python Django会话到期？
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Django session expiry?
提问by slypete
From django's documentation, I became under the impression that calling:
从 django 的文档中，我的印象是这样调用：
request.session.set_expiry(300)
from one view would cause the session to expire after five minutes inactivity; however, this is not the behavior that I'm experiencing in django trunk. If I call this method from one view, and browse around to other views that don't call the method, the session expires in five minutes. The behavior that I was expecting was a expire only after five minutes of inactivity and not simply failing to call set_expiry again before the expiry.
从一种观点来看，会导致会话在 5 分钟不活动后过期；但是，这不是我在 django 主干中遇到的行为。如果我从一个视图调用此方法，并浏览其他未调用该方法的视图，则会话将在五分钟后到期。我期望的行为是仅在五分钟不活动后过期，而不是在过期前再次调用 set_expiry 失败。
My question then is do I really need to call set_expiry in every view? If so, does there exist some decorator that may be of assistance? I can't imagine this isn't part of contrib.
我的问题是我真的需要在每个视图中调用 set_expiry 吗？如果是这样，是否存在一些可能有帮助的装饰器？我无法想象这不是 contrib 的一部分。
Thanks, Pete
谢谢，皮特
回答by SmileyChris
As the author of those methods, I can see that the documentation isn't very clear regarding this. Your observations are correct: only requests which cause the session to be altered is considered "activity".
作为这些方法的作者，我可以看到文档对此不是很清楚。您的观察是正确的：只有导致会话被更改的请求才被视为“活动”。
You can use the SESSION_SAVE_EVERY_REQUESTsetting to get the behavior you're after (at the obvious cost of the session having to being saved every request).
您可以使用该SESSION_SAVE_EVERY_REQUEST设置来获得您所追求的行为（明显的代价是必须保存每个请求的会话）。
Note : It will update the existing session record with latest expiry date.
注意：它将更新现有会话记录的最新到期日期。
回答by Mike Shultz
A simple middleware would probably do better than setting this up in every view. This is what I used.
一个简单的中间件可能比在每个视图中都设置好。这是我用的。
class SessionExpiry(object):
""" Set the session expiry according to settings """
def process_request(self, request):
if getattr(settings, 'SESSION_EXPIRY', None):
request.session.set_expiry(settings.SESSION_EXPIRY)
return None
This depends on SESSION_EXPIRYbeing set in your config. It's format is the same as request.session.set_expiry.
这取决于SESSION_EXPIRY在您的配置中设置。它的格式与request.session.set_expiry.
MIDDLEWARE_CLASSESshould be defined with this order in mind:
MIDDLEWARE_CLASSES应该按照以下顺序定义：
MIDDLEWARE_CLASSES = (
...
'django.contrib.sessions.middleware.SessionMiddleware',
'<yourproject>.<yourapp>.middleware.SessionExpiry',
...
}
It'd be nice if django.contrib.sessionstook this setting into account by default.
如果django.contrib.sessions默认情况下考虑此设置会很好。
