$additionalOptions = array (
            'content' => http_build_query( array(
                'publishparam1' => 'this is value of publishparam1',
                'publishparam2' => 'this is value of publishparam2',
                ), '', '&' ) );
        $result = @file_get_contents( $restUrl, false, $this->getStreamContext( 'PUBLISH', $additionalOptions ) );

    public function doPublishContent()
    {
        $res = new ezcMvcResult();
        // Fixme : getParsedBody() seems to return NULL even though variables are sent in the request
        $inputVariables = $this->request->getParsedBody();
        if( is_array( $inputVariables ) 
           and array_key_exists( 'deleteparam1', $inputVariables )
           and array_key_exists( 'deleteparam2', $inputVariables )
           and ( $inputVariables['deleteparam1'] === 'this is value of publishparam1' )
           and ( $inputVariables['deleteparam2'] === 'this is value of publishparam2' )
           )
        {
            $res->variables['message'] = "Received a PUBLISH request, input variables OK";
        } else
        {
            $res->variables['message'] = "Received a PUBLISH request, required input variables not received";
        }
           
        return $res;
    }