string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E6%A0%B7%E8%A7%A3%E5%86%B3%E6%89%93%E5%8D%B0%E6%9C%BA%E8%84%B1%E6%9C%BA%E7%8A%B6%E6%80%81%E9%97%AE%E9%A2%98 => Failed to connect to 101.89.117.144 port 38017: Connection refused"
怎样解决打印机脱机状态问题
