call

# File actionpack/lib/action_controller/session/abstract_store.rb, line 122
      def call(env)
        session = SessionHash.new(self, env)

        env[ENV_SESSION_KEY] = session
        env[ENV_SESSION_OPTIONS_KEY] = @default_options.dup

        response = @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?)

          sid = options[:id] || generate_sid

          unless set_session(env, sid, session_data.to_hash)
            return response
          end

          cookie = Rack::Utils.escape(@key) + '=' + Rack::Utils.escape(sid)
          cookie << "; domain=#{options[:domain]}" if options[:domain]
          cookie << "; path=#{options[:path]}" if options[:path]
          if options[:expire_after]
            expiry = Time.now + options[:expire_after]
            cookie << "; expires=#{expiry.httpdate}"
          end
          cookie << "; Secure" if options[:secure]
          cookie << "; HttpOnly" if options[:httponly]

          headers = response[1]
          unless headers[SET_COOKIE].blank?
            headers[SET_COOKIE] << "\n#{cookie}"
          else
            headers[SET_COOKIE] = cookie
          end
        end

        response
      end