Mercurial > hg
annotate mercurial/pycompat.py @ 33039:b82615afde65
bundle: add a applybundle1() method
This is one step towards removing a bunch of "if isinstance(gen,
unbundle20)" by treating bundle1 and bundle2 more similarly.
The name may sounds ironic for a method in the bundle2 module, but I
didn't think it was worth it yet to create a new 'bundle' module that
depends on the 'bundle2' module. Besides, we'll inline the method
again later.
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Fri, 16 Jun 2017 10:25:11 -0700 |
parents | 6e38b4212661 |
children | 524b13fc711f |
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 cookielib |
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22 import cPickle as pickle |
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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 xmlrpclib |
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27 else: |
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28 import http.cookiejar as cookielib |
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29 import http.client as httplib |
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30 import pickle |
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31 import queue as _queue |
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32 import socketserver |
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33 import xmlrpc.client as xmlrpclib |
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34 |
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35 empty = _queue.Empty |
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36 queue = _queue.Queue |
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37 |
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38 def identity(a): |
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39 return a |
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40 |
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41 if ispy3: |
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42 import builtins |
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43 import functools |
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44 import io |
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45 import struct |
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46 |
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47 fsencode = os.fsencode |
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48 fsdecode = os.fsdecode |
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49 oslinesep = os.linesep.encode('ascii') |
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50 osname = os.name.encode('ascii') |
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51 ospathsep = os.pathsep.encode('ascii') |
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52 ossep = os.sep.encode('ascii') |
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53 osaltsep = os.altsep |
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54 if osaltsep: |
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55 osaltsep = osaltsep.encode('ascii') |
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56 # os.getcwd() on Python 3 returns string, but it has os.getcwdb() which |
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57 # returns bytes. |
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58 getcwd = os.getcwdb |
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59 sysplatform = sys.platform.encode('ascii') |
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60 sysexecutable = sys.executable |
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61 if sysexecutable: |
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62 sysexecutable = os.fsencode(sysexecutable) |
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63 stringio = io.BytesIO |
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64 maplist = lambda *args: list(map(*args)) |
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65 |
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66 # TODO: .buffer might not exist if std streams were replaced; we'll need |
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67 # a silly wrapper to make a bytes stream backed by a unicode one. |
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68 stdin = sys.stdin.buffer |
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69 stdout = sys.stdout.buffer |
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70 stderr = sys.stderr.buffer |
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71 |
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72 # Since Python 3 converts argv to wchar_t type by Py_DecodeLocale() on Unix, |
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73 # we can use os.fsencode() to get back bytes argv. |
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74 # |
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75 # https://hg.python.org/cpython/file/v3.5.1/Programs/python.c#l55 |
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76 # |
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77 # TODO: On Windows, the native argv is wchar_t, so we'll need a different |
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78 # workaround to simulate the Python 2 (i.e. ANSI Win32 API) behavior. |
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79 if getattr(sys, 'argv', None) is not None: |
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80 sysargv = list(map(os.fsencode, sys.argv)) |
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81 |
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82 bytechr = struct.Struct('>B').pack |
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83 |
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84 class bytestr(bytes): |
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85 """A bytes which mostly acts as a Python 2 str |
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86 |
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87 >>> bytestr(), bytestr(bytearray(b'foo')), bytestr(u'ascii'), bytestr(1) |
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88 (b'', b'foo', b'ascii', b'1') |
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89 >>> s = bytestr(b'foo') |
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90 >>> assert s is bytestr(s) |
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91 |
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92 __bytes__() should be called if provided: |
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93 |
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94 >>> class bytesable(object): |
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95 ... def __bytes__(self): |
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96 ... return b'bytes' |
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97 >>> bytestr(bytesable()) |
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98 b'bytes' |
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99 |
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100 There's no implicit conversion from non-ascii str as its encoding is |
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101 unknown: |
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102 |
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103 >>> bytestr(chr(0x80)) # doctest: +ELLIPSIS |
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104 Traceback (most recent call last): |
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105 ... |
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106 UnicodeEncodeError: ... |
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107 |
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108 Comparison between bytestr and bytes should work: |
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109 |
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110 >>> assert bytestr(b'foo') == b'foo' |
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111 >>> assert b'foo' == bytestr(b'foo') |
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112 >>> assert b'f' in bytestr(b'foo') |
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113 >>> assert bytestr(b'f') in b'foo' |
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114 |
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115 Sliced elements should be bytes, not integer: |
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116 |
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117 >>> s[1], s[:2] |
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118 (b'o', b'fo') |
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119 >>> list(s), list(reversed(s)) |
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120 ([b'f', b'o', b'o'], [b'o', b'o', b'f']) |
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121 |
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122 As bytestr type isn't propagated across operations, you need to cast |
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123 bytes to bytestr explicitly: |
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124 |
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125 >>> s = bytestr(b'foo').upper() |
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126 >>> t = bytestr(s) |
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127 >>> s[0], t[0] |
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128 (70, b'F') |
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129 |
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130 Be careful to not pass a bytestr object to a function which expects |
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131 bytearray-like behavior. |
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132 |
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133 >>> t = bytes(t) # cast to bytes |
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134 >>> assert type(t) is bytes |
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135 """ |
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136 |
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137 def __new__(cls, s=b''): |
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138 if isinstance(s, bytestr): |
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139 return s |
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140 if (not isinstance(s, (bytes, bytearray)) |
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141 and not hasattr(s, u'__bytes__')): # hasattr-py3-only |
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142 s = str(s).encode(u'ascii') |
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143 return bytes.__new__(cls, s) |
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144 |
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145 def __getitem__(self, key): |
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146 s = bytes.__getitem__(self, key) |
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147 if not isinstance(s, bytes): |
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148 s = bytechr(s) |
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149 return s |
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150 |
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151 def __iter__(self): |
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152 return iterbytestr(bytes.__iter__(self)) |
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153 |
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154 def iterbytestr(s): |
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155 """Iterate bytes as if it were a str object of Python 2""" |
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156 return map(bytechr, s) |
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157 |
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158 def sysbytes(s): |
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159 """Convert an internal str (e.g. keyword, __doc__) back to bytes |
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160 |
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161 This never raises UnicodeEncodeError, but only ASCII characters |
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162 can be round-trip by sysstr(sysbytes(s)). |
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163 """ |
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164 return s.encode(u'utf-8') |
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165 |
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166 def sysstr(s): |
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167 """Return a keyword str to be passed to Python functions such as |
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168 getattr() and str.encode() |
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169 |
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170 This never raises UnicodeDecodeError. Non-ascii characters are |
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171 considered invalid and mapped to arbitrary but unique code points |
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172 such that 'sysstr(a) != sysstr(b)' for all 'a != b'. |
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173 """ |
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174 if isinstance(s, builtins.str): |
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175 return s |
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176 return s.decode(u'latin-1') |
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177 |
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178 def strurl(url): |
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179 """Converts a bytes url back to str""" |
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180 return url.decode(u'ascii') |
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181 |
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182 def bytesurl(url): |
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183 """Converts a str url to bytes by encoding in ascii""" |
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184 return url.encode(u'ascii') |
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185 |
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186 def raisewithtb(exc, tb): |
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187 """Raise exception with the given traceback""" |
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188 raise exc.with_traceback(tb) |
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189 |
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190 def getdoc(obj): |
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191 """Get docstring as bytes; may be None so gettext() won't confuse it |
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192 with _('')""" |
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193 doc = getattr(obj, u'__doc__', None) |
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194 if doc is None: |
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195 return doc |
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196 return sysbytes(doc) |
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197 |
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198 def _wrapattrfunc(f): |
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199 @functools.wraps(f) |
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200 def w(object, name, *args): |
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201 return f(object, sysstr(name), *args) |
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202 return w |
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203 |
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204 # these wrappers are automagically imported by hgloader |
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205 delattr = _wrapattrfunc(builtins.delattr) |
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206 getattr = _wrapattrfunc(builtins.getattr) |
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207 hasattr = _wrapattrfunc(builtins.hasattr) |
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208 setattr = _wrapattrfunc(builtins.setattr) |
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209 xrange = builtins.range |
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210 unicode = str |
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211 |
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212 def open(name, mode='r', buffering=-1): |
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213 return builtins.open(name, sysstr(mode), buffering) |
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214 |
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215 def getoptb(args, shortlist, namelist): |
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216 """ |
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217 Takes bytes arguments, converts them to unicode, pass them to |
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218 getopt.getopt(), convert the returned values back to bytes and then |
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219 return them for Python 3 compatibility as getopt.getopt() don't accepts |
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220 bytes on Python 3. |
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221 """ |
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222 args = [a.decode('latin-1') for a in args] |
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223 shortlist = shortlist.decode('latin-1') |
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224 namelist = [a.decode('latin-1') for a in namelist] |
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225 opts, args = getopt.getopt(args, shortlist, namelist) |
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226 opts = [(a[0].encode('latin-1'), a[1].encode('latin-1')) |
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227 for a in opts] |
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228 args = [a.encode('latin-1') for a in args] |
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229 return opts, args |
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230 |
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231 def strkwargs(dic): |
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232 """ |
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233 Converts the keys of a python dictonary to str i.e. unicodes so that |
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234 they can be passed as keyword arguments as dictonaries with bytes keys |
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235 can't be passed as keyword arguments to functions on Python 3. |
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236 """ |
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237 dic = dict((k.decode('latin-1'), v) for k, v in dic.iteritems()) |
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238 return dic |
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239 |
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240 def byteskwargs(dic): |
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241 """ |
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242 Converts keys of python dictonaries to bytes as they were converted to |
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243 str to pass that dictonary as a keyword argument on Python 3. |
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244 """ |
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245 dic = dict((k.encode('latin-1'), v) for k, v in dic.iteritems()) |
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246 return dic |
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247 |
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248 # TODO: handle shlex.shlex(). |
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249 def shlexsplit(s): |
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250 """ |
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251 Takes bytes argument, convert it to str i.e. unicodes, pass that into |
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252 shlex.split(), convert the returned value to bytes and return that for |
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253 Python 3 compatibility as shelx.split() don't accept bytes on Python 3. |
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254 """ |
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255 ret = shlex.split(s.decode('latin-1')) |
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256 return [a.encode('latin-1') for a in ret] |
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257 |
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258 else: |
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259 import cStringIO |
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260 |
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261 bytechr = chr |
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262 bytestr = str |
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263 iterbytestr = iter |
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264 sysbytes = identity |
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265 sysstr = identity |
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266 strurl = identity |
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267 bytesurl = identity |
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268 |
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269 # this can't be parsed on Python 3 |
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270 exec('def raisewithtb(exc, tb):\n' |
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271 ' raise exc, None, tb\n') |
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272 |
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273 def fsencode(filename): |
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274 """ |
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275 Partial backport from os.py in Python 3, which only accepts bytes. |
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276 In Python 2, our paths should only ever be bytes, a unicode path |
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277 indicates a bug. |
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278 """ |
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279 if isinstance(filename, str): |
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280 return filename |
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281 else: |
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282 raise TypeError( |
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283 "expect str, not %s" % type(filename).__name__) |
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284 |
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285 # In Python 2, fsdecode() has a very chance to receive bytes. So it's |
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286 # better not to touch Python 2 part as it's already working fine. |
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287 fsdecode = identity |
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288 |
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289 def getdoc(obj): |
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290 return getattr(obj, '__doc__', None) |
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291 |
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292 def getoptb(args, shortlist, namelist): |
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293 return getopt.getopt(args, shortlist, namelist) |
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294 |
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295 strkwargs = identity |
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296 byteskwargs = identity |
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297 |
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298 oslinesep = os.linesep |
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299 osname = os.name |
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300 ospathsep = os.pathsep |
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301 ossep = os.sep |
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302 osaltsep = os.altsep |
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303 stdin = sys.stdin |
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304 stdout = sys.stdout |
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305 stderr = sys.stderr |
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306 if getattr(sys, 'argv', None) is not None: |
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307 sysargv = sys.argv |
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308 sysplatform = sys.platform |
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309 getcwd = os.getcwd |
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310 sysexecutable = sys.executable |
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311 shlexsplit = shlex.split |
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312 stringio = cStringIO.StringIO |
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313 maplist = map |
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314 |
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315 class _pycompatstub(object): |
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316 def __init__(self): |
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317 self._aliases = {} |
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318 |
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319 def _registeraliases(self, origin, items): |
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320 """Add items that will be populated at the first access""" |
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321 items = map(sysstr, items) |
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322 self._aliases.update( |
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323 (item.replace(sysstr('_'), sysstr('')).lower(), (origin, item)) |
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324 for item in items) |
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325 |
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326 def _registeralias(self, origin, attr, name): |
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327 """Alias ``origin``.``attr`` as ``name``""" |
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328 self._aliases[sysstr(name)] = (origin, sysstr(attr)) |
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329 |
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330 def __getattr__(self, name): |
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331 try: |
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332 origin, item = self._aliases[name] |
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333 except KeyError: |
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334 raise AttributeError(name) |
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335 self.__dict__[name] = obj = getattr(origin, item) |
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336 return obj |
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337 |
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338 httpserver = _pycompatstub() |
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339 urlreq = _pycompatstub() |
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340 urlerr = _pycompatstub() |
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341 if not ispy3: |
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342 import BaseHTTPServer |
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343 import CGIHTTPServer |
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344 import SimpleHTTPServer |
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345 import urllib2 |
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346 import urllib |
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347 import urlparse |
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348 urlreq._registeraliases(urllib, ( |
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349 "addclosehook", |
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350 "addinfourl", |
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351 "ftpwrapper", |
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352 "pathname2url", |
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353 "quote", |
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354 "splitattr", |
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355 "splitpasswd", |
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356 "splitport", |
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357 "splituser", |
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358 "unquote", |
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359 "url2pathname", |
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360 "urlencode", |
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361 )) |
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362 urlreq._registeraliases(urllib2, ( |
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363 "AbstractHTTPHandler", |
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364 "BaseHandler", |
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365 "build_opener", |
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366 "FileHandler", |
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367 "FTPHandler", |
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368 "HTTPBasicAuthHandler", |
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369 "HTTPDigestAuthHandler", |
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370 "HTTPHandler", |
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371 "HTTPPasswordMgrWithDefaultRealm", |
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372 "HTTPSHandler", |
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373 "install_opener", |
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374 "ProxyHandler", |
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375 "Request", |
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376 "urlopen", |
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377 )) |
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378 urlreq._registeraliases(urlparse, ( |
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379 "urlparse", |
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380 "urlunparse", |
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381 )) |
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382 urlerr._registeraliases(urllib2, ( |
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383 "HTTPError", |
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384 "URLError", |
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385 )) |
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386 httpserver._registeraliases(BaseHTTPServer, ( |
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387 "HTTPServer", |
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388 "BaseHTTPRequestHandler", |
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389 )) |
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390 httpserver._registeraliases(SimpleHTTPServer, ( |
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391 "SimpleHTTPRequestHandler", |
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392 )) |
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393 httpserver._registeraliases(CGIHTTPServer, ( |
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394 "CGIHTTPRequestHandler", |
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395 )) |
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396 |
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397 else: |
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398 import urllib.parse |
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399 urlreq._registeraliases(urllib.parse, ( |
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400 "splitattr", |
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401 "splitpasswd", |
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402 "splitport", |
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403 "splituser", |
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404 "urlparse", |
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405 "urlunparse", |
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406 )) |
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407 urlreq._registeralias(urllib.parse, "unquote_to_bytes", "unquote") |
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408 import urllib.request |
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409 urlreq._registeraliases(urllib.request, ( |
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410 "AbstractHTTPHandler", |
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411 "BaseHandler", |
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412 "build_opener", |
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413 "FileHandler", |
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414 "FTPHandler", |
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415 "ftpwrapper", |
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416 "HTTPHandler", |
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417 "HTTPSHandler", |
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418 "install_opener", |
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419 "pathname2url", |
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420 "HTTPBasicAuthHandler", |
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421 "HTTPDigestAuthHandler", |
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422 "HTTPPasswordMgrWithDefaultRealm", |
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423 "ProxyHandler", |
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424 "Request", |
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425 "url2pathname", |
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426 "urlopen", |
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427 )) |
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428 import urllib.response |
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429 urlreq._registeraliases(urllib.response, ( |
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430 "addclosehook", |
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431 "addinfourl", |
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432 )) |
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433 import urllib.error |
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434 urlerr._registeraliases(urllib.error, ( |
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435 "HTTPError", |
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436 "URLError", |
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437 )) |
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438 import http.server |
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439 httpserver._registeraliases(http.server, ( |
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440 "HTTPServer", |
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441 "BaseHTTPRequestHandler", |
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442 "SimpleHTTPRequestHandler", |
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443 "CGIHTTPRequestHandler", |
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444 )) |
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445 |
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pycompat: custom implementation of urllib.parse.quote()
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parents:
31399
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changeset
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446 # urllib.parse.quote() accepts both str and bytes, decodes bytes |
fb1f70331ee6
pycompat: custom implementation of urllib.parse.quote()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31399
diff
changeset
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447 # (if necessary), and returns str. This is wonky. We provide a custom |
fb1f70331ee6
pycompat: custom implementation of urllib.parse.quote()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31399
diff
changeset
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448 # implementation that only accepts bytes and emits bytes. |
fb1f70331ee6
pycompat: custom implementation of urllib.parse.quote()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31399
diff
changeset
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449 def quote(s, safe=r'/'): |
fb1f70331ee6
pycompat: custom implementation of urllib.parse.quote()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31399
diff
changeset
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450 s = urllib.parse.quote_from_bytes(s, safe=safe) |
fb1f70331ee6
pycompat: custom implementation of urllib.parse.quote()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31399
diff
changeset
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451 return s.encode('ascii', 'strict') |
fb1f70331ee6
pycompat: custom implementation of urllib.parse.quote()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31399
diff
changeset
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452 |
31842
c130d092042a
py3: add a bytes version of urllib.parse.urlencode() to pycompat.py
Pulkit Goyal <7895pulkit@gmail.com>
parents:
31820
diff
changeset
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453 # urllib.parse.urlencode() returns str. We use this function to make |
c130d092042a
py3: add a bytes version of urllib.parse.urlencode() to pycompat.py
Pulkit Goyal <7895pulkit@gmail.com>
parents:
31820
diff
changeset
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454 # sure we return bytes. |
c130d092042a
py3: add a bytes version of urllib.parse.urlencode() to pycompat.py
Pulkit Goyal <7895pulkit@gmail.com>
parents:
31820
diff
changeset
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455 def urlencode(query, doseq=False): |
c130d092042a
py3: add a bytes version of urllib.parse.urlencode() to pycompat.py
Pulkit Goyal <7895pulkit@gmail.com>
parents:
31820
diff
changeset
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456 s = urllib.parse.urlencode(query, doseq=doseq) |
c130d092042a
py3: add a bytes version of urllib.parse.urlencode() to pycompat.py
Pulkit Goyal <7895pulkit@gmail.com>
parents:
31820
diff
changeset
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457 return s.encode('ascii') |
c130d092042a
py3: add a bytes version of urllib.parse.urlencode() to pycompat.py
Pulkit Goyal <7895pulkit@gmail.com>
parents:
31820
diff
changeset
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458 |
31400
fb1f70331ee6
pycompat: custom implementation of urllib.parse.quote()
Gregory Szorc <gregory.szorc@gmail.com>
parents:
31399
diff
changeset
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459 urlreq.quote = quote |
31842
c130d092042a
py3: add a bytes version of urllib.parse.urlencode() to pycompat.py
Pulkit Goyal <7895pulkit@gmail.com>
parents:
31820
diff
changeset
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460 urlreq.urlencode = urlencode |