NodeJS sendFile with File Name in download

Question

I try to send file to client with this code:

router.get('/get/myfile', function (req, res, next) {
  res.sendFile("/other_file_name.dat");
});

it's work fine but I need that when user download this file from the url:

http://mynodejssite.com/get/myfile

the filename into the browser must be "other_file_name.dat" and not "myfile".

Answer 1

there is a specialized method res.download

which covers all for you ;)

router.get('/get/myfile', function (req, res) {
    res.download("/file_in_filesystem.dat", "name_in_browsers_downloads.dat");
});

Answer 2

This is my solution:

var fs = require('fs');
var path = require('path');
const transfer = exports;

transfer.responseFile = function (basePath, fileName, res) {
    var fullFileName = path.join(basePath, fileName);

    fs.exists(fullFileName, function (exist) {
        if (exist) {
            var filename = path.basename(fullFileName);

            res.setHeader('Content-Disposition', 'attachment; filename=' + filename);
            res.setHeader('Content-Transfer-Encoding', 'binary');
            res.setHeader('Content-Type', 'application/octet-stream');

            res.sendFile(fullFileName)
        } else {
            res.sendStatus(404);
        }
    });
};

and use it:

router.get('/myfile', function (req, res) {
    transfer.responseFile("/var/nodejs", 'fileToDownload.dat', res);
});

Thank you to all helpers :)