Mercurial > hg
annotate tests/badserverext.py @ 41731:92055d539e49
tests: conditionalize msys path mangling in test-bundle.t
This broke in 252cc56c9ff6 when the variables were printed one per line. The
only reason I can think of is that MSYS knew the former string couldn't be a
list of paths, but thinks this form is.
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Sat, 16 Feb 2019 22:03:58 -0500 |
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1 # badserverext.py - Extension making servers behave badly |
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2 # |
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3 # Copyright 2017 Gregory Szorc <gregory.szorc@gmail.com> |
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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 # no-check-code |
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9 |
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10 """Extension to make servers behave badly. |
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11 |
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12 This extension is useful for testing Mercurial behavior when various network |
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13 events occur. |
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14 |
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15 Various config options in the [badserver] section influence behavior: |
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16 |
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17 closebeforeaccept |
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18 If true, close() the server socket when a new connection arrives before |
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19 accept() is called. The server will then exit. |
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20 |
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21 closeafteraccept |
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22 If true, the server will close() the client socket immediately after |
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23 accept(). |
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24 |
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25 closeafterrecvbytes |
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26 If defined, close the client socket after receiving this many bytes. |
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27 |
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28 closeaftersendbytes |
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29 If defined, close the client socket after sending this many bytes. |
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30 """ |
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31 |
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32 from __future__ import absolute_import |
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33 |
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34 import socket |
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35 |
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36 from mercurial import( |
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37 pycompat, |
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38 registrar, |
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39 ) |
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40 |
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41 from mercurial.hgweb import ( |
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42 server, |
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43 ) |
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44 |
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45 configtable = {} |
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46 configitem = registrar.configitem(configtable) |
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47 |
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48 configitem(b'badserver', b'closeafteraccept', |
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49 default=False, |
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50 ) |
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51 configitem(b'badserver', b'closeafterrecvbytes', |
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52 default=b'0', |
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53 ) |
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54 configitem(b'badserver', b'closeaftersendbytes', |
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55 default=b'0', |
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56 ) |
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57 configitem(b'badserver', b'closebeforeaccept', |
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58 default=False, |
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59 ) |
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60 |
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61 # We can't adjust __class__ on a socket instance. So we define a proxy type. |
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62 class socketproxy(object): |
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63 __slots__ = ( |
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64 '_orig', |
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65 '_logfp', |
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66 '_closeafterrecvbytes', |
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67 '_closeaftersendbytes', |
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68 ) |
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69 |
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70 def __init__(self, obj, logfp, closeafterrecvbytes=0, |
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71 closeaftersendbytes=0): |
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72 object.__setattr__(self, '_orig', obj) |
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73 object.__setattr__(self, '_logfp', logfp) |
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74 object.__setattr__(self, '_closeafterrecvbytes', closeafterrecvbytes) |
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75 object.__setattr__(self, '_closeaftersendbytes', closeaftersendbytes) |
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76 |
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77 def __getattribute__(self, name): |
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78 if name in ('makefile', 'sendall', '_writelog'): |
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79 return object.__getattribute__(self, name) |
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80 |
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81 return getattr(object.__getattribute__(self, '_orig'), name) |
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82 |
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83 def __delattr__(self, name): |
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84 delattr(object.__getattribute__(self, '_orig'), name) |
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85 |
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86 def __setattr__(self, name, value): |
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87 setattr(object.__getattribute__(self, '_orig'), name, value) |
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88 |
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89 def _writelog(self, msg): |
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90 msg = msg.replace(b'\r', b'\\r').replace(b'\n', b'\\n') |
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91 |
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92 object.__getattribute__(self, '_logfp').write(msg) |
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93 object.__getattribute__(self, '_logfp').write(b'\n') |
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94 object.__getattribute__(self, '_logfp').flush() |
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95 |
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96 def makefile(self, mode, bufsize): |
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97 f = object.__getattribute__(self, '_orig').makefile(mode, bufsize) |
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98 |
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99 logfp = object.__getattribute__(self, '_logfp') |
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100 closeafterrecvbytes = object.__getattribute__(self, |
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101 '_closeafterrecvbytes') |
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102 closeaftersendbytes = object.__getattribute__(self, |
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103 '_closeaftersendbytes') |
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104 |
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105 return fileobjectproxy(f, logfp, |
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106 closeafterrecvbytes=closeafterrecvbytes, |
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107 closeaftersendbytes=closeaftersendbytes) |
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108 |
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109 def sendall(self, data, flags=0): |
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110 remaining = object.__getattribute__(self, '_closeaftersendbytes') |
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111 |
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112 # No read limit. Call original function. |
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113 if not remaining: |
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114 result = object.__getattribute__(self, '_orig').sendall(data, flags) |
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115 self._writelog(b'sendall(%d) -> %s' % (len(data), data)) |
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116 return result |
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117 |
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118 if len(data) > remaining: |
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119 newdata = data[0:remaining] |
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120 else: |
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121 newdata = data |
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122 |
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123 remaining -= len(newdata) |
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124 |
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125 result = object.__getattribute__(self, '_orig').sendall(newdata, flags) |
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126 |
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127 self._writelog(b'sendall(%d from %d) -> (%d) %s' % ( |
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128 len(newdata), len(data), remaining, newdata)) |
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129 |
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130 object.__setattr__(self, '_closeaftersendbytes', remaining) |
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131 |
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132 if remaining <= 0: |
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133 self._writelog(b'write limit reached; closing socket') |
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134 object.__getattribute__(self, '_orig').shutdown(socket.SHUT_RDWR) |
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135 |
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136 raise Exception('connection closed after sending N bytes') |
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137 |
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138 return result |
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139 |
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140 |
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141 # We can't adjust __class__ on socket._fileobject, so define a proxy. |
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142 class fileobjectproxy(object): |
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143 __slots__ = ( |
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144 '_orig', |
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145 '_logfp', |
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146 '_closeafterrecvbytes', |
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147 '_closeaftersendbytes', |
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148 ) |
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149 |
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150 def __init__(self, obj, logfp, closeafterrecvbytes=0, |
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151 closeaftersendbytes=0): |
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152 object.__setattr__(self, '_orig', obj) |
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153 object.__setattr__(self, '_logfp', logfp) |
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154 object.__setattr__(self, '_closeafterrecvbytes', closeafterrecvbytes) |
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155 object.__setattr__(self, '_closeaftersendbytes', closeaftersendbytes) |
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156 |
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157 def __getattribute__(self, name): |
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158 if name in ('_close', 'read', 'readline', 'write', '_writelog'): |
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159 return object.__getattribute__(self, name) |
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160 |
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161 return getattr(object.__getattribute__(self, '_orig'), name) |
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162 |
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163 def __delattr__(self, name): |
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164 delattr(object.__getattribute__(self, '_orig'), name) |
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165 |
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166 def __setattr__(self, name, value): |
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167 setattr(object.__getattribute__(self, '_orig'), name, value) |
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168 |
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169 def _writelog(self, msg): |
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170 msg = msg.replace(b'\r', b'\\r').replace(b'\n', b'\\n') |
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171 |
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172 object.__getattribute__(self, '_logfp').write(msg) |
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173 object.__getattribute__(self, '_logfp').write(b'\n') |
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174 object.__getattribute__(self, '_logfp').flush() |
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175 |
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176 def _close(self): |
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177 # Python 3 uses an io.BufferedIO instance. Python 2 uses some file |
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178 # object wrapper. |
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179 if pycompat.ispy3: |
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180 orig = object.__getattribute__(self, '_orig') |
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181 |
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182 if hasattr(orig, 'raw'): |
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183 orig.raw._sock.shutdown(socket.SHUT_RDWR) |
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184 else: |
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185 self.close() |
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186 else: |
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187 self._sock.shutdown(socket.SHUT_RDWR) |
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188 |
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189 def read(self, size=-1): |
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190 remaining = object.__getattribute__(self, '_closeafterrecvbytes') |
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191 |
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192 # No read limit. Call original function. |
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193 if not remaining: |
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194 result = object.__getattribute__(self, '_orig').read(size) |
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195 self._writelog(b'read(%d) -> (%d) (%s) %s' % (size, |
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196 len(result), |
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197 result)) |
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198 return result |
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199 |
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200 origsize = size |
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201 |
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202 if size < 0: |
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203 size = remaining |
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204 else: |
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205 size = min(remaining, size) |
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206 |
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207 result = object.__getattribute__(self, '_orig').read(size) |
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208 remaining -= len(result) |
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209 |
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210 self._writelog(b'read(%d from %d) -> (%d) %s' % ( |
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211 size, origsize, len(result), result)) |
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212 |
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213 object.__setattr__(self, '_closeafterrecvbytes', remaining) |
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214 |
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215 if remaining <= 0: |
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216 self._writelog(b'read limit reached, closing socket') |
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217 self._close() |
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218 |
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219 # This is the easiest way to abort the current request. |
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220 raise Exception('connection closed after receiving N bytes') |
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221 |
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222 return result |
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223 |
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224 def readline(self, size=-1): |
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225 remaining = object.__getattribute__(self, '_closeafterrecvbytes') |
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226 |
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227 # No read limit. Call original function. |
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228 if not remaining: |
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229 result = object.__getattribute__(self, '_orig').readline(size) |
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230 self._writelog(b'readline(%d) -> (%d) %s' % ( |
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231 size, len(result), result)) |
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232 return result |
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233 |
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234 origsize = size |
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235 |
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236 if size < 0: |
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237 size = remaining |
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238 else: |
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239 size = min(remaining, size) |
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240 |
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241 result = object.__getattribute__(self, '_orig').readline(size) |
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242 remaining -= len(result) |
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243 |
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244 self._writelog(b'readline(%d from %d) -> (%d) %s' % ( |
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245 size, origsize, len(result), result)) |
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246 |
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247 object.__setattr__(self, '_closeafterrecvbytes', remaining) |
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248 |
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249 if remaining <= 0: |
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250 self._writelog(b'read limit reached; closing socket') |
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251 self._close() |
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252 |
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253 # This is the easiest way to abort the current request. |
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254 raise Exception('connection closed after receiving N bytes') |
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255 |
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256 return result |
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257 |
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258 def write(self, data): |
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259 remaining = object.__getattribute__(self, '_closeaftersendbytes') |
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260 |
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261 # No byte limit on this operation. Call original function. |
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262 if not remaining: |
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263 self._writelog(b'write(%d) -> %s' % (len(data), data)) |
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264 result = object.__getattribute__(self, '_orig').write(data) |
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265 return result |
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266 |
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267 if len(data) > remaining: |
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268 newdata = data[0:remaining] |
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269 else: |
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270 newdata = data |
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271 |
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272 remaining -= len(newdata) |
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273 |
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274 self._writelog(b'write(%d from %d) -> (%d) %s' % ( |
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275 len(newdata), len(data), remaining, newdata)) |
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276 |
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277 result = object.__getattribute__(self, '_orig').write(newdata) |
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278 |
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279 object.__setattr__(self, '_closeaftersendbytes', remaining) |
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280 |
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281 if remaining <= 0: |
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282 self._writelog(b'write limit reached; closing socket') |
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283 self._close() |
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284 |
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285 raise Exception('connection closed after sending N bytes') |
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286 |
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287 return result |
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288 |
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289 def extsetup(ui): |
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290 # Change the base HTTP server class so various events can be performed. |
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291 # See SocketServer.BaseServer for how the specially named methods work. |
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292 class badserver(server.MercurialHTTPServer): |
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293 def __init__(self, ui, *args, **kwargs): |
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294 self._ui = ui |
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295 super(badserver, self).__init__(ui, *args, **kwargs) |
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296 |
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297 recvbytes = self._ui.config(b'badserver', b'closeafterrecvbytes') |
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298 recvbytes = recvbytes.split(b',') |
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299 self.closeafterrecvbytes = [int(v) for v in recvbytes if v] |
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300 sendbytes = self._ui.config(b'badserver', b'closeaftersendbytes') |
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301 sendbytes = sendbytes.split(b',') |
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302 self.closeaftersendbytes = [int(v) for v in sendbytes if v] |
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303 |
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304 # Need to inherit object so super() works. |
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305 class badrequesthandler(self.RequestHandlerClass, object): |
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306 def send_header(self, name, value): |
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307 # Make headers deterministic to facilitate testing. |
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308 if name.lower() == 'date': |
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309 value = 'Fri, 14 Apr 2017 00:00:00 GMT' |
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310 elif name.lower() == 'server': |
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311 value = 'badhttpserver' |
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312 |
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313 return super(badrequesthandler, self).send_header(name, |
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314 value) |
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315 |
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316 self.RequestHandlerClass = badrequesthandler |
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317 |
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318 # Called to accept() a pending socket. |
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319 def get_request(self): |
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320 if self._ui.configbool(b'badserver', b'closebeforeaccept'): |
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321 self.socket.close() |
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322 |
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323 # Tells the server to stop processing more requests. |
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324 self.__shutdown_request = True |
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325 |
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326 # Simulate failure to stop processing this request. |
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327 raise socket.error('close before accept') |
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328 |
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329 if self._ui.configbool(b'badserver', b'closeafteraccept'): |
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330 request, client_address = super(badserver, self).get_request() |
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331 request.close() |
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332 raise socket.error('close after accept') |
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333 |
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334 return super(badserver, self).get_request() |
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335 |
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336 # Does heavy lifting of processing a request. Invokes |
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337 # self.finish_request() which calls self.RequestHandlerClass() which |
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338 # is a hgweb.server._httprequesthandler. |
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339 def process_request(self, socket, address): |
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340 # Wrap socket in a proxy if we need to count bytes. |
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341 if self.closeafterrecvbytes: |
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342 closeafterrecvbytes = self.closeafterrecvbytes.pop(0) |
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343 else: |
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344 closeafterrecvbytes = 0 |
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345 if self.closeaftersendbytes: |
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346 closeaftersendbytes = self.closeaftersendbytes.pop(0) |
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347 else: |
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348 closeaftersendbytes = 0 |
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349 |
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350 if closeafterrecvbytes or closeaftersendbytes: |
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351 socket = socketproxy(socket, self.errorlog, |
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352 closeafterrecvbytes=closeafterrecvbytes, |
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353 closeaftersendbytes=closeaftersendbytes) |
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354 |
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355 return super(badserver, self).process_request(socket, address) |
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356 |
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357 server.MercurialHTTPServer = badserver |