string(293) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E5%BB%BA%E6%95%99%E6%9D%90%E9%87%8C%E7%9A%84%E6%A1%88%E4%BE%8B%E6%98%AF%E4%B8%8D%E6%98%AF%E5%BE%80%E5%B9%B4%E8%80%83%E8%AF%95%E9%A2%98 => Received HTTP code 403 from proxy after CONNECT"
二建教材里的案例是不是往年考试题
