string(233) "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%8A%8Acad%E6%96%87%E4%BB%B6%E6%B8%85%E7%90%86%E5%B9%B2%E5%87%80 => Received HTTP code 403 from proxy after CONNECT"
怎么把cad文件清理干净
