Flask session not persistent across requests in Flask app with Gunicorn on Heroku
Looks like there were two problems:
- The
app.secret_keyshouldn't be set toos.urandom(24)because every worker will have another secret key - For some reason the dict where I stored my sessions in was sometimes empty and sometimes not... Still haven't found the reason for this though
Storing the sessions in a database instead a dictionary at runtime solves the problem.
I had a similar issue, but for me the answer was related to the cookies. A new session was being created when I opened my development environment, then another one when going to google, and a new one after a successful log in.
The problem was that my SESSION_COOKIE_DOMAIN was incorrect, and the cookie domain was being set to a different host. For my local development purposes I set SESSION_COOKIE_DOMAIN = '127.0.0.1', and use http://127.0.0.1: to access it, and it works OK now.