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import logging
log = logging.getLogger(__name__)
class Dispatcher:
default_grant = None
oidc_grant = None
class AuthorizationCodeGrantDispatcher(Dispatcher):
"""
This is an adapter class that will route simple Authorization Code
requests, those that have `response_type=code` and a scope including
`openid` to either the `default_grant` or the `oidc_grant` based on
the scopes requested.
"""
def __init__(self, default_grant=None, oidc_grant=None):
self.default_grant = default_grant
self.oidc_grant = oidc_grant
def _handler_for_request(self, request):
handler = self.default_grant
if request.scopes and "openid" in request.scopes:
handler = self.oidc_grant
log.debug('Selecting handler for request %r.', handler)
return handler
def create_authorization_response(self, request, token_handler):
"""Read scope and route to the designated handler."""
return self._handler_for_request(request).create_authorization_response(request, token_handler)
def validate_authorization_request(self, request):
"""Read scope and route to the designated handler."""
return self._handler_for_request(request).validate_authorization_request(request)
class ImplicitTokenGrantDispatcher(Dispatcher):
"""
This is an adapter class that will route simple Authorization
requests, those that have `id_token` in `response_type` and a scope
including `openid` to either the `default_grant` or the `oidc_grant`
based on the scopes requested.
"""
def __init__(self, default_grant=None, oidc_grant=None):
self.default_grant = default_grant
self.oidc_grant = oidc_grant
def _handler_for_request(self, request):
handler = self.default_grant
if request.scopes and "openid" in request.scopes and 'id_token' in request.response_type:
handler = self.oidc_grant
log.debug('Selecting handler for request %r.', handler)
return handler
def create_authorization_response(self, request, token_handler):
"""Read scope and route to the designated handler."""
return self._handler_for_request(request).create_authorization_response(request, token_handler)
def validate_authorization_request(self, request):
"""Read scope and route to the designated handler."""
return self._handler_for_request(request).validate_authorization_request(request)
class AuthorizationTokenGrantDispatcher(Dispatcher):
"""
This is an adapter class that will route simple Token requests, those that authorization_code have a scope
including 'openid' to either the default_grant or the oidc_grant based on the scopes requested.
"""
def __init__(self, request_validator, default_grant=None, oidc_grant=None):
self.default_grant = default_grant
self.oidc_grant = oidc_grant
self.request_validator = request_validator
def _handler_for_request(self, request):
handler = self.default_grant
scopes = ()
parameters = dict(request.decoded_body)
client_id = parameters.get('client_id', None)
code = parameters.get('code', None)
redirect_uri = parameters.get('redirect_uri', None)
# If code is not pressent fallback to `default_grant` which will
# raise an error for the missing `code` in `create_token_response` step.
if code:
scopes = self.request_validator.get_authorization_code_scopes(client_id, code, redirect_uri, request)
if 'openid' in scopes:
handler = self.oidc_grant
log.debug('Selecting handler for request %r.', handler)
return handler
def create_token_response(self, request, token_handler):
"""Read scope and route to the designated handler."""
handler = self._handler_for_request(request)
return handler.create_token_response(request, token_handler)
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