Flask-Session sessions not storing when the session is changed inside a websocket

[chronosirius]

I have the user press a button and it is supposed to update the session, but it doesn't seem to work. I'm not sure if this is a Flask-SocketIO problem or a Flask-Session, so I am asking here and there. I updated the session inside the websocket event but later when I try to get information from the session from an HTTP request, it isn't there.

[miguelgrinberg]

If you are using Flask 2.2, try a downgrade to 2.1. There is an open issue with Flask 2.2 that I'm currently looking at. See #1856

[miguelgrinberg]

What do you mean by "redirected"? Your Socket.IO connection will break if you redirect to another page.

[chronosirius]

the client-side recieves the login-success event which is sent after the session is updated, and redirects the user to the logged in page.

[miguelgrinberg]

I don't know how to run your application. From looking at it I cannot tell what's wrong, except that using Socket.IO when you use redirects does not really make sense, and my guess is that the issue is somehow related. My recommendation is that you debug your application specifically looking at when the browser navigates to a new page and breaks the Socket.IO connection.

[chronosirius]

How would I do that?

[chronosirius]

I found a solution by adding a random session key-value pair in the view function for the login page.