public static function download_file_xsendfile( $file_path, $filename ) {
		$parsed_file_path = self::parse_file_path( $file_path );

		/**
		 * Fallback on force download method for remote files. This is because:
		 * 1. xsendfile needs proxy configuration to work for remote files, which cannot be assumed to be available on most hosts.
		 * 2. Force download method is more secure than redirect method if `allow_url_fopen` is enabled in `php.ini`. We fallback to redirect method in force download method anyway in case `allow_url_fopen` is not enabled.
		 */
		if ( $parsed_file_path['remote_file'] && ! apply_filters( 'woocommerce_use_xsendfile_for_remote', false ) ) {
			do_action( 'woocommerce_download_file_force', $file_path, $filename );
			return;
		}

		if ( function_exists( 'apache_get_modules' ) && in_array( 'mod_xsendfile', apache_get_modules(), true ) ) {
			self::download_headers( $parsed_file_path['file_path'], $filename );
			$filepath = apply_filters( 'woocommerce_download_file_xsendfile_file_path', $parsed_file_path['file_path'], $file_path, $filename, $parsed_file_path );
			header( 'X-Sendfile: ' . $filepath );
			exit;
		} elseif ( stristr( getenv( 'SERVER_SOFTWARE' ), 'lighttpd' ) ) {
			self::download_headers( $parsed_file_path['file_path'], $filename );
			$filepath = apply_filters( 'woocommerce_download_file_xsendfile_lighttpd_file_path', $parsed_file_path['file_path'], $file_path, $filename, $parsed_file_path );
			header( 'X-Lighttpd-Sendfile: ' . $filepath );
			exit;
		} elseif ( stristr( getenv( 'SERVER_SOFTWARE' ), 'nginx' ) || stristr( getenv( 'SERVER_SOFTWARE' ), 'cherokee' ) ) {
			self::download_headers( $parsed_file_path['file_path'], $filename );
			$xsendfile_path = trim( preg_replace( '`^' . str_replace( '\\', '/', getcwd() ) . '`', '', $parsed_file_path['file_path'] ), '/' );
			$xsendfile_path = apply_filters( 'woocommerce_download_file_xsendfile_x_accel_redirect_file_path', $xsendfile_path, $file_path, $filename, $parsed_file_path );
			header( "X-Accel-Redirect: /$xsendfile_path" );
			exit;
		}

		// Fallback.
		self::download_file_force( $file_path, $filename );
	}