1. rails plugin install git://github.com/railsmachine/moonshine_xsendfile.git
2. In the Moonshine manifest file:
configure :xsendfile => {:x_send_file_path => '/absolute/path/to/download/url'}
recipe :xsendfile
This will work even if you have subdirectories under the /are directory.
3. In production.rb, uncomment the line:
config.action_dispatch.x_sendfile_header = "X-Sendfile" # for apache
4. In your controller:
send_file '/absolute/path/to/download/url/file.pdf', type: 'application/pdf'