protected function addDownload( \Aimeos\MShop\Order\Item\Base\Product\Attribute\Iface $item )
	{
		$fs = $this->getContext()->getFilesystemManager()->get( 'fs-secure' );
		$response = $this->getView()->response();
		$value = (string) $item->getValue();

		if( $fs->has( $value ) )
		{
			$name = $item->getName();

			if( pathinfo( $name, PATHINFO_EXTENSION ) == null
					&& ( $ext = pathinfo( $value, PATHINFO_EXTENSION ) ) != null
			) {
				$name .= '.' . $ext;
			}

			$response->withHeader( 'Content-Description', 'File Transfer' );
			$response->withHeader( 'Content-Type', 'application/octet-stream' );
			$response->withHeader( 'Content-Disposition', 'attachment; filename="' . $name . '"' );
			$response->withHeader( 'Content-Length', (string) $fs->size( $value ) );
			$response->withHeader( 'Cache-Control', 'must-revalidate' );
			$response->withHeader( 'Pragma', 'private' );
			$response->withHeader( 'Expires', '0' );

			$response->withBody( $response->createStream( $fs->reads( $value ) ) );
		}
		elseif( filter_var( $value, FILTER_VALIDATE_URL ) !== false )
		{
			$response->withHeader( 'Location', $value );
			$response->withStatus( 303 );
		}
		else
		{
			$response->withStatus( 404 );
		}
	}