Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/requests_toolbelt/_compat.py @ 3:758bc20232e8 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:20:52 -0400
parents 26e78fe6e8c4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
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1 """Private module full of compatibility hacks.
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2
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3 Primarily this is for downstream redistributions of requests that unvendor
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4 urllib3 without providing a shim.
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5
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6 .. warning::
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7
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8 This module is private. If you use it, and something breaks, you were
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9 warned
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10 """
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11 import sys
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12
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13 import requests
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14
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15 try:
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16 from requests.packages.urllib3 import fields
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17 from requests.packages.urllib3 import filepost
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18 from requests.packages.urllib3 import poolmanager
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19 except ImportError:
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20 from urllib3 import fields
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21 from urllib3 import filepost
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22 from urllib3 import poolmanager
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23
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24 try:
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25 from requests.packages.urllib3.connection import HTTPConnection
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26 from requests.packages.urllib3 import connection
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27 except ImportError:
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28 try:
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29 from urllib3.connection import HTTPConnection
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30 from urllib3 import connection
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31 except ImportError:
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32 HTTPConnection = None
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33 connection = None
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34
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35
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36 if requests.__build__ < 0x020300:
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37 timeout = None
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38 else:
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39 try:
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40 from requests.packages.urllib3.util import timeout
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41 except ImportError:
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42 from urllib3.util import timeout
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43
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44 if requests.__build__ < 0x021000:
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45 gaecontrib = None
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46 else:
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47 try:
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48 from requests.packages.urllib3.contrib import appengine as gaecontrib
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49 except ImportError:
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50 from urllib3.contrib import appengine as gaecontrib
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51
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52 if requests.__build__ < 0x021200:
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53 PyOpenSSLContext = None
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54 else:
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55 try:
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56 from requests.packages.urllib3.contrib.pyopenssl \
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57 import PyOpenSSLContext
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58 except ImportError:
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59 try:
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60 from urllib3.contrib.pyopenssl import PyOpenSSLContext
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61 except ImportError:
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62 PyOpenSSLContext = None
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63
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64 PY3 = sys.version_info > (3, 0)
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65
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66 if PY3:
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67 from collections.abc import Mapping, MutableMapping
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68 import queue
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69 from urllib.parse import urlencode, urljoin
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70 else:
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71 from collections import Mapping, MutableMapping
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72 import Queue as queue
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73 from urllib import urlencode
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74 from urlparse import urljoin
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75
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76 try:
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77 basestring = basestring
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78 except NameError:
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79 basestring = (str, bytes)
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80
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81
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82 class HTTPHeaderDict(MutableMapping):
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83 """
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84 :param headers:
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85 An iterable of field-value pairs. Must not contain multiple field names
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86 when compared case-insensitively.
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87
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88 :param kwargs:
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89 Additional field-value pairs to pass in to ``dict.update``.
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90
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91 A ``dict`` like container for storing HTTP Headers.
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92
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93 Field names are stored and compared case-insensitively in compliance with
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94 RFC 7230. Iteration provides the first case-sensitive key seen for each
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95 case-insensitive pair.
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96
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97 Using ``__setitem__`` syntax overwrites fields that compare equal
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98 case-insensitively in order to maintain ``dict``'s api. For fields that
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99 compare equal, instead create a new ``HTTPHeaderDict`` and use ``.add``
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100 in a loop.
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101
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102 If multiple fields that are equal case-insensitively are passed to the
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103 constructor or ``.update``, the behavior is undefined and some will be
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104 lost.
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105
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106 >>> headers = HTTPHeaderDict()
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107 >>> headers.add('Set-Cookie', 'foo=bar')
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108 >>> headers.add('set-cookie', 'baz=quxx')
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109 >>> headers['content-length'] = '7'
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110 >>> headers['SET-cookie']
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111 'foo=bar, baz=quxx'
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112 >>> headers['Content-Length']
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113 '7'
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114 """
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115
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116 def __init__(self, headers=None, **kwargs):
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117 super(HTTPHeaderDict, self).__init__()
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118 self._container = {}
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119 if headers is not None:
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120 if isinstance(headers, HTTPHeaderDict):
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121 self._copy_from(headers)
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122 else:
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123 self.extend(headers)
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124 if kwargs:
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125 self.extend(kwargs)
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126
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127 def __setitem__(self, key, val):
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128 self._container[key.lower()] = (key, val)
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129 return self._container[key.lower()]
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130
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131 def __getitem__(self, key):
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132 val = self._container[key.lower()]
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133 return ', '.join(val[1:])
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134
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135 def __delitem__(self, key):
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136 del self._container[key.lower()]
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137
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138 def __contains__(self, key):
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139 return key.lower() in self._container
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140
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141 def __eq__(self, other):
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142 if not isinstance(other, Mapping) and not hasattr(other, 'keys'):
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143 return False
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144 if not isinstance(other, type(self)):
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145 other = type(self)(other)
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146 return (dict((k.lower(), v) for k, v in self.itermerged()) ==
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147 dict((k.lower(), v) for k, v in other.itermerged()))
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148
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149 def __ne__(self, other):
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150 return not self.__eq__(other)
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151
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152 if not PY3: # Python 2
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153 iterkeys = MutableMapping.iterkeys
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154 itervalues = MutableMapping.itervalues
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155
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156 __marker = object()
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157
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158 def __len__(self):
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159 return len(self._container)
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160
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161 def __iter__(self):
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162 # Only provide the originally cased names
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163 for vals in self._container.values():
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164 yield vals[0]
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165
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166 def pop(self, key, default=__marker):
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167 """D.pop(k[,d]) -> v, remove specified key and return its value.
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168
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169 If key is not found, d is returned if given, otherwise KeyError is
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170 raised.
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171 """
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172 # Using the MutableMapping function directly fails due to the private
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173 # marker.
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174 # Using ordinary dict.pop would expose the internal structures.
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175 # So let's reinvent the wheel.
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176 try:
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177 value = self[key]
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178 except KeyError:
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179 if default is self.__marker:
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180 raise
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181 return default
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182 else:
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183 del self[key]
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184 return value
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185
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186 def discard(self, key):
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187 try:
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188 del self[key]
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189 except KeyError:
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190 pass
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191
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192 def add(self, key, val):
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193 """Adds a (name, value) pair, doesn't overwrite the value if it already
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194 exists.
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195
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196 >>> headers = HTTPHeaderDict(foo='bar')
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197 >>> headers.add('Foo', 'baz')
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198 >>> headers['foo']
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199 'bar, baz'
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200 """
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201 key_lower = key.lower()
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202 new_vals = key, val
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203 # Keep the common case aka no item present as fast as possible
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204 vals = self._container.setdefault(key_lower, new_vals)
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205 if new_vals is not vals:
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206 # new_vals was not inserted, as there was a previous one
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207 if isinstance(vals, list):
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208 # If already several items got inserted, we have a list
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209 vals.append(val)
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210 else:
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211 # vals should be a tuple then, i.e. only one item so far
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212 # Need to convert the tuple to list for further extension
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213 self._container[key_lower] = [vals[0], vals[1], val]
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214
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215 def extend(self, *args, **kwargs):
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216 """Generic import function for any type of header-like object.
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217 Adapted version of MutableMapping.update in order to insert items
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218 with self.add instead of self.__setitem__
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219 """
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220 if len(args) > 1:
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221 raise TypeError("extend() takes at most 1 positional "
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222 "arguments ({} given)".format(len(args)))
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223 other = args[0] if len(args) >= 1 else ()
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224
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225 if isinstance(other, HTTPHeaderDict):
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226 for key, val in other.iteritems():
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227 self.add(key, val)
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228 elif isinstance(other, Mapping):
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229 for key in other:
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230 self.add(key, other[key])
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231 elif hasattr(other, "keys"):
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232 for key in other.keys():
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233 self.add(key, other[key])
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234 else:
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235 for key, value in other:
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236 self.add(key, value)
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237
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238 for key, value in kwargs.items():
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239 self.add(key, value)
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240
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241 def getlist(self, key):
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242 """Returns a list of all the values for the named field. Returns an
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243 empty list if the key doesn't exist."""
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244 try:
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245 vals = self._container[key.lower()]
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246 except KeyError:
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247 return []
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248 else:
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249 if isinstance(vals, tuple):
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250 return [vals[1]]
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251 else:
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252 return vals[1:]
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253
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254 # Backwards compatibility for httplib
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255 getheaders = getlist
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256 getallmatchingheaders = getlist
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257 iget = getlist
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258
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259 def __repr__(self):
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260 return "%s(%s)" % (type(self).__name__, dict(self.itermerged()))
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261
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262 def _copy_from(self, other):
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263 for key in other:
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264 val = other.getlist(key)
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265 if isinstance(val, list):
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266 # Don't need to convert tuples
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267 val = list(val)
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268 self._container[key.lower()] = [key] + val
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269
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270 def copy(self):
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271 clone = type(self)()
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272 clone._copy_from(self)
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273 return clone
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274
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275 def iteritems(self):
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276 """Iterate over all header lines, including duplicate ones."""
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277 for key in self:
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278 vals = self._container[key.lower()]
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279 for val in vals[1:]:
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280 yield vals[0], val
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281
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282 def itermerged(self):
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283 """Iterate over all headers, merging duplicate ones together."""
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284 for key in self:
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285 val = self._container[key.lower()]
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286 yield val[0], ', '.join(val[1:])
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287
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288 def items(self):
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289 return list(self.iteritems())
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290
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291 @classmethod
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292 def from_httplib(cls, message): # Python 2
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293 """Read headers from a Python 2 httplib message object."""
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294 # python2.7 does not expose a proper API for exporting multiheaders
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295 # efficiently. This function re-reads raw lines from the message
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296 # object and extracts the multiheaders properly.
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297 headers = []
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298
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299 for line in message.headers:
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300 if line.startswith((' ', '\t')):
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301 key, value = headers[-1]
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302 headers[-1] = (key, value + '\r\n' + line.rstrip())
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303 continue
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304
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305 key, value = line.split(':', 1)
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306 headers.append((key, value.strip()))
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307
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308 return cls(headers)
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309
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310
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311 __all__ = (
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312 'basestring',
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313 'connection',
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314 'fields',
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315 'filepost',
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316 'poolmanager',
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317 'timeout',
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318 'HTTPHeaderDict',
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319 'queue',
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320 'urlencode',
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321 'gaecontrib',
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322 'urljoin',
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323 'PyOpenSSLContext',
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324 )