flag_cookies_as_secure!

# File actionpack/lib/action_dispatch/middleware/ssl.rb, line 120
      def flag_cookies_as_secure!(headers)
        if cookies = headers['Set-Cookie'.freeze]
          cookies = cookies.split("\n".freeze)

          headers['Set-Cookie'.freeze] = cookies.map { |cookie|
            if cookie !~ /;\s*secure\s*(;|$)/
              "#{cookie}; secure"
            else
              cookie
            end
          }.join("\n".freeze)
        end
      end