is_the_site_still_up

https://github.com/rjspotter/is_the_site_still_up

If you're building an application that has both online and offline functionality it can be useful to know if the site is really still up (because you can't rely on navigator.onLine). This middleware allows you to poll /online or the path of your choice and return simple text or the result of a block without involving the whole application stack. Meaning, you can poll more frequently without melting your server.