请求前烧瓶 - 为特定路线添加例外 [英] flask before request - add exception for specific route

问题描述

在 before_request() 函数(如下)中，如果用户尚未登录，我想将用户重定向到 /login.是否有一个特殊的变量会给我提供如下示例所示的当前 URL 吗?

In the before_request() function (below), I want to redirect the user to /login if they are not yet logged in. Is there a special variable that will give me the current URL that will work as the below example does?

@app.before_request
def before_request():
    # the variable current_url does not exist
    # but i want something that works like it
    if (not 'logged_in' in session) and (current_url != '/login'):
        return redirect(url_for('login'))

我需要检查当前 URL 是否为 /login，因为如果我不这样做，服务器将进入无限循环.

I need to check that the current URL is /login, because if I don't the server goes into an infinite loop.

推荐答案

您可以检查请求对象上的几个属性，记录在 这里，request.path 可能就是你想要的.我可以建议 request.endpoint，因此如果您决定将视图路由到另一个 url 或多个 url，您将被覆盖

There are a couple of properties on the request object you can check, documented here, request.path is probably what you want. Can I suggest request.endpoint though, so you'll be covered should you decide to route your view to another url, or multiple urls

@app.before_request
def before_request():
    if 'logged_in' not in session and request.endpoint != 'login':
        return redirect(url_for('login'))

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