84 lines
2.9 KiB
Python
84 lines
2.9 KiB
Python
from datetime import datetime, timedelta
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from typing import Optional
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from fastapi import Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer
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from sqlmodel import Session, select
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from database import get_session
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from models import User
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import os
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# Configuration
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SECRET_KEY = os.getenv("SECRET_KEY", "supersecretkey") # Change this in production!
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ALGORITHM = "HS256"
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ACCESS_TOKEN_EXPIRE_MINUTES = 10080 # 7 days
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pwd_context = CryptContext(schemes=["argon2"], deprecated="auto")
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="auth/token")
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def verify_password(plain_password, hashed_password):
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password):
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return pwd_context.hash(password)
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None):
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to_encode = data.copy()
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if expires_delta:
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expire = datetime.utcnow() + expires_delta
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else:
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expire = datetime.utcnow() + timedelta(minutes=15)
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to_encode.update({"exp": expire})
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encoded_jwt = jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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return encoded_jwt
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async def get_current_user(token: str = Depends(oauth2_scheme), session: Session = Depends(get_session)):
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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 = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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email: str = payload.get("sub")
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if email is None:
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raise credentials_exception
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except JWTError:
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raise credentials_exception
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user = session.exec(select(User).where(User.email == email)).first()
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if user is None:
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raise credentials_exception
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return user
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async def get_current_superuser(current_user: User = Depends(get_current_user)):
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if not current_user.is_superuser:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="The user doesn't have enough privileges"
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)
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return current_user
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# Optional OAuth scheme that doesn't require auth
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oauth2_scheme_optional = OAuth2PasswordBearer(tokenUrl="auth/token", auto_error=False)
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async def get_current_user_optional(
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token: Optional[str] = Depends(oauth2_scheme_optional),
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session: Session = Depends(get_session)
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) -> Optional[User]:
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"""Get current user if authenticated, otherwise return None (for public endpoints)"""
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if not token:
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return None
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try:
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payload = jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
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email: str = payload.get("sub")
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if email is None:
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return None
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except JWTError:
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return None
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user = session.exec(select(User).where(User.email == email)).first()
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return user
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