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143 lines
4.3 KiB
143 lines
4.3 KiB
# -*- coding: utf-8 -*-
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"""
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requests_toolbelt.auth.handler
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==============================
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This holds all of the implementation details of the Authentication Handler.
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"""
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from requests.auth import AuthBase, HTTPBasicAuth
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from requests.compat import urlparse, urlunparse
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class AuthHandler(AuthBase):
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"""
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The ``AuthHandler`` object takes a dictionary of domains paired with
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authentication strategies and will use this to determine which credentials
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to use when making a request. For example, you could do the following:
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.. code-block:: python
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from requests import HTTPDigestAuth
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from requests_toolbelt.auth.handler import AuthHandler
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import requests
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auth = AuthHandler({
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'https://api.github.com': ('sigmavirus24', 'fakepassword'),
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'https://example.com': HTTPDigestAuth('username', 'password')
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})
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r = requests.get('https://api.github.com/user', auth=auth)
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# => <Response [200]>
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r = requests.get('https://example.com/some/path', auth=auth)
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# => <Response [200]>
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s = requests.Session()
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s.auth = auth
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r = s.get('https://api.github.com/user')
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# => <Response [200]>
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.. warning::
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:class:`requests.auth.HTTPDigestAuth` is not yet thread-safe. If you
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use :class:`AuthHandler` across multiple threads you should
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instantiate a new AuthHandler for each thread with a new
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HTTPDigestAuth instance for each thread.
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"""
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def __init__(self, strategies):
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self.strategies = dict(strategies)
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self._make_uniform()
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def __call__(self, request):
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auth = self.get_strategy_for(request.url)
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return auth(request)
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def __repr__(self):
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return '<AuthHandler({!r})>'.format(self.strategies)
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def _make_uniform(self):
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existing_strategies = list(self.strategies.items())
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self.strategies = {}
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for (k, v) in existing_strategies:
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self.add_strategy(k, v)
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@staticmethod
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def _key_from_url(url):
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parsed = urlparse(url)
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return urlunparse((parsed.scheme.lower(),
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parsed.netloc.lower(),
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'', '', '', ''))
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def add_strategy(self, domain, strategy):
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"""Add a new domain and authentication strategy.
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:param str domain: The domain you wish to match against. For example:
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``'https://api.github.com'``
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:param str strategy: The authentication strategy you wish to use for
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that domain. For example: ``('username', 'password')`` or
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``requests.HTTPDigestAuth('username', 'password')``
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.. code-block:: python
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a = AuthHandler({})
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a.add_strategy('https://api.github.com', ('username', 'password'))
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"""
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# Turn tuples into Basic Authentication objects
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if isinstance(strategy, tuple):
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strategy = HTTPBasicAuth(*strategy)
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key = self._key_from_url(domain)
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self.strategies[key] = strategy
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def get_strategy_for(self, url):
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"""Retrieve the authentication strategy for a specified URL.
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:param str url: The full URL you will be making a request against. For
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example, ``'https://api.github.com/user'``
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:returns: Callable that adds authentication to a request.
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.. code-block:: python
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import requests
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a = AuthHandler({'example.com', ('foo', 'bar')})
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strategy = a.get_strategy_for('http://example.com/example')
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assert isinstance(strategy, requests.auth.HTTPBasicAuth)
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"""
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key = self._key_from_url(url)
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return self.strategies.get(key, NullAuthStrategy())
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def remove_strategy(self, domain):
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"""Remove the domain and strategy from the collection of strategies.
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:param str domain: The domain you wish remove. For example,
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``'https://api.github.com'``.
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.. code-block:: python
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a = AuthHandler({'example.com', ('foo', 'bar')})
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a.remove_strategy('example.com')
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assert a.strategies == {}
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"""
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key = self._key_from_url(domain)
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if key in self.strategies:
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del self.strategies[key]
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class NullAuthStrategy(AuthBase):
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def __repr__(self):
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return '<NullAuthStrategy>'
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def __call__(self, r):
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return r
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