string(251) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=cad%E6%96%87%E4%BB%B6%E8%BF%87%E5%A4%A7%E6%B8%85%E7%90%86%E6%8F%92%E4%BB%B6%E4%B9%9F%E6%B2%A1%E7%94%A8 => Received HTTP code 403 from proxy after CONNECT"
cad文件过大清理插件也没用
