Mercurial > hg
annotate mercurial/pycompat.py @ 31758:04ec317b8128
hgweb: expose a followlines UI in filerevision view
In filerevision view (/file/<rev>/<fname>) we add some event listeners on
mouse clicks of <span> elements in the <pre class="sourcelines"> block.
Those listeners will capture a range of lines selected between two mouse
clicks and a box inviting to follow the history of selected lines will then
show up. Selected lines (i.e. the block of lines) get a CSS class which make
them highlighted. Selection can be cancelled (and restarted) by either
clicking on the cancel ("x") button in the invite box or clicking on any other
source line. Also clicking twice on the same line will abort the selection and
reset event listeners to restart the process.
As a first step, this action is only advertised by the "cursor: cell" CSS rule
on source lines elements as any other mechanisms would make the code
significantly more complicated. This might be improved later.
All JavaScript code lives in a new "linerangelog.js" file, sourced in
filerevision template (only in "paper" style for now).
author | Denis Laxalde <denis.laxalde@logilab.fr> |
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date | Wed, 29 Mar 2017 22:26:16 +0200 |
parents | 55c6788c54e2 |
children | 7d2cbe11ae48 |
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 httplib |
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23 import Queue as _queue |
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24 import SocketServer as socketserver |
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25 import xmlrpclib |
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26 else: |
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27 import http.client as httplib |
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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 xmlrpc.client as xmlrpclib |
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32 |
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33 if ispy3: |
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34 import builtins |
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35 import functools |
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36 import io |
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37 import struct |
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38 |
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39 fsencode = os.fsencode |
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40 fsdecode = os.fsdecode |
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41 # A bytes version of os.name. |
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42 osname = os.name.encode('ascii') |
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43 ospathsep = os.pathsep.encode('ascii') |
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44 ossep = os.sep.encode('ascii') |
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45 osaltsep = os.altsep |
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46 if osaltsep: |
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47 osaltsep = osaltsep.encode('ascii') |
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48 # os.getcwd() on Python 3 returns string, but it has os.getcwdb() which |
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49 # returns bytes. |
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50 getcwd = os.getcwdb |
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51 sysplatform = sys.platform.encode('ascii') |
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52 sysexecutable = sys.executable |
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53 if sysexecutable: |
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54 sysexecutable = os.fsencode(sysexecutable) |
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55 stringio = io.BytesIO |
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56 maplist = lambda *args: list(map(*args)) |
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57 |
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58 # TODO: .buffer might not exist if std streams were replaced; we'll need |
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59 # a silly wrapper to make a bytes stream backed by a unicode one. |
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60 stdin = sys.stdin.buffer |
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61 stdout = sys.stdout.buffer |
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62 stderr = sys.stderr.buffer |
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63 |
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64 # Since Python 3 converts argv to wchar_t type by Py_DecodeLocale() on Unix, |
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65 # we can use os.fsencode() to get back bytes argv. |
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66 # |
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67 # https://hg.python.org/cpython/file/v3.5.1/Programs/python.c#l55 |
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68 # |
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69 # TODO: On Windows, the native argv is wchar_t, so we'll need a different |
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70 # workaround to simulate the Python 2 (i.e. ANSI Win32 API) behavior. |
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71 if getattr(sys, 'argv', None) is not None: |
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72 sysargv = list(map(os.fsencode, sys.argv)) |
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73 |
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74 bytechr = struct.Struct('>B').pack |
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75 |
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76 class bytestr(bytes): |
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77 """A bytes which mostly acts as a Python 2 str |
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78 |
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79 >>> bytestr(), bytestr(bytearray(b'foo')), bytestr(u'ascii'), bytestr(1) |
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80 (b'', b'foo', b'ascii', b'1') |
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81 >>> s = bytestr(b'foo') |
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82 >>> assert s is bytestr(s) |
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83 |
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84 There's no implicit conversion from non-ascii str as its encoding is |
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85 unknown: |
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86 |
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87 >>> bytestr(chr(0x80)) # doctest: +ELLIPSIS |
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88 Traceback (most recent call last): |
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89 ... |
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90 UnicodeEncodeError: ... |
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91 |
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92 Comparison between bytestr and bytes should work: |
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93 |
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94 >>> assert bytestr(b'foo') == b'foo' |
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95 >>> assert b'foo' == bytestr(b'foo') |
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96 >>> assert b'f' in bytestr(b'foo') |
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97 >>> assert bytestr(b'f') in b'foo' |
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98 |
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99 Sliced elements should be bytes, not integer: |
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100 |
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101 >>> s[1], s[:2] |
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102 (b'o', b'fo') |
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103 >>> list(s), list(reversed(s)) |
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104 ([b'f', b'o', b'o'], [b'o', b'o', b'f']) |
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105 |
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106 As bytestr type isn't propagated across operations, you need to cast |
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107 bytes to bytestr explicitly: |
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108 |
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109 >>> s = bytestr(b'foo').upper() |
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110 >>> t = bytestr(s) |
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111 >>> s[0], t[0] |
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112 (70, b'F') |
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113 |
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114 Be careful to not pass a bytestr object to a function which expects |
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115 bytearray-like behavior. |
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116 |
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117 >>> t = bytes(t) # cast to bytes |
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118 >>> assert type(t) is bytes |
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119 """ |
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120 |
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121 def __new__(cls, s=b''): |
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122 if isinstance(s, bytestr): |
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123 return s |
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124 if not isinstance(s, (bytes, bytearray)): |
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125 s = str(s).encode(u'ascii') |
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126 return bytes.__new__(cls, s) |
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127 |
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128 def __getitem__(self, key): |
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129 s = bytes.__getitem__(self, key) |
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130 if not isinstance(s, bytes): |
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131 s = bytechr(s) |
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132 return s |
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133 |
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134 def __iter__(self): |
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135 return iterbytestr(bytes.__iter__(self)) |
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136 |
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137 def iterbytestr(s): |
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138 """Iterate bytes as if it were a str object of Python 2""" |
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139 return map(bytechr, s) |
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140 |
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141 def sysstr(s): |
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142 """Return a keyword str to be passed to Python functions such as |
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143 getattr() and str.encode() |
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144 |
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145 This never raises UnicodeDecodeError. Non-ascii characters are |
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146 considered invalid and mapped to arbitrary but unique code points |
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147 such that 'sysstr(a) != sysstr(b)' for all 'a != b'. |
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148 """ |
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149 if isinstance(s, builtins.str): |
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150 return s |
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151 return s.decode(u'latin-1') |
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152 |
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153 def _wrapattrfunc(f): |
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154 @functools.wraps(f) |
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155 def w(object, name, *args): |
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156 return f(object, sysstr(name), *args) |
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157 return w |
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158 |
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159 # these wrappers are automagically imported by hgloader |
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160 delattr = _wrapattrfunc(builtins.delattr) |
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161 getattr = _wrapattrfunc(builtins.getattr) |
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162 hasattr = _wrapattrfunc(builtins.hasattr) |
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163 setattr = _wrapattrfunc(builtins.setattr) |
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164 xrange = builtins.range |
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165 |
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166 def open(name, mode='r', buffering=-1): |
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167 return builtins.open(name, sysstr(mode), buffering) |
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168 |
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169 # getopt.getopt() on Python 3 deals with unicodes internally so we cannot |
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170 # pass bytes there. Passing unicodes will result in unicodes as return |
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171 # values which we need to convert again to bytes. |
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172 def getoptb(args, shortlist, namelist): |
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173 args = [a.decode('latin-1') for a in args] |
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174 shortlist = shortlist.decode('latin-1') |
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175 namelist = [a.decode('latin-1') for a in namelist] |
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176 opts, args = getopt.getopt(args, shortlist, namelist) |
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177 opts = [(a[0].encode('latin-1'), a[1].encode('latin-1')) |
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178 for a in opts] |
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179 args = [a.encode('latin-1') for a in args] |
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180 return opts, args |
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181 |
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182 # keys of keyword arguments in Python need to be strings which are unicodes |
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183 # Python 3. This function takes keyword arguments, convert the keys to str. |
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184 def strkwargs(dic): |
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185 dic = dict((k.decode('latin-1'), v) for k, v in dic.iteritems()) |
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186 return dic |
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187 |
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188 # keys of keyword arguments need to be unicode while passing into |
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189 # a function. This function helps us to convert those keys back to bytes |
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190 # again as we need to deal with bytes. |
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191 def byteskwargs(dic): |
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192 dic = dict((k.encode('latin-1'), v) for k, v in dic.iteritems()) |
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193 return dic |
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194 |
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195 # shlex.split() accepts unicodes on Python 3. This function takes bytes |
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196 # argument, convert it into unicodes, pass into shlex.split(), convert the |
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197 # returned value to bytes and return that. |
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198 # TODO: handle shlex.shlex(). |
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199 def shlexsplit(s): |
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200 ret = shlex.split(s.decode('latin-1')) |
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201 return [a.encode('latin-1') for a in ret] |
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202 |
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203 else: |
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204 import cStringIO |
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205 |
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206 bytechr = chr |
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207 bytestr = str |
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208 iterbytestr = iter |
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209 |
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210 def sysstr(s): |
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211 return s |
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212 |
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213 # Partial backport from os.py in Python 3, which only accepts bytes. |
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214 # In Python 2, our paths should only ever be bytes, a unicode path |
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215 # indicates a bug. |
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216 def fsencode(filename): |
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217 if isinstance(filename, str): |
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218 return filename |
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219 else: |
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220 raise TypeError( |
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221 "expect str, not %s" % type(filename).__name__) |
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222 |
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223 # In Python 2, fsdecode() has a very chance to receive bytes. So it's |
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224 # better not to touch Python 2 part as it's already working fine. |
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225 def fsdecode(filename): |
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226 return filename |
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227 |
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228 def getoptb(args, shortlist, namelist): |
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229 return getopt.getopt(args, shortlist, namelist) |
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230 |
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231 def strkwargs(dic): |
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232 return dic |
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233 |
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234 def byteskwargs(dic): |
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235 return dic |
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236 |
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237 osname = os.name |
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238 ospathsep = os.pathsep |
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239 ossep = os.sep |
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240 osaltsep = os.altsep |
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241 stdin = sys.stdin |
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242 stdout = sys.stdout |
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243 stderr = sys.stderr |
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244 if getattr(sys, 'argv', None) is not None: |
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245 sysargv = sys.argv |
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246 sysplatform = sys.platform |
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247 getcwd = os.getcwd |
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248 sysexecutable = sys.executable |
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249 shlexsplit = shlex.split |
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250 stringio = cStringIO.StringIO |
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251 maplist = map |
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252 |
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253 empty = _queue.Empty |
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254 queue = _queue.Queue |
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255 |
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256 class _pycompatstub(object): |
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257 def __init__(self): |
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258 self._aliases = {} |
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259 |
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260 def _registeraliases(self, origin, items): |
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261 """Add items that will be populated at the first access""" |
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262 items = map(sysstr, items) |
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263 self._aliases.update( |
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264 (item.replace(sysstr('_'), sysstr('')).lower(), (origin, item)) |
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265 for item in items) |
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266 |
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267 def _registeralias(self, origin, attr, name): |
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268 """Alias ``origin``.``attr`` as ``name``""" |
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269 self._aliases[sysstr(name)] = (origin, sysstr(attr)) |
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270 |
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271 def __getattr__(self, name): |
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272 try: |
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273 origin, item = self._aliases[name] |
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274 except KeyError: |
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275 raise AttributeError(name) |
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276 self.__dict__[name] = obj = getattr(origin, item) |
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277 return obj |
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278 |
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279 httpserver = _pycompatstub() |
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280 urlreq = _pycompatstub() |
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281 urlerr = _pycompatstub() |
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282 if not ispy3: |
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283 import BaseHTTPServer |
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284 import CGIHTTPServer |
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285 import SimpleHTTPServer |
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286 import urllib2 |
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287 import urllib |
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288 import urlparse |
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289 urlreq._registeraliases(urllib, ( |
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290 "addclosehook", |
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291 "addinfourl", |
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292 "ftpwrapper", |
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293 "pathname2url", |
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294 "quote", |
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295 "splitattr", |
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296 "splitpasswd", |
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297 "splitport", |
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298 "splituser", |
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299 "unquote", |
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300 "url2pathname", |
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301 "urlencode", |
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302 )) |
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303 urlreq._registeraliases(urllib2, ( |
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304 "AbstractHTTPHandler", |
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305 "BaseHandler", |
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306 "build_opener", |
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307 "FileHandler", |
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308 "FTPHandler", |
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309 "HTTPBasicAuthHandler", |
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310 "HTTPDigestAuthHandler", |
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311 "HTTPHandler", |
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312 "HTTPPasswordMgrWithDefaultRealm", |
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313 "HTTPSHandler", |
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314 "install_opener", |
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315 "ProxyHandler", |
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316 "Request", |
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317 "urlopen", |
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318 )) |
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319 urlreq._registeraliases(urlparse, ( |
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320 "urlparse", |
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321 "urlunparse", |
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322 )) |
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323 urlerr._registeraliases(urllib2, ( |
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324 "HTTPError", |
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325 "URLError", |
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326 )) |
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327 httpserver._registeraliases(BaseHTTPServer, ( |
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328 "HTTPServer", |
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329 "BaseHTTPRequestHandler", |
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330 )) |
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331 httpserver._registeraliases(SimpleHTTPServer, ( |
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332 "SimpleHTTPRequestHandler", |
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333 )) |
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334 httpserver._registeraliases(CGIHTTPServer, ( |
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335 "CGIHTTPRequestHandler", |
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336 )) |
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337 |
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338 else: |
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339 import urllib.parse |
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340 urlreq._registeraliases(urllib.parse, ( |
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341 "splitattr", |
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342 "splitpasswd", |
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343 "splitport", |
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344 "splituser", |
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345 "urlparse", |
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346 "urlunparse", |
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347 )) |
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348 urlreq._registeralias(urllib.parse, "unquote_to_bytes", "unquote") |
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349 import urllib.request |
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350 urlreq._registeraliases(urllib.request, ( |
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351 "AbstractHTTPHandler", |
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352 "BaseHandler", |
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353 "build_opener", |
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354 "FileHandler", |
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355 "FTPHandler", |
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356 "ftpwrapper", |
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357 "HTTPHandler", |
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358 "HTTPSHandler", |
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359 "install_opener", |
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360 "pathname2url", |
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361 "HTTPBasicAuthHandler", |
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362 "HTTPDigestAuthHandler", |
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363 "HTTPPasswordMgrWithDefaultRealm", |
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364 "ProxyHandler", |
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365 "Request", |
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366 "url2pathname", |
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367 "urlopen", |
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368 )) |
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369 import urllib.response |
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370 urlreq._registeraliases(urllib.response, ( |
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371 "addclosehook", |
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372 "addinfourl", |
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373 )) |
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374 import urllib.error |
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375 urlerr._registeraliases(urllib.error, ( |
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376 "HTTPError", |
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377 "URLError", |
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378 )) |
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379 import http.server |
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380 httpserver._registeraliases(http.server, ( |
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381 "HTTPServer", |
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382 "BaseHTTPRequestHandler", |
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383 "SimpleHTTPRequestHandler", |
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384 "CGIHTTPRequestHandler", |
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385 )) |
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386 |
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387 # urllib.parse.quote() accepts both str and bytes, decodes bytes |
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388 # (if necessary), and returns str. This is wonky. We provide a custom |
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389 # implementation that only accepts bytes and emits bytes. |
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390 def quote(s, safe=r'/'): |
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391 s = urllib.parse.quote_from_bytes(s, safe=safe) |
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392 return s.encode('ascii', 'strict') |
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393 |
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394 urlreq.quote = quote |