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annotate env/lib/python3.9/site-packages/urllib3/request.py @ 0:4f3585e2f14b draft default tip

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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author shellac
date Mon, 22 Mar 2021 18:12:50 +0000
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1 from __future__ import absolute_import
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2
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3 from .filepost import encode_multipart_formdata
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4 from .packages.six.moves.urllib.parse import urlencode
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5
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6 __all__ = ["RequestMethods"]
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7
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8
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9 class RequestMethods(object):
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10 """
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11 Convenience mixin for classes who implement a :meth:`urlopen` method, such
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12 as :class:`urllib3.HTTPConnectionPool` and
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13 :class:`urllib3.PoolManager`.
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14
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15 Provides behavior for making common types of HTTP request methods and
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16 decides which type of request field encoding to use.
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17
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18 Specifically,
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19
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20 :meth:`.request_encode_url` is for sending requests whose fields are
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21 encoded in the URL (such as GET, HEAD, DELETE).
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22
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23 :meth:`.request_encode_body` is for sending requests whose fields are
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24 encoded in the *body* of the request using multipart or www-form-urlencoded
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25 (such as for POST, PUT, PATCH).
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26
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27 :meth:`.request` is for making any kind of request, it will look up the
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28 appropriate encoding format and use one of the above two methods to make
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29 the request.
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30
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31 Initializer parameters:
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32
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33 :param headers:
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34 Headers to include with all requests, unless other headers are given
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35 explicitly.
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36 """
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37
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38 _encode_url_methods = {"DELETE", "GET", "HEAD", "OPTIONS"}
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39
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40 def __init__(self, headers=None):
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41 self.headers = headers or {}
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42
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43 def urlopen(
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44 self,
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45 method,
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46 url,
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47 body=None,
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48 headers=None,
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49 encode_multipart=True,
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50 multipart_boundary=None,
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51 **kw
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52 ): # Abstract
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53 raise NotImplementedError(
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54 "Classes extending RequestMethods must implement "
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55 "their own ``urlopen`` method."
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56 )
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57
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58 def request(self, method, url, fields=None, headers=None, **urlopen_kw):
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59 """
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60 Make a request using :meth:`urlopen` with the appropriate encoding of
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61 ``fields`` based on the ``method`` used.
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62
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63 This is a convenience method that requires the least amount of manual
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64 effort. It can be used in most situations, while still having the
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65 option to drop down to more specific methods when necessary, such as
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66 :meth:`request_encode_url`, :meth:`request_encode_body`,
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67 or even the lowest level :meth:`urlopen`.
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68 """
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69 method = method.upper()
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70
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71 urlopen_kw["request_url"] = url
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72
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73 if method in self._encode_url_methods:
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74 return self.request_encode_url(
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75 method, url, fields=fields, headers=headers, **urlopen_kw
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76 )
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77 else:
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78 return self.request_encode_body(
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79 method, url, fields=fields, headers=headers, **urlopen_kw
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80 )
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81
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82 def request_encode_url(self, method, url, fields=None, headers=None, **urlopen_kw):
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83 """
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84 Make a request using :meth:`urlopen` with the ``fields`` encoded in
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85 the url. This is useful for request methods like GET, HEAD, DELETE, etc.
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86 """
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87 if headers is None:
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88 headers = self.headers
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89
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90 extra_kw = {"headers": headers}
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91 extra_kw.update(urlopen_kw)
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92
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93 if fields:
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94 url += "?" + urlencode(fields)
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95
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96 return self.urlopen(method, url, **extra_kw)
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97
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98 def request_encode_body(
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99 self,
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100 method,
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101 url,
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102 fields=None,
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103 headers=None,
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104 encode_multipart=True,
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105 multipart_boundary=None,
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106 **urlopen_kw
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107 ):
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108 """
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109 Make a request using :meth:`urlopen` with the ``fields`` encoded in
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110 the body. This is useful for request methods like POST, PUT, PATCH, etc.
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111
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112 When ``encode_multipart=True`` (default), then
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113 :func:`urllib3.encode_multipart_formdata` is used to encode
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114 the payload with the appropriate content type. Otherwise
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115 :func:`urllib.parse.urlencode` is used with the
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116 'application/x-www-form-urlencoded' content type.
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117
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118 Multipart encoding must be used when posting files, and it's reasonably
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119 safe to use it in other times too. However, it may break request
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120 signing, such as with OAuth.
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121
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122 Supports an optional ``fields`` parameter of key/value strings AND
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123 key/filetuple. A filetuple is a (filename, data, MIME type) tuple where
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124 the MIME type is optional. For example::
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125
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126 fields = {
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127 'foo': 'bar',
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128 'fakefile': ('foofile.txt', 'contents of foofile'),
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129 'realfile': ('barfile.txt', open('realfile').read()),
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130 'typedfile': ('bazfile.bin', open('bazfile').read(),
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131 'image/jpeg'),
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132 'nonamefile': 'contents of nonamefile field',
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133 }
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134
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135 When uploading a file, providing a filename (the first parameter of the
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136 tuple) is optional but recommended to best mimic behavior of browsers.
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137
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138 Note that if ``headers`` are supplied, the 'Content-Type' header will
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139 be overwritten because it depends on the dynamic random boundary string
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140 which is used to compose the body of the request. The random boundary
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141 string can be explicitly set with the ``multipart_boundary`` parameter.
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142 """
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143 if headers is None:
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144 headers = self.headers
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145
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146 extra_kw = {"headers": {}}
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147
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148 if fields:
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149 if "body" in urlopen_kw:
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150 raise TypeError(
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151 "request got values for both 'fields' and 'body', can only specify one."
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152 )
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153
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154 if encode_multipart:
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155 body, content_type = encode_multipart_formdata(
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156 fields, boundary=multipart_boundary
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157 )
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158 else:
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159 body, content_type = (
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160 urlencode(fields),
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161 "application/x-www-form-urlencoded",
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162 )
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163
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164 extra_kw["body"] = body
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165 extra_kw["headers"] = {"Content-Type": content_type}
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166
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167 extra_kw["headers"].update(headers)
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168 extra_kw.update(urlopen_kw)
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169
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170 return self.urlopen(method, url, **extra_kw)