mirror of
https://github.com/fastapi-users/fastapi-users.git
synced 2025-11-04 22:56:56 +08:00
49deb437a6
* Revamp authentication to allow multiple backends * Make router generate a login route for each backend * Apply black * Remove unused imports * Complete docstrings * Update documentation * WIP add cookie auth * Complete cookie auth unit tests * Add documentation for cookie auth * Fix cookie backend default name * Don't make cookie return a Response
71 lines
2.3 KiB
Python
71 lines
2.3 KiB
Python
from typing import Any, Optional
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import jwt
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from fastapi.security import OAuth2PasswordBearer
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from starlette.requests import Request
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from starlette.responses import Response
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from fastapi_users.authentication.base import BaseAuthentication
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from fastapi_users.db.base import BaseUserDatabase
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from fastapi_users.models import BaseUserDB
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from fastapi_users.utils import JWT_ALGORITHM, generate_jwt
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class JWTAuthentication(BaseAuthentication):
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"""
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Authentication backend using a JWT in a Bearer header.
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:param secret: Secret used to encode the JWT.
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:param lifetime_seconds: Lifetime duration of the JWT in seconds.
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:param tokenUrl: Path where to get a token.
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:param name: Name of the backend. It will be used to name the login route.
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"""
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token_audience: str = "fastapi-users:auth"
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secret: str
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lifetime_seconds: int
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def __init__(
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self,
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secret: str,
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lifetime_seconds: int,
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tokenUrl: str = "/users/login",
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name: str = "jwt",
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):
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super().__init__(name)
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self.secret = secret
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self.lifetime_seconds = lifetime_seconds
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self.scheme = OAuth2PasswordBearer(tokenUrl, auto_error=False)
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async def __call__(
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self, request: Request, user_db: BaseUserDatabase,
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) -> Optional[BaseUserDB]:
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token = await self._retrieve_token(request)
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if token is None:
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return None
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try:
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data = jwt.decode(
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token,
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self.secret,
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audience=self.token_audience,
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algorithms=[JWT_ALGORITHM],
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)
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user_id = data.get("user_id")
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if user_id is None:
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return None
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except jwt.PyJWTError:
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return None
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return await user_db.get(user_id)
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async def get_login_response(self, user: BaseUserDB, response: Response) -> Any:
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token = await self._generate_token(user)
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return {"token": token}
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async def _retrieve_token(self, request: Request) -> Optional[str]:
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return await self.scheme.__call__(request)
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async def _generate_token(self, user: BaseUserDB) -> str:
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data = {"user_id": user.id, "aud": self.token_audience}
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return generate_jwt(data, self.lifetime_seconds, self.secret, JWT_ALGORITHM)
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