string(212) "get document error:https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9F%AD%E8%B7%AF%E5%92%8C%E6%96%AD%E8%B7%AF%E5%AE%9A%E4%B9%89 => Received HTTP code 403 from proxy after CONNECT"
短路和断路定义网!