X-Git-Url: https://git.heureux-cyclage.org/?a=blobdiff_plain;f=thumb.php;h=9cfdae4d3469b907e5d74da9c4d0e090216cc920;hb=99d52eee2179fa1951af1c216ac59288720e4f78;hp=6c8dcbff26138708729f5cd5fedabae283593abe;hpb=c184ebec19a9e37a2fa134bdbbe754e495e61d70;p=lhc%2Fweb%2Fwiklou.git

diff --git a/thumb.php b/thumb.php
index 6c8dcbff26..9cfdae4d34 100644
--- a/thumb.php
+++ b/thumb.php
@@ -1,31 +1,104 @@
 <?php
-
 /**
  * PHP script to stream out an image thumbnail.
  *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
  * @file
  * @ingroup Media
  */
-define( 'MW_NO_OUTPUT_COMPRESSION', 1 );
-require_once( './includes/WebStart.php' );
 
-$wgTrivialMimeDetection = true; //don't use fancy mime detection, just check the file extension for jpg/gif/png.
+define( 'MW_NO_OUTPUT_COMPRESSION', 1 );
+if ( isset( $_SERVER['MW_COMPILED'] ) ) {
+	require( 'core/includes/WebStart.php' );
+} else {
+	require( dirname( __FILE__ ) . '/includes/WebStart.php' );
+}
 
-require_once( "$IP/includes/StreamFile.php" );
+// Don't use fancy mime detection, just check the file extension for jpg/gif/png
+$wgTrivialMimeDetection = true;
 
-wfThumbMain();
+if ( defined( 'THUMB_HANDLER' ) ) {
+	// Called from thumb_handler.php via 404; extract params from the URI...
+	wfThumbHandle404();
+} else {
+	// Called directly, use $_REQUEST params
+	wfThumbHandleRequest();
+}
 wfLogProfilingData();
 
 //--------------------------------------------------------------------------
 
-function wfThumbMain() {
-	wfProfileIn( __METHOD__ );
-	// Get input parameters
-	if ( get_magic_quotes_gpc() ) {
-		$params = array_map( 'stripslashes', $_REQUEST );
+/**
+ * Handle a thumbnail request via query parameters
+ *
+ * @return void
+ */
+function wfThumbHandleRequest() {
+	$params = get_magic_quotes_gpc()
+		? array_map( 'stripslashes', $_REQUEST )
+		: $_REQUEST;
+
+	wfStreamThumb( $params ); // stream the thumbnail
+}
+
+/**
+ * Handle a thumbnail request via thumbnail file URL
+ *
+ * @return void
+ */
+function wfThumbHandle404() {
+	# lighttpd puts the original request in REQUEST_URI, while sjs sets
+	# that to the 404 handler, and puts the original request in REDIRECT_URL.
+	if ( isset( $_SERVER['REDIRECT_URL'] ) ) {
+		# The URL is un-encoded, so put it back how it was
+		$uriPath = str_replace( "%2F", "/", urlencode( $_SERVER['REDIRECT_URL'] ) );
 	} else {
-		$params = $_REQUEST;
+		$uriPath = $_SERVER['REQUEST_URI'];
 	}
+	# Just get the URI path (REDIRECT_URL/REQUEST_URI is either a full URL or a path)
+	if ( substr( $uriPath, 0, 1 ) !== '/' ) {
+		$bits = wfParseUrl( $uriPath );
+		if ( $bits && isset( $bits['path'] ) ) {
+			$uriPath = $bits['path'];
+		} else {
+			wfThumbError( 404, 'The source file for the specified thumbnail does not exist.' );
+			return;
+		}
+	}
+
+	$params = wfExtractThumbParams( $uriPath ); // basic wiki URL param extracting
+	if ( $params == null ) {
+		wfThumbError( 404, 'The source file for the specified thumbnail does not exist.' );
+		return;
+	}
+
+	wfStreamThumb( $params ); // stream the thumbnail
+}
+
+/**
+ * Stream a thumbnail specified by parameters
+ *
+ * @param $params Array
+ * @return void
+ */
+function wfStreamThumb( array $params ) {
+	wfProfileIn( __METHOD__ );
+
+	$headers = array(); // HTTP headers to send
 
 	$fileName = isset( $params['f'] ) ? $params['f'] : '';
 	unset( $params['f'] );
@@ -38,44 +111,80 @@ function wfThumbMain() {
 	if ( isset( $params['p'] ) ) {
 		$params['page'] = $params['p'];
 	}
-	unset( $params['r'] );
+	unset( $params['r'] ); // ignore 'r' because we unconditionally pass File::RENDER
 
 	// Is this a thumb of an archived file?
-	$isOld = (isset( $params['archived'] ) && $params['archived']);
-	unset( $params['archived'] );
+	$isOld = ( isset( $params['archived'] ) && $params['archived'] );
+	unset( $params['archived'] ); // handlers don't care
+
+	// Is this a thumb of a temp file?
+	$isTemp = ( isset( $params['temp'] ) && $params['temp'] );
+	unset( $params['temp'] ); // handlers don't care
 
 	// Some basic input validation
 	$fileName = strtr( $fileName, '\\/', '__' );
 
 	// Actually fetch the image. Method depends on whether it is archived or not.
-	if( $isOld ) {
+	if ( $isOld ) {
 		// Format is <timestamp>!<name>
 		$bits = explode( '!', $fileName, 2 );
-		if( !isset($bits[1]) ) {
+		if ( count( $bits ) != 2 ) {
 			wfThumbError( 404, wfMsg( 'badtitletext' ) );
+			wfProfileOut( __METHOD__ );
 			return;
 		}
 		$title = Title::makeTitleSafe( NS_FILE, $bits[1] );
-		if( is_null($title) ) {
+		if ( !$title ) {
 			wfThumbError( 404, wfMsg( 'badtitletext' ) );
+			wfProfileOut( __METHOD__ );
 			return;
 		}
 		$img = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $fileName );
+	} elseif ( $isTemp ) {
+		$repo = RepoGroup::singleton()->getLocalRepo()->getTempRepo();
+		// Format is <timestamp>!<name> or just <name>
+		$bits = explode( '!', $fileName, 2 );
+		// Get the name without the timestamp so hash paths are correctly computed
+		$title = Title::makeTitleSafe( NS_FILE, isset( $bits[1] ) ? $bits[1] : $fileName );
+		if ( !$title ) {
+			wfThumbError( 404, wfMsg( 'badtitletext' ) );
+			wfProfileOut( __METHOD__ );
+			return;
+		}
+		$img = new UnregisteredLocalFile( $title, $repo,
+			$repo->getZonePath( 'public' ) . '/' . $repo->getTempHashPath( $fileName ) . $fileName
+		);
 	} else {
-		$img = RepoGroup::singleton()->getLocalRepo()->findFile( $fileName );
+		$img = wfLocalFile( $fileName );
 	}
 
+	// Check permissions if there are read restrictions
+	if ( !in_array( 'read', User::getGroupPermissions( array( '*' ) ), true ) ) {
+		if ( !$img->getTitle() || !$img->getTitle()->userCan( 'read' ) ) {
+			wfThumbError( 403, 'Access denied. You do not have permission to access ' .
+				'the source file.' );
+			wfProfileOut( __METHOD__ );
+			return;
+		}
+		$headers[] = 'Cache-Control: private';
+		$headers[] = 'Vary: Cookie';
+	}
+
+	// Check the source file storage path
 	if ( !$img ) {
 		wfThumbError( 404, wfMsg( 'badtitletext' ) );
+		wfProfileOut( __METHOD__ );
 		return;
 	}
 	if ( !$img->exists() ) {
 		wfThumbError( 404, 'The source file for the specified thumbnail does not exist.' );
+		wfProfileOut( __METHOD__ );
 		return;
 	}
 	$sourcePath = $img->getPath();
 	if ( $sourcePath === false ) {
 		wfThumbError( 500, 'The source file is not locally accessible.' );
+		wfProfileOut( __METHOD__ );
 		return;
 	}
 
@@ -88,66 +197,155 @@ function wfThumbMain() {
 		wfSuppressWarnings();
 		$imsUnix = strtotime( $imsString );
 		wfRestoreWarnings();
-		$stat = @stat( $sourcePath );
-		if ( $stat['mtime'] <= $imsUnix ) {
+		$sourceTsUnix = wfTimestamp( TS_UNIX, $img->getTimestamp() );
+		if ( $sourceTsUnix <= $imsUnix ) {
 			header( 'HTTP/1.1 304 Not Modified' );
+			wfProfileOut( __METHOD__ );
 			return;
 		}
 	}
 
-	// Stream the file if it exists already
+	// Stream the file if it exists already...
 	try {
-		if ( false != ( $thumbName = $img->thumbName( $params ) ) ) {
+		$thumbName = $img->thumbName( $params );
+		if ( strlen( $thumbName ) ) { // valid params?
+			// For 404 handled thumbnails, we only use the the base name of the URI
+			// for the thumb params and the parent directory for the source file name.
+			// Check that the zone relative path matches up so squid caches won't pick
+			// up thumbs that would not be purged on source file deletion (bug 34231).
+			if ( isset( $params['rel404'] ) // thumbnail was handled via 404
+				&& urldecode( $params['rel404'] ) !== $img->getThumbRel( $thumbName ) )
+			{
+				wfThumbError( 404, 'The source file for the specified thumbnail does not exist.' );
+				wfProfileOut( __METHOD__ );
+				return;
+			}
 			$thumbPath = $img->getThumbPath( $thumbName );
-
-			if ( is_file( $thumbPath ) ) {
-				wfStreamFile( $thumbPath );
+			if ( $img->getRepo()->fileExists( $thumbPath ) ) {
+				$img->getRepo()->streamFile( $thumbPath, $headers );
+				wfProfileOut( __METHOD__ );
 				return;
 			}
 		}
 	} catch ( MWException $e ) {
 		wfThumbError( 500, $e->getHTML() );
+		wfProfileOut( __METHOD__ );
 		return;
 	}
 
+	// Thumbnail isn't already there, so create the new thumbnail...
 	try {
 		$thumb = $img->transform( $params, File::RENDER_NOW );
-	} catch( Exception $ex ) {
+	} catch ( Exception $ex ) {
 		// Tried to select a page on a non-paged file?
 		$thumb = false;
 	}
 
+	// Check for thumbnail generation errors...
 	$errorMsg = false;
 	if ( !$thumb ) {
 		$errorMsg = wfMsgHtml( 'thumbnail_error', 'File::transform() returned false' );
 	} elseif ( $thumb->isError() ) {
 		$errorMsg = $thumb->getHtmlMsg();
-	} elseif ( !$thumb->getPath() ) {
+	} elseif ( !$thumb->hasFile() ) {
 		$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() );
+	} elseif ( $thumb->fileIsSource() ) {
+		$errorMsg = wfMsgHtml( 'thumbnail_error',
+			'Image was not scaled, is the requested width bigger than the source?' );
 	}
+
 	if ( $errorMsg !== false ) {
 		wfThumbError( 500, $errorMsg );
+	} else {
+		// Stream the file if there were no errors
+		$thumb->streamFile( $headers );
 	}
 
 	wfProfileOut( __METHOD__ );
 }
 
+/**
+ * Extract the required params for thumb.php from the thumbnail request URI.
+ * At least 'width' and 'f' should be set if the result is an array.
+ *
+ * @param $uriPath String Thumbnail request URI path
+ * @return Array|null associative params array or null
+ */
+function wfExtractThumbParams( $uriPath ) {
+	$repo = RepoGroup::singleton()->getLocalRepo();
+
+	$zoneUriPath = $repo->getZoneHandlerUrl( 'thumb' )
+		? $repo->getZoneHandlerUrl( 'thumb' ) // custom URL
+		: $repo->getZoneUrl( 'thumb' ); // default to main URL
+	// URL might be relative ("/images") or protocol-relative ("//lang.site/image")
+	$bits = wfParseUrl( wfExpandUrl( $zoneUriPath, PROTO_INTERNAL ) );
+	if ( $bits && isset( $bits['path'] ) ) {
+		$zoneUriPath = $bits['path'];
+	} else {
+		return null;
+	}
+
+	$hashDirRegex = $subdirRegex = '';
+	for ( $i = 0; $i < $repo->getHashLevels(); $i++ ) {
+		$subdirRegex .= '[0-9a-f]';
+		$hashDirRegex .= "$subdirRegex/";
+	}
+
+	$thumbPathRegex = "!^" . preg_quote( $zoneUriPath ) .
+		"/((archive/|temp/)?$hashDirRegex([^/]*)/([^/]*))$!";
+
+	// Check if this is a valid looking thumbnail request...
+	if ( preg_match( $thumbPathRegex, $uriPath, $matches ) ) {
+		list( /* all */, $rel, $archOrTemp, $filename, $thumbname ) = $matches;
+		$filename = urldecode( $filename );
+		$thumbname = urldecode( $thumbname );
+
+		$params = array( 'f' => $filename, 'rel404' => $rel );
+		if ( $archOrTemp == 'archive/' ) {
+			$params['archived'] = 1;
+		} elseif ( $archOrTemp == 'temp/' ) {
+			$params['temp'] = 1;
+		}
+
+		// Check if the parameters can be extracted from the thumbnail name...
+		if ( preg_match( '!^(page(\d*)-)*(\d*)px-[^/]*$!', $thumbname, $matches ) ) {
+			list( /* all */, $pagefull, $pagenum, $size ) = $matches;
+			$params['width'] = $size;
+			if ( $pagenum ) {
+				$params['page'] = $pagenum;
+			}
+			return $params; // valid thumbnail URL
+		// Hooks return false if they manage to *resolve* the parameters
+		} elseif ( !wfRunHooks( 'ExtractThumbParameters', array( $thumbname, &$params ) ) ) {
+			return $params; // valid thumbnail URL (via extension or config)
+		}
+	}
+
+	return null; // not a valid thumbnail URL
+}
+
+/**
+ * Output a thumbnail generation error message
+ *
+ * @param $status integer
+ * @param $msg string
+ * @return void
+ */
 function wfThumbError( $status, $msg ) {
 	global $wgShowHostnames;
+
 	header( 'Cache-Control: no-cache' );
 	header( 'Content-Type: text/html; charset=utf-8' );
 	if ( $status == 404 ) {
 		header( 'HTTP/1.1 404 Not found' );
+	} elseif ( $status == 403 ) {
+		header( 'HTTP/1.1 403 Forbidden' );
+		header( 'Vary: Cookie' );
 	} else {
 		header( 'HTTP/1.1 500 Internal server error' );
 	}
-	if( $wgShowHostnames ) {
-		$url = htmlspecialchars( @$_SERVER['REQUEST_URI'] );
+	if ( $wgShowHostnames ) {
+		$url = htmlspecialchars( isset( $_SERVER['REQUEST_URI'] ) ? $_SERVER['REQUEST_URI'] : '' );
 		$hostname = htmlspecialchars( wfHostname() );
 		$debug = "<!-- $url -->\n<!-- $hostname -->\n";
 	} else {
@@ -166,4 +364,3 @@ $debug
 
 EOT;
 }
-