diff options
Diffstat (limited to 'includes/filerepo/backend')
| -rw-r--r-- | includes/filerepo/backend/FSFile.php | 233 | ||||
| -rw-r--r-- | includes/filerepo/backend/FSFileBackend.php | 600 | ||||
| -rw-r--r-- | includes/filerepo/backend/FileBackend.php | 1739 | ||||
| -rw-r--r-- | includes/filerepo/backend/FileBackendGroup.php | 156 | ||||
| -rw-r--r-- | includes/filerepo/backend/FileBackendMultiWrite.php | 420 | ||||
| -rw-r--r-- | includes/filerepo/backend/FileOp.php | 697 | ||||
| -rw-r--r-- | includes/filerepo/backend/SwiftFileBackend.php | 877 | ||||
| -rw-r--r-- | includes/filerepo/backend/TempFSFile.php | 92 | ||||
| -rw-r--r-- | includes/filerepo/backend/lockmanager/DBLockManager.php | 469 | ||||
| -rw-r--r-- | includes/filerepo/backend/lockmanager/FSLockManager.php | 202 | ||||
| -rw-r--r-- | includes/filerepo/backend/lockmanager/LSLockManager.php | 295 | ||||
| -rw-r--r-- | includes/filerepo/backend/lockmanager/LockManager.php | 182 | ||||
| -rw-r--r-- | includes/filerepo/backend/lockmanager/LockManagerGroup.php | 89 |
13 files changed, 0 insertions, 6051 deletions
diff --git a/includes/filerepo/backend/FSFile.php b/includes/filerepo/backend/FSFile.php deleted file mode 100644 index 54dd1359..00000000 --- a/includes/filerepo/backend/FSFile.php +++ /dev/null @@ -1,233 +0,0 @@ -<?php -/** - * @file - * @ingroup FileBackend - */ - -/** - * Class representing a non-directory file on the file system - * - * @ingroup FileBackend - */ -class FSFile { - protected $path; // path to file - - /** - * Sets up the file object - * - * @param String $path Path to temporary file on local disk - */ - public function __construct( $path ) { - if ( FileBackend::isStoragePath( $path ) ) { - throw new MWException( __METHOD__ . " given storage path `$path`." ); - } - $this->path = $path; - } - - /** - * Returns the file system path - * - * @return String - */ - public function getPath() { - return $this->path; - } - - /** - * Checks if the file exists - * - * @return bool - */ - public function exists() { - return is_file( $this->path ); - } - - /** - * Get the file size in bytes - * - * @return int|false - */ - public function getSize() { - return filesize( $this->path ); - } - - /** - * Get the file's last-modified timestamp - * - * @return string|false TS_MW timestamp or false on failure - */ - public function getTimestamp() { - wfSuppressWarnings(); - $timestamp = filemtime( $this->path ); - wfRestoreWarnings(); - if ( $timestamp !== false ) { - $timestamp = wfTimestamp( TS_MW, $timestamp ); - } - return $timestamp; - } - - /** - * Guess the MIME type from the file contents alone - * - * @return string - */ - public function getMimeType() { - return MimeMagic::singleton()->guessMimeType( $this->path, false ); - } - - /** - * Get an associative array containing information about - * a file with the given storage path. - * - * @param $ext Mixed: the file extension, or true to extract it from the filename. - * Set it to false to ignore the extension. - * - * @return array - */ - public function getProps( $ext = true ) { - wfProfileIn( __METHOD__ ); - wfDebug( __METHOD__.": Getting file info for $this->path\n" ); - - $info = self::placeholderProps(); - $info['fileExists'] = $this->exists(); - - if ( $info['fileExists'] ) { - $magic = MimeMagic::singleton(); - - # get the file extension - if ( $ext === true ) { - $ext = self::extensionFromPath( $this->path ); - } - - # mime type according to file contents - $info['file-mime'] = $this->getMimeType(); - # logical mime type - $info['mime'] = $magic->improveTypeFromExtension( $info['file-mime'], $ext ); - - list( $info['major_mime'], $info['minor_mime'] ) = File::splitMime( $info['mime'] ); - $info['media_type'] = $magic->getMediaType( $this->path, $info['mime'] ); - - # Get size in bytes - $info['size'] = $this->getSize(); - - # Height, width and metadata - $handler = MediaHandler::getHandler( $info['mime'] ); - if ( $handler ) { - $tempImage = (object)array(); - $info['metadata'] = $handler->getMetadata( $tempImage, $this->path ); - $gis = $handler->getImageSize( $tempImage, $this->path, $info['metadata'] ); - if ( is_array( $gis ) ) { - $info = $this->extractImageSizeInfo( $gis ) + $info; - } - } - $info['sha1'] = $this->getSha1Base36(); - - wfDebug(__METHOD__.": $this->path loaded, {$info['size']} bytes, {$info['mime']}.\n"); - } else { - wfDebug(__METHOD__.": $this->path NOT FOUND!\n"); - } - - wfProfileOut( __METHOD__ ); - return $info; - } - - /** - * Placeholder file properties to use for files that don't exist - * - * @return Array - */ - public static function placeholderProps() { - $info = array(); - $info['fileExists'] = false; - $info['mime'] = null; - $info['media_type'] = MEDIATYPE_UNKNOWN; - $info['metadata'] = ''; - $info['sha1'] = ''; - $info['width'] = 0; - $info['height'] = 0; - $info['bits'] = 0; - return $info; - } - - /** - * Exract image size information - * - * @return Array - */ - protected function extractImageSizeInfo( array $gis ) { - $info = array(); - # NOTE: $gis[2] contains a code for the image type. This is no longer used. - $info['width'] = $gis[0]; - $info['height'] = $gis[1]; - if ( isset( $gis['bits'] ) ) { - $info['bits'] = $gis['bits']; - } else { - $info['bits'] = 0; - } - return $info; - } - - /** - * Get a SHA-1 hash of a file in the local filesystem, in base-36 lower case - * encoding, zero padded to 31 digits. - * - * 160 log 2 / log 36 = 30.95, so the 160-bit hash fills 31 digits in base 36 - * fairly neatly. - * - * @return false|string False on failure - */ - public function getSha1Base36() { - wfProfileIn( __METHOD__ ); - - wfSuppressWarnings(); - $hash = sha1_file( $this->path ); - wfRestoreWarnings(); - if ( $hash !== false ) { - $hash = wfBaseConvert( $hash, 16, 36, 31 ); - } - - wfProfileOut( __METHOD__ ); - return $hash; - } - - /** - * Get the final file extension from a file system path - * - * @param $path string - * @return string - */ - public static function extensionFromPath( $path ) { - $i = strrpos( $path, '.' ); - return strtolower( $i ? substr( $path, $i + 1 ) : '' ); - } - - /** - * Get an associative array containing information about a file in the local filesystem. - * - * @param $path String: absolute local filesystem path - * @param $ext Mixed: the file extension, or true to extract it from the filename. - * Set it to false to ignore the extension. - * - * @return array - */ - public static function getPropsFromPath( $path, $ext = true ) { - $fsFile = new self( $path ); - return $fsFile->getProps( $ext ); - } - - /** - * Get a SHA-1 hash of a file in the local filesystem, in base-36 lower case - * encoding, zero padded to 31 digits. - * - * 160 log 2 / log 36 = 30.95, so the 160-bit hash fills 31 digits in base 36 - * fairly neatly. - * - * @param $path string - * - * @return false|string False on failure - */ - public static function getSha1Base36FromPath( $path ) { - $fsFile = new self( $path ); - return $fsFile->getSha1Base36(); - } -} diff --git a/includes/filerepo/backend/FSFileBackend.php b/includes/filerepo/backend/FSFileBackend.php deleted file mode 100644 index 1a4c44ad..00000000 --- a/includes/filerepo/backend/FSFileBackend.php +++ /dev/null @@ -1,600 +0,0 @@ -<?php -/** - * @file - * @ingroup FileBackend - * @author Aaron Schulz - */ - -/** - * Class for a file system (FS) based file backend. - * - * All "containers" each map to a directory under the backend's base directory. - * For backwards-compatibility, some container paths can be set to custom paths. - * The wiki ID will not be used in any custom paths, so this should be avoided. - * - * Having directories with thousands of files will diminish performance. - * Sharding can be accomplished by using FileRepo-style hash paths. - * - * Status messages should avoid mentioning the internal FS paths. - * PHP warnings are assumed to be logged rather than output. - * - * @ingroup FileBackend - * @since 1.19 - */ -class FSFileBackend extends FileBackendStore { - protected $basePath; // string; directory holding the container directories - /** @var Array Map of container names to root paths */ - protected $containerPaths = array(); // for custom container paths - protected $fileMode; // integer; file permission mode - - protected $hadWarningErrors = array(); - - /** - * @see FileBackendStore::__construct() - * Additional $config params include: - * basePath : File system directory that holds containers. - * containerPaths : Map of container names to custom file system directories. - * This should only be used for backwards-compatibility. - * fileMode : Octal UNIX file permissions to use on files stored. - */ - public function __construct( array $config ) { - parent::__construct( $config ); - - // Remove any possible trailing slash from directories - if ( isset( $config['basePath'] ) ) { - $this->basePath = rtrim( $config['basePath'], '/' ); // remove trailing slash - } else { - $this->basePath = null; // none; containers must have explicit paths - } - - if ( isset( $config['containerPaths'] ) ) { - $this->containerPaths = (array)$config['containerPaths']; - foreach ( $this->containerPaths as &$path ) { - $path = rtrim( $path, '/' ); // remove trailing slash - } - } - - $this->fileMode = isset( $config['fileMode'] ) - ? $config['fileMode'] - : 0644; - } - - /** - * @see FileBackendStore::resolveContainerPath() - */ - protected function resolveContainerPath( $container, $relStoragePath ) { - // Check that container has a root directory - if ( isset( $this->containerPaths[$container] ) || isset( $this->basePath ) ) { - // Check for sane relative paths (assume the base paths are OK) - if ( $this->isLegalRelPath( $relStoragePath ) ) { - return $relStoragePath; - } - } - return null; - } - - /** - * Sanity check a relative file system path for validity - * - * @param $path string Normalized relative path - * @return bool - */ - protected function isLegalRelPath( $path ) { - // Check for file names longer than 255 chars - if ( preg_match( '![^/]{256}!', $path ) ) { // ext3/NTFS - return false; - } - if ( wfIsWindows() ) { // NTFS - return !preg_match( '![:*?"<>|]!', $path ); - } else { - return true; - } - } - - /** - * Given the short (unresolved) and full (resolved) name of - * a container, return the file system path of the container. - * - * @param $shortCont string - * @param $fullCont string - * @return string|null - */ - protected function containerFSRoot( $shortCont, $fullCont ) { - if ( isset( $this->containerPaths[$shortCont] ) ) { - return $this->containerPaths[$shortCont]; - } elseif ( isset( $this->basePath ) ) { - return "{$this->basePath}/{$fullCont}"; - } - return null; // no container base path defined - } - - /** - * Get the absolute file system path for a storage path - * - * @param $storagePath string Storage path - * @return string|null - */ - protected function resolveToFSPath( $storagePath ) { - list( $fullCont, $relPath ) = $this->resolveStoragePathReal( $storagePath ); - if ( $relPath === null ) { - return null; // invalid - } - list( $b, $shortCont, $r ) = FileBackend::splitStoragePath( $storagePath ); - $fsPath = $this->containerFSRoot( $shortCont, $fullCont ); // must be valid - if ( $relPath != '' ) { - $fsPath .= "/{$relPath}"; - } - return $fsPath; - } - - /** - * @see FileBackendStore::isPathUsableInternal() - */ - public function isPathUsableInternal( $storagePath ) { - $fsPath = $this->resolveToFSPath( $storagePath ); - if ( $fsPath === null ) { - return false; // invalid - } - $parentDir = dirname( $fsPath ); - - if ( file_exists( $fsPath ) ) { - $ok = is_file( $fsPath ) && is_writable( $fsPath ); - } else { - $ok = is_dir( $parentDir ) && is_writable( $parentDir ); - } - - return $ok; - } - - /** - * @see FileBackendStore::doStoreInternal() - */ - protected function doStoreInternal( array $params ) { - $status = Status::newGood(); - - $dest = $this->resolveToFSPath( $params['dst'] ); - if ( $dest === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); - return $status; - } - - if ( file_exists( $dest ) ) { - if ( !empty( $params['overwrite'] ) ) { - $ok = unlink( $dest ); - if ( !$ok ) { - $status->fatal( 'backend-fail-delete', $params['dst'] ); - return $status; - } - } else { - $status->fatal( 'backend-fail-alreadyexists', $params['dst'] ); - return $status; - } - } - - $ok = copy( $params['src'], $dest ); - if ( !$ok ) { - $status->fatal( 'backend-fail-store', $params['src'], $params['dst'] ); - return $status; - } - - $this->chmod( $dest ); - - return $status; - } - - /** - * @see FileBackendStore::doCopyInternal() - */ - protected function doCopyInternal( array $params ) { - $status = Status::newGood(); - - $source = $this->resolveToFSPath( $params['src'] ); - if ( $source === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['src'] ); - return $status; - } - - $dest = $this->resolveToFSPath( $params['dst'] ); - if ( $dest === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); - return $status; - } - - if ( file_exists( $dest ) ) { - if ( !empty( $params['overwrite'] ) ) { - $ok = unlink( $dest ); - if ( !$ok ) { - $status->fatal( 'backend-fail-delete', $params['dst'] ); - return $status; - } - } else { - $status->fatal( 'backend-fail-alreadyexists', $params['dst'] ); - return $status; - } - } - - $ok = copy( $source, $dest ); - if ( !$ok ) { - $status->fatal( 'backend-fail-copy', $params['src'], $params['dst'] ); - return $status; - } - - $this->chmod( $dest ); - - return $status; - } - - /** - * @see FileBackendStore::doMoveInternal() - */ - protected function doMoveInternal( array $params ) { - $status = Status::newGood(); - - $source = $this->resolveToFSPath( $params['src'] ); - if ( $source === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['src'] ); - return $status; - } - - $dest = $this->resolveToFSPath( $params['dst'] ); - if ( $dest === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); - return $status; - } - - if ( file_exists( $dest ) ) { - if ( !empty( $params['overwrite'] ) ) { - // Windows does not support moving over existing files - if ( wfIsWindows() ) { - $ok = unlink( $dest ); - if ( !$ok ) { - $status->fatal( 'backend-fail-delete', $params['dst'] ); - return $status; - } - } - } else { - $status->fatal( 'backend-fail-alreadyexists', $params['dst'] ); - return $status; - } - } - - $ok = rename( $source, $dest ); - clearstatcache(); // file no longer at source - if ( !$ok ) { - $status->fatal( 'backend-fail-move', $params['src'], $params['dst'] ); - return $status; - } - - return $status; - } - - /** - * @see FileBackendStore::doDeleteInternal() - */ - protected function doDeleteInternal( array $params ) { - $status = Status::newGood(); - - $source = $this->resolveToFSPath( $params['src'] ); - if ( $source === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['src'] ); - return $status; - } - - if ( !is_file( $source ) ) { - if ( empty( $params['ignoreMissingSource'] ) ) { - $status->fatal( 'backend-fail-delete', $params['src'] ); - } - return $status; // do nothing; either OK or bad status - } - - $ok = unlink( $source ); - if ( !$ok ) { - $status->fatal( 'backend-fail-delete', $params['src'] ); - return $status; - } - - return $status; - } - - /** - * @see FileBackendStore::doCreateInternal() - */ - protected function doCreateInternal( array $params ) { - $status = Status::newGood(); - - $dest = $this->resolveToFSPath( $params['dst'] ); - if ( $dest === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); - return $status; - } - - if ( file_exists( $dest ) ) { - if ( !empty( $params['overwrite'] ) ) { - $ok = unlink( $dest ); - if ( !$ok ) { - $status->fatal( 'backend-fail-delete', $params['dst'] ); - return $status; - } - } else { - $status->fatal( 'backend-fail-alreadyexists', $params['dst'] ); - return $status; - } - } - - $bytes = file_put_contents( $dest, $params['content'] ); - if ( $bytes === false ) { - $status->fatal( 'backend-fail-create', $params['dst'] ); - return $status; - } - - $this->chmod( $dest ); - - return $status; - } - - /** - * @see FileBackendStore::doPrepareInternal() - */ - protected function doPrepareInternal( $fullCont, $dirRel, array $params ) { - $status = Status::newGood(); - list( $b, $shortCont, $r ) = FileBackend::splitStoragePath( $params['dir'] ); - $contRoot = $this->containerFSRoot( $shortCont, $fullCont ); // must be valid - $dir = ( $dirRel != '' ) ? "{$contRoot}/{$dirRel}" : $contRoot; - if ( !wfMkdirParents( $dir ) ) { // make directory and its parents - $status->fatal( 'directorycreateerror', $params['dir'] ); - } elseif ( !is_writable( $dir ) ) { - $status->fatal( 'directoryreadonlyerror', $params['dir'] ); - } elseif ( !is_readable( $dir ) ) { - $status->fatal( 'directorynotreadableerror', $params['dir'] ); - } - return $status; - } - - /** - * @see FileBackendStore::doSecureInternal() - */ - protected function doSecureInternal( $fullCont, $dirRel, array $params ) { - $status = Status::newGood(); - list( $b, $shortCont, $r ) = FileBackend::splitStoragePath( $params['dir'] ); - $contRoot = $this->containerFSRoot( $shortCont, $fullCont ); // must be valid - $dir = ( $dirRel != '' ) ? "{$contRoot}/{$dirRel}" : $contRoot; - // Seed new directories with a blank index.html, to prevent crawling... - if ( !empty( $params['noListing'] ) && !file_exists( "{$dir}/index.html" ) ) { - $bytes = file_put_contents( "{$dir}/index.html", '' ); - if ( !$bytes ) { - $status->fatal( 'backend-fail-create', $params['dir'] . '/index.html' ); - return $status; - } - } - // Add a .htaccess file to the root of the container... - if ( !empty( $params['noAccess'] ) ) { - if ( !file_exists( "{$contRoot}/.htaccess" ) ) { - $bytes = file_put_contents( "{$contRoot}/.htaccess", "Deny from all\n" ); - if ( !$bytes ) { - $storeDir = "mwstore://{$this->name}/{$shortCont}"; - $status->fatal( 'backend-fail-create', "{$storeDir}/.htaccess" ); - return $status; - } - } - } - return $status; - } - - /** - * @see FileBackendStore::doCleanInternal() - */ - protected function doCleanInternal( $fullCont, $dirRel, array $params ) { - $status = Status::newGood(); - list( $b, $shortCont, $r ) = FileBackend::splitStoragePath( $params['dir'] ); - $contRoot = $this->containerFSRoot( $shortCont, $fullCont ); // must be valid - $dir = ( $dirRel != '' ) ? "{$contRoot}/{$dirRel}" : $contRoot; - wfSuppressWarnings(); - if ( is_dir( $dir ) ) { - rmdir( $dir ); // remove directory if empty - } - wfRestoreWarnings(); - return $status; - } - - /** - * @see FileBackendStore::doFileExists() - */ - protected function doGetFileStat( array $params ) { - $source = $this->resolveToFSPath( $params['src'] ); - if ( $source === null ) { - return false; // invalid storage path - } - - $this->trapWarnings(); // don't trust 'false' if there were errors - $stat = is_file( $source ) ? stat( $source ) : false; // regular files only - $hadError = $this->untrapWarnings(); - - if ( $stat ) { - return array( - 'mtime' => wfTimestamp( TS_MW, $stat['mtime'] ), - 'size' => $stat['size'] - ); - } elseif ( !$hadError ) { - return false; // file does not exist - } else { - return null; // failure - } - } - - /** - * @see FileBackendStore::doClearCache() - */ - protected function doClearCache( array $paths = null ) { - clearstatcache(); // clear the PHP file stat cache - } - - /** - * @see FileBackendStore::getFileListInternal() - */ - public function getFileListInternal( $fullCont, $dirRel, array $params ) { - list( $b, $shortCont, $r ) = FileBackend::splitStoragePath( $params['dir'] ); - $contRoot = $this->containerFSRoot( $shortCont, $fullCont ); // must be valid - $dir = ( $dirRel != '' ) ? "{$contRoot}/{$dirRel}" : $contRoot; - $exists = is_dir( $dir ); - if ( !$exists ) { - wfDebug( __METHOD__ . "() given directory does not exist: '$dir'\n" ); - return array(); // nothing under this dir - } - $readable = is_readable( $dir ); - if ( !$readable ) { - wfDebug( __METHOD__ . "() given directory is unreadable: '$dir'\n" ); - return null; // bad permissions? - } - return new FSFileBackendFileList( $dir ); - } - - /** - * @see FileBackendStore::getLocalReference() - */ - public function getLocalReference( array $params ) { - $source = $this->resolveToFSPath( $params['src'] ); - if ( $source === null ) { - return null; - } - return new FSFile( $source ); - } - - /** - * @see FileBackendStore::getLocalCopy() - */ - public function getLocalCopy( array $params ) { - $source = $this->resolveToFSPath( $params['src'] ); - if ( $source === null ) { - return null; - } - - // Create a new temporary file with the same extension... - $ext = FileBackend::extensionFromPath( $params['src'] ); - $tmpFile = TempFSFile::factory( wfBaseName( $source ) . '_', $ext ); - if ( !$tmpFile ) { - return null; - } - $tmpPath = $tmpFile->getPath(); - - // Copy the source file over the temp file - $ok = copy( $source, $tmpPath ); - if ( !$ok ) { - return null; - } - - $this->chmod( $tmpPath ); - - return $tmpFile; - } - - /** - * Chmod a file, suppressing the warnings - * - * @param $path string Absolute file system path - * @return bool Success - */ - protected function chmod( $path ) { - wfSuppressWarnings(); - $ok = chmod( $path, $this->fileMode ); - wfRestoreWarnings(); - - return $ok; - } - - /** - * Listen for E_WARNING errors and track whether any happen - * - * @return bool - */ - protected function trapWarnings() { - $this->hadWarningErrors[] = false; // push to stack - set_error_handler( array( $this, 'handleWarning' ), E_WARNING ); - return false; // invoke normal PHP error handler - } - - /** - * Stop listening for E_WARNING errors and return true if any happened - * - * @return bool - */ - protected function untrapWarnings() { - restore_error_handler(); // restore previous handler - return array_pop( $this->hadWarningErrors ); // pop from stack - } - - private function handleWarning() { - $this->hadWarningErrors[count( $this->hadWarningErrors ) - 1] = true; - return true; // suppress from PHP handler - } -} - -/** - * Wrapper around RecursiveDirectoryIterator that catches - * exception or does any custom behavoir that we may want. - * Do not use this class from places outside FSFileBackend. - * - * @ingroup FileBackend - */ -class FSFileBackendFileList implements Iterator { - /** @var RecursiveIteratorIterator */ - protected $iter; - protected $suffixStart; // integer - protected $pos = 0; // integer - - /** - * @param $dir string file system directory - */ - public function __construct( $dir ) { - $dir = realpath( $dir ); // normalize - $this->suffixStart = strlen( $dir ) + 1; // size of "path/to/dir/" - try { - # Get an iterator that will return leaf nodes (non-directories) - if ( MWInit::classExists( 'FilesystemIterator' ) ) { // PHP >= 5.3 - # RecursiveDirectoryIterator extends FilesystemIterator. - # FilesystemIterator::SKIP_DOTS default is inconsistent in PHP 5.3.x. - $flags = FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::SKIP_DOTS; - $this->iter = new RecursiveIteratorIterator( - new RecursiveDirectoryIterator( $dir, $flags ) ); - } else { // PHP < 5.3 - # RecursiveDirectoryIterator extends DirectoryIterator - $this->iter = new RecursiveIteratorIterator( - new RecursiveDirectoryIterator( $dir ) ); - } - } catch ( UnexpectedValueException $e ) { - $this->iter = null; // bad permissions? deleted? - } - } - - public function current() { - // Return only the relative path and normalize slashes to FileBackend-style - // Make sure to use the realpath since the suffix is based upon that - return str_replace( '\\', '/', - substr( realpath( $this->iter->current() ), $this->suffixStart ) ); - } - - public function key() { - return $this->pos; - } - - public function next() { - try { - $this->iter->next(); - } catch ( UnexpectedValueException $e ) { - $this->iter = null; - } - ++$this->pos; - } - - public function rewind() { - $this->pos = 0; - try { - $this->iter->rewind(); - } catch ( UnexpectedValueException $e ) { - $this->iter = null; - } - } - - public function valid() { - return $this->iter && $this->iter->valid(); - } -} diff --git a/includes/filerepo/backend/FileBackend.php b/includes/filerepo/backend/FileBackend.php deleted file mode 100644 index 9433bcb4..00000000 --- a/includes/filerepo/backend/FileBackend.php +++ /dev/null @@ -1,1739 +0,0 @@ -<?php -/** - * @defgroup FileBackend File backend - * @ingroup FileRepo - * - * This module regroup classes meant for MediaWiki to interacts with - */ - -/** - * @file - * @ingroup FileBackend - * @author Aaron Schulz - */ - -/** - * Base class for all file backend classes (including multi-write backends). - * - * This class defines the methods as abstract that subclasses must implement. - * Outside callers can assume that all backends will have these functions. - * - * All "storage paths" are of the format "mwstore://backend/container/path". - * The paths use UNIX file system (FS) notation, though any particular backend may - * not actually be using a local filesystem. Therefore, the paths are only virtual. - * - * Backend contents are stored under wiki-specific container names by default. - * For legacy reasons, this has no effect for the FS backend class, and per-wiki - * segregation must be done by setting the container paths appropriately. - * - * FS-based backends are somewhat more restrictive due to the existence of real - * directory files; a regular file cannot have the same name as a directory. Other - * backends with virtual directories may not have this limitation. Callers should - * store files in such a way that no files and directories are under the same path. - * - * Methods should avoid throwing exceptions at all costs. - * As a corollary, external dependencies should be kept to a minimum. - * - * @ingroup FileBackend - * @since 1.19 - */ -abstract class FileBackend { - protected $name; // string; unique backend name - protected $wikiId; // string; unique wiki name - protected $readOnly; // string; read-only explanation message - /** @var LockManager */ - protected $lockManager; - - /** - * Create a new backend instance from configuration. - * This should only be called from within FileBackendGroup. - * - * $config includes: - * 'name' : The unique name of this backend. - * This should consist of alphanumberic, '-', and '_' characters. - * This name should not be changed after use. - * 'wikiId' : Prefix to container names that is unique to this wiki. - * This should consist of alphanumberic, '-', and '_' characters. - * 'lockManager' : Registered name of a file lock manager to use. - * 'readOnly' : Write operations are disallowed if this is a non-empty string. - * It should be an explanation for the backend being read-only. - * - * @param $config Array - */ - public function __construct( array $config ) { - $this->name = $config['name']; - if ( !preg_match( '!^[a-zA-Z0-9-_]{1,255}$!', $this->name ) ) { - throw new MWException( "Backend name `{$this->name}` is invalid." ); - } - $this->wikiId = isset( $config['wikiId'] ) - ? $config['wikiId'] - : wfWikiID(); // e.g. "my_wiki-en_" - $this->lockManager = ( $config['lockManager'] instanceof LockManager ) - ? $config['lockManager'] - : LockManagerGroup::singleton()->get( $config['lockManager'] ); - $this->readOnly = isset( $config['readOnly'] ) - ? (string)$config['readOnly'] - : ''; - } - - /** - * Get the unique backend name. - * We may have multiple different backends of the same type. - * For example, we can have two Swift backends using different proxies. - * - * @return string - */ - final public function getName() { - return $this->name; - } - - /** - * Check if this backend is read-only - * - * @return bool - */ - final public function isReadOnly() { - return ( $this->readOnly != '' ); - } - - /** - * Get an explanatory message if this backend is read-only - * - * @return string|false Returns falls if the backend is not read-only - */ - final public function getReadOnlyReason() { - return ( $this->readOnly != '' ) ? $this->readOnly : false; - } - - /** - * This is the main entry point into the backend for write operations. - * Callers supply an ordered list of operations to perform as a transaction. - * Files will be locked, the stat cache cleared, and then the operations attempted. - * If any serious errors occur, all attempted operations will be rolled back. - * - * $ops is an array of arrays. The outer array holds a list of operations. - * Each inner array is a set of key value pairs that specify an operation. - * - * Supported operations and their parameters: - * a) Create a new file in storage with the contents of a string - * array( - * 'op' => 'create', - * 'dst' => <storage path>, - * 'content' => <string of new file contents>, - * 'overwrite' => <boolean>, - * 'overwriteSame' => <boolean> - * ) - * b) Copy a file system file into storage - * array( - * 'op' => 'store', - * 'src' => <file system path>, - * 'dst' => <storage path>, - * 'overwrite' => <boolean>, - * 'overwriteSame' => <boolean> - * ) - * c) Copy a file within storage - * array( - * 'op' => 'copy', - * 'src' => <storage path>, - * 'dst' => <storage path>, - * 'overwrite' => <boolean>, - * 'overwriteSame' => <boolean> - * ) - * d) Move a file within storage - * array( - * 'op' => 'move', - * 'src' => <storage path>, - * 'dst' => <storage path>, - * 'overwrite' => <boolean>, - * 'overwriteSame' => <boolean> - * ) - * e) Delete a file within storage - * array( - * 'op' => 'delete', - * 'src' => <storage path>, - * 'ignoreMissingSource' => <boolean> - * ) - * f) Do nothing (no-op) - * array( - * 'op' => 'null', - * ) - * - * Boolean flags for operations (operation-specific): - * 'ignoreMissingSource' : The operation will simply succeed and do - * nothing if the source file does not exist. - * 'overwrite' : Any destination file will be overwritten. - * 'overwriteSame' : An error will not be given if a file already - * exists at the destination that has the same - * contents as the new contents to be written there. - * - * $opts is an associative of boolean flags, including: - * 'force' : Errors that would normally cause a rollback do not. - * The remaining operations are still attempted if any fail. - * 'nonLocking' : No locks are acquired for the operations. - * This can increase performance for non-critical writes. - * This has no effect unless the 'force' flag is set. - * 'allowStale' : Don't require the latest available data. - * This can increase performance for non-critical writes. - * This has no effect unless the 'force' flag is set. - * - * Remarks on locking: - * File system paths given to operations should refer to files that are - * already locked or otherwise safe from modification from other processes. - * Normally these files will be new temp files, which should be adequate. - * - * Return value: - * This returns a Status, which contains all warnings and fatals that occured - * during the operation. The 'failCount', 'successCount', and 'success' members - * will reflect each operation attempted. The status will be "OK" unless: - * a) unexpected operation errors occurred (network partitions, disk full...) - * b) significant operation errors occured and 'force' was not set - * - * @param $ops Array List of operations to execute in order - * @param $opts Array Batch operation options - * @return Status - */ - final public function doOperations( array $ops, array $opts = array() ) { - if ( $this->isReadOnly() ) { - return Status::newFatal( 'backend-fail-readonly', $this->name, $this->readOnly ); - } - if ( empty( $opts['force'] ) ) { // sanity - unset( $opts['nonLocking'] ); - unset( $opts['allowStale'] ); - } - return $this->doOperationsInternal( $ops, $opts ); - } - - /** - * @see FileBackend::doOperations() - */ - abstract protected function doOperationsInternal( array $ops, array $opts ); - - /** - * Same as doOperations() except it takes a single operation. - * If you are doing a batch of operations that should either - * all succeed or all fail, then use that function instead. - * - * @see FileBackend::doOperations() - * - * @param $op Array Operation - * @param $opts Array Operation options - * @return Status - */ - final public function doOperation( array $op, array $opts = array() ) { - return $this->doOperations( array( $op ), $opts ); - } - - /** - * Performs a single create operation. - * This sets $params['op'] to 'create' and passes it to doOperation(). - * - * @see FileBackend::doOperation() - * - * @param $params Array Operation parameters - * @param $opts Array Operation options - * @return Status - */ - final public function create( array $params, array $opts = array() ) { - $params['op'] = 'create'; - return $this->doOperation( $params, $opts ); - } - - /** - * Performs a single store operation. - * This sets $params['op'] to 'store' and passes it to doOperation(). - * - * @see FileBackend::doOperation() - * - * @param $params Array Operation parameters - * @param $opts Array Operation options - * @return Status - */ - final public function store( array $params, array $opts = array() ) { - $params['op'] = 'store'; - return $this->doOperation( $params, $opts ); - } - - /** - * Performs a single copy operation. - * This sets $params['op'] to 'copy' and passes it to doOperation(). - * - * @see FileBackend::doOperation() - * - * @param $params Array Operation parameters - * @param $opts Array Operation options - * @return Status - */ - final public function copy( array $params, array $opts = array() ) { - $params['op'] = 'copy'; - return $this->doOperation( $params, $opts ); - } - - /** - * Performs a single move operation. - * This sets $params['op'] to 'move' and passes it to doOperation(). - * - * @see FileBackend::doOperation() - * - * @param $params Array Operation parameters - * @param $opts Array Operation options - * @return Status - */ - final public function move( array $params, array $opts = array() ) { - $params['op'] = 'move'; - return $this->doOperation( $params, $opts ); - } - - /** - * Performs a single delete operation. - * This sets $params['op'] to 'delete' and passes it to doOperation(). - * - * @see FileBackend::doOperation() - * - * @param $params Array Operation parameters - * @param $opts Array Operation options - * @return Status - */ - final public function delete( array $params, array $opts = array() ) { - $params['op'] = 'delete'; - return $this->doOperation( $params, $opts ); - } - - /** - * Concatenate a list of storage files into a single file system file. - * The target path should refer to a file that is already locked or - * otherwise safe from modification from other processes. Normally, - * the file will be a new temp file, which should be adequate. - * $params include: - * srcs : ordered source storage paths (e.g. chunk1, chunk2, ...) - * dst : file system path to 0-byte temp file - * - * @param $params Array Operation parameters - * @return Status - */ - abstract public function concatenate( array $params ); - - /** - * Prepare a storage directory for usage. - * This will create any required containers and parent directories. - * Backends using key/value stores only need to create the container. - * - * $params include: - * dir : storage directory - * - * @param $params Array - * @return Status - */ - final public function prepare( array $params ) { - if ( $this->isReadOnly() ) { - return Status::newFatal( 'backend-fail-readonly', $this->name, $this->readOnly ); - } - return $this->doPrepare( $params ); - } - - /** - * @see FileBackend::prepare() - */ - abstract protected function doPrepare( array $params ); - - /** - * Take measures to block web access to a storage directory and - * the container it belongs to. FS backends might add .htaccess - * files whereas key/value store backends might restrict container - * access to the auth user that represents end-users in web request. - * This is not guaranteed to actually do anything. - * - * $params include: - * dir : storage directory - * noAccess : try to deny file access - * noListing : try to deny file listing - * - * @param $params Array - * @return Status - */ - final public function secure( array $params ) { - if ( $this->isReadOnly() ) { - return Status::newFatal( 'backend-fail-readonly', $this->name, $this->readOnly ); - } - $status = $this->doPrepare( $params ); // dir must exist to restrict it - if ( $status->isOK() ) { - $status->merge( $this->doSecure( $params ) ); - } - return $status; - } - - /** - * @see FileBackend::secure() - */ - abstract protected function doSecure( array $params ); - - /** - * Delete a storage directory if it is empty. - * Backends using key/value stores may do nothing unless the directory - * is that of an empty container, in which case it should be deleted. - * - * $params include: - * dir : storage directory - * - * @param $params Array - * @return Status - */ - final public function clean( array $params ) { - if ( $this->isReadOnly() ) { - return Status::newFatal( 'backend-fail-readonly', $this->name, $this->readOnly ); - } - return $this->doClean( $params ); - } - - /** - * @see FileBackend::clean() - */ - abstract protected function doClean( array $params ); - - /** - * Check if a file exists at a storage path in the backend. - * This returns false if only a directory exists at the path. - * - * $params include: - * src : source storage path - * latest : use the latest available data - * - * @param $params Array - * @return bool|null Returns null on failure - */ - abstract public function fileExists( array $params ); - - /** - * Get the last-modified timestamp of the file at a storage path. - * - * $params include: - * src : source storage path - * latest : use the latest available data - * - * @param $params Array - * @return string|false TS_MW timestamp or false on failure - */ - abstract public function getFileTimestamp( array $params ); - - /** - * Get the contents of a file at a storage path in the backend. - * This should be avoided for potentially large files. - * - * $params include: - * src : source storage path - * latest : use the latest available data - * - * @param $params Array - * @return string|false Returns false on failure - */ - abstract public function getFileContents( array $params ); - - /** - * Get the size (bytes) of a file at a storage path in the backend. - * - * $params include: - * src : source storage path - * latest : use the latest available data - * - * @param $params Array - * @return integer|false Returns false on failure - */ - abstract public function getFileSize( array $params ); - - /** - * Get quick information about a file at a storage path in the backend. - * If the file does not exist, then this returns false. - * Otherwise, the result is an associative array that includes: - * mtime : the last-modified timestamp (TS_MW) - * size : the file size (bytes) - * Additional values may be included for internal use only. - * - * $params include: - * src : source storage path - * latest : use the latest available data - * - * @param $params Array - * @return Array|false|null Returns null on failure - */ - abstract public function getFileStat( array $params ); - - /** - * Get a SHA-1 hash of the file at a storage path in the backend. - * - * $params include: - * src : source storage path - * latest : use the latest available data - * - * @param $params Array - * @return string|false Hash string or false on failure - */ - abstract public function getFileSha1Base36( array $params ); - - /** - * Get the properties of the file at a storage path in the backend. - * Returns FSFile::placeholderProps() on failure. - * - * $params include: - * src : source storage path - * latest : use the latest available data - * - * @param $params Array - * @return Array - */ - abstract public function getFileProps( array $params ); - - /** - * Stream the file at a storage path in the backend. - * If the file does not exists, a 404 error will be given. - * Appropriate HTTP headers (Status, Content-Type, Content-Length) - * must be sent if streaming began, while none should be sent otherwise. - * Implementations should flush the output buffer before sending data. - * - * $params include: - * src : source storage path - * headers : additional HTTP headers to send on success - * latest : use the latest available data - * - * @param $params Array - * @return Status - */ - abstract public function streamFile( array $params ); - - /** - * Returns a file system file, identical to the file at a storage path. - * The file returned is either: - * a) A local copy of the file at a storage path in the backend. - * The temporary copy will have the same extension as the source. - * b) An original of the file at a storage path in the backend. - * Temporary files may be purged when the file object falls out of scope. - * - * Write operations should *never* be done on this file as some backends - * may do internal tracking or may be instances of FileBackendMultiWrite. - * In that later case, there are copies of the file that must stay in sync. - * Additionally, further calls to this function may return the same file. - * - * $params include: - * src : source storage path - * latest : use the latest available data - * - * @param $params Array - * @return FSFile|null Returns null on failure - */ - abstract public function getLocalReference( array $params ); - - /** - * Get a local copy on disk of the file at a storage path in the backend. - * The temporary copy will have the same file extension as the source. - * Temporary files may be purged when the file object falls out of scope. - * - * $params include: - * src : source storage path - * latest : use the latest available data - * - * @param $params Array - * @return TempFSFile|null Returns null on failure - */ - abstract public function getLocalCopy( array $params ); - - /** - * Get an iterator to list out all stored files under a storage directory. - * If the directory is of the form "mwstore://backend/container", - * then all files in the container should be listed. - * If the directory is of form "mwstore://backend/container/dir", - * then all files under that container directory should be listed. - * Results should be storage paths relative to the given directory. - * - * Storage backends with eventual consistency might return stale data. - * - * $params include: - * dir : storage path directory - * - * @return Traversable|Array|null Returns null on failure - */ - abstract public function getFileList( array $params ); - - /** - * Invalidate any in-process file existence and property cache. - * If $paths is given, then only the cache for those files will be cleared. - * - * @param $paths Array Storage paths (optional) - * @return void - */ - public function clearCache( array $paths = null ) {} - - /** - * Lock the files at the given storage paths in the backend. - * This will either lock all the files or none (on failure). - * - * Callers should consider using getScopedFileLocks() instead. - * - * @param $paths Array Storage paths - * @param $type integer LockManager::LOCK_* constant - * @return Status - */ - final public function lockFiles( array $paths, $type ) { - return $this->lockManager->lock( $paths, $type ); - } - - /** - * Unlock the files at the given storage paths in the backend. - * - * @param $paths Array Storage paths - * @param $type integer LockManager::LOCK_* constant - * @return Status - */ - final public function unlockFiles( array $paths, $type ) { - return $this->lockManager->unlock( $paths, $type ); - } - - /** - * Lock the files at the given storage paths in the backend. - * This will either lock all the files or none (on failure). - * On failure, the status object will be updated with errors. - * - * Once the return value goes out scope, the locks will be released and - * the status updated. Unlock fatals will not change the status "OK" value. - * - * @param $paths Array Storage paths - * @param $type integer LockManager::LOCK_* constant - * @param $status Status Status to update on lock/unlock - * @return ScopedLock|null Returns null on failure - */ - final public function getScopedFileLocks( array $paths, $type, Status $status ) { - return ScopedLock::factory( $this->lockManager, $paths, $type, $status ); - } - - /** - * Check if a given path is a "mwstore://" path. - * This does not do any further validation or any existence checks. - * - * @param $path string - * @return bool - */ - final public static function isStoragePath( $path ) { - return ( strpos( $path, 'mwstore://' ) === 0 ); - } - - /** - * Split a storage path into a backend name, a container name, - * and a relative file path. The relative path may be the empty string. - * This does not do any path normalization or traversal checks. - * - * @param $storagePath string - * @return Array (backend, container, rel object) or (null, null, null) - */ - final public static function splitStoragePath( $storagePath ) { - if ( self::isStoragePath( $storagePath ) ) { - // Remove the "mwstore://" prefix and split the path - $parts = explode( '/', substr( $storagePath, 10 ), 3 ); - if ( count( $parts ) >= 2 && $parts[0] != '' && $parts[1] != '' ) { - if ( count( $parts ) == 3 ) { - return $parts; // e.g. "backend/container/path" - } else { - return array( $parts[0], $parts[1], '' ); // e.g. "backend/container" - } - } - } - return array( null, null, null ); - } - - /** - * Normalize a storage path by cleaning up directory separators. - * Returns null if the path is not of the format of a valid storage path. - * - * @param $storagePath string - * @return string|null - */ - final public static function normalizeStoragePath( $storagePath ) { - list( $backend, $container, $relPath ) = self::splitStoragePath( $storagePath ); - if ( $relPath !== null ) { // must be for this backend - $relPath = self::normalizeContainerPath( $relPath ); - if ( $relPath !== null ) { - return ( $relPath != '' ) - ? "mwstore://{$backend}/{$container}/{$relPath}" - : "mwstore://{$backend}/{$container}"; - } - } - return null; - } - - /** - * Validate and normalize a relative storage path. - * Null is returned if the path involves directory traversal. - * Traversal is insecure for FS backends and broken for others. - * - * @param $path string Storage path relative to a container - * @return string|null - */ - final protected static function normalizeContainerPath( $path ) { - // Normalize directory separators - $path = strtr( $path, '\\', '/' ); - // Collapse any consecutive directory separators - $path = preg_replace( '![/]{2,}!', '/', $path ); - // Remove any leading directory separator - $path = ltrim( $path, '/' ); - // Use the same traversal protection as Title::secureAndSplit() - if ( strpos( $path, '.' ) !== false ) { - if ( - $path === '.' || - $path === '..' || - strpos( $path, './' ) === 0 || - strpos( $path, '../' ) === 0 || - strpos( $path, '/./' ) !== false || - strpos( $path, '/../' ) !== false - ) { - return null; - } - } - return $path; - } - - /** - * Get the parent storage directory of a storage path. - * This returns a path like "mwstore://backend/container", - * "mwstore://backend/container/...", or null if there is no parent. - * - * @param $storagePath string - * @return string|null - */ - final public static function parentStoragePath( $storagePath ) { - $storagePath = dirname( $storagePath ); - list( $b, $cont, $rel ) = self::splitStoragePath( $storagePath ); - return ( $rel === null ) ? null : $storagePath; - } - - /** - * Get the final extension from a storage or FS path - * - * @param $path string - * @return string - */ - final public static function extensionFromPath( $path ) { - $i = strrpos( $path, '.' ); - return strtolower( $i ? substr( $path, $i + 1 ) : '' ); - } -} - -/** - * @brief Base class for all backends associated with a particular storage medium. - * - * This class defines the methods as abstract that subclasses must implement. - * Outside callers should *not* use functions with "Internal" in the name. - * - * The FileBackend operations are implemented using basic functions - * such as storeInternal(), copyInternal(), deleteInternal() and the like. - * This class is also responsible for path resolution and sanitization. - * - * @ingroup FileBackend - * @since 1.19 - */ -abstract class FileBackendStore extends FileBackend { - /** @var Array Map of paths to small (RAM/disk) cache items */ - protected $cache = array(); // (storage path => key => value) - protected $maxCacheSize = 100; // integer; max paths with entries - /** @var Array Map of paths to large (RAM/disk) cache items */ - protected $expensiveCache = array(); // (storage path => key => value) - protected $maxExpensiveCacheSize = 10; // integer; max paths with entries - - /** @var Array Map of container names to sharding settings */ - protected $shardViaHashLevels = array(); // (container name => config array) - - protected $maxFileSize = 1000000000; // integer bytes (1GB) - - /** - * Get the maximum allowable file size given backend - * medium restrictions and basic performance constraints. - * Do not call this function from places outside FileBackend and FileOp. - * - * @return integer Bytes - */ - final public function maxFileSizeInternal() { - return $this->maxFileSize; - } - - /** - * Check if a file can be created at a given storage path. - * FS backends should check if the parent directory exists and the file is writable. - * Backends using key/value stores should check if the container exists. - * - * @param $storagePath string - * @return bool - */ - abstract public function isPathUsableInternal( $storagePath ); - - /** - * Create a file in the backend with the given contents. - * Do not call this function from places outside FileBackend and FileOp. - * - * $params include: - * content : the raw file contents - * dst : destination storage path - * overwrite : overwrite any file that exists at the destination - * - * @param $params Array - * @return Status - */ - final public function createInternal( array $params ) { - wfProfileIn( __METHOD__ ); - if ( strlen( $params['content'] ) > $this->maxFileSizeInternal() ) { - $status = Status::newFatal( 'backend-fail-create', $params['dst'] ); - } else { - $status = $this->doCreateInternal( $params ); - $this->clearCache( array( $params['dst'] ) ); - } - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackendStore::createInternal() - */ - abstract protected function doCreateInternal( array $params ); - - /** - * Store a file into the backend from a file on disk. - * Do not call this function from places outside FileBackend and FileOp. - * - * $params include: - * src : source path on disk - * dst : destination storage path - * overwrite : overwrite any file that exists at the destination - * - * @param $params Array - * @return Status - */ - final public function storeInternal( array $params ) { - wfProfileIn( __METHOD__ ); - if ( filesize( $params['src'] ) > $this->maxFileSizeInternal() ) { - $status = Status::newFatal( 'backend-fail-store', $params['dst'] ); - } else { - $status = $this->doStoreInternal( $params ); - $this->clearCache( array( $params['dst'] ) ); - } - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackendStore::storeInternal() - */ - abstract protected function doStoreInternal( array $params ); - - /** - * Copy a file from one storage path to another in the backend. - * Do not call this function from places outside FileBackend and FileOp. - * - * $params include: - * src : source storage path - * dst : destination storage path - * overwrite : overwrite any file that exists at the destination - * - * @param $params Array - * @return Status - */ - final public function copyInternal( array $params ) { - wfProfileIn( __METHOD__ ); - $status = $this->doCopyInternal( $params ); - $this->clearCache( array( $params['dst'] ) ); - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackendStore::copyInternal() - */ - abstract protected function doCopyInternal( array $params ); - - /** - * Delete a file at the storage path. - * Do not call this function from places outside FileBackend and FileOp. - * - * $params include: - * src : source storage path - * ignoreMissingSource : do nothing if the source file does not exist - * - * @param $params Array - * @return Status - */ - final public function deleteInternal( array $params ) { - wfProfileIn( __METHOD__ ); - $status = $this->doDeleteInternal( $params ); - $this->clearCache( array( $params['src'] ) ); - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackendStore::deleteInternal() - */ - abstract protected function doDeleteInternal( array $params ); - - /** - * Move a file from one storage path to another in the backend. - * Do not call this function from places outside FileBackend and FileOp. - * - * $params include: - * src : source storage path - * dst : destination storage path - * overwrite : overwrite any file that exists at the destination - * - * @param $params Array - * @return Status - */ - final public function moveInternal( array $params ) { - wfProfileIn( __METHOD__ ); - $status = $this->doMoveInternal( $params ); - $this->clearCache( array( $params['src'], $params['dst'] ) ); - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackendStore::moveInternal() - */ - protected function doMoveInternal( array $params ) { - // Copy source to dest - $status = $this->copyInternal( $params ); - if ( $status->isOK() ) { - // Delete source (only fails due to races or medium going down) - $status->merge( $this->deleteInternal( array( 'src' => $params['src'] ) ) ); - $status->setResult( true, $status->value ); // ignore delete() errors - } - return $status; - } - - /** - * @see FileBackend::concatenate() - */ - final public function concatenate( array $params ) { - wfProfileIn( __METHOD__ ); - $status = Status::newGood(); - - // Try to lock the source files for the scope of this function - $scopeLockS = $this->getScopedFileLocks( $params['srcs'], LockManager::LOCK_UW, $status ); - if ( $status->isOK() ) { - // Actually do the concatenation - $status->merge( $this->doConcatenate( $params ) ); - } - - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackendStore::concatenate() - */ - protected function doConcatenate( array $params ) { - $status = Status::newGood(); - $tmpPath = $params['dst']; // convenience - - // Check that the specified temp file is valid... - wfSuppressWarnings(); - $ok = ( is_file( $tmpPath ) && !filesize( $tmpPath ) ); - wfRestoreWarnings(); - if ( !$ok ) { // not present or not empty - $status->fatal( 'backend-fail-opentemp', $tmpPath ); - return $status; - } - - // Build up the temp file using the source chunks (in order)... - $tmpHandle = fopen( $tmpPath, 'ab' ); - if ( $tmpHandle === false ) { - $status->fatal( 'backend-fail-opentemp', $tmpPath ); - return $status; - } - foreach ( $params['srcs'] as $virtualSource ) { - // Get a local FS version of the chunk - $tmpFile = $this->getLocalReference( array( 'src' => $virtualSource ) ); - if ( !$tmpFile ) { - $status->fatal( 'backend-fail-read', $virtualSource ); - return $status; - } - // Get a handle to the local FS version - $sourceHandle = fopen( $tmpFile->getPath(), 'r' ); - if ( $sourceHandle === false ) { - fclose( $tmpHandle ); - $status->fatal( 'backend-fail-read', $virtualSource ); - return $status; - } - // Append chunk to file (pass chunk size to avoid magic quotes) - if ( !stream_copy_to_stream( $sourceHandle, $tmpHandle ) ) { - fclose( $sourceHandle ); - fclose( $tmpHandle ); - $status->fatal( 'backend-fail-writetemp', $tmpPath ); - return $status; - } - fclose( $sourceHandle ); - } - if ( !fclose( $tmpHandle ) ) { - $status->fatal( 'backend-fail-closetemp', $tmpPath ); - return $status; - } - - clearstatcache(); // temp file changed - - return $status; - } - - /** - * @see FileBackend::doPrepare() - */ - final protected function doPrepare( array $params ) { - wfProfileIn( __METHOD__ ); - - $status = Status::newGood(); - list( $fullCont, $dir, $shard ) = $this->resolveStoragePath( $params['dir'] ); - if ( $dir === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['dir'] ); - wfProfileOut( __METHOD__ ); - return $status; // invalid storage path - } - - if ( $shard !== null ) { // confined to a single container/shard - $status->merge( $this->doPrepareInternal( $fullCont, $dir, $params ) ); - } else { // directory is on several shards - wfDebug( __METHOD__ . ": iterating over all container shards.\n" ); - list( $b, $shortCont, $r ) = self::splitStoragePath( $params['dir'] ); - foreach ( $this->getContainerSuffixes( $shortCont ) as $suffix ) { - $status->merge( $this->doPrepareInternal( "{$fullCont}{$suffix}", $dir, $params ) ); - } - } - - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackendStore::doPrepare() - */ - protected function doPrepareInternal( $container, $dir, array $params ) { - return Status::newGood(); - } - - /** - * @see FileBackend::doSecure() - */ - final protected function doSecure( array $params ) { - wfProfileIn( __METHOD__ ); - $status = Status::newGood(); - - list( $fullCont, $dir, $shard ) = $this->resolveStoragePath( $params['dir'] ); - if ( $dir === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['dir'] ); - wfProfileOut( __METHOD__ ); - return $status; // invalid storage path - } - - if ( $shard !== null ) { // confined to a single container/shard - $status->merge( $this->doSecureInternal( $fullCont, $dir, $params ) ); - } else { // directory is on several shards - wfDebug( __METHOD__ . ": iterating over all container shards.\n" ); - list( $b, $shortCont, $r ) = self::splitStoragePath( $params['dir'] ); - foreach ( $this->getContainerSuffixes( $shortCont ) as $suffix ) { - $status->merge( $this->doSecureInternal( "{$fullCont}{$suffix}", $dir, $params ) ); - } - } - - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackendStore::doSecure() - */ - protected function doSecureInternal( $container, $dir, array $params ) { - return Status::newGood(); - } - - /** - * @see FileBackend::doClean() - */ - final protected function doClean( array $params ) { - wfProfileIn( __METHOD__ ); - $status = Status::newGood(); - - list( $fullCont, $dir, $shard ) = $this->resolveStoragePath( $params['dir'] ); - if ( $dir === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['dir'] ); - wfProfileOut( __METHOD__ ); - return $status; // invalid storage path - } - - // Attempt to lock this directory... - $filesLockEx = array( $params['dir'] ); - $scopedLockE = $this->getScopedFileLocks( $filesLockEx, LockManager::LOCK_EX, $status ); - if ( !$status->isOK() ) { - wfProfileOut( __METHOD__ ); - return $status; // abort - } - - if ( $shard !== null ) { // confined to a single container/shard - $status->merge( $this->doCleanInternal( $fullCont, $dir, $params ) ); - } else { // directory is on several shards - wfDebug( __METHOD__ . ": iterating over all container shards.\n" ); - list( $b, $shortCont, $r ) = self::splitStoragePath( $params['dir'] ); - foreach ( $this->getContainerSuffixes( $shortCont ) as $suffix ) { - $status->merge( $this->doCleanInternal( "{$fullCont}{$suffix}", $dir, $params ) ); - } - } - - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackendStore::doClean() - */ - protected function doCleanInternal( $container, $dir, array $params ) { - return Status::newGood(); - } - - /** - * @see FileBackend::fileExists() - */ - final public function fileExists( array $params ) { - wfProfileIn( __METHOD__ ); - $stat = $this->getFileStat( $params ); - wfProfileOut( __METHOD__ ); - return ( $stat === null ) ? null : (bool)$stat; // null => failure - } - - /** - * @see FileBackend::getFileTimestamp() - */ - final public function getFileTimestamp( array $params ) { - wfProfileIn( __METHOD__ ); - $stat = $this->getFileStat( $params ); - wfProfileOut( __METHOD__ ); - return $stat ? $stat['mtime'] : false; - } - - /** - * @see FileBackend::getFileSize() - */ - final public function getFileSize( array $params ) { - wfProfileIn( __METHOD__ ); - $stat = $this->getFileStat( $params ); - wfProfileOut( __METHOD__ ); - return $stat ? $stat['size'] : false; - } - - /** - * @see FileBackend::getFileStat() - */ - final public function getFileStat( array $params ) { - wfProfileIn( __METHOD__ ); - $path = self::normalizeStoragePath( $params['src'] ); - if ( $path === null ) { - return false; // invalid storage path - } - $latest = !empty( $params['latest'] ); - if ( isset( $this->cache[$path]['stat'] ) ) { - // If we want the latest data, check that this cached - // value was in fact fetched with the latest available data. - if ( !$latest || $this->cache[$path]['stat']['latest'] ) { - wfProfileOut( __METHOD__ ); - return $this->cache[$path]['stat']; - } - } - $stat = $this->doGetFileStat( $params ); - if ( is_array( $stat ) ) { // don't cache negatives - $this->trimCache(); // limit memory - $this->cache[$path]['stat'] = $stat; - $this->cache[$path]['stat']['latest'] = $latest; - } - wfProfileOut( __METHOD__ ); - return $stat; - } - - /** - * @see FileBackendStore::getFileStat() - */ - abstract protected function doGetFileStat( array $params ); - - /** - * @see FileBackend::getFileContents() - */ - public function getFileContents( array $params ) { - wfProfileIn( __METHOD__ ); - $tmpFile = $this->getLocalReference( $params ); - if ( !$tmpFile ) { - wfProfileOut( __METHOD__ ); - return false; - } - wfSuppressWarnings(); - $data = file_get_contents( $tmpFile->getPath() ); - wfRestoreWarnings(); - wfProfileOut( __METHOD__ ); - return $data; - } - - /** - * @see FileBackend::getFileSha1Base36() - */ - final public function getFileSha1Base36( array $params ) { - wfProfileIn( __METHOD__ ); - $path = $params['src']; - if ( isset( $this->cache[$path]['sha1'] ) ) { - wfProfileOut( __METHOD__ ); - return $this->cache[$path]['sha1']; - } - $hash = $this->doGetFileSha1Base36( $params ); - if ( $hash ) { // don't cache negatives - $this->trimCache(); // limit memory - $this->cache[$path]['sha1'] = $hash; - } - wfProfileOut( __METHOD__ ); - return $hash; - } - - /** - * @see FileBackendStore::getFileSha1Base36() - */ - protected function doGetFileSha1Base36( array $params ) { - $fsFile = $this->getLocalReference( $params ); - if ( !$fsFile ) { - return false; - } else { - return $fsFile->getSha1Base36(); - } - } - - /** - * @see FileBackend::getFileProps() - */ - final public function getFileProps( array $params ) { - wfProfileIn( __METHOD__ ); - $fsFile = $this->getLocalReference( $params ); - $props = $fsFile ? $fsFile->getProps() : FSFile::placeholderProps(); - wfProfileOut( __METHOD__ ); - return $props; - } - - /** - * @see FileBackend::getLocalReference() - */ - public function getLocalReference( array $params ) { - wfProfileIn( __METHOD__ ); - $path = $params['src']; - if ( isset( $this->expensiveCache[$path]['localRef'] ) ) { - wfProfileOut( __METHOD__ ); - return $this->expensiveCache[$path]['localRef']; - } - $tmpFile = $this->getLocalCopy( $params ); - if ( $tmpFile ) { // don't cache negatives - $this->trimExpensiveCache(); // limit memory - $this->expensiveCache[$path]['localRef'] = $tmpFile; - } - wfProfileOut( __METHOD__ ); - return $tmpFile; - } - - /** - * @see FileBackend::streamFile() - */ - final public function streamFile( array $params ) { - wfProfileIn( __METHOD__ ); - $status = Status::newGood(); - - $info = $this->getFileStat( $params ); - if ( !$info ) { // let StreamFile handle the 404 - $status->fatal( 'backend-fail-notexists', $params['src'] ); - } - - // Set output buffer and HTTP headers for stream - $extraHeaders = isset( $params['headers'] ) ? $params['headers'] : array(); - $res = StreamFile::prepareForStream( $params['src'], $info, $extraHeaders ); - if ( $res == StreamFile::NOT_MODIFIED ) { - // do nothing; client cache is up to date - } elseif ( $res == StreamFile::READY_STREAM ) { - $status = $this->doStreamFile( $params ); - } else { - $status->fatal( 'backend-fail-stream', $params['src'] ); - } - - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackendStore::streamFile() - */ - protected function doStreamFile( array $params ) { - $status = Status::newGood(); - - $fsFile = $this->getLocalReference( $params ); - if ( !$fsFile ) { - $status->fatal( 'backend-fail-stream', $params['src'] ); - } elseif ( !readfile( $fsFile->getPath() ) ) { - $status->fatal( 'backend-fail-stream', $params['src'] ); - } - - return $status; - } - - /** - * @copydoc FileBackend::getFileList() - */ - final public function getFileList( array $params ) { - list( $fullCont, $dir, $shard ) = $this->resolveStoragePath( $params['dir'] ); - if ( $dir === null ) { // invalid storage path - return null; - } - if ( $shard !== null ) { - // File listing is confined to a single container/shard - return $this->getFileListInternal( $fullCont, $dir, $params ); - } else { - wfDebug( __METHOD__ . ": iterating over all container shards.\n" ); - // File listing spans multiple containers/shards - list( $b, $shortCont, $r ) = self::splitStoragePath( $params['dir'] ); - return new FileBackendStoreShardListIterator( $this, - $fullCont, $dir, $this->getContainerSuffixes( $shortCont ), $params ); - } - } - - /** - * Do not call this function from places outside FileBackend - * - * @see FileBackendStore::getFileList() - * - * @param $container string Resolved container name - * @param $dir string Resolved path relative to container - * @param $params Array - * @return Traversable|Array|null - */ - abstract public function getFileListInternal( $container, $dir, array $params ); - - /** - * Get the list of supported operations and their corresponding FileOp classes. - * - * @return Array - */ - protected function supportedOperations() { - return array( - 'store' => 'StoreFileOp', - 'copy' => 'CopyFileOp', - 'move' => 'MoveFileOp', - 'delete' => 'DeleteFileOp', - 'create' => 'CreateFileOp', - 'null' => 'NullFileOp' - ); - } - - /** - * Return a list of FileOp objects from a list of operations. - * Do not call this function from places outside FileBackend. - * - * The result must have the same number of items as the input. - * An exception is thrown if an unsupported operation is requested. - * - * @param $ops Array Same format as doOperations() - * @return Array List of FileOp objects - * @throws MWException - */ - final public function getOperations( array $ops ) { - $supportedOps = $this->supportedOperations(); - - $performOps = array(); // array of FileOp objects - // Build up ordered array of FileOps... - foreach ( $ops as $operation ) { - $opName = $operation['op']; - if ( isset( $supportedOps[$opName] ) ) { - $class = $supportedOps[$opName]; - // Get params for this operation - $params = $operation; - // Append the FileOp class - $performOps[] = new $class( $this, $params ); - } else { - throw new MWException( "Operation `$opName` is not supported." ); - } - } - - return $performOps; - } - - /** - * @see FileBackend::doOperationsInternal() - */ - protected function doOperationsInternal( array $ops, array $opts ) { - wfProfileIn( __METHOD__ ); - $status = Status::newGood(); - - // Build up a list of FileOps... - $performOps = $this->getOperations( $ops ); - - // Acquire any locks as needed... - if ( empty( $opts['nonLocking'] ) ) { - // Build up a list of files to lock... - $filesLockEx = $filesLockSh = array(); - foreach ( $performOps as $fileOp ) { - $filesLockSh = array_merge( $filesLockSh, $fileOp->storagePathsRead() ); - $filesLockEx = array_merge( $filesLockEx, $fileOp->storagePathsChanged() ); - } - // Optimization: if doing an EX lock anyway, don't also set an SH one - $filesLockSh = array_diff( $filesLockSh, $filesLockEx ); - // Get a shared lock on the parent directory of each path changed - $filesLockSh = array_merge( $filesLockSh, array_map( 'dirname', $filesLockEx ) ); - // Try to lock those files for the scope of this function... - $scopeLockS = $this->getScopedFileLocks( $filesLockSh, LockManager::LOCK_UW, $status ); - $scopeLockE = $this->getScopedFileLocks( $filesLockEx, LockManager::LOCK_EX, $status ); - if ( !$status->isOK() ) { - wfProfileOut( __METHOD__ ); - return $status; // abort - } - } - - // Clear any cache entries (after locks acquired) - $this->clearCache(); - - // Actually attempt the operation batch... - $subStatus = FileOp::attemptBatch( $performOps, $opts ); - - // Merge errors into status fields - $status->merge( $subStatus ); - $status->success = $subStatus->success; // not done in merge() - - wfProfileOut( __METHOD__ ); - return $status; - } - - /** - * @see FileBackend::clearCache() - */ - final public function clearCache( array $paths = null ) { - if ( is_array( $paths ) ) { - $paths = array_map( 'FileBackend::normalizeStoragePath', $paths ); - $paths = array_filter( $paths, 'strlen' ); // remove nulls - } - if ( $paths === null ) { - $this->cache = array(); - $this->expensiveCache = array(); - } else { - foreach ( $paths as $path ) { - unset( $this->cache[$path] ); - unset( $this->expensiveCache[$path] ); - } - } - $this->doClearCache( $paths ); - } - - /** - * Clears any additional stat caches for storage paths - * - * @see FileBackend::clearCache() - * - * @param $paths Array Storage paths (optional) - * @return void - */ - protected function doClearCache( array $paths = null ) {} - - /** - * Prune the inexpensive cache if it is too big to add an item - * - * @return void - */ - protected function trimCache() { - if ( count( $this->cache ) >= $this->maxCacheSize ) { - reset( $this->cache ); - unset( $this->cache[key( $this->cache )] ); - } - } - - /** - * Prune the expensive cache if it is too big to add an item - * - * @return void - */ - protected function trimExpensiveCache() { - if ( count( $this->expensiveCache ) >= $this->maxExpensiveCacheSize ) { - reset( $this->expensiveCache ); - unset( $this->expensiveCache[key( $this->expensiveCache )] ); - } - } - - /** - * Check if a container name is valid. - * This checks for for length and illegal characters. - * - * @param $container string - * @return bool - */ - final protected static function isValidContainerName( $container ) { - // This accounts for Swift and S3 restrictions while leaving room - // for things like '.xxx' (hex shard chars) or '.seg' (segments). - // This disallows directory separators or traversal characters. - // Note that matching strings URL encode to the same string; - // in Swift, the length restriction is *after* URL encoding. - return preg_match( '/^[a-z0-9][a-z0-9-_]{0,199}$/i', $container ); - } - - /** - * Splits a storage path into an internal container name, - * an internal relative file name, and a container shard suffix. - * Any shard suffix is already appended to the internal container name. - * This also checks that the storage path is valid and within this backend. - * - * If the container is sharded but a suffix could not be determined, - * this means that the path can only refer to a directory and can only - * be scanned by looking in all the container shards. - * - * @param $storagePath string - * @return Array (container, path, container suffix) or (null, null, null) if invalid - */ - final protected function resolveStoragePath( $storagePath ) { - list( $backend, $container, $relPath ) = self::splitStoragePath( $storagePath ); - if ( $backend === $this->name ) { // must be for this backend - $relPath = self::normalizeContainerPath( $relPath ); - if ( $relPath !== null ) { - // Get shard for the normalized path if this container is sharded - $cShard = $this->getContainerShard( $container, $relPath ); - // Validate and sanitize the relative path (backend-specific) - $relPath = $this->resolveContainerPath( $container, $relPath ); - if ( $relPath !== null ) { - // Prepend any wiki ID prefix to the container name - $container = $this->fullContainerName( $container ); - if ( self::isValidContainerName( $container ) ) { - // Validate and sanitize the container name (backend-specific) - $container = $this->resolveContainerName( "{$container}{$cShard}" ); - if ( $container !== null ) { - return array( $container, $relPath, $cShard ); - } - } - } - } - } - return array( null, null, null ); - } - - /** - * Like resolveStoragePath() except null values are returned if - * the container is sharded and the shard could not be determined. - * - * @see FileBackendStore::resolveStoragePath() - * - * @param $storagePath string - * @return Array (container, path) or (null, null) if invalid - */ - final protected function resolveStoragePathReal( $storagePath ) { - list( $container, $relPath, $cShard ) = $this->resolveStoragePath( $storagePath ); - if ( $cShard !== null ) { - return array( $container, $relPath ); - } - return array( null, null ); - } - - /** - * Get the container name shard suffix for a given path. - * Any empty suffix means the container is not sharded. - * - * @param $container string Container name - * @param $relStoragePath string Storage path relative to the container - * @return string|null Returns null if shard could not be determined - */ - final protected function getContainerShard( $container, $relPath ) { - list( $levels, $base, $repeat ) = $this->getContainerHashLevels( $container ); - if ( $levels == 1 || $levels == 2 ) { - // Hash characters are either base 16 or 36 - $char = ( $base == 36 ) ? '[0-9a-z]' : '[0-9a-f]'; - // Get a regex that represents the shard portion of paths. - // The concatenation of the captures gives us the shard. - if ( $levels === 1 ) { // 16 or 36 shards per container - $hashDirRegex = '(' . $char . ')'; - } else { // 256 or 1296 shards per container - if ( $repeat ) { // verbose hash dir format (e.g. "a/ab/abc") - $hashDirRegex = $char . '/(' . $char . '{2})'; - } else { // short hash dir format (e.g. "a/b/c") - $hashDirRegex = '(' . $char . ')/(' . $char . ')'; - } - } - // Allow certain directories to be above the hash dirs so as - // to work with FileRepo (e.g. "archive/a/ab" or "temp/a/ab"). - // They must be 2+ chars to avoid any hash directory ambiguity. - $m = array(); - if ( preg_match( "!^(?:[^/]{2,}/)*$hashDirRegex(?:/|$)!", $relPath, $m ) ) { - return '.' . implode( '', array_slice( $m, 1 ) ); - } - return null; // failed to match - } - return ''; // no sharding - } - - /** - * Get the sharding config for a container. - * If greater than 0, then all file storage paths within - * the container are required to be hashed accordingly. - * - * @param $container string - * @return Array (integer levels, integer base, repeat flag) or (0, 0, false) - */ - final protected function getContainerHashLevels( $container ) { - if ( isset( $this->shardViaHashLevels[$container] ) ) { - $config = $this->shardViaHashLevels[$container]; - $hashLevels = (int)$config['levels']; - if ( $hashLevels == 1 || $hashLevels == 2 ) { - $hashBase = (int)$config['base']; - if ( $hashBase == 16 || $hashBase == 36 ) { - return array( $hashLevels, $hashBase, $config['repeat'] ); - } - } - } - return array( 0, 0, false ); // no sharding - } - - /** - * Get a list of full container shard suffixes for a container - * - * @param $container string - * @return Array - */ - final protected function getContainerSuffixes( $container ) { - $shards = array(); - list( $digits, $base ) = $this->getContainerHashLevels( $container ); - if ( $digits > 0 ) { - $numShards = pow( $base, $digits ); - for ( $index = 0; $index < $numShards; $index++ ) { - $shards[] = '.' . wfBaseConvert( $index, 10, $base, $digits ); - } - } - return $shards; - } - - /** - * Get the full container name, including the wiki ID prefix - * - * @param $container string - * @return string - */ - final protected function fullContainerName( $container ) { - if ( $this->wikiId != '' ) { - return "{$this->wikiId}-$container"; - } else { - return $container; - } - } - - /** - * Resolve a container name, checking if it's allowed by the backend. - * This is intended for internal use, such as encoding illegal chars. - * Subclasses can override this to be more restrictive. - * - * @param $container string - * @return string|null - */ - protected function resolveContainerName( $container ) { - return $container; - } - - /** - * Resolve a relative storage path, checking if it's allowed by the backend. - * This is intended for internal use, such as encoding illegal chars or perhaps - * getting absolute paths (e.g. FS based backends). Note that the relative path - * may be the empty string (e.g. the path is simply to the container). - * - * @param $container string Container name - * @param $relStoragePath string Storage path relative to the container - * @return string|null Path or null if not valid - */ - protected function resolveContainerPath( $container, $relStoragePath ) { - return $relStoragePath; - } -} - -/** - * FileBackendStore helper function to handle file listings that span container shards. - * Do not use this class from places outside of FileBackendStore. - * - * @ingroup FileBackend - */ -class FileBackendStoreShardListIterator implements Iterator { - /* @var FileBackendStore */ - protected $backend; - /* @var Array */ - protected $params; - /* @var Array */ - protected $shardSuffixes; - protected $container; // string - protected $directory; // string - - /* @var Traversable */ - protected $iter; - protected $curShard = 0; // integer - protected $pos = 0; // integer - - /** - * @param $backend FileBackendStore - * @param $container string Full storage container name - * @param $dir string Storage directory relative to container - * @param $suffixes Array List of container shard suffixes - * @param $params Array - */ - public function __construct( - FileBackendStore $backend, $container, $dir, array $suffixes, array $params - ) { - $this->backend = $backend; - $this->container = $container; - $this->directory = $dir; - $this->shardSuffixes = $suffixes; - $this->params = $params; - } - - public function current() { - if ( is_array( $this->iter ) ) { - return current( $this->iter ); - } else { - return $this->iter->current(); - } - } - - public function key() { - return $this->pos; - } - - public function next() { - ++$this->pos; - if ( is_array( $this->iter ) ) { - next( $this->iter ); - } else { - $this->iter->next(); - } - // Find the next non-empty shard if no elements are left - $this->nextShardIteratorIfNotValid(); - } - - /** - * If the iterator for this container shard is out of items, - * then move on to the next container that has items. - * If there are none, then it advances to the last container. - */ - protected function nextShardIteratorIfNotValid() { - while ( !$this->valid() ) { - if ( ++$this->curShard >= count( $this->shardSuffixes ) ) { - break; // no more container shards - } - $this->setIteratorFromCurrentShard(); - } - } - - protected function setIteratorFromCurrentShard() { - $suffix = $this->shardSuffixes[$this->curShard]; - $this->iter = $this->backend->getFileListInternal( - "{$this->container}{$suffix}", $this->directory, $this->params ); - } - - public function rewind() { - $this->pos = 0; - $this->curShard = 0; - $this->setIteratorFromCurrentShard(); - // Find the next non-empty shard if this one has no elements - $this->nextShardIteratorIfNotValid(); - } - - public function valid() { - if ( $this->iter == null ) { - return false; // some failure? - } elseif ( is_array( $this->iter ) ) { - return ( current( $this->iter ) !== false ); // no paths can have this value - } else { - return $this->iter->valid(); - } - } -} diff --git a/includes/filerepo/backend/FileBackendGroup.php b/includes/filerepo/backend/FileBackendGroup.php deleted file mode 100644 index 73815cfb..00000000 --- a/includes/filerepo/backend/FileBackendGroup.php +++ /dev/null @@ -1,156 +0,0 @@ -<?php -/** - * @file - * @ingroup FileBackend - * @author Aaron Schulz - */ - -/** - * Class to handle file backend registration - * - * @ingroup FileBackend - * @since 1.19 - */ -class FileBackendGroup { - /** - * @var FileBackendGroup - */ - protected static $instance = null; - - /** @var Array (name => ('class' => string, 'config' => array, 'instance' => object)) */ - protected $backends = array(); - - protected function __construct() {} - protected function __clone() {} - - /** - * @return FileBackendGroup - */ - public static function singleton() { - if ( self::$instance == null ) { - self::$instance = new self(); - self::$instance->initFromGlobals(); - } - return self::$instance; - } - - /** - * Destroy the singleton instance - * - * @return void - */ - public static function destroySingleton() { - self::$instance = null; - } - - /** - * Register file backends from the global variables - * - * @return void - */ - protected function initFromGlobals() { - global $wgLocalFileRepo, $wgForeignFileRepos, $wgFileBackends; - - // Register explicitly defined backends - $this->register( $wgFileBackends ); - - $autoBackends = array(); - // Automatically create b/c backends for file repos... - $repos = array_merge( $wgForeignFileRepos, array( $wgLocalFileRepo ) ); - foreach ( $repos as $info ) { - $backendName = $info['backend']; - if ( is_object( $backendName ) || isset( $this->backends[$backendName] ) ) { - continue; // already defined (or set to the object for some reason) - } - $repoName = $info['name']; - // Local vars that used to be FSRepo members... - $directory = $info['directory']; - $deletedDir = isset( $info['deletedDir'] ) - ? $info['deletedDir'] - : false; // deletion disabled - $thumbDir = isset( $info['thumbDir'] ) - ? $info['thumbDir'] - : "{$directory}/thumb"; - $fileMode = isset( $info['fileMode'] ) - ? $info['fileMode'] - : 0644; - // Get the FS backend configuration - $autoBackends[] = array( - 'name' => $backendName, - 'class' => 'FSFileBackend', - 'lockManager' => 'fsLockManager', - 'containerPaths' => array( - "{$repoName}-public" => "{$directory}", - "{$repoName}-thumb" => $thumbDir, - "{$repoName}-deleted" => $deletedDir, - "{$repoName}-temp" => "{$directory}/temp" - ), - 'fileMode' => $fileMode, - ); - } - - // Register implicitly defined backends - $this->register( $autoBackends ); - } - - /** - * Register an array of file backend configurations - * - * @param $configs Array - * @return void - * @throws MWException - */ - protected function register( array $configs ) { - foreach ( $configs as $config ) { - if ( !isset( $config['name'] ) ) { - throw new MWException( "Cannot register a backend with no name." ); - } - $name = $config['name']; - if ( !isset( $config['class'] ) ) { - throw new MWException( "Cannot register backend `{$name}` with no class." ); - } - $class = $config['class']; - - unset( $config['class'] ); // backend won't need this - $this->backends[$name] = array( - 'class' => $class, - 'config' => $config, - 'instance' => null - ); - } - } - - /** - * Get the backend object with a given name - * - * @param $name string - * @return FileBackend - * @throws MWException - */ - public function get( $name ) { - if ( !isset( $this->backends[$name] ) ) { - throw new MWException( "No backend defined with the name `$name`." ); - } - // Lazy-load the actual backend instance - if ( !isset( $this->backends[$name]['instance'] ) ) { - $class = $this->backends[$name]['class']; - $config = $this->backends[$name]['config']; - $this->backends[$name]['instance'] = new $class( $config ); - } - return $this->backends[$name]['instance']; - } - - /** - * Get an appropriate backend object from a storage path - * - * @param $storagePath string - * @return FileBackend|null Backend or null on failure - */ - public function backendFromPath( $storagePath ) { - list( $backend, $c, $p ) = FileBackend::splitStoragePath( $storagePath ); - if ( $backend !== null && isset( $this->backends[$backend] ) ) { - return $this->get( $backend ); - } - return null; - } -} diff --git a/includes/filerepo/backend/FileBackendMultiWrite.php b/includes/filerepo/backend/FileBackendMultiWrite.php deleted file mode 100644 index c0f1ac57..00000000 --- a/includes/filerepo/backend/FileBackendMultiWrite.php +++ /dev/null @@ -1,420 +0,0 @@ -<?php -/** - * @file - * @ingroup FileBackend - * @author Aaron Schulz - */ - -/** - * This class defines a multi-write backend. Multiple backends can be - * registered to this proxy backend and it will act as a single backend. - * Use this when all access to those backends is through this proxy backend. - * At least one of the backends must be declared the "master" backend. - * - * Only use this class when transitioning from one storage system to another. - * - * Read operations are only done on the 'master' backend for consistency. - * Write operations are performed on all backends, in the order defined. - * If an operation fails on one backend it will be rolled back from the others. - * - * @ingroup FileBackend - * @since 1.19 - */ -class FileBackendMultiWrite extends FileBackend { - /** @var Array Prioritized list of FileBackendStore objects */ - protected $backends = array(); // array of (backend index => backends) - protected $masterIndex = -1; // integer; index of master backend - protected $syncChecks = 0; // integer bitfield - - /* Possible internal backend consistency checks */ - const CHECK_SIZE = 1; - const CHECK_TIME = 2; - - /** - * Construct a proxy backend that consists of several internal backends. - * Additional $config params include: - * 'backends' : Array of backend config and multi-backend settings. - * Each value is the config used in the constructor of a - * FileBackendStore class, but with these additional settings: - * 'class' : The name of the backend class - * 'isMultiMaster' : This must be set for one backend. - * 'syncChecks' : Integer bitfield of internal backend sync checks to perform. - * Possible bits include self::CHECK_SIZE and self::CHECK_TIME. - * The checks are done before allowing any file operations. - * @param $config Array - */ - public function __construct( array $config ) { - parent::__construct( $config ); - $namesUsed = array(); - // Construct backends here rather than via registration - // to keep these backends hidden from outside the proxy. - foreach ( $config['backends'] as $index => $config ) { - $name = $config['name']; - if ( isset( $namesUsed[$name] ) ) { // don't break FileOp predicates - throw new MWException( "Two or more backends defined with the name $name." ); - } - $namesUsed[$name] = 1; - if ( !isset( $config['class'] ) ) { - throw new MWException( 'No class given for a backend config.' ); - } - $class = $config['class']; - $this->backends[$index] = new $class( $config ); - if ( !empty( $config['isMultiMaster'] ) ) { - if ( $this->masterIndex >= 0 ) { - throw new MWException( 'More than one master backend defined.' ); - } - $this->masterIndex = $index; - } - } - if ( $this->masterIndex < 0 ) { // need backends and must have a master - throw new MWException( 'No master backend defined.' ); - } - $this->syncChecks = isset( $config['syncChecks'] ) - ? $config['syncChecks'] - : self::CHECK_SIZE; - } - - /** - * @see FileBackend::doOperationsInternal() - */ - final protected function doOperationsInternal( array $ops, array $opts ) { - $status = Status::newGood(); - - $performOps = array(); // list of FileOp objects - $filesRead = $filesChanged = array(); // storage paths used - // Build up a list of FileOps. The list will have all the ops - // for one backend, then all the ops for the next, and so on. - // These batches of ops are all part of a continuous array. - // Also build up a list of files read/changed... - foreach ( $this->backends as $index => $backend ) { - $backendOps = $this->substOpBatchPaths( $ops, $backend ); - // Add on the operation batch for this backend - $performOps = array_merge( $performOps, $backend->getOperations( $backendOps ) ); - if ( $index == 0 ) { // first batch - // Get the files used for these operations. Each backend has a batch of - // the same operations, so we only need to get them from the first batch. - foreach ( $performOps as $fileOp ) { - $filesRead = array_merge( $filesRead, $fileOp->storagePathsRead() ); - $filesChanged = array_merge( $filesChanged, $fileOp->storagePathsChanged() ); - } - // Get the paths under the proxy backend's name - $filesRead = $this->unsubstPaths( $filesRead ); - $filesChanged = $this->unsubstPaths( $filesChanged ); - } - } - - // Try to lock those files for the scope of this function... - if ( empty( $opts['nonLocking'] ) ) { - $filesLockSh = array_diff( $filesRead, $filesChanged ); // optimization - $filesLockEx = $filesChanged; - // Get a shared lock on the parent directory of each path changed - $filesLockSh = array_merge( $filesLockSh, array_map( 'dirname', $filesLockEx ) ); - // Try to lock those files for the scope of this function... - $scopeLockS = $this->getScopedFileLocks( $filesLockSh, LockManager::LOCK_UW, $status ); - $scopeLockE = $this->getScopedFileLocks( $filesLockEx, LockManager::LOCK_EX, $status ); - if ( !$status->isOK() ) { - return $status; // abort - } - } - - // Clear any cache entries (after locks acquired) - $this->clearCache(); - - // Do a consistency check to see if the backends agree - if ( count( $this->backends ) > 1 ) { - $status->merge( $this->consistencyCheck( array_merge( $filesRead, $filesChanged ) ) ); - if ( !$status->isOK() ) { - return $status; // abort - } - } - - // Actually attempt the operation batch... - $subStatus = FileOp::attemptBatch( $performOps, $opts ); - - $success = array(); - $failCount = $successCount = 0; - // Make 'success', 'successCount', and 'failCount' fields reflect - // the overall operation, rather than all the batches for each backend. - // Do this by only using success values from the master backend's batch. - $batchStart = $this->masterIndex * count( $ops ); - $batchEnd = $batchStart + count( $ops ) - 1; - for ( $i = $batchStart; $i <= $batchEnd; $i++ ) { - if ( !isset( $subStatus->success[$i] ) ) { - break; // failed out before trying this op - } elseif ( $subStatus->success[$i] ) { - ++$successCount; - } else { - ++$failCount; - } - $success[] = $subStatus->success[$i]; - } - $subStatus->success = $success; - $subStatus->successCount = $successCount; - $subStatus->failCount = $failCount; - - // Merge errors into status fields - $status->merge( $subStatus ); - $status->success = $subStatus->success; // not done in merge() - - return $status; - } - - /** - * Check that a set of files are consistent across all internal backends - * - * @param $paths Array - * @return Status - */ - public function consistencyCheck( array $paths ) { - $status = Status::newGood(); - if ( $this->syncChecks == 0 ) { - return $status; // skip checks - } - - $mBackend = $this->backends[$this->masterIndex]; - foreach ( array_unique( $paths ) as $path ) { - $params = array( 'src' => $path, 'latest' => true ); - // Stat the file on the 'master' backend - $mStat = $mBackend->getFileStat( $this->substOpPaths( $params, $mBackend ) ); - // Check of all clone backends agree with the master... - foreach ( $this->backends as $index => $cBackend ) { - if ( $index === $this->masterIndex ) { - continue; // master - } - $cStat = $cBackend->getFileStat( $this->substOpPaths( $params, $cBackend ) ); - if ( $mStat ) { // file is in master - if ( !$cStat ) { // file should exist - $status->fatal( 'backend-fail-synced', $path ); - continue; - } - if ( $this->syncChecks & self::CHECK_SIZE ) { - if ( $cStat['size'] != $mStat['size'] ) { // wrong size - $status->fatal( 'backend-fail-synced', $path ); - continue; - } - } - if ( $this->syncChecks & self::CHECK_TIME ) { - $mTs = wfTimestamp( TS_UNIX, $mStat['mtime'] ); - $cTs = wfTimestamp( TS_UNIX, $cStat['mtime'] ); - if ( abs( $mTs - $cTs ) > 30 ) { // outdated file somewhere - $status->fatal( 'backend-fail-synced', $path ); - continue; - } - } - } else { // file is not in master - if ( $cStat ) { // file should not exist - $status->fatal( 'backend-fail-synced', $path ); - } - } - } - } - - return $status; - } - - /** - * Substitute the backend name in storage path parameters - * for a set of operations with that of a given internal backend. - * - * @param $ops Array List of file operation arrays - * @param $backend FileBackendStore - * @return Array - */ - protected function substOpBatchPaths( array $ops, FileBackendStore $backend ) { - $newOps = array(); // operations - foreach ( $ops as $op ) { - $newOp = $op; // operation - foreach ( array( 'src', 'srcs', 'dst', 'dir' ) as $par ) { - if ( isset( $newOp[$par] ) ) { // string or array - $newOp[$par] = $this->substPaths( $newOp[$par], $backend ); - } - } - $newOps[] = $newOp; - } - return $newOps; - } - - /** - * Same as substOpBatchPaths() but for a single operation - * - * @param $op File operation array - * @param $backend FileBackendStore - * @return Array - */ - protected function substOpPaths( array $ops, FileBackendStore $backend ) { - $newOps = $this->substOpBatchPaths( array( $ops ), $backend ); - return $newOps[0]; - } - - /** - * Substitute the backend of storage paths with an internal backend's name - * - * @param $paths Array|string List of paths or single string path - * @param $backend FileBackendStore - * @return Array|string - */ - protected function substPaths( $paths, FileBackendStore $backend ) { - return preg_replace( - '!^mwstore://' . preg_quote( $this->name ) . '/!', - StringUtils::escapeRegexReplacement( "mwstore://{$backend->getName()}/" ), - $paths // string or array - ); - } - - /** - * Substitute the backend of internal storage paths with the proxy backend's name - * - * @param $paths Array|string List of paths or single string path - * @return Array|string - */ - protected function unsubstPaths( $paths ) { - return preg_replace( - '!^mwstore://([^/]+)!', - StringUtils::escapeRegexReplacement( "mwstore://{$this->name}" ), - $paths // string or array - ); - } - - /** - * @see FileBackend::doPrepare() - */ - public function doPrepare( array $params ) { - $status = Status::newGood(); - foreach ( $this->backends as $backend ) { - $realParams = $this->substOpPaths( $params, $backend ); - $status->merge( $backend->doPrepare( $realParams ) ); - } - return $status; - } - - /** - * @see FileBackend::doSecure() - */ - public function doSecure( array $params ) { - $status = Status::newGood(); - foreach ( $this->backends as $backend ) { - $realParams = $this->substOpPaths( $params, $backend ); - $status->merge( $backend->doSecure( $realParams ) ); - } - return $status; - } - - /** - * @see FileBackend::doClean() - */ - public function doClean( array $params ) { - $status = Status::newGood(); - foreach ( $this->backends as $backend ) { - $realParams = $this->substOpPaths( $params, $backend ); - $status->merge( $backend->doClean( $realParams ) ); - } - return $status; - } - - /** - * @see FileBackend::getFileList() - */ - public function concatenate( array $params ) { - // We are writing to an FS file, so we don't need to do this per-backend - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->concatenate( $realParams ); - } - - /** - * @see FileBackend::fileExists() - */ - public function fileExists( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->fileExists( $realParams ); - } - - /** - * @see FileBackend::getFileTimestamp() - */ - public function getFileTimestamp( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->getFileTimestamp( $realParams ); - } - - /** - * @see FileBackend::getFileSize() - */ - public function getFileSize( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->getFileSize( $realParams ); - } - - /** - * @see FileBackend::getFileStat() - */ - public function getFileStat( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->getFileStat( $realParams ); - } - - /** - * @see FileBackend::getFileContents() - */ - public function getFileContents( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->getFileContents( $realParams ); - } - - /** - * @see FileBackend::getFileSha1Base36() - */ - public function getFileSha1Base36( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->getFileSha1Base36( $realParams ); - } - - /** - * @see FileBackend::getFileProps() - */ - public function getFileProps( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->getFileProps( $realParams ); - } - - /** - * @see FileBackend::streamFile() - */ - public function streamFile( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->streamFile( $realParams ); - } - - /** - * @see FileBackend::getLocalReference() - */ - public function getLocalReference( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->getLocalReference( $realParams ); - } - - /** - * @see FileBackend::getLocalCopy() - */ - public function getLocalCopy( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->getLocalCopy( $realParams ); - } - - /** - * @see FileBackend::getFileList() - */ - public function getFileList( array $params ) { - $realParams = $this->substOpPaths( $params, $this->backends[$this->masterIndex] ); - return $this->backends[$this->masterIndex]->getFileList( $realParams ); - } - - /** - * @see FileBackend::clearCache() - */ - public function clearCache( array $paths = null ) { - foreach ( $this->backends as $backend ) { - $realPaths = is_array( $paths ) ? $this->substPaths( $paths, $backend ) : null; - $backend->clearCache( $realPaths ); - } - } -} diff --git a/includes/filerepo/backend/FileOp.php b/includes/filerepo/backend/FileOp.php deleted file mode 100644 index 5844c9f2..00000000 --- a/includes/filerepo/backend/FileOp.php +++ /dev/null @@ -1,697 +0,0 @@ -<?php -/** - * @file - * @ingroup FileBackend - * @author Aaron Schulz - */ - -/** - * Helper class for representing operations with transaction support. - * Do not use this class from places outside FileBackend. - * - * Methods called from attemptBatch() should avoid throwing exceptions at all costs. - * FileOp objects should be lightweight in order to support large arrays in memory. - * - * @ingroup FileBackend - * @since 1.19 - */ -abstract class FileOp { - /** @var Array */ - protected $params = array(); - /** @var FileBackendStore */ - protected $backend; - - protected $state = self::STATE_NEW; // integer - protected $failed = false; // boolean - protected $useLatest = true; // boolean - - protected $sourceSha1; // string - protected $destSameAsSource; // boolean - - /* Object life-cycle */ - const STATE_NEW = 1; - const STATE_CHECKED = 2; - const STATE_ATTEMPTED = 3; - - /* Timeout related parameters */ - const MAX_BATCH_SIZE = 1000; - const TIME_LIMIT_SEC = 300; // 5 minutes - - /** - * Build a new file operation transaction - * - * @params $backend FileBackendStore - * @params $params Array - * @throws MWException - */ - final public function __construct( FileBackendStore $backend, array $params ) { - $this->backend = $backend; - list( $required, $optional ) = $this->allowedParams(); - foreach ( $required as $name ) { - if ( isset( $params[$name] ) ) { - $this->params[$name] = $params[$name]; - } else { - throw new MWException( "File operation missing parameter '$name'." ); - } - } - foreach ( $optional as $name ) { - if ( isset( $params[$name] ) ) { - $this->params[$name] = $params[$name]; - } - } - $this->params = $params; - } - - /** - * Allow stale data for file reads and existence checks - * - * @return void - */ - final protected function allowStaleReads() { - $this->useLatest = false; - } - - /** - * Attempt a series of file operations. - * Callers are responsible for handling file locking. - * - * $opts is an array of options, including: - * 'force' : Errors that would normally cause a rollback do not. - * The remaining operations are still attempted if any fail. - * 'allowStale' : Don't require the latest available data. - * This can increase performance for non-critical writes. - * This has no effect unless the 'force' flag is set. - * - * The resulting Status will be "OK" unless: - * a) unexpected operation errors occurred (network partitions, disk full...) - * b) significant operation errors occured and 'force' was not set - * - * @param $performOps Array List of FileOp operations - * @param $opts Array Batch operation options - * @return Status - */ - final public static function attemptBatch( array $performOps, array $opts ) { - $status = Status::newGood(); - - $allowStale = !empty( $opts['allowStale'] ); - $ignoreErrors = !empty( $opts['force'] ); - - $n = count( $performOps ); - if ( $n > self::MAX_BATCH_SIZE ) { - $status->fatal( 'backend-fail-batchsize', $n, self::MAX_BATCH_SIZE ); - return $status; - } - - $predicates = FileOp::newPredicates(); // account for previous op in prechecks - // Do pre-checks for each operation; abort on failure... - foreach ( $performOps as $index => $fileOp ) { - if ( $allowStale ) { - $fileOp->allowStaleReads(); // allow potentially stale reads - } - $subStatus = $fileOp->precheck( $predicates ); - $status->merge( $subStatus ); - if ( !$subStatus->isOK() ) { // operation failed? - $status->success[$index] = false; - ++$status->failCount; - if ( !$ignoreErrors ) { - return $status; // abort - } - } - } - - if ( $ignoreErrors ) { - # Treat all precheck() fatals as merely warnings - $status->setResult( true, $status->value ); - } - - // Restart PHP's execution timer and set the timeout to safe amount. - // This handles cases where the operations take a long time or where we are - // already running low on time left. The old timeout is restored afterwards. - # @TODO: re-enable this for when the number of batches is high. - #$scopedTimeLimit = new FileOpScopedPHPTimeout( self::TIME_LIMIT_SEC ); - - // Attempt each operation... - foreach ( $performOps as $index => $fileOp ) { - if ( $fileOp->failed() ) { - continue; // nothing to do - } - $subStatus = $fileOp->attempt(); - $status->merge( $subStatus ); - if ( $subStatus->isOK() ) { - $status->success[$index] = true; - ++$status->successCount; - } else { - $status->success[$index] = false; - ++$status->failCount; - // We can't continue (even with $ignoreErrors) as $predicates is wrong. - // Log the remaining ops as failed for recovery... - for ( $i = ($index + 1); $i < count( $performOps ); $i++ ) { - $performOps[$i]->logFailure( 'attempt_aborted' ); - } - return $status; // bail out - } - } - - return $status; - } - - /** - * Get the value of the parameter with the given name - * - * @param $name string - * @return mixed Returns null if the parameter is not set - */ - final public function getParam( $name ) { - return isset( $this->params[$name] ) ? $this->params[$name] : null; - } - - /** - * Check if this operation failed precheck() or attempt() - * - * @return bool - */ - final public function failed() { - return $this->failed; - } - - /** - * Get a new empty predicates array for precheck() - * - * @return Array - */ - final public static function newPredicates() { - return array( 'exists' => array(), 'sha1' => array() ); - } - - /** - * Check preconditions of the operation without writing anything - * - * @param $predicates Array - * @return Status - */ - final public function precheck( array &$predicates ) { - if ( $this->state !== self::STATE_NEW ) { - return Status::newFatal( 'fileop-fail-state', self::STATE_NEW, $this->state ); - } - $this->state = self::STATE_CHECKED; - $status = $this->doPrecheck( $predicates ); - if ( !$status->isOK() ) { - $this->failed = true; - } - return $status; - } - - /** - * Attempt the operation, backing up files as needed; this must be reversible - * - * @return Status - */ - final public function attempt() { - if ( $this->state !== self::STATE_CHECKED ) { - return Status::newFatal( 'fileop-fail-state', self::STATE_CHECKED, $this->state ); - } elseif ( $this->failed ) { // failed precheck - return Status::newFatal( 'fileop-fail-attempt-precheck' ); - } - $this->state = self::STATE_ATTEMPTED; - $status = $this->doAttempt(); - if ( !$status->isOK() ) { - $this->failed = true; - $this->logFailure( 'attempt' ); - } - return $status; - } - - /** - * Get the file operation parameters - * - * @return Array (required params list, optional params list) - */ - protected function allowedParams() { - return array( array(), array() ); - } - - /** - * Get a list of storage paths read from for this operation - * - * @return Array - */ - public function storagePathsRead() { - return array(); - } - - /** - * Get a list of storage paths written to for this operation - * - * @return Array - */ - public function storagePathsChanged() { - return array(); - } - - /** - * @return Status - */ - protected function doPrecheck( array &$predicates ) { - return Status::newGood(); - } - - /** - * @return Status - */ - protected function doAttempt() { - return Status::newGood(); - } - - /** - * Check for errors with regards to the destination file already existing. - * This also updates the destSameAsSource and sourceSha1 member variables. - * A bad status will be returned if there is no chance it can be overwritten. - * - * @param $predicates Array - * @return Status - */ - protected function precheckDestExistence( array $predicates ) { - $status = Status::newGood(); - // Get hash of source file/string and the destination file - $this->sourceSha1 = $this->getSourceSha1Base36(); // FS file or data string - if ( $this->sourceSha1 === null ) { // file in storage? - $this->sourceSha1 = $this->fileSha1( $this->params['src'], $predicates ); - } - $this->destSameAsSource = false; - if ( $this->fileExists( $this->params['dst'], $predicates ) ) { - if ( $this->getParam( 'overwrite' ) ) { - return $status; // OK - } elseif ( $this->getParam( 'overwriteSame' ) ) { - $dhash = $this->fileSha1( $this->params['dst'], $predicates ); - // Check if hashes are valid and match each other... - if ( !strlen( $this->sourceSha1 ) || !strlen( $dhash ) ) { - $status->fatal( 'backend-fail-hashes' ); - } elseif ( $this->sourceSha1 !== $dhash ) { - // Give an error if the files are not identical - $status->fatal( 'backend-fail-notsame', $this->params['dst'] ); - } else { - $this->destSameAsSource = true; // OK - } - return $status; // do nothing; either OK or bad status - } else { - $status->fatal( 'backend-fail-alreadyexists', $this->params['dst'] ); - return $status; - } - } - return $status; - } - - /** - * precheckDestExistence() helper function to get the source file SHA-1. - * Subclasses should overwride this iff the source is not in storage. - * - * @return string|false Returns false on failure - */ - protected function getSourceSha1Base36() { - return null; // N/A - } - - /** - * Check if a file will exist in storage when this operation is attempted - * - * @param $source string Storage path - * @param $predicates Array - * @return bool - */ - final protected function fileExists( $source, array $predicates ) { - if ( isset( $predicates['exists'][$source] ) ) { - return $predicates['exists'][$source]; // previous op assures this - } else { - $params = array( 'src' => $source, 'latest' => $this->useLatest ); - return $this->backend->fileExists( $params ); - } - } - - /** - * Get the SHA-1 of a file in storage when this operation is attempted - * - * @param $source string Storage path - * @param $predicates Array - * @return string|false - */ - final protected function fileSha1( $source, array $predicates ) { - if ( isset( $predicates['sha1'][$source] ) ) { - return $predicates['sha1'][$source]; // previous op assures this - } else { - $params = array( 'src' => $source, 'latest' => $this->useLatest ); - return $this->backend->getFileSha1Base36( $params ); - } - } - - /** - * Log a file operation failure and preserve any temp files - * - * @param $action string - * @return void - */ - final protected function logFailure( $action ) { - $params = $this->params; - $params['failedAction'] = $action; - try { - wfDebugLog( 'FileOperation', - get_class( $this ) . ' failed:' . serialize( $params ) ); - } catch ( Exception $e ) { - // bad config? debug log error? - } - } -} - -/** - * FileOp helper class to expand PHP execution time for a function. - * On construction, set_time_limit() is called and set to $seconds. - * When the object goes out of scope, the timer is restarted, with - * the original time limit minus the time the object existed. - */ -class FileOpScopedPHPTimeout { - protected $startTime; // float; seconds - protected $oldTimeout; // integer; seconds - - protected static $stackDepth = 0; // integer - protected static $totalCalls = 0; // integer - protected static $totalElapsed = 0; // float; seconds - - /* Prevent callers in infinite loops from running forever */ - const MAX_TOTAL_CALLS = 1000000; - const MAX_TOTAL_TIME = 300; // seconds - - /** - * @param $seconds integer - */ - public function __construct( $seconds ) { - if ( ini_get( 'max_execution_time' ) > 0 ) { // CLI uses 0 - if ( self::$totalCalls >= self::MAX_TOTAL_CALLS ) { - trigger_error( "Maximum invocations of " . __CLASS__ . " exceeded." ); - } elseif ( self::$totalElapsed >= self::MAX_TOTAL_TIME ) { - trigger_error( "Time limit within invocations of " . __CLASS__ . " exceeded." ); - } elseif ( self::$stackDepth > 0 ) { // recursion guard - trigger_error( "Resursive invocation of " . __CLASS__ . " attempted." ); - } else { - $this->oldTimeout = ini_set( 'max_execution_time', $seconds ); - $this->startTime = microtime( true ); - ++self::$stackDepth; - ++self::$totalCalls; // proof against < 1us scopes - } - } - } - - /** - * Restore the original timeout. - * This does not account for the timer value on __construct(). - */ - public function __destruct() { - if ( $this->oldTimeout ) { - $elapsed = microtime( true ) - $this->startTime; - // Note: a limit of 0 is treated as "forever" - set_time_limit( max( 1, $this->oldTimeout - (int)$elapsed ) ); - // If each scoped timeout is for less than one second, we end up - // restoring the original timeout without any decrease in value. - // Thus web scripts in an infinite loop can run forever unless we - // take some measures to prevent this. Track total time and calls. - self::$totalElapsed += $elapsed; - --self::$stackDepth; - } - } -} - -/** - * Store a file into the backend from a file on the file system. - * Parameters similar to FileBackendStore::storeInternal(), which include: - * src : source path on file system - * dst : destination storage path - * overwrite : do nothing and pass if an identical file exists at destination - * overwriteSame : override any existing file at destination - */ -class StoreFileOp extends FileOp { - protected function allowedParams() { - return array( array( 'src', 'dst' ), array( 'overwrite', 'overwriteSame' ) ); - } - - protected function doPrecheck( array &$predicates ) { - $status = Status::newGood(); - // Check if the source file exists on the file system - if ( !is_file( $this->params['src'] ) ) { - $status->fatal( 'backend-fail-notexists', $this->params['src'] ); - return $status; - // Check if the source file is too big - } elseif ( filesize( $this->params['src'] ) > $this->backend->maxFileSizeInternal() ) { - $status->fatal( 'backend-fail-store', $this->params['src'], $this->params['dst'] ); - return $status; - // Check if a file can be placed at the destination - } elseif ( !$this->backend->isPathUsableInternal( $this->params['dst'] ) ) { - $status->fatal( 'backend-fail-store', $this->params['src'], $this->params['dst'] ); - return $status; - } - // Check if destination file exists - $status->merge( $this->precheckDestExistence( $predicates ) ); - if ( $status->isOK() ) { - // Update file existence predicates - $predicates['exists'][$this->params['dst']] = true; - $predicates['sha1'][$this->params['dst']] = $this->sourceSha1; - } - return $status; // safe to call attempt() - } - - protected function doAttempt() { - $status = Status::newGood(); - // Store the file at the destination - if ( !$this->destSameAsSource ) { - $status->merge( $this->backend->storeInternal( $this->params ) ); - } - return $status; - } - - protected function getSourceSha1Base36() { - wfSuppressWarnings(); - $hash = sha1_file( $this->params['src'] ); - wfRestoreWarnings(); - if ( $hash !== false ) { - $hash = wfBaseConvert( $hash, 16, 36, 31 ); - } - return $hash; - } - - public function storagePathsChanged() { - return array( $this->params['dst'] ); - } -} - -/** - * Create a file in the backend with the given content. - * Parameters similar to FileBackendStore::createInternal(), which include: - * content : the raw file contents - * dst : destination storage path - * overwrite : do nothing and pass if an identical file exists at destination - * overwriteSame : override any existing file at destination - */ -class CreateFileOp extends FileOp { - protected function allowedParams() { - return array( array( 'content', 'dst' ), array( 'overwrite', 'overwriteSame' ) ); - } - - protected function doPrecheck( array &$predicates ) { - $status = Status::newGood(); - // Check if the source data is too big - if ( strlen( $this->getParam( 'content' ) ) > $this->backend->maxFileSizeInternal() ) { - $status->fatal( 'backend-fail-create', $this->params['dst'] ); - return $status; - // Check if a file can be placed at the destination - } elseif ( !$this->backend->isPathUsableInternal( $this->params['dst'] ) ) { - $status->fatal( 'backend-fail-create', $this->params['dst'] ); - return $status; - } - // Check if destination file exists - $status->merge( $this->precheckDestExistence( $predicates ) ); - if ( $status->isOK() ) { - // Update file existence predicates - $predicates['exists'][$this->params['dst']] = true; - $predicates['sha1'][$this->params['dst']] = $this->sourceSha1; - } - return $status; // safe to call attempt() - } - - protected function doAttempt() { - $status = Status::newGood(); - // Create the file at the destination - if ( !$this->destSameAsSource ) { - $status->merge( $this->backend->createInternal( $this->params ) ); - } - return $status; - } - - protected function getSourceSha1Base36() { - return wfBaseConvert( sha1( $this->params['content'] ), 16, 36, 31 ); - } - - public function storagePathsChanged() { - return array( $this->params['dst'] ); - } -} - -/** - * Copy a file from one storage path to another in the backend. - * Parameters similar to FileBackendStore::copyInternal(), which include: - * src : source storage path - * dst : destination storage path - * overwrite : do nothing and pass if an identical file exists at destination - * overwriteSame : override any existing file at destination - */ -class CopyFileOp extends FileOp { - protected function allowedParams() { - return array( array( 'src', 'dst' ), array( 'overwrite', 'overwriteSame' ) ); - } - - protected function doPrecheck( array &$predicates ) { - $status = Status::newGood(); - // Check if the source file exists - if ( !$this->fileExists( $this->params['src'], $predicates ) ) { - $status->fatal( 'backend-fail-notexists', $this->params['src'] ); - return $status; - // Check if a file can be placed at the destination - } elseif ( !$this->backend->isPathUsableInternal( $this->params['dst'] ) ) { - $status->fatal( 'backend-fail-copy', $this->params['src'], $this->params['dst'] ); - return $status; - } - // Check if destination file exists - $status->merge( $this->precheckDestExistence( $predicates ) ); - if ( $status->isOK() ) { - // Update file existence predicates - $predicates['exists'][$this->params['dst']] = true; - $predicates['sha1'][$this->params['dst']] = $this->sourceSha1; - } - return $status; // safe to call attempt() - } - - protected function doAttempt() { - $status = Status::newGood(); - // Do nothing if the src/dst paths are the same - if ( $this->params['src'] !== $this->params['dst'] ) { - // Copy the file into the destination - if ( !$this->destSameAsSource ) { - $status->merge( $this->backend->copyInternal( $this->params ) ); - } - } - return $status; - } - - public function storagePathsRead() { - return array( $this->params['src'] ); - } - - public function storagePathsChanged() { - return array( $this->params['dst'] ); - } -} - -/** - * Move a file from one storage path to another in the backend. - * Parameters similar to FileBackendStore::moveInternal(), which include: - * src : source storage path - * dst : destination storage path - * overwrite : do nothing and pass if an identical file exists at destination - * overwriteSame : override any existing file at destination - */ -class MoveFileOp extends FileOp { - protected function allowedParams() { - return array( array( 'src', 'dst' ), array( 'overwrite', 'overwriteSame' ) ); - } - - protected function doPrecheck( array &$predicates ) { - $status = Status::newGood(); - // Check if the source file exists - if ( !$this->fileExists( $this->params['src'], $predicates ) ) { - $status->fatal( 'backend-fail-notexists', $this->params['src'] ); - return $status; - // Check if a file can be placed at the destination - } elseif ( !$this->backend->isPathUsableInternal( $this->params['dst'] ) ) { - $status->fatal( 'backend-fail-move', $this->params['src'], $this->params['dst'] ); - return $status; - } - // Check if destination file exists - $status->merge( $this->precheckDestExistence( $predicates ) ); - if ( $status->isOK() ) { - // Update file existence predicates - $predicates['exists'][$this->params['src']] = false; - $predicates['sha1'][$this->params['src']] = false; - $predicates['exists'][$this->params['dst']] = true; - $predicates['sha1'][$this->params['dst']] = $this->sourceSha1; - } - return $status; // safe to call attempt() - } - - protected function doAttempt() { - $status = Status::newGood(); - // Do nothing if the src/dst paths are the same - if ( $this->params['src'] !== $this->params['dst'] ) { - if ( !$this->destSameAsSource ) { - // Move the file into the destination - $status->merge( $this->backend->moveInternal( $this->params ) ); - } else { - // Just delete source as the destination needs no changes - $params = array( 'src' => $this->params['src'] ); - $status->merge( $this->backend->deleteInternal( $params ) ); - } - } - return $status; - } - - public function storagePathsRead() { - return array( $this->params['src'] ); - } - - public function storagePathsChanged() { - return array( $this->params['dst'] ); - } -} - -/** - * Delete a file at the given storage path from the backend. - * Parameters similar to FileBackendStore::deleteInternal(), which include: - * src : source storage path - * ignoreMissingSource : don't return an error if the file does not exist - */ -class DeleteFileOp extends FileOp { - protected function allowedParams() { - return array( array( 'src' ), array( 'ignoreMissingSource' ) ); - } - - protected $needsDelete = true; - - protected function doPrecheck( array &$predicates ) { - $status = Status::newGood(); - // Check if the source file exists - if ( !$this->fileExists( $this->params['src'], $predicates ) ) { - if ( !$this->getParam( 'ignoreMissingSource' ) ) { - $status->fatal( 'backend-fail-notexists', $this->params['src'] ); - return $status; - } - $this->needsDelete = false; - } - // Update file existence predicates - $predicates['exists'][$this->params['src']] = false; - $predicates['sha1'][$this->params['src']] = false; - return $status; // safe to call attempt() - } - - protected function doAttempt() { - $status = Status::newGood(); - if ( $this->needsDelete ) { - // Delete the source file - $status->merge( $this->backend->deleteInternal( $this->params ) ); - } - return $status; - } - - public function storagePathsChanged() { - return array( $this->params['src'] ); - } -} - -/** - * Placeholder operation that has no params and does nothing - */ -class NullFileOp extends FileOp {} diff --git a/includes/filerepo/backend/SwiftFileBackend.php b/includes/filerepo/backend/SwiftFileBackend.php deleted file mode 100644 index a287f488..00000000 --- a/includes/filerepo/backend/SwiftFileBackend.php +++ /dev/null @@ -1,877 +0,0 @@ -<?php -/** - * @file - * @ingroup FileBackend - * @author Russ Nelson - * @author Aaron Schulz - */ - -/** - * Class for an OpenStack Swift based file backend. - * - * This requires the SwiftCloudFiles MediaWiki extension, which includes - * the php-cloudfiles library (https://github.com/rackspace/php-cloudfiles). - * php-cloudfiles requires the curl, fileinfo, and mb_string PHP extensions. - * - * Status messages should avoid mentioning the Swift account name. - * Likewise, error suppression should be used to avoid path disclosure. - * - * @ingroup FileBackend - * @since 1.19 - */ -class SwiftFileBackend extends FileBackendStore { - /** @var CF_Authentication */ - protected $auth; // Swift authentication handler - protected $authTTL; // integer seconds - protected $swiftAnonUser; // string; username to handle unauthenticated requests - protected $maxContCacheSize = 100; // integer; max containers with entries - - /** @var CF_Connection */ - protected $conn; // Swift connection handle - protected $connStarted = 0; // integer UNIX timestamp - protected $connContainers = array(); // container object cache - - /** - * @see FileBackendStore::__construct() - * Additional $config params include: - * swiftAuthUrl : Swift authentication server URL - * swiftUser : Swift user used by MediaWiki (account:username) - * swiftKey : Swift authentication key for the above user - * swiftAuthTTL : Swift authentication TTL (seconds) - * swiftAnonUser : Swift user used for end-user requests (account:username) - * shardViaHashLevels : Map of container names to sharding config with: - * 'base' : base of hash characters, 16 or 36 - * 'levels' : the number of hash levels (and digits) - * 'repeat' : hash subdirectories are prefixed with all the - * parent hash directory names (e.g. "a/ab/abc") - */ - public function __construct( array $config ) { - parent::__construct( $config ); - // Required settings - $this->auth = new CF_Authentication( - $config['swiftUser'], - $config['swiftKey'], - null, // account; unused - $config['swiftAuthUrl'] - ); - // Optional settings - $this->authTTL = isset( $config['swiftAuthTTL'] ) - ? $config['swiftAuthTTL'] - : 120; // some sane number - $this->swiftAnonUser = isset( $config['swiftAnonUser'] ) - ? $config['swiftAnonUser'] - : ''; - $this->shardViaHashLevels = isset( $config['shardViaHashLevels'] ) - ? $config['shardViaHashLevels'] - : ''; - } - - /** - * @see FileBackendStore::resolveContainerPath() - */ - protected function resolveContainerPath( $container, $relStoragePath ) { - if ( strlen( urlencode( $relStoragePath ) ) > 1024 ) { - return null; // too long for Swift - } - return $relStoragePath; - } - - /** - * @see FileBackendStore::isPathUsableInternal() - */ - public function isPathUsableInternal( $storagePath ) { - list( $container, $rel ) = $this->resolveStoragePathReal( $storagePath ); - if ( $rel === null ) { - return false; // invalid - } - - try { - $this->getContainer( $container ); - return true; // container exists - } catch ( NoSuchContainerException $e ) { - } catch ( InvalidResponseException $e ) { - } catch ( Exception $e ) { // some other exception? - $this->logException( $e, __METHOD__, array( 'path' => $storagePath ) ); - } - - return false; - } - - /** - * @see FileBackendStore::doCreateInternal() - */ - protected function doCreateInternal( array $params ) { - $status = Status::newGood(); - - list( $dstCont, $dstRel ) = $this->resolveStoragePathReal( $params['dst'] ); - if ( $dstRel === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); - return $status; - } - - // (a) Check the destination container and object - try { - $dContObj = $this->getContainer( $dstCont ); - if ( empty( $params['overwrite'] ) && - $this->fileExists( array( 'src' => $params['dst'], 'latest' => 1 ) ) ) - { - $status->fatal( 'backend-fail-alreadyexists', $params['dst'] ); - return $status; - } - } catch ( NoSuchContainerException $e ) { - $status->fatal( 'backend-fail-create', $params['dst'] ); - return $status; - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - return $status; - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - return $status; - } - - // (b) Get a SHA-1 hash of the object - $sha1Hash = wfBaseConvert( sha1( $params['content'] ), 16, 36, 31 ); - - // (c) Actually create the object - try { - // Create a fresh CF_Object with no fields preloaded. - // We don't want to preserve headers, metadata, and such. - $obj = new CF_Object( $dContObj, $dstRel, false, false ); // skip HEAD - // Note: metadata keys stored as [Upper case char][[Lower case char]...] - $obj->metadata = array( 'Sha1base36' => $sha1Hash ); - // Manually set the ETag (https://github.com/rackspace/php-cloudfiles/issues/59). - // The MD5 here will be checked within Swift against its own MD5. - $obj->set_etag( md5( $params['content'] ) ); - // Use the same content type as StreamFile for security - $obj->content_type = StreamFile::contentTypeFromPath( $params['dst'] ); - // Actually write the object in Swift - $obj->write( $params['content'] ); - } catch ( BadContentTypeException $e ) { - $status->fatal( 'backend-fail-contenttype', $params['dst'] ); - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - } - - return $status; - } - - /** - * @see FileBackendStore::doStoreInternal() - */ - protected function doStoreInternal( array $params ) { - $status = Status::newGood(); - - list( $dstCont, $dstRel ) = $this->resolveStoragePathReal( $params['dst'] ); - if ( $dstRel === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); - return $status; - } - - // (a) Check the destination container and object - try { - $dContObj = $this->getContainer( $dstCont ); - if ( empty( $params['overwrite'] ) && - $this->fileExists( array( 'src' => $params['dst'], 'latest' => 1 ) ) ) - { - $status->fatal( 'backend-fail-alreadyexists', $params['dst'] ); - return $status; - } - } catch ( NoSuchContainerException $e ) { - $status->fatal( 'backend-fail-copy', $params['src'], $params['dst'] ); - return $status; - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - return $status; - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - return $status; - } - - // (b) Get a SHA-1 hash of the object - $sha1Hash = sha1_file( $params['src'] ); - if ( $sha1Hash === false ) { // source doesn't exist? - $status->fatal( 'backend-fail-copy', $params['src'], $params['dst'] ); - return $status; - } - $sha1Hash = wfBaseConvert( $sha1Hash, 16, 36, 31 ); - - // (c) Actually store the object - try { - // Create a fresh CF_Object with no fields preloaded. - // We don't want to preserve headers, metadata, and such. - $obj = new CF_Object( $dContObj, $dstRel, false, false ); // skip HEAD - // Note: metadata keys stored as [Upper case char][[Lower case char]...] - $obj->metadata = array( 'Sha1base36' => $sha1Hash ); - // The MD5 here will be checked within Swift against its own MD5. - $obj->set_etag( md5_file( $params['src'] ) ); - // Use the same content type as StreamFile for security - $obj->content_type = StreamFile::contentTypeFromPath( $params['dst'] ); - // Actually write the object in Swift - $obj->load_from_filename( $params['src'], True ); // calls $obj->write() - } catch ( BadContentTypeException $e ) { - $status->fatal( 'backend-fail-contenttype', $params['dst'] ); - } catch ( IOException $e ) { - $status->fatal( 'backend-fail-copy', $params['src'], $params['dst'] ); - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - } - - return $status; - } - - /** - * @see FileBackendStore::doCopyInternal() - */ - protected function doCopyInternal( array $params ) { - $status = Status::newGood(); - - list( $srcCont, $srcRel ) = $this->resolveStoragePathReal( $params['src'] ); - if ( $srcRel === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['src'] ); - return $status; - } - - list( $dstCont, $dstRel ) = $this->resolveStoragePathReal( $params['dst'] ); - if ( $dstRel === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['dst'] ); - return $status; - } - - // (a) Check the source/destination containers and destination object - try { - $sContObj = $this->getContainer( $srcCont ); - $dContObj = $this->getContainer( $dstCont ); - if ( empty( $params['overwrite'] ) && - $this->fileExists( array( 'src' => $params['dst'], 'latest' => 1 ) ) ) - { - $status->fatal( 'backend-fail-alreadyexists', $params['dst'] ); - return $status; - } - } catch ( NoSuchContainerException $e ) { - $status->fatal( 'backend-fail-copy', $params['src'], $params['dst'] ); - return $status; - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - return $status; - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - return $status; - } - - // (b) Actually copy the file to the destination - try { - $sContObj->copy_object_to( $srcRel, $dContObj, $dstRel ); - } catch ( NoSuchObjectException $e ) { // source object does not exist - $status->fatal( 'backend-fail-copy', $params['src'], $params['dst'] ); - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - } - - return $status; - } - - /** - * @see FileBackendStore::doDeleteInternal() - */ - protected function doDeleteInternal( array $params ) { - $status = Status::newGood(); - - list( $srcCont, $srcRel ) = $this->resolveStoragePathReal( $params['src'] ); - if ( $srcRel === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['src'] ); - return $status; - } - - try { - $sContObj = $this->getContainer( $srcCont ); - $sContObj->delete_object( $srcRel ); - } catch ( NoSuchContainerException $e ) { - $status->fatal( 'backend-fail-delete', $params['src'] ); - } catch ( NoSuchObjectException $e ) { - if ( empty( $params['ignoreMissingSource'] ) ) { - $status->fatal( 'backend-fail-delete', $params['src'] ); - } - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - } - - return $status; - } - - /** - * @see FileBackendStore::doPrepareInternal() - */ - protected function doPrepareInternal( $fullCont, $dir, array $params ) { - $status = Status::newGood(); - - // (a) Check if container already exists - try { - $contObj = $this->getContainer( $fullCont ); - // NoSuchContainerException not thrown: container must exist - return $status; // already exists - } catch ( NoSuchContainerException $e ) { - // NoSuchContainerException thrown: container does not exist - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - return $status; - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - return $status; - } - - // (b) Create container as needed - try { - $contObj = $this->createContainer( $fullCont ); - if ( $this->swiftAnonUser != '' ) { - // Make container public to end-users... - $status->merge( $this->setContainerAccess( - $contObj, - array( $this->auth->username, $this->swiftAnonUser ), // read - array( $this->auth->username ) // write - ) ); - } - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - return $status; - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - return $status; - } - - return $status; - } - - /** - * @see FileBackendStore::doSecureInternal() - */ - protected function doSecureInternal( $fullCont, $dir, array $params ) { - $status = Status::newGood(); - - if ( $this->swiftAnonUser != '' ) { - // Restrict container from end-users... - try { - // doPrepareInternal() should have been called, - // so the Swift container should already exist... - $contObj = $this->getContainer( $fullCont ); // normally a cache hit - // NoSuchContainerException not thrown: container must exist - if ( !isset( $contObj->mw_wasSecured ) ) { - $status->merge( $this->setContainerAccess( - $contObj, - array( $this->auth->username ), // read - array( $this->auth->username ) // write - ) ); - // @TODO: when php-cloudfiles supports container - // metadata, we can make use of that to avoid RTTs - $contObj->mw_wasSecured = true; // avoid useless RTTs - } - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - } - } - - return $status; - } - - /** - * @see FileBackendStore::doCleanInternal() - */ - protected function doCleanInternal( $fullCont, $dir, array $params ) { - $status = Status::newGood(); - - // Only containers themselves can be removed, all else is virtual - if ( $dir != '' ) { - return $status; // nothing to do - } - - // (a) Check the container - try { - $contObj = $this->getContainer( $fullCont, true ); - } catch ( NoSuchContainerException $e ) { - return $status; // ok, nothing to do - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - return $status; - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - return $status; - } - - // (b) Delete the container if empty - if ( $contObj->object_count == 0 ) { - try { - $this->deleteContainer( $fullCont ); - } catch ( NoSuchContainerException $e ) { - return $status; // race? - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - return $status; - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-internal', $this->name ); - $this->logException( $e, __METHOD__, $params ); - return $status; - } - } - - return $status; - } - - /** - * @see FileBackendStore::doFileExists() - */ - protected function doGetFileStat( array $params ) { - list( $srcCont, $srcRel ) = $this->resolveStoragePathReal( $params['src'] ); - if ( $srcRel === null ) { - return false; // invalid storage path - } - - $stat = false; - try { - $contObj = $this->getContainer( $srcCont ); - $srcObj = $contObj->get_object( $srcRel, $this->headersFromParams( $params ) ); - $this->addMissingMetadata( $srcObj, $params['src'] ); - $stat = array( - // Convert dates like "Tue, 03 Jan 2012 22:01:04 GMT" to TS_MW - 'mtime' => wfTimestamp( TS_MW, $srcObj->last_modified ), - 'size' => $srcObj->content_length, - 'sha1' => $srcObj->metadata['Sha1base36'] - ); - } catch ( NoSuchContainerException $e ) { - } catch ( NoSuchObjectException $e ) { - } catch ( InvalidResponseException $e ) { - $stat = null; - } catch ( Exception $e ) { // some other exception? - $stat = null; - $this->logException( $e, __METHOD__, $params ); - } - - return $stat; - } - - /** - * Fill in any missing object metadata and save it to Swift - * - * @param $obj CF_Object - * @param $path string Storage path to object - * @return bool Success - * @throws Exception cloudfiles exceptions - */ - protected function addMissingMetadata( CF_Object $obj, $path ) { - if ( isset( $obj->metadata['Sha1base36'] ) ) { - return true; // nothing to do - } - $status = Status::newGood(); - $scopeLockS = $this->getScopedFileLocks( array( $path ), LockManager::LOCK_UW, $status ); - if ( $status->isOK() ) { - $tmpFile = $this->getLocalCopy( array( 'src' => $path, 'latest' => 1 ) ); - if ( $tmpFile ) { - $hash = $tmpFile->getSha1Base36(); - if ( $hash !== false ) { - $obj->metadata['Sha1base36'] = $hash; - $obj->sync_metadata(); // save to Swift - return true; // success - } - } - } - $obj->metadata['Sha1base36'] = false; - return false; // failed - } - - /** - * @see FileBackend::getFileContents() - */ - public function getFileContents( array $params ) { - list( $srcCont, $srcRel ) = $this->resolveStoragePathReal( $params['src'] ); - if ( $srcRel === null ) { - return false; // invalid storage path - } - - if ( !$this->fileExists( $params ) ) { - return null; - } - - $data = false; - try { - $sContObj = $this->getContainer( $srcCont ); - $obj = new CF_Object( $sContObj, $srcRel, false, false ); // skip HEAD request - $data = $obj->read( $this->headersFromParams( $params ) ); - } catch ( NoSuchContainerException $e ) { - } catch ( InvalidResponseException $e ) { - } catch ( Exception $e ) { // some other exception? - $this->logException( $e, __METHOD__, $params ); - } - - return $data; - } - - /** - * @see FileBackendStore::getFileListInternal() - */ - public function getFileListInternal( $fullCont, $dir, array $params ) { - return new SwiftFileBackendFileList( $this, $fullCont, $dir ); - } - - /** - * Do not call this function outside of SwiftFileBackendFileList - * - * @param $fullCont string Resolved container name - * @param $dir string Resolved storage directory with no trailing slash - * @param $after string Storage path of file to list items after - * @param $limit integer Max number of items to list - * @return Array - */ - public function getFileListPageInternal( $fullCont, $dir, $after, $limit ) { - $files = array(); - - try { - $container = $this->getContainer( $fullCont ); - $prefix = ( $dir == '' ) ? null : "{$dir}/"; - $files = $container->list_objects( $limit, $after, $prefix ); - } catch ( NoSuchContainerException $e ) { - } catch ( NoSuchObjectException $e ) { - } catch ( InvalidResponseException $e ) { - } catch ( Exception $e ) { // some other exception? - $this->logException( $e, __METHOD__, array( 'cont' => $fullCont, 'dir' => $dir ) ); - } - - return $files; - } - - /** - * @see FileBackendStore::doGetFileSha1base36() - */ - public function doGetFileSha1base36( array $params ) { - $stat = $this->getFileStat( $params ); - if ( $stat ) { - return $stat['sha1']; - } else { - return false; - } - } - - /** - * @see FileBackendStore::doStreamFile() - */ - protected function doStreamFile( array $params ) { - $status = Status::newGood(); - - list( $srcCont, $srcRel ) = $this->resolveStoragePathReal( $params['src'] ); - if ( $srcRel === null ) { - $status->fatal( 'backend-fail-invalidpath', $params['src'] ); - } - - try { - $cont = $this->getContainer( $srcCont ); - } catch ( NoSuchContainerException $e ) { - $status->fatal( 'backend-fail-stream', $params['src'] ); - return $status; - } catch ( InvalidResponseException $e ) { - $status->fatal( 'backend-fail-connect', $this->name ); - return $status; - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-stream', $params['src'] ); - $this->logException( $e, __METHOD__, $params ); - return $status; - } - - try { - $output = fopen( 'php://output', 'wb' ); - $obj = new CF_Object( $cont, $srcRel, false, false ); // skip HEAD request - $obj->stream( $output, $this->headersFromParams( $params ) ); - } catch ( InvalidResponseException $e ) { // 404? connection problem? - $status->fatal( 'backend-fail-stream', $params['src'] ); - } catch ( Exception $e ) { // some other exception? - $status->fatal( 'backend-fail-stream', $params['src'] ); - $this->logException( $e, __METHOD__, $params ); - } - - return $status; - } - - /** - * @see FileBackendStore::getLocalCopy() - */ - public function getLocalCopy( array $params ) { - list( $srcCont, $srcRel ) = $this->resolveStoragePathReal( $params['src'] ); - if ( $srcRel === null ) { - return null; - } - - if ( !$this->fileExists( $params ) ) { - return null; - } - - $tmpFile = null; - try { - $sContObj = $this->getContainer( $srcCont ); - $obj = new CF_Object( $sContObj, $srcRel, false, false ); // skip HEAD - // Get source file extension - $ext = FileBackend::extensionFromPath( $srcRel ); - // Create a new temporary file... - $tmpFile = TempFSFile::factory( wfBaseName( $srcRel ) . '_', $ext ); - if ( $tmpFile ) { - $handle = fopen( $tmpFile->getPath(), 'wb' ); - if ( $handle ) { - $obj->stream( $handle, $this->headersFromParams( $params ) ); - fclose( $handle ); - } else { - $tmpFile = null; // couldn't open temp file - } - } - } catch ( NoSuchContainerException $e ) { - $tmpFile = null; - } catch ( InvalidResponseException $e ) { - $tmpFile = null; - } catch ( Exception $e ) { // some other exception? - $tmpFile = null; - $this->logException( $e, __METHOD__, $params ); - } - - return $tmpFile; - } - - /** - * Get headers to send to Swift when reading a file based - * on a FileBackend params array, e.g. that of getLocalCopy(). - * $params is currently only checked for a 'latest' flag. - * - * @param $params Array - * @return Array - */ - protected function headersFromParams( array $params ) { - $hdrs = array(); - if ( !empty( $params['latest'] ) ) { - $hdrs[] = 'X-Newest: true'; - } - return $hdrs; - } - - /** - * Set read/write permissions for a Swift container - * - * @param $contObj CF_Container Swift container - * @param $readGrps Array Swift users who can read (account:user) - * @param $writeGrps Array Swift users who can write (account:user) - * @return Status - */ - protected function setContainerAccess( - CF_Container $contObj, array $readGrps, array $writeGrps - ) { - $creds = $contObj->cfs_auth->export_credentials(); - - $url = $creds['storage_url'] . '/' . rawurlencode( $contObj->name ); - - // Note: 10 second timeout consistent with php-cloudfiles - $req = new CurlHttpRequest( $url, array( 'method' => 'POST', 'timeout' => 10 ) ); - $req->setHeader( 'X-Auth-Token', $creds['auth_token'] ); - $req->setHeader( 'X-Container-Read', implode( ',', $readGrps ) ); - $req->setHeader( 'X-Container-Write', implode( ',', $writeGrps ) ); - - return $req->execute(); // should return 204 - } - - /** - * Get a connection to the Swift proxy - * - * @return CF_Connection|false - * @throws InvalidResponseException - */ - protected function getConnection() { - if ( $this->conn === false ) { - throw new InvalidResponseException; // failed last attempt - } - // Session keys expire after a while, so we renew them periodically - if ( $this->conn && ( time() - $this->connStarted ) > $this->authTTL ) { - $this->conn->close(); // close active cURL connections - $this->conn = null; - } - // Authenticate with proxy and get a session key... - if ( $this->conn === null ) { - $this->connContainers = array(); - try { - $this->auth->authenticate(); - $this->conn = new CF_Connection( $this->auth ); - $this->connStarted = time(); - } catch ( AuthenticationException $e ) { - $this->conn = false; // don't keep re-trying - } catch ( InvalidResponseException $e ) { - $this->conn = false; // don't keep re-trying - } - } - if ( !$this->conn ) { - throw new InvalidResponseException; // auth/connection problem - } - return $this->conn; - } - - /** - * @see FileBackendStore::doClearCache() - */ - protected function doClearCache( array $paths = null ) { - $this->connContainers = array(); // clear container object cache - } - - /** - * Get a Swift container object, possibly from process cache. - * Use $reCache if the file count or byte count is needed. - * - * @param $container string Container name - * @param $reCache bool Refresh the process cache - * @return CF_Container - */ - protected function getContainer( $container, $reCache = false ) { - $conn = $this->getConnection(); // Swift proxy connection - if ( $reCache ) { - unset( $this->connContainers[$container] ); // purge cache - } - if ( !isset( $this->connContainers[$container] ) ) { - $contObj = $conn->get_container( $container ); - // NoSuchContainerException not thrown: container must exist - if ( count( $this->connContainers ) >= $this->maxContCacheSize ) { // trim cache? - reset( $this->connContainers ); - $key = key( $this->connContainers ); - unset( $this->connContainers[$key] ); - } - $this->connContainers[$container] = $contObj; // cache it - } - return $this->connContainers[$container]; - } - - /** - * Create a Swift container - * - * @param $container string Container name - * @return CF_Container - */ - protected function createContainer( $container ) { - $conn = $this->getConnection(); // Swift proxy connection - $contObj = $conn->create_container( $container ); - $this->connContainers[$container] = $contObj; // cache it - return $contObj; - } - - /** - * Delete a Swift container - * - * @param $container string Container name - * @return void - */ - protected function deleteContainer( $container ) { - $conn = $this->getConnection(); // Swift proxy connection - $conn->delete_container( $container ); - unset( $this->connContainers[$container] ); // purge cache - } - - /** - * Log an unexpected exception for this backend - * - * @param $e Exception - * @param $func string - * @param $params Array - * @return void - */ - protected function logException( Exception $e, $func, array $params ) { - wfDebugLog( 'SwiftBackend', - get_class( $e ) . " in '{$func}' (given '" . serialize( $params ) . "')" . - ( $e instanceof InvalidResponseException - ? ": {$e->getMessage()}" - : "" - ) - ); - } -} - -/** - * SwiftFileBackend helper class to page through object listings. - * Swift also has a listing limit of 10,000 objects for sanity. - * Do not use this class from places outside SwiftFileBackend. - * - * @ingroup FileBackend - */ -class SwiftFileBackendFileList implements Iterator { - /** @var Array */ - protected $bufferIter = array(); - protected $bufferAfter = null; // string; list items *after* this path - protected $pos = 0; // integer - - /** @var SwiftFileBackend */ - protected $backend; - protected $container; // - protected $dir; // string storage directory - protected $suffixStart; // integer - - const PAGE_SIZE = 5000; // file listing buffer size - - /** - * @param $backend SwiftFileBackend - * @param $fullCont string Resolved container name - * @param $dir string Resolved directory relative to container - */ - public function __construct( SwiftFileBackend $backend, $fullCont, $dir ) { - $this->backend = $backend; - $this->container = $fullCont; - $this->dir = $dir; - if ( substr( $this->dir, -1 ) === '/' ) { - $this->dir = substr( $this->dir, 0, -1 ); // remove trailing slash - } - if ( $this->dir == '' ) { // whole container - $this->suffixStart = 0; - } else { // dir within container - $this->suffixStart = strlen( $this->dir ) + 1; // size of "path/to/dir/" - } - } - - public function current() { - return substr( current( $this->bufferIter ), $this->suffixStart ); - } - - public function key() { - return $this->pos; - } - - public function next() { - // Advance to the next file in the page - next( $this->bufferIter ); - ++$this->pos; - // Check if there are no files left in this page and - // advance to the next page if this page was not empty. - if ( !$this->valid() && count( $this->bufferIter ) ) { - $this->bufferAfter = end( $this->bufferIter ); - $this->bufferIter = $this->backend->getFileListPageInternal( - $this->container, $this->dir, $this->bufferAfter, self::PAGE_SIZE - ); - } - } - - public function rewind() { - $this->pos = 0; - $this->bufferAfter = null; - $this->bufferIter = $this->backend->getFileListPageInternal( - $this->container, $this->dir, $this->bufferAfter, self::PAGE_SIZE - ); - } - - public function valid() { - return ( current( $this->bufferIter ) !== false ); // no paths can have this value - } -} diff --git a/includes/filerepo/backend/TempFSFile.php b/includes/filerepo/backend/TempFSFile.php deleted file mode 100644 index 7843d6cd..00000000 --- a/includes/filerepo/backend/TempFSFile.php +++ /dev/null @@ -1,92 +0,0 @@ -<?php -/** - * @file - * @ingroup FileBackend - */ - -/** - * This class is used to hold the location and do limited manipulation - * of files stored temporarily (usually this will be $wgTmpDirectory) - * - * @ingroup FileBackend - */ -class TempFSFile extends FSFile { - protected $canDelete = false; // bool; garbage collect the temp file - - /** @var Array of active temp files to purge on shutdown */ - protected static $instances = array(); - - /** - * Make a new temporary file on the file system. - * Temporary files may be purged when the file object falls out of scope. - * - * @param $prefix string - * @param $extension string - * @return TempFSFile|null - */ - public static function factory( $prefix, $extension = '' ) { - $base = wfTempDir() . '/' . $prefix . dechex( mt_rand( 0, 99999999 ) ); - $ext = ( $extension != '' ) ? ".{$extension}" : ""; - for ( $attempt = 1; true; $attempt++ ) { - $path = "{$base}-{$attempt}{$ext}"; - wfSuppressWarnings(); - $newFileHandle = fopen( $path, 'x' ); - wfRestoreWarnings(); - if ( $newFileHandle ) { - fclose( $newFileHandle ); - break; // got it - } - if ( $attempt >= 15 ) { - return null; // give up - } - } - $tmpFile = new self( $path ); - $tmpFile->canDelete = true; // safely instantiated - return $tmpFile; - } - - /** - * Purge this file off the file system - * - * @return bool Success - */ - public function purge() { - $this->canDelete = false; // done - wfSuppressWarnings(); - $ok = unlink( $this->path ); - wfRestoreWarnings(); - return $ok; - } - - /** - * Clean up the temporary file only after an object goes out of scope - * - * @param $object Object - * @return void - */ - public function bind( $object ) { - if ( is_object( $object ) ) { - $object->tempFSFileReferences[] = $this; - } - } - - /** - * Set flag to not clean up after the temporary file - * - * @return void - */ - public function preserve() { - $this->canDelete = false; - } - - /** - * Cleans up after the temporary file by deleting it - */ - function __destruct() { - if ( $this->canDelete ) { - wfSuppressWarnings(); - unlink( $this->path ); - wfRestoreWarnings(); - } - } -} diff --git a/includes/filerepo/backend/lockmanager/DBLockManager.php b/includes/filerepo/backend/lockmanager/DBLockManager.php deleted file mode 100644 index 045056ea..00000000 --- a/includes/filerepo/backend/lockmanager/DBLockManager.php +++ /dev/null @@ -1,469 +0,0 @@ -<?php - -/** - * Version of LockManager based on using DB table locks. - * This is meant for multi-wiki systems that may share files. - * All locks are blocking, so it might be useful to set a small - * lock-wait timeout via server config to curtail deadlocks. - * - * All lock requests for a resource, identified by a hash string, will map - * to one bucket. Each bucket maps to one or several peer DBs, each on their - * own server, all having the filelocks.sql tables (with row-level locking). - * A majority of peer DBs must agree for a lock to be acquired. - * - * Caching is used to avoid hitting servers that are down. - * - * @ingroup LockManager - * @since 1.19 - */ -class DBLockManager extends LockManager { - /** @var Array Map of DB names to server config */ - protected $dbServers; // (DB name => server config array) - /** @var Array Map of bucket indexes to peer DB lists */ - protected $dbsByBucket; // (bucket index => (ldb1, ldb2, ...)) - /** @var BagOStuff */ - protected $statusCache; - - protected $lockExpiry; // integer number of seconds - protected $safeDelay; // integer number of seconds - - protected $session = 0; // random integer - /** @var Array Map Database connections (DB name => Database) */ - protected $conns = array(); - - /** - * Construct a new instance from configuration. - * - * $config paramaters include: - * 'dbServers' : Associative array of DB names to server configuration. - * Configuration is an associative array that includes: - * 'host' - DB server name - * 'dbname' - DB name - * 'type' - DB type (mysql,postgres,...) - * 'user' - DB user - * 'password' - DB user password - * 'tablePrefix' - DB table prefix - * 'flags' - DB flags (see DatabaseBase) - * 'dbsByBucket' : Array of 1-16 consecutive integer keys, starting from 0, - * each having an odd-numbered list of DB names (peers) as values. - * Any DB named 'localDBMaster' will automatically use the DB master - * settings for this wiki (without the need for a dbServers entry). - * 'lockExpiry' : Lock timeout (seconds) for dropped connections. [optional] - * This tells the DB server how long to wait before assuming - * connection failure and releasing all the locks for a session. - * - * @param Array $config - */ - public function __construct( array $config ) { - $this->dbServers = isset( $config['dbServers'] ) - ? $config['dbServers'] - : array(); // likely just using 'localDBMaster' - // Sanitize dbsByBucket config to prevent PHP errors - $this->dbsByBucket = array_filter( $config['dbsByBucket'], 'is_array' ); - $this->dbsByBucket = array_values( $this->dbsByBucket ); // consecutive - - if ( isset( $config['lockExpiry'] ) ) { - $this->lockExpiry = $config['lockExpiry']; - } else { - $met = ini_get( 'max_execution_time' ); - $this->lockExpiry = $met ? $met : 60; // use some sane amount if 0 - } - $this->safeDelay = ( $this->lockExpiry <= 0 ) - ? 60 // pick a safe-ish number to match DB timeout default - : $this->lockExpiry; // cover worst case - - foreach ( $this->dbsByBucket as $bucket ) { - if ( count( $bucket ) > 1 ) { - // Tracks peers that couldn't be queried recently to avoid lengthy - // connection timeouts. This is useless if each bucket has one peer. - $this->statusCache = wfGetMainCache(); - break; - } - } - - $this->session = ''; - for ( $i = 0; $i < 5; $i++ ) { - $this->session .= mt_rand( 0, 2147483647 ); - } - $this->session = wfBaseConvert( sha1( $this->session ), 16, 36, 31 ); - } - - /** - * @see LockManager::doLock() - */ - protected function doLock( array $paths, $type ) { - $status = Status::newGood(); - - $pathsToLock = array(); - // Get locks that need to be acquired (buckets => locks)... - foreach ( $paths as $path ) { - if ( isset( $this->locksHeld[$path][$type] ) ) { - ++$this->locksHeld[$path][$type]; - } elseif ( isset( $this->locksHeld[$path][self::LOCK_EX] ) ) { - $this->locksHeld[$path][$type] = 1; - } else { - $bucket = $this->getBucketFromKey( $path ); - $pathsToLock[$bucket][] = $path; - } - } - - $lockedPaths = array(); // files locked in this attempt - // Attempt to acquire these locks... - foreach ( $pathsToLock as $bucket => $paths ) { - // Try to acquire the locks for this bucket - $res = $this->doLockingQueryAll( $bucket, $paths, $type ); - if ( $res === 'cantacquire' ) { - // Resources already locked by another process. - // Abort and unlock everything we just locked. - foreach ( $paths as $path ) { - $status->fatal( 'lockmanager-fail-acquirelock', $path ); - } - $status->merge( $this->doUnlock( $lockedPaths, $type ) ); - return $status; - } elseif ( $res !== true ) { - // Couldn't contact any DBs for this bucket. - // Abort and unlock everything we just locked. - $status->fatal( 'lockmanager-fail-db-bucket', $bucket ); - $status->merge( $this->doUnlock( $lockedPaths, $type ) ); - return $status; - } - // Record these locks as active - foreach ( $paths as $path ) { - $this->locksHeld[$path][$type] = 1; // locked - } - // Keep track of what locks were made in this attempt - $lockedPaths = array_merge( $lockedPaths, $paths ); - } - - return $status; - } - - /** - * @see LockManager::doUnlock() - */ - protected function doUnlock( array $paths, $type ) { - $status = Status::newGood(); - - foreach ( $paths as $path ) { - if ( !isset( $this->locksHeld[$path] ) ) { - $status->warning( 'lockmanager-notlocked', $path ); - } elseif ( !isset( $this->locksHeld[$path][$type] ) ) { - $status->warning( 'lockmanager-notlocked', $path ); - } else { - --$this->locksHeld[$path][$type]; - if ( $this->locksHeld[$path][$type] <= 0 ) { - unset( $this->locksHeld[$path][$type] ); - } - if ( !count( $this->locksHeld[$path] ) ) { - unset( $this->locksHeld[$path] ); // no SH or EX locks left for key - } - } - } - - // Reference count the locks held and COMMIT when zero - if ( !count( $this->locksHeld ) ) { - $status->merge( $this->finishLockTransactions() ); - } - - return $status; - } - - /** - * Get a connection to a lock DB and acquire locks on $paths. - * This does not use GET_LOCK() per http://bugs.mysql.com/bug.php?id=1118. - * - * @param $lockDb string - * @param $paths Array - * @param $type integer LockManager::LOCK_EX or LockManager::LOCK_SH - * @return bool Resources able to be locked - * @throws DBError - */ - protected function doLockingQuery( $lockDb, array $paths, $type ) { - if ( $type == self::LOCK_EX ) { // writer locks - $db = $this->getConnection( $lockDb ); - if ( !$db ) { - return false; // bad config - } - $keys = array_unique( array_map( 'LockManager::sha1Base36', $paths ) ); - # Build up values for INSERT clause - $data = array(); - foreach ( $keys as $key ) { - $data[] = array( 'fle_key' => $key ); - } - # Wait on any existing writers and block new ones if we get in - $db->insert( 'filelocks_exclusive', $data, __METHOD__ ); - } - return true; - } - - /** - * Attempt to acquire locks with the peers for a bucket. - * This should avoid throwing any exceptions. - * - * @param $bucket integer - * @param $paths Array List of resource keys to lock - * @param $type integer LockManager::LOCK_EX or LockManager::LOCK_SH - * @return bool|string One of (true, 'cantacquire', 'dberrors') - */ - protected function doLockingQueryAll( $bucket, array $paths, $type ) { - $yesVotes = 0; // locks made on trustable DBs - $votesLeft = count( $this->dbsByBucket[$bucket] ); // remaining DBs - $quorum = floor( $votesLeft/2 + 1 ); // simple majority - // Get votes for each DB, in order, until we have enough... - foreach ( $this->dbsByBucket[$bucket] as $lockDb ) { - // Check that DB is not *known* to be down - if ( $this->cacheCheckFailures( $lockDb ) ) { - try { - // Attempt to acquire the lock on this DB - if ( !$this->doLockingQuery( $lockDb, $paths, $type ) ) { - return 'cantacquire'; // vetoed; resource locked - } - ++$yesVotes; // success for this peer - if ( $yesVotes >= $quorum ) { - return true; // lock obtained - } - } catch ( DBConnectionError $e ) { - $this->cacheRecordFailure( $lockDb ); - } catch ( DBError $e ) { - if ( $this->lastErrorIndicatesLocked( $lockDb ) ) { - return 'cantacquire'; // vetoed; resource locked - } - } - } - --$votesLeft; - $votesNeeded = $quorum - $yesVotes; - if ( $votesNeeded > $votesLeft ) { - // In "trust cache" mode we don't have to meet the quorum - break; // short-circuit - } - } - // At this point, we must not have meet the quorum - return 'dberrors'; // not enough votes to ensure correctness - } - - /** - * Get (or reuse) a connection to a lock DB - * - * @param $lockDb string - * @return Database - * @throws DBError - */ - protected function getConnection( $lockDb ) { - if ( !isset( $this->conns[$lockDb] ) ) { - $db = null; - if ( $lockDb === 'localDBMaster' ) { - $lb = wfGetLBFactory()->newMainLB(); - $db = $lb->getConnection( DB_MASTER ); - } elseif ( isset( $this->dbServers[$lockDb] ) ) { - $config = $this->dbServers[$lockDb]; - $db = DatabaseBase::factory( $config['type'], $config ); - } - if ( !$db ) { - return null; // config error? - } - $this->conns[$lockDb] = $db; - $this->conns[$lockDb]->clearFlag( DBO_TRX ); - # If the connection drops, try to avoid letting the DB rollback - # and release the locks before the file operations are finished. - # This won't handle the case of DB server restarts however. - $options = array(); - if ( $this->lockExpiry > 0 ) { - $options['connTimeout'] = $this->lockExpiry; - } - $this->conns[$lockDb]->setSessionOptions( $options ); - $this->initConnection( $lockDb, $this->conns[$lockDb] ); - } - if ( !$this->conns[$lockDb]->trxLevel() ) { - $this->conns[$lockDb]->begin(); // start transaction - } - return $this->conns[$lockDb]; - } - - /** - * Do additional initialization for new lock DB connection - * - * @param $lockDb string - * @param $db DatabaseBase - * @return void - * @throws DBError - */ - protected function initConnection( $lockDb, DatabaseBase $db ) {} - - /** - * Commit all changes to lock-active databases. - * This should avoid throwing any exceptions. - * - * @return Status - */ - protected function finishLockTransactions() { - $status = Status::newGood(); - foreach ( $this->conns as $lockDb => $db ) { - if ( $db->trxLevel() ) { // in transaction - try { - $db->rollback(); // finish transaction and kill any rows - } catch ( DBError $e ) { - $status->fatal( 'lockmanager-fail-db-release', $lockDb ); - } - } - } - return $status; - } - - /** - * Check if the last DB error for $lockDb indicates - * that a requested resource was locked by another process. - * This should avoid throwing any exceptions. - * - * @param $lockDb string - * @return bool - */ - protected function lastErrorIndicatesLocked( $lockDb ) { - if ( isset( $this->conns[$lockDb] ) ) { // sanity - $db = $this->conns[$lockDb]; - return ( $db->wasDeadlock() || $db->wasLockTimeout() ); - } - return false; - } - - /** - * Checks if the DB has not recently had connection/query errors. - * This just avoids wasting time on doomed connection attempts. - * - * @param $lockDb string - * @return bool - */ - protected function cacheCheckFailures( $lockDb ) { - if ( $this->statusCache && $this->safeDelay > 0 ) { - $path = $this->getMissKey( $lockDb ); - $misses = $this->statusCache->get( $path ); - return !$misses; - } - return true; - } - - /** - * Log a lock request failure to the cache - * - * @param $lockDb string - * @return bool Success - */ - protected function cacheRecordFailure( $lockDb ) { - if ( $this->statusCache && $this->safeDelay > 0 ) { - $path = $this->getMissKey( $lockDb ); - $misses = $this->statusCache->get( $path ); - if ( $misses ) { - return $this->statusCache->incr( $path ); - } else { - return $this->statusCache->add( $path, 1, $this->safeDelay ); - } - } - return true; - } - - /** - * Get a cache key for recent query misses for a DB - * - * @param $lockDb string - * @return string - */ - protected function getMissKey( $lockDb ) { - return 'lockmanager:querymisses:' . str_replace( ' ', '_', $lockDb ); - } - - /** - * Get the bucket for resource path. - * This should avoid throwing any exceptions. - * - * @param $path string - * @return integer - */ - protected function getBucketFromKey( $path ) { - $prefix = substr( sha1( $path ), 0, 2 ); // first 2 hex chars (8 bits) - return intval( base_convert( $prefix, 16, 10 ) ) % count( $this->dbsByBucket ); - } - - /** - * Make sure remaining locks get cleared for sanity - */ - function __destruct() { - foreach ( $this->conns as $lockDb => $db ) { - if ( $db->trxLevel() ) { // in transaction - try { - $db->rollback(); // finish transaction and kill any rows - } catch ( DBError $e ) { - // oh well - } - } - $db->close(); - } - } -} - -/** - * MySQL version of DBLockManager that supports shared locks. - * All locks are non-blocking, which avoids deadlocks. - * - * @ingroup LockManager - */ -class MySqlLockManager extends DBLockManager { - /** @var Array Mapping of lock types to the type actually used */ - protected $lockTypeMap = array( - self::LOCK_SH => self::LOCK_SH, - self::LOCK_UW => self::LOCK_SH, - self::LOCK_EX => self::LOCK_EX - ); - - protected function initConnection( $lockDb, DatabaseBase $db ) { - # Let this transaction see lock rows from other transactions - $db->query( "SET SESSION TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;" ); - } - - protected function doLockingQuery( $lockDb, array $paths, $type ) { - $db = $this->getConnection( $lockDb ); - if ( !$db ) { - return false; - } - $keys = array_unique( array_map( 'LockManager::sha1Base36', $paths ) ); - # Build up values for INSERT clause - $data = array(); - foreach ( $keys as $key ) { - $data[] = array( 'fls_key' => $key, 'fls_session' => $this->session ); - } - # Block new writers... - $db->insert( 'filelocks_shared', $data, __METHOD__, array( 'IGNORE' ) ); - # Actually do the locking queries... - if ( $type == self::LOCK_SH ) { // reader locks - # Bail if there are any existing writers... - $blocked = $db->selectField( 'filelocks_exclusive', '1', - array( 'fle_key' => $keys ), - __METHOD__ - ); - # Prospective writers that haven't yet updated filelocks_exclusive - # will recheck filelocks_shared after doing so and bail due to our entry. - } else { // writer locks - $encSession = $db->addQuotes( $this->session ); - # Bail if there are any existing writers... - # The may detect readers, but the safe check for them is below. - # Note: if two writers come at the same time, both bail :) - $blocked = $db->selectField( 'filelocks_shared', '1', - array( 'fls_key' => $keys, "fls_session != $encSession" ), - __METHOD__ - ); - if ( !$blocked ) { - # Build up values for INSERT clause - $data = array(); - foreach ( $keys as $key ) { - $data[] = array( 'fle_key' => $key ); - } - # Block new readers/writers... - $db->insert( 'filelocks_exclusive', $data, __METHOD__ ); - # Bail if there are any existing readers... - $blocked = $db->selectField( 'filelocks_shared', '1', - array( 'fls_key' => $keys, "fls_session != $encSession" ), - __METHOD__ - ); - } - } - return !$blocked; - } -} diff --git a/includes/filerepo/backend/lockmanager/FSLockManager.php b/includes/filerepo/backend/lockmanager/FSLockManager.php deleted file mode 100644 index 42074fd3..00000000 --- a/includes/filerepo/backend/lockmanager/FSLockManager.php +++ /dev/null @@ -1,202 +0,0 @@ -<?php - -/** - * Simple version of LockManager based on using FS lock files. - * All locks are non-blocking, which avoids deadlocks. - * - * This should work fine for small sites running off one server. - * Do not use this with 'lockDirectory' set to an NFS mount unless the - * NFS client is at least version 2.6.12. Otherwise, the BSD flock() - * locks will be ignored; see http://nfs.sourceforge.net/#section_d. - * - * @ingroup LockManager - * @since 1.19 - */ -class FSLockManager extends LockManager { - /** @var Array Mapping of lock types to the type actually used */ - protected $lockTypeMap = array( - self::LOCK_SH => self::LOCK_SH, - self::LOCK_UW => self::LOCK_SH, - self::LOCK_EX => self::LOCK_EX - ); - - protected $lockDir; // global dir for all servers - - /** @var Array Map of (locked key => lock type => lock file handle) */ - protected $handles = array(); - - /** - * Construct a new instance from configuration. - * - * $config includes: - * 'lockDirectory' : Directory containing the lock files - * - * @param array $config - */ - function __construct( array $config ) { - parent::__construct( $config ); - $this->lockDir = $config['lockDirectory']; - } - - protected function doLock( array $paths, $type ) { - $status = Status::newGood(); - - $lockedPaths = array(); // files locked in this attempt - foreach ( $paths as $path ) { - $status->merge( $this->doSingleLock( $path, $type ) ); - if ( $status->isOK() ) { - $lockedPaths[] = $path; - } else { - // Abort and unlock everything - $status->merge( $this->doUnlock( $lockedPaths, $type ) ); - return $status; - } - } - - return $status; - } - - protected function doUnlock( array $paths, $type ) { - $status = Status::newGood(); - - foreach ( $paths as $path ) { - $status->merge( $this->doSingleUnlock( $path, $type ) ); - } - - return $status; - } - - /** - * Lock a single resource key - * - * @param $path string - * @param $type integer - * @return Status - */ - protected function doSingleLock( $path, $type ) { - $status = Status::newGood(); - - if ( isset( $this->locksHeld[$path][$type] ) ) { - ++$this->locksHeld[$path][$type]; - } elseif ( isset( $this->locksHeld[$path][self::LOCK_EX] ) ) { - $this->locksHeld[$path][$type] = 1; - } else { - wfSuppressWarnings(); - $handle = fopen( $this->getLockPath( $path ), 'a+' ); - wfRestoreWarnings(); - if ( !$handle ) { // lock dir missing? - wfMkdirParents( $this->lockDir ); - $handle = fopen( $this->getLockPath( $path ), 'a+' ); // try again - } - if ( $handle ) { - // Either a shared or exclusive lock - $lock = ( $type == self::LOCK_SH ) ? LOCK_SH : LOCK_EX; - if ( flock( $handle, $lock | LOCK_NB ) ) { - // Record this lock as active - $this->locksHeld[$path][$type] = 1; - $this->handles[$path][$type] = $handle; - } else { - fclose( $handle ); - $status->fatal( 'lockmanager-fail-acquirelock', $path ); - } - } else { - $status->fatal( 'lockmanager-fail-openlock', $path ); - } - } - - return $status; - } - - /** - * Unlock a single resource key - * - * @param $path string - * @param $type integer - * @return Status - */ - protected function doSingleUnlock( $path, $type ) { - $status = Status::newGood(); - - if ( !isset( $this->locksHeld[$path] ) ) { - $status->warning( 'lockmanager-notlocked', $path ); - } elseif ( !isset( $this->locksHeld[$path][$type] ) ) { - $status->warning( 'lockmanager-notlocked', $path ); - } else { - $handlesToClose = array(); - --$this->locksHeld[$path][$type]; - if ( $this->locksHeld[$path][$type] <= 0 ) { - unset( $this->locksHeld[$path][$type] ); - // If a LOCK_SH comes in while we have a LOCK_EX, we don't - // actually add a handler, so check for handler existence. - if ( isset( $this->handles[$path][$type] ) ) { - // Mark this handle to be unlocked and closed - $handlesToClose[] = $this->handles[$path][$type]; - unset( $this->handles[$path][$type] ); - } - } - // Unlock handles to release locks and delete - // any lock files that end up with no locks on them... - if ( wfIsWindows() ) { - // Windows: for any process, including this one, - // calling unlink() on a locked file will fail - $status->merge( $this->closeLockHandles( $path, $handlesToClose ) ); - $status->merge( $this->pruneKeyLockFiles( $path ) ); - } else { - // Unix: unlink() can be used on files currently open by this - // process and we must do so in order to avoid race conditions - $status->merge( $this->pruneKeyLockFiles( $path ) ); - $status->merge( $this->closeLockHandles( $path, $handlesToClose ) ); - } - } - - return $status; - } - - private function closeLockHandles( $path, array $handlesToClose ) { - $status = Status::newGood(); - foreach ( $handlesToClose as $handle ) { - wfSuppressWarnings(); - if ( !flock( $handle, LOCK_UN ) ) { - $status->fatal( 'lockmanager-fail-releaselock', $path ); - } - if ( !fclose( $handle ) ) { - $status->warning( 'lockmanager-fail-closelock', $path ); - } - wfRestoreWarnings(); - } - return $status; - } - - private function pruneKeyLockFiles( $path ) { - $status = Status::newGood(); - if ( !count( $this->locksHeld[$path] ) ) { - wfSuppressWarnings(); - # No locks are held for the lock file anymore - if ( !unlink( $this->getLockPath( $path ) ) ) { - $status->warning( 'lockmanager-fail-deletelock', $path ); - } - wfRestoreWarnings(); - unset( $this->locksHeld[$path] ); - unset( $this->handles[$path] ); - } - return $status; - } - - /** - * Get the path to the lock file for a key - * @param $path string - * @return string - */ - protected function getLockPath( $path ) { - $hash = self::sha1Base36( $path ); - return "{$this->lockDir}/{$hash}.lock"; - } - - function __destruct() { - // Make sure remaining locks get cleared for sanity - foreach ( $this->locksHeld as $path => $locks ) { - $this->doSingleUnlock( $path, self::LOCK_EX ); - $this->doSingleUnlock( $path, self::LOCK_SH ); - } - } -} diff --git a/includes/filerepo/backend/lockmanager/LSLockManager.php b/includes/filerepo/backend/lockmanager/LSLockManager.php deleted file mode 100644 index b7ac743c..00000000 --- a/includes/filerepo/backend/lockmanager/LSLockManager.php +++ /dev/null @@ -1,295 +0,0 @@ -<?php - -/** - * Manage locks using a lock daemon server. - * - * Version of LockManager based on using lock daemon servers. - * This is meant for multi-wiki systems that may share files. - * All locks are non-blocking, which avoids deadlocks. - * - * All lock requests for a resource, identified by a hash string, will map - * to one bucket. Each bucket maps to one or several peer servers, each - * running LockServerDaemon.php, listening on a designated TCP port. - * A majority of peers must agree for a lock to be acquired. - * - * @ingroup LockManager - * @since 1.19 - */ -class LSLockManager extends LockManager { - /** @var Array Mapping of lock types to the type actually used */ - protected $lockTypeMap = array( - self::LOCK_SH => self::LOCK_SH, - self::LOCK_UW => self::LOCK_SH, - self::LOCK_EX => self::LOCK_EX - ); - - /** @var Array Map of server names to server config */ - protected $lockServers; // (server name => server config array) - /** @var Array Map of bucket indexes to peer server lists */ - protected $srvsByBucket; // (bucket index => (lsrv1, lsrv2, ...)) - - /** @var Array Map Server connections (server name => resource) */ - protected $conns = array(); - - protected $connTimeout; // float number of seconds - protected $session = ''; // random SHA-1 string - - /** - * Construct a new instance from configuration. - * - * $config paramaters include: - * 'lockServers' : Associative array of server names to configuration. - * Configuration is an associative array that includes: - * 'host' - IP address/hostname - * 'port' - TCP port - * 'authKey' - Secret string the lock server uses - * 'srvsByBucket' : Array of 1-16 consecutive integer keys, starting from 0, - * each having an odd-numbered list of server names (peers) as values. - * 'connTimeout' : Lock server connection attempt timeout. [optional] - * - * @param Array $config - */ - public function __construct( array $config ) { - $this->lockServers = $config['lockServers']; - // Sanitize srvsByBucket config to prevent PHP errors - $this->srvsByBucket = array_filter( $config['srvsByBucket'], 'is_array' ); - $this->srvsByBucket = array_values( $this->srvsByBucket ); // consecutive - - if ( isset( $config['connTimeout'] ) ) { - $this->connTimeout = $config['connTimeout']; - } else { - $this->connTimeout = 3; // use some sane amount - } - - $this->session = ''; - for ( $i = 0; $i < 5; $i++ ) { - $this->session .= mt_rand( 0, 2147483647 ); - } - $this->session = wfBaseConvert( sha1( $this->session ), 16, 36, 31 ); - } - - protected function doLock( array $paths, $type ) { - $status = Status::newGood(); - - $pathsToLock = array(); - // Get locks that need to be acquired (buckets => locks)... - foreach ( $paths as $path ) { - if ( isset( $this->locksHeld[$path][$type] ) ) { - ++$this->locksHeld[$path][$type]; - } elseif ( isset( $this->locksHeld[$path][self::LOCK_EX] ) ) { - $this->locksHeld[$path][$type] = 1; - } else { - $bucket = $this->getBucketFromKey( $path ); - $pathsToLock[$bucket][] = $path; - } - } - - $lockedPaths = array(); // files locked in this attempt - // Attempt to acquire these locks... - foreach ( $pathsToLock as $bucket => $paths ) { - // Try to acquire the locks for this bucket - $res = $this->doLockingRequestAll( $bucket, $paths, $type ); - if ( $res === 'cantacquire' ) { - // Resources already locked by another process. - // Abort and unlock everything we just locked. - foreach ( $paths as $path ) { - $status->fatal( 'lockmanager-fail-acquirelock', $path ); - } - $status->merge( $this->doUnlock( $lockedPaths, $type ) ); - return $status; - } elseif ( $res !== true ) { - // Couldn't contact any servers for this bucket. - // Abort and unlock everything we just locked. - foreach ( $paths as $path ) { - $status->fatal( 'lockmanager-fail-acquirelock', $path ); - } - $status->merge( $this->doUnlock( $lockedPaths, $type ) ); - return $status; - } - // Record these locks as active - foreach ( $paths as $path ) { - $this->locksHeld[$path][$type] = 1; // locked - } - // Keep track of what locks were made in this attempt - $lockedPaths = array_merge( $lockedPaths, $paths ); - } - - return $status; - } - - protected function doUnlock( array $paths, $type ) { - $status = Status::newGood(); - - foreach ( $paths as $path ) { - if ( !isset( $this->locksHeld[$path] ) ) { - $status->warning( 'lockmanager-notlocked', $path ); - } elseif ( !isset( $this->locksHeld[$path][$type] ) ) { - $status->warning( 'lockmanager-notlocked', $path ); - } else { - --$this->locksHeld[$path][$type]; - if ( $this->locksHeld[$path][$type] <= 0 ) { - unset( $this->locksHeld[$path][$type] ); - } - if ( !count( $this->locksHeld[$path] ) ) { - unset( $this->locksHeld[$path] ); // no SH or EX locks left for key - } - } - } - - // Reference count the locks held and release locks when zero - if ( !count( $this->locksHeld ) ) { - $status->merge( $this->releaseLocks() ); - } - - return $status; - } - - /** - * Get a connection to a lock server and acquire locks on $paths - * - * @param $lockSrv string - * @param $paths Array - * @param $type integer LockManager::LOCK_EX or LockManager::LOCK_SH - * @return bool Resources able to be locked - */ - protected function doLockingRequest( $lockSrv, array $paths, $type ) { - if ( $type == self::LOCK_SH ) { // reader locks - $type = 'SH'; - } elseif ( $type == self::LOCK_EX ) { // writer locks - $type = 'EX'; - } else { - return true; // ok... - } - - // Send out the command and get the response... - $keys = array_unique( array_map( 'LockManager::sha1Base36', $paths ) ); - $response = $this->sendCommand( $lockSrv, 'ACQUIRE', $type, $keys ); - - return ( $response === 'ACQUIRED' ); - } - - /** - * Send a command and get back the response - * - * @param $lockSrv string - * @param $action string - * @param $type string - * @param $values Array - * @return string|false - */ - protected function sendCommand( $lockSrv, $action, $type, $values ) { - $conn = $this->getConnection( $lockSrv ); - if ( !$conn ) { - return false; // no connection - } - $authKey = $this->lockServers[$lockSrv]['authKey']; - // Build of the command as a flat string... - $values = implode( '|', $values ); - $key = sha1( $this->session . $action . $type . $values . $authKey ); - // Send out the command... - if ( fwrite( $conn, "{$this->session}:$key:$action:$type:$values\n" ) === false ) { - return false; - } - // Get the response... - $response = fgets( $conn ); - if ( $response === false ) { - return false; - } - return trim( $response ); - } - - /** - * Attempt to acquire locks with the peers for a bucket - * - * @param $bucket integer - * @param $paths Array List of resource keys to lock - * @param $type integer LockManager::LOCK_EX or LockManager::LOCK_SH - * @return bool|string One of (true, 'cantacquire', 'srverrors') - */ - protected function doLockingRequestAll( $bucket, array $paths, $type ) { - $yesVotes = 0; // locks made on trustable servers - $votesLeft = count( $this->srvsByBucket[$bucket] ); // remaining peers - $quorum = floor( $votesLeft/2 + 1 ); // simple majority - // Get votes for each peer, in order, until we have enough... - foreach ( $this->srvsByBucket[$bucket] as $lockSrv ) { - // Attempt to acquire the lock on this peer - if ( !$this->doLockingRequest( $lockSrv, $paths, $type ) ) { - return 'cantacquire'; // vetoed; resource locked - } - ++$yesVotes; // success for this peer - if ( $yesVotes >= $quorum ) { - return true; // lock obtained - } - --$votesLeft; - $votesNeeded = $quorum - $yesVotes; - if ( $votesNeeded > $votesLeft ) { - // In "trust cache" mode we don't have to meet the quorum - break; // short-circuit - } - } - // At this point, we must not have meet the quorum - return 'srverrors'; // not enough votes to ensure correctness - } - - /** - * Get (or reuse) a connection to a lock server - * - * @param $lockSrv string - * @return resource - */ - protected function getConnection( $lockSrv ) { - if ( !isset( $this->conns[$lockSrv] ) ) { - $cfg = $this->lockServers[$lockSrv]; - wfSuppressWarnings(); - $errno = $errstr = ''; - $conn = fsockopen( $cfg['host'], $cfg['port'], $errno, $errstr, $this->connTimeout ); - wfRestoreWarnings(); - if ( $conn === false ) { - return null; - } - $sec = floor( $this->connTimeout ); - $usec = floor( ( $this->connTimeout - floor( $this->connTimeout ) ) * 1e6 ); - stream_set_timeout( $conn, $sec, $usec ); - $this->conns[$lockSrv] = $conn; - } - return $this->conns[$lockSrv]; - } - - /** - * Release all locks that this session is holding - * - * @return Status - */ - protected function releaseLocks() { - $status = Status::newGood(); - foreach ( $this->conns as $lockSrv => $conn ) { - $response = $this->sendCommand( $lockSrv, 'RELEASE_ALL', '', array() ); - if ( $response !== 'RELEASED_ALL' ) { - $status->fatal( 'lockmanager-fail-svr-release', $lockSrv ); - } - } - return $status; - } - - /** - * Get the bucket for resource path. - * This should avoid throwing any exceptions. - * - * @param $path string - * @return integer - */ - protected function getBucketFromKey( $path ) { - $prefix = substr( sha1( $path ), 0, 2 ); // first 2 hex chars (8 bits) - return intval( base_convert( $prefix, 16, 10 ) ) % count( $this->srvsByBucket ); - } - - /** - * Make sure remaining locks get cleared for sanity - */ - function __destruct() { - $this->releaseLocks(); - foreach ( $this->conns as $conn ) { - fclose( $conn ); - } - } -} diff --git a/includes/filerepo/backend/lockmanager/LockManager.php b/includes/filerepo/backend/lockmanager/LockManager.php deleted file mode 100644 index 23603a4f..00000000 --- a/includes/filerepo/backend/lockmanager/LockManager.php +++ /dev/null @@ -1,182 +0,0 @@ -<?php -/** - * @defgroup LockManager Lock management - * @ingroup FileBackend - */ - -/** - * @file - * @ingroup LockManager - * @author Aaron Schulz - */ - -/** - * Class for handling resource locking. - * - * Locks on resource keys can either be shared or exclusive. - * - * Implementations must keep track of what is locked by this proccess - * in-memory and support nested locking calls (using reference counting). - * At least LOCK_UW and LOCK_EX must be implemented. LOCK_SH can be a no-op. - * Locks should either be non-blocking or have low wait timeouts. - * - * Subclasses should avoid throwing exceptions at all costs. - * - * @ingroup LockManager - * @since 1.19 - */ -abstract class LockManager { - /** @var Array Mapping of lock types to the type actually used */ - protected $lockTypeMap = array( - self::LOCK_SH => self::LOCK_SH, - self::LOCK_UW => self::LOCK_EX, // subclasses may use self::LOCK_SH - self::LOCK_EX => self::LOCK_EX - ); - - /** @var Array Map of (resource path => lock type => count) */ - protected $locksHeld = array(); - - /* Lock types; stronger locks have higher values */ - const LOCK_SH = 1; // shared lock (for reads) - const LOCK_UW = 2; // shared lock (for reads used to write elsewhere) - const LOCK_EX = 3; // exclusive lock (for writes) - - /** - * Construct a new instance from configuration - * - * @param $config Array - */ - public function __construct( array $config ) {} - - /** - * Lock the resources at the given abstract paths - * - * @param $paths Array List of resource names - * @param $type integer LockManager::LOCK_* constant - * @return Status - */ - final public function lock( array $paths, $type = self::LOCK_EX ) { - return $this->doLock( array_unique( $paths ), $this->lockTypeMap[$type] ); - } - - /** - * Unlock the resources at the given abstract paths - * - * @param $paths Array List of storage paths - * @param $type integer LockManager::LOCK_* constant - * @return Status - */ - final public function unlock( array $paths, $type = self::LOCK_EX ) { - return $this->doUnlock( array_unique( $paths ), $this->lockTypeMap[$type] ); - } - - /** - * Get the base 36 SHA-1 of a string, padded to 31 digits - * - * @param $path string - * @return string - */ - final protected static function sha1Base36( $path ) { - return wfBaseConvert( sha1( $path ), 16, 36, 31 ); - } - - /** - * Lock resources with the given keys and lock type - * - * @param $paths Array List of storage paths - * @param $type integer LockManager::LOCK_* constant - * @return string - */ - abstract protected function doLock( array $paths, $type ); - - /** - * Unlock resources with the given keys and lock type - * - * @param $paths Array List of storage paths - * @param $type integer LockManager::LOCK_* constant - * @return string - */ - abstract protected function doUnlock( array $paths, $type ); -} - -/** - * Self releasing locks - * - * LockManager helper class to handle scoped locks, which - * release when an object is destroyed or goes out of scope. - * - * @ingroup LockManager - * @since 1.19 - */ -class ScopedLock { - /** @var LockManager */ - protected $manager; - /** @var Status */ - protected $status; - /** @var Array List of resource paths*/ - protected $paths; - - protected $type; // integer lock type - - /** - * @param $manager LockManager - * @param $paths Array List of storage paths - * @param $type integer LockManager::LOCK_* constant - * @param $status Status - */ - protected function __construct( - LockManager $manager, array $paths, $type, Status $status - ) { - $this->manager = $manager; - $this->paths = $paths; - $this->status = $status; - $this->type = $type; - } - - protected function __clone() {} - - /** - * Get a ScopedLock object representing a lock on resource paths. - * Any locks are released once this object goes out of scope. - * The status object is updated with any errors or warnings. - * - * @param $manager LockManager - * @param $paths Array List of storage paths - * @param $type integer LockManager::LOCK_* constant - * @param $status Status - * @return ScopedLock|null Returns null on failure - */ - public static function factory( - LockManager $manager, array $paths, $type, Status $status - ) { - $lockStatus = $manager->lock( $paths, $type ); - $status->merge( $lockStatus ); - if ( $lockStatus->isOK() ) { - return new self( $manager, $paths, $type, $status ); - } - return null; - } - - function __destruct() { - $wasOk = $this->status->isOK(); - $this->status->merge( $this->manager->unlock( $this->paths, $this->type ) ); - if ( $wasOk ) { - // Make sure status is OK, despite any unlockFiles() fatals - $this->status->setResult( true, $this->status->value ); - } - } -} - -/** - * Simple version of LockManager that does nothing - * @since 1.19 - */ -class NullLockManager extends LockManager { - protected function doLock( array $paths, $type ) { - return Status::newGood(); - } - - protected function doUnlock( array $paths, $type ) { - return Status::newGood(); - } -} diff --git a/includes/filerepo/backend/lockmanager/LockManagerGroup.php b/includes/filerepo/backend/lockmanager/LockManagerGroup.php deleted file mode 100644 index 11e77972..00000000 --- a/includes/filerepo/backend/lockmanager/LockManagerGroup.php +++ /dev/null @@ -1,89 +0,0 @@ -<?php -/** - * Class to handle file lock manager registration - * - * @ingroup LockManager - * @author Aaron Schulz - * @since 1.19 - */ -class LockManagerGroup { - - /** - * @var LockManagerGroup - */ - protected static $instance = null; - - /** @var Array of (name => ('class' =>, 'config' =>, 'instance' =>)) */ - protected $managers = array(); - - protected function __construct() {} - protected function __clone() {} - - /** - * @return LockManagerGroup - */ - public static function singleton() { - if ( self::$instance == null ) { - self::$instance = new self(); - self::$instance->initFromGlobals(); - } - return self::$instance; - } - - /** - * Register lock managers from the global variables - * - * @return void - */ - protected function initFromGlobals() { - global $wgLockManagers; - - $this->register( $wgLockManagers ); - } - - /** - * Register an array of file lock manager configurations - * - * @param $configs Array - * @return void - * @throws MWException - */ - protected function register( array $configs ) { - foreach ( $configs as $config ) { - if ( !isset( $config['name'] ) ) { - throw new MWException( "Cannot register a lock manager with no name." ); - } - $name = $config['name']; - if ( !isset( $config['class'] ) ) { - throw new MWException( "Cannot register lock manager `{$name}` with no class." ); - } - $class = $config['class']; - unset( $config['class'] ); // lock manager won't need this - $this->managers[$name] = array( - 'class' => $class, - 'config' => $config, - 'instance' => null - ); - } - } - - /** - * Get the lock manager object with a given name - * - * @param $name string - * @return LockManager - * @throws MWException - */ - public function get( $name ) { - if ( !isset( $this->managers[$name] ) ) { - throw new MWException( "No lock manager defined with the name `$name`." ); - } - // Lazy-load the actual lock manager instance - if ( !isset( $this->managers[$name]['instance'] ) ) { - $class = $this->managers[$name]['class']; - $config = $this->managers[$name]['config']; - $this->managers[$name]['instance'] = new $class( $config ); - } - return $this->managers[$name]['instance']; - } -} |