64 lines
2.3 KiB
Python
64 lines
2.3 KiB
Python
"""JWT 认证 + 权限控制"""
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from datetime import datetime, timedelta
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from typing import Optional
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from fastapi import Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer
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from jose import JWTError, jwt
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from passlib.context import CryptContext
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from sqlalchemy.orm import Session
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from database import get_db
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from models import User, UserRole
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from config import SECRET_KEY, ALGORITHM, ACCESS_TOKEN_EXPIRE_MINUTES
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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 hash_password(password: str) -> str:
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return pwd_context.hash(password)
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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 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=ACCESS_TOKEN_EXPIRE_MINUTES))
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to_encode.update({"exp": expire})
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return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
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def get_current_user(token: str = Depends(oauth2_scheme), db: Session = Depends(get_db)) -> User:
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"""从 JWT token 解析当前用户"""
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="登录已过期，请重新登录",
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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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sub = payload.get("sub")
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if sub is None:
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raise credentials_exception
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user_id = int(sub)
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except (JWTError, ValueError, TypeError):
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raise credentials_exception
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user = db.query(User).filter(User.id == user_id).first()
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if user is None or not user.is_active:
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raise credentials_exception
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return user
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def require_role(*roles: UserRole):
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"""权限装饰器：要求当前用户具有指定角色之一"""
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def role_checker(current_user: User = Depends(get_current_user)):
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if current_user.role not in [r.value for r in roles] and current_user.role not in roles:
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raise HTTPException(
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status_code=status.HTTP_403_FORBIDDEN,
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detail="权限不足"
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)
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return current_user
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return role_checker
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