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-rw-r--r--includes/filebackend/FileBackend.php370
1 files changed, 281 insertions, 89 deletions
diff --git a/includes/filebackend/FileBackend.php b/includes/filebackend/FileBackend.php
index 76c761b0..f40b8c16 100644
--- a/includes/filebackend/FileBackend.php
+++ b/includes/filebackend/FileBackend.php
@@ -37,14 +37,18 @@
* Outside callers can assume that all backends will have these functions.
*
* All "storage paths" are of the format "mwstore://<backend>/<container>/<path>".
- * The "<path>" portion is a relative path that uses UNIX file system (FS)
- * notation, though any particular backend may not actually be using a local
- * filesystem. Therefore, the relative paths are only virtual.
+ * The "backend" portion is unique name for MediaWiki to refer to a backend, while
+ * the "container" portion is a top-level directory of the backend. The "path" portion
+ * is a relative path that uses UNIX file system (FS) notation, though any particular
+ * backend may not actually be using a local filesystem. Therefore, the relative 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.
+ * Global (qualified) backends are achieved by configuring the "wiki ID" to a constant.
+ * For legacy reasons, the FSFileBackend class allows manually setting the paths of
+ * containers to ones that do not respect the "wiki ID".
*
+ * In key/value stores, the container is the only hierarchy (the rest is emulated).
* 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
@@ -75,9 +79,13 @@ abstract class FileBackend {
* $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 name should not be changed after use (e.g. with journaling).
+ * Note that the name is *not* used in actual container names.
+ * - wikiId : Prefix to container names that is unique to this backend.
+ * If not provided, this defaults to the current wiki ID.
* 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 : Registered name of a file lock manager to use.
* - fileJournal : File journal configuration; see FileJournal::factory().
* Journals simply log changes to files stored in the backend.
@@ -100,7 +108,7 @@ abstract class FileBackend {
: wfWikiID(); // e.g. "my_wiki-en_"
$this->lockManager = ( $config['lockManager'] instanceof LockManager )
? $config['lockManager']
- : LockManagerGroup::singleton()->get( $config['lockManager'] );
+ : LockManagerGroup::singleton( $this->wikiId )->get( $config['lockManager'] );
$this->fileJournal = isset( $config['fileJournal'] )
? ( ( $config['fileJournal'] instanceof FileJournal )
? $config['fileJournal']
@@ -129,7 +137,8 @@ abstract class FileBackend {
}
/**
- * Get the wiki identifier used for this backend (possibly empty)
+ * Get the wiki identifier used for this backend (possibly empty).
+ * Note that this might *not* be in the same format as wfWikiID().
*
* @return string
* @since 1.20
@@ -171,6 +180,7 @@ abstract class FileBackend {
* - copy
* - move
* - delete
+ * - describe (since 1.21)
* - null
*
* a) Create a new file in storage with the contents of a string
@@ -181,7 +191,8 @@ abstract class FileBackend {
* 'content' => <string of new file contents>,
* 'overwrite' => <boolean>,
* 'overwriteSame' => <boolean>,
- * 'disposition' => <Content-Disposition header value>
+ * 'disposition' => <Content-Disposition header value>,
+ * 'headers' => <HTTP header name/value map> # since 1.21
* );
* @endcode
*
@@ -193,7 +204,8 @@ abstract class FileBackend {
* 'dst' => <storage path>,
* 'overwrite' => <boolean>,
* 'overwriteSame' => <boolean>,
- * 'disposition' => <Content-Disposition header value>
+ * 'disposition' => <Content-Disposition header value>,
+ * 'headers' => <HTTP header name/value map> # since 1.21
* )
* @endcode
*
@@ -205,6 +217,7 @@ abstract class FileBackend {
* 'dst' => <storage path>,
* 'overwrite' => <boolean>,
* 'overwriteSame' => <boolean>,
+ * 'ignoreMissingSource' => <boolean>, # since 1.21
* 'disposition' => <Content-Disposition header value>
* )
* @endcode
@@ -217,6 +230,7 @@ abstract class FileBackend {
* 'dst' => <storage path>,
* 'overwrite' => <boolean>,
* 'overwriteSame' => <boolean>,
+ * 'ignoreMissingSource' => <boolean>, # since 1.21
* 'disposition' => <Content-Disposition header value>
* )
* @endcode
@@ -230,7 +244,17 @@ abstract class FileBackend {
* )
* @endcode
*
- * f) Do nothing (no-op)
+ * f) Update metadata for a file within storage
+ * @code
+ * array(
+ * 'op' => 'describe',
+ * 'src' => <storage path>,
+ * 'disposition' => <Content-Disposition header value>,
+ * 'headers' => <HTTP header name/value map>
+ * )
+ * @endcode
+ *
+ * g) Do nothing (no-op)
* @code
* array(
* 'op' => 'null',
@@ -244,28 +268,32 @@ abstract class FileBackend {
* - 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.
- * - disposition : When supplied, the backend will add a Content-Disposition
+ * - disposition : If supplied, the backend will return a Content-Disposition
* header when GETs/HEADs of the destination file are made.
- * Backends that don't support file metadata will ignore this.
- * See http://tools.ietf.org/html/rfc6266 (since 1.20).
+ * Backends that don't support metadata ignore this.
+ * See http://tools.ietf.org/html/rfc6266. (since 1.20)
+ * - headers : If supplied, the backend will return these headers when
+ * GETs/HEADs of the destination file are made. Header values
+ * should be smaller than 256 bytes, often options or numbers.
+ * Existing headers will remain, but these will replace any
+ * conflicting previous headers, and headers will be removed
+ * if they are set to an empty string.
+ * Backends that don't support metadata ignore this. (since 1.21)
*
* $opts is an associative of boolean flags, including:
* - force : Operation precondition errors no longer trigger an abort.
* Any remaining operations are still attempted. Unexpected
- * failures may still cause remaning operations to be aborted.
+ * failures may still cause remaining operations to be aborted.
* - 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.
* - nonJournaled : Don't log this operation batch in the file journal.
* This limits the ability of recovery scripts.
* - parallelize : Try to do operations in parallel when possible.
- * - bypassReadOnly : Allow writes in read-only mode (since 1.20).
+ * - bypassReadOnly : Allow writes in read-only mode. (since 1.20)
* - preserveCache : Don't clear the process cache before checking files.
* This should only be used if all entries in the process
- * cache were added after the files were already locked (since 1.20).
+ * cache were added after the files were already locked. (since 1.20)
*
* @remarks Remarks on locking:
* File system paths given to operations should refer to files that are
@@ -282,8 +310,8 @@ abstract class FileBackend {
* - a) unexpected operation errors occurred (network partitions, disk full...)
* - b) significant operation errors occurred and 'force' was not set
*
- * @param $ops Array List of operations to execute in order
- * @param $opts Array Batch operation options
+ * @param array $ops List of operations to execute in order
+ * @param array $opts Batch operation options
* @return Status
*/
final public function doOperations( array $ops, array $opts = array() ) {
@@ -292,18 +320,8 @@ abstract class FileBackend {
}
if ( empty( $opts['force'] ) ) { // sanity
unset( $opts['nonLocking'] );
- unset( $opts['allowStale'] );
- }
- $opts['concurrency'] = 1; // off
- if ( $this->parallelize === 'implicit' ) {
- if ( !isset( $opts['parallelize'] ) || $opts['parallelize'] ) {
- $opts['concurrency'] = $this->concurrency;
- }
- } elseif ( $this->parallelize === 'explicit' ) {
- if ( !empty( $opts['parallelize'] ) ) {
- $opts['concurrency'] = $this->concurrency;
- }
}
+ $scope = $this->getScopedPHPBehaviorForOps(); // try to ignore client aborts
return $this->doOperationsInternal( $ops, $opts );
}
@@ -319,8 +337,8 @@ abstract class FileBackend {
*
* @see FileBackend::doOperations()
*
- * @param $op Array Operation
- * @param $opts Array Operation options
+ * @param array $op Operation
+ * @param array $opts Operation options
* @return Status
*/
final public function doOperation( array $op, array $opts = array() ) {
@@ -333,8 +351,8 @@ abstract class FileBackend {
*
* @see FileBackend::doOperation()
*
- * @param $params Array Operation parameters
- * @param $opts Array Operation options
+ * @param array $params Operation parameters
+ * @param array $opts Operation options
* @return Status
*/
final public function create( array $params, array $opts = array() ) {
@@ -347,8 +365,8 @@ abstract class FileBackend {
*
* @see FileBackend::doOperation()
*
- * @param $params Array Operation parameters
- * @param $opts Array Operation options
+ * @param array $params Operation parameters
+ * @param array $opts Operation options
* @return Status
*/
final public function store( array $params, array $opts = array() ) {
@@ -361,8 +379,8 @@ abstract class FileBackend {
*
* @see FileBackend::doOperation()
*
- * @param $params Array Operation parameters
- * @param $opts Array Operation options
+ * @param array $params Operation parameters
+ * @param array $opts Operation options
* @return Status
*/
final public function copy( array $params, array $opts = array() ) {
@@ -375,8 +393,8 @@ abstract class FileBackend {
*
* @see FileBackend::doOperation()
*
- * @param $params Array Operation parameters
- * @param $opts Array Operation options
+ * @param array $params Operation parameters
+ * @param array $opts Operation options
* @return Status
*/
final public function move( array $params, array $opts = array() ) {
@@ -389,8 +407,8 @@ abstract class FileBackend {
*
* @see FileBackend::doOperation()
*
- * @param $params Array Operation parameters
- * @param $opts Array Operation options
+ * @param array $params Operation parameters
+ * @param array $opts Operation options
* @return Status
*/
final public function delete( array $params, array $opts = array() ) {
@@ -398,6 +416,21 @@ abstract class FileBackend {
}
/**
+ * Performs a single describe operation.
+ * This sets $params['op'] to 'describe' and passes it to doOperation().
+ *
+ * @see FileBackend::doOperation()
+ *
+ * @param array $params Operation parameters
+ * @param array $opts Operation options
+ * @return Status
+ * @since 1.21
+ */
+ final public function describe( array $params, array $opts = array() ) {
+ return $this->doOperation( array( 'op' => 'describe' ) + $params, $opts );
+ }
+
+ /**
* Perform a set of independent file operations on some files.
*
* This does no locking, nor journaling, and possibly no stat calls.
@@ -410,6 +443,7 @@ abstract class FileBackend {
* - copy
* - move
* - delete
+ * - describe (since 1.21)
* - null
*
* a) Create a new file in storage with the contents of a string
@@ -418,36 +452,44 @@ abstract class FileBackend {
* 'op' => 'create',
* 'dst' => <storage path>,
* 'content' => <string of new file contents>,
- * 'disposition' => <Content-Disposition header value>
+ * 'disposition' => <Content-Disposition header value>,
+ * 'headers' => <HTTP header name/value map> # since 1.21
* )
* @endcode
+ *
* b) Copy a file system file into storage
* @code
* array(
* 'op' => 'store',
* 'src' => <file system path>,
* 'dst' => <storage path>,
- * 'disposition' => <Content-Disposition header value>
+ * 'disposition' => <Content-Disposition header value>,
+ * 'headers' => <HTTP header name/value map> # since 1.21
* )
* @endcode
+ *
* c) Copy a file within storage
* @code
* array(
* 'op' => 'copy',
* 'src' => <storage path>,
* 'dst' => <storage path>,
+ * 'ignoreMissingSource' => <boolean>, # since 1.21
* 'disposition' => <Content-Disposition header value>
* )
* @endcode
+ *
* d) Move a file within storage
* @code
* array(
* 'op' => 'move',
* 'src' => <storage path>,
* 'dst' => <storage path>,
+ * 'ignoreMissingSource' => <boolean>, # since 1.21
* 'disposition' => <Content-Disposition header value>
* )
* @endcode
+ *
* e) Delete a file within storage
* @code
* array(
@@ -456,7 +498,18 @@ abstract class FileBackend {
* 'ignoreMissingSource' => <boolean>
* )
* @endcode
- * f) Do nothing (no-op)
+ *
+ * f) Update metadata for a file within storage
+ * @code
+ * array(
+ * 'op' => 'describe',
+ * 'src' => <storage path>,
+ * 'disposition' => <Content-Disposition header value>,
+ * 'headers' => <HTTP header name/value map>
+ * )
+ * @endcode
+ *
+ * g) Do nothing (no-op)
* @code
* array(
* 'op' => 'null',
@@ -470,6 +523,13 @@ abstract class FileBackend {
* header when GETs/HEADs of the destination file are made.
* Backends that don't support file metadata will ignore this.
* See http://tools.ietf.org/html/rfc6266 (since 1.20).
+ * - headers : If supplied with a header name/value map, the backend will
+ * reply with these headers when GETs/HEADs of the destination
+ * file are made. Header values should be smaller than 256 bytes.
+ * Existing headers will remain, but these will replace any
+ * conflicting previous headers, and headers will be removed
+ * if they are set to an empty string.
+ * Backends that don't support metadata ignore this. (since 1.21)
*
* $opts is an associative of boolean flags, including:
* - bypassReadOnly : Allow writes in read-only mode (since 1.20)
@@ -480,8 +540,8 @@ abstract class FileBackend {
* will reflect each operation attempted for the given files. The status will be
* considered "OK" as long as no fatal errors occurred.
*
- * @param $ops Array Set of operations to execute
- * @param $opts Array Batch operation options
+ * @param array $ops Set of operations to execute
+ * @param array $opts Batch operation options
* @return Status
* @since 1.20
*/
@@ -492,6 +552,7 @@ abstract class FileBackend {
foreach ( $ops as &$op ) {
$op['overwrite'] = true; // avoids RTTs in key/value stores
}
+ $scope = $this->getScopedPHPBehaviorForOps(); // try to ignore client aborts
return $this->doQuickOperationsInternal( $ops );
}
@@ -507,7 +568,7 @@ abstract class FileBackend {
*
* @see FileBackend::doQuickOperations()
*
- * @param $op Array Operation
+ * @param array $op Operation
* @return Status
* @since 1.20
*/
@@ -521,7 +582,7 @@ abstract class FileBackend {
*
* @see FileBackend::doQuickOperation()
*
- * @param $params Array Operation parameters
+ * @param array $params Operation parameters
* @return Status
* @since 1.20
*/
@@ -535,7 +596,7 @@ abstract class FileBackend {
*
* @see FileBackend::doQuickOperation()
*
- * @param $params Array Operation parameters
+ * @param array $params Operation parameters
* @return Status
* @since 1.20
*/
@@ -549,7 +610,7 @@ abstract class FileBackend {
*
* @see FileBackend::doQuickOperation()
*
- * @param $params Array Operation parameters
+ * @param array $params Operation parameters
* @return Status
* @since 1.20
*/
@@ -563,7 +624,7 @@ abstract class FileBackend {
*
* @see FileBackend::doQuickOperation()
*
- * @param $params Array Operation parameters
+ * @param array $params Operation parameters
* @return Status
* @since 1.20
*/
@@ -577,7 +638,7 @@ abstract class FileBackend {
*
* @see FileBackend::doQuickOperation()
*
- * @param $params Array Operation parameters
+ * @param array $params Operation parameters
* @return Status
* @since 1.20
*/
@@ -586,15 +647,30 @@ abstract class FileBackend {
}
/**
+ * Performs a single quick describe operation.
+ * This sets $params['op'] to 'describe' and passes it to doQuickOperation().
+ *
+ * @see FileBackend::doQuickOperation()
+ *
+ * @param array $params Operation parameters
+ * @return Status
+ * @since 1.21
+ */
+ final public function quickDescribe( array $params ) {
+ return $this->doQuickOperation( array( 'op' => 'describe' ) + $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.
*
- * @param $params Array Operation parameters
+ * @param array $params Operation parameters
* $params include:
- * - srcs : ordered source storage paths (e.g. chunk1, chunk2, ...)
- * - dst : file system path to 0-byte temp file
+ * - 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
* @return Status
*/
abstract public function concatenate( array $params );
@@ -608,7 +684,7 @@ abstract class FileBackend {
* except they are only applied *if* the directory/container had to be created.
* These flags should always be set for directories that have private files.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - dir : storage directory
* - noAccess : try to deny file access (since 1.20)
@@ -620,6 +696,7 @@ abstract class FileBackend {
if ( empty( $params['bypassReadOnly'] ) && $this->isReadOnly() ) {
return Status::newFatal( 'backend-fail-readonly', $this->name, $this->readOnly );
}
+ $scope = $this->getScopedPHPBehaviorForOps(); // try to ignore client aborts
return $this->doPrepare( $params );
}
@@ -635,7 +712,7 @@ abstract class FileBackend {
* access to the storage user representing end-users in web requests.
* This is not guaranteed to actually do anything.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - dir : storage directory
* - noAccess : try to deny file access
@@ -647,6 +724,7 @@ abstract class FileBackend {
if ( empty( $params['bypassReadOnly'] ) && $this->isReadOnly() ) {
return Status::newFatal( 'backend-fail-readonly', $this->name, $this->readOnly );
}
+ $scope = $this->getScopedPHPBehaviorForOps(); // try to ignore client aborts
return $this->doSecure( $params );
}
@@ -662,7 +740,7 @@ abstract class FileBackend {
* access to the storage user representing end-users in web requests.
* This essentially can undo the result of secure() calls.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - dir : storage directory
* - access : try to allow file access
@@ -675,6 +753,7 @@ abstract class FileBackend {
if ( empty( $params['bypassReadOnly'] ) && $this->isReadOnly() ) {
return Status::newFatal( 'backend-fail-readonly', $this->name, $this->readOnly );
}
+ $scope = $this->getScopedPHPBehaviorForOps(); // try to ignore client aborts
return $this->doPublish( $params );
}
@@ -688,7 +767,7 @@ abstract class FileBackend {
* Backends using key/value stores may do nothing unless the directory
* is that of an empty container, in which case it will be deleted.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - dir : storage directory
* - recursive : recursively delete empty subdirectories first (since 1.20)
@@ -699,6 +778,7 @@ abstract class FileBackend {
if ( empty( $params['bypassReadOnly'] ) && $this->isReadOnly() ) {
return Status::newFatal( 'backend-fail-readonly', $this->name, $this->readOnly );
}
+ $scope = $this->getScopedPHPBehaviorForOps(); // try to ignore client aborts
return $this->doClean( $params );
}
@@ -708,10 +788,25 @@ abstract class FileBackend {
abstract protected function doClean( array $params );
/**
+ * Enter file operation scope.
+ * This just makes PHP ignore user aborts/disconnects until the return
+ * value leaves scope. This returns null and does nothing in CLI mode.
+ *
+ * @return ScopedCallback|null
+ */
+ final protected function getScopedPHPBehaviorForOps() {
+ if ( php_sapi_name() != 'cli' ) { // http://bugs.php.net/bug.php?id=47540
+ $old = ignore_user_abort( true ); // avoid half-finished operations
+ return new ScopedCallback( function() use ( $old ) { ignore_user_abort( $old ); } );
+ }
+ return null;
+ }
+
+ /**
* Check if a file exists at a storage path in the backend.
* This returns false if only a directory exists at the path.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - src : source storage path
* - latest : use the latest available data
@@ -722,7 +817,7 @@ abstract class FileBackend {
/**
* Get the last-modified timestamp of the file at a storage path.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - src : source storage path
* - latest : use the latest available data
@@ -734,18 +829,40 @@ abstract class FileBackend {
* Get the contents of a file at a storage path in the backend.
* This should be avoided for potentially large files.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - src : source storage path
* - latest : use the latest available data
* @return string|bool Returns false on failure
*/
- abstract public function getFileContents( array $params );
+ final public function getFileContents( array $params ) {
+ $contents = $this->getFileContentsMulti(
+ array( 'srcs' => array( $params['src'] ) ) + $params );
+
+ return $contents[$params['src']];
+ }
+
+ /**
+ * Like getFileContents() except it takes an array of storage paths
+ * and returns a map of storage paths to strings (or null on failure).
+ * The map keys (paths) are in the same order as the provided list of paths.
+ *
+ * @see FileBackend::getFileContents()
+ *
+ * @param array $params
+ * $params include:
+ * - srcs : list of source storage paths
+ * - latest : use the latest available data
+ * - parallelize : try to do operations in parallel when possible
+ * @return Array Map of (path name => string or false on failure)
+ * @since 1.20
+ */
+ abstract public function getFileContentsMulti( array $params );
/**
* Get the size (bytes) of a file at a storage path in the backend.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - src : source storage path
* - latest : use the latest available data
@@ -761,7 +878,7 @@ abstract class FileBackend {
* - size : the file size (bytes)
* Additional values may be included for internal use only.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - src : source storage path
* - latest : use the latest available data
@@ -772,7 +889,7 @@ abstract class FileBackend {
/**
* Get a SHA-1 hash of the file at a storage path in the backend.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - src : source storage path
* - latest : use the latest available data
@@ -782,13 +899,13 @@ abstract class FileBackend {
/**
* Get the properties of the file at a storage path in the backend.
- * Returns FSFile::placeholderProps() on failure.
+ * This gives the result of FSFile::getProps() on a local copy of the file.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - src : source storage path
* - latest : use the latest available data
- * @return Array
+ * @return Array Returns FSFile::placeholderProps() on failure
*/
abstract public function getFileProps( array $params );
@@ -799,7 +916,7 @@ abstract class FileBackend {
* will be sent if streaming began, while none will be sent otherwise.
* Implementations should flush the output buffer before sending data.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - src : source storage path
* - headers : list of additional HTTP headers to send on success
@@ -821,26 +938,89 @@ abstract class FileBackend {
* 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.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - src : source storage path
* - latest : use the latest available data
* @return FSFile|null Returns null on failure
*/
- abstract public function getLocalReference( array $params );
+ final public function getLocalReference( array $params ) {
+ $fsFiles = $this->getLocalReferenceMulti(
+ array( 'srcs' => array( $params['src'] ) ) + $params );
+
+ return $fsFiles[$params['src']];
+ }
+
+ /**
+ * Like getLocalReference() except it takes an array of storage paths
+ * and returns a map of storage paths to FSFile objects (or null on failure).
+ * The map keys (paths) are in the same order as the provided list of paths.
+ *
+ * @see FileBackend::getLocalReference()
+ *
+ * @param array $params
+ * $params include:
+ * - srcs : list of source storage paths
+ * - latest : use the latest available data
+ * - parallelize : try to do operations in parallel when possible
+ * @return Array Map of (path name => FSFile or null on failure)
+ * @since 1.20
+ */
+ abstract public function getLocalReferenceMulti( 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.
*
- * @param $params Array
+ * @param array $params
* $params include:
* - src : source storage path
* - latest : use the latest available data
* @return TempFSFile|null Returns null on failure
*/
- abstract public function getLocalCopy( array $params );
+ final public function getLocalCopy( array $params ) {
+ $tmpFiles = $this->getLocalCopyMulti(
+ array( 'srcs' => array( $params['src'] ) ) + $params );
+
+ return $tmpFiles[$params['src']];
+ }
+
+ /**
+ * Like getLocalCopy() except it takes an array of storage paths and
+ * returns a map of storage paths to TempFSFile objects (or null on failure).
+ * The map keys (paths) are in the same order as the provided list of paths.
+ *
+ * @see FileBackend::getLocalCopy()
+ *
+ * @param array $params
+ * $params include:
+ * - srcs : list of source storage paths
+ * - latest : use the latest available data
+ * - parallelize : try to do operations in parallel when possible
+ * @return Array Map of (path name => TempFSFile or null on failure)
+ * @since 1.20
+ */
+ abstract public function getLocalCopyMulti( 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.
+ *
+ * @param array $params
+ * $params include:
+ * - src : source storage path
+ * - ttl : lifetime (seconds) if pre-authenticated; default is 1 day
+ * @return string|null
+ * @since 1.21
+ */
+ abstract public function getFileHttpUrl( array $params );
/**
* Check if a directory exists at a given storage path.
@@ -930,7 +1110,7 @@ abstract class FileBackend {
* Preload persistent file stat 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.
*
- * @param $paths Array Storage paths
+ * @param array $paths Storage paths
* @return void
*/
public function preloadCache( array $paths ) {}
@@ -939,7 +1119,7 @@ abstract class FileBackend {
* Invalidate any in-process file stat and property cache.
* If $paths is given, then only the cache for those files will be cleared.
*
- * @param $paths Array Storage paths (optional)
+ * @param array $paths Storage paths (optional)
* @return void
*/
public function clearCache( array $paths = null ) {}
@@ -950,7 +1130,7 @@ abstract class FileBackend {
*
* Callers should consider using getScopedFileLocks() instead.
*
- * @param $paths Array Storage paths
+ * @param array $paths Storage paths
* @param $type integer LockManager::LOCK_* constant
* @return Status
*/
@@ -961,7 +1141,7 @@ abstract class FileBackend {
/**
* Unlock the files at the given storage paths in the backend.
*
- * @param $paths Array Storage paths
+ * @param array $paths Storage paths
* @param $type integer LockManager::LOCK_* constant
* @return Status
*/
@@ -977,7 +1157,7 @@ abstract class FileBackend {
* 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 array $paths Storage paths
* @param $type integer LockManager::LOCK_* constant
* @param $status Status Status to update on lock/unlock
* @return ScopedLock|null Returns null on failure
@@ -997,7 +1177,7 @@ abstract class FileBackend {
*
* @see FileBackend::doOperations()
*
- * @param $ops Array List of file operations to FileBackend::doOperations()
+ * @param array $ops List of file operations to FileBackend::doOperations()
* @param $status Status Status to update on lock/unlock
* @return Array List of ScopedFileLocks or null values
* @since 1.20
@@ -1016,6 +1196,17 @@ abstract class FileBackend {
}
/**
+ * Get the storage path for the given container for this backend
+ *
+ * @param string $container Container name
+ * @return string Storage path
+ * @since 1.21
+ */
+ final public function getContainerStoragePath( $container ) {
+ return $this->getRootStoragePath() . "/{$container}";
+ }
+
+ /**
* Get the file journal object for this backend
*
* @return FileJournal
@@ -1088,7 +1279,7 @@ abstract class FileBackend {
*/
final public static function parentStoragePath( $storagePath ) {
$storagePath = dirname( $storagePath );
- list( $b, $cont, $rel ) = self::splitStoragePath( $storagePath );
+ list( , , $rel ) = self::splitStoragePath( $storagePath );
return ( $rel === null ) ? null : $storagePath;
}
@@ -1117,8 +1308,9 @@ abstract class FileBackend {
/**
* Build a Content-Disposition header value per RFC 6266.
*
- * @param $type string One of (attachment, inline)
- * @param $filename string Suggested file name (should not contain slashes)
+ * @param string $type One of (attachment, inline)
+ * @param string $filename Suggested file name (should not contain slashes)
+ * @throws MWException
* @return string
* @since 1.20
*/
@@ -1145,7 +1337,7 @@ abstract class FileBackend {
*
* This uses the same traversal protection as Title::secureAndSplit().
*
- * @param $path string Storage path relative to a container
+ * @param string $path Storage path relative to a container
* @return string|null
*/
final protected static function normalizeContainerPath( $path ) {
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-02 15:06:40 +0000