lessons_learned/app/api/deps.py

53 lines
1.4 KiB
Python

from typing import Generator, Optional
from fastapi import Depends, HTTPException, status
from jose import jwt, JWTError
from pydantic import BaseModel
from sqlalchemy.orm.session import Session
from app.core.auth import oauth2_scheme
from app.core.config import settings
from app.db.session import SessionLocal
from app.models.user import User
class TokenData(BaseModel):
username: Optional[str] = None
def get_db() -> Generator:
db = SessionLocal()
db.current_user_id = None
try:
yield db
finally:
db.close()
async def get_current_user(
db: Session = Depends(get_db), token: str = Depends(oauth2_scheme)
) -> User:
credentials_exception = HTTPException(
status_code=status.HTTP_401_UNAUTHORIZED,
detail="Could not validate credentials",
headers={"WWW-Authenticate": "Bearer"},
)
try:
payload = jwt.decode(
token,
settings.JWT_SECRET,
algorithms=[settings.ALGORITHM],
options={"verify_aud": False},
)
username: str = payload.get("sub")
if username is None:
raise credentials_exception
token_data = TokenData(username=username)
except JWTError:
raise credentials_exception
user = db.query(User).filter(User.id == token_data.username).first()
if user is None:
raise credentials_exception
return user