Flask:已经登录后如何防止进入登录页面? [英] Flask: How to prevent to go to login page when already logged in?

问题描述

我一直在编写Miguel Grinberg编写的Flask Web开发手册，最后完成了授权蓝图.但是，我有一个问题，如果我已经登录，我仍然可以输入登录页面的URL并转到那里.如何在Flask中防止这种情况?

I have been doing the Flask Web Development Book by Miguel Grinberg, and just finished up with the authorization blueprint. Though, I am having an issue that if I am already logged in, I can still put the url of the login page and go there. How can I prevent this in Flask?

在使用Django时，我想出了django-braces库来帮助实现这一点，Flask中是否提供了此类替代方法?

While using Django, I came up with django-braces library which helps to do this, any such alternative available in Flask?

推荐答案

重定向已登录导航到登录页面的用户.

Redirect users who are logged in navigating to the login page.

要检查它们是否已经登录，请检查 current_user 代理.请注意，已登录的用户将具有 current_user.is_authenticated() 是的，虽然未登录的用户将使该方法返回False.

To check if they are already logged in, examine the current_user proxy. Note that logged-in users will have current_user.is_authenticated() equal True, while users who aren't logged in will have the method return False.

对于目的地，您有两个选择:使用redirect(request.referrer)返回到他们的上一页，或者使用redirect(url_for('view_name'))返回到其他页面之一.

You have two options for the destination: back to their previous page with redirect(request.referrer) or to one of your other pages with redirect(url_for('view_name')).

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