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thumb.php
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<?php
/**
* PHP script to stream out an image thumbnail.
* If the file exists, we make do with abridged MediaWiki initialisation.
*/
define( 'MW_NO_SETUP', 1 );
define( 'MW_NO_OUTPUT_COMPRESSION', 1 );
require_once( './includes/WebStart.php' );
wfProfileIn( 'thumb.php' );
wfProfileIn( 'thumb.php-start' );
require_once( './includes/GlobalFunctions.php' );
require_once( './includes/ImageFunctions.php' );
$wgTrivialMimeDetection = true; //don't use fancy mime detection, just check the file extension for jpg/gif/png.
require_once( './includes/Image.php' );
require_once( './includes/StreamFile.php' );
// Get input parameters
$fileName = isset( $_REQUEST['f'] ) ? $_REQUEST['f'] : '';
$width = isset( $_REQUEST['w'] ) ? intval( $_REQUEST['w'] ) : 0;
$page = isset( $_REQUEST['p'] ) ? intval( $_REQUEST['p'] ) : null;
if ( get_magic_quotes_gpc() ) {
$fileName = stripslashes( $fileName );
}
$pre_render= isset($_REQUEST['r']) && $_REQUEST['r']!="0";
// Some basic input validation
$fileName = strtr( $fileName, '\\/', '__' );
// Work out paths, carefully avoiding constructing an Image object because that won't work yet
$imagePath = wfImageDir( $fileName ) . '/' . $fileName;
$thumbName = "{$width}px-$fileName";
if ( ! is_null( $page ) ) {
$thumbName = 'page' . $page . '-' . $thumbName;
}
if ( $pre_render ) {
$thumbName .= '.png';
}
$thumbPath = wfImageThumbDir( $fileName ) . '/' . $thumbName;
if ( is_file( $thumbPath ) && filemtime( $thumbPath ) >= filemtime( $imagePath ) ) {
wfStreamFile( $thumbPath );
// Can't log profiling data with no Setup.php
exit;
}
// OK, no valid thumbnail, time to get out the heavy machinery
wfProfileOut( 'thumb.php-start' );
require_once( './includes/Setup.php' );
wfProfileIn( 'thumb.php-render' );
$img = Image::newFromName( $fileName );
try {
if ( $img ) {
if ( ! is_null( $page ) ) {
$img->selectPage( $page );
}
$thumb = $img->renderThumb( $width, false );
} else {
$thumb = false;
}
} catch( Exception $ex ) {
// Tried to select a page on a non-paged file?
$thumb = false;
}
if ( $thumb && $thumb->path ) {
wfStreamFile( $thumb->path );
} else {
$badtitle = wfMsg( 'badtitle' );
$badtitletext = wfMsg( 'badtitletext' );
header( 'Cache-Control: no-cache' );
header( 'Content-Type: text/html; charset=utf-8' );
echo "<html><head>
<title>$badtitle</title>
<body>
<h1>$badtitle</h1>
<p>$badtitletext</p>
</body></html>
";
}
wfProfileOut( 'thumb.php-render' );
wfProfileOut( 'thumb.php' );
wfLogProfilingData();
?>