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TempFSFile.php
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TempFSFile.php
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<?php
/**
* Location holder of files stored temporarily
*
* @license GPL-2.0-or-later
* @file
* @ingroup FileBackend
*/
namespace Wikimedia\FileBackend\FSFile;
use RuntimeException;
use WeakMap;
use Wikimedia\AtEase\AtEase;
/**
* This class is used to hold the location and do limited manipulation
* of files stored temporarily (this will be whatever wfTempDir() returns)
*
* @ingroup FileBackend
*/
class TempFSFile extends FSFile {
/** @var bool Garbage collect the temp file */
protected $canDelete = false;
/** @var array Map of (path => 1) for paths to delete on shutdown */
protected static $pathsCollect = null;
/**
* A WeakMap where the key is an object which depends on the file, and the
* value is a TempFSFile responsible for deleting the file. This keeps each
* TempFSFile alive until all associated objects have been destroyed.
* @var WeakMap|null
*/
private static $references;
/**
* Do not call directly. Use TempFSFileFactory
*
* @param string $path
*/
public function __construct( $path ) {
parent::__construct( $path );
if ( self::$pathsCollect === null ) {
// @codeCoverageIgnoreStart
self::$pathsCollect = [];
register_shutdown_function( [ self::class, 'purgeAllOnShutdown' ] );
// @codeCoverageIgnoreEnd
}
}
/**
* Make a new temporary file on the file system.
* Temporary files may be purged when the file object falls out of scope.
*
* @deprecated since 1.34, use TempFSFileFactory directly
*
* @param string $prefix
* @param string $extension Optional file extension
* @param string|null $tmpDirectory Optional parent directory
* @return TempFSFile|null
*/
public static function factory( $prefix, $extension = '', $tmpDirectory = null ) {
return ( new TempFSFileFactory( $tmpDirectory ) )->newTempFSFile( $prefix, $extension );
}
/**
* @todo Is there any useful way to test this? Would it be useful to make this non-static on
* TempFSFileFactory?
*
* @return string Filesystem path to a temporary directory
* @throws RuntimeException if no writable temporary directory can be found
*/
public static function getUsableTempDirectory() {
$tmpDir = array_map( 'getenv', [ 'TMPDIR', 'TMP', 'TEMP' ] );
$tmpDir[] = sys_get_temp_dir();
$tmpDir[] = ini_get( 'upload_tmp_dir' );
foreach ( $tmpDir as $tmp ) {
if ( $tmp != '' && is_dir( $tmp ) && is_writable( $tmp ) ) {
return $tmp;
}
}
// PHP on Windows will detect C:\Windows\Temp as not writable even though PHP can write to
// it so create a directory within that called 'mwtmp' with a suffix of the user running
// the current process.
// The user is included as if various scripts are run by different users they will likely
// not be able to access each others temporary files.
if ( PHP_OS_FAMILY === 'Windows' ) {
$tmp = sys_get_temp_dir() . DIRECTORY_SEPARATOR . 'mwtmp-' . get_current_user();
if ( !is_dir( $tmp ) ) {
mkdir( $tmp );
}
if ( is_dir( $tmp ) && is_writable( $tmp ) ) {
return $tmp;
}
}
throw new RuntimeException(
'No writable temporary directory could be found. ' .
'Please explicitly specify a writable directory in configuration.' );
}
/**
* Purge this file off the file system
*
* @return bool Success
*/
public function purge() {
$this->canDelete = false; // done
AtEase::suppressWarnings();
$ok = unlink( $this->path );
AtEase::restoreWarnings();
unset( self::$pathsCollect[$this->path] );
return $ok;
}
/**
* Clean up the temporary file only after an object goes out of scope
*
* @param mixed $object
* @return TempFSFile This object
*/
public function bind( $object ) {
if ( is_object( $object ) ) {
// Use a WeakMap to avoid dynamic property creation (T324894)
if ( self::$references === null ) {
self::$references = new WeakMap;
}
self::$references[$object] = $this;
}
return $this;
}
/**
* Set flag to not clean up after the temporary file
*
* @return TempFSFile This object
*/
public function preserve() {
$this->canDelete = false;
unset( self::$pathsCollect[$this->path] );
return $this;
}
/**
* Set flag clean up after the temporary file
*
* @return TempFSFile This object
*/
public function autocollect() {
$this->canDelete = true;
self::$pathsCollect[$this->path] = 1;
return $this;
}
/**
* Try to make sure that all files are purged on error
*
* This method should only be called internally
*
* @codeCoverageIgnore
*/
public static function purgeAllOnShutdown() {
foreach ( self::$pathsCollect as $path => $unused ) {
AtEase::suppressWarnings();
unlink( $path );
AtEase::restoreWarnings();
}
}
/**
* Cleans up after the temporary file by deleting it
*/
public function __destruct() {
if ( $this->canDelete ) {
$this->purge();
}
}
}
/** @deprecated class alias since 1.43 */
class_alias( TempFSFile::class, 'TempFSFile' );

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Sat, May 16, 20:56 (1 d, 11 h)
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TempFSFile.php (4 KB)

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