小鱼开发
87 lines
2.4 KiB
Python
87 lines
2.4 KiB
Python
"""
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依赖注入工具
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============
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"""
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from __future__ import annotations
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from collections.abc import AsyncGenerator
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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 sqlalchemy import select
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from sqlalchemy.ext.asyncio import AsyncSession
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from app.config import get_settings
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from app.core.security import verify_access_token
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from app.db.session import get_db as db_session
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from app.models.user import User
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settings = get_settings()
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security = HTTPBearer(auto_error=False)
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# 数据库依赖
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async def get_db() -> AsyncGenerator[AsyncSession]:
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"""获取数据库 Session"""
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async for session in db_session():
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yield session
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async def get_current_user(
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credentials: HTTPAuthorizationCredentials | None = Depends(security),
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db: AsyncSession = Depends(get_db),
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) -> User:
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"""从 Authorization Header 中提取 JWT Access Token 并验证。"""
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if credentials is None:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="缺少认证信息",
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headers={"WWW-Authenticate": "Bearer"},
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)
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token = credentials.credentials
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payload = verify_access_token(token)
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if not payload or not payload.get("sub"):
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="Token 无效或已过期",
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headers={"WWW-Authenticate": "Bearer"},
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)
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user_id = payload.get("sub")
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result = await db.execute(select(User).where(User.id == user_id))
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user = result.scalar_one_or_none()
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if user is None:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="用户不存在",
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headers={"WWW-Authenticate": "Bearer"},
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)
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if not user.is_active:
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="账号已被封禁",
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headers={"WWW-Authenticate": "Bearer"},
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)
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return user
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async def get_current_user_optional(
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credentials: HTTPAuthorizationCredentials | None = Depends(security),
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db=Depends(get_db),
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) -> User | None:
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"""
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获取当前登录用户（可选，未登录返回 None）
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"""
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if credentials is None:
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return None
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try:
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return await get_current_user(credentials, db)
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except HTTPException:
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return None
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