call (ActionController::Session::CookieStore)

    # File lib/action_controller/session/cookie_store.rb, line 89
          def call(env)
            env[ENV_SESSION_KEY] = AbstractStore::SessionHash.new(self, env)
            env[ENV_SESSION_OPTIONS_KEY] = @default_options.dup

            status, headers, body = @app.call(env)

            session_data = env[ENV_SESSION_KEY]
            options = env[ENV_SESSION_OPTIONS_KEY]

            if !session_data.is_a?(AbstractStore::SessionHash) || session_data.send(:loaded?) || options[:expire_after]
              session_data.send(:load!) if session_data.is_a?(AbstractStore::SessionHash) && !session_data.send(:loaded?)
              session_data = marshal(session_data.to_hash)

              raise CookieOverflow if session_data.size > MAX

              cookie = Hash.new
              cookie[:value] = session_data
              unless options[:expire_after].nil?
                cookie[:expires] = Time.now + options[:expire_after]
              end

              cookie = build_cookie(@key, cookie.merge(options))
              unless headers[HTTP_SET_COOKIE].blank?
                headers[HTTP_SET_COOKIE] << "\n#{cookie}"
              else
                headers[HTTP_SET_COOKIE] = cookie
              end
            end

            [status, headers, body]
          end