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<?php
/*
* 2007-2016 PrestaShop
*
* NOTICE OF LICENSE
*
* This source file is subject to the Open Software License (OSL 3.0)
* that is bundled with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://opensource.org/licenses/osl-3.0.php
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@prestashop.com so we can send you a copy immediately.
*
* DISCLAIMER
*
* Do not edit or add to this file if you wish to upgrade PrestaShop to newer
* versions in the future. If you wish to customize PrestaShop for your
* needs please refer to http://www.prestashop.com for more information.
*
*  @author PrestaShop SA <contact@prestashop.com>
*  @copyright  2007-2016 PrestaShop SA
*  @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
*  International Registered Trademark & Property of PrestaShop SA
*/

if (!defined('_PS_ADMIN_DIR_')) {
    define('_PS_ADMIN_DIR_', getcwd());
}
include(_PS_ADMIN_DIR_.'/../config/config.inc.php');

if (!Context::getContext()->employee->isLoggedBack()) {
    Tools::redirectAdmin(Context::getContext()->link->getAdminLink('AdminLogin'));
}

$tabAccess = Profile::getProfileAccess(Context::getContext()->employee->id_profile,
    Tab::getIdFromClassName('AdminBackup'));

if ($tabAccess['view'] !== '1') {
    die(Tools::displayError('You do not have permission to view this.'));
}

$backupdir = realpath(PrestaShopBackup::getBackupPath());

if ($backupdir === false) {
    die(Tools::displayError('There is no "/backup" directory.'));
}

if (!$backupfile = Tools::getValue('filename')) {
    die(Tools::displayError('No file has been specified.'));
}

// Check the realpath so we can validate the backup file is under the backup directory
$backupfile = realpath($backupdir.DIRECTORY_SEPARATOR.$backupfile);

if ($backupfile === false or strncmp($backupdir, $backupfile, strlen($backupdir)) != 0) {
    die(Tools::dieOrLog('The backup file does not exist.'));
}

if (substr($backupfile, -4) == '.bz2') {
    $contentType = 'application/x-bzip2';
} elseif (substr($backupfile, -3) == '.gz') {
    $contentType = 'application/x-gzip';
} else {
    $contentType = 'text/x-sql';
}
$fp = @fopen($backupfile, 'r');

if ($fp === false) {
    die(Tools::displayError('Unable to open backup file(s).').' "'.addslashes($backupfile).'"');
}

// Add the correct headers, this forces the file is saved
header('Content-Type: '.$contentType);
header('Content-Disposition: attachment; filename="'.Tools::getValue('filename'). '"');

if (ob_get_level() && ob_get_length() > 0) {
    ob_clean();
}
$ret = @fpassthru($fp);

fclose($fp);

if ($ret === false) {
    die(Tools::displayError('Unable to display backup file(s).').' "'.addslashes($backupfile).'"');
}