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