string(256) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E8%BD%AF%E4%BB%B6%E6%98%AF%E6%80%8E%E4%B9%88%E5%BC%80%E5%8F%91%E5%87%BA%E6%9D%A5%E7%9A%84 => Failed to connect to 14.18.117.71 port 38069: Connection refused"
软件是怎么开发出来的
