table |
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73 'eol', # uses setconfig('eol', ...) |
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74 'extdiff', # uisetup will register new commands |
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75 'extensions', |
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76 ] |
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77 |
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78 _configsectionitems = [ |
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79 ('commands', 'show.aliasprefix'), # show.py reads it in extsetup |
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80 ] |
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81 |
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82 # sensitive environment variables affecting confighash |
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83 _envre = re.compile(r'''\A(?: |
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84 CHGHG |
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85 |HG(?:DEMANDIMPORT|EMITWARNINGS|MODULEPOLICY|PROF|RCPATH)? |
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86 |HG(?:ENCODING|PLAIN).* |
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87 |LANG(?:UAGE)? |
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88 |LC_.* |
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89 |LD_.* |
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90 |PATH |
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91 |PYTHON.* |
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92 |TERM(?:INFO)? |
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93 |TZ |
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94 )\Z''', re.X) |
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95 |
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96 def _confighash(ui): |
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97 """return a quick hash for detecting config/env changes |
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98 |
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99 confighash is the hash of sensitive config items and environment variables. |
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100 |
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101 for chgserver, it is designed that once confighash changes, the server is |
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102 not qualified to serve its client and should redirect the client to a new |
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103 server. different from mtimehash, confighash change will not mark the |
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104 server outdated and exit since the user can have different configs at the |
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105 same time. |
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106 """ |
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107 sectionitems = [] |
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108 for section in _configsections: |
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109 sectionitems.append(ui.configitems(section)) |
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110 for section, item in _configsectionitems: |
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111 sectionitems.append(ui.config(section, item)) |
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112 sectionhash = _hashlist(sectionitems) |
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113 # If $CHGHG is set, the change to $HG should not trigger a new chg server |
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114 if 'CHGHG' in encoding.environ: |
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115 ignored = {'HG'} |
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116 else: |
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117 ignored = set() |
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118 envitems = [(k, v) for k, v in encoding.environ.iteritems() |
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119 if _envre.match(k) and k not in ignored] |
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120 envhash = _hashlist(sorted(envitems)) |
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121 return sectionhash[:6] + envhash[:6] |
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122 |
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123 def _getmtimepaths(ui): |
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124 """get a list of paths that should be checked to detect change |
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125 |
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126 The list will include: |
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127 - extensions (will not cover all files for complex extensions) |
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128 - mercurial/__version__.py |
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129 - python binary |
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130 """ |
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131 modules = [m for n, m in extensions.extensions(ui)] |
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132 try: |
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133 from . import __version__ |
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134 modules.append(__version__) |
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135 except ImportError: |
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136 pass |
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137 files = [pycompat.sysexecutable] |
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138 for m in modules: |
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139 try: |
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140 files.append(inspect.getabsfile(m)) |
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141 except TypeError: |
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142 pass |
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143 return sorted(set(files)) |
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144 |
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145 def _mtimehash(paths): |
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146 """return a quick hash for detecting file changes |
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147 |
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148 mtimehash calls stat on given paths and calculate a hash based on size and |
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149 mtime of each file. mtimehash does not read file content because reading is |
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150 expensive. therefore it's not 100% reliable for detecting content changes. |
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151 it's possible to return different hashes for same file contents. |
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152 it's also possible to return a same hash for different file contents for |
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153 some carefully crafted situation. |
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154 |
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155 for chgserver, it is designed that once mtimehash changes, the server is |
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156 considered outdated immediately and should no longer provide service. |
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157 |
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158 mtimehash is not included in confighash because we only know the paths of |
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159 extensions after importing them (there is imp.find_module but that faces |
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160 race conditions). We need to calculate confighash without importing. |
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161 """ |
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162 def trystat(path): |
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163 try: |
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164 st = os.stat(path) |
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165 return (st[stat.ST_MTIME], st.st_size) |
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166 except OSError: |
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167 # could be ENOENT, EPERM etc. not fatal in any case |
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168 pass |
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169 return _hashlist(map(trystat, paths))[:12] |
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170 |
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171 class hashstate(object): |
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172 """a structure storing confighash, mtimehash, paths used for mtimehash""" |
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173 def __init__(self, confighash, mtimehash, mtimepaths): |
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174 self.confighash = confighash |
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175 self.mtimehash = mtimehash |
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176 self.mtimepaths = mtimepaths |
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177 |
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178 @staticmethod |
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179 def fromui(ui, mtimepaths=None): |
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180 if mtimepaths is None: |
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181 mtimepaths = _getmtimepaths(ui) |
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182 confighash = _confighash(ui) |
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183 mtimehash = _mtimehash(mtimepaths) |
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184 _log('confighash = %s mtimehash = %s\n' % (confighash, mtimehash)) |
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185 return hashstate(confighash, mtimehash, mtimepaths) |
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186 |
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187 def _newchgui(srcui, csystem, attachio): |
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188 class chgui(srcui.__class__): |
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189 def __init__(self, src=None): |
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190 super(chgui, self).__init__(src) |
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191 if src: |
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192 self._csystem = getattr(src, '_csystem', csystem) |
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193 else: |
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194 self._csystem = csystem |
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195 |
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196 def _runsystem(self, cmd, environ, cwd, out): |
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197 # fallback to the original system method if the output needs to be |
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198 # captured (to self._buffers), or the output stream is not stdout |
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199 # (e.g. stderr, cStringIO), because the chg client is not aware of |
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200 # these situations and will behave differently (write to stdout). |
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201 if (out is not self.fout |
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202 or not util.safehasattr(self.fout, 'fileno') |
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203 or self.fout.fileno() != util.stdout.fileno()): |
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204 return util.system(cmd, environ=environ, cwd=cwd, out=out) |
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205 self.flush() |
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206 return self._csystem(cmd, util.shellenviron(environ), cwd) |
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207 |
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208 def _runpager(self, cmd, env=None): |
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209 self._csystem(cmd, util.shellenviron(env), type='pager', |
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210 cmdtable={'attachio': attachio}) |
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211 return True |
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212 |
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213 return chgui(srcui) |
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214 |
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215 def _loadnewui(srcui, args): |
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216 from . import dispatch # avoid cycle |
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217 |
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218 newui = srcui.__class__.load() |
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219 for a in ['fin', 'fout', 'ferr', 'environ']: |
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220 setattr(newui, a, getattr(srcui, a)) |
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221 if util.safehasattr(srcui, '_csystem'): |
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222 newui._csystem = srcui._csystem |
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223 |
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224 # command line args |
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225 options = dispatch._earlyparseopts(newui, args) |
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226 dispatch._parseconfig(newui, options['config']) |
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227 |
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228 # stolen from tortoisehg.util.copydynamicconfig() |
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229 for section, name, value in srcui.walkconfig(): |
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230 source = srcui.configsource(section, name) |
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231 if ':' in source or source == '--config' or source.startswith('$'): |
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232 # path:line or command line, or environ |
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233 continue |
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234 newui.setconfig(section, name, value, source) |
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235 |
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236 # load wd and repo config, copied from dispatch.py |
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237 cwd = options['cwd'] |
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238 cwd = cwd and os.path.realpath(cwd) or None |
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239 rpath = options['repository'] |
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240 path, newlui = dispatch._getlocal(newui, rpath, wd=cwd) |
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241 |
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242 return (newui, newlui) |
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243 |
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244 class channeledsystem(object): |
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245 """Propagate ui.system() request in the following format: |
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246 |
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247 payload length (unsigned int), |
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248 type, '\0', |
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249 cmd, '\0', |
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250 cwd, '\0', |
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251 envkey, '=', val, '\0', |
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252 ... |
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253 envkey, '=', val |
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254 |
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255 if type == 'system', waits for: |
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256 |
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257 exitcode length (unsigned int), |
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258 exitcode (int) |
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259 |
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260 if type == 'pager', repetitively waits for a command name ending with '\n' |
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261 and executes it defined by cmdtable, or exits the loop if the command name |
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262 is empty. |
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263 """ |
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264 def __init__(self, in_, out, channel): |
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265 self.in_ = in_ |
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266 self.out = out |
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267 self.channel = channel |
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268 |
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269 def __call__(self, cmd, environ, cwd=None, type='system', cmdtable=None): |
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270 args = [type, util.quotecommand(cmd), os.path.abspath(cwd or '.')] |
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271 args.extend('%s=%s' % (k, v) for k, v in environ.iteritems()) |
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272 data = '\0'.join(args) |
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273 self.out.write(struct.pack('>cI', self.channel, len(data))) |
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274 self.out.write(data) |
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275 self.out.flush() |
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276 |
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277 if type == 'system': |
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278 length = self.in_.read(4) |
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279 length, = struct.unpack('>I', length) |
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280 if length != 4: |
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281 raise error.Abort(_('invalid response')) |
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282 rc, = struct.unpack('>i', self.in_.read(4)) |
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283 return rc |
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284 elif type == 'pager': |
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285 while True: |
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286 cmd = self.in_.readline()[:-1] |
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287 if not cmd: |
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288 break |
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289 if cmdtable and cmd in cmdtable: |
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290 _log('pager subcommand: %s' % cmd) |
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291 cmdtable[cmd]() |
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292 else: |
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293 raise error.Abort(_('unexpected command: %s') % cmd) |
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294 else: |
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295 raise error.ProgrammingError('invalid S channel type: %s' % type) |
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296 |
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297 _iochannels = [ |
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298 # server.ch, ui.fp, mode |
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299 ('cin', 'fin', r'rb'), |
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300 ('cout', 'fout', r'wb'), |
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301 ('cerr', 'ferr', r'wb'), |
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302 ] |
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303 |
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304 class chgcmdserver(commandserver.server): |
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305 def __init__(self, ui, repo, fin, fout, sock, hashstate, baseaddress): |
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306 super(chgcmdserver, self).__init__( |
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307 _newchgui(ui, channeledsystem(fin, fout, 'S'), self.attachio), |
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308 repo, fin, fout) |
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309 self.clientsock = sock |
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310 self._oldios = [] # original (self.ch, ui.fp, fd) before "attachio" |
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311 self.hashstate = hashstate |
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312 self.baseaddress = baseaddress |
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313 if hashstate is not None: |
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314 self.capabilities = self.capabilities.copy() |
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315 self.capabilities['validate'] = chgcmdserver.validate |
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316 |
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317 def cleanup(self): |
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318 super(chgcmdserver, self).cleanup() |
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319 # dispatch._runcatch() does not flush outputs if exception is not |
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320 # handled by dispatch._dispatch() |
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321 self.ui.flush() |
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322 self._restoreio() |
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323 |
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324 def attachio(self): |
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325 """Attach to client's stdio passed via unix domain socket; all |
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326 channels except cresult will no longer be used |
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327 """ |
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328 # tell client to sendmsg() with 1-byte payload, which makes it |
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329 # distinctive from "attachio\n" command consumed by client.read() |
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330 self.clientsock.sendall(struct.pack('>cI', 'I', 1)) |
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331 clientfds = util.recvfds(self.clientsock.fileno()) |
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332 _log('received fds: %r\n' % clientfds) |
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333 |
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334 ui = self.ui |
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335 ui.flush() |
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336 first = self._saveio() |
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337 for fd, (cn, fn, mode) in zip(clientfds, _iochannels): |
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338 assert fd > 0 |
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339 fp = getattr(ui, fn) |
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340 os.dup2(fd, fp.fileno()) |
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341 os.close(fd) |
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342 if not first: |
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343 continue |
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344 # reset buffering mode when client is first attached. as we want |
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345 # to see output immediately on pager, the mode stays unchanged |
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346 # when client re-attached. ferr is unchanged because it should |
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347 # be unbuffered no matter if it is a tty or not. |
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348 if fn == 'ferr': |
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349 newfp = fp |
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350 else: |
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351 # make it line buffered explicitly because the default is |
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352 # decided on first write(), where fout could be a pager. |
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353 if fp.isatty(): |
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354 bufsize = 1 # line buffered |
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355 else: |
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356 bufsize = -1 # system default |
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357 newfp = os.fdopen(fp.fileno(), mode, bufsize) |
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358 setattr(ui, fn, newfp) |
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359 setattr(self, cn, newfp) |
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360 |
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361 self.cresult.write(struct.pack('>i', len(clientfds))) |
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362 |
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363 def _saveio(self): |
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364 if self._oldios: |
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365 return False |
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366 ui = self.ui |
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367 for cn, fn, _mode in _iochannels: |
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368 ch = getattr(self, cn) |
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369 fp = getattr(ui, fn) |
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370 fd = os.dup(fp.fileno()) |
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371 self._oldios.append((ch, fp, fd)) |
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372 return True |
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373 |
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374 def _restoreio(self): |
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375 ui = self.ui |
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376 for (ch, fp, fd), (cn, fn, _mode) in zip(self._oldios, _iochannels): |
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377 newfp = getattr(ui, fn) |
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378 # close newfp while it's associated with client; otherwise it |
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379 # would be closed when newfp is deleted |
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380 if newfp is not fp: |
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381 newfp.close() |
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382 # restore original fd: fp is open again |
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383 os.dup2(fd, fp.fileno()) |
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384 os.close(fd) |
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385 setattr(self, cn, ch) |
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386 setattr(ui, fn, fp) |
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387 del self._oldios[:] |
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388 |
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389 def validate(self): |
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390 """Reload the config and check if the server is up to date |
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391 |
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392 Read a list of '\0' separated arguments. |
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393 Write a non-empty list of '\0' separated instruction strings or '\0' |
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394 if the list is empty. |
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395 An instruction string could be either: |
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396 - "unlink $path", the client should unlink the path to stop the |
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397 outdated server. |
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398 - "redirect $path", the client should attempt to connect to $path |
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399 first. If it does not work, start a new server. It implies |
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400 "reconnect". |
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401 - "exit $n", the client should exit directly with code n. |
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402 This may happen if we cannot parse the config. |
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403 - "reconnect", the client should close the connection and |
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404 reconnect. |
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405 If neither "reconnect" nor "redirect" is included in the instruction |
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406 list, the client can continue with this server after completing all |
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407 the instructions. |
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408 """ |
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409 from . import dispatch # avoid cycle |
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410 |
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411 args = self._readlist() |
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412 try: |
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413 self.ui, lui = _loadnewui(self.ui, args) |
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414 except error.ParseError as inst: |
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415 dispatch._formatparse(self.ui.warn, inst) |
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416 self.ui.flush() |
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417 self.cresult.write('exit 255') |
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418 return |
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419 newhash = hashstate.fromui(lui, self.hashstate.mtimepaths) |
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420 insts = [] |
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421 if newhash.mtimehash != self.hashstate.mtimehash: |
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422 addr = _hashaddress(self.baseaddress, self.hashstate.confighash) |
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423 insts.append('unlink %s' % addr) |
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424 # mtimehash is empty if one or more extensions fail to load. |
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425 # to be compatible with hg, still serve the client this time. |
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426 if self.hashstate.mtimehash: |
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427 insts.append('reconnect') |
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428 if newhash.confighash != self.hashstate.confighash: |
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429 addr = _hashaddress(self.baseaddress, newhash.confighash) |
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430 insts.append('redirect %s' % addr) |
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431 _log('validate: %s\n' % insts) |
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432 self.cresult.write('\0'.join(insts) or '\0') |
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433 |
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434 def chdir(self): |
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435 """Change current directory |
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436 |
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437 Note that the behavior of --cwd option is bit different from this. |
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438 It does not affect --config parameter. |
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439 """ |
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440 path = self._readstr() |
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441 if not path: |
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442 return |
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443 _log('chdir to %r\n' % path) |
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444 os.chdir(path) |
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445 |
28159 | 446 def setumask(self): |
447 """Change umask""" | |
448 mask = struct.unpack('>I', self._read(4))[0] | |
449 _log('setumask %r\n' % mask) | |
450 os.umask(mask) | |
451 | |
30644 | 452 def runcommand(self): |
453 return super(chgcmdserver, self).runcommand() | |
454 | |
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455 def setenv(self): |
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456 """Clear and update os.environ |
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457 |
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458 Note that not all variables can make an effect on the running process. |
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459 """ |
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460 l = self._readlist() |
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461 try: |
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462 newenv = dict(s.split('=', 1) for s in l) |
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463 except ValueError: |
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464 raise ValueError('unexpected value in setenv request') |
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465 _log('setenv: %r\n' % sorted(newenv.keys())) |
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466 encoding.environ.clear() |
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467 encoding.environ.update(newenv) |
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468 |
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469 capabilities = commandserver.server.capabilities.copy() |
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470 capabilities.update({'attachio': attachio, |
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471 'chdir': chdir, |
30644 | 472 'runcommand': runcommand, |
28159 | 473 'setenv': setenv, |
474 'setumask': setumask}) | |
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475 |
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476 if util.safehasattr(util, 'setprocname'): |
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477 def setprocname(self): |
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478 """Change process title""" |
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479 name = self._readstr() |
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480 _log('setprocname: %r\n' % name) |
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481 util.setprocname(name) |
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482 capabilities['setprocname'] = setprocname |
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483 |
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484 def _tempaddress(address): |
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485 return '%s.%d.tmp' % (address, os.getpid()) |
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486 |
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487 def _hashaddress(address, hashstr): |
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488 # if the basename of address contains '.', use only the left part. this |
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489 # makes it possible for the client to pass 'server.tmp$PID' and follow by |
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490 # an atomic rename to avoid locking when spawning new servers. |
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491 dirname, basename = os.path.split(address) |
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492 basename = basename.split('.', 1)[0] |
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493 return '%s-%s' % (os.path.join(dirname, basename), hashstr) |
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494 |
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495 class chgunixservicehandler(object): |
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496 """Set of operations for chg services""" |
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497 |
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498 pollinterval = 1 # [sec] |
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499 |
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500 def __init__(self, ui): |
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501 self.ui = ui |
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502 self._idletimeout = ui.configint('chgserver', 'idletimeout') |
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503 self._lastactive = time.time() |
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504 |
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505 def bindsocket(self, sock, address): |
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chgserver: refactor initialization of real/base addresses
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
506 self._inithashstate(address) |
29545
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
507 self._checkextensions() |
29547
300318b7d66d
chgserver: switch to new forking service
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
508 self._bind(sock) |
29545
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
509 self._createsymlink() |
32237
1ada3d18e7fb
commandserver: move printbanner logic to bindsocket
Jun Wu <quark@fb.com>
parents:
32236
diff
changeset
|
510 # no "listening at" message should be printed to simulate hg behavior |
29545
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
511 |
29597
581c0c7cb258
chgserver: refactor initialization of real/base addresses
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
512 def _inithashstate(self, address): |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29597
diff
changeset
|
513 self._baseaddress = address |
33499
0407a51b9d8c
codemod: register core configitems using a script
Jun Wu <quark@fb.com>
parents:
32271
diff
changeset
|
514 if self.ui.configbool('chgserver', 'skiphash'): |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
515 self._hashstate = None |
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
516 self._realaddress = address |
29545
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
517 return |
29598
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chgserver: rename private functions and variables of chgunixservicehandler
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parents:
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diff
changeset
|
518 self._hashstate = hashstate.fromui(self.ui) |
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
519 self._realaddress = _hashaddress(address, self._hashstate.confighash) |
29545
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
520 |
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
521 def _checkextensions(self): |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
522 if not self._hashstate: |
29545
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
29543
diff
changeset
|
523 return |
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
29543
diff
changeset
|
524 if extensions.notloaded(): |
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
29543
diff
changeset
|
525 # one or more extensions failed to load. mtimehash becomes |
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
29543
diff
changeset
|
526 # meaningless because we do not know the paths of those extensions. |
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
29543
diff
changeset
|
527 # set mtimehash to an illegal hash value to invalidate the server. |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29597
diff
changeset
|
528 self._hashstate.mtimehash = '' |
29545
28aca3fafc2a
chgserver: reorder service classes to make future patches readable
Yuya Nishihara <yuya@tcha.org>
parents:
29543
diff
changeset
|
529 |
29547
300318b7d66d
chgserver: switch to new forking service
Yuya Nishihara <yuya@tcha.org>
parents:
29546
diff
changeset
|
530 def _bind(self, sock): |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
531 # use a unique temp address so we can stat the file and do ownership |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
532 # check later |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
533 tempaddress = _tempaddress(self._realaddress) |
29547
300318b7d66d
chgserver: switch to new forking service
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
534 util.bindunixsocket(sock, tempaddress) |
29529
02de1dbd4f6e
chgserver: narrow scope of chdir() to socket.bind()
Yuya Nishihara <yuya@tcha.org>
parents:
29513
diff
changeset
|
535 self._socketstat = os.stat(tempaddress) |
32236
c8b9943c07eb
commandserver: move "listen" responsibility from service to handler
Jun Wu <quark@fb.com>
parents:
32208
diff
changeset
|
536 sock.listen(socket.SOMAXCONN) |
29529
02de1dbd4f6e
chgserver: narrow scope of chdir() to socket.bind()
Yuya Nishihara <yuya@tcha.org>
parents:
29513
diff
changeset
|
537 # rename will replace the old socket file if exists atomically. the |
02de1dbd4f6e
chgserver: narrow scope of chdir() to socket.bind()
Yuya Nishihara <yuya@tcha.org>
parents:
29513
diff
changeset
|
538 # old server will detect ownership change and exit. |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
539 util.rename(tempaddress, self._realaddress) |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
540 |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
541 def _createsymlink(self): |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29597
diff
changeset
|
542 if self._baseaddress == self._realaddress: |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
543 return |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
544 tempaddress = _tempaddress(self._baseaddress) |
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
545 os.symlink(os.path.basename(self._realaddress), tempaddress) |
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29597
diff
changeset
|
546 util.rename(tempaddress, self._baseaddress) |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
547 |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29597
diff
changeset
|
548 def _issocketowner(self): |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
549 try: |
36781
ffa3026d4196
cleanup: use stat_result[stat.ST_MTIME] instead of stat_result.st_mtime
Augie Fackler <augie@google.com>
parents:
35582
diff
changeset
|
550 st = os.stat(self._realaddress) |
ffa3026d4196
cleanup: use stat_result[stat.ST_MTIME] instead of stat_result.st_mtime
Augie Fackler <augie@google.com>
parents:
35582
diff
changeset
|
551 return (st.st_ino == self._socketstat.st_ino and |
ffa3026d4196
cleanup: use stat_result[stat.ST_MTIME] instead of stat_result.st_mtime
Augie Fackler <augie@google.com>
parents:
35582
diff
changeset
|
552 st[stat.ST_MTIME] == self._socketstat[stat.ST_MTIME]) |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
553 except OSError: |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
554 return False |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
555 |
29547
300318b7d66d
chgserver: switch to new forking service
Yuya Nishihara <yuya@tcha.org>
parents:
29546
diff
changeset
|
556 def unlinksocket(self, address): |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29597
diff
changeset
|
557 if not self._issocketowner(): |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
558 return |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
559 # it is possible to have a race condition here that we may |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
560 # remove another server's socket file. but that's okay |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
561 # since that server will detect and exit automatically and |
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
562 # the client will start a new server on demand. |
31545 | 563 util.tryunlink(self._realaddress) |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
564 |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
565 def shouldexit(self): |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29597
diff
changeset
|
566 if not self._issocketowner(): |
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
567 self.ui.debug('%s is not owned, exiting.\n' % self._realaddress) |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
568 return True |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29597
diff
changeset
|
569 if time.time() - self._lastactive > self._idletimeout: |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
570 self.ui.debug('being idle too long. exiting.\n') |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
571 return True |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
572 return False |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
573 |
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
574 def newconnection(self): |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
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diff
changeset
|
575 self._lastactive = time.time() |
29596
71c197d82b7e
chgserver: reorder functions in chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29595
diff
changeset
|
576 |
29547
300318b7d66d
chgserver: switch to new forking service
Yuya Nishihara <yuya@tcha.org>
parents:
29546
diff
changeset
|
577 def createcmdserver(self, repo, conn, fin, fout): |
300318b7d66d
chgserver: switch to new forking service
Yuya Nishihara <yuya@tcha.org>
parents:
29546
diff
changeset
|
578 return chgcmdserver(self.ui, repo, fin, fout, conn, |
29598
a67398726747
chgserver: rename private functions and variables of chgunixservicehandler
Yuya Nishihara <yuya@tcha.org>
parents:
29597
diff
changeset
|
579 self._hashstate, self._baseaddress) |
28223
0a853dc9b306
chgserver: auto exit after being idle for too long or lose the socket file
Jun Wu <quark@fb.com>
parents:
28159
diff
changeset
|
580 |
29546
a7513390a9db
chgserver: extract stub factory of service object
Yuya Nishihara <yuya@tcha.org>
parents:
29545
diff
changeset
|
581 def chgunixservice(ui, repo, opts): |
33860
3cfc9070245f
demandimport: disable if chg is being used
Jun Wu <quark@fb.com>
parents:
33499
diff
changeset
|
582 # CHGINTERNALMARK is set by chg client. It is an indication of things are |
3cfc9070245f
demandimport: disable if chg is being used
Jun Wu <quark@fb.com>
parents:
33499
diff
changeset
|
583 # started by chg so other code can do things accordingly, like disabling |
3cfc9070245f
demandimport: disable if chg is being used
Jun Wu <quark@fb.com>
parents:
33499
diff
changeset
|
584 # demandimport or detecting chg client started by chg client. When executed |
3cfc9070245f
demandimport: disable if chg is being used
Jun Wu <quark@fb.com>
parents:
33499
diff
changeset
|
585 # here, CHGINTERNALMARK is no longer useful and hence dropped to make |
3cfc9070245f
demandimport: disable if chg is being used
Jun Wu <quark@fb.com>
parents:
33499
diff
changeset
|
586 # environ cleaner. |
30635
a150173da1c1
py3: replace os.environ with encoding.environ (part 2 of 5)
Pulkit Goyal <7895pulkit@gmail.com>
parents:
30619
diff
changeset
|
587 if 'CHGINTERNALMARK' in encoding.environ: |
a150173da1c1
py3: replace os.environ with encoding.environ (part 2 of 5)
Pulkit Goyal <7895pulkit@gmail.com>
parents:
30619
diff
changeset
|
588 del encoding.environ['CHGINTERNALMARK'] |
30511
1873563e1ede
chgserver: drop CHGINTERNALMARK by chgunixservice()
Yuya Nishihara <yuya@tcha.org>
parents:
30507
diff
changeset
|
589 |
29546
a7513390a9db
chgserver: extract stub factory of service object
Yuya Nishihara <yuya@tcha.org>
parents:
29545
diff
changeset
|
590 if repo: |
30332
318a24b52eeb
spelling: fixes of non-dictionary words
Mads Kiilerich <madski@unity3d.com>
parents:
29841
diff
changeset
|
591 # one chgserver can serve multiple repos. drop repo information |
29546
a7513390a9db
chgserver: extract stub factory of service object
Yuya Nishihara <yuya@tcha.org>
parents:
29545
diff
changeset
|
592 ui.setconfig('bundle', 'mainreporoot', '', 'repo') |
29547
300318b7d66d
chgserver: switch to new forking service
Yuya Nishihara <yuya@tcha.org>
parents:
29546
diff
changeset
|
593 h = chgunixservicehandler(ui) |
300318b7d66d
chgserver: switch to new forking service
Yuya Nishihara <yuya@tcha.org>
parents:
29546
diff
changeset
|
594 return commandserver.unixforkingservice(ui, repo=None, opts=opts, handler=h) |