116 lines
4.8 KiB
Python
116 lines
4.8 KiB
Python
from datetime import datetime, timedelta
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from typing import Optional
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import jwt
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from fastapi import Depends, HTTPException, status
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from fastapi.security import OAuth2PasswordBearer
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from passlib.context import CryptContext
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from sqlalchemy.orm import Session
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from app.core.config import settings
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from app.db import get_db
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from app.models.session import UserSession
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# 密码哈希配置（使用 bcrypt）
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pwd_context = CryptContext(schemes=["bcrypt"], deprecated="auto")
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oauth2_scheme = OAuth2PasswordBearer(tokenUrl=f"{settings.API_V1_STR}/auth/login")
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def verify_password(plain_password: str, hashed_password: str) -> bool:
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# 验证明文密码与哈希是否匹配
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return pwd_context.verify(plain_password, hashed_password)
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def get_password_hash(password: str) -> str:
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# 对密码进行哈希
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return pwd_context.hash(password)
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def create_access_token(subject: str, device_id: str, expires_delta: Optional[timedelta] = None) -> str:
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# 创建 JWT 访问令牌，默认过期时间从配置读取
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expire = datetime.utcnow() + (expires_delta or timedelta(minutes=getattr(settings, "ACCESS_TOKEN_EXPIRE_MINUTES", 60)))
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# 将 device_id 写入 Token Payload
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to_encode = {"sub": subject, "device_id": device_id, "exp": expire}
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return jwt.encode(to_encode, settings.SECRET_KEY, algorithm="HS256")
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def get_current_user(token: str = Depends(oauth2_scheme), db: Session = Depends(get_db)) -> str:
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"""
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验证 JWT Token 并返回当前用户名 (sub)
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增加 Session 强校验：检查数据库中 Session 是否活跃
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"""
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print("="*60)
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print("[get_current_user] 开始验证 Token")
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print(f" - Token (前30字符): {token[:30]}...")
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credentials_exception = HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="无效的认证凭据",
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headers={"WWW-Authenticate": "Bearer"},
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)
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# 1. 解析 Token
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try:
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payload = jwt.decode(token, settings.SECRET_KEY, algorithms=["HS256"])
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username: str = payload.get("sub")
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device_id: str = payload.get("device_id")
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print(f"[get_current_user] ✓ Token 解析成功")
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print(f" - username: {username}")
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print(f" - device_id: {device_id}")
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print(f" - exp: {payload.get('exp')}")
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if username is None:
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print("[get_current_user] ✗ username 为空")
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raise credentials_exception
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except jwt.ExpiredSignatureError:
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print("[get_current_user] ✗ Token 已过期")
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raise credentials_exception
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except jwt.InvalidTokenError as e:
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print(f"[get_current_user] ✗ Token 无效: {e}")
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raise credentials_exception
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except jwt.PyJWTError as e:
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print(f"[get_current_user] ✗ Token 解析失败: {e}")
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raise credentials_exception
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# 2. Session 强校验 (如果有 device_id)
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# 如果 Token 是旧版本没有 device_id，可以选择放行或拒绝。为了安全建议逐步拒绝。
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# 这里我们假设所有新 Token 都有 device_id
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if device_id:
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print(f"[get_current_user] 开始 Session 强校验")
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# 查询 User ID
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from app.models.user import User
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user = db.query(User).filter(User.username == username).first()
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if not user:
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print(f"[get_current_user] ✗ 用户不存在: {username}")
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raise credentials_exception
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print(f"[get_current_user] ✓ 用户存在: user_id={user.id}")
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# 查询活跃 Session
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print(f"[get_current_user] 查询活跃 Session: user_id={user.id}, device_id={device_id}")
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session = db.query(UserSession).filter(
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UserSession.user_id == user.id,
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UserSession.device_id == device_id,
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UserSession.active == True
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).first()
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if not session:
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# Session 不存在或已失效（被踢下线/登出）
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print(f"[get_current_user] ✗ Session 不存在或已失效")
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# 调试：列出该用户的所有 Session
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all_sessions = db.query(UserSession).filter(UserSession.user_id == user.id).all()
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print(f"[get_current_user] 该用户共有 {len(all_sessions)} 个 Session:")
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for s in all_sessions:
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print(f" - session_id={s.id}, device_id={s.device_id}, active={s.active}")
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raise HTTPException(
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status_code=status.HTTP_401_UNAUTHORIZED,
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detail="会话已失效或在其他设备登录",
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headers={"WWW-Authenticate": "Bearer"},
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)
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print(f"[get_current_user] ✓ Session 验证通过: session_id={session.id}")
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else:
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print(f"[get_current_user] ⚠️ Token 中没有 device_id，跳过 Session 校验")
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print("="*60)
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return username
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