Initial commit: 浼佷笟寰俊 AI 鏈哄櫒浜哄姪鐞?MVP

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/deps.py

@@ -0,0 +1,30 @@
+"""依赖：get_db、JWT 校验。"""
+from fastapi import Depends, HTTPException, status
+from fastapi.security import HTTPAuthorizationCredentials, HTTPBearer
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.database import get_db
+from app.models import User
+from app.services.auth_service import decode_access_token
+
+security = HTTPBearer(auto_error=False)
+
+
+async def get_current_user(
+    db: AsyncSession = Depends(get_db),
+    credentials: HTTPAuthorizationCredentials | None = Depends(security),
+) -> User:
+    if not credentials:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="未提供认证信息")
+    subject = decode_access_token(credentials.credentials)
+    if not subject:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="无效或已过期的 token")
+    # subject 存 username
+    r = await db.execute(select(User).where(User.username == subject))
+    user = r.scalar_one_or_none()
+    if not user:
+        raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="用户不存在")
+    if not user.is_active:
+        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN, detail="账号已禁用")
+    return user