string(238) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%AD%A3%E8%A7%84%E7%9F%AD%E4%BF%A1%E8%90%A5%E9%94%80%E6%A1%88%E4%BE%8B => Failed to connect to 14.18.117.71 port 38220: Connection refused"
正规短信营销案例
