string(320) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%97%E5%AD%90%E5%8F%8A%E4%BD%9C%E8%80%85%E5%88%97%E5%AD%90%E6%98%AF%E4%BB%80%E4%B9%88%E5%AD%A6%E6%B4%BE%E7%9A%84%E4%BB%A3%E8%A1%A8%E4%BA%BA%E7%89%A9%E4%B9%8B%E4%B8%80 => Received HTTP code 403 from proxy after CONNECT"
列子及作者列子是什么学派的代表人物之一
