string(248) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BB%BA%E8%AE%BE%E6%B3%95%E8%A7%84%E6%95%99%E6%9D%90%E7%AD%94%E6%A1%88%E5%88%98%E9%BB%8E%E8%99%B9 => Received HTTP code 403 from proxy after CONNECT"
建设法规教材答案刘黎虹
