Plone 4中是否有一些注销挂钩？(Is there some logout hook in Plone 4?)

 我有一个基于Plone-4.3的站点，可以访问另一个站点：当有人登录到我的站点时，他可以点击特殊的超链接并进入那个站点，而无需在那里输入密码基于ReST接口的某种简单的SSO）。 
 
 现在，我需要从其他站点注销用户，无论何时他从我自己的站点注销，例如发送一个特殊的请求，这当然不是这个问题的主题（可能它仍然需要实施，因为会话过期曾经足够好。） 
 
 我将如何实现这一点，具体如下： 我将在哪里挂钩次要注销代码？ 有没有某种注销挂钩，或者我应该修改一些logout.[c]py view？ 我无法在此处的“ 事件类型”部分找到没有提及的事件和类别。 

I have a Plone-4.3-based site which provides access to another site as well: Whenever someone logs in to my site, (s)he can click on special hyperlinks and proceed to that other site without the need to enter a password there (some kind of simple SSO, based on a ReST interface).
 
Now I have the need to logout the user from that other site whenever (s)he logs out from my own site, e.g. by sending a special request which is of course not the topic of this question (perhaps it still needs to be implemented, because session expiration used to be good enough.)
 
How would I accomplish this, to be precise: Where would I hook in that secondary logout code? Is there some kind of logout hook, or should I modify some logout.[c]py view? I couldn't find no event nor category mentioned in the Event types section here.

原文：https://stackoverflow.com/questions/43852342