nginx_send_file (Merb::ControllerMixin)

    # File lib/merb-core/controller/mixins/controller.rb, line 281
        def nginx_send_file(path, content_type = "")
          # Let Nginx detect content type unless it is explicitly set
          headers['Content-Type']        = content_type
          headers["Content-Disposition"] ||= "attachment; filename=#{path.split('/').last}"

          headers['X-Accel-Redirect']    = path

          return ' '
        end