71 lines
2.4 KiB
Python
71 lines
2.4 KiB
Python
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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 sqlalchemy.ext.asyncio import AsyncSession
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from sqlalchemy import select
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from fastapi import Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer
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from app.config import settings
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from app.models.user import User
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from app.database import get_db
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/auth/login")
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def verify_password(plain: str, hashed: str) -> bool:
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return pwd_context.verify(plain, hashed)
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def hash_password(password: str) -> str:
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return pwd_context.hash(password)
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def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -> str:
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to_encode = data.copy()
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expire = datetime.utcnow() + (expires_delta or timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES))
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to_encode["exp"] = expire
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return jwt.encode(to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM)
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async def authenticate_user(db: AsyncSession, username: str, password: str) -> Optional[User]:
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result = await db.execute(select(User).where(User.username == username))
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user = result.scalar_one_or_none()
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if not user or not verify_password(password, user.hashed_password):
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return None
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return user
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async def get_current_user(
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token: str = Depends(oauth2_scheme),
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db: AsyncSession = Depends(get_db)
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) -> User:
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="无效的认证凭据",
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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, settings.SECRET_KEY, algorithms=[settings.ALGORITHM])
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username: str = payload.get("sub")
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if not username:
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raise credentials_exception
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except JWTError:
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raise credentials_exception
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result = await db.execute(select(User).where(User.username == username))
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user = result.scalar_one_or_none()
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if not user or not user.is_active:
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raise credentials_exception
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return user
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def require_roles(*roles: str):
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async def checker(current_user: User = Depends(get_current_user)):
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if current_user.role not in roles:
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raise HTTPException(status_code=403, detail="权限不足")
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return current_user
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return checker
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