How to force download file from another service without saving this file on server with NodeJS

downloadFile.js

var Request = require('request');
app.get('/forceDownloadFile', function(req, res){
    Request
    .get('https://goo.gl/3IYOGV') // url to another service (for example: amazon);
    .on('response', function(fileRes){
        res.setHeader('Content-disposition', 'attachment; filename=helloWorld.pdf');
        res.setHeader('Content-type', resp.headers['content-type']);
        fileRes.pipe(res);

    });
});