Last night I had some insomnia, so I wrote a gem.
Here it is: https://github.com/steveklabnik/request_store.
If you're using
Thread.current in your Rails app to store global-ish data,
don't do it! If you use Thin or Puma or a threaded web server, it won't get
reset between requests, and you'll end up with subtle bugs. So do this instead:
Thread.current[:foo] = 1
RequestStore.store[:foo] = 1
And things will be peachy keen.
If you're not using Rails,
use RequestStore::Middleware to make it work. If
you are using Rails, a Railtie takes care of it for you.