Proxy backend that manages file layout rewriting for FileRepo. More...

Collaboration diagram for FileBackendDBRepoWrapper:

[legend]

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

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

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

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

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

	getBackendPath ( $path, $latest=true)
	Translate a legacy "title" path to its "sha1" counterpart.

	getBackendPaths (array $paths, $latest=true)
	Translate legacy "title" paths to their "sha1" counterparts.

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

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

	getFileContentsMulti (array $params)
	Like getFileContents() except it takes an array of storage paths and returns an order preserved map of storage paths to their content.

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

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

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

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

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

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

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

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

	getInternalBackend ()
	Get the underlying FileBackend that is being wrapped.

	getLocalCopyMulti (array $params)
	Like getLocalCopy() except it takes an array of storage paths and yields an order preserved-map of storage paths to temporary local file copies.

	getLocalReferenceMulti (array $params)
	Like getLocalReference() except it takes an array of storage paths and yields an order-preserved map of storage paths to temporary local file copies.

	getPathForSHA1 ( $sha1)
	Get the ultimate original storage path for a file.

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

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

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

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

Public Member Functions inherited from FileBackend
	clean (array $params)
	Delete a storage directory if it is empty.

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

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

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

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

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

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

	doQuickOperation (array $op, array $opts=[])
	Same as doQuickOperations() except it takes a single operation.

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

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

	getDomainId ()
	Get the domain identifier used for this backend (possibly empty).

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

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

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

	getName ()
	Get the unique backend name.

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

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

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

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

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

	getWikiId ()
	Alias to getDomainId()

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

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

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

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

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

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

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

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

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

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

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

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

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

	setLogger (LoggerInterface $logger)

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

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

Protected Member Functions
	doClean (array $params)

	doOperationsInternal (array $ops, array $opts)

	doPrepare (array $params)

	doPublish (array $params)

	doQuickOperationsInternal (array $ops, array $opts)

	doSecure (array $params)

	getDB ( $index)
	Get a connection to the repo file registry DB.

	mungeOpPaths (array $ops)
	Translate legacy "title" source paths to their "sha1" counterparts.

	translateArrayResults ( $function, array $params)
	Translates paths when the backend function returns results keyed by paths.

	translateSrcParams ( $function, array $params)
	Translates paths found in the "src" or "srcs" keys of a params array.

Protected Member Functions inherited from FileBackend
	newStatus (... $args)
	Yields the result of the status wrapper callback on either:

	resetOutputBuffer ()

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

	scopedProfileSection ( $section)

	wrapStatus (StatusValue $sv)

Protected Attributes
FileBackend	$backend

Closure	$dbHandleFunc

DBConnRef[]	$dbs

string	$repoName

MapCacheLRU	$resolvedPathCache

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

string	$domainId
	Unique domain name.

LockManager	$lockManager

LoggerInterface	$logger

string	$name
	Unique backend name.

callable	$obResetFunc

string	$parallelize
	When to do operations in parallel.

callable null	$profiler

string	$readOnly
	Read-only explanation message.

callable null	$statusWrapper

callable null	$streamMimeFunc

TempFSFileFactory	$tmpFileFactory

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.

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

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

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

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

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

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

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

const	ATTR_METADATA = 2

const	ATTR_UNICODE_PATHS = 4

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

Detailed Description

Proxy backend that manages file layout rewriting for FileRepo.

LocalRepo may be configured to store files under their title names or by SHA-1. This acts as a shim in the latter case, providing backwards compatability for most callers. All "public"/"deleted" zone files actually go in an "original" container and are never changed.

This requires something like thumb_handler.php and img_auth.php for client viewing of files.

Since: 1.25

Definition at line 38 of file FileBackendDBRepoWrapper.php.

Constructor & Destructor Documentation

◆ __construct()

FileBackendDBRepoWrapper::__construct ( array $config )

Create a new backend instance from configuration.

This should only be called from within FileBackendGroup.

Stability: stable: to call

Parameters

array

$config

Parameters include:

name : The unique name of this backend. This should consist of alphanumberic, '-', and '_' characters. This name should not be changed after use. Note that the name is not used in actual container names.
domainId : Prefix to container names that is unique to this backend. It should only consist of alphanumberic, '-', and '_' characters. This ID is what avoids collisions if multiple logical backends use the same storage system, so this should be set carefully.
lockManager : LockManager object to use for any file locking. If not provided, then no file locking will be enforced.
readOnly : Write operations are disallowed if this is a non-empty string. It should be an explanation for the backend being read-only.
parallelize : When to do file operations in parallel (when possible). Allowed values are "implicit", "explicit" and "off".
concurrency : How many file operations can be done in parallel.
tmpDirectory : Directory to use for temporary files.
tmpFileFactory : Optional TempFSFileFactory object. Only has an effect if tmpDirectory is not set. If both are unset or null, then the backend will try to discover a usable temporary directory.
obResetFunc : alternative callback to clear the output buffer
streamMimeFunc : alternative method to determine the content type from the path
logger : Optional PSR logger object.
profiler : Optional callback that takes a section name argument and returns a ScopedCallback instance that ends the profile section in its destructor.
statusWrapper : Optional callback that is used to wrap returned StatusValues

Exceptions

InvalidArgumentException

Reimplemented from FileBackend.

Definition at line 50 of file FileBackendDBRepoWrapper.php.

References $backend, FileBackend\getDomainId(), and FileBackend\getName().

Member Function Documentation

◆ clearCache()

FileBackendDBRepoWrapper::clearCache ( array $paths = null )

Invalidate any in-process file stat and property cache.

If $paths is given, then only the cache for those files will be cleared.

See also: FileBackend::getFileStat()

Parameters

array | null $paths Storage paths (optional)

Reimplemented from FileBackend.

Definition at line 248 of file FileBackendDBRepoWrapper.php.

◆ concatenate()

FileBackendDBRepoWrapper::concatenate ( array $params )

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.

Parameters

array

$params

Operation parameters, include:

srcs : ordered source storage paths (e.g. chunk1, chunk2, ...)
dst : file system path to 0-byte temp file
parallelize : try to do operations in parallel when possible

Returns: StatusValue

Reimplemented from FileBackend.

Definition at line 172 of file FileBackendDBRepoWrapper.php.

References $params, and translateSrcParams().

◆ directoryExists()

FileBackendDBRepoWrapper::directoryExists ( array $params )

Check if a directory exists at a given storage path.

For backends using key/value stores, a directory is said to exist whenever there exist any files with paths using the given directory path as a prefix followed by a forward slash. For example, if there is a file called "mwstore://backend/container/dir/path.svg" then directories are said to exist at "mwstore://backend/container" and "mwstore://backend/container/dir". These can be thought of as "virtual" directories.

Backends that directly use a filesystem layer might enumerate empty directories. The clean() method should always be used when files are deleted or moved if this is a concern. This is a trade-off to avoid write amplication/contention on file changes or read amplification when calling this method.

Storage backends with eventual consistency might return stale data.

See also: FileBackend::EXISTENCE_ERROR; FileBackend::clean()

Parameters

array

$params

Parameters include:

dir : storage directory

Returns: bool|null Whether a directory exists or null (I/O error)

Since: 1.20

Reimplemented from FileBackend.

Definition at line 232 of file FileBackendDBRepoWrapper.php.

References $params.

◆ doClean()

FileBackendDBRepoWrapper::doClean ( array $params )

protected

See also: FileBackend::clean()

Parameters

array $params

Returns: StatusValue

Reimplemented from FileBackend.

Definition at line 168 of file FileBackendDBRepoWrapper.php.

References $params.

◆ doOperationsInternal()

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

protected

See also: FileBackend::doOperations()

Parameters

array	$ops
array	$opts

Returns: StatusValue

Reimplemented from FileBackend.

Definition at line 148 of file FileBackendDBRepoWrapper.php.

References mungeOpPaths().

◆ doPrepare()

FileBackendDBRepoWrapper::doPrepare ( array $params )

protected

See also: FileBackend::prepare()

Parameters

array $params

Returns: StatusValue Good status without value for success, fatal otherwise.

Reimplemented from FileBackend.

Definition at line 156 of file FileBackendDBRepoWrapper.php.

References $params.

◆ doPublish()

FileBackendDBRepoWrapper::doPublish ( array $params )

protected

See also: FileBackend::publish()

Parameters

array $params

Returns: StatusValue

Reimplemented from FileBackend.

Definition at line 164 of file FileBackendDBRepoWrapper.php.

References $params.

◆ doQuickOperationsInternal()

FileBackendDBRepoWrapper::doQuickOperationsInternal	(	array	$ops,
		array	$opts )

protected

See also: FileBackend::doQuickOperations()

Parameters

array	$ops
array	$opts

Returns: StatusValue

Since: 1.20

Reimplemented from FileBackend.

Definition at line 152 of file FileBackendDBRepoWrapper.php.

References mungeOpPaths().

◆ doSecure()

FileBackendDBRepoWrapper::doSecure ( array $params )

protected

See also: FileBackend::secure()

Parameters

array $params

Returns: StatusValue

Reimplemented from FileBackend.

Definition at line 160 of file FileBackendDBRepoWrapper.php.

References $params.

◆ fileExists()

FileBackendDBRepoWrapper::fileExists ( 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.

Callers that only care if a file is readily accessible can use non-strict comparisons on the result. If "does not exist" and "existence is unknown" must be distinguished, then strict comparisons to true/null should be used.

See also: FileBackend::EXISTENCE_ERROR; FileBackend::directoryExists()

Parameters

array

$params

Parameters include:

src : source storage path
latest : use the latest available data

Returns: bool|null Whether the file exists or null (I/O error)

Reimplemented from FileBackend.

Definition at line 176 of file FileBackendDBRepoWrapper.php.

References $params, and translateSrcParams().

◆ getBackendPath()

FileBackendDBRepoWrapper::getBackendPath	(		$path,
			$latest = true )

Translate a legacy "title" path to its "sha1" counterpart.

E.g. mwstore://local-backend/local-public/a/ab/<name>.jpg => mwstore://local-backend/local-original/x/y/z/<sha1>.jpg

Parameters

string	$path
bool	$latest

Returns: string

Definition at line 81 of file FileBackendDBRepoWrapper.php.

References $path, and getBackendPaths().

Referenced by mungeOpPaths(), and translateSrcParams().

◆ getBackendPaths()

FileBackendDBRepoWrapper::getBackendPaths	(	array	$paths,
			$latest = true )

Translate legacy "title" paths to their "sha1" counterparts.

E.g. mwstore://local-backend/local-public/a/ab/<name>.jpg => mwstore://local-backend/local-original/x/y/z/<sha1>.jpg

Parameters

string[]	$paths
bool	$latest

Returns: string[] Translated paths in same order

Definition at line 96 of file FileBackendDBRepoWrapper.php.

References FileBackend\$name, $path, DB_PRIMARY, DB_REPLICA, getDB(), getPathForSHA1(), and FileBackend\splitStoragePath().

Referenced by getBackendPath(), mungeOpPaths(), preloadCache(), translateArrayResults(), and translateSrcParams().

◆ getDB()

FileBackendDBRepoWrapper::getDB ( $index )

protected

Get a connection to the repo file registry DB.

Parameters

int $index

Returns: DBConnRef

Definition at line 287 of file FileBackendDBRepoWrapper.php.

References $dbHandleFunc.

◆ getDirectoryList()

FileBackendDBRepoWrapper::getDirectoryList ( array $params )

Get an iterator to list all directories under a storage directory.

If the directory is of the form "mwstore://backend/container", then all directories in the container will be listed. If the directory is of form "mwstore://backend/container/dir", then all directories directly under that directory will be listed. Results will be storage directories relative to the given directory.

Storage backends with eventual consistency might return stale data.

Failures during iteration can result in FileBackendError exceptions (since 1.22).

See also: FileBackend::LIST_ERROR; FileBackend::directoryExists()

Parameters

array

$params

Parameters include:

dir : storage directory
topOnly : only return direct child dirs of the directory

Returns: Traversable|array|null Directory list enumerator or null (initial I/O error)

Since: 1.20

Reimplemented from FileBackend.

Definition at line 236 of file FileBackendDBRepoWrapper.php.

References $params.

◆ getFeatures()

FileBackendDBRepoWrapper::getFeatures ( )

Get the a bitfield of extra features supported by the backend medium.

Stability: stable: to override

Returns: int Bitfield of FileBackend::ATTR_* flags

Since: 1.23

Reimplemented from FileBackend.

Definition at line 244 of file FileBackendDBRepoWrapper.php.

◆ getFileContentsMulti()

FileBackendDBRepoWrapper::getFileContentsMulti ( array $params )

Like getFileContents() except it takes an array of storage paths and returns an order preserved map of storage paths to their content.

See also: FileBackend::getFileContents()

Parameters

array

$params

Parameters include:

srcs : list of source storage paths
latest : use the latest available data
parallelize : try to do operations in parallel when possible

Returns: string[]|false[] Map of (path name => file content or false on failure)

Since: 1.20

Reimplemented from FileBackend.

Definition at line 216 of file FileBackendDBRepoWrapper.php.

References $params, and translateArrayResults().

◆ getFileHttpUrl()

FileBackendDBRepoWrapper::getFileHttpUrl ( array $params )

Return an HTTP URL to a given file that requires no authentication to use.

The URL may be pre-authenticated (via some token in the URL) and temporary. This will return null if the backend cannot make an HTTP URL for the file.

This is useful for key/value stores when using scripts that seek around large files and those scripts (and the backend) support HTTP Range headers. Otherwise, one would need to use getLocalReference(), which involves loading the entire file on to local disk.

See also: FileBackend::TEMPURL_ERROR

Parameters

array

$params

Parameters include:

src : source storage path
ttl : lifetime (seconds) if pre-authenticated; default is 1 day

Returns: string|null URL or null (not supported or I/O error)

Since: 1.21

Reimplemented from FileBackend.

Definition at line 228 of file FileBackendDBRepoWrapper.php.

References $params, and translateSrcParams().

◆ getFileList()

FileBackendDBRepoWrapper::getFileList ( array $params )

Get an iterator to list all stored files under a storage directory.

If the directory is of the form "mwstore://backend/container", then all files in the container will be listed. If the directory is of form "mwstore://backend/container/dir", then all files under that directory will be listed. Results will be storage paths relative to the given directory.

Storage backends with eventual consistency might return stale data.

Failures during iteration can result in FileBackendError exceptions (since 1.22).

See also: FileBackend::LIST_ERROR

Parameters

array

$params

Parameters include:

dir : storage directory
topOnly : only return direct child files of the directory (since 1.20)
adviseStat : set to true if stat requests will be made on the files (since 1.22)
forWrite : true if the list will inform a write operations (since 1.41)

Returns: Traversable|array|null File list enumerator or null (initial I/O error)

Reimplemented from FileBackend.

Definition at line 240 of file FileBackendDBRepoWrapper.php.

References $params.

◆ getFileProps()

FileBackendDBRepoWrapper::getFileProps ( array $params )

Get the properties of the content of the file at a storage path in the backend.

This gives the result of FSFile::getProps() on a local copy of the file.

Parameters

array

$params

Parameters include:

src : source storage path
latest : use the latest available data

Returns: array Properties map; FSFile::placeholderProps() if file missing or on I/O error

Reimplemented from FileBackend.

Definition at line 200 of file FileBackendDBRepoWrapper.php.

References $params, and translateSrcParams().

◆ getFileSha1Base36()

FileBackendDBRepoWrapper::getFileSha1Base36 ( array $params )

Get a SHA-1 hash of the content of the file at a storage path in the backend.

See also: FileBackend::SHA1_FAIL

Parameters

array

$params

Parameters include:

src : source storage path
latest : use the latest available data

Returns: string|false Hash string or false (missing file or I/O error)

Reimplemented from FileBackend.

Definition at line 196 of file FileBackendDBRepoWrapper.php.

References $params, and translateSrcParams().

◆ getFileSize()

FileBackendDBRepoWrapper::getFileSize ( array $params )

Get the size (bytes) of a file at a storage path in the backend.

See also: FileBackend::SIZE_FAIL

Parameters

array

$params

Parameters include:

src : source storage path
latest : use the latest available data

Returns: int|false File size in bytes or false (missing file or I/O error)

Reimplemented from FileBackend.

Definition at line 184 of file FileBackendDBRepoWrapper.php.

References $params, and translateSrcParams().

◆ getFileStat()

FileBackendDBRepoWrapper::getFileStat ( 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.

See also: FileBackend::STAT_ABSENT; FileBackend::STAT_ERROR

Parameters

array

$params

Parameters include:

src : source storage path
latest : use the latest available data

Returns: array|false|null Attribute map, false (missing file), or null (I/O error)

Reimplemented from FileBackend.

Definition at line 188 of file FileBackendDBRepoWrapper.php.

References $params, and translateSrcParams().

◆ getFileTimestamp()

FileBackendDBRepoWrapper::getFileTimestamp ( array $params )

Get the last-modified timestamp of the file at a storage path.

See also: FileBackend::TIMESTAMP_FAIL

Parameters

array

$params

Parameters include:

src : source storage path
latest : use the latest available data

Returns: string|false TS_MW timestamp or false (missing file or I/O error)

Reimplemented from FileBackend.

Definition at line 180 of file FileBackendDBRepoWrapper.php.

References $params, and translateSrcParams().

◆ getFileXAttributes()

FileBackendDBRepoWrapper::getFileXAttributes ( array $params )

Get metadata 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:

headers : map of HTTP headers used for GET/HEAD requests (name => value)
metadata : map of file metadata (name => value) Metadata keys and headers names will be returned in all lower-case. Additional values may be included for internal use only.

Use FileBackend::hasFeatures() to check how well this is supported.

See also: FileBackend::XATTRS_FAIL

Parameters

array

$params

$params include:

src : source storage path
latest : use the latest available data

Returns: array|false File metadata array or false (missing file or I/O error)

Since: 1.23

Reimplemented from FileBackend.

Definition at line 192 of file FileBackendDBRepoWrapper.php.

References $params, and translateSrcParams().

◆ getInternalBackend()

FileBackendDBRepoWrapper::getInternalBackend ( )

Get the underlying FileBackend that is being wrapped.

Returns: FileBackend

Definition at line 67 of file FileBackendDBRepoWrapper.php.

References $backend.

◆ getLocalCopyMulti()

FileBackendDBRepoWrapper::getLocalCopyMulti ( array $params )

Like getLocalCopy() except it takes an array of storage paths and yields an order preserved-map of storage paths to temporary local file copies.

Multiple calls to this method for the same path will create new copies.

See also: FileBackend::getLocalCopy()

Parameters

array

$params

Parameters include:

srcs : list of source storage paths
latest : use the latest available data
parallelize : try to do operations in parallel when possible

Returns: array Map of (path name => TempFSFile or false (missing) or null (error))

Since: 1.20

Reimplemented from FileBackend.

Definition at line 224 of file FileBackendDBRepoWrapper.php.

References $params, and translateArrayResults().

◆ getLocalReferenceMulti()

FileBackendDBRepoWrapper::getLocalReferenceMulti ( array $params )

Like getLocalReference() except it takes an array of storage paths and yields an order-preserved map of storage paths to temporary local file copies.

Never modify the returned files since they might be originals, they might be shared among multiple callers of this method, or the backend might internally keep FSFile references for deferred operations.

See also: FileBackend::getLocalReference()

Parameters

array

$params

Parameters include:

srcs : list of source storage paths
latest : use the latest available data
parallelize : try to do operations in parallel when possible

Returns: array Map of (path name => FSFile or false (missing) or null (error))

Since: 1.20

Reimplemented from FileBackend.

Definition at line 220 of file FileBackendDBRepoWrapper.php.

References $params, and translateArrayResults().

◆ getPathForSHA1()

FileBackendDBRepoWrapper::getPathForSHA1 ( $sha1 )

Get the ultimate original storage path for a file.

Use this when putting a new file into the system

Parameters

string $sha1 File SHA-1 base36

Returns: string

Definition at line 273 of file FileBackendDBRepoWrapper.php.

Referenced by getBackendPaths().

◆ getScopedLocksForOps()

FileBackendDBRepoWrapper::getScopedLocksForOps	(	array	$ops,
		StatusValue	$status )

Get an array of scoped locks needed for a batch of file operations.

Normally, FileBackend::doOperations() handles locking, unless the 'nonLocking' param is passed in. This function is useful if you want the files to be locked for a broader scope than just when the files are changing. For example, if you need to update DB metadata, you may want to keep the files locked until finished.

See also: FileBackend::doOperations()

Parameters

array	$ops	List of file operations to FileBackend::doOperations()
StatusValue	$status	StatusValue to update on lock/unlock

Returns: ScopedLock|null RAII-style self-unlocking lock or null on failure

Since: 1.20

Reimplemented from FileBackend.

Definition at line 261 of file FileBackendDBRepoWrapper.php.

◆ mungeOpPaths()

FileBackendDBRepoWrapper::mungeOpPaths ( array $ops )

protected

Translate legacy "title" source paths to their "sha1" counterparts.

This leaves destination paths alone since we don't want those to mutate

Parameters

array[] $ops

Returns: array[]

Definition at line 346 of file FileBackendDBRepoWrapper.php.

References getBackendPath(), and getBackendPaths().

Referenced by doOperationsInternal(), and doQuickOperationsInternal().

◆ preloadCache()

FileBackendDBRepoWrapper::preloadCache ( array $paths )

Preload persistent file stat cache and property cache into in-process cache.

This should be used when stat calls will be made on a known list of a many files.

See also: FileBackend::getFileStat()

Parameters

array $paths Storage paths

Reimplemented from FileBackend.

Definition at line 252 of file FileBackendDBRepoWrapper.php.

References getBackendPaths().

◆ preloadFileStat()

FileBackendDBRepoWrapper::preloadFileStat ( array $params )

Preload file stat information (concurrently if possible) into in-process cache.

This should be used when stat calls will be made on a known list of a many files. This does not make use of the persistent file stat cache.

See also: FileBackend::getFileStat()

Parameters

array

$params

Parameters include:

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

Returns: bool Whether all requests proceeded without I/O errors (since 1.24)

Since: 1.23

Reimplemented from FileBackend.

Definition at line 257 of file FileBackendDBRepoWrapper.php.

References $params, and translateSrcParams().

◆ streamFile()

FileBackendDBRepoWrapper::streamFile ( array $params )

Stream the content of the file at a storage path in the backend.

If the file does not exists, an HTTP 404 error will be given. Appropriate HTTP headers (Status, Content-Type, Content-Length) will be sent if streaming began, while none will be sent otherwise. Implementations should flush the output buffer before sending data.

Parameters

array

$params

Parameters include:

src : source storage path
headers : list of additional HTTP headers to send if the file exists
options : HTTP request header map with lower case keys (since 1.28). Supports: range : format is "bytes=(\\d*-\\d*)" if-modified-since : format is an HTTP date
headless : do not send HTTP headers (including those of "headers") (since 1.28)
latest : use the latest available data
allowOB : preserve any output buffers (since 1.28)