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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
<?php
/**
* DokuWiki media passthrough file
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Andreas Gohr <andi@splitbrain.org>
*/
if(!defined('DOKU_INC')) define('DOKU_INC',dirname(__FILE__).'/../../');
define('DOKU_DISABLE_GZIP_OUTPUT', 1);
require_once(DOKU_INC.'inc/init.php');
require_once(DOKU_INC.'inc/common.php');
require_once(DOKU_INC.'inc/media.php');
require_once(DOKU_INC.'inc/pageutils.php');
require_once(DOKU_INC.'inc/confutils.php');
require_once(DOKU_INC.'inc/auth.php');
//close sesseion
session_write_close();
if(!defined('CHUNK_SIZE')) define('CHUNK_SIZE',16*1024);
$mimetypes = getMimeTypes();
//get input
$MEDIA = stripctl(getID('media',false)); // no cleaning except control chars - maybe external
$CACHE = calc_cache($_REQUEST['cache']);
$WIDTH = (int) $_REQUEST['w'];
$HEIGHT = (int) $_REQUEST['h'];
list($EXT,$MIME,$DL) = mimetype($MEDIA);
if($EXT === false){
$EXT = 'unknown';
$MIME = 'application/octet-stream';
$DL = true;
}
//media to local file
if(preg_match('#^(https?)://#i',$MEDIA)){
//handle external images
if(strncmp($MIME,'image/',6) == 0) $FILE = media_get_from_URL($MEDIA,$EXT,$CACHE);
if(!$FILE){
//download failed - redirect to original URL
header('Location: '.$MEDIA);
exit;
}
}else{
$MEDIA = cleanID($MEDIA);
if(empty($MEDIA)){
header("HTTP/1.0 400 Bad Request");
print 'Bad request';
exit;
}
//check permissions (namespace only)
if(auth_quickaclcheck(getNS($MEDIA).':X') < AUTH_READ){
header("HTTP/1.0 401 Unauthorized");
//fixme add some image for imagefiles
print 'Unauthorized';
exit;
}
$FILE = mediaFN($MEDIA);
}
//check file existance
if(!@file_exists($FILE)){
header("HTTP/1.0 404 Not Found");
//FIXME add some default broken image
print 'Not Found';
exit;
}
$ORIG = $FILE;
//handle image resizing/cropping
if((substr($MIME,0,5) == 'image') && $WIDTH){
if($HEIGHT){
$FILE = media_crop_image($FILE,$EXT,$WIDTH,$HEIGHT);
}else{
$FILE = media_resize_image($FILE,$EXT,$WIDTH,$HEIGHT);
}
}
// finally send the file to the client
$data = array('file' => $FILE,
'mime' => $MIME,
'download' => $DL,
'cache' => $CACHE,
'orig' => $ORIG,
'ext' => $EXT,
'width' => $WIDTH,
'height' => $HEIGHT);
$evt = new Doku_Event('MEDIA_SENDFILE', $data);
if ($evt->advise_before()) {
sendFile($data['file'],$data['mime'],$data['download'],$data['cache']);
}
/* ------------------------------------------------------------------------ */
/**
* Set headers and send the file to the client
*
* @author Andreas Gohr <andi@splitbrain.org>
* @author Ben Coburn <btcoburn@silicodon.net>
*/
function sendFile($file,$mime,$dl,$cache){
global $conf;
$fmtime = @filemtime($file);
// send headers
header("Content-Type: $mime");
// smart http caching headers
if ($cache==-1) {
// cache
// cachetime or one hour
header('Expires: '.gmdate("D, d M Y H:i:s", time()+max($conf['cachetime'], 3600)).' GMT');
header('Cache-Control: public, proxy-revalidate, no-transform, max-age='.max($conf['cachetime'], 3600));
header('Pragma: public');
} else if ($cache>0) {
// recache
// remaining cachetime + 10 seconds so the newly recached media is used
header('Expires: '.gmdate("D, d M Y H:i:s", $fmtime+$conf['cachetime']+10).' GMT');
header('Cache-Control: public, proxy-revalidate, no-transform, max-age='.max($fmtime-time()+$conf['cachetime']+10, 0));
header('Pragma: public');
} else if ($cache==0) {
// nocache
header('Cache-Control: must-revalidate, no-transform, post-check=0, pre-check=0');
header('Pragma: public');
}
//send important headers first, script stops here if '304 Not Modified' response
http_conditionalRequest($fmtime);
//download or display?
if($dl){
header('Content-Disposition: attachment; filename="'.basename($file).'";');
}else{
header('Content-Disposition: inline; filename="'.basename($file).'";');
}
//use x-sendfile header to pass the delivery to compatible webservers
if (http_sendfile($file)) exit;
//support download continueing
header('Accept-Ranges: bytes');
list($start,$len) = http_rangeRequest(filesize($file));
// send file contents
$fp = @fopen($file,"rb");
if($fp){
fseek($fp,$start); //seek to start of range
$chunk = ($len > CHUNK_SIZE) ? CHUNK_SIZE : $len;
while (!feof($fp) && $chunk > 0) {
@set_time_limit(30); // large files can take a lot of time
print fread($fp, $chunk);
flush();
$len -= $chunk;
$chunk = ($len > CHUNK_SIZE) ? CHUNK_SIZE : $len;
}
fclose($fp);
}else{
header("HTTP/1.0 500 Internal Server Error");
print "Could not read $file - bad permissions?";
}
}
/**
* Checks and sets headers to handle range requets
*
* @author Andreas Gohr <andi@splitbrain.org>
* @returns array The start byte and the amount of bytes to send
*/
function http_rangeRequest($size){
if(!isset($_SERVER['HTTP_RANGE'])){
// no range requested - send the whole file
header("Content-Length: $size");
return array(0,$size);
}
$t = explode('=', $_SERVER['HTTP_RANGE']);
if (!$t[0]=='bytes') {
// we only understand byte ranges - send the whole file
header("Content-Length: $size");
return array(0,$size);
}
$r = explode('-', $t[1]);
$start = (int)$r[0];
$end = (int)$r[1];
if (!$end) $end = $size - 1;
if ($start > $end || $start > $size || $end > $size){
header('HTTP/1.1 416 Requested Range Not Satisfiable');
print 'Bad Range Request!';
exit;
}
$tot = $end - $start + 1;
header('HTTP/1.1 206 Partial Content');
header("Content-Range: bytes {$start}-{$end}/{$size}");
header("Content-Length: $tot");
return array($start,$tot);
}
/**
* Returns the wanted cachetime in seconds
*
* Resolves named constants
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function calc_cache($cache){
global $conf;
if(strtolower($cache) == 'nocache') return 0; //never cache
if(strtolower($cache) == 'recache') return $conf['cachetime']; //use standard cache
return -1; //cache endless
}
//Setup VIM: ex: et ts=2 enc=utf-8 :
?>
|
