Mercurial > hg
annotate mercurial/pycompat.py @ 30887:a95fc01aaffe
commandserver: prevent unlink socket twice
This patch changes unixforkingservice so it only calls
`self._servicehandler.unlinksocket(self.address)` at most once.
This is needed by the next patch.
author | Jun Wu <quark@fb.com> |
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date | Wed, 08 Feb 2017 14:37:38 -0800 |
parents | 6a70cf94d1b5 |
children | 76a64c1e5439 86cd1f2cfff5 |
rev | line source |
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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 getopt |
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14 import os |
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15 import shlex |
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16 import sys |
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17 |
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18 ispy3 = (sys.version_info[0] >= 3) |
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19 |
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20 if not ispy3: |
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21 import cPickle as pickle |
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22 import cStringIO as io |
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23 import httplib |
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24 import Queue as _queue |
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25 import SocketServer as socketserver |
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26 import urlparse |
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27 urlunquote = urlparse.unquote |
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28 import xmlrpclib |
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29 else: |
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30 import http.client as httplib |
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31 import io |
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32 import pickle |
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33 import queue as _queue |
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34 import socketserver |
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35 import urllib.parse as urlparse |
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36 urlunquote = urlparse.unquote_to_bytes |
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37 import xmlrpc.client as xmlrpclib |
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38 |
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39 if ispy3: |
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40 import builtins |
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41 import functools |
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42 fsencode = os.fsencode |
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43 fsdecode = os.fsdecode |
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44 # A bytes version of os.name. |
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45 osname = os.name.encode('ascii') |
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46 ospathsep = os.pathsep.encode('ascii') |
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47 ossep = os.sep.encode('ascii') |
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48 osaltsep = os.altsep |
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49 if osaltsep: |
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50 osaltsep = osaltsep.encode('ascii') |
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51 # os.getcwd() on Python 3 returns string, but it has os.getcwdb() which |
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52 # returns bytes. |
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53 getcwd = os.getcwdb |
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54 sysplatform = sys.platform.encode('ascii') |
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55 sysexecutable = sys.executable |
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56 if sysexecutable: |
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57 sysexecutable = os.fsencode(sysexecutable) |
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58 |
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59 # TODO: .buffer might not exist if std streams were replaced; we'll need |
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60 # a silly wrapper to make a bytes stream backed by a unicode one. |
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61 stdin = sys.stdin.buffer |
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62 stdout = sys.stdout.buffer |
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63 stderr = sys.stderr.buffer |
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64 |
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65 # Since Python 3 converts argv to wchar_t type by Py_DecodeLocale() on Unix, |
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66 # we can use os.fsencode() to get back bytes argv. |
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67 # |
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68 # https://hg.python.org/cpython/file/v3.5.1/Programs/python.c#l55 |
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69 # |
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70 # TODO: On Windows, the native argv is wchar_t, so we'll need a different |
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71 # workaround to simulate the Python 2 (i.e. ANSI Win32 API) behavior. |
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72 sysargv = list(map(os.fsencode, sys.argv)) |
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73 |
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74 def sysstr(s): |
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75 """Return a keyword str to be passed to Python functions such as |
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76 getattr() and str.encode() |
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77 |
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78 This never raises UnicodeDecodeError. Non-ascii characters are |
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79 considered invalid and mapped to arbitrary but unique code points |
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80 such that 'sysstr(a) != sysstr(b)' for all 'a != b'. |
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81 """ |
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82 if isinstance(s, builtins.str): |
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83 return s |
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84 return s.decode(u'latin-1') |
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85 |
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86 def _wrapattrfunc(f): |
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87 @functools.wraps(f) |
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88 def w(object, name, *args): |
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89 return f(object, sysstr(name), *args) |
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90 return w |
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91 |
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92 # these wrappers are automagically imported by hgloader |
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93 delattr = _wrapattrfunc(builtins.delattr) |
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94 getattr = _wrapattrfunc(builtins.getattr) |
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95 hasattr = _wrapattrfunc(builtins.hasattr) |
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96 setattr = _wrapattrfunc(builtins.setattr) |
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97 xrange = builtins.range |
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98 |
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99 # getopt.getopt() on Python 3 deals with unicodes internally so we cannot |
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100 # pass bytes there. Passing unicodes will result in unicodes as return |
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101 # values which we need to convert again to bytes. |
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102 def getoptb(args, shortlist, namelist): |
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103 args = [a.decode('latin-1') for a in args] |
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104 shortlist = shortlist.decode('latin-1') |
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105 namelist = [a.decode('latin-1') for a in namelist] |
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106 opts, args = getopt.getopt(args, shortlist, namelist) |
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107 opts = [(a[0].encode('latin-1'), a[1].encode('latin-1')) |
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108 for a in opts] |
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109 args = [a.encode('latin-1') for a in args] |
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110 return opts, args |
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111 |
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112 # keys of keyword arguments in Python need to be strings which are unicodes |
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113 # Python 3. This function takes keyword arguments, convert the keys to str. |
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114 def strkwargs(dic): |
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115 dic = dict((k.decode('latin-1'), v) for k, v in dic.iteritems()) |
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116 return dic |
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117 |
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118 # keys of keyword arguments need to be unicode while passing into |
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119 # a function. This function helps us to convert those keys back to bytes |
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120 # again as we need to deal with bytes. |
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121 def byteskwargs(dic): |
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122 dic = dict((k.encode('latin-1'), v) for k, v in dic.iteritems()) |
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123 return dic |
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124 |
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125 # shlex.split() accepts unicodes on Python 3. This function takes bytes |
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126 # argument, convert it into unicodes, pass into shlex.split(), convert the |
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127 # returned value to bytes and return that. |
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128 # TODO: handle shlex.shlex(). |
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129 def shlexsplit(s): |
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130 ret = shlex.split(s.decode('latin-1')) |
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131 return [a.encode('latin-1') for a in ret] |
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132 |
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133 else: |
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134 def sysstr(s): |
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135 return s |
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136 |
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137 # Partial backport from os.py in Python 3, which only accepts bytes. |
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138 # In Python 2, our paths should only ever be bytes, a unicode path |
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139 # indicates a bug. |
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140 def fsencode(filename): |
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141 if isinstance(filename, str): |
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142 return filename |
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143 else: |
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144 raise TypeError( |
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145 "expect str, not %s" % type(filename).__name__) |
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146 |
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147 # In Python 2, fsdecode() has a very chance to receive bytes. So it's |
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148 # better not to touch Python 2 part as it's already working fine. |
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149 def fsdecode(filename): |
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150 return filename |
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151 |
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152 def getoptb(args, shortlist, namelist): |
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153 return getopt.getopt(args, shortlist, namelist) |
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154 |
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155 def strkwargs(dic): |
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156 return dic |
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157 |
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158 def byteskwargs(dic): |
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159 return dic |
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160 |
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161 osname = os.name |
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162 ospathsep = os.pathsep |
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163 ossep = os.sep |
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164 osaltsep = os.altsep |
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165 stdin = sys.stdin |
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166 stdout = sys.stdout |
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167 stderr = sys.stderr |
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168 sysargv = sys.argv |
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169 sysplatform = sys.platform |
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170 getcwd = os.getcwd |
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171 sysexecutable = sys.executable |
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172 shlexsplit = shlex.split |
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173 |
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174 stringio = io.StringIO |
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175 empty = _queue.Empty |
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176 queue = _queue.Queue |
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177 |
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178 class _pycompatstub(object): |
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179 def __init__(self): |
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180 self._aliases = {} |
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181 |
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182 def _registeraliases(self, origin, items): |
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183 """Add items that will be populated at the first access""" |
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184 items = map(sysstr, items) |
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185 self._aliases.update( |
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186 (item.replace(sysstr('_'), sysstr('')).lower(), (origin, item)) |
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187 for item in items) |
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188 |
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189 def __getattr__(self, name): |
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190 try: |
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191 origin, item = self._aliases[name] |
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192 except KeyError: |
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193 raise AttributeError(name) |
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194 self.__dict__[name] = obj = getattr(origin, item) |
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195 return obj |
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196 |
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197 httpserver = _pycompatstub() |
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198 urlreq = _pycompatstub() |
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199 urlerr = _pycompatstub() |
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200 if not ispy3: |
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201 import BaseHTTPServer |
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202 import CGIHTTPServer |
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203 import SimpleHTTPServer |
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204 import urllib2 |
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205 import urllib |
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206 urlreq._registeraliases(urllib, ( |
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207 "addclosehook", |
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208 "addinfourl", |
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209 "ftpwrapper", |
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210 "pathname2url", |
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211 "quote", |
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212 "splitattr", |
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213 "splitpasswd", |
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214 "splitport", |
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215 "splituser", |
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216 "unquote", |
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217 "url2pathname", |
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218 "urlencode", |
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219 )) |
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220 urlreq._registeraliases(urllib2, ( |
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221 "AbstractHTTPHandler", |
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222 "BaseHandler", |
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223 "build_opener", |
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224 "FileHandler", |
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225 "FTPHandler", |
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226 "HTTPBasicAuthHandler", |
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227 "HTTPDigestAuthHandler", |
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228 "HTTPHandler", |
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229 "HTTPPasswordMgrWithDefaultRealm", |
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230 "HTTPSHandler", |
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231 "install_opener", |
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232 "ProxyHandler", |
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233 "Request", |
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234 "urlopen", |
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235 )) |
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236 urlerr._registeraliases(urllib2, ( |
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237 "HTTPError", |
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238 "URLError", |
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239 )) |
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240 httpserver._registeraliases(BaseHTTPServer, ( |
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241 "HTTPServer", |
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242 "BaseHTTPRequestHandler", |
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243 )) |
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244 httpserver._registeraliases(SimpleHTTPServer, ( |
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245 "SimpleHTTPRequestHandler", |
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246 )) |
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247 httpserver._registeraliases(CGIHTTPServer, ( |
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248 "CGIHTTPRequestHandler", |
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249 )) |
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250 |
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251 else: |
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252 import urllib.request |
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253 urlreq._registeraliases(urllib.request, ( |
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254 "AbstractHTTPHandler", |
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255 "addclosehook", |
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256 "addinfourl", |
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257 "BaseHandler", |
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258 "build_opener", |
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259 "FileHandler", |
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260 "FTPHandler", |
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261 "ftpwrapper", |
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262 "HTTPHandler", |
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263 "HTTPSHandler", |
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264 "install_opener", |
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265 "pathname2url", |
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266 "HTTPBasicAuthHandler", |
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267 "HTTPDigestAuthHandler", |
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268 "HTTPPasswordMgrWithDefaultRealm", |
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269 "ProxyHandler", |
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270 "quote", |
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271 "Request", |
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272 "splitattr", |
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273 "splitpasswd", |
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274 "splitport", |
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275 "splituser", |
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276 "unquote", |
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277 "url2pathname", |
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278 "urlopen", |
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279 )) |
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280 import urllib.error |
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281 urlerr._registeraliases(urllib.error, ( |
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282 "HTTPError", |
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283 "URLError", |
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284 )) |
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285 import http.server |
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286 httpserver._registeraliases(http.server, ( |
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287 "HTTPServer", |
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288 "BaseHTTPRequestHandler", |
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289 "SimpleHTTPRequestHandler", |
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290 "CGIHTTPRequestHandler", |
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291 )) |