/**
* PHP script to stream out an image thumbnail.
*
- * @addtogroup Media
+ * @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.
+if ( isset( $_SERVER['MW_COMPILED'] ) ) {
+ require( 'phase3/includes/WebStart.php' );
+} else {
+ require( dirname( __FILE__ ) . '/includes/WebStart.php' );
+}
-require_once( "$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
+ $uri = str_replace( "%2F", "/", urlencode( $_SERVER['REDIRECT_URL'] ) );
+ # Just get the URI path (REDIRECT_URL is either a full URL or a path)
+ if ( $uri[0] !== '/' ) {
+ $bits = wfParseUrl( $uri );
+ if ( $bits && isset( $bits['path'] ) ) {
+ $uri = $bits['path'];
+ }
+ }
} else {
- $params = $_REQUEST;
+ $uri = $_SERVER['REQUEST_URI'];
+ }
+
+ $params = wfExtractThumbParams( $uri ); // 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'] );
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'] );
// Some basic input validation
$fileName = strtr( $fileName, '\\/', '__' );
- $img = wfLocalFile( $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 ( count( $bits ) != 2 ) {
+ wfThumbError( 404, wfMsg( 'badtitletext' ) );
+ wfProfileOut( __METHOD__ );
+ return;
+ }
+ $title = Title::makeTitleSafe( NS_FILE, $bits[1] );
+ if ( !$title ) {
+ wfThumbError( 404, wfMsg( 'badtitletext' ) );
+ wfProfileOut( __METHOD__ );
+ return;
+ }
+ $img = RepoGroup::singleton()->getLocalRepo()->newFromArchiveName( $title, $fileName );
+ } else {
+ $img = wfLocalFile( $fileName );
+ }
+
+ // Check permissions if there are read restrictions
+ if ( !in_array( 'read', User::getGroupPermissions( array( '*' ) ), true ) ) {
+ if ( !$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;
}
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 $uri String Thumbnail request URI path
+ * @return Array|null associative params array or null
+ */
+function wfExtractThumbParams( $uri ) {
+ $repo = RepoGroup::singleton()->getLocalRepo();
+
+ $zoneURI = $repo->getZoneUrl( 'thumb' );
+ if ( substr( $zoneURI, 0, 1 ) !== '/' ) {
+ $bits = wfParseUrl( $zoneURI );
+ if ( $bits && isset( $bits['path'] ) ) {
+ $zoneURI = $bits['path'];
+ } else {
+ return null;
+ }
+ }
+ $zoneUrlRegex = preg_quote( $zoneURI );
+
+ $hashDirRegex = $subdirRegex = '';
+ for ( $i = 0; $i < $repo->getHashLevels(); $i++ ) {
+ $subdirRegex .= '[0-9a-f]';
+ $hashDirRegex .= "$subdirRegex/";
+ }
+
+ $thumbUrlRegex = "!^$zoneUrlRegex/((archive/|temp/)?$hashDirRegex([^/]*)/([^/]*))$!";
+
+ // Check if this is a valid looking thumbnail request...
+ if ( preg_match( $thumbUrlRegex, $uri, $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( isset( $_SERVER['REQUEST_URI'] ) ? $_SERVER['REQUEST_URI'] : '' );
+ $hostname = htmlspecialchars( wfHostname() );
+ $debug = "<!-- $url -->\n<!-- $hostname -->\n";
+ } else {
+ $debug = "";
+ }
echo <<<EOT
<html><head><title>Error generating thumbnail</title></head>
<body>
<p>
$msg
</p>
+$debug
</body>
</html>
EOT;
}
-
dépôts / lhc / web / wiklou.git / blobdiff