获取四层转发源站列表

{
    "code": 0,
    "data": [
        {
            "content": "string",
            "created_at": "string",
            "id": 0,
            "port": 0,
            "stream_id": 0,
            "updated_at": "string",
            "weight": 0
        }
    ],
    "message": "string"
}