はてなブックマーク

{ :type => 'application/octet-stream'.freeze, :disposition => 'attachment'.freeze, :stream => true, :buffer_size => 8192 }.freeze Send binary data to the user as a file download. May set content type, apparent file name, and specify whether to show data inline or download as an attachment. Options: :filename - Suggests a filename for the browser to use. :type - specifies an HTTP content type. Defa