string(261) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%B6%E4%BD%9C%E4%B8%80%E4%B8%AAapp%E9%9C%80%E8%A6%81%E4%BB%80%E4%B9%88%E6%8A%80%E6%9C%AF => Failed to connect to 101.89.117.144 port 38017: Connection refused"
制作一个app需要什么技术
