I found a handy tool for making a websocket right on your shell.
It is websocketd : http://websocketd.com/

Its phisolophy is so simple :

Just read incoming text from stdin and write outgoing text to stdout. Messaging is simple.

Read its docs, I follow the ez tutorial 10 second tutorial and see how cool does it work.
Let make something cool with this, we got a UNIX tool that print out to stdout in real-time with changes of end file.

Ok cool, change the command to

websocketd --port=8080 tail -f logs/web_access.log

Tada ! Open the webpage that listens the websocket you made and see the magic :D You can tracking access log of website or system in real-time way.