string(242) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=app%E5%BC%80%E5%8F%91%E5%92%8C%E5%88%B6%E4%BD%9C%E6%B5%81%E7%A8%8B%E5%9B%BE => Failed to connect to 101.91.112.32 port 38221: Connection refused"
app开发和制作流程图
