59 lines
1.7 KiB
Python
59 lines
1.7 KiB
Python
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"""
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FastAPI dependency for extracting and validating the current authenticated user.
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"""
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import uuid
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from fastapi import Depends, HTTPException, status
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from fastapi.security import HTTPBearer, HTTPAuthorizationCredentials
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from jose import JWTError
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from sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.auth.jwt import verify_access_token
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from app.database import get_db
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from app.models.user import User
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bearer_scheme = HTTPBearer()
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async def get_current_user(
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credentials: HTTPAuthorizationCredentials = Depends(bearer_scheme),
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db: AsyncSession = Depends(get_db),
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) -> User:
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"""
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Extract Bearer token from Authorization header, verify it,
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and return the corresponding User from the database.
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Raises:
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401 HTTPException if token is missing, invalid, or expired.
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401 HTTPException if the user no longer exists or is inactive.
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"""
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Could not validate credentials",
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headers={"WWW-Authenticate": "Bearer"},
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)
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try:
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payload = verify_access_token(credentials.credentials)
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user_id: str = payload.get("sub")
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if user_id is None:
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raise credentials_exception
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user_uuid = uuid.UUID(user_id)
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except (JWTError, ValueError):
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raise credentials_exception
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result = await db.execute(select(User).where(User.id == user_uuid))
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user = result.scalars().first()
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if user is None:
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raise credentials_exception
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if not user.is_active:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Inactive user account",
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)
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return user
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