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 define( 'MW_NO_SETUP', 1 );
   8 require_once( './includes/WebStart.php' );
   9 wfProfileIn( 'thumb.php' );
  10 wfProfileIn( 'thumb.php-start' );
  11 require_once( 'GlobalFunctions.php' );
  12 require_once( 'ImageFunctions.php' );
  13
  14 $wgTrivialMimeDetection = true; //don't use fancy mime detection, just check the file extension for jpg/gif/png.
  15
  16 require_once( 'Image.php' );
  17 require_once( 'StreamFile.php' );
  18
  19 // Get input parameters
  20 $p=null;
  21
  22 if ( get_magic_quotes_gpc() ) {
  23         $fileName = stripslashes( $_REQUEST['f'] );
  24         $width = stripslashes( $_REQUEST['w'] );
  25         if ( isset( $_REQUEST['p'] ) ) { // optional page number
  26                 $page = stripslashes( $_REQUEST['p'] );
  27         }
  28 } else {
  29         $fileName = $_REQUEST['f'];
  30         $width = $_REQUEST['w'];
  31         if ( isset( $_REQUEST['p'] ) ) { // optional page number
  32                 $page =  $_REQUEST['p'] ;
  33         }
  34 }
  35
  36 $pre_render= isset($_REQUEST['r']) && $_REQUEST['r']!="0";
  37
  38 // Some basic input validation
  39
  40 $width = intval( $width );
  41 if ( ! is_null( $page ) ) {
  42         $page = intval( $page );
  43 }
  44 $fileName = strtr( $fileName, '\\/', '__' );
  45
  46 // Work out paths, carefully avoiding constructing an Image object because that won't work yet
  47
  48 $imagePath = wfImageDir( $fileName ) . '/' . $fileName;
  49 $thumbName = "{$width}px-$fileName";
  50 if ( ! is_null( $page ) ) {
  51         $thumbName = 'page' . $page . '-' . $thumbName;
  52 }
  53 if ( $pre_render ) {
  54         $thumbName .= '.png';
  55 }
  56 $thumbPath = wfImageThumbDir( $fileName ) . '/' . $thumbName;
  57
  58 if ( is_file( $thumbPath ) && filemtime( $thumbPath ) >= filemtime( $imagePath ) ) {
  59         wfStreamFile( $thumbPath );
  60         // Can't log profiling data with no Setup.php
  61         exit;
  62 }
  63
  64 // OK, no valid thumbnail, time to get out the heavy machinery
  65 wfProfileOut( 'thumb.php-start' );
  66 require_once( 'Setup.php' );
  67 wfProfileIn( 'thumb.php-render' );
  68
  69 $img = Image::newFromName( $fileName );
  70 if ( $img ) {
  71         if ( ! is_null( $page ) ) {
  72                 $img->selectPage( $page );
  73         }
  74         $thumb = $img->renderThumb( $width, false );
  75 } else {
  76         $thumb = false;
  77 }
  78
  79 if ( $thumb && $thumb->path ) {
  80         wfStreamFile( $thumb->path );
  81 } else {
  82         $badtitle = wfMsg( 'badtitle' );
  83         $badtitletext = wfMsg( 'badtitletext' );
  84         echo "<html><head>
  85         <title>$badtitle</title>
  86         <body>
  87 <h1>$badtitle</h1>
  88 <p>$badtitletext</p>
  89 </body></html>";
  90 }
  91
  92 wfProfileOut( 'thumb.php-render' );
  93 wfProfileOut( 'thumb.php' );
  94 wfLogProfilingData();
  95
  96 ?>