3 * Non-directory file on the file system.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
21 * @ingroup FileBackend
25 * Class representing a non-directory file on the file system
27 * @ingroup FileBackend
30 protected $path; // path to file
31 protected $sha1Base36; // file SHA-1 in base 36
34 * Sets up the file object
36 * @param string $path Path to temporary file on local disk
39 public function __construct( $path ) {
40 if ( FileBackend
::isStoragePath( $path ) ) {
41 throw new MWException( __METHOD__
. " given storage path `$path`." );
47 * Returns the file system path
51 public function getPath() {
56 * Checks if the file exists
60 public function exists() {
61 return is_file( $this->path
);
65 * Get the file size in bytes
69 public function getSize() {
70 return filesize( $this->path
);
74 * Get the file's last-modified timestamp
76 * @return string|bool TS_MW timestamp or false on failure
78 public function getTimestamp() {
80 $timestamp = filemtime( $this->path
);
82 if ( $timestamp !== false ) {
83 $timestamp = wfTimestamp( TS_MW
, $timestamp );
90 * Guess the MIME type from the file contents alone
94 public function getMimeType() {
95 return MimeMagic
::singleton()->guessMimeType( $this->path
, false );
99 * Get an associative array containing information about
100 * a file with the given storage path.
102 * @param mixed $ext The file extension, or true to extract it from the filename.
103 * Set it to false to ignore the extension.
107 public function getProps( $ext = true ) {
108 wfProfileIn( __METHOD__
);
109 wfDebug( __METHOD__
. ": Getting file info for $this->path\n" );
111 $info = self
::placeholderProps();
112 $info['fileExists'] = $this->exists();
114 if ( $info['fileExists'] ) {
115 $magic = MimeMagic
::singleton();
117 # get the file extension
118 if ( $ext === true ) {
119 $ext = self
::extensionFromPath( $this->path
);
122 # mime type according to file contents
123 $info['file-mime'] = $this->getMimeType();
125 $info['mime'] = $magic->improveTypeFromExtension( $info['file-mime'], $ext );
127 list( $info['major_mime'], $info['minor_mime'] ) = File
::splitMime( $info['mime'] );
128 $info['media_type'] = $magic->getMediaType( $this->path
, $info['mime'] );
131 $info['size'] = $this->getSize();
133 # Height, width and metadata
134 $handler = MediaHandler
::getHandler( $info['mime'] );
136 $tempImage = (object)array(); // XXX (hack for File object)
137 $info['metadata'] = $handler->getMetadata( $tempImage, $this->path
);
138 $gis = $handler->getImageSize( $tempImage, $this->path
, $info['metadata'] );
139 if ( is_array( $gis ) ) {
140 $info = $this->extractImageSizeInfo( $gis ) +
$info;
143 $info['sha1'] = $this->getSha1Base36();
145 wfDebug( __METHOD__
. ": $this->path loaded, {$info['size']} bytes, {$info['mime']}.\n" );
147 wfDebug( __METHOD__
. ": $this->path NOT FOUND!\n" );
150 wfProfileOut( __METHOD__
);
156 * Placeholder file properties to use for files that don't exist
160 public static function placeholderProps() {
162 $info['fileExists'] = false;
163 $info['mime'] = null;
164 $info['media_type'] = MEDIATYPE_UNKNOWN
;
165 $info['metadata'] = '';
175 * Exract image size information
180 protected function extractImageSizeInfo( array $gis ) {
182 # NOTE: $gis[2] contains a code for the image type. This is no longer used.
183 $info['width'] = $gis[0];
184 $info['height'] = $gis[1];
185 if ( isset( $gis['bits'] ) ) {
186 $info['bits'] = $gis['bits'];
195 * Get a SHA-1 hash of a file in the local filesystem, in base-36 lower case
196 * encoding, zero padded to 31 digits.
198 * 160 log 2 / log 36 = 30.95, so the 160-bit hash fills 31 digits in base 36
201 * @param bool $recache
202 * @return bool|string False on failure
204 public function getSha1Base36( $recache = false ) {
205 wfProfileIn( __METHOD__
);
207 if ( $this->sha1Base36
!== null && !$recache ) {
208 wfProfileOut( __METHOD__
);
210 return $this->sha1Base36
;
213 wfSuppressWarnings();
214 $this->sha1Base36
= sha1_file( $this->path
);
217 if ( $this->sha1Base36
!== false ) {
218 $this->sha1Base36
= wfBaseConvert( $this->sha1Base36
, 16, 36, 31 );
221 wfProfileOut( __METHOD__
);
223 return $this->sha1Base36
;
227 * Get the final file extension from a file system path
229 * @param string $path
232 public static function extensionFromPath( $path ) {
233 $i = strrpos( $path, '.' );
235 return strtolower( $i ?
substr( $path, $i +
1 ) : '' );
239 * Get an associative array containing information about a file in the local filesystem.
241 * @param string $path absolute local filesystem path
242 * @param mixed $ext The file extension, or true to extract it from the filename.
243 * Set it to false to ignore the extension.
246 public static function getPropsFromPath( $path, $ext = true ) {
247 $fsFile = new self( $path );
249 return $fsFile->getProps( $ext );
253 * Get a SHA-1 hash of a file in the local filesystem, in base-36 lower case
254 * encoding, zero padded to 31 digits.
256 * 160 log 2 / log 36 = 30.95, so the 160-bit hash fills 31 digits in base 36
259 * @param string $path
260 * @return bool|string False on failure
262 public static function getSha1Base36FromPath( $path ) {
263 $fsFile = new self( $path );
265 return $fsFile->getSha1Base36();