string(230) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%AD%A6%E6%B1%89%E6%9C%89%E5%90%8D%E7%9A%84%E7%A7%91%E6%8A%80%E5%A4%A7%E5%AD%A6 => Received HTTP code 403 from proxy after CONNECT"
武汉有名的科技大学
