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- <?php
- /*
- $Id: download.php,v 1.9 2003/02/13 03:01:48 hpdl Exp $
-
- osCommerce, Open Source E-Commerce Solutions
- http://www.oscommerce.com
-
- Copyright (c) 2003 osCommerce
-
- Released under the GNU General Public License
- */
-
- include('includes/application_top.php');
-
- if (!tep_session_is_registered('customer_id')) die;
-
- // Check download.php was called with proper GET parameters
- if ((isset($HTTP_GET_VARS['order']) && !is_numeric($HTTP_GET_VARS['order'])) || (isset($HTTP_GET_VARS['id']) && !is_numeric($HTTP_GET_VARS['id'])) ) {
- die;
- }
-
- // Check that order_id, customer_id and filename match
- $downloads_query = tep_db_query("select date_format(o.date_purchased, '%Y-%m-%d') as date_purchased_day, opd.download_maxdays, opd.download_count, opd.download_maxdays, opd.orders_products_filename from " . TABLE_ORDERS . " o, " . TABLE_ORDERS_PRODUCTS . " op, " . TABLE_ORDERS_PRODUCTS_DOWNLOAD . " opd where o.customers_id = '" . $customer_id . "' and o.orders_id = '" . (int)$HTTP_GET_VARS['order'] . "' and o.orders_id = op.orders_id and op.orders_products_id = opd.orders_products_id and opd.orders_products_download_id = '" . (int)$HTTP_GET_VARS['id'] . "' and opd.orders_products_filename != ''");
- if (!tep_db_num_rows($downloads_query)) die;
- $downloads = tep_db_fetch_array($downloads_query);
- // MySQL 3.22 does not have INTERVAL
- list($dt_year, $dt_month, $dt_day) = explode('-', $downloads['date_purchased_day']);
- $download_timestamp = mktime(23, 59, 59, $dt_month, $dt_day + $downloads['download_maxdays'], $dt_year);
-
- // Die if time expired (maxdays = 0 means no time limit)
- if (($downloads['download_maxdays'] != 0) && ($download_timestamp <= time())) die;
- // Die if remaining count is <=0
- if ($downloads['download_count'] <= 0) die;
- // Die if file is not there
- if (!file_exists(DIR_FS_DOWNLOAD . $downloads['orders_products_filename'])) die;
-
- // Now decrement counter
- tep_db_query("update " . TABLE_ORDERS_PRODUCTS_DOWNLOAD . " set download_count = download_count-1 where orders_products_download_id = '" . (int)$HTTP_GET_VARS['id'] . "'");
-
- // Returns a random name, 16 to 20 characters long
- // There are more than 10^28 combinations
- // The directory is "hidden", i.e. starts with '.'
- function tep_random_name()
- {
- $letters = 'abcdefghijklmnopqrstuvwxyz';
- $dirname = '.';
- $length = floor(tep_rand(16,20));
- for ($i = 1; $i <= $length; $i++) {
- $q = floor(tep_rand(1,26));
- $dirname .= $letters[$q];
- }
- return $dirname;
- }
-
- // Unlinks all subdirectories and files in $dir
- // Works only on one subdir level, will not recurse
- function tep_unlink_temp_dir($dir)
- {
- $h1 = opendir($dir);
- while ($subdir = readdir($h1)) {
- // Ignore non directories
- if (!is_dir($dir . $subdir)) continue;
- // Ignore . and .. and CVS
- if ($subdir == '.' || $subdir == '..' || $subdir == 'CVS') continue;
- // Loop and unlink files in subdirectory
- $h2 = opendir($dir . $subdir);
- while ($file = readdir($h2)) {
- if ($file == '.' || $file == '..') continue;
- @unlink($dir . $subdir . '/' . $file);
- }
- closedir($h2);
- @rmdir($dir . $subdir);
- }
- closedir($h1);
- }
-
-
- // Now send the file with header() magic
- header("Expires: Mon, 26 Nov 1962 00:00:00 GMT");
- header("Last-Modified: " . gmdate("D,d M Y H:i:s") . " GMT");
- header("Cache-Control: no-cache, must-revalidate");
- header("Pragma: no-cache");
- header("Content-Type: Application/octet-stream");
- header("Content-disposition: attachment; filename=" . $downloads['orders_products_filename']);
-
- if (DOWNLOAD_BY_REDIRECT == 'true') {
- // This will work only on Unix/Linux hosts
- tep_unlink_temp_dir(DIR_FS_DOWNLOAD_PUBLIC);
- $tempdir = tep_random_name();
- umask(0000);
- mkdir(DIR_FS_DOWNLOAD_PUBLIC . $tempdir, 0777);
- symlink(DIR_FS_DOWNLOAD . $downloads['orders_products_filename'], DIR_FS_DOWNLOAD_PUBLIC . $tempdir . '/' . $downloads['orders_products_filename']);
- tep_redirect(DIR_WS_DOWNLOAD_PUBLIC . $tempdir . '/' . $downloads['orders_products_filename']);
- } else {
- // This will work on all systems, but will need considerable resources
- // We could also loop with fread($fp, 4096) to save memory
- readfile(DIR_FS_DOWNLOAD . $downloads['orders_products_filename']);
- }
- ?>
-