instance method call

# File actionpack/lib/action_dispatch/middleware/ssl.rb, line 64
    def call(env)
      request = Request.new env

      if request.ssl?
        @app.call(env).tap do |status, headers, body|
          set_hsts_header! headers
          flag_cookies_as_secure! headers if @secure_cookies && !@exclude.call(request)
        end
      else
        return redirect_to_https request unless @exclude.call(request)
        @app.call(env)
      end
    end