更新

backend/auth/dependencies.py

@@ -0,0 +1,50 @@
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from models.database import get_db
+from models.models import User
+from .jwt_utils import decode_access_token
+from .roles import can_manage_users, can_write, is_admin
+
+bearer_scheme = HTTPBearer(auto_error=False)
+
+
+async def get_current_user(
+    credentials: HTTPAuthorizationCredentials = Depends(bearer_scheme),
+    db: AsyncSession = Depends(get_db),
+) -> User:
+    if not credentials or not credentials.credentials:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="未登录或令牌缺失")
+    payload = decode_access_token(credentials.credentials)
+    if not payload or not payload.get("sub"):
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="登录已过期，请重新登录")
+    try:
+        user_id = int(payload["sub"])
+    except (TypeError, ValueError):
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="无效令牌")
+
+    result = await db.execute(select(User).where(User.id == user_id))
+    user = result.scalar_one_or_none()
+    if not user or not user.is_active:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="用户不存在或已禁用")
+    return user
+
+
+async def require_admin(user: User = Depends(get_current_user)) -> User:
+    if not is_admin(user.role):
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="需要管理员权限")
+    return user
+
+
+async def require_write(user: User = Depends(get_current_user)) -> User:
+    if not can_write(user.role):
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="当前角色只读，无法执行此操作")
+    return user
+
+
+async def require_user_manager(user: User = Depends(get_current_user)) -> User:
+    if not can_manage_users(user.role):
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="需要管理员权限")
+    return user