timeout = require('connect-timeout')

app.get('/', timeout('5s'), function(req, res){
  ##DO SOMETHING 1
  ##DO SOMETHING 2
  ##DO SOMETHING 3
  res.send('ok'); ##line 7
});

app.get('/', timeout('5s'), function(req, res){
  ##DO SOMETHING 1
  ##DO SOMETHING 2
  ##DO SOMETHING 3
  if (!req.timedout) {
    res.send('ok'); ##line 7
  }
});

app.use(function(req,res,next){
  var _send = res.send;
  var sent = false;
  res.send = function(data){
      if(sent) return;
      _send.bind(res)(data);
      sent = true;
  };
  next();
});