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
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
<?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',realpath(dirname(__FILE__).'/../../').'/');
require_once(DOKU_INC.'inc/init.php');
require_once(DOKU_INC.'inc/common.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();
$mimetypes = getMimeTypes();
//get input
$MEDIA = getID('media');
$CACHE = calc_cache($_REQUEST['cache']);
$WIDTH = $_REQUEST['w'];
$HEIGHT = $_REQUEST['h'];
list($EXT,$MIME) = mimetype($MEDIA);
if($EXT === false){
$EXT = 'unknown';
$MIME = 'application/octet-stream';
}
//media to local file
if(preg_match('#^(https?|ftp)://#i',$MEDIA)){
//handle external media
$FILE = get_from_URL($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($FILE)){
header("HTTP/1.0 404 Not Found");
//FIXME add some default broken image
print 'Not Found';
exit;
}
//handle image resizing
if((substr($MIME,0,5) == 'image') && $WIDTH){
$FILE = get_resized($FILE,$EXT,$WIDTH,$HEIGHT);
}
//FIXME set sane cachecontrol headers
//FIXME handle conditional and partial requests
//send file
header("Content-Type: $MIME");
header('Last-Modified: '.date('r',filemtime($FILE)));
header('Content-Length: '.filesize($FILE));
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
//application mime type is downloadable
if(substr($MIME,0,11) == 'application'){
header('Content-Disposition: attachment; filename="'.basename($FILE).'"');
}
$fp = @fopen($FILE,"rb");
if($fp){
while (!feof($fp)) {
@set_time_limit(); // large files can take a lot of time
print fread($fp, 16*1024);
flush();
}
fclose($fp);
}else{
header("HTTP/1.0 500 Internal Server Error");
print "Could not read $FILE - bad permissions?";
}
/* ------------------------------------------------------------------------ */
/**
* Resizes the given image to the given size
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function get_resized($file, $ext, $w, $h=0){
global $conf;
$info = getimagesize($file);
if(!$h) $h = round(($w * $info[1]) / $info[0]);
//cache
$local = getCacheName($file,'.media.'.$w.'x'.$h.'.'.$ext);
$mtime = @filemtime($local); // 0 if not exists
if( $mtime > filemtime($file) || resize_image($ext,$file,$info[0],$info[1],$local,$w,$h) ){
return $local;
}
//still here? resizing failed
return $file;
}
/**
* Returns the wanted cachetime in seconds
*
* Resolves named constants
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function calc_cache($cache){
global $conf;
if(strtolower($cache) == 'nocache') return 0; //never cache
if(strtolower($cache) == 'recache') return $conf['cachetime']; //use standard cache
return -1; //cache endless
}
/**
* Download a remote file and return local filename
*
* returns false if download fails. Uses cached file if available and
* wanted
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function get_from_URL($url,$ext,$cache){
global $conf;
$url = strtolower($url);
$local = getCacheName($url,".media.$ext");
$mtime = @filemtime($local); // 0 if not exists
//decide if download needed:
// never cache exists but no endless cache not exists or expired
if( $cache == 0 || ($mtime != 0 && $cache != -1) || $mtime < time()-$cache ){
if(io_download($url,$local)){
return $local;
}else{
return false;
}
}
//if cache exists use it else
if($mtime) return $local;
//else return false
return false;
}
/**
* resize images
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function resize_image($ext,$from,$from_w,$from_h,$to,$to_w,$to_h){
global $conf;
if($conf['gdlib'] < 1) return false; //no GDlib available or wanted
// create an image of the given filetype
if ($ext == 'jpg' || $ext == 'jpeg'){
if(!function_exists("imagecreatefromjpeg")) return false;
$image = @imagecreatefromjpeg($from);
}elseif($ext == 'png') {
if(!function_exists("imagecreatefrompng")) return false;
$image = @imagecreatefrompng($from);
}elseif($ext == 'gif') {
if(!function_exists("imagecreatefromgif")) return false;
$image = @imagecreatefromgif($from);
}
if(!$image) return false;
if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor")){
$newimg = @imagecreatetruecolor ($to_w, $to_h);
}
if(!$newimg) $newimg = @imagecreate($to_w, $to_h);
if(!$newimg) return false;
//keep png alpha channel if possible
if($ext == 'png' && $conf['gdlib']>1 && function_exists('imagesavealpha')){
imagealphablending($newimg, false);
imagesavealpha($newimg,true);
}
// create cachedir
//io_makeFileDir($to); // not needed anymore, should exist
//try resampling first
if(function_exists("imagecopyresampled")){
if(!@imagecopyresampled($newimg, $image, 0, 0, 0, 0, $to_w, $to_h, $from_w, $from_h)) {
imagecopyresized($newimg, $image, 0, 0, 0, 0, $to_w, $to_h, $from_w, $from_h);
}
}else{
imagecopyresized($newimg, $image, 0, 0, 0, 0, $to_w, $to_h, $from_w, $from_h);
}
if ($ext == 'jpg' || $ext == 'jpeg'){
if(!function_exists("imagejpeg")) return false;
return imagejpeg($newimg, $to, 70);
}elseif($ext == 'png') {
if(!function_exists("imagepng")) return false;
return imagepng($newimg, $to);
}elseif($ext == 'gif') {
if(!function_exists("imagegif")) return false;
return imagegif($newimg, $to);
}
return false;
}
//Setup VIM: ex: et ts=2 enc=utf-8 :
?>
|
