1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014 - 2015, 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. (http://ellislab.com/)
* @copyright Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
* @license http://opensource.org/licenses/MIT MIT License
* @link http://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 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 $data === '')
{
return FALSE;
}
elseif ($data === NULL)
{
if (@is_file($filename) && ($filesize = @filesize($filename)) !== FALSE)
{
$filepath = $filename;
$filename = explode('/', str_replace(DIRECTORY_SEPARATOR, '/', $filename));
$filename = end($filename);
}
else
{
return FALSE;
}
}
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 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('.', $x);
}
if ($data === NULL && ($fp = @fopen($filepath, 'rb')) === FALSE)
{
return FALSE;
}
// 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: '.$filesize);
// Internet Explorer-specific headers
if (isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') !== FALSE)
{
header('Cache-Control: no-cache, no-store, must-revalidate');
}
header('Pragma: no-cache');
// If we have raw data - just dump it
if ($data !== NULL)
{
exit($data);
}
// Flush 1MB chunks of data
while ( ! feof($fp) && ($data = fread($fp, 1048576)) !== FALSE)
{
echo $data;
}
fclose($fp);
exit;
}
}
/* End of file download_helper.php */
/* Location: ./system/helpers/download_helper.php */
|
