For some reason, $HTTP_RAW_POST_DATA does not seem to be set inside an action controller. You'll have to use the php://input stream wrapper to access raw http post data:
$raw_post_data = file_get_contents('php://input');Keyword - controller
Wednesday 21 November 2007, 12:03
Accessing raw post data in a controller
By Geoffrey - Coding - Permalink
Saturday 14 July 2007, 13:33
A Zend controller plugin to enable RESTful behaviour
By Geoffrey - Coding - Permalink
This is a simple controller plugin for the Zend Framework which enable RESTful behaviour. It basically adds the HTTP method name to the action name, so that the URL http://example.com/foo/bar will be dispatched to FooController::barGetAction on a GET, FooController::barPostAction on a POST, etc.