Mercurial > repos > shellac > guppy_basecaller
annotate env/lib/python3.7/site-packages/urllib3/request.py @ 4:79f47841a781 draft
"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author | shellac |
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date | Thu, 14 May 2020 16:47:39 -0400 |
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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 |
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7 __all__ = ["RequestMethods"] |
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8 |
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9 |
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10 class RequestMethods(object): |
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11 """ |
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12 Convenience mixin for classes who implement a :meth:`urlopen` method, such |
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13 as :class:`~urllib3.connectionpool.HTTPConnectionPool` and |
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14 :class:`~urllib3.poolmanager.PoolManager`. |
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15 |
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16 Provides behavior for making common types of HTTP request methods and |
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17 decides which type of request field encoding to use. |
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18 |
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19 Specifically, |
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20 |
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21 :meth:`.request_encode_url` is for sending requests whose fields are |
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22 encoded in the URL (such as GET, HEAD, DELETE). |
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23 |
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24 :meth:`.request_encode_body` is for sending requests whose fields are |
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25 encoded in the *body* of the request using multipart or www-form-urlencoded |
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26 (such as for POST, PUT, PATCH). |
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27 |
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28 :meth:`.request` is for making any kind of request, it will look up the |
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29 appropriate encoding format and use one of the above two methods to make |
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30 the request. |
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31 |
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32 Initializer parameters: |
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33 |
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34 :param headers: |
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35 Headers to include with all requests, unless other headers are given |
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36 explicitly. |
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37 """ |
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38 |
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39 _encode_url_methods = {"DELETE", "GET", "HEAD", "OPTIONS"} |
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40 |
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41 def __init__(self, headers=None): |
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42 self.headers = headers or {} |
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43 |
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44 def urlopen( |
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45 self, |
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46 method, |
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47 url, |
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48 body=None, |
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49 headers=None, |
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50 encode_multipart=True, |
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51 multipart_boundary=None, |
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52 **kw |
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53 ): # Abstract |
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54 raise NotImplementedError( |
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55 "Classes extending RequestMethods must implement " |
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56 "their own ``urlopen`` method." |
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57 ) |
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58 |
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59 def request(self, method, url, fields=None, headers=None, **urlopen_kw): |
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60 """ |
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61 Make a request using :meth:`urlopen` with the appropriate encoding of |
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62 ``fields`` based on the ``method`` used. |
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63 |
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64 This is a convenience method that requires the least amount of manual |
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65 effort. It can be used in most situations, while still having the |
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66 option to drop down to more specific methods when necessary, such as |
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67 :meth:`request_encode_url`, :meth:`request_encode_body`, |
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68 or even the lowest level :meth:`urlopen`. |
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69 """ |
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70 method = method.upper() |
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71 |
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72 urlopen_kw["request_url"] = url |
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73 |
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74 if method in self._encode_url_methods: |
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75 return self.request_encode_url( |
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76 method, url, fields=fields, headers=headers, **urlopen_kw |
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77 ) |
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78 else: |
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79 return self.request_encode_body( |
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80 method, url, fields=fields, headers=headers, **urlopen_kw |
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81 ) |
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82 |
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83 def request_encode_url(self, method, url, fields=None, headers=None, **urlopen_kw): |
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84 """ |
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85 Make a request using :meth:`urlopen` with the ``fields`` encoded in |
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86 the url. This is useful for request methods like GET, HEAD, DELETE, etc. |
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87 """ |
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88 if headers is None: |
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89 headers = self.headers |
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90 |
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91 extra_kw = {"headers": headers} |
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92 extra_kw.update(urlopen_kw) |
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93 |
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94 if fields: |
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95 url += "?" + urlencode(fields) |
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96 |
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97 return self.urlopen(method, url, **extra_kw) |
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98 |
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99 def request_encode_body( |
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100 self, |
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101 method, |
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102 url, |
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103 fields=None, |
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104 headers=None, |
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105 encode_multipart=True, |
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106 multipart_boundary=None, |
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107 **urlopen_kw |
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108 ): |
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109 """ |
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110 Make a request using :meth:`urlopen` with the ``fields`` encoded in |
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111 the body. This is useful for request methods like POST, PUT, PATCH, etc. |
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112 |
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113 When ``encode_multipart=True`` (default), then |
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114 :meth:`urllib3.filepost.encode_multipart_formdata` is used to encode |
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115 the payload with the appropriate content type. Otherwise |
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116 :meth:`urllib.urlencode` is used with the |
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117 'application/x-www-form-urlencoded' content type. |
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118 |
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119 Multipart encoding must be used when posting files, and it's reasonably |
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120 safe to use it in other times too. However, it may break request |
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121 signing, such as with OAuth. |
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122 |
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123 Supports an optional ``fields`` parameter of key/value strings AND |
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124 key/filetuple. A filetuple is a (filename, data, MIME type) tuple where |
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125 the MIME type is optional. For example:: |
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126 |
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127 fields = { |
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128 'foo': 'bar', |
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129 'fakefile': ('foofile.txt', 'contents of foofile'), |
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130 'realfile': ('barfile.txt', open('realfile').read()), |
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131 'typedfile': ('bazfile.bin', open('bazfile').read(), |
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132 'image/jpeg'), |
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133 'nonamefile': 'contents of nonamefile field', |
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134 } |
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135 |
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136 When uploading a file, providing a filename (the first parameter of the |
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137 tuple) is optional but recommended to best mimic behavior of browsers. |
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138 |
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139 Note that if ``headers`` are supplied, the 'Content-Type' header will |
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140 be overwritten because it depends on the dynamic random boundary string |
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141 which is used to compose the body of the request. The random boundary |
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142 string can be explicitly set with the ``multipart_boundary`` parameter. |
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143 """ |
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144 if headers is None: |
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145 headers = self.headers |
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146 |
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147 extra_kw = {"headers": {}} |
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148 |
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149 if fields: |
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150 if "body" in urlopen_kw: |
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151 raise TypeError( |
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152 "request got values for both 'fields' and 'body', can only specify one." |
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153 ) |
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154 |
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155 if encode_multipart: |
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156 body, content_type = encode_multipart_formdata( |
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157 fields, boundary=multipart_boundary |
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158 ) |
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159 else: |
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160 body, content_type = ( |
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161 urlencode(fields), |
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162 "application/x-www-form-urlencoded", |
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163 ) |
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164 |
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165 extra_kw["body"] = body |
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166 extra_kw["headers"] = {"Content-Type": content_type} |
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167 |
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168 extra_kw["headers"].update(headers) |
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169 extra_kw.update(urlopen_kw) |
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170 |
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171 return self.urlopen(method, url, **extra_kw) |