string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%80%E9%9A%BE%E7%A0%B4%E8%A7%A3%E7%9A%846%E4%BD%8D%E7%BA%AF%E6%95%B0%E5%AD%97 => Received HTTP code 403 from proxy after CONNECT"
最难破解的6位纯数字
