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annotate mercurial/pycompat.py @ 30119:f4a5e0e86a7e

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py3: add an os.fsencode backport to ease path handling
author Martijn Pieters <mjpieters@fb.com>
date Sun, 09 Oct 2016 17:44:23 +0200
parents f3a1089654e3
children f6dcda7505f9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # pycompat.py - portability shim for python 3
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2 #
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3 # This software may be used and distributed according to the terms of the
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4 # GNU General Public License version 2 or any later version.
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5
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6 """Mercurial portability shim for python 3.
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7
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8 This contains aliases to hide python version-specific details from the core.
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9 """
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10
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11 from __future__ import absolute_import
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12
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13 import sys
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14
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15 ispy3 = (sys.version_info[0] >= 3)
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16
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17 if not ispy3:
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18 import cPickle as pickle
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19 import cStringIO as io
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20 import httplib
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21 import Queue as _queue
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22 import SocketServer as socketserver
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23 import urlparse
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24 import xmlrpclib
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25 else:
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26 import http.client as httplib
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27 import io
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28 import pickle
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29 import queue as _queue
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30 import socketserver
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31 import urllib.parse as urlparse
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32 import xmlrpc.client as xmlrpclib
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33
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34 if ispy3:
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35 import builtins
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36 import functools
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37 import os
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38 fsencode = os.fsencode
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39
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40 def sysstr(s):
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41 """Return a keyword str to be passed to Python functions such as
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42 getattr() and str.encode()
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43
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44 This never raises UnicodeDecodeError. Non-ascii characters are
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45 considered invalid and mapped to arbitrary but unique code points
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46 such that 'sysstr(a) != sysstr(b)' for all 'a != b'.
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47 """
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48 if isinstance(s, builtins.str):
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49 return s
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50 return s.decode(u'latin-1')
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51
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52 def _wrapattrfunc(f):
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53 @functools.wraps(f)
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54 def w(object, name, *args):
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55 return f(object, sysstr(name), *args)
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56 return w
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57
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58 # these wrappers are automagically imported by hgloader
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59 delattr = _wrapattrfunc(builtins.delattr)
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60 getattr = _wrapattrfunc(builtins.getattr)
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61 hasattr = _wrapattrfunc(builtins.hasattr)
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62 setattr = _wrapattrfunc(builtins.setattr)
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63 xrange = builtins.range
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64
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65 else:
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66 def sysstr(s):
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67 return s
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68
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69 # Partial backport from os.py in Python 3
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70 def _fscodec():
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71 encoding = sys.getfilesystemencoding()
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72 if encoding == 'mbcs':
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73 errors = 'strict'
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74 else:
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75 errors = 'surrogateescape'
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76
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77 def fsencode(filename):
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78 """
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79 Encode filename to the filesystem encoding with 'surrogateescape'
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80 error handler, return bytes unchanged. On Windows, use 'strict'
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81 error handler if the file system encoding is 'mbcs' (which is the
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82 default encoding).
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83 """
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84 if isinstance(filename, str):
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85 return filename
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86 elif isinstance(filename, unicode):
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87 return filename.encode(encoding, errors)
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88 else:
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89 raise TypeError(
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90 "expect str or unicode, not %s" % type(filename).__name__)
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91
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92 return fsencode
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93
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94 fsencode = _fscodec()
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95 del _fscodec
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96
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97 stringio = io.StringIO
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98 empty = _queue.Empty
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99 queue = _queue.Queue
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100
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101 class _pycompatstub(object):
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102 def __init__(self):
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103 self._aliases = {}
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104
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105 def _registeraliases(self, origin, items):
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106 """Add items that will be populated at the first access"""
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107 items = map(sysstr, items)
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108 self._aliases.update(
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109 (item.replace(sysstr('_'), sysstr('')).lower(), (origin, item))
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110 for item in items)
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111
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112 def __getattr__(self, name):
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113 try:
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114 origin, item = self._aliases[name]
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115 except KeyError:
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116 raise AttributeError(name)
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117 self.__dict__[name] = obj = getattr(origin, item)
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118 return obj
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119
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120 httpserver = _pycompatstub()
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121 urlreq = _pycompatstub()
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122 urlerr = _pycompatstub()
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123 if not ispy3:
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124 import BaseHTTPServer
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125 import CGIHTTPServer
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126 import SimpleHTTPServer
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127 import urllib2
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128 import urllib
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129 urlreq._registeraliases(urllib, (
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130 "addclosehook",
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131 "addinfourl",
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timeless <timeless@mozdev.org>
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132 "ftpwrapper",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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133 "pathname2url",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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134 "quote",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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135 "splitattr",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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136 "splitpasswd",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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137 "splitport",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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138 "splituser",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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139 "unquote",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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140 "url2pathname",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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141 "urlencode",
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timeless <timeless@mozdev.org>
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142 ))
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143 urlreq._registeraliases(urllib2, (
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timeless <timeless@mozdev.org>
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144 "AbstractHTTPHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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145 "BaseHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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146 "build_opener",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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147 "FileHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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148 "FTPHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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149 "HTTPBasicAuthHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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150 "HTTPDigestAuthHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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151 "HTTPHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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152 "HTTPPasswordMgrWithDefaultRealm",
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timeless <timeless@mozdev.org>
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153 "HTTPSHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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154 "install_opener",
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timeless <timeless@mozdev.org>
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155 "ProxyHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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156 "Request",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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157 "urlopen",
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timeless <timeless@mozdev.org>
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158 ))
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159 urlerr._registeraliases(urllib2, (
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160 "HTTPError",
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timeless <timeless@mozdev.org>
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161 "URLError",
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timeless <timeless@mozdev.org>
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162 ))
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163 httpserver._registeraliases(BaseHTTPServer, (
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164 "HTTPServer",
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165 "BaseHTTPRequestHandler",
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166 ))
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167 httpserver._registeraliases(SimpleHTTPServer, (
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168 "SimpleHTTPRequestHandler",
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169 ))
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170 httpserver._registeraliases(CGIHTTPServer, (
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171 "CGIHTTPRequestHandler",
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172 ))
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timeless <timeless@mozdev.org>
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173
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174 else:
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175 import urllib.request
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176 urlreq._registeraliases(urllib.request, (
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timeless <timeless@mozdev.org>
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177 "AbstractHTTPHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
diff changeset
178 "addclosehook",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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179 "addinfourl",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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180 "BaseHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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181 "build_opener",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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182 "FileHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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183 "FTPHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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184 "ftpwrapper",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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185 "HTTPHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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186 "HTTPSHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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187 "install_opener",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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188 "pathname2url",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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189 "HTTPBasicAuthHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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190 "HTTPDigestAuthHandler",
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Gregory Szorc <gregory.szorc@gmail.com>
parents: 29405
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191 "HTTPPasswordMgrWithDefaultRealm",
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timeless <timeless@mozdev.org>
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192 "ProxyHandler",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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193 "quote",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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194 "Request",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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195 "splitattr",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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196 "splitpasswd",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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197 "splitport",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
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198 "splituser",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
diff changeset
199 "unquote",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
diff changeset
200 "url2pathname",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
diff changeset
201 "urlopen",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
parents: 28835
diff changeset
202 ))
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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203 import urllib.error
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204 urlerr._registeraliases(urllib.error, (
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timeless <timeless@mozdev.org>
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205 "HTTPError",
800ec7c048b0 pycompat: add util.urlerr util.urlreq classes for py3 compat
timeless <timeless@mozdev.org>
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206 "URLError",
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timeless <timeless@mozdev.org>
parents: 28835
diff changeset
207 ))
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208 import http.server
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209 httpserver._registeraliases(http.server, (
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210 "HTTPServer",
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211 "BaseHTTPRequestHandler",
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Pulkit Goyal <7895pulkit@gmail.com>
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212 "SimpleHTTPRequestHandler",
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Pulkit Goyal <7895pulkit@gmail.com>
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213 "CGIHTTPRequestHandler",
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Pulkit Goyal <7895pulkit@gmail.com>
parents: 29455
diff changeset
214 ))