mirror of
https://github.com/fastapi-users/fastapi-users.git
synced 2025-08-15 03:04:27 +08:00
74 lines
2.6 KiB
Python
74 lines
2.6 KiB
Python
import jwt
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from fastapi import Depends
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from fastapi.security import OAuth2PasswordBearer
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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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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/login")
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class JWTAuthentication(BaseAuthentication):
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"""
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Authentication using a JWT.
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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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"""
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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__(self, secret: str, lifetime_seconds: int):
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self.secret = secret
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self.lifetime_seconds = lifetime_seconds
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async def get_login_response(self, user: BaseUserDB, response: Response):
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data = {"user_id": user.id, "aud": self.token_audience}
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token = generate_jwt(data, self.lifetime_seconds, self.secret, JWT_ALGORITHM)
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return {"token": token}
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def get_current_user(self, user_db: BaseUserDatabase):
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async def _get_current_user(token: str = Depends(oauth2_scheme)):
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user = await self._get_authentication_method(user_db)(token)
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return self._get_current_user_base(user)
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return _get_current_user
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def get_current_active_user(self, user_db: BaseUserDatabase):
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async def _get_current_active_user(token: str = Depends(oauth2_scheme)):
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user = await self._get_authentication_method(user_db)(token)
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return self._get_current_active_user_base(user)
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return _get_current_active_user
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def get_current_superuser(self, user_db: BaseUserDatabase):
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async def _get_current_superuser(token: str = Depends(oauth2_scheme)):
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user = await self._get_authentication_method(user_db)(token)
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return self._get_current_superuser_base(user)
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return _get_current_superuser
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def _get_authentication_method(self, user_db: BaseUserDatabase):
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async def authentication_method(token: str = Depends(oauth2_scheme)):
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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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return authentication_method
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