1<?php 2/** 3 * DokuWiki media passthrough file 4 * 5 * @license GPL 2 (http://www.gnu.org/licenses/gpl.html) 6 * @author Andreas Gohr <andi@splitbrain.org> 7 */ 8 9 if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../../').'/'); 10 require_once(DOKU_INC.'inc/init.php'); 11 require_once(DOKU_INC.'inc/common.php'); 12 require_once(DOKU_INC.'inc/pageutils.php'); 13 require_once(DOKU_INC.'inc/confutils.php'); 14 require_once(DOKU_INC.'inc/auth.php'); 15 //close sesseion 16 session_write_close(); 17 18 $mimetypes = getMimeTypes(); 19 20 //get input 21 $MEDIA = getID('media'); 22 $CACHE = calc_cache($_REQUEST['cache']); 23 $WIDTH = $_REQUEST['w']; 24 $HEIGHT = $_REQUEST['h']; 25 list($EXT,$MIME) = mimetype($MEDIA); 26 if($EXT === false){ 27 $EXT = 'unknown'; 28 $MIME = 'application/octet-stream'; 29 } 30 31 //media to local file 32 if(preg_match('#^(https?|ftp)://#i',$MEDIA)){ 33 //handle external media 34 $FILE = get_from_URL($MEDIA,$EXT,$CACHE); 35 if(!$FILE){ 36 //download failed - redirect to original URL 37 header('Location: '.$MEDIA); 38 exit; 39 } 40 }else{ 41 $MEDIA = cleanID($MEDIA); 42 if(empty($MEDIA)){ 43 header("HTTP/1.0 400 Bad Request"); 44 print 'Bad request'; 45 exit; 46 } 47 48 //check permissions (namespace only) 49 if(auth_quickaclcheck(getNS($MEDIA).':X') < AUTH_READ){ 50 header("HTTP/1.0 401 Unauthorized"); 51 //fixme add some image for imagefiles 52 print 'Unauthorized'; 53 exit; 54 } 55 $FILE = mediaFN($MEDIA); 56 } 57 58 //check file existance 59 if(!@file_exists($FILE)){ 60 header("HTTP/1.0 404 Not Found"); 61 //FIXME add some default broken image 62 print 'Not Found'; 63 exit; 64 } 65 66 //handle image resizing 67 if((substr($MIME,0,5) == 'image') && $WIDTH){ 68 $FILE = get_resized($FILE,$EXT,$WIDTH,$HEIGHT); 69 } 70 71 72 //FIXME set sane cachecontrol headers 73 //FIXME handle conditional and partial requests 74 75 //send file 76 header("Content-Type: $MIME"); 77 header('Last-Modified: '.date('r',filemtime($FILE))); 78 header('Content-Length: '.filesize($FILE)); 79 header('Cache-Control: private, must-revalidate, post-check=0, pre-check=0'); 80 81 //application mime type is downloadable 82 if(substr($MIME,0,11) == 'application'){ 83 header('Content-Disposition: attachment; filename="'.basename($FILE).'"'); 84 } 85 86 $fp = @fopen($FILE,"rb"); 87 if($fp){ 88 while (!feof($fp)) { 89 @set_time_limit(); // large files can take a lot of time 90 print fread($fp, 16*1024); 91 flush(); 92 } 93 fclose($fp); 94 }else{ 95 header("HTTP/1.0 500 Internal Server Error"); 96 print "Could not read $FILE - bad permissions?"; 97 } 98 99/* ------------------------------------------------------------------------ */ 100 101/** 102 * Resizes the given image to the given size 103 * 104 * @author Andreas Gohr <andi@splitbrain.org> 105 */ 106function get_resized($file, $ext, $w, $h=0){ 107 global $conf; 108 109 $info = getimagesize($file); 110 if(!$h) $h = round(($w * $info[1]) / $info[0]); 111 112 113 //cache 114 $local = getCacheName($file,'.media.'.$w.'x'.$h.'.'.$ext); 115 $mtime = @filemtime($local); // 0 if not exists 116 117 if( $mtime > filemtime($file) || resize_image($ext,$file,$info[0],$info[1],$local,$w,$h) ){ 118 return $local; 119 } 120 //still here? resizing failed 121 return $file; 122} 123 124/** 125 * Returns the wanted cachetime in seconds 126 * 127 * Resolves named constants 128 * 129 * @author Andreas Gohr <andi@splitbrain.org> 130 */ 131function calc_cache($cache){ 132 global $conf; 133 134 if(strtolower($cache) == 'nocache') return 0; //never cache 135 if(strtolower($cache) == 'recache') return $conf['cachetime']; //use standard cache 136 return -1; //cache endless 137} 138 139/** 140 * Download a remote file and return local filename 141 * 142 * returns false if download fails. Uses cached file if available and 143 * wanted 144 * 145 * @author Andreas Gohr <andi@splitbrain.org> 146 */ 147function get_from_URL($url,$ext,$cache){ 148 global $conf; 149 150 $url = strtolower($url); 151 $local = getCacheName($url,".media.$ext"); 152 $mtime = @filemtime($local); // 0 if not exists 153 154 //decide if download needed: 155 156 // never cache exists but no endless cache not exists or expired 157 if( $cache == 0 || ($mtime != 0 && $cache != -1) || $mtime < time()-$cache ){ 158 if(io_download($url,$local)){ 159 return $local; 160 }else{ 161 return false; 162 } 163 } 164 165 //if cache exists use it else 166 if($mtime) return $local; 167 168 //else return false 169 return false; 170} 171 172/** 173 * resize images 174 * 175 * @author Andreas Gohr <andi@splitbrain.org> 176 */ 177function resize_image($ext,$from,$from_w,$from_h,$to,$to_w,$to_h){ 178 global $conf; 179 180 if($conf['gdlib'] < 1) return false; //no GDlib available or wanted 181 182 // create an image of the given filetype 183 if ($ext == 'jpg' || $ext == 'jpeg'){ 184 if(!function_exists("imagecreatefromjpeg")) return false; 185 $image = @imagecreatefromjpeg($from); 186 }elseif($ext == 'png') { 187 if(!function_exists("imagecreatefrompng")) return false; 188 $image = @imagecreatefrompng($from); 189 190 }elseif($ext == 'gif') { 191 if(!function_exists("imagecreatefromgif")) return false; 192 $image = @imagecreatefromgif($from); 193 } 194 if(!$image) return false; 195 196 if(($conf['gdlib']>1) && function_exists("imagecreatetruecolor")){ 197 $newimg = @imagecreatetruecolor ($to_w, $to_h); 198 } 199 if(!$newimg) $newimg = @imagecreate($to_w, $to_h); 200 if(!$newimg) return false; 201 202 //keep png alpha channel if possible 203 if($ext == 'png' && $conf['gdlib']>1 && function_exists('imagesavealpha')){ 204 imagealphablending($newimg, false); 205 imagesavealpha($newimg,true); 206 } 207 208 // create cachedir 209 //io_makeFileDir($to); // not needed anymore, should exist 210 211 //try resampling first 212 if(function_exists("imagecopyresampled")){ 213 if(!@imagecopyresampled($newimg, $image, 0, 0, 0, 0, $to_w, $to_h, $from_w, $from_h)) { 214 imagecopyresized($newimg, $image, 0, 0, 0, 0, $to_w, $to_h, $from_w, $from_h); 215 } 216 }else{ 217 imagecopyresized($newimg, $image, 0, 0, 0, 0, $to_w, $to_h, $from_w, $from_h); 218 } 219 220 if ($ext == 'jpg' || $ext == 'jpeg'){ 221 if(!function_exists("imagejpeg")) return false; 222 return imagejpeg($newimg, $to, 70); 223 }elseif($ext == 'png') { 224 if(!function_exists("imagepng")) return false; 225 return imagepng($newimg, $to); 226 }elseif($ext == 'gif') { 227 if(!function_exists("imagegif")) return false; 228 return imagegif($newimg, $to); 229 } 230 231 return false; 232} 233 234 235//Setup VIM: ex: et ts=2 enc=utf-8 : 236?> 237