string(230) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%80%8E%E6%A0%B7%E6%B8%85%E9%99%A4%E7%94%B5%E8%84%91%E7%9A%84%E5%86%85%E5%AD%98 => Received HTTP code 403 from proxy after CONNECT"
怎样清除电脑的内存
