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Operating System: CentOS7
-
download websocketd
websocketd-0.3.0-linux_amd64.zip -
install nc command
yum install nmap-ncat
- Create a listening script
cat > cmd.sh <<-END
#!/bin/bash
pkill -x nc
while :; do
nc -nkl 10088
sleep 1
done
- create log.html
<!DOCTYPE html> [13/1477]
<html>
<head>
<style>
body{
background-color: #0e1012;color: #ffffff;
}
*{
margin: 0; padding: 0;
}
#msg{
overflow:auto; border:2px solid #303030; color:#ffffff; background-color: #2b2b2b; font-size: 13px; position: absolute; left: 8px; right: 8px; bottom: 8px; top: 40px; word-break:
break-all;
}
#log{
position: fixed; top: 0; left: 0; width: 100%; height: 40px; text-align: left; margin: 4px 0 0 8px;
}
#log b{
font-size: 26px;
}
#msgBtn{
padding: 5px 10px; border: none; background: #777; float: right; margin: 0 16px 0 0;
}
</style>
</head>
<body>
<div id="log"><span><b>实时日志</b></span><button id="msgBtn" type="button">清空</button></div>
<div id="msg"><ul class="list"></ul></div>
<script src="http://libs.baidu.com/jquery/1.9.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
if (!window.WebSocket) {
if (window.MozWebSocket) {
window.WebSocket = window.MozWebSocket;
} else {
$('#msg').append("<p>你的浏览器不支持websocket</p>");
}
}
var ws = new WebSocket('ws://221.7.197.100:8008/websocket/');
ws.onopen = function(evt) {
$('.list').append('<li>websocket连接成功</li>');
}
ws.onmessage = function(evt) {
$('.list').append('<li>' + evt.data + '</li>');
setTimeout(function(){$('#msg').scrollTop($('.list').height()-$('#msg').height());}, 100)
}
$("#msgBtn").click(function(){
$(".list").html("");
})
});
</script>
</body>
</html>
- file deployment location
websocketd/
├── [-rwxr-xr-x] cmd.sh
├── [drwxr-xr-x] websocket
│ └── [-rw-r--r--] log.html
└── [-rwxr-xr-x] websocketd
- start websocketd
cd websocketd
./websocketd --port=8008 --staticdir=. ./cmd.sh
-
Open the log browsing page in the browser: http://{websocket-server}:8008/websocket/log.html
-
On other application servers, transmit real-time logs
tail -f /tomcat/logs/catalina.out | nc -n {websocket-server} 10088
- Turn off real-time logs
- kill nc in the target server
pkill -x nc- kill nc in websocket server
pkill -x nc- Refresh the log browsing page of the browser directly