string(223) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad2016%E6%89%93%E4%B8%8D%E5%BC%80dwg%E6%96%87%E4%BB%B6 => Failed to connect to 101.89.117.144 port 38056: Connection refused"
cad2016打不开dwg文件
