Flask

Client-side Sessions in Flask

Sessions in Flask can be considered "client-side", as sessions are stored client-side in browser cookies.

Pros:

1. Validating and creating sessions is fast (no data storage)
2. Easy to scale (no need to replicate session data across web servers)

Cons:

1. Sensitive data cannot be stored in session data, as it’s stored on the web browser
2. Session data is limited by the size of the cookie (usually 4 KB)
3. Sessions cannot be immediately revoked by the Flask app

For more, review Sessions in Flask.