string(284) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%9B%91%E6%8E%A7%E7%A0%81%E7%8E%87%E7%B1%BB%E5%9E%8B%E5%8F%98%E7%A0%81%E7%8E%87%E5%92%8C%E5%AE%9A%E7%A0%81%E7%8E%87 => Failed to connect to 101.91.112.32 port 38221: Connection refused"
监控码率类型变码率和定码率
