string(233) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=wifi%E4%BF%A1%E5%8F%B7%E4%B8%8A%E6%9C%89%E4%B8%AA6%E6%98%AF%E5%95%A5 => Failed to connect to 14.18.46.51 port 38044: Connection refused"
wifi信号上有个6是啥
