thumb.php

   1 <?php
   2
   3 /**
   4  * PHP script to stream out an image thumbnail.
   5  * If the file exists, we make do with abridged MediaWiki initialisation.
   6  */
   7
   8 unset( $IP );
   9 define( 'MEDIAWIKI', true );
  10 require_once( './includes/Defines.php' );
  11 require_once( './LocalSettings.php' );
  12 require_once( 'Image.php' );
  13 require_once( 'StreamFile.php' );
  14
  15 // Get input parameters
  16
  17 if ( get_magic_quotes_gpc() ) {
  18         $fileName = stripslashes( $_REQUEST['f'] );
  19         $width = stripslashes( $_REQUEST['w'] );
  20 } else {
  21         $fileName = $_REQUEST['f'];
  22         $width = $_REQUEST['w'];
  23 }
  24
  25 // Some basic input validation
  26
  27 $width = intval( $width );
  28 $fileName = strtr( $fileName, '\\/', '__' );
  29
  30 // Work out paths, carefully avoiding constructing an Image object because that won't work yet
  31
  32 $imagePath = wfImageDir( $fileName ) . '/' . $fileName;
  33 $thumbName = "{$width}px-$fileName";
  34 if ( preg_match( '/\.svg$/', $fileName ) ) {
  35         $thumbName .= '.png';
  36 }
  37 $thumbPath = wfImageThumbDir( $thumbName ) . '/' . $thumbName;
  38
  39 if ( file_exists( $thumbPath ) && filemtime( $thumbPath ) >= filemtime( $imagePath ) ) {
  40         wfStreamFile( $thumbPath );
  41         exit;
  42 }
  43
  44 // OK, no valid thumbnail, time to get out the heavy machinery
  45 require_once( 'Setup.php' );
  46
  47 // Force renderThumb() to actually do something
  48 $wgThumbnailScriptPath = false;
  49 $wgSharedThumbnailScriptPath = false;
  50
  51 $img = Image::newFromName( $fileName );
  52 if ( $img ) {
  53         $thumb = $img->renderThumb( $width );
  54 } else {
  55         $thumb = false;
  56 }
  57
  58 if ( $thumb ) {
  59         wfStreamFile( $thumb->path );
  60 } else {
  61         $badtitle = wfMsg( 'badtitle' );
  62         $badtitletext = wfMsg( 'badtitletext' );
  63         echo "<html><head>
  64         <title>$badtitle</title>
  65         <body>
  66 <h1>$badtitle</h1>
  67 <p>$badtitletext</p>
  68 </body></html>";
  69 }
  70
  71
  72 ?>