Source code for oauthlib.oauth2.rfc6749.grant_types.refresh_token

import json
import logging

from .. import errors, utils
from .base import GrantTypeBase

log = logging.getLogger(__name__)

[docs]class RefreshTokenGrant(GrantTypeBase): """`Refresh token grant`_ .. _`Refresh token grant`: """ def __init__(self, request_validator=None, issue_new_refresh_tokens=True, **kwargs): super().__init__( request_validator, issue_new_refresh_tokens=issue_new_refresh_tokens, **kwargs)
[docs] def create_token_response(self, request, token_handler): """Create a new access token from a refresh_token. :param request: OAuthlib request. :type request: oauthlib.common.Request :param token_handler: A token handler instance, for example of type oauthlib.oauth2.BearerToken. If valid and authorized, the authorization server issues an access token as described in `Section 5.1`_. If the request failed verification or is invalid, the authorization server returns an error response as described in `Section 5.2`_. The authorization server MAY issue a new refresh token, in which case the client MUST discard the old refresh token and replace it with the new refresh token. The authorization server MAY revoke the old refresh token after issuing a new refresh token to the client. If a new refresh token is issued, the refresh token scope MUST be identical to that of the refresh token included by the client in the request. .. _`Section 5.1`: .. _`Section 5.2`: """ headers = self._get_default_headers() try: log.debug('Validating refresh token request, %r.', request) self.validate_token_request(request) except errors.OAuth2Error as e: log.debug('Client error in token request, %s.', e) headers.update(e.headers) return headers, e.json, e.status_code token = token_handler.create_token(request, refresh_token=self.issue_new_refresh_tokens) for modifier in self._token_modifiers: token = modifier(token, token_handler, request) self.request_validator.save_token(token, request) log.debug('Issuing new token to client id %r (%r), %r.', request.client_id, request.client, token) headers.update(self._create_cors_headers(request)) return headers, json.dumps(token), 200
[docs] def validate_token_request(self, request): """ :param request: OAuthlib request. :type request: oauthlib.common.Request """ # REQUIRED. Value MUST be set to "refresh_token". if request.grant_type != 'refresh_token': raise errors.UnsupportedGrantTypeError(request=request) for validator in self.custom_validators.pre_token: validator(request) if request.refresh_token is None: raise errors.InvalidRequestError( description='Missing refresh token parameter.', request=request) # Because refresh tokens are typically long-lasting credentials used to # request additional access tokens, the refresh token is bound to the # client to which it was issued. If the client type is confidential or # the client was issued client credentials (or assigned other # authentication requirements), the client MUST authenticate with the # authorization server as described in Section 3.2.1. # if self.request_validator.client_authentication_required(request): log.debug('Authenticating client, %r.', request) if not self.request_validator.authenticate_client(request): log.debug('Invalid client (%r), denying access.', request) raise errors.InvalidClientError(request=request) # Ensure that request.client_id is set. if request.client_id is None and request.client is not None: request.client_id = request.client.client_id elif not self.request_validator.authenticate_client_id(request.client_id, request): log.debug('Client authentication failed, %r.', request) raise errors.InvalidClientError(request=request) # Ensure client is authorized use of this grant type self.validate_grant_type(request) # REQUIRED. The refresh token issued to the client. log.debug('Validating refresh token %s for client %r.', request.refresh_token, request.client) if not self.request_validator.validate_refresh_token( request.refresh_token, request.client, request): log.debug('Invalid refresh token, %s, for client %r.', request.refresh_token, request.client) raise errors.InvalidGrantError(request=request) original_scopes = utils.scope_to_list( self.request_validator.get_original_scopes( request.refresh_token, request)) if request.scope: request.scopes = utils.scope_to_list(request.scope) if (not all(s in original_scopes for s in request.scopes) and not self.request_validator.is_within_original_scope( request.scopes, request.refresh_token, request)): log.debug('Refresh token %s lack requested scopes, %r.', request.refresh_token, request.scopes) raise errors.InvalidScopeError(request=request) else: request.scopes = original_scopes for validator in self.custom_validators.post_token: validator(request)