from datetime import datetime, timedelta
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from typing import Annotated
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from fastapi import Depends, HTTPException, status
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from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
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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 app.config import settings
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from app.database import get_db
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from app.models import User
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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bearer = HTTPBearer(auto_error=False)
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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(user_id: int, role: str) -> str:
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expire = datetime.utcnow() + timedelta(hours=settings.jwt_expire_hours)
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payload = {"sub": str(user_id), "role": role, "exp": expire}
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return jwt.encode(payload, settings.jwt_secret, algorithm=settings.jwt_algorithm)
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def get_current_user(
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creds: Annotated[HTTPAuthorizationCredentials | None, Depends(bearer)],
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db: Annotated[Session, Depends(get_db)],
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) -> User:
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if not creds or not creds.credentials:
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raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="未登录")
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try:
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payload = jwt.decode(
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creds.credentials, settings.jwt_secret, algorithms=[settings.jwt_algorithm]
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)
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user_id = int(payload.get("sub", 0))
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except (JWTError, ValueError):
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raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="无效令牌")
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user = db.get(User, user_id)
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if not user or not user.is_active:
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raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="用户不可用")
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return user
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def require_admin(user: Annotated[User, Depends(get_current_user)]) -> User:
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if user.role != "admin":
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raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="需要管理员权限")
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return user
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