Apache Reference: mod_actions
mod_actions - Content Selection by Content Types and Request Methods
Since Apache 1.1, src/modules/standard/mod_actions.c
Alexei Kosut (1996)
mod_actions provides a way to trigger a CGI script when a specific MIME content type of a document is encountered or when the request uses a specific HTTP method. This module can be used to create dynamic content when specific documents are requested or to implement special extensional HTTP methods (such as PUT) via CGI scripts.