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| 1 | +# Licensed to the Apache Software Foundation (ASF) under one |
| 2 | +# or more contributor license agreements. See the NOTICE file |
| 3 | +# distributed with this work for additional information |
| 4 | +# regarding copyright ownership. The ASF licenses this file |
| 5 | +# to you under the Apache License, Version 2.0 (the |
| 6 | +# "License"); you may not use this file except in compliance |
| 7 | +# with the License. You may obtain a copy of the License at |
| 8 | +# |
| 9 | +# http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | +# |
| 11 | +# Unless required by applicable law or agreed to in writing, |
| 12 | +# software distributed under the License is distributed on an |
| 13 | +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 14 | +# KIND, either express or implied. See the License for the |
| 15 | +# specific language governing permissions and limitations |
| 16 | +# under the License. |
| 17 | +"""Session authentication backend""" |
| 18 | +from functools import wraps |
| 19 | +from typing import Any, Callable, Optional, Tuple, TypeVar, Union, cast |
| 20 | + |
| 21 | +from flask import Response, g |
| 22 | + |
| 23 | +CLIENT_AUTH: Optional[Union[Tuple[str, str], Any]] = None |
| 24 | + |
| 25 | + |
| 26 | +def init_app(_): |
| 27 | + """Initializes authentication backend""" |
| 28 | + |
| 29 | + |
| 30 | +T = TypeVar("T", bound=Callable) |
| 31 | + |
| 32 | + |
| 33 | +def requires_authentication(function: T): |
| 34 | + """Decorator for functions that require authentication""" |
| 35 | + |
| 36 | + @wraps(function) |
| 37 | + def decorated(*args, **kwargs): |
| 38 | + if g.user.is_anonymous: |
| 39 | + return Response("Unauthorized", 401, {}) |
| 40 | + return function(*args, **kwargs) |
| 41 | + |
| 42 | + return cast(T, decorated) |
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