string(292) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E4%B9%88%E6%A3%80%E6%B5%8B%E9%98%B2%E7%AA%9C%E8%B4%A7%E9%9A%90%E5%BD%A2%E7%A0%81%E6%98%AF%E5%90%A6%E6%AD%A3%E5%B8%B8 => Failed to connect to 14.18.117.71 port 38093: Connection refused"
怎么检测防窜货隐形码是否正常
