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 define( 'MEDIAWIKI', true );
   9 unset( $IP );
  10 $wgNoOutputBuffer = true;
  11
  12 require_once( './includes/Defines.php' );
  13 require_once( './LocalSettings.php' );
  14 require_once( 'GlobalFunctions.php' );
  15
  16 $wgTrivialMimeDetection = true; //don't use fancy mime detection, just check the file extension for jpg/gif/png.
  17
  18 require_once( 'Image.php' );
  19 require_once( 'StreamFile.php' );
  20
  21 // Get input parameters
  22
  23 if ( get_magic_quotes_gpc() ) {
  24         $fileName = stripslashes( $_REQUEST['f'] );
  25         $width = stripslashes( $_REQUEST['w'] );
  26 } else {
  27         $fileName = $_REQUEST['f'];
  28         $width = $_REQUEST['w'];
  29 }
  30
  31 $pre_render= isset($_REQUEST['r']) && $_REQUEST['r']!="0";
  32
  33 // Some basic input validation
  34
  35 $width = intval( $width );
  36 $fileName = strtr( $fileName, '\\/', '__' );
  37
  38 // Work out paths, carefully avoiding constructing an Image object because that won't work yet
  39
  40 $imagePath = wfImageDir( $fileName ) . '/' . $fileName;
  41 $thumbName = "{$width}px-$fileName";
  42 if ( $pre_render ) {
  43         $thumbName .= '.png';
  44 }
  45 $thumbPath = wfImageThumbDir( $fileName ) . '/' . $thumbName;
  46
  47 if ( file_exists( $thumbPath ) && filemtime( $thumbPath ) >= filemtime( $imagePath ) ) {
  48         wfStreamFile( $thumbPath );
  49         exit;
  50 }
  51
  52 // OK, no valid thumbnail, time to get out the heavy machinery
  53 require_once( 'Setup.php' );
  54
  55 $img = Image::newFromName( $fileName );
  56 if ( $img ) {
  57         $thumb = $img->renderThumb( $width, false );
  58 } else {
  59         $thumb = false;
  60 }
  61
  62 if ( $thumb && $thumb->path ) {
  63         wfStreamFile( $thumb->path );
  64 } else {
  65         $badtitle = wfMsg( 'badtitle' );
  66         $badtitletext = wfMsg( 'badtitletext' );
  67         echo "<html><head>
  68         <title>$badtitle</title>
  69         <body>
  70 <h1>$badtitle</h1>
  71 <p>$badtitletext</p>
  72 </body></html>";
  73 }
  74
  75
  76 ?>