<?php
/*
 * Copyright (C) 2009  Nick White
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

function return_tarball($name, $contents)
{
	require("Archive/Tar.php");

	$mimetype = "application/x-tar";
	$extension = "tar.bz2";

	$timestamp = strftime('%F');

	/* Use output buffering (ob_start and ob_end_flush) to ensure that the
	 * tarball data sent to stdout doesn't interfere with the headers. */
	ob_start();
	header('Content-Type: ' . $mimetype);
	header('Content-Disposition: attachment; filename="' . $name . '-' . $timestamp . '.' . $extension . '"');
	header('Expires: 0');
	header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
	header('Pragma: public');
	ob_end_flush();

	ob_start();
	$tarball = new Archive_Tar("php://stdout", "bz2");

	$tarball->create($contents);
	ob_end_flush();
}