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 require_once( 'Image.php' );
  16 require_once( 'StreamFile.php' );
  17
  18 // Get input parameters
  19
  20 if ( get_magic_quotes_gpc() ) {
  21         $fileName = stripslashes( $_REQUEST['f'] );
  22         $width = stripslashes( $_REQUEST['w'] );
  23 } else {
  24         $fileName = $_REQUEST['f'];
  25         $width = $_REQUEST['w'];
  26 }
  27
  28 // Some basic input validation
  29
  30 $width = intval( $width );
  31 $fileName = strtr( $fileName, '\\/', '__' );
  32
  33 // Work out paths, carefully avoiding constructing an Image object because that won't work yet
  34
  35 $imagePath = wfImageDir( $fileName ) . '/' . $fileName;
  36 $thumbName = "{$width}px-$fileName";
  37 if ( preg_match( '/\.svg$/', $fileName ) ) {
  38         $thumbName .= '.png';
  39 }
  40 $thumbPath = wfImageThumbDir( $fileName ) . '/' . $thumbName;
  41
  42 if ( file_exists( $thumbPath ) && filemtime( $thumbPath ) >= filemtime( $imagePath ) ) {
  43         wfStreamFile( $thumbPath );
  44         exit;
  45 }
  46
  47 // OK, no valid thumbnail, time to get out the heavy machinery
  48 require_once( 'Setup.php' );
  49
  50 $img = Image::newFromName( $fileName );
  51 if ( $img ) {
  52         $thumb = $img->renderThumb( $width, false );
  53 } else {
  54         $thumb = false;
  55 }
  56
  57 if ( $thumb && $thumb->path ) {
  58         wfStreamFile( $thumb->path );
  59 } else {
  60         $badtitle = wfMsg( 'badtitle' );
  61         $badtitletext = wfMsg( 'badtitletext' );
  62         echo "<html><head>
  63         <title>$badtitle</title>
  64         <body>
  65 <h1>$badtitle</h1>
  66 <p>$badtitletext</p>
  67 </body></html>";
  68 }
  69
  70
  71 ?>