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from django.contrib.auth import get_user_model
from django.core.exceptions import SuspiciousOperation
from .oauth2_backends import get_oauthlib_core
UserModel = get_user_model()
OAuthLibCore = get_oauthlib_core()
class OAuth2Backend:
"""
Authenticate against an OAuth2 access token
"""
def authenticate(self, request=None, **credentials):
if request is not None:
try:
valid, request = OAuthLibCore.verify_request(request, scopes=[])
except ValueError as error:
if str(error) == "Invalid hex encoding in query string.":
raise SuspiciousOperation(error)
else:
raise
else:
if valid:
return request.user
return None
def get_user(self, user_id):
try:
return UserModel.objects.get(pk=user_id)
except UserModel.DoesNotExist:
return None
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