ok.js

// next step: every time there is a new log, call socket.emit('newLogData')
io.on('connection', function (socket) {
  console.log('connected <-')
  // @todo: windows version
  var tail = spawn("tail", ["-f", filename]);
  tail.stdout.on("data", function (data) {
    console.log(data.toString('utf-8'))
    socket.emit('newLogData', { newLog: data.toString('utf-8') } )
  });
})