Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/requests_toolbelt/auth/handler.py @ 0:26e78fe6e8c4 draft

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"planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
author shellac
date Sat, 02 May 2020 07:14:21 -0400
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1 # -*- coding: utf-8 -*-
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2 """
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3
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4 requests_toolbelt.auth.handler
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5 ==============================
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6
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7 This holds all of the implementation details of the Authentication Handler.
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8
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9 """
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10
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11 from requests.auth import AuthBase, HTTPBasicAuth
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12 from requests.compat import urlparse, urlunparse
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13
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14
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15 class AuthHandler(AuthBase):
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16
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17 """
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18
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19 The ``AuthHandler`` object takes a dictionary of domains paired with
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20 authentication strategies and will use this to determine which credentials
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21 to use when making a request. For example, you could do the following:
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22
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23 .. code-block:: python
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24
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25 from requests import HTTPDigestAuth
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26 from requests_toolbelt.auth.handler import AuthHandler
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27
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28 import requests
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29
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30 auth = AuthHandler({
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31 'https://api.github.com': ('sigmavirus24', 'fakepassword'),
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32 'https://example.com': HTTPDigestAuth('username', 'password')
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33 })
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34
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35 r = requests.get('https://api.github.com/user', auth=auth)
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36 # => <Response [200]>
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37 r = requests.get('https://example.com/some/path', auth=auth)
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38 # => <Response [200]>
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39
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40 s = requests.Session()
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41 s.auth = auth
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42 r = s.get('https://api.github.com/user')
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43 # => <Response [200]>
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44
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45 .. warning::
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46
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47 :class:`requests.auth.HTTPDigestAuth` is not yet thread-safe. If you
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48 use :class:`AuthHandler` across multiple threads you should
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49 instantiate a new AuthHandler for each thread with a new
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50 HTTPDigestAuth instance for each thread.
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51
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52 """
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53
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54 def __init__(self, strategies):
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55 self.strategies = dict(strategies)
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56 self._make_uniform()
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57
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58 def __call__(self, request):
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59 auth = self.get_strategy_for(request.url)
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60 return auth(request)
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61
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62 def __repr__(self):
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63 return '<AuthHandler({0!r})>'.format(self.strategies)
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64
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65 def _make_uniform(self):
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66 existing_strategies = list(self.strategies.items())
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67 self.strategies = {}
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68
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69 for (k, v) in existing_strategies:
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70 self.add_strategy(k, v)
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71
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72 @staticmethod
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73 def _key_from_url(url):
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74 parsed = urlparse(url)
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75 return urlunparse((parsed.scheme.lower(),
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76 parsed.netloc.lower(),
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77 '', '', '', ''))
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78
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79 def add_strategy(self, domain, strategy):
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80 """Add a new domain and authentication strategy.
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81
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82 :param str domain: The domain you wish to match against. For example:
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83 ``'https://api.github.com'``
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84 :param str strategy: The authentication strategy you wish to use for
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85 that domain. For example: ``('username', 'password')`` or
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86 ``requests.HTTPDigestAuth('username', 'password')``
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87
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88 .. code-block:: python
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89
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90 a = AuthHandler({})
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91 a.add_strategy('https://api.github.com', ('username', 'password'))
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92
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93 """
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94 # Turn tuples into Basic Authentication objects
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95 if isinstance(strategy, tuple):
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96 strategy = HTTPBasicAuth(*strategy)
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97
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98 key = self._key_from_url(domain)
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99 self.strategies[key] = strategy
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100
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101 def get_strategy_for(self, url):
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102 """Retrieve the authentication strategy for a specified URL.
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103
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104 :param str url: The full URL you will be making a request against. For
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105 example, ``'https://api.github.com/user'``
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106 :returns: Callable that adds authentication to a request.
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107
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108 .. code-block:: python
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109
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110 import requests
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111 a = AuthHandler({'example.com', ('foo', 'bar')})
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112 strategy = a.get_strategy_for('http://example.com/example')
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113 assert isinstance(strategy, requests.auth.HTTPBasicAuth)
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114
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115 """
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116 key = self._key_from_url(url)
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117 return self.strategies.get(key, NullAuthStrategy())
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118
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119 def remove_strategy(self, domain):
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120 """Remove the domain and strategy from the collection of strategies.
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121
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122 :param str domain: The domain you wish remove. For example,
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123 ``'https://api.github.com'``.
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124
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125 .. code-block:: python
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126
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127 a = AuthHandler({'example.com', ('foo', 'bar')})
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128 a.remove_strategy('example.com')
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129 assert a.strategies == {}
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130
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131 """
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132 key = self._key_from_url(domain)
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133 if key in self.strategies:
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134 del self.strategies[key]
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135
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136
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137 class NullAuthStrategy(AuthBase):
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138 def __repr__(self):
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139 return '<NullAuthStrategy>'
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140
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141 def __call__(self, r):
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142 return r