84 lines
2.0 KiB
Python
84 lines
2.0 KiB
Python
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"""
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认证依赖：从JWT令牌获取当前用户
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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 OAuth2PasswordBearer
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from sqlalchemy.ext.asyncio import AsyncSession
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from database import get_async_db
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from database.models import User
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from services.auth_service import verify_token
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# OAuth2密码流配置
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl="/api/auth/login")
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async def get_current_user(
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token: str = Depends(oauth2_scheme),
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db: AsyncSession = Depends(get_async_db)
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) -> User:
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"""
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从JWT令牌获取当前用户
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Args:
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token: JWT访问令牌
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db: 数据库会话
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Returns:
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当前用户对象
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Raises:
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HTTPException: 如果令牌无效或用户不存在
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"""
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="无法验证凭据",
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headers={"WWW-Authenticate": "Bearer"},
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)
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# 验证令牌
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payload = verify_token(token)
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if payload is None:
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raise credentials_exception
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# 获取用户ID
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user_id: str = payload.get("sub")
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if user_id is None:
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raise credentials_exception
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# 检查令牌类型
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token_type = payload.get("type")
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if token_type != "access":
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raise credentials_exception
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# 从数据库获取用户
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user = await db.get(User, user_id)
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if user is None:
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raise credentials_exception
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return user
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async def get_optional_user(
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token: Optional[str] = Depends(oauth2_scheme),
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db: AsyncSession = Depends(get_async_db)
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) -> Optional[User]:
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"""
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可选用户（用于某些公开端点）
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Args:
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token: JWT访问令牌（可选）
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db: 数据库会话
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Returns:
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用户对象（如果提供了有效令牌），否则返回None
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"""
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if token is None:
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return None
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try:
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return await get_current_user(token, db)
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except HTTPException:
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return None
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