Controller

A controller resource is like a procedure, this is typically used when a resource cannot be mapped to standard CRUD (create, retrieve, update, and delete) functions.

The names for controllers appear as the last segment in a URI path with no child resources. If the controller requires parameters, these would typically be included in the query string:

POST /cats/1/feed           -> Feed cat 1 
POST /cats/1/feed?food=fish ->Feed cat 1 a fish 

When defining a controller name we should always use a verb. A verb is a word that indicates an action or a state of being, such as feed or send.