How to implement a file download with Node.js's fs module and express

Question

Because the file should be generated dynamically, maybe I should use the fs modules\'s writeStream. But I couldn\'t find any example codes with my poor googling. Sorry.

Answer 1

With the express, I can implement like this.

app.get('/down2', function(req, res){
  var filename = 'data.csv';
  res.attachment(filename);
  res.end('hello,world\nkeesun,hi', 'UTF-8'); //Actually, the data will be loaded form db.
});

How simple is it. Thanks.