A website built in Common Lisp using Caveman2 as its framework. It is based on a collection of tutorials written by hyotang666. Those tutorials are based on chapters from the book 'Basic Ruby on Rails'. hyotang666 ported the Ruby code to Common Lisp.
This was hard to follow because the translation was quite bad. The
gist of was use 'throw-code' for quick and basic relay of error (using
HTTP response codes) and use 'on-exception' method to generate a more
involved HTML page to communicate the error (HTTP response code). At
least, I think that was the take-away.