Request.php

<?php
class REST_Request extends Zend_Controller_Request_Http
{
    private $_error = false;

    public function setError($code, $message)
    {
        $this->_error = new stdClass;
        $this->_error->code = $code;
        $this->_error->message = $message;

        return $this;
    }

    public function getError()
    {
        return $this->_error;
    }

    public function hasError()
    {
        return $this->_error !== false;
    }

    public function getMethod()
    {
        if ($this->getParam('_method', false)) {
            return strtoupper($this->getParam('_method'));
        }

        if ($this->getHeader('X-HTTP-Method-Override')) {
            return strtoupper($this->getHeader('X-HTTP-Method-Override'));
        }

        return $this->getServer('REQUEST_METHOD');
    }

    public function dispatchError($code, $message)
    {
        $this->setError($code, $message);

        $this->setControllerName('error');
        $this->setActionName('error');
        $this->setDispatched(true);
    }
}