string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%94%B5%E6%A2%AF%E9%87%8C%E5%AE%89%E8%A3%85%E6%91%84%E5%83%8F%E5%A4%B4 => Failed to connect to 14.116.215.7 port 38225: Connection refused"
电梯里安装摄像头
