Auto start file download after form submission

Question

I have a web form that users complete online. When they press submit it will start a file download for them.

At the moment, I process the form submission and generat

Answer 1

Add a second page that says something "thank you, your donwnload will start in a few seconds" and triggers the download using javascript:

$(document).ready(function(){
  window.setTimeout(function(){
    window.location = 'http://yourdownloadhost.com/file.zip';
  }, 1500);
});

or use a meta redirect.