public function getHtml(){
		if( !$this->response )
			throw new RuntimeException( 'No conversion started' );
		$cacheKey	= 'premailer_'.$this->response->requestId.'.html';
		if( $this->cache && $this->cache->has( $cacheKey ) )
			return $this->cache->get( $cacheKey );
		$html	= Net_Reader::readUrl( $this->response->documents->html );
		$this->cache && $this->cache->set( $cacheKey, $html );
		return $html;
	}