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File: system/helpers/download_helper.php

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  Classes of Asad Ullah  >  PHP Google Authenticator with CodeIgniter  >  system/helpers/download_helper.php  >  Download  
File: system/helpers/download_helper.php
Role: Auxiliary script
Content type: text/plain
Description: Auxiliary script
Class: PHP Google Authenticator with CodeIgniter
2fa Google Authenticator implementation
Author: By
Last change:
Date: 1 year ago
Size: 4,577 bytes
 

 

Contents

Class file image Download
<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2018, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package CodeIgniter
 * @author EllisLab Dev Team
 * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright Copyright (c) 2014 - 2018, British Columbia Institute of Technology (http://bcit.ca/)
 * @license http://opensource.org/licenses/MIT MIT License
 * @link https://codeigniter.com
 * @since Version 1.0.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * CodeIgniter Download Helpers
 *
 * @package CodeIgniter
 * @subpackage Helpers
 * @category Helpers
 * @author EllisLab Dev Team
 * @link 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 (
$data === NULL)
        {
            if ( ! @
is_file($filename) OR ($filesize = @filesize($filename)) === FALSE)
            {
                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 (
$set_mime === TRUE)
        {
            if (
count($x) === 1 OR $extension === '')
            {
               
/* If we're going to detect the MIME type,
                 * we'll need a file extension.
                 */
               
return;
            }

           
// 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);
        }

        if (
$data === NULL && ($fp = @fopen($filepath, 'rb')) === FALSE)
        {
            return;
        }

       
// Clean output buffer
       
if (ob_get_level() !== 0 && @ob_end_clean() === FALSE)
        {
            @
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 ($data !== NULL)
        {
            exit(
$data);
        }

       
// Flush 1MB chunks of data
       
while ( ! feof($fp) && ($data = fread($fp, 1048576)) !== FALSE)
        {
            echo
$data;
        }

       
fclose($fp);
        exit;
    }
}