<?php /** * CodeIgniter * * An open source application development framework for PHP 5.2.4 or newer * * NOTICE OF LICENSE * * Licensed under the Open Software License version 3.0 * * This source file is subject to the Open Software License (OSL 3.0) that is * bundled with this package in the files license.txt / license.rst. It is * also available through the world wide web at this URL: * http://opensource.org/licenses/OSL-3.0 * 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 * licensing@ellislab.com so we can send you a copy immediately. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/) * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0) * @link http://codeigniter.com * @since Version 1.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * CodeIgniter Download Helpers * * @package CodeIgniter * @subpackage Helpers * @category Helpers * @author EllisLab Dev Team * @link http://codeigniter.com/user_guide/helpers/download_helper.html */ // ------------------------------------------------------------------------ if ( ! function_exists('force_download')) { /** * Force Download * * Generates headers that force a download to happen * * @param string filename * @param mixed the data to be downloaded * @param bool whether to try and send the actual file MIME type * @return void */ function force_download($filename = '', $data = '', $set_mime = FALSE) { if ($filename === '' OR $data === '') { return FALSE; } // Set the default MIME type to send $mime = 'application/octet-stream'; $x = explode('.', $filename); $extension = end($x); if ($set_mime === TRUE) { if (count($x) === 1 OR $extension === '') { /* If we're going to detect the MIME type, * we'll need a file extension. */ return FALSE; } // Load the mime types $mimes =& get_mimes(); // Only change the default MIME if we can find one if (isset($mimes[$extension])) { $mime = is_array($mimes[$extension]) ? $mimes[$extension][0] : $mimes[$extension]; } } /* It was reported that browsers on Android 2.1 (and possibly older as well) * need to have the filename extension upper-cased in order to be able to * download it. * * Reference: http://digiblog.de/2011/04/19/android-and-the-download-file-headers/ */ if (count($x) !== 1 && isset($_SERVER['HTTP_USER_AGENT']) && preg_match('/Android\s(1|2\.[01])/', $_SERVER['HTTP_USER_AGENT'])) { $x[count($x) - 1] = strtoupper($extension); $filename = implode('.', $x); } // Clean output buffer if (ob_get_level() !== 0) { ob_clean(); } // Generate the server headers header('Content-Type: '.$mime); header('Content-Disposition: attachment; filename="'.$filename.'"'); header('Expires: 0'); header('Content-Transfer-Encoding: binary'); header('Content-Length: '.strlen($data)); // Internet Explorer-specific headers if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) { header('Cache-Control: no-cache, no-store, must-revalidate'); } header('Pragma: no-cache'); exit($data); } } /* End of file download_helper.php */ /* Location: ./system/helpers/download_helper.php */