html page to tail system.log over websockets

index.html

<script src="/socket.io/socket.io.js"></script>
<script type="text/javascript">
var socket = new io.Socket();

socket.connect();
socket.on('connect',
          function(){
              console.log('connected');
              socket.send('/var/log/system.log');
          });

socket.on('message', function(data){
              console.log('messaged');
              if (data) {
                  $('fin').scrollTo();
                  $('mid').insert(data);
                  $('mid').insert("<br/>");
              }
          });

socket.on('disconnect', function(){ alert('disconnected'); });

</script>