Stream httpndownload straight to disk.

gistfile1.rb

            Net::HTTP.start("someurl_without_the_protocol.com") do |http|
              begin
                file = open("/path/to/file.mov", 'wb')
                http.request_get('/' + URI.encode("file.mov")) do |response|
                  response.read_body do |segment|
                    file.write(segment)
                  end
                end
              ensure
                file.close
              end
            end