springsecurity sessiontimeout

Session timeout in Spring Security refers to the amount of time a user's session can remain active without any activity. When a user logs in to a web application, a session is created for that user. The session remains active until the user logs out, or until the session timeout period expires.

By default, Spring Security sets the session timeout to 30 minutes. However, this can be configured in the application's configuration file. To change the session timeout value, you need to set the `server.servlet.session.timeout` property in your `application.properties` file.

For example, to set the session timeout to 60 minutes, you can add the following line to your `application.properties` file:

server.servlet.session.timeout=60m

In addition to setting the session timeout, you can also configure Spring Security to handle session expiration. For example, you can redirect the user to a login page or display a custom message when the session expires. To do this, you need to configure the `session-management` element in your Spring Security configuration file.

<http>
    ...
    <session-management>
        <concurrency-control max-sessions="1" expired-url="/login?expired=true" />
    </session-management>
</http>

In the above example, the `max-sessions` attribute limits the user to only one session at a time. If the user tries to open a new session, the previous session will be invalidated. The `expired-url` attribute specifies the URL to redirect the user to when the session expires. In this case, the user will be redirected to the login page with a query parameter indicating that the session has expired.