instance method call

# File actionpack/lib/action_controller/session/cookie_store.rb, line 96
      def call(env)
        prepare!(env)
        
        status, headers, body = @app.call(env)

        session_data = env[ENV_SESSION_KEY]
        options = env[ENV_SESSION_OPTIONS_KEY]
        request = ActionController::Request.new(env)
        
        if !(options[:secure] && !request.ssl?) && (!session_data.is_a?(AbstractStore::SessionHash) || session_data.loaded? || options[:expire_after])
          session_data.send(:load!) if session_data.is_a?(AbstractStore::SessionHash) && !session_data.loaded?

          persistent_session_id!(session_data)
          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

          Rack::Utils.set_cookie_header!(headers, @key, cookie.merge(options))
        end

        [status, headers, body]
      end