string(234) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E7%9B%B4%E6%8E%A5%E6%89%93%E4%B8%8D%E5%BC%80%E5%9B%BE%E7%BA%B8 => Failed to connect to 101.89.159.206 port 38087: Connection refused"
cad直接打不开图纸
