string(252) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%BB%9C%E7%9A%84ping%E5%80%BC%E9%AB%98%E5%A5%BD%E8%BF%98%E6%98%AF%E4%BD%8E%E7%9A%84%E5%A5%BD => Received HTTP code 403 from proxy after CONNECT"
网络的ping值高好还是低的好
