string(249) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%80%E5%A5%BD%E8%AE%B0%E7%9A%846%E4%BD%8D%E6%95%B0%E5%AF%86%E7%A0%81%E6%9C%89%E6%84%8F%E4%B9%89 => Received HTTP code 403 from proxy after CONNECT"
最好记的6位数密码有意义
