+//--------------------------------------------------------------------------
+
+function wfThumbMain() {
+ wfProfileIn( __METHOD__ );
+ // Get input parameters
+ if ( get_magic_quotes_gpc() ) {
+ $params = array_map( 'stripslashes', $_REQUEST );
+ } else {
+ $params = $_REQUEST;
+ }
+
+ $fileName = isset( $params['f'] ) ? $params['f'] : '';
+ unset( $params['f'] );
+
+ // Backwards compatibility parameters
+ if ( isset( $params['w'] ) ) {
+ $params['width'] = $params['w'];
+ unset( $params['w'] );
+ }
+ if ( isset( $params['p'] ) ) {
+ $params['page'] = $params['p'];
+ }
+ unset( $params['r'] );
+
+ // Is this a thumb of an archived file?
+ $isOld = (isset( $params['archived'] ) && $params['archived']);
+ unset( $params['archived'] );
+
+ // Some basic input validation
+ $fileName = strtr( $fileName, '\\/', '__' );
+
+ // Actually fetch the image. Method depends on whether it is archived or not.
+ if( $isOld ) {
+ // Format is <timestamp>!<name>
+ $bits = explode( '!', $fileName, 2 );
+ if( !isset($bits[1]) ) {
+ wfThumbError( 404, wfMsg( 'badtitletext' ) );
+ return;
+ }
+ $title = Title::makeTitleSafe( NS_FILE, $bits[1] );
+ if( is_null($title) ) {
+ wfThumbError( 404, wfMsg( 'badtitletext' ) );
+ return;
+ }
+ $img = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $fileName );
+ } else {
+ $img = wfLocalFile( $fileName );
+ }
+
+ if ( !$img ) {
+ wfThumbError( 404, wfMsg( 'badtitletext' ) );
+ return;
+ }
+ if ( !$img->exists() ) {
+ wfThumbError( 404, 'The source file for the specified thumbnail does not exist.' );
+ return;
+ }
+ $sourcePath = $img->getPath();
+ if ( $sourcePath === false ) {
+ wfThumbError( 500, 'The source file is not locally accessible.' );
+ return;
+ }
+
+ // Check IMS against the source file
+ // This means that clients can keep a cached copy even after it has been deleted on the server
+ if ( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
+ // Fix IE brokenness
+ $imsString = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
+ // Calculate time
+ wfSuppressWarnings();
+ $imsUnix = strtotime( $imsString );
+ wfRestoreWarnings();
+ $stat = @stat( $sourcePath );
+ if ( $stat['mtime'] <= $imsUnix ) {
+ header( 'HTTP/1.1 304 Not Modified' );
+ return;
+ }
+ }
+
+ // Stream the file if it exists already
+ try {
+ if ( false != ( $thumbName = $img->thumbName( $params ) ) ) {
+ $thumbPath = $img->getThumbPath( $thumbName );
+
+ if ( is_file( $thumbPath ) ) {
+ wfStreamFile( $thumbPath );
+ return;
+ }
+ }
+ } catch ( MWException $e ) {
+ wfThumbError( 500, $e->getHTML() );
+ return;
+ }
+
+ try {
+ $thumb = $img->transform( $params, File::RENDER_NOW );
+ } catch( Exception $ex ) {
+ // Tried to select a page on a non-paged file?
+ $thumb = false;
+ }
+
+ $errorMsg = false;
+ if ( !$thumb ) {
+ $errorMsg = wfMsgHtml( 'thumbnail_error', 'File::transform() returned false' );
+ } elseif ( $thumb->isError() ) {
+ $errorMsg = $thumb->getHtmlMsg();
+ } elseif ( !$thumb->getPath() ) {
+ $errorMsg = wfMsgHtml( 'thumbnail_error', 'No path supplied in thumbnail object' );
+ } elseif ( $thumb->getPath() == $img->getPath() ) {
+ $errorMsg = wfMsgHtml( 'thumbnail_error', 'Image was not scaled, ' .
+ 'is the requested width bigger than the source?' );
+ } else {
+ wfStreamFile( $thumb->getPath() );
+ }
+ if ( $errorMsg !== false ) {
+ wfThumbError( 500, $errorMsg );
+ }
+
+ wfProfileOut( __METHOD__ );