includes/upload/UploadStash.php

   1 <?php
   2 /**
   3  * UploadStash is intended to accomplish a few things:
   4  *   - enable applications to temporarily stash files without publishing them to the wiki.
   5  *      - Several parts of MediaWiki do this in similar ways: UploadBase, UploadWizard, and FirefoggChunkedExtension
   6  *        And there are several that reimplement stashing from scratch, in idiosyncratic ways. The idea is to unify them all here.
   7  *        Mostly all of them are the same except for storing some custom fields, which we subsume into the data array.
   8  *   - enable applications to find said files later, as long as the db table or temp files haven't been purged.
   9  *   - enable the uploading user (and *ONLY* the uploading user) to access said files, and thumbnails of said files, via a URL.
  10  *     We accomplish this using a database table, with ownership checking as you might expect. See SpecialUploadStash, which
  11  *     implements a web interface to some files stored this way.
  12  *
  13  * UploadStash right now is *mostly* intended to show you one user's slice of the entire stash. The user parameter is only optional
  14  * because there are few cases where we clean out the stash from an automated script. In the future we might refactor this.
  15  *
  16  * UploadStash represents the entire stash of temporary files.
  17  * UploadStashFile is a filestore for the actual physical disk files.
  18  * UploadFromStash extends UploadBase, and represents a single stashed file as it is moved from the stash to the regular file repository
  19  */
  20 class UploadStash {
  21
  22         // Format of the key for files -- has to be suitable as a filename itself (e.g. ab12cd34ef.jpg)
  23         const KEY_FORMAT_REGEX = '/^[\w-\.]+\.\w*$/';
  24
  25         /**
  26          * repository that this uses to store temp files
  27          * public because we sometimes need to get a LocalFile within the same repo.
  28          *
  29          * @var LocalRepo
  30          */
  31         public $repo;
  32
  33         // array of initialized repo objects
  34         protected $files = array();
  35
  36         // cache of the file metadata that's stored in the database
  37         protected $fileMetadata = array();
  38
  39         // fileprops cache
  40         protected $fileProps = array();
  41
  42         // current user
  43         protected $user, $userId, $isLoggedIn;
  44
  45         /**
  46          * Represents a temporary filestore, with metadata in the database.
  47          * Designed to be compatible with the session stashing code in UploadBase (should replace it eventually)
  48          *
  49          * @param $repo FileRepo
  50          */
  51         public function __construct( FileRepo $repo, $user = null ) {
  52                 // this might change based on wiki's configuration.
  53                 $this->repo = $repo;
  54
  55                 // if a user was passed, use it. otherwise, attempt to use the global.
  56                 // this keeps FileRepo from breaking when it creates an UploadStash object
  57                 if ( $user ) {
  58                         $this->user = $user;
  59                 } else {
  60                         global $wgUser;
  61                         $this->user = $wgUser;
  62                 }
  63
  64                 if ( is_object( $this->user ) ) {
  65                         $this->userId = $this->user->getId();
  66                         $this->isLoggedIn = $this->user->isLoggedIn();
  67                 }
  68         }
  69
  70         /**
  71          * Get a file and its metadata from the stash.
  72          * The noAuth param is a bit janky but is required for automated scripts which clean out the stash.
  73          *
  74          * @param $key String: key under which file information is stored
  75          * @param $noAuth Boolean (optional) Don't check authentication. Used by maintenance scripts.
  76          * @throws UploadStashFileNotFoundException
  77          * @throws UploadStashNotLoggedInException
  78          * @throws UploadStashWrongOwnerException
  79          * @throws UploadStashBadPathException
  80          * @return UploadStashFile
  81          */
  82         public function getFile( $key, $noAuth = false ) {
  83
  84                 if ( ! preg_match( self::KEY_FORMAT_REGEX, $key ) ) {
  85                         throw new UploadStashBadPathException( "key '$key' is not in a proper format" );
  86                 }
  87
  88                 if ( !$noAuth ) {
  89                         if ( !$this->isLoggedIn ) {
  90                                 throw new UploadStashNotLoggedInException( __METHOD__ . ' No user is logged in, files must belong to users' );
  91                         }
  92                 }
  93
  94                 if ( !isset( $this->fileMetadata[$key] ) ) {
  95                         if ( !$this->fetchFileMetadata( $key ) ) {
  96                                 // If nothing was received, it's likely due to replication lag.  Check the master to see if the record is there.
  97                                 $this->fetchFileMetadata( $key, DB_MASTER );
  98                         }
  99
 100                         if ( !isset( $this->fileMetadata[$key] ) ) {
 101                                 throw new UploadStashFileNotFoundException( "key '$key' not found in stash" );
 102                         }
 103
 104                         // create $this->files[$key]
 105                         $this->initFile( $key );
 106
 107                         // fetch fileprops
 108                         $path = $this->fileMetadata[$key]['us_path'];
 109                         $this->fileProps[$key] = $this->repo->getFileProps( $path );
 110                 }
 111
 112                 if ( ! $this->files[$key]->exists() ) {
 113                         wfDebug( __METHOD__ . " tried to get file at $key, but it doesn't exist\n" );
 114                         throw new UploadStashBadPathException( "path doesn't exist" );
 115                 }
 116
 117                 if ( !$noAuth ) {
 118                         if ( $this->fileMetadata[$key]['us_user'] != $this->userId ) {
 119                                 throw new UploadStashWrongOwnerException( "This file ($key) doesn't belong to the current user." );
 120                         }
 121                 }
 122
 123                 return $this->files[$key];
 124         }
 125
 126         /**
 127          * Getter for file metadata.
 128          *
 129          * @param key String: key under which file information is stored
 130          * @return Array
 131          */
 132         public function getMetadata ( $key ) {
 133                 $this->getFile( $key );
 134                 return $this->fileMetadata[$key];
 135         }
 136
 137         /**
 138          * Getter for fileProps
 139          *
 140          * @param key String: key under which file information is stored
 141          * @return Array
 142          */
 143         public function getFileProps ( $key ) {
 144                 $this->getFile( $key );
 145                 return $this->fileProps[$key];
 146         }
 147
 148         /**
 149          * Stash a file in a temp directory and record that we did this in the database, along with other metadata.
 150          *
 151          * @param $path String: path to file you want stashed
 152          * @param $sourceType String: the type of upload that generated this file (currently, I believe, 'file' or null)
 153          * @throws UploadStashBadPathException
 154          * @throws UploadStashFileException
 155          * @throws UploadStashNotLoggedInException
 156          * @return UploadStashFile: file, or null on failure
 157          */
 158         public function stashFile( $path, $sourceType = null ) {
 159                 if ( ! file_exists( $path ) ) {
 160                         wfDebug( __METHOD__ . " tried to stash file at '$path', but it doesn't exist\n" );
 161                         throw new UploadStashBadPathException( "path doesn't exist" );
 162                 }
 163                 $fileProps = FSFile::getPropsFromPath( $path );
 164                 wfDebug( __METHOD__ . " stashing file at '$path'\n" );
 165
 166                 // we will be initializing from some tmpnam files that don't have extensions.
 167                 // most of MediaWiki assumes all uploaded files have good extensions. So, we fix this.
 168                 $extension = self::getExtensionForPath( $path );
 169                 if ( ! preg_match( "/\\.\\Q$extension\\E$/", $path ) ) {
 170                         $pathWithGoodExtension = "$path.$extension";
 171                         if ( ! rename( $path, $pathWithGoodExtension ) ) {
 172                                 throw new UploadStashFileException( "couldn't rename $path to have a better extension at $pathWithGoodExtension" );
 173                         }
 174                         $path = $pathWithGoodExtension;
 175                 }
 176
 177                 // If no key was supplied, make one.  a mysql insertid would be totally reasonable here, except
 178                 // that for historical reasons, the key is this random thing instead.  At least it's not guessable.
 179                 //
 180                 // some things that when combined will make a suitably unique key.
 181                 // see: http://www.jwz.org/doc/mid.html
 182                 list ($usec, $sec) = explode( ' ', microtime() );
 183                 $usec = substr($usec, 2);
 184                 $key = wfBaseConvert( $sec . $usec, 10, 36 ) . '.' .
 185                         wfBaseConvert( mt_rand(), 10, 36 ) . '.'.
 186                         $this->userId . '.' .
 187                         $extension;
 188
 189                 $this->fileProps[$key] = $fileProps;
 190
 191                 if ( ! preg_match( self::KEY_FORMAT_REGEX, $key ) ) {
 192                         throw new UploadStashBadPathException( "key '$key' is not in a proper format" );
 193                 }
 194
 195                 wfDebug( __METHOD__ . " key for '$path': $key\n" );
 196
 197                 // if not already in a temporary area, put it there
 198                 $storeStatus = $this->repo->storeTemp( basename( $path ), $path );
 199
 200                 if ( ! $storeStatus->isOK() ) {
 201                         // It is a convention in MediaWiki to only return one error per API exception, even if multiple errors
 202                         // are available. We use reset() to pick the "first" thing that was wrong, preferring errors to warnings.
 203                         // This is a bit lame, as we may have more info in the $storeStatus and we're throwing it away, but to fix it means
 204                         // redesigning API errors significantly.
 205                         // $storeStatus->value just contains the virtual URL (if anything) which is probably useless to the caller
 206                         $error = $storeStatus->getErrorsArray();
 207                         $error = reset( $error );
 208                         if ( ! count( $error ) ) {
 209                                 $error = $storeStatus->getWarningsArray();
 210                                 $error = reset( $error );
 211                                 if ( ! count( $error ) ) {
 212                                         $error = array( 'unknown', 'no error recorded' );
 213                                 }
 214                         }
 215                         throw new UploadStashFileException( "Error storing file in '$path': " . implode( '; ', $error ) );
 216                 }
 217                 $stashPath = $storeStatus->value;
 218
 219                 // fetch the current user ID
 220                 if ( !$this->isLoggedIn ) {
 221                         throw new UploadStashNotLoggedInException( __METHOD__ . ' No user is logged in, files must belong to users' );
 222                 }
 223
 224                 // insert the file metadata into the db.
 225                 wfDebug( __METHOD__ . " inserting $stashPath under $key\n" );
 226                 $dbw = $this->repo->getMasterDb();
 227
 228                 $this->fileMetadata[$key] = array(
 229                         'us_id' => $dbw->nextSequenceValue( 'uploadstash_us_id_seq' ),
 230                         'us_user' => $this->userId,
 231                         'us_key' => $key,
 232                         'us_orig_path' => $path,
 233                         'us_path' => $stashPath, // virtual URL
 234                         'us_size' => $fileProps['size'],
 235                         'us_sha1' => $fileProps['sha1'],
 236                         'us_mime' => $fileProps['mime'],
 237                         'us_media_type' => $fileProps['media_type'],
 238                         'us_image_width' => $fileProps['width'],
 239                         'us_image_height' => $fileProps['height'],
 240                         'us_image_bits' => $fileProps['bits'],
 241                         'us_source_type' => $sourceType,
 242                         'us_timestamp' => $dbw->timestamp(),
 243                         'us_status' => 'finished'
 244                 );
 245
 246                 $dbw->insert(
 247                         'uploadstash',
 248                         $this->fileMetadata[$key],
 249                         __METHOD__
 250                 );
 251
 252                 // store the insertid in the class variable so immediate retrieval (possibly laggy) isn't necesary.
 253                 $this->fileMetadata[$key]['us_id'] = $dbw->insertId();
 254
 255                 # create the UploadStashFile object for this file.
 256                 $this->initFile( $key );
 257
 258                 return $this->getFile( $key );
 259         }
 260
 261         /**
 262          * Remove all files from the stash.
 263          * Does not clean up files in the repo, just the record of them.
 264          *
 265          * @throws UploadStashNotLoggedInException
 266          * @return boolean: success
 267          */
 268         public function clear() {
 269                 if ( !$this->isLoggedIn ) {
 270                         throw new UploadStashNotLoggedInException( __METHOD__ . ' No user is logged in, files must belong to users' );
 271                 }
 272
 273                 wfDebug( __METHOD__ . ' clearing all rows for user ' . $this->userId . "\n" );
 274                 $dbw = $this->repo->getMasterDb();
 275                 $dbw->delete(
 276                         'uploadstash',
 277                         array( 'us_user' => $this->userId ),
 278                         __METHOD__
 279                 );
 280
 281                 # destroy objects.
 282                 $this->files = array();
 283                 $this->fileMetadata = array();
 284
 285                 return true;
 286         }
 287
 288         /**
 289          * Remove a particular file from the stash.  Also removes it from the repo.
 290          *
 291          * @throws UploadStashNotLoggedInException
 292          * @throws UploadStashWrongOwnerException
 293          * @return boolean: success
 294          */
 295         public function removeFile( $key ) {
 296                 if ( !$this->isLoggedIn ) {
 297                         throw new UploadStashNotLoggedInException( __METHOD__ . ' No user is logged in, files must belong to users' );
 298                 }
 299
 300                 $dbw = $this->repo->getMasterDb();
 301
 302                 // this is a cheap query. it runs on the master so that this function still works when there's lag.
 303                 // it won't be called all that often.
 304                 $row = $dbw->selectRow(
 305                         'uploadstash',
 306                         'us_user',
 307                         array( 'us_key' => $key ),
 308                         __METHOD__
 309                 );
 310
 311                 if( !$row ) {
 312                         throw new UploadStashNoSuchKeyException( "No such key ($key), cannot remove" );
 313                 }
 314
 315                 if ( $row->us_user != $this->userId ) {
 316                         throw new UploadStashWrongOwnerException( "Can't delete: the file ($key) doesn't belong to this user." );
 317                 }
 318
 319                 return $this->removeFileNoAuth( $key );
 320         }
 321
 322
 323         /**
 324          * Remove a file (see removeFile), but doesn't check ownership first.
 325          *
 326          * @return boolean: success
 327          */
 328         public function removeFileNoAuth( $key ) {
 329                 wfDebug( __METHOD__ . " clearing row $key\n" );
 330
 331                 $dbw = $this->repo->getMasterDb();
 332
 333                 // this gets its own transaction since it's called serially by the cleanupUploadStash maintenance script
 334                 $dbw->begin();
 335                 $dbw->delete(
 336                         'uploadstash',
 337                         array( 'us_key' => $key ),
 338                         __METHOD__
 339                 );
 340                 $dbw->commit();
 341
 342                 // TODO: look into UnregisteredLocalFile and find out why the rv here is sometimes wrong (false when file was removed)
 343                 // for now, ignore.
 344                 $this->files[$key]->remove();
 345
 346                 unset( $this->files[$key] );
 347                 unset( $this->fileMetadata[$key] );
 348
 349                 return true;
 350         }
 351
 352         /**
 353          * List all files in the stash.
 354          *
 355          * @throws UploadStashNotLoggedInException
 356          * @return Array
 357          */
 358         public function listFiles() {
 359                 if ( !$this->isLoggedIn ) {
 360                         throw new UploadStashNotLoggedInException( __METHOD__ . ' No user is logged in, files must belong to users' );
 361                 }
 362
 363                 $dbr = $this->repo->getSlaveDb();
 364                 $res = $dbr->select(
 365                         'uploadstash',
 366                         'us_key',
 367                         array( 'us_user' => $this->userId ),
 368                         __METHOD__
 369                 );
 370
 371                 if ( !is_object( $res ) || $res->numRows() == 0 ) {
 372                         // nothing to do.
 373                         return false;
 374                 }
 375
 376                 // finish the read before starting writes.
 377                 $keys = array();
 378                 foreach ( $res as $row ) {
 379                         array_push( $keys, $row->us_key );
 380                 }
 381
 382                 return $keys;
 383         }
 384
 385         /**
 386          * Find or guess extension -- ensuring that our extension matches our mime type.
 387          * Since these files are constructed from php tempnames they may not start off
 388          * with an extension.
 389          * XXX this is somewhat redundant with the checks that ApiUpload.php does with incoming
 390          * uploads versus the desired filename. Maybe we can get that passed to us...
 391          */
 392         public static function getExtensionForPath( $path ) {
 393                 // Does this have an extension?
 394                 $n = strrpos( $path, '.' );
 395                 $extension = null;
 396                 if ( $n !== false ) {
 397                         $extension = $n ? substr( $path, $n + 1 ) : '';
 398                 } else {
 399                         // If not, assume that it should be related to the mime type of the original file.
 400                         $magic = MimeMagic::singleton();
 401                         $mimeType = $magic->guessMimeType( $path );
 402                         $extensions = explode( ' ', MimeMagic::singleton()->getExtensionsForType( $mimeType ) );
 403                         if ( count( $extensions ) ) {
 404                                 $extension = $extensions[0];
 405                         }
 406                 }
 407
 408                 if ( is_null( $extension ) ) {
 409                         throw new UploadStashFileException( "extension is null" );
 410                 }
 411
 412                 return File::normalizeExtension( $extension );
 413         }
 414
 415         /**
 416          * Helper function: do the actual database query to fetch file metadata.
 417          *
 418          * @param $key String: key
 419          * @return boolean
 420          */
 421         protected function fetchFileMetadata( $key, $readFromDB = DB_SLAVE ) {
 422                 // populate $fileMetadata[$key]
 423                 $dbr = null;
 424                 if( $readFromDB === DB_MASTER ) {
 425                         // sometimes reading from the master is necessary, if there's replication lag.
 426                         $dbr = $this->repo->getMasterDb();
 427                 } else {
 428                         $dbr = $this->repo->getSlaveDb();
 429                 }
 430
 431                 $row = $dbr->selectRow(
 432                         'uploadstash',
 433                         '*',
 434                         array( 'us_key' => $key ),
 435                         __METHOD__
 436                 );
 437
 438                 if ( !is_object( $row ) ) {
 439                         // key wasn't present in the database. this will happen sometimes.
 440                         return false;
 441                 }
 442
 443                 $this->fileMetadata[$key] = (array)$row;
 444
 445                 return true;
 446         }
 447
 448         /**
 449          * Helper function: Initialize the UploadStashFile for a given file.
 450          *
 451          * @param $path String: path to file
 452          * @param $key String: key under which to store the object
 453          * @throws UploadStashZeroLengthFileException
 454          * @return bool
 455          */
 456         protected function initFile( $key ) {
 457                 $file = new UploadStashFile( $this->repo, $this->fileMetadata[$key]['us_path'], $key );
 458                 if ( $file->getSize() === 0 ) {
 459                         throw new UploadStashZeroLengthFileException( "File is zero length" );
 460                 }
 461                 $this->files[$key] = $file;
 462                 return true;
 463         }
 464 }
 465
 466 class UploadStashFile extends UnregisteredLocalFile {
 467         private $fileKey;
 468         private $urlName;
 469         protected $url;
 470
 471         /**
 472          * A LocalFile wrapper around a file that has been temporarily stashed, so we can do things like create thumbnails for it
 473          * Arguably UnregisteredLocalFile should be handling its own file repo but that class is a bit retarded currently
 474          *
 475          * @param $repo FSRepo: repository where we should find the path
 476          * @param $path String: path to file
 477          * @param $key String: key to store the path and any stashed data under
 478          * @throws UploadStashBadPathException
 479          * @throws UploadStashFileNotFoundException
 480          */
 481         public function __construct( $repo, $path, $key ) {
 482                 $this->fileKey = $key;
 483
 484                 // resolve mwrepo:// urls
 485                 if ( $repo->isVirtualUrl( $path ) ) {
 486                         $path = $repo->resolveVirtualUrl( $path );
 487                 } else {
 488
 489                         // check if path appears to be sane, no parent traversals, and is in this repo's temp zone.
 490                         $repoTempPath = $repo->getZonePath( 'temp' );
 491                         if ( ( ! $repo->validateFilename( $path ) ) ||
 492                                         ( strpos( $path, $repoTempPath ) !== 0 ) ) {
 493                                 wfDebug( "UploadStash: tried to construct an UploadStashFile from a file that should already exist at '$path', but path is not valid\n" );
 494                                 throw new UploadStashBadPathException( 'path is not valid' );
 495                         }
 496
 497                         // check if path exists! and is a plain file.
 498                         if ( ! $repo->fileExists( $path, FileRepo::FILES_ONLY ) ) {
 499                                 wfDebug( "UploadStash: tried to construct an UploadStashFile from a file that should already exist at '$path', but path is not found\n" );
 500                                 throw new UploadStashFileNotFoundException( 'cannot find path, or not a plain file' );
 501                         }
 502                 }
 503
 504                 parent::__construct( false, $repo, $path, false );
 505
 506                 $this->name = basename( $this->path );
 507         }
 508
 509         /**
 510          * A method needed by the file transforming and scaling routines in File.php
 511          * We do not necessarily care about doing the description at this point
 512          * However, we also can't return the empty string, as the rest of MediaWiki demands this (and calls to imagemagick
 513          * convert require it to be there)
 514          *
 515          * @return String: dummy value
 516          */
 517         public function getDescriptionUrl() {
 518                 return $this->getUrl();
 519         }
 520
 521         /**
 522          * Get the path for the thumbnail (actually any transformation of this file)
 523          * The actual argument is the result of thumbName although we seem to have
 524          * buggy code elsewhere that expects a boolean 'suffix'
 525          *
 526          * @param $thumbName String: name of thumbnail (e.g. "120px-123456.jpg" ), or false to just get the path
 527          * @return String: path thumbnail should take on filesystem, or containing directory if thumbname is false
 528          */
 529         public function getThumbPath( $thumbName = false ) {
 530                 $path = dirname( $this->path );
 531                 if ( $thumbName !== false ) {
 532                         $path .= "/$thumbName";
 533                 }
 534                 return $path;
 535         }
 536
 537         /**
 538          * Return the file/url base name of a thumbnail with the specified parameters.
 539          * We override this because we want to use the pretty url name instead of the
 540          * ugly file name.
 541          *
 542          * @param $params Array: handler-specific parameters
 543          * @return String: base name for URL, like '120px-12345.jpg', or null if there is no handler
 544          */
 545         function thumbName( $params ) {
 546                 return $this->generateThumbName( $this->getUrlName(), $params );
 547         }
 548
 549         /**
 550          * Helper function -- given a 'subpage', return the local URL e.g. /wiki/Special:UploadStash/subpage
 551          * @param {String} $subPage
 552          * @return {String} local URL for this subpage in the Special:UploadStash space.
 553          */
 554         private function getSpecialUrl( $subPage ) {
 555                 return SpecialPage::getTitleFor( 'UploadStash', $subPage )->getLocalURL();
 556         }
 557
 558         /**
 559          * Get a URL to access the thumbnail
 560          * This is required because the model of how files work requires that
 561          * the thumbnail urls be predictable. However, in our model the URL is not based on the filename
 562          * (that's hidden in the db)
 563          *
 564          * @param $thumbName String: basename of thumbnail file -- however, we don't want to use the file exactly
 565          * @return String: URL to access thumbnail, or URL with partial path
 566          */
 567         public function getThumbUrl( $thumbName = false ) {
 568                 wfDebug( __METHOD__ . " getting for $thumbName \n" );
 569                 return $this->getSpecialUrl( 'thumb/' . $this->getUrlName() . '/' . $thumbName );
 570         }
 571
 572         /**
 573          * The basename for the URL, which we want to not be related to the filename.
 574          * Will also be used as the lookup key for a thumbnail file.
 575          *
 576          * @return String: base url name, like '120px-123456.jpg'
 577          */
 578         public function getUrlName() {
 579                 if ( ! $this->urlName ) {
 580                         $this->urlName = $this->fileKey;
 581                 }
 582                 return $this->urlName;
 583         }
 584
 585         /**
 586          * Return the URL of the file, if for some reason we wanted to download it
 587          * We tend not to do this for the original file, but we do want thumb icons
 588          *
 589          * @return String: url
 590          */
 591         public function getUrl() {
 592                 if ( !isset( $this->url ) ) {
 593                         $this->url = $this->getSpecialUrl( 'file/' . $this->getUrlName() );
 594                 }
 595                 return $this->url;
 596         }
 597
 598         /**
 599          * Parent classes use this method, for no obvious reason, to return the path (relative to wiki root, I assume).
 600          * But with this class, the URL is unrelated to the path.
 601          *
 602          * @return String: url
 603          */
 604         public function getFullUrl() {
 605                 return $this->getUrl();
 606         }
 607
 608         /**
 609          * Getter for file key (the unique id by which this file's location & metadata is stored in the db)
 610          *
 611          * @return String: file key
 612          */
 613         public function getFileKey() {
 614                 return $this->fileKey;
 615         }
 616
 617         /**
 618          * Remove the associated temporary file
 619          * @return Status: success
 620          */
 621         public function remove() {
 622                 if ( !$this->repo->fileExists( $this->path, FileRepo::FILES_ONLY ) ) {
 623                         // Maybe the file's already been removed? This could totally happen in UploadBase.
 624                         return true;
 625                 }
 626
 627                 return $this->repo->freeTemp( $this->path );
 628         }
 629
 630         public function exists() {
 631                 return $this->repo->fileExists( $this->path, FileRepo::FILES_ONLY );
 632         }
 633
 634 }
 635
 636 class UploadStashNotAvailableException extends MWException {};
 637 class UploadStashFileNotFoundException extends MWException {};
 638 class UploadStashBadPathException extends MWException {};
 639 class UploadStashFileException extends MWException {};
 640 class UploadStashZeroLengthFileException extends MWException {};
 641 class UploadStashNotLoggedInException extends MWException {};
 642 class UploadStashWrongOwnerException extends MWException {};
 643 class UploadStashNoSuchKeyException extends MWException {};