附件下载完怎么打不开，不是pdf文件么

方法一，是不是要打开json文件，我打开后，内容是{"recorder":{"recorder":58387},"studio":{"debug":58314,"webservice":58426,"async_msg":58055},"assistant":{"playback_web":57954,"playback_java":57991,"webservice":58487,"websocket":58571}}。这里边的"websocket"后边带着的“58571”就是端口名么？第二个问题，怎么修改端口号