For clarity’s sake, in case a less experienced person wants to make the change himself:
/**
* Sends headers to redirect to dc_download.php when download code was entered successfully.
*/
function dc_headers() {
global $wpdb;
if (isset( $_GET['lease'] )) {
// Set timeout
set_time_limit( 1200 );
// Get details for code and release
$release = $wpdb->get_row( "SELECT r.*, c.ID as code, c.code_prefix, c.code_suffix FROM " . dc_tbl_releases() . " r INNER JOIN " . dc_tbl_codes() ." c ON c.release = r.ID WHERE MD5(CONCAT('wp-dl-hash',c.ID)) = '" . $_GET['lease'] . "'" );
// Get # of downloads with this code
$downloads = $wpdb->get_row( "SELECT COUNT(*) AS downloads FROM " . dc_tbl_downloads() . " WHERE code= " . $release->code );
// Start download if maximum of allowed downloads is not reached
if ($downloads->downloads < $release->allowed_downloads) {
// Get current IP
$IP = $_SERVER['REMOTE_ADDR'];
// Insert download in downloads table
$wpdb->insert( dc_tbl_downloads(),
array( 'code' => $release->code, 'IP' => $IP),
array( '%d', '%s') );
// Send headers for download
header("Pragma: public");
header("Expires: 0");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Content-Description: File Transfer");
header("Content-Type: application/force-download");
header("Content-Type: application/octet-stream");
header("Content-Type: application/download");
header("Content-Disposition: attachment; filename=\"" . $release->filename . "\"");
header("Content-Transfer-Encoding: binary");
header("Content-Length: ".filesize( dc_file_location() . $release->filename ));
flush();
ob_end_flush();
// Stream file
$handle = fopen( dc_file_location() . $release->filename, 'rb' );
$chunksize = 1*(1024*1024);
$buffer = '';
if ($handle === false) {
exit;
}
while (!feof($handle)) {
$buffer = fread($handle, $chunksize);
echo $buffer;
flush();
}
// Close file
fclose($handle);
}
}
