Node.js and Express - Redirect after Login and Download

I have an express app that allows a user to login and download data files. There is also a home page after the login. If a user enters the URL to a specific file without logging in, the app will first ask the user to login, which is by design. However, after the user logs in, the file is downloaded without redirecting the user to the home page. I was wondering if there's a way to allow the user to login, redirect to the home page, and then download the file with one click after the user logs in. It's kind of confusing now because the user is stuck on the login page after successfully logging in and downloading the file. Below is a snippet of the code. I am using express 4.x:

app.get('/dat/:file(*)', routes.ensure_authenticated, function(req, res, next) {
  var path = __dirname + '/public/dat/' + req.params.file;
  res.download(path);
});
app.use('/', serveStatic(__dirname + '/public'));

// dat directory requests
app.use('/dat', routes.ensure_authenticated, serveIndex( 'public/dat', { icons: true }));