如何在sessionDestroyed方法中获取请求对象？ [英] How to get request object in sessionDestroyed method?

问题描述

我需要在 sessionDestroyed 方法中的Request对象，因为我需要检索Cookie。

I am in need of Request object in sessionDestroyed method because I need to retrieve Cookies there.

public void sessionDestroyed(HttpSessionEvent httpSessionEvent) 
{
// Here I need to get Request object so that I can retrieve Cookies.
}

是否可以获得请求 object，以便我可以检索Cookie？

Is it possible to get request object so that I can retrieve Cookies there?

推荐答案

当会话被销毁时，不一定有HTTP请求的手段。它可以在超时期间被销毁，因为客户端没有发送任何请求。 30分钟。 HTTP请求将可用的唯一情况是，当您显式调用 HttpSession＃invalidate（）时，按下注销按钮。但是当你调用该方法时，你已经有一个HTTP请求在你的手。

No. There is not necessarily means of a HTTP request when the session is been destroyed. It can namely be destroyed during a timeout because the client hasn't sent any request for e.g. 30 minutes. The only case that a HTTP request would be available, is the case when you explicitly invoke HttpSession#invalidate() yourself when e.g. a logout button is been pressed. But at the moment when you invoke that method, you would already have a HTTP request at your hands. You could then just do the cookie job at the same moment instead of in a session listener.

你不清楚具体的功能要求，你错误地认为，这将是正确的解决方案，所以我不能给出一个非常适合的答案如何正确地解决。但是其中一种方法是将存储在cookie中的信息的副本存储为会话的属性。如果你需要在每个请求的基础上做，因为cookie值可以由JS在客户端操纵，例如，那么你可以使用 servlet过滤器。

You're not clear on the concrete functional requirement for which you incorrectly thought that this would be the right solution, so I can't give a well suited answer as to how to solve that properly. But one of the ways would be to just store a copy of the information stored in the cookie as an attribute of the session. If you need to do that on a per-request basis, because the cookie value could be manipulated by JS in the client side, for example, then you could use a servlet filter for this.

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