diff options
Diffstat (limited to 'system/helpers/download_helper.php')
| -rw-r--r-- | system/helpers/download_helper.php | 89 |
1 files changed, 53 insertions, 36 deletions
diff --git a/system/helpers/download_helper.php b/system/helpers/download_helper.php index aea948d81..8b87f8179 100644 --- a/system/helpers/download_helper.php +++ b/system/helpers/download_helper.php @@ -1,13 +1,13 @@ -<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); +<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); /** * CodeIgniter * - * An open source application development framework for PHP 5.1.6 or newer + * 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: @@ -25,8 +25,6 @@ * @filesource */ -// ------------------------------------------------------------------------ - /** * CodeIgniter Download Helpers * @@ -44,70 +42,89 @@ * * Generates headers that force a download to happen * - * @access public * @param string filename * @param mixed the data to be downloaded + * @param bool wether to try and send the actual file MIME type * @return void */ if ( ! function_exists('force_download')) { - function force_download($filename = '', $data = '') + function force_download($filename = '', $data = '', $set_mime = FALSE) { if ($filename == '' OR $data == '') { return FALSE; } - // Try to determine if the filename includes a file extension. - // We need it in order to set the MIME type - if (FALSE === strpos($filename, '.')) - { - return FALSE; - } + // Set the default MIME type to send + $mime = 'application/octet-stream'; - // Grab the file extension $x = explode('.', $filename); $extension = end($x); - // Load the mime types - if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes.php')) + if ($set_mime === TRUE) { - include(APPPATH.'config/'.ENVIRONMENT.'/mimes.php'); - } - elseif (is_file(APPPATH.'config/mimes.php')) - { - include(APPPATH.'config/mimes.php'); - } + if (count($x) === 1 OR $extension === '') + { + /* If we're going to detect the MIME type, + * we'll need a file extension. + */ + return FALSE; + } - // Set a default mime if we can't find it - if ( ! isset($mimes[$extension])) - { - $mime = 'application/octet-stream'; + // Load the mime types + if (defined('ENVIRONMENT') && is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes.php')) + { + include(APPPATH.'config/'.ENVIRONMENT.'/mimes.php'); + } + elseif (is_file(APPPATH.'config/mimes.php')) + { + include(APPPATH.'config/mimes.php'); + } + + // Only change the default MIME if we can find one + if (isset($mimes[$extension])) + { + $mime = is_array($mimes[$extension]) ? $mimes[$extension][0] : $mimes[$extension]; + } } - else + + /* 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'])) { - $mime = (is_array($mimes[$extension])) ? $mimes[$extension][0] : $mimes[$extension]; + $x[count($x) - 1] = strtoupper($extension); + $filename = implode('.', $x); } + // Clean output buffer + ob_clean(); + // Generate the server headers - header('Content-Type: "'.$mime.'"'); + header('Content-Type: '.$mime); header('Content-Disposition: attachment; filename="'.$filename.'"'); header('Expires: 0'); - header("Content-Transfer-Encoding: binary"); - header("Content-Length: ".strlen($data)); - header('Pragma: no-cache'); + header('Content-Transfer-Encoding: binary'); + header('Content-Length: '.strlen($data)); - // Internet Explorer-specific headers. - if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], "MSIE") !== FALSE) + // Internet Explorer-specific headers + if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE) { header('Cache-Control: must-revalidate, post-check=0, pre-check=0'); header('Pragma: public'); } + else + { + header('Pragma: no-cache'); + } exit($data); } } - /* End of file download_helper.php */ /* Location: ./system/helpers/download_helper.php */
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