PHP Classes

File: aksara/Helpers/download_helper.php

Recommend this page to a friend!
  Classes of Aby Dahana   Aksara   aksara/Helpers/download_helper.php   Download  
File: aksara/Helpers/download_helper.php
Role: Auxiliary script
Content type: text/plain
Description: Auxiliary script
Class: Aksara
A CodeIgniter based API and CRUD generator
Author: By
Last change: Initial commit for update 5.0.0
Date: 4 months ago
Size: 4,322 bytes
 

Contents

Class file image Download
<?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;
    }
}