Mercurial > hg
annotate tests/badserverext.py @ 32120:8ca9b3add033
cleanup: drop the deprecated 'localrepo.wfile' method
This was deprecated in favor of 'localrepo.wvfs.join'. We can now drop it for the
future 4.3.
author | Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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date | Tue, 02 May 2017 02:04:55 +0200 |
parents | 08e46fcb8637 |
children | 8065b4ab0ed7 |
rev | line source |
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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.hgweb import ( |
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37 server, |
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38 ) |
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39 |
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40 # We can't adjust __class__ on a socket instance. So we define a proxy type. |
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41 class socketproxy(object): |
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42 __slots__ = ( |
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43 '_orig', |
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44 '_logfp', |
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45 '_closeafterrecvbytes', |
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46 '_closeaftersendbytes', |
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47 ) |
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48 |
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49 def __init__(self, obj, logfp, closeafterrecvbytes=0, |
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50 closeaftersendbytes=0): |
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51 object.__setattr__(self, '_orig', obj) |
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52 object.__setattr__(self, '_logfp', logfp) |
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53 object.__setattr__(self, '_closeafterrecvbytes', closeafterrecvbytes) |
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54 object.__setattr__(self, '_closeaftersendbytes', closeaftersendbytes) |
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55 |
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56 def __getattribute__(self, name): |
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57 if name in ('makefile',): |
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58 return object.__getattribute__(self, name) |
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59 |
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60 return getattr(object.__getattribute__(self, '_orig'), name) |
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61 |
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62 def __delattr__(self, name): |
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63 delattr(object.__getattribute__(self, '_orig'), name) |
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64 |
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65 def __setattr__(self, name, value): |
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66 setattr(object.__getattribute__(self, '_orig'), name, value) |
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67 |
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68 def makefile(self, mode, bufsize): |
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69 f = object.__getattribute__(self, '_orig').makefile(mode, bufsize) |
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70 |
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71 logfp = object.__getattribute__(self, '_logfp') |
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72 closeafterrecvbytes = object.__getattribute__(self, |
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73 '_closeafterrecvbytes') |
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74 closeaftersendbytes = object.__getattribute__(self, |
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75 '_closeaftersendbytes') |
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76 |
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77 return fileobjectproxy(f, logfp, |
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78 closeafterrecvbytes=closeafterrecvbytes, |
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79 closeaftersendbytes=closeaftersendbytes) |
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80 |
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81 # We can't adjust __class__ on socket._fileobject, so define a proxy. |
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82 class fileobjectproxy(object): |
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83 __slots__ = ( |
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84 '_orig', |
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85 '_logfp', |
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86 '_closeafterrecvbytes', |
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87 '_closeaftersendbytes', |
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88 ) |
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89 |
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90 def __init__(self, obj, logfp, closeafterrecvbytes=0, |
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91 closeaftersendbytes=0): |
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92 object.__setattr__(self, '_orig', obj) |
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93 object.__setattr__(self, '_logfp', logfp) |
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94 object.__setattr__(self, '_closeafterrecvbytes', closeafterrecvbytes) |
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95 object.__setattr__(self, '_closeaftersendbytes', closeaftersendbytes) |
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96 |
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97 def __getattribute__(self, name): |
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98 if name in ('read', 'readline', 'write', '_writelog'): |
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99 return object.__getattribute__(self, name) |
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100 |
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101 return getattr(object.__getattribute__(self, '_orig'), name) |
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102 |
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103 def __delattr__(self, name): |
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104 delattr(object.__getattribute__(self, '_orig'), name) |
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105 |
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106 def __setattr__(self, name, value): |
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107 setattr(object.__getattribute__(self, '_orig'), name, value) |
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108 |
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109 def _writelog(self, msg): |
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110 msg = msg.replace('\r', '\\r').replace('\n', '\\n') |
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111 |
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112 object.__getattribute__(self, '_logfp').write(msg) |
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113 object.__getattribute__(self, '_logfp').write('\n') |
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114 object.__getattribute__(self, '_logfp').flush() |
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115 |
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116 def read(self, size=-1): |
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117 remaining = object.__getattribute__(self, '_closeafterrecvbytes') |
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118 |
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119 # No read limit. Call original function. |
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120 if not remaining: |
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121 result = object.__getattribute__(self, '_orig').read(size) |
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122 self._writelog('read(%d) -> (%d) (%s) %s' % (size, |
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123 len(result), |
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124 result)) |
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125 return result |
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126 |
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127 origsize = size |
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128 |
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129 if size < 0: |
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130 size = remaining |
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131 else: |
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132 size = min(remaining, size) |
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133 |
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134 result = object.__getattribute__(self, '_orig').read(size) |
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135 remaining -= len(result) |
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136 |
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137 self._writelog('read(%d from %d) -> (%d) %s' % ( |
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138 size, origsize, len(result), result)) |
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139 |
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140 object.__setattr__(self, '_closeafterrecvbytes', remaining) |
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141 |
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142 if remaining <= 0: |
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143 self._writelog('read limit reached, closing socket') |
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144 self._sock.close() |
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145 # This is the easiest way to abort the current request. |
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146 raise Exception('connection closed after receiving N bytes') |
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147 |
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148 return result |
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149 |
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150 def readline(self, size=-1): |
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151 remaining = object.__getattribute__(self, '_closeafterrecvbytes') |
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152 |
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153 # No read limit. Call original function. |
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154 if not remaining: |
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155 result = object.__getattribute__(self, '_orig').readline(size) |
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156 self._writelog('readline(%d) -> (%d) %s' % ( |
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157 size, len(result), result)) |
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158 return result |
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159 |
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160 origsize = size |
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161 |
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162 if size < 0: |
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163 size = remaining |
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164 else: |
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165 size = min(remaining, size) |
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166 |
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167 result = object.__getattribute__(self, '_orig').readline(size) |
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168 remaining -= len(result) |
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169 |
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170 self._writelog('readline(%d from %d) -> (%d) %s' % ( |
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171 size, origsize, len(result), result)) |
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172 |
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173 object.__setattr__(self, '_closeafterrecvbytes', remaining) |
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174 |
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175 if remaining <= 0: |
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176 self._writelog('read limit reached; closing socket') |
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177 self._sock.close() |
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178 # This is the easiest way to abort the current request. |
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179 raise Exception('connection closed after receiving N bytes') |
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180 |
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181 return result |
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182 |
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183 def write(self, data): |
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184 remaining = object.__getattribute__(self, '_closeaftersendbytes') |
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185 |
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186 # No byte limit on this operation. Call original function. |
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187 if not remaining: |
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188 self._writelog('write(%d) -> %s' % (len(data), data)) |
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189 result = object.__getattribute__(self, '_orig').write(data) |
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190 return result |
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191 |
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192 if len(data) > remaining: |
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193 newdata = data[0:remaining] |
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194 else: |
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195 newdata = data |
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196 |
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197 remaining -= len(newdata) |
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198 |
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199 self._writelog('write(%d from %d) -> (%d) %s' % ( |
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200 len(newdata), len(data), remaining, newdata)) |
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201 |
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202 result = object.__getattribute__(self, '_orig').write(newdata) |
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203 |
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204 object.__setattr__(self, '_closeaftersendbytes', remaining) |
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205 |
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206 if remaining <= 0: |
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207 self._writelog('write limit reached; closing socket') |
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208 self._sock.close() |
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209 raise Exception('connection closed after sending N bytes') |
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210 |
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211 return result |
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212 |
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213 def extsetup(ui): |
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214 # Change the base HTTP server class so various events can be performed. |
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215 # See SocketServer.BaseServer for how the specially named methods work. |
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216 class badserver(server.MercurialHTTPServer): |
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217 def __init__(self, ui, *args, **kwargs): |
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218 self._ui = ui |
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219 super(badserver, self).__init__(ui, *args, **kwargs) |
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220 |
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221 # Need to inherit object so super() works. |
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222 class badrequesthandler(self.RequestHandlerClass, object): |
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223 def send_header(self, name, value): |
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224 # Make headers deterministic to facilitate testing. |
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225 if name.lower() == 'date': |
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226 value = 'Fri, 14 Apr 2017 00:00:00 GMT' |
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227 elif name.lower() == 'server': |
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228 value = 'badhttpserver' |
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229 |
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230 return super(badrequesthandler, self).send_header(name, |
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231 value) |
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232 |
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233 self.RequestHandlerClass = badrequesthandler |
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234 |
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235 # Called to accept() a pending socket. |
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236 def get_request(self): |
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237 if self._ui.configbool('badserver', 'closebeforeaccept'): |
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238 self.socket.close() |
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239 |
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240 # Tells the server to stop processing more requests. |
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241 self.__shutdown_request = True |
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242 |
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243 # Simulate failure to stop processing this request. |
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244 raise socket.error('close before accept') |
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245 |
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246 if self._ui.configbool('badserver', 'closeafteraccept'): |
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247 request, client_address = super(badserver, self).get_request() |
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248 request.close() |
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249 raise socket.error('close after accept') |
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250 |
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251 return super(badserver, self).get_request() |
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252 |
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253 # Does heavy lifting of processing a request. Invokes |
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254 # self.finish_request() which calls self.RequestHandlerClass() which |
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255 # is a hgweb.server._httprequesthandler. |
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256 def process_request(self, socket, address): |
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257 # Wrap socket in a proxy if we need to count bytes. |
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258 closeafterrecvbytes = self._ui.configint('badserver', |
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259 'closeafterrecvbytes', 0) |
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260 closeaftersendbytes = self._ui.configint('badserver', |
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261 'closeaftersendbytes', 0) |
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262 |
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263 if closeafterrecvbytes or closeaftersendbytes: |
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264 socket = socketproxy(socket, self.errorlog, |
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265 closeafterrecvbytes=closeafterrecvbytes, |
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266 closeaftersendbytes=closeaftersendbytes) |
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267 |
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268 return super(badserver, self).process_request(socket, address) |
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269 |
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270 server.MercurialHTTPServer = badserver |