Base class for all backends using particular storage medium. More...

Inheritance diagram for FileBackendStore:

Collaboration diagram for FileBackendStore:

Public Member Functions
	__construct (array $config)

	clearCache (array $paths=null)

	concatenate (array $params)

	copyInternal (array $params)
	Copy a file from one storage path to another in the backend. More...

	createInternal (array $params)
	Create a file in the backend with the given contents. More...

	deleteInternal (array $params)
	Delete a file at the storage path. More...

	describeInternal (array $params)
	Alter metadata for a file at the storage path. More...

	directoryExists (array $params)

	executeOpHandlesInternal (array $fileOpHandles)
	Execute a list of FileBackendStoreOpHandle handles in parallel. More...

	fileExists (array $params)

	getDirectoryList (array $params)

	getDirectoryListInternal ($container, $dir, array $params)
	Do not call this function from places outside FileBackend. More...

	getFileContentsMulti (array $params)

	getFileHttpUrl (array $params)

	getFileList (array $params)

	getFileListInternal ($container, $dir, array $params)
	Do not call this function from places outside FileBackend. More...

	getFileProps (array $params)

	getFileSha1Base36 (array $params)

	getFileSize (array $params)

	getFileStat (array $params)

	getFileTimestamp (array $params)

	getFileXAttributes (array $params)

	getLocalCopyMulti (array $params)

	getLocalReferenceMulti (array $params)

	getOperationsInternal (array $ops)
	Return a list of FileOp objects from a list of operations. More...

	getPathsToLockForOpsInternal (array $performOps)
	Get a list of storage paths to lock for a list of operations Returns an array with LockManager::LOCK_UW (shared locks) and LockManager::LOCK_EX (exclusive locks) keys, each corresponding to a list of storage paths to be locked. More...

	getScopedLocksForOps (array $ops, Status $status)

	isPathUsableInternal ($storagePath)
	Check if a file can be created or changed at a given storage path. More...

	isSingleShardPathInternal ($storagePath)
	Check if a storage path maps to a single shard. More...

	maxFileSizeInternal ()
	Get the maximum allowable file size given backend medium restrictions and basic performance constraints. More...

	moveInternal (array $params)
	Move a file from one storage path to another in the backend. More...

	nullInternal (array $params)
	No-op file operation that does nothing. More...

	preloadCache (array $paths)

	preloadFileStat (array $params)

	storeInternal (array $params)
	Store a file into the backend from a file on disk. More...

	streamFile (array $params)

Public Member Functions inherited from FileBackend
	__construct (array $config)
	Create a new backend instance from configuration. More...

	clean (array $params)
	Delete a storage directory if it is empty. More...

	clearCache (array $paths=null)
	Invalidate any in-process file stat and property cache. More...

	concatenate (array $params)
	Concatenate a list of storage files into a single file system file. More...

	copy (array $params, array $opts=[])
	Performs a single copy operation. More...

	create (array $params, array $opts=[])
	Performs a single create operation. More...

	delete (array $params, array $opts=[])
	Performs a single delete operation. More...

	describe (array $params, array $opts=[])
	Performs a single describe operation. More...

	directoryExists (array $params)
	Check if a directory exists at a given storage path. More...

	doOperation (array $op, array $opts=[])
	Same as doOperations() except it takes a single operation. More...

	doOperations (array $ops, array $opts=[])
	This is the main entry point into the backend for write operations. More...

	doQuickOperation (array $op)
	Same as doQuickOperations() except it takes a single operation. More...

	doQuickOperations (array $ops, array $opts=[])
	Perform a set of independent file operations on some files. More...

	fileExists (array $params)
	Check if a file exists at a storage path in the backend. More...

	getContainerStoragePath ($container)
	Get the storage path for the given container for this backend. More...

	getDirectoryList (array $params)
	Get an iterator to list all directories under a storage directory. More...

	getFeatures ()
	Get the a bitfield of extra features supported by the backend medium. More...

	getFileContents (array $params)
	Get the contents of a file at a storage path in the backend. More...

	getFileContentsMulti (array $params)
	Like getFileContents() except it takes an array of storage paths and returns a map of storage paths to strings (or null on failure). More...

	getFileHttpUrl (array $params)
	Return an HTTP URL to a given file that requires no authentication to use. More...

	getFileList (array $params)
	Get an iterator to list all stored files under a storage directory. More...

	getFileProps (array $params)
	Get the properties of the file at a storage path in the backend. More...

	getFileSha1Base36 (array $params)
	Get a SHA-1 hash of the file at a storage path in the backend. More...

	getFileSize (array $params)
	Get the size (bytes) of a file at a storage path in the backend. More...

	getFileStat (array $params)
	Get quick information about a file at a storage path in the backend. More...

	getFileTimestamp (array $params)
	Get the last-modified timestamp of the file at a storage path. More...

	getFileXAttributes (array $params)
	Get metadata about a file at a storage path in the backend. More...

	getJournal ()
	Get the file journal object for this backend. More...

	getLocalCopy (array $params)
	Get a local copy on disk of the file at a storage path in the backend. More...

	getLocalCopyMulti (array $params)
	Like getLocalCopy() except it takes an array of storage paths and returns a map of storage paths to TempFSFile objects (or null on failure). More...

	getLocalReference (array $params)
	Returns a file system file, identical to the file at a storage path. More...

	getLocalReferenceMulti (array $params)
	Like getLocalReference() except it takes an array of storage paths and returns a map of storage paths to FSFile objects (or null on failure). More...

	getName ()
	Get the unique backend name. More...

	getReadOnlyReason ()
	Get an explanatory message if this backend is read-only. More...

	getRootStoragePath ()
	Get the root storage path of this backend. More...

	getScopedFileLocks (array $paths, $type, Status $status, $timeout=0)
	Lock the files at the given storage paths in the backend. More...

	getScopedLocksForOps (array $ops, Status $status)
	Get an array of scoped locks needed for a batch of file operations. More...

	getTopDirectoryList (array $params)
	Same as FileBackend::getDirectoryList() except only lists directories that are immediately under the given directory. More...

	getTopFileList (array $params)
	Same as FileBackend::getFileList() except only lists files that are immediately under the given directory. More...

	getWikiId ()
	Get the wiki identifier used for this backend (possibly empty). More...

	hasFeatures ($bitfield)
	Check if the backend medium supports a field of extra features. More...

	isReadOnly ()
	Check if this backend is read-only. More...

	lockFiles (array $paths, $type, $timeout=0)
	Lock the files at the given storage paths in the backend. More...

	move (array $params, array $opts=[])
	Performs a single move operation. More...

	preloadCache (array $paths)
	Preload persistent file stat cache and property cache into in-process cache. More...

	preloadFileStat (array $params)
	Preload file stat information (concurrently if possible) into in-process cache. More...

	prepare (array $params)
	Prepare a storage directory for usage. More...

	publish (array $params)
	Remove measures to block web access to a storage directory and the container it belongs to. More...

	quickCopy (array $params)
	Performs a single quick copy operation. More...

	quickCreate (array $params)
	Performs a single quick create operation. More...

	quickDelete (array $params)
	Performs a single quick delete operation. More...

	quickDescribe (array $params)
	Performs a single quick describe operation. More...

	quickMove (array $params)
	Performs a single quick move operation. More...

	quickStore (array $params)
	Performs a single quick store operation. More...

	secure (array $params)
	Take measures to block web access to a storage directory and the container it belongs to. More...

	store (array $params, array $opts=[])
	Performs a single store operation. More...

	streamFile (array $params)
	Stream the file at a storage path in the backend. More...

	unlockFiles (array $paths, $type)
	Unlock the files at the given storage paths in the backend. More...

Public Attributes
const	CACHE_CHEAP_SIZE = 500

const	CACHE_EXPENSIVE_SIZE = 5

const	CACHE_TTL = 10

Public Attributes inherited from FileBackend
const	ATTR_HEADERS = 1
	Bitfield flags for supported features. More...

const	ATTR_METADATA = 2

const	ATTR_UNICODE_PATHS = 4

Protected Member Functions
	deleteContainerCache ($container)
	Delete the cached info for a container. More...

	deleteFileCache ($path)
	Delete the cached stat info for a file path. More...

	directoriesAreVirtual ()
	Is this a key/value store where directories are just virtual? Virtual directories exists in so much as files exists that are prefixed with the directory path followed by a forward slash. More...

	doClean (array $params)

	doCleanInternal ($container, $dir, array $params)

	doClearCache (array $paths=null)
	Clears any additional stat caches for storage paths. More...

	doConcatenate (array $params)

	doCopyInternal (array $params)

	doCreateInternal (array $params)

	doDeleteInternal (array $params)

	doDescribeInternal (array $params)

	doDirectoryExists ($container, $dir, array $params)

	doExecuteOpHandlesInternal (array $fileOpHandles)

	doGetFileContentsMulti (array $params)

	doGetFileSha1Base36 (array $params)

	doGetFileStat (array $params)

	doGetFileStatMulti (array $params)
	Get file stat information (concurrently if possible) for several files. More...

	doGetFileXAttributes (array $params)

	doGetLocalCopyMulti (array $params)

	doGetLocalReferenceMulti (array $params)

	doMoveInternal (array $params)

	doOperationsInternal (array $ops, array $opts)

	doPrepare (array $params)

	doPrepareInternal ($container, $dir, array $params)

	doPrimeContainerCache (array $containerInfo)
	Fill the backend-specific process cache given an array of resolved container names and their corresponding cached info. More...

	doPublish (array $params)

	doPublishInternal ($container, $dir, array $params)

	doQuickOperationsInternal (array $ops)

	doSecure (array $params)

	doSecureInternal ($container, $dir, array $params)

	doStoreInternal (array $params)

	doStreamFile (array $params)

	fullContainerName ($container)
	Get the full container name, including the wiki ID prefix. More...

	getContainerHashLevels ($container)
	Get the sharding config for a container. More...

	getContainerShard ($container, $relPath)
	Get the container name shard suffix for a given path. More...

	getContainerSuffixes ($container)
	Get a list of full container shard suffixes for a container. More...

	getContentType ($storagePath, $content, $fsPath)
	Get the content type to use in HEAD/GET requests for a file. More...

	primeContainerCache (array $items)
	Do a batch lookup from cache for container stats for all containers used in a list of container names or storage paths objects. More...

	primeFileCache (array $items)
	Do a batch lookup from cache for file stats for all paths used in a list of storage paths or FileOp objects. More...

	resolveContainerName ($container)
	Resolve a container name, checking if it's allowed by the backend. More...

	resolveContainerPath ($container, $relStoragePath)
	Resolve a relative storage path, checking if it's allowed by the backend. More...

	resolveStoragePath ($storagePath)
	Splits a storage path into an internal container name, an internal relative file name, and a container shard suffix. More...

	resolveStoragePathReal ($storagePath)
	Like resolveStoragePath() except null values are returned if the container is sharded and the shard could not be determined or if the path ends with '/'. More...

	sanitizeOpHeaders (array $op)
	Normalize and filter HTTP headers from a file operation. More...

	setConcurrencyFlags (array $opts)
	Set the 'concurrency' option from a list of operation options. More...

	setContainerCache ($container, array $val)
	Set the cached info for a container. More...

	setFileCache ($path, array $val)
	Set the cached stat info for a file path. More...

Protected Member Functions inherited from FileBackend
	doClean (array $params)

	doOperationsInternal (array $ops, array $opts)

	doPrepare (array $params)

	doPublish (array $params)

	doQuickOperationsInternal (array $ops)

	doSecure (array $params)

	getScopedPHPBehaviorForOps ()
	Enter file operation scope. More...

	resolveFSFileObjects (array $ops)
	Convert FSFile 'src' paths to string paths (with an 'srcRef' field set to the FSFile) More...

Static Protected Member Functions
static	isValidContainerName ($container)
	Check if a full container name is valid. More...

static	isValidShortContainerName ($container)
	Check if a short container name is valid. More...

static	normalizeXAttributes (array $xattr)
	Normalize file headers/metadata to the FileBackend::getFileXAttributes() format. More...

Static Protected Member Functions inherited from FileBackend
static	normalizeContainerPath ($path)
	Validate and normalize a relative storage path. More...

Protected Attributes
ProcessCacheLRU	$cheapCache
	Map of paths to small (RAM/disk) cache items. More...

ProcessCacheLRU	$expensiveCache
	Map of paths to large (RAM/disk) cache items. More...

	$maxFileSize = 4294967296

WANObjectCache	$memCache

callable	$mimeCallback
	Method to get the MIME type of files. More...

array	$shardViaHashLevels = []
	Map of container names to sharding config. More...

Protected Attributes inherited from FileBackend
int	$concurrency
	How many operations can be done in parallel. More...

FileJournal	$fileJournal

LockManager	$lockManager

string	$name
	Unique backend name. More...

string	$parallelize
	When to do operations in parallel. More...

string	$readOnly
	Read-only explanation message. More...

string	$wikiId
	Unique wiki name. More...

Private Member Functions
	containerCacheKey ($container)
	Get the cache key for a container. More...

	fileCacheKey ($path)
	Get the cache key for a file path. More...

Additional Inherited Members
Static Public Member Functions inherited from FileBackend
static	extensionFromPath ($path, $case= 'lowercase')
	Get the final extension from a storage or FS path. More...

static	isPathTraversalFree ($path)
	Check if a relative path has no directory traversals. More...

static	isStoragePath ($path)
	Check if a given path is a "mwstore://" path. More...

static	makeContentDisposition ($type, $filename= '')
	Build a Content-Disposition header value per RFC 6266. More...

static	normalizeStoragePath ($storagePath)
	Normalize a storage path by cleaning up directory separators. More...

static	parentStoragePath ($storagePath)
	Get the parent storage directory of a storage path. More...

static	splitStoragePath ($storagePath)
	Split a storage path into a backend name, a container name, and a relative file path. More...

Detailed Description

Base class for all backends using 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.

Since: 1.19

Definition at line 38 of file FileBackendStore.php.

Constructor & Destructor Documentation

FileBackendStore::__construct ( array $config )

See Also

FileBackend::__construct() Additional $config params include:

wanCache : WANObjectCache object to use for persistent caching.
mimeCallback : Callback that takes (storage path, content, file system path) and returns the MIME type of the file or 'unknown/unknown'. The file system path parameter should be used if the content one is null.

Parameters

array $config

Definition at line 68 of file FileBackendStore.php.

References WANObjectCache\newEmpty().

Member Function Documentation

FileBackendStore::clearCache ( array $paths = null )

final

Definition at line 1271 of file FileBackendStore.php.

References $path, as, and doClearCache().

Referenced by copyInternal(), createInternal(), deleteInternal(), describeInternal(), SwiftFileBackend\doGetFileSha1base36(), SwiftFileBackend\doGetFileXAttributes(), doOperationsInternal(), doQuickOperationsInternal(), SwiftFileBackend\doStreamFile(), moveInternal(), and storeInternal().

FileBackendStore::concatenate ( array $params )

final

Definition at line 346 of file FileBackendStore.php.

References $status, doConcatenate(), FileBackend\getScopedFileLocks(), Profiler\instance(), LockManager\LOCK_UW, Status\newGood(), and wfDebugLog().

FileBackendStore::containerCacheKey ( $container )

private

Get the cache key for a container.

Parameters

string $container Resolved container name

Returns: string

Definition at line 1607 of file FileBackendStore.php.

Referenced by primeContainerCache(), and setContainerCache().

FileBackendStore::copyInternal ( array $params )

final

Copy a file from one storage path to another in the backend.

This will overwrite any file that exists at the destination. Do not call this function from places outside FileBackend and FileOp.

$params include:

src : source storage path
dst : destination storage path
ignoreMissingSource : do nothing if the source file does not exist
headers : HTTP header name/value map
async : Status will be returned immediately if supported. If the status is OK, then its value field will be set to a FileBackendStoreOpHandle object.
dstExists : Whether a file exists at the destination (optimization). Callers can use "false" if no existing file is being changed.

Parameters

array $params

Returns: Status

Definition at line 201 of file FileBackendStore.php.

References $status, clearCache(), deleteFileCache(), doCopyInternal(), and Profiler\instance().

Referenced by doMoveInternal().

FileBackendStore::createInternal ( array $params )

final

Create a file in the backend with the given contents.

This will overwrite any file that exists at the destination. Do not call this function from places outside FileBackend and FileOp.

$params include:

content : the raw file contents
dst : destination storage path
headers : HTTP header name/value map
async : Status will be returned immediately if supported. If the status is OK, then its value field will be set to a FileBackendStoreOpHandle object.
dstExists : Whether a file exists at the destination (optimization). Callers can use "false" if no existing file is being changed.

Parameters

array $params

Returns: Status

Definition at line 118 of file FileBackendStore.php.

References $status, clearCache(), deleteFileCache(), doCreateInternal(), Profiler\instance(), maxFileSizeInternal(), and Status\newFatal().

FileBackendStore::deleteContainerCache ( $container )

finalprotected

Delete the cached info for a container.

The cache key is salted for a while to prevent race conditions.

Parameters

string $container Resolved container name

Definition at line 1627 of file FileBackendStore.php.

Referenced by doClean().

FileBackendStore::deleteFileCache ( $path )

finalprotected

Delete the cached stat info for a file path.

The cache key is salted for a while to prevent race conditions. Since negatives (404s) are not cached, this does not need to be called when a file is created at a path were there was none before.

Parameters

string $path Storage path

Definition at line 1720 of file FileBackendStore.php.

References $path, and FileBackend\normalizeStoragePath().

Referenced by SwiftFileBackend\addMissingMetadata(), copyInternal(), createInternal(), deleteInternal(), describeInternal(), SwiftFileBackend\doStreamFile(), moveInternal(), and storeInternal().

FileBackendStore::deleteInternal ( array $params )

final

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
async : Status will be returned immediately if supported. If the status is OK, then its value field will be set to a FileBackendStoreOpHandle object.

Parameters

array $params

Returns: Status

Definition at line 233 of file FileBackendStore.php.

References $status, clearCache(), deleteFileCache(), doDeleteInternal(), and Profiler\instance().

Referenced by doMoveInternal().

FileBackendStore::describeInternal ( array $params )

final

Alter metadata for a file at the storage path.

Do not call this function from places outside FileBackend and FileOp.

$params include:

src : source storage path
headers : HTTP header name/value map
async : Status will be returned immediately if supported. If the status is OK, then its value field will be set to a FileBackendStoreOpHandle object.

Parameters

array $params

Returns: Status

Definition at line 313 of file FileBackendStore.php.

References $status, clearCache(), deleteFileCache(), doDescribeInternal(), Profiler\instance(), and Status\newGood().

FileBackendStore::directoriesAreVirtual ( )

abstractprotected

Is this a key/value store where directories are just virtual? Virtual directories exists in so much as files exists that are prefixed with the directory path followed by a forward slash.

Returns: bool

Referenced by doClean().

FileBackendStore::directoryExists ( array $params )

final

Definition at line 892 of file FileBackendStore.php.

References $dir, $res, as, doDirectoryExists(), getContainerSuffixes(), list, resolveStoragePath(), and wfDebug().

FileBackendStore::doClean ( array $params )

finalprotected

Definition at line 544 of file FileBackendStore.php.

References $dir, $status, as, deleteContainerCache(), directoriesAreVirtual(), doCleanInternal(), getContainerSuffixes(), FileBackend\getScopedFileLocks(), FileBackend\getTopDirectoryList(), Profiler\instance(), list, LockManager\LOCK_EX, Status\newGood(), resolveStoragePath(), and wfDebug().

FileBackendStore::doCleanInternal	(		$container,
			$dir,
		array	$params
	)

protected

See Also: FileBackendStore::doClean()

Parameters

string	$container
string	$dir
array	$params

Returns: Status

Definition at line 596 of file FileBackendStore.php.

References Status\newGood().

Referenced by doClean().

FileBackendStore::doClearCache ( array $paths = null )

protected

Clears any additional stat caches for storage paths.

See Also: FileBackend::clearCache()

Parameters

array $paths Storage paths (optional)

Definition at line 1295 of file FileBackendStore.php.

Referenced by clearCache().

FileBackendStore::doConcatenate ( array $params )

protected

See Also: FileBackendStore::concatenate()

Parameters

array $params

Returns: Status

Definition at line 371 of file FileBackendStore.php.

References $path, $status, as, FileBackend\getLocalReference(), getLocalReferenceMulti(), and Status\newGood().

Referenced by concatenate().

FileBackendStore::doCopyInternal ( array $params )

abstractprotected

See Also: FileBackendStore::copyInternal()

Parameters

array $params

Returns: Status

Referenced by copyInternal().

FileBackendStore::doCreateInternal ( array $params )

abstractprotected

See Also: FileBackendStore::createInternal()

Parameters

array $params

Returns: Status

Referenced by createInternal().

FileBackendStore::doDeleteInternal ( array $params )

abstractprotected

See Also: FileBackendStore::deleteInternal()

Parameters

array $params

Returns: Status

Referenced by deleteInternal().

FileBackendStore::doDescribeInternal ( array $params )

protected

See Also: FileBackendStore::describeInternal()

Parameters

array $params

Returns: Status

Definition at line 331 of file FileBackendStore.php.

References Status\newGood().

Referenced by describeInternal().

FileBackendStore::doDirectoryExists	(		$container,
			$dir,
		array	$params
	)

abstractprotected

See Also: FileBackendStore::directoryExists()

Parameters

string	$container	Resolved container name
string	$dir	Resolved path relative to container
array	$params

Returns: bool|null

Referenced by directoryExists().

FileBackendStore::doExecuteOpHandlesInternal ( array $fileOpHandles )

protected

See Also: FileBackendStore::executeOpHandlesInternal()

Parameters

FileBackendStoreOpHandle[] $fileOpHandles

Exceptions

FileBackendError

Returns: Status[] List of corresponding Status objects

Definition at line 1221 of file FileBackendStore.php.

Referenced by executeOpHandlesInternal().

FileBackendStore::doGetFileContentsMulti ( array $params )

protected

See Also: FileBackendStore::getFileContentsMulti()

Parameters

array $params

Returns: array

Definition at line 691 of file FileBackendStore.php.

References $path, as, and doGetLocalReferenceMulti().

Referenced by getFileContentsMulti().

FileBackendStore::doGetFileSha1Base36 ( array $params )

protected

See Also: FileBackendStore::getFileSha1Base36()

Parameters

array $params

Returns: bool|string

Definition at line 758 of file FileBackendStore.php.

References FileBackend\getLocalReference().

Referenced by getFileSha1Base36().

FileBackendStore::doGetFileStat ( array $params )

abstractprotected

See Also: FileBackendStore::getFileStat()

Referenced by getFileStat().

FileBackendStore::doGetFileStatMulti ( array $params )

protected

Get file stat information (concurrently if possible) for several files.

See Also: FileBackend::getFileStat()

Parameters

array

$params

Parameters include:

srcs : list of source storage paths
latest : use the latest available data

Returns: array|null Map of storage paths to array|bool|null (returns null if not supported)

Since: 1.23

Definition at line 1356 of file FileBackendStore.php.

Referenced by preloadFileStat().

FileBackendStore::doGetFileXAttributes ( array $params )

protected

See Also: FileBackendStore::getFileXAttributes()

Returns: bool|string

Definition at line 728 of file FileBackendStore.php.

Referenced by getFileXAttributes().

FileBackendStore::doGetLocalCopyMulti ( array $params )

abstractprotected

See Also: FileBackendStore::getLocalCopyMulti()

Parameters

array $params

Returns: array

Referenced by doGetLocalReferenceMulti(), and getLocalCopyMulti().

FileBackendStore::doGetLocalReferenceMulti ( array $params )

protected

See Also: FileBackendStore::getLocalReferenceMulti()

Parameters

array $params

Returns: array

Definition at line 814 of file FileBackendStore.php.

References doGetLocalCopyMulti().

Referenced by doGetFileContentsMulti(), and getLocalReferenceMulti().

FileBackendStore::doMoveInternal ( array $params )

protected

See Also: FileBackendStore::moveInternal()

Parameters

array $params

Returns: Status

Definition at line 284 of file FileBackendStore.php.

References $status, copyInternal(), deleteInternal(), and FileBackend\normalizeStoragePath().

Referenced by moveInternal().

FileBackendStore::doOperationsInternal	(	array	$ops,
		array	$opts
	)

finalprotected

Definition at line 1061 of file FileBackendStore.php.

References $status, as, FileOpBatch\attempt(), clearCache(), FormatJson\encode(), getOperationsInternal(), getPathsToLockForOpsInternal(), FileBackend\getScopedFileLocks(), Profiler\instance(), name, Status\newFatal(), Status\newGood(), preloadFileStat(), primeContainerCache(), setConcurrencyFlags(), and wfDebugLog().

FileBackendStore::doPrepare ( array $params )

finalprotected

Definition at line 439 of file FileBackendStore.php.

References $dir, $status, as, doPrepareInternal(), getContainerSuffixes(), Profiler\instance(), list, Status\newGood(), resolveStoragePath(), and wfDebug().

FileBackendStore::doPrepareInternal	(		$container,
			$dir,
		array	$params
	)

protected

See Also: FileBackendStore::doPrepare()

Parameters

string	$container
string	$dir
array	$params

Returns: Status

Definition at line 470 of file FileBackendStore.php.

References Status\newGood().

Referenced by doPrepare().

FileBackendStore::doPrimeContainerCache ( array $containerInfo )

protected

Fill the backend-specific process cache given an array of resolved container names and their corresponding cached info.

Only containers that actually exist should appear in the map.

Parameters

array $containerInfo Map of resolved container names to cached info

Definition at line 1679 of file FileBackendStore.php.

Referenced by primeContainerCache().

FileBackendStore::doPublish ( array $params )

finalprotected

Definition at line 509 of file FileBackendStore.php.

References $dir, $status, as, doPublishInternal(), getContainerSuffixes(), Profiler\instance(), list, Status\newGood(), resolveStoragePath(), and wfDebug().

FileBackendStore::doPublishInternal	(		$container,
			$dir,
		array	$params
	)

protected

See Also: FileBackendStore::doPublish()

Parameters

string	$container
string	$dir
array	$params

Returns: Status

Definition at line 540 of file FileBackendStore.php.

References Status\newGood().

Referenced by doPublish().

FileBackendStore::doQuickOperationsInternal ( array $ops )

finalprotected

Definition at line 1128 of file FileBackendStore.php.

References FileBackend\$concurrency, $params, $status, as, clearCache(), executeOpHandlesInternal(), Profiler\instance(), and Status\newGood().

FileBackendStore::doSecure ( array $params )

finalprotected

Definition at line 474 of file FileBackendStore.php.

References $dir, $status, as, doSecureInternal(), getContainerSuffixes(), Profiler\instance(), list, Status\newGood(), resolveStoragePath(), and wfDebug().

FileBackendStore::doSecureInternal	(		$container,
			$dir,
		array	$params
	)

protected

See Also: FileBackendStore::doSecure()

Parameters

string	$container
string	$dir
array	$params

Returns: Status

Definition at line 505 of file FileBackendStore.php.

References Status\newGood().

Referenced by doSecure().

FileBackendStore::doStoreInternal ( array $params )

abstractprotected

See Also: FileBackendStore::storeInternal()

Parameters

array $params

Returns: Status

Referenced by storeInternal().

FileBackendStore::doStreamFile ( array $params )

protected

See Also: FileBackendStore::streamFile()

Parameters

array $params

Returns: Status

Definition at line 868 of file FileBackendStore.php.

References $flags, $res, $status, FileBackend\getLocalReference(), Status\newGood(), StreamFile\send404Message(), StreamFile\stream(), StreamFile\STREAM_ALLOW_OB, and StreamFile\STREAM_HEADLESS.

Referenced by streamFile().

FileBackendStore::executeOpHandlesInternal ( array $fileOpHandles )

final

Execute a list of FileBackendStoreOpHandle handles in parallel.

The resulting Status object fields will correspond to the order in which the handles where given.

Parameters

FileBackendStoreOpHandle[] $fileOpHandles

Exceptions

FileBackendError

Returns: array Map of Status objects

Definition at line 1195 of file FileBackendStore.php.

References $res, as, doExecuteOpHandlesInternal(), FileBackend\getName(), and Profiler\instance().

Referenced by doQuickOperationsInternal().

FileBackendStore::fileCacheKey ( $path )

private

Get the cache key for a file path.

Parameters

string $path Normalized storage path

Returns: string

Definition at line 1688 of file FileBackendStore.php.

References $path.

Referenced by primeFileCache(), and setFileCache().

FileBackendStore::fileExists ( array $params )

final

Definition at line 600 of file FileBackendStore.php.

References getFileStat(), and Profiler\instance().

Referenced by SwiftFileBackend\doStreamFile().

FileBackendStore::fullContainerName ( $container )

finalprotected

Get the full container name, including the wiki ID prefix.

Parameters

string $container

Returns: string

Definition at line 1567 of file FileBackendStore.php.

Referenced by resolveStoragePath().

FileBackendStore::getContainerHashLevels ( $container )

finalprotected

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.

Parameters

string $container

Returns: array (integer levels, integer base, repeat flag) or (0, 0, false)

Definition at line 1527 of file FileBackendStore.php.

References false.

Referenced by getContainerShard(), and getContainerSuffixes().

FileBackendStore::getContainerShard	(	$container,
		$relPath
	)

finalprotected

Get the container name shard suffix for a given path.

Any empty suffix means the container is not sharded.

Parameters

string	$container	Container name
string	$relPath	Storage path relative to the container

Returns: string|null Returns null if shard could not be determined

Definition at line 1475 of file FileBackendStore.php.

References $base, getContainerHashLevels(), and list.

Referenced by resolveStoragePath().

FileBackendStore::getContainerSuffixes ( $container )

finalprotected

Get a list of full container shard suffixes for a container.

Parameters

string $container

Returns: array

Definition at line 1548 of file FileBackendStore.php.

References $base, getContainerHashLevels(), and list.

Referenced by directoryExists(), doClean(), doPrepare(), doPublish(), doSecure(), getDirectoryList(), and getFileList().

FileBackendStore::getContentType	(	$storagePath,
		$content,
		$fsPath
	)

protected

Get the content type to use in HEAD/GET requests for a file.

Parameters

string	$storagePath
string \| null	$content	File data
string \| null	$fsPath	File system path

Returns: string MIME type

Definition at line 1827 of file FileBackendStore.php.

References $mime.

Referenced by SwiftFileBackend\doCreateInternal(), and SwiftFileBackend\doStoreInternal().

FileBackendStore::getDirectoryList ( array $params )

final

Definition at line 927 of file FileBackendStore.php.

References $dir, getContainerSuffixes(), getDirectoryListInternal(), list, resolveStoragePath(), and wfDebug().

FileBackendStore::getDirectoryListInternal	(		$container,
			$dir,
		array	$params
	)

abstract

Do not call this function from places outside FileBackend.

See Also: FileBackendStore::getDirectoryList()

Parameters

string	$container	Resolved container name
string	$dir	Resolved path relative to container
array	$params

Returns: Traversable|array|null Returns null on failure

Referenced by getDirectoryList().

FileBackendStore::getFileContentsMulti ( array $params )

Definition at line 677 of file FileBackendStore.php.

References doGetFileContentsMulti(), Profiler\instance(), and setConcurrencyFlags().

FileBackendStore::getFileHttpUrl ( array $params )

See Also: FileBackend::getFileHttpUrl()

Parameters

array $params

Returns: string|null

Definition at line 839 of file FileBackendStore.php.

FileBackendStore::getFileList ( array $params )

final

Definition at line 957 of file FileBackendStore.php.

References $dir, getContainerSuffixes(), getFileListInternal(), list, resolveStoragePath(), and wfDebug().

FileBackendStore::getFileListInternal	(		$container,
			$dir,
		array	$params
	)

abstract

Do not call this function from places outside FileBackend.

See Also: FileBackendStore::getFileList()

Parameters

string	$container	Resolved container name
string	$dir	Resolved path relative to container
array	$params

Returns: Traversable|array|null Returns null on failure

Referenced by getFileList().

FileBackendStore::getFileProps ( array $params )

final

Definition at line 767 of file FileBackendStore.php.

References FileBackend\getLocalReference(), Profiler\instance(), and FSFile\placeholderProps().

FileBackendStore::getFileSha1Base36 ( array $params )

final

Definition at line 732 of file FileBackendStore.php.

References $path, doGetFileSha1Base36(), and Profiler\instance().

FileBackendStore::getFileSize ( array $params )

final

Definition at line 614 of file FileBackendStore.php.

References getFileStat(), and Profiler\instance().

FileBackendStore::getFileStat ( array $params )

final

Definition at line 621 of file FileBackendStore.php.

References $path, doGetFileStat(), Profiler\instance(), primeFileCache(), setFileCache(), and wfDebug().

Referenced by SwiftFileBackend\doDescribeInternal(), SwiftFileBackend\doGetFileSha1base36(), SwiftFileBackend\doGetFileXAttributes(), fileExists(), getFileSize(), and getFileTimestamp().

FileBackendStore::getFileTimestamp ( array $params )

final

Definition at line 607 of file FileBackendStore.php.

References getFileStat(), and Profiler\instance().

FileBackendStore::getFileXAttributes ( array $params )

final

Definition at line 702 of file FileBackendStore.php.

References $path, doGetFileXAttributes(), and Profiler\instance().

FileBackendStore::getLocalCopyMulti ( array $params )

final

Definition at line 818 of file FileBackendStore.php.

References doGetLocalCopyMulti(), Profiler\instance(), and setConcurrencyFlags().

FileBackendStore::getLocalReferenceMulti ( array $params )

final

Definition at line 775 of file FileBackendStore.php.

References $path, as, doGetLocalReferenceMulti(), Profiler\instance(), and setConcurrencyFlags().

Referenced by doConcatenate().

FileBackendStore::getOperationsInternal ( array $ops )

final

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.

Parameters

array $ops Same format as doOperations()

Returns: array List of FileOp objects

Exceptions

FileBackendError

Definition at line 998 of file FileBackendStore.php.

References $params, and as.

Referenced by doOperationsInternal(), and getScopedLocksForOps().

FileBackendStore::getPathsToLockForOpsInternal ( array $performOps )

final

Get a list of storage paths to lock for a list of operations Returns an array with LockManager::LOCK_UW (shared locks) and LockManager::LOCK_EX (exclusive locks) keys, each corresponding to a list of storage paths to be locked.

All returned paths are normalized.

Parameters

array $performOps List of FileOp objects

Returns: array (LockManager::LOCK_UW => path list, LockManager::LOCK_EX => path list)

Definition at line 1037 of file FileBackendStore.php.

References as, LockManager\LOCK_EX, and LockManager\LOCK_UW.

Referenced by doOperationsInternal(), and getScopedLocksForOps().

FileBackendStore::getScopedLocksForOps	(	array	$ops,
		Status	$status
	)

Definition at line 1055 of file FileBackendStore.php.

References getOperationsInternal(), getPathsToLockForOpsInternal(), and FileBackend\getScopedFileLocks().

FileBackendStore::isPathUsableInternal ( $storagePath )

abstract

Check if a file can be created or changed at a given storage path.

FS backends should check if the parent directory exists, files can be written under it, and that any file already there is writable. Backends using key/value stores should check if the container exists.

Parameters

string $storagePath

Returns: bool

FileBackendStore::isSingleShardPathInternal ( $storagePath )

final

Check if a storage path maps to a single shard.

Container dirs like "a", where the container shards on "x/xy", can reside on several shards. Such paths are tricky to handle.

Parameters

string $storagePath Storage path

Returns: bool

Definition at line 1513 of file FileBackendStore.php.

References list, and resolveStoragePath().

static FileBackendStore::isValidContainerName ( $container )

staticfinalprotected

Check if a full container name is valid.

This checks for length and illegal characters. Limiting the characters makes migrations to other stores easier.

Parameters

string $container

Returns: bool

Definition at line 1396 of file FileBackendStore.php.

static FileBackendStore::isValidShortContainerName ( $container )

staticfinalprotected

Check if a short container name is valid.

This checks for length and illegal characters. This may disallow certain characters that can appear in the prefix used to make the full container name.

Parameters

string $container

Returns: bool

Definition at line 1379 of file FileBackendStore.php.

FileBackendStore::maxFileSizeInternal ( )

final

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.

Returns: int Bytes

Definition at line 85 of file FileBackendStore.php.

References $maxFileSize.

Referenced by createInternal(), and storeInternal().

FileBackendStore::moveInternal ( array $params )

final

Move a file from one storage path to another in the backend.

This will overwrite any file that exists at the destination. Do not call this function from places outside FileBackend and FileOp.

$params include:

src : source storage path
dst : destination storage path
ignoreMissingSource : do nothing if the source file does not exist
headers : HTTP header name/value map
async : Status will be returned immediately if supported. If the status is OK, then its value field will be set to a FileBackendStoreOpHandle object.
dstExists : Whether a file exists at the destination (optimization). Callers can use "false" if no existing file is being changed.

Parameters

array $params

Returns: Status

Definition at line 267 of file FileBackendStore.php.

References $status, clearCache(), deleteFileCache(), doMoveInternal(), and Profiler\instance().

static FileBackendStore::normalizeXAttributes ( array $xattr )

staticfinalprotected

Normalize file headers/metadata to the FileBackend::getFileXAttributes() format.

Parameters

array $xattr

Returns: array

Since: 1.22

Definition at line 1784 of file FileBackendStore.php.

References FileBackend\$name, $value, and as.

FileBackendStore::nullInternal ( array $params )

final

No-op file operation that does nothing.

Do not call this function from places outside FileBackend and FileOp.

Parameters

array $params

Returns: Status

Definition at line 342 of file FileBackendStore.php.

References Status\newGood().

FileBackendStore::preloadCache ( array $paths )

final

Definition at line 1260 of file FileBackendStore.php.

References $path, as, list, primeContainerCache(), primeFileCache(), and resolveStoragePath().

FileBackendStore::preloadFileStat ( array $params )

final

Definition at line 1298 of file FileBackendStore.php.

References $path, $success, as, doGetFileStatMulti(), Profiler\instance(), FileBackend\normalizeStoragePath(), setFileCache(), and wfDebug().

Referenced by doOperationsInternal().

FileBackendStore::primeContainerCache ( array $items )

finalprotected

Do a batch lookup from cache for container stats for all containers used in a list of container names or storage paths objects.

This loads the persistent cache values into the process cache.

Parameters

array $items

Definition at line 1640 of file FileBackendStore.php.

References $path, as, containerCacheKey(), doPrimeContainerCache(), Profiler\instance(), list, and resolveStoragePath().

Referenced by doOperationsInternal(), SwiftFileBackend\getContainerStat(), and preloadCache().

FileBackendStore::primeFileCache ( array $items )

finalprotected

Do a batch lookup from cache for file stats for all paths used in a list of storage paths or FileOp objects.

This loads the persistent cache values into the process cache.

Parameters

array $items List of storage paths

Definition at line 1737 of file FileBackendStore.php.

References $path, as, fileCacheKey(), Profiler\instance(), list, FileBackend\normalizeStoragePath(), and resolveStoragePath().

Referenced by getFileStat(), and preloadCache().

FileBackendStore::resolveContainerName ( $container )

protected

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.

Parameters

string $container

Returns: string|null

Definition at line 1583 of file FileBackendStore.php.

Referenced by resolveStoragePath().

FileBackendStore::resolveContainerPath	(	$container,
		$relStoragePath
	)

protected

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).

Parameters

string	$container	Container name
string	$relStoragePath	Storage path relative to the container

Returns: string|null Path or null if not valid

Definition at line 1597 of file FileBackendStore.php.

Referenced by resolveStoragePath().

FileBackendStore::resolveStoragePath ( $storagePath )

finalprotected

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.

Parameters

string $storagePath

Returns: array (container, path, container suffix) or (null, null, null) if invalid

Definition at line 1417 of file FileBackendStore.php.

References fullContainerName(), getContainerShard(), list, name, resolveContainerName(), and resolveContainerPath().

Referenced by directoryExists(), doClean(), doPrepare(), doPublish(), doSecure(), getDirectoryList(), getFileList(), isSingleShardPathInternal(), preloadCache(), primeContainerCache(), primeFileCache(), and resolveStoragePathReal().

FileBackendStore::resolveStoragePathReal ( $storagePath )

finalprotected

Like resolveStoragePath() except null values are returned if the container is sharded and the shard could not be determined or if the path ends with '/'.

The later case is illegal for FS backends and can confuse listings for object store backends.

This function is used when resolving paths that must be valid locations for files. Directory and listing functions should generally just use resolveStoragePath() instead.

See Also: FileBackendStore::resolveStoragePath()

Parameters

string $storagePath

Returns: array (container, path) or (null, null) if invalid

Definition at line 1458 of file FileBackendStore.php.

References list, and resolveStoragePath().

FileBackendStore::sanitizeOpHeaders ( array $op )

protected

Normalize and filter HTTP headers from a file operation.

This normalizes and strips long HTTP headers from a file operation. Most headers are just numbers, but some are allowed to be long. This function is useful for cleaning up headers and avoiding backend specific errors, especially in the middle of batch file operations.

Parameters

array $op Same format as doOperation()

Returns: array

Definition at line 1240 of file FileBackendStore.php.

References FileBackend\$name, $value, and as.

FileBackendStore::setConcurrencyFlags ( array $opts )

finalprotected

Set the 'concurrency' option from a list of operation options.

Parameters

array $opts Map of operation options

Returns: array

Definition at line 1804 of file FileBackendStore.php.

References FileBackend\$concurrency.

Referenced by doOperationsInternal(), getFileContentsMulti(), getLocalCopyMulti(), and getLocalReferenceMulti().

FileBackendStore::setContainerCache	(		$container,
		array	$val
	)

finalprotected

Set the cached info for a container.

Parameters

string	$container	Resolved container name
array	$val	Information to cache

Definition at line 1617 of file FileBackendStore.php.

References containerCacheKey().

Referenced by SwiftFileBackend\getContainerStat().

FileBackendStore::setFileCache	(		$path,
		array	$val
	)

finalprotected

Set the cached stat info for a file path.

Negatives (404s) are not cached. By not caching negatives, we can skip cache salting for the case when a file is created at a path were there was none before.

Parameters

string	$path	Storage path
array	$val	Stat information to cache

Definition at line 1700 of file FileBackendStore.php.

References $path, fileCacheKey(), FileBackend\normalizeStoragePath(), TS_UNIX, and wfTimestamp().

Referenced by getFileStat(), and preloadFileStat().

FileBackendStore::storeInternal ( array $params )

final

Store a file into the backend from a file on disk.

This will overwrite any file that exists at the destination. Do not call this function from places outside FileBackend and FileOp.

$params include:

src : source path on disk
dst : destination storage path
headers : HTTP header name/value map
async : Status will be returned immediately if supported. If the status is OK, then its value field will be set to a FileBackendStoreOpHandle object.
dstExists : Whether a file exists at the destination (optimization). Callers can use "false" if no existing file is being changed.

Parameters

array $params

Returns: Status

Definition at line 159 of file FileBackendStore.php.

References $status, clearCache(), deleteFileCache(), doStoreInternal(), Profiler\instance(), maxFileSizeInternal(), and Status\newFatal().

FileBackendStore::streamFile ( array $params )

final

Definition at line 843 of file FileBackendStore.php.

References $status, doStreamFile(), Profiler\instance(), Status\newGood(), and print.

Member Data Documentation

ProcessCacheLRU FileBackendStore::$cheapCache

protected

Map of paths to small (RAM/disk) cache items.

Definition at line 42 of file FileBackendStore.php.

ProcessCacheLRU FileBackendStore::$expensiveCache

protected

Map of paths to large (RAM/disk) cache items.

Definition at line 44 of file FileBackendStore.php.

FileBackendStore::$maxFileSize = 4294967296

protected

Definition at line 52 of file FileBackendStore.php.

Referenced by maxFileSizeInternal().

WANObjectCache FileBackendStore::$memCache

protected

Definition at line 40 of file FileBackendStore.php.

callable FileBackendStore::$mimeCallback

protected

Method to get the MIME type of files.

Definition at line 50 of file FileBackendStore.php.

array FileBackendStore::$shardViaHashLevels = []

protected

Map of container names to sharding config.

Definition at line 47 of file FileBackendStore.php.

const FileBackendStore::CACHE_CHEAP_SIZE = 500

Definition at line 55 of file FileBackendStore.php.

const FileBackendStore::CACHE_EXPENSIVE_SIZE = 5

Definition at line 56 of file FileBackendStore.php.

const FileBackendStore::CACHE_TTL = 10

Definition at line 54 of file FileBackendStore.php.

The documentation for this class was generated from the following file:

includes/filebackend/FileBackendStore.php

Public Member Functions

Public Attributes

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation