41 lines
1.6 KiB
Python
41 lines
1.6 KiB
Python
"""
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路由公共依赖。
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提供“可选登录”依赖与权限判断工具：
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- 文章可见性控制需要区分“游客”和“登录用户”
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- 携带有效令牌时返回用户，未携带令牌时返回 None
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"""
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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 HTTPAuthorizationCredentials
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from sqlalchemy.orm import Session
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from ..auth import bearer_scheme, decode_token
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from ..database import get_db
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from ..models import ROLE_BLOGGER, ROLE_FRIEND, User
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def get_optional_user(
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credentials: HTTPAuthorizationCredentials = Depends(bearer_scheme),
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db: Session = Depends(get_db),
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) -> Optional[User]:
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"""可选登录依赖：未携带令牌返回 None；令牌无效返回 401；否则返回当前用户。"""
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if credentials is None:
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return None
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payload = decode_token(credentials.credentials)
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try:
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user_id = int(payload.get("sub"))
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except (TypeError, ValueError):
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raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="令牌无效")
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user = db.query(User).filter(User.id == user_id).first()
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# 令牌版本校验：与 get_current_user 保持一致，密码重置后旧令牌失效
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if user is not None and (payload.get("ver") or 0) != (user.token_version or 0):
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raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="登录状态已失效，请重新登录")
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return user
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def can_read_friend_article(user: Optional[User]) -> bool:
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"""判断用户是否具备查看好友文章的权限（friend / blogger）。"""
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return user is not None and user.role in (ROLE_FRIEND, ROLE_BLOGGER) |