Force file download with Nginx

For a long time, I've tried to force file download by modifying "Content-type" in headers. Unfortunately it's not a safe solution.

The best way I've found is to send the content as an "attachment" (using "Content-Disposition" header).

This is a sample config to do this with Nginx:

server {
    listen 80;
    server_name my.domain.com;
    location ~ ^.*/(?P<request_basename>[^/]+\.(mp3))$ {
        root /path/to/mp3/
        add_header Content-Disposition 'attachment; filename="$request_basename"';
    }
}