<?php
/**
* This file is part of Aksara CMS, both framework and publishing
* platform.
*
* @author Aby Dahana <abydahana@gmail.com>
* @copyright (c) Aksara Laboratory <https://aksaracms.com>
* @license MIT License
*
* This source file is subject to the MIT license that is bundled
* with this source code in the LICENSE.txt file.
*
* When the signs is coming, those who don't believe at "that time"
* have only two choices, commit suicide or become brutal.
*/
/**
* CodeIgniter Download Helpers
*
* @category Helpers
* @author EllisLab Dev Team
* @see https://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;
} elseif (null === $data) {
if (! @is_file($filename) or false === ($filesize = @filesize($filename))) {
return;
}
$filepath = $filename;
$filename = explode('/', str_replace(DIRECTORY_SEPARATOR, '/', $filename));
$filename = end($filename);
} else {
$filesize = strlen($data);
}
// Set the default MIME type to send
$mime = 'application/octet-stream';
$x = explode('.', $filename);
$extension = end($x);
if (true === $set_mime) {
if (count($x) === 1 or '' === $extension) {
/* If we're going to detect the MIME type,
* we'll need a file extension.
*/
return;
} elseif ('css' == $extension) {
$mime = 'text/css';
} elseif ('js' == $extension) {
$mime = 'application/javascript';
} elseif ('png' == $extension) {
$mime = 'image/png';
} elseif ('jpg' == $extension || 'jpeg' == $extension) {
$mime = 'image/jpeg';
} elseif ('gif' == $extension) {
$mime = 'image/gif';
} elseif ('svg' == $extension) {
$mime = 'image/svg+xml';
} elseif ('bmp' == $extension) {
$mime = 'image/bmp';
} elseif ('webp' == $extension) {
$mime = 'image/webp';
}
}
/* It was reported that browsers on Android 2.1 (and possibly older as well)
* need to have the filename extension upper-cased in order to be able to
* download it.
*
* Reference: http://digiblog.de/2011/04/19/android-and-the-download-file-headers/
*/
if (count($x) !== 1 && preg_match('/Android\s(1|2\.[01])/', service('request')->getServer('HTTP_USER_AGENT'))) {
$x[count($x) - 1] = strtoupper($extension);
$filename = implode('.', $x);
}
if (null === $data && false === ($fp = @fopen($filepath, 'rb'))) {
return;
}
// Clean output buffer
if (ob_get_level() !== 0 && false === @ob_end_clean()) {
@ob_clean();
}
// Generate the server headers
header('Content-Type: '.$mime);
header('Content-Disposition: attachment; filename="'.$filename.'"');
header('Expires: 0');
header('Content-Transfer-Encoding: binary');
header('Content-Length: '.$filesize);
header('Cache-Control: private, no-transform, no-store, must-revalidate');
// If we have raw data - just dump it
if (null !== $data) {
exit($data);
}
// Flush 1MB chunks of data
while (! feof($fp) && false !== ($data = fread($fp, 1048576))) {
echo $data;
}
fclose($fp);
exit;
}
}
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