150 lines
6.4 KiB
PHP
Executable File
150 lines
6.4 KiB
PHP
Executable File
<?php
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/**
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* download header_php.php
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*
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* @package page
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* @copyright Copyright 2003-2006 Zen Cart Development Team
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* @copyright Portions Copyright 2003 osCommerce
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* @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
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* @version $Id: header_php.php 2973 2006-02-04 23:27:35Z wilt $
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*/
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// This should be first line of the script:
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$zco_notifier->notify('NOTIFY_HEADER_START_DOWNLOAD');
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require(DIR_WS_MODULES . zen_get_module_directory('require_languages.php'));
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// if the customer is not logged on, redirect them to the time out page
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if (!$_SESSION['customer_id']) {
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zen_redirect(zen_href_link(FILENAME_TIME_OUT));
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}
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// Check download.php was called with proper GET parameters
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if ((isset($_GET['order']) && !is_numeric($_GET['order'])) || (isset($_GET['id']) && !is_numeric($_GET['id'])) ) {
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// if the paramaters are wrong, redirect them to the time out page
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zen_redirect(zen_href_link(FILENAME_TIME_OUT));
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}
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// Check that order_id, customer_id and filename match
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$sql = "SELECT date_format(o.date_purchased, '%Y-%m-%d')
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AS date_purchased_day, opd.download_maxdays, opd.download_count, opd.download_maxdays, opd.orders_products_filename
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FROM " . TABLE_ORDERS . " o, " . TABLE_ORDERS_PRODUCTS . " op, " . TABLE_ORDERS_PRODUCTS_DOWNLOAD . " opd
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WHERE o.customers_id = customersID
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AND o.orders_id = ordersID
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AND o.orders_id = op.orders_id
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AND op.orders_products_id = opd.orders_products_id
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AND opd.orders_products_download_id = downloadID
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AND opd.orders_products_filename != ''";
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$sql = $db->bindVars($sql, 'customersID', $_SESSION['customer_id'], 'integer');
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$sql = $db->bindVars($sql, 'downloadID', $_GET['id'], 'integer');
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$sql = $db->bindVars($sql, 'ordersID', $_GET['order'], 'integer');
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$downloads = $db->Execute($sql);
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if ($downloads->RecordCount() <= 0 ) die;
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// MySQL 3.22 does not have INTERVAL
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list($dt_year, $dt_month, $dt_day) = explode('-', $downloads->fields['date_purchased_day']);
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$download_timestamp = mktime(23, 59, 59, $dt_month, $dt_day + $downloads->fields['download_maxdays'], $dt_year);
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// Die if time expired (maxdays = 0 means no time limit)
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if (($downloads->fields['download_maxdays'] != 0) && ($download_timestamp <= time())) {
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zen_redirect(zen_href_link(FILENAME_DOWNLOAD_TIME_OUT));
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}
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// Die if remaining count is <=0 (maxdays = 0 means no time limit)
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if ($downloads->fields['download_count'] <= 0 and $downloads->fields['download_maxdays'] != 0) {
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zen_redirect(zen_href_link(FILENAME_DOWNLOAD_TIME_OUT));
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}
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// FIX HERE AND GIVE ERROR PAGE FOR MISSING FILE
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// Die if file is not there
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if (!file_exists(DIR_FS_DOWNLOAD . $downloads->fields['orders_products_filename'])) die('Sorry. File not found. Please contact the webmaster to report this error.<br />c/f: ' . $downloads->fields['orders_products_filename']);
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// Now decrement counter
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$sql = "UPDATE " . TABLE_ORDERS_PRODUCTS_DOWNLOAD . "
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SET download_count = download_count-1
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WHERE orders_products_download_id = downloadID";
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$sql = $db->bindVars($sql, 'downloadID', $_GET['id'], 'integer');
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$db->Execute($sql);
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// Returns a random name, 16 to 20 characters long
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// There are more than 10^28 combinations
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// The directory is "hidden", i.e. starts with '.'
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function zen_random_name()
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{
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$letters = 'abcdefghijklmnopqrstuvwxyz';
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$dirname = '.';
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$length = floor(zen_rand(16,20));
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for ($i = 1; $i <= $length; $i++) {
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$q = floor(zen_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 $dir
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// Works only on one subdir level, will not recurse
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function zen_unlink_temp_dir($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=" . $downloads->fields['orders_products_filename']);
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$zv_filesize = filesize(DIR_FS_DOWNLOAD . $downloads->fields['orders_products_filename']);
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if (DOWNLOAD_BY_REDIRECT == 'true') {
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// This will work only on Unix/Linux hosts
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zen_unlink_temp_dir(DIR_FS_DOWNLOAD_PUBLIC);
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$tempdir = zen_random_name();
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umask(0000);
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mkdir(DIR_FS_DOWNLOAD_PUBLIC . $tempdir, 0777);
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$download_link = str_replace(array('/','\\'),'_',$downloads->fields['orders_products_filename']);
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$link_create_status = symlink(DIR_FS_DOWNLOAD . $downloads->fields['orders_products_filename'], DIR_FS_DOWNLOAD_PUBLIC . $tempdir . '/' . $download_link);
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$zco_notifier->notify('NOTIFY_DOWNLOAD_VIA_SYMLINK___BEGINS');
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if ($link_create_status==true) zen_redirect(DIR_WS_DOWNLOAD_PUBLIC . $tempdir . '/' . $download_link);
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}
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if (DOWNLOAD_BY_REDIRECT != 'true' or $link_create_status==false ) {
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// not downloading by redirect; instead, we stream it to the browser. This happens if the symlink couldn't happen, or if set as default in Admin
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if (DOWNLOAD_IN_CHUNKS != 'true') {
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// This will work on all systems, but will need considerable resources
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header("Content-Length: " . $zv_filesize);
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$zco_notifier->notify('NOTIFY_DOWNLOAD_WITHOUT_REDIRECT___COMPLETED');
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readfile(DIR_FS_DOWNLOAD . $downloads->fields['orders_products_filename']);
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} else {
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// loop with fread($fp, xxxx) to allow streaming in chunk sizes below the PHP memory_limit
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header("Content-Length: " . $zv_filesize);
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$handle = fopen(DIR_FS_DOWNLOAD . $downloads->fields['orders_products_filename'], "rb");
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while (!feof($handle)) {
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echo(fread($handle, 4096));
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flush();
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}
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fclose($handle);
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$zco_notifier->notify('NOTIFY_DOWNLOAD_WITHOUT_REDIRECT_VIA_CHUNKS___COMPLETED');
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}
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}
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// This should be last line of the script:
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$zco_notifier->notify('NOTIFY_HEADER_END_DOWNLOAD');
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?>
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