string(232) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%BB%BA%E7%AD%91%E4%BA%91%E8%AF%BE%E6%95%99%E5%B8%88%E7%AB%AFapp => Failed to connect to 14.116.215.7 port 38230: Connection refused"
建筑云课教师端app
