After the request works its way through the chain and is processed by the server, a response is sent back through the chain in reverse order.
在这个请求设法通过过滤器链并被服务器处理之后,一个响应将以相反的顺序通过该链发送回去。
2
Each stack frame holds a pointer to the previous stack frame (called the backchain pointer), as well as a space for return addresses for when it calls other functions.