Tip for changing cookie subdomains: change the cookie name too. This is a really useful tip I hadn’t encountered before. If you make a change to the way cookies are configured—changing the cookie domain or path for example—it’s a good idea to change the name of the cookie as well. If you don’t change the cookie name you’ll see weird behaviour for users who have previously had the cookie set using the older configuration. This definitely explains bugs I’ve seen in the past. Filing this tip away for future cookie-related development work.
Recent articles
- Distributing Go binaries like sqlite-scanner through PyPI using go-to-wheel - 4th February 2026
- Moltbook is the most interesting place on the internet right now - 30th January 2026
- Adding dynamic features to an aggressively cached website - 28th January 2026