string(258) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%89%93%E5%8D%B0%E8%AE%BE%E5%A4%87%E6%98%BE%E7%A4%BA%E8%84%B1%E6%9C%BA%E7%8A%B6%E6%80%81 => Failed to connect to 101.89.117.144 port 38022: Connection refused"
打印设备显示脱机状态
