string(266) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E9%9D%A2%E8%AF%95%E4%B8%AD%E5%B8%B8%E8%A7%81%E7%9A%84%E9%97%AE%E9%A2%98%E5%8F%8A%E5%9B%9E%E7%AD%94%E6%8A%80%E5%B7%A7 => Received HTTP code 403 from proxy after CONNECT"
面试中常见的问题及回答技巧
