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- """
- oauthlib.oauth2.rfc6749
- ~~~~~~~~~~~~~~~~~~~~~~~
- This module is an implementation of various logic needed
- for consuming and providing OAuth 2.0 RFC6749.
- """
- import logging
- from oauthlib.common import Request
- from .base import BaseEndpoint, catch_errors_and_unavailability
- log = logging.getLogger(__name__)
- class ResourceEndpoint(BaseEndpoint):
- """Authorizes access to protected resources.
- The client accesses protected resources by presenting the access
- token to the resource server. The resource server MUST validate the
- access token and ensure that it has not expired and that its scope
- covers the requested resource. The methods used by the resource
- server to validate the access token (as well as any error responses)
- are beyond the scope of this specification but generally involve an
- interaction or coordination between the resource server and the
- authorization server::
- # For most cases, returning a 403 should suffice.
- The method in which the client utilizes the access token to
- authenticate with the resource server depends on the type of access
- token issued by the authorization server. Typically, it involves
- using the HTTP "Authorization" request header field [RFC2617] with an
- authentication scheme defined by the specification of the access
- token type used, such as [RFC6750]::
- # Access tokens may also be provided in query and body
- https://example.com/protected?access_token=kjfch2345sdf # Query
- access_token=sdf23409df # Body
- """
- def __init__(self, default_token, token_types):
- BaseEndpoint.__init__(self)
- self._tokens = token_types
- self._default_token = default_token
- @property
- def default_token(self):
- return self._default_token
- @property
- def default_token_type_handler(self):
- return self.tokens.get(self.default_token)
- @property
- def tokens(self):
- return self._tokens
- @catch_errors_and_unavailability
- def verify_request(self, uri, http_method='GET', body=None, headers=None,
- scopes=None):
- """Validate client, code etc, return body + headers"""
- request = Request(uri, http_method, body, headers)
- request.token_type = self.find_token_type(request)
- request.scopes = scopes
- token_type_handler = self.tokens.get(request.token_type,
- self.default_token_type_handler)
- log.debug('Dispatching token_type %s request to %r.',
- request.token_type, token_type_handler)
- return token_type_handler.validate_request(request), request
- def find_token_type(self, request):
- """Token type identification.
- RFC 6749 does not provide a method for easily differentiating between
- different token types during protected resource access. We estimate
- the most likely token type (if any) by asking each known token type
- to give an estimation based on the request.
- """
- estimates = sorted(((t.estimate_type(request), n)
- for n, t in self.tokens.items()), reverse=True)
- return estimates[0][1] if len(estimates) else None
|
