3 * Base class for the backend of file upload.
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
25 * @defgroup Upload Upload related
31 * UploadBase and subclasses are the backend of MediaWiki's file uploads.
32 * The frontends are formed by ApiUpload and SpecialUpload.
34 * See also includes/docs/upload.txt
36 * @author Brion Vibber
37 * @author Bryan Tong Minh
38 * @author Michael Dale
40 abstract class UploadBase
{
42 protected $mDesiredDestName, $mDestName, $mRemoveTempFile, $mSourceType;
43 protected $mTitle = false, $mTitleError = 0;
44 protected $mFilteredName, $mFinalExtension;
45 protected $mLocalFile, $mFileSize, $mFileProps;
46 protected $mBlackListedExtensions;
47 protected $mJavaDetected;
49 protected static $safeXmlEncodings = array( 'UTF-8', 'ISO-8859-1', 'ISO-8859-2', 'UTF-16', 'UTF-32' );
54 const MIN_LENGTH_PARTNAME
= 4;
55 const ILLEGAL_FILENAME
= 5;
56 const OVERWRITE_EXISTING_FILE
= 7; # Not used anymore; handled by verifyTitlePermissions()
57 const FILETYPE_MISSING
= 8;
58 const FILETYPE_BADTYPE
= 9;
59 const VERIFICATION_ERROR
= 10;
61 # HOOK_ABORTED is the new name of UPLOAD_VERIFICATION_ERROR
62 const UPLOAD_VERIFICATION_ERROR
= 11;
63 const HOOK_ABORTED
= 11;
64 const FILE_TOO_LARGE
= 12;
65 const WINDOWS_NONASCII_FILENAME
= 13;
66 const FILENAME_TOO_LONG
= 14;
68 const SESSION_STATUS_KEY
= 'wsUploadStatusData';
74 public function getVerificationErrorCode( $error ) {
75 $code_to_status = array(
76 self
::EMPTY_FILE
=> 'empty-file',
77 self
::FILE_TOO_LARGE
=> 'file-too-large',
78 self
::FILETYPE_MISSING
=> 'filetype-missing',
79 self
::FILETYPE_BADTYPE
=> 'filetype-banned',
80 self
::MIN_LENGTH_PARTNAME
=> 'filename-tooshort',
81 self
::ILLEGAL_FILENAME
=> 'illegal-filename',
82 self
::OVERWRITE_EXISTING_FILE
=> 'overwrite',
83 self
::VERIFICATION_ERROR
=> 'verification-error',
84 self
::HOOK_ABORTED
=> 'hookaborted',
85 self
::WINDOWS_NONASCII_FILENAME
=> 'windows-nonascii-filename',
86 self
::FILENAME_TOO_LONG
=> 'filename-toolong',
88 if ( isset( $code_to_status[$error] ) ) {
89 return $code_to_status[$error];
92 return 'unknown-error';
96 * Returns true if uploads are enabled.
97 * Can be override by subclasses.
100 public static function isEnabled() {
101 global $wgEnableUploads;
103 if ( !$wgEnableUploads ) {
107 # Check php's file_uploads setting
108 return wfIsHipHop() ||
wfIniGetBool( 'file_uploads' );
112 * Returns true if the user can use this upload module or else a string
113 * identifying the missing permission.
114 * Can be overridden by subclasses.
119 public static function isAllowed( $user ) {
120 foreach ( array( 'upload', 'edit' ) as $permission ) {
121 if ( !$user->isAllowed( $permission ) ) {
128 // Upload handlers. Should probably just be a global.
129 static $uploadHandlers = array( 'Stash', 'File', 'Url' );
132 * Create a form of UploadBase depending on wpSourceType and initializes it
134 * @param $request WebRequest
138 public static function createFromRequest( &$request, $type = null ) {
139 $type = $type ?
$type : $request->getVal( 'wpSourceType', 'File' );
145 // Get the upload class
146 $type = ucfirst( $type );
148 // Give hooks the chance to handle this request
150 wfRunHooks( 'UploadCreateFromRequest', array( $type, &$className ) );
151 if ( is_null( $className ) ) {
152 $className = 'UploadFrom' . $type;
153 wfDebug( __METHOD__
. ": class name: $className\n" );
154 if ( !in_array( $type, self
::$uploadHandlers ) ) {
159 // Check whether this upload class is enabled
160 if ( !call_user_func( array( $className, 'isEnabled' ) ) ) {
164 // Check whether the request is valid
165 if ( !call_user_func( array( $className, 'isValidRequest' ), $request ) ) {
169 $handler = new $className;
171 $handler->initializeFromRequest( $request );
176 * Check whether a request if valid for this handler
180 public static function isValidRequest( $request ) {
184 public function __construct() {}
187 * Returns the upload type. Should be overridden by child classes
192 public function getSourceType() {
197 * Initialize the path information
198 * @param string $name the desired destination name
199 * @param string $tempPath the temporary path
200 * @param int $fileSize the file size
201 * @param bool $removeTempFile (false) remove the temporary file?
202 * @throws MWException
204 public function initializePathInfo( $name, $tempPath, $fileSize, $removeTempFile = false ) {
205 $this->mDesiredDestName
= $name;
206 if ( FileBackend
::isStoragePath( $tempPath ) ) {
207 throw new MWException( __METHOD__
. " given storage path `$tempPath`." );
209 $this->mTempPath
= $tempPath;
210 $this->mFileSize
= $fileSize;
211 $this->mRemoveTempFile
= $removeTempFile;
215 * Initialize from a WebRequest. Override this in a subclass.
217 abstract public function initializeFromRequest( &$request );
220 * Fetch the file. Usually a no-op
223 public function fetchFile() {
224 return Status
::newGood();
228 * Return true if the file is empty
231 public function isEmptyFile() {
232 return empty( $this->mFileSize
);
236 * Return the file size
239 public function getFileSize() {
240 return $this->mFileSize
;
244 * Get the base 36 SHA1 of the file
247 public function getTempFileSha1Base36() {
248 return FSFile
::getSha1Base36FromPath( $this->mTempPath
);
252 * @param string $srcPath the source path
253 * @return string the real path if it was a virtual URL
255 function getRealPath( $srcPath ) {
256 wfProfileIn( __METHOD__
);
257 $repo = RepoGroup
::singleton()->getLocalRepo();
258 if ( $repo->isVirtualUrl( $srcPath ) ) {
259 // @todo just make uploads work with storage paths
260 // UploadFromStash loads files via virtual URLs
261 $tmpFile = $repo->getLocalCopy( $srcPath );
262 $tmpFile->bind( $this ); // keep alive with $this
263 wfProfileOut( __METHOD__
);
264 return $tmpFile->getPath();
266 wfProfileOut( __METHOD__
);
271 * Verify whether the upload is sane.
272 * @return mixed self::OK or else an array with error information
274 public function verifyUpload() {
275 wfProfileIn( __METHOD__
);
278 * If there was no filename or a zero size given, give up quick.
280 if ( $this->isEmptyFile() ) {
281 wfProfileOut( __METHOD__
);
282 return array( 'status' => self
::EMPTY_FILE
);
286 * Honor $wgMaxUploadSize
288 $maxSize = self
::getMaxUploadSize( $this->getSourceType() );
289 if ( $this->mFileSize
> $maxSize ) {
290 wfProfileOut( __METHOD__
);
292 'status' => self
::FILE_TOO_LARGE
,
298 * Look at the contents of the file; if we can recognize the
299 * type but it's corrupt or data of the wrong type, we should
300 * probably not accept it.
302 $verification = $this->verifyFile();
303 if ( $verification !== true ) {
304 wfProfileOut( __METHOD__
);
306 'status' => self
::VERIFICATION_ERROR
,
307 'details' => $verification
312 * Make sure this file can be created
314 $result = $this->validateName();
315 if ( $result !== true ) {
316 wfProfileOut( __METHOD__
);
321 if ( !wfRunHooks( 'UploadVerification',
322 array( $this->mDestName
, $this->mTempPath
, &$error ) ) )
324 wfProfileOut( __METHOD__
);
325 return array( 'status' => self
::HOOK_ABORTED
, 'error' => $error );
328 wfProfileOut( __METHOD__
);
329 return array( 'status' => self
::OK
);
333 * Verify that the name is valid and, if necessary, that we can overwrite
335 * @return mixed true if valid, otherwise and array with 'status'
338 public function validateName() {
339 $nt = $this->getTitle();
340 if ( is_null( $nt ) ) {
341 $result = array( 'status' => $this->mTitleError
);
342 if ( $this->mTitleError
== self
::ILLEGAL_FILENAME
) {
343 $result['filtered'] = $this->mFilteredName
;
345 if ( $this->mTitleError
== self
::FILETYPE_BADTYPE
) {
346 $result['finalExt'] = $this->mFinalExtension
;
347 if ( count( $this->mBlackListedExtensions
) ) {
348 $result['blacklistedExt'] = $this->mBlackListedExtensions
;
353 $this->mDestName
= $this->getLocalFile()->getName();
359 * Verify the mime type.
361 * @note Only checks that it is not an evil mime. The does it have
362 * correct extension given its mime type check is in verifyFile.
363 * @param string $mime representing the mime
364 * @return mixed true if the file is verified, an array otherwise
366 protected function verifyMimeType( $mime ) {
367 global $wgVerifyMimeType;
368 wfProfileIn( __METHOD__
);
369 if ( $wgVerifyMimeType ) {
370 wfDebug( "\n\nmime: <$mime> extension: <{$this->mFinalExtension}>\n\n" );
371 global $wgMimeTypeBlacklist;
372 if ( $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
373 wfProfileOut( __METHOD__
);
374 return array( 'filetype-badmime', $mime );
378 $fp = fopen( $this->mTempPath
, 'rb' );
379 $chunk = fread( $fp, 256 );
382 $magic = MimeMagic
::singleton();
383 $extMime = $magic->guessTypesForExtension( $this->mFinalExtension
);
384 $ieTypes = $magic->getIEMimeTypes( $this->mTempPath
, $chunk, $extMime );
385 foreach ( $ieTypes as $ieType ) {
386 if ( $this->checkFileExtension( $ieType, $wgMimeTypeBlacklist ) ) {
387 wfProfileOut( __METHOD__
);
388 return array( 'filetype-bad-ie-mime', $ieType );
393 wfProfileOut( __METHOD__
);
399 * Verifies that it's ok to include the uploaded file
401 * @return mixed true of the file is verified, array otherwise.
403 protected function verifyFile() {
404 global $wgVerifyMimeType;
405 wfProfileIn( __METHOD__
);
407 $status = $this->verifyPartialFile();
408 if ( $status !== true ) {
409 wfProfileOut( __METHOD__
);
413 $this->mFileProps
= FSFile
::getPropsFromPath( $this->mTempPath
, $this->mFinalExtension
);
414 $mime = $this->mFileProps
['file-mime'];
416 if ( $wgVerifyMimeType ) {
417 # XXX: Missing extension will be caught by validateName() via getTitle()
418 if ( $this->mFinalExtension
!= '' && !$this->verifyExtension( $mime, $this->mFinalExtension
) ) {
419 wfProfileOut( __METHOD__
);
420 return array( 'filetype-mime-mismatch', $this->mFinalExtension
, $mime );
425 $handler = MediaHandler
::getHandler( $mime );
427 $handlerStatus = $handler->verifyUpload( $this->mTempPath
);
428 if ( !$handlerStatus->isOK() ) {
429 $errors = $handlerStatus->getErrorsArray();
430 wfProfileOut( __METHOD__
);
431 return reset( $errors );
435 wfRunHooks( 'UploadVerifyFile', array( $this, $mime, &$status ) );
436 if ( $status !== true ) {
437 wfProfileOut( __METHOD__
);
441 wfDebug( __METHOD__
. ": all clear; passing.\n" );
442 wfProfileOut( __METHOD__
);
447 * A verification routine suitable for partial files
449 * Runs the blacklist checks, but not any checks that may
450 * assume the entire file is present.
452 * @return Mixed true for valid or array with error message key.
454 protected function verifyPartialFile() {
455 global $wgAllowJavaUploads, $wgDisableUploadScriptChecks;
456 wfProfileIn( __METHOD__
);
458 # getTitle() sets some internal parameters like $this->mFinalExtension
461 $this->mFileProps
= FSFile
::getPropsFromPath( $this->mTempPath
, $this->mFinalExtension
);
463 # check mime type, if desired
464 $mime = $this->mFileProps
['file-mime'];
465 $status = $this->verifyMimeType( $mime );
466 if ( $status !== true ) {
467 wfProfileOut( __METHOD__
);
471 # check for htmlish code and javascript
472 if ( !$wgDisableUploadScriptChecks ) {
473 if ( self
::detectScript( $this->mTempPath
, $mime, $this->mFinalExtension
) ) {
474 wfProfileOut( __METHOD__
);
475 return array( 'uploadscripted' );
477 if ( $this->mFinalExtension
== 'svg' ||
$mime == 'image/svg+xml' ) {
478 if ( $this->detectScriptInSvg( $this->mTempPath
) ) {
479 wfProfileOut( __METHOD__
);
480 return array( 'uploadscripted' );
485 # Check for Java applets, which if uploaded can bypass cross-site
487 if ( !$wgAllowJavaUploads ) {
488 $this->mJavaDetected
= false;
489 $zipStatus = ZipDirectoryReader
::read( $this->mTempPath
,
490 array( $this, 'zipEntryCallback' ) );
491 if ( !$zipStatus->isOK() ) {
492 $errors = $zipStatus->getErrorsArray();
493 $error = reset( $errors );
494 if ( $error[0] !== 'zip-wrong-format' ) {
495 wfProfileOut( __METHOD__
);
499 if ( $this->mJavaDetected
) {
500 wfProfileOut( __METHOD__
);
501 return array( 'uploadjava' );
505 # Scan the uploaded file for viruses
506 $virus = $this->detectVirus( $this->mTempPath
);
508 wfProfileOut( __METHOD__
);
509 return array( 'uploadvirus', $virus );
512 wfProfileOut( __METHOD__
);
517 * Callback for ZipDirectoryReader to detect Java class files.
519 function zipEntryCallback( $entry ) {
520 $names = array( $entry['name'] );
522 // If there is a null character, cut off the name at it, because JDK's
523 // ZIP_GetEntry() uses strcmp() if the name hashes match. If a file name
524 // were constructed which had ".class\0" followed by a string chosen to
525 // make the hash collide with the truncated name, that file could be
526 // returned in response to a request for the .class file.
527 $nullPos = strpos( $entry['name'], "\000" );
528 if ( $nullPos !== false ) {
529 $names[] = substr( $entry['name'], 0, $nullPos );
532 // If there is a trailing slash in the file name, we have to strip it,
533 // because that's what ZIP_GetEntry() does.
534 if ( preg_grep( '!\.class/?$!', $names ) ) {
535 $this->mJavaDetected
= true;
540 * Alias for verifyTitlePermissions. The function was originally 'verifyPermissions'
541 * but that suggests it's checking the user, when it's really checking the title + user combination.
542 * @param $user User object to verify the permissions against
543 * @return mixed An array as returned by getUserPermissionsErrors or true
544 * in case the user has proper permissions.
546 public function verifyPermissions( $user ) {
547 return $this->verifyTitlePermissions( $user );
551 * Check whether the user can edit, upload and create the image. This
552 * checks only against the current title; if it returns errors, it may
553 * very well be that another title will not give errors. Therefore
554 * isAllowed() should be called as well for generic is-user-blocked or
555 * can-user-upload checking.
557 * @param $user User object to verify the permissions against
558 * @return mixed An array as returned by getUserPermissionsErrors or true
559 * in case the user has proper permissions.
561 public function verifyTitlePermissions( $user ) {
563 * If the image is protected, non-sysop users won't be able
564 * to modify it by uploading a new revision.
566 $nt = $this->getTitle();
567 if ( is_null( $nt ) ) {
570 $permErrors = $nt->getUserPermissionsErrors( 'edit', $user );
571 $permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $user );
572 if ( !$nt->exists() ) {
573 $permErrorsCreate = $nt->getUserPermissionsErrors( 'create', $user );
575 $permErrorsCreate = array();
577 if ( $permErrors ||
$permErrorsUpload ||
$permErrorsCreate ) {
578 $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
579 $permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );
583 $overwriteError = $this->checkOverwrite( $user );
584 if ( $overwriteError !== true ) {
585 return array( $overwriteError );
592 * Check for non fatal problems with the file.
594 * This should not assume that mTempPath is set.
596 * @return Array of warnings
598 public function checkWarnings() {
600 wfProfileIn( __METHOD__
);
604 $localFile = $this->getLocalFile();
605 $filename = $localFile->getName();
608 * Check whether the resulting filename is different from the desired one,
609 * but ignore things like ucfirst() and spaces/underscore things
611 $comparableName = str_replace( ' ', '_', $this->mDesiredDestName
);
612 $comparableName = Title
::capitalize( $comparableName, NS_FILE
);
614 if ( $this->mDesiredDestName
!= $filename && $comparableName != $filename ) {
615 $warnings['badfilename'] = $filename;
618 // Check whether the file extension is on the unwanted list
619 global $wgCheckFileExtensions, $wgFileExtensions;
620 if ( $wgCheckFileExtensions ) {
621 if ( !$this->checkFileExtension( $this->mFinalExtension
, $wgFileExtensions ) ) {
622 $warnings['filetype-unwanted-type'] = array( $this->mFinalExtension
,
623 $wgLang->commaList( $wgFileExtensions ), count( $wgFileExtensions ) );
627 global $wgUploadSizeWarning;
628 if ( $wgUploadSizeWarning && ( $this->mFileSize
> $wgUploadSizeWarning ) ) {
629 $warnings['large-file'] = array( $wgUploadSizeWarning, $this->mFileSize
);
632 if ( $this->mFileSize
== 0 ) {
633 $warnings['emptyfile'] = true;
636 $exists = self
::getExistsWarning( $localFile );
637 if ( $exists !== false ) {
638 $warnings['exists'] = $exists;
641 // Check dupes against existing files
642 $hash = $this->getTempFileSha1Base36();
643 $dupes = RepoGroup
::singleton()->findBySha1( $hash );
644 $title = $this->getTitle();
645 // Remove all matches against self
646 foreach ( $dupes as $key => $dupe ) {
647 if ( $title->equals( $dupe->getTitle() ) ) {
648 unset( $dupes[$key] );
652 $warnings['duplicate'] = $dupes;
655 // Check dupes against archives
656 $archivedImage = new ArchivedFile( null, 0, "{$hash}.{$this->mFinalExtension}" );
657 if ( $archivedImage->getID() > 0 ) {
658 $warnings['duplicate-archive'] = $archivedImage->getName();
661 wfProfileOut( __METHOD__
);
666 * Really perform the upload. Stores the file in the local repo, watches
667 * if necessary and runs the UploadComplete hook.
674 * @return Status indicating the whether the upload succeeded.
676 public function performUpload( $comment, $pageText, $watch, $user ) {
677 wfProfileIn( __METHOD__
);
679 $status = $this->getLocalFile()->upload(
689 if ( $status->isGood() ) {
691 WatchAction
::doWatch( $this->getLocalFile()->getTitle(), $user, WatchedItem
::IGNORE_USER_RIGHTS
);
693 wfRunHooks( 'UploadComplete', array( &$this ) );
696 wfProfileOut( __METHOD__
);
701 * Returns the title of the file to be uploaded. Sets mTitleError in case
702 * the name was illegal.
704 * @return Title The title of the file or null in case the name was illegal
706 public function getTitle() {
707 if ( $this->mTitle
!== false ) {
708 return $this->mTitle
;
710 /* Assume that if a user specified File:Something.jpg, this is an error
711 * and that the namespace prefix needs to be stripped of.
713 $title = Title
::newFromText( $this->mDesiredDestName
);
714 if ( $title && $title->getNamespace() == NS_FILE
) {
715 $this->mFilteredName
= $title->getDBkey();
717 $this->mFilteredName
= $this->mDesiredDestName
;
720 # oi_archive_name is max 255 bytes, which include a timestamp and an
721 # exclamation mark, so restrict file name to 240 bytes.
722 if ( strlen( $this->mFilteredName
) > 240 ) {
723 $this->mTitleError
= self
::FILENAME_TOO_LONG
;
724 return $this->mTitle
= null;
728 * Chop off any directories in the given filename. Then
729 * filter out illegal characters, and try to make a legible name
730 * out of it. We'll strip some silently that Title would die on.
732 $this->mFilteredName
= wfStripIllegalFilenameChars( $this->mFilteredName
);
733 /* Normalize to title form before we do any further processing */
734 $nt = Title
::makeTitleSafe( NS_FILE
, $this->mFilteredName
);
735 if ( is_null( $nt ) ) {
736 $this->mTitleError
= self
::ILLEGAL_FILENAME
;
737 return $this->mTitle
= null;
739 $this->mFilteredName
= $nt->getDBkey();
742 * We'll want to blacklist against *any* 'extension', and use
743 * only the final one for the whitelist.
745 list( $partname, $ext ) = $this->splitExtensions( $this->mFilteredName
);
747 if ( count( $ext ) ) {
748 $this->mFinalExtension
= trim( $ext[count( $ext ) - 1] );
750 $this->mFinalExtension
= '';
752 # No extension, try guessing one
753 $magic = MimeMagic
::singleton();
754 $mime = $magic->guessMimeType( $this->mTempPath
);
755 if ( $mime !== 'unknown/unknown' ) {
756 # Get a space separated list of extensions
757 $extList = $magic->getExtensionsForType( $mime );
759 # Set the extension to the canonical extension
760 $this->mFinalExtension
= strtok( $extList, ' ' );
762 # Fix up the other variables
763 $this->mFilteredName
.= ".{$this->mFinalExtension}";
764 $nt = Title
::makeTitleSafe( NS_FILE
, $this->mFilteredName
);
765 $ext = array( $this->mFinalExtension
);
770 /* Don't allow users to override the blacklist (check file extension) */
771 global $wgCheckFileExtensions, $wgStrictFileExtensions;
772 global $wgFileExtensions, $wgFileBlacklist;
774 $blackListedExtensions = $this->checkFileExtensionList( $ext, $wgFileBlacklist );
776 if ( $this->mFinalExtension
== '' ) {
777 $this->mTitleError
= self
::FILETYPE_MISSING
;
778 return $this->mTitle
= null;
779 } elseif ( $blackListedExtensions ||
780 ( $wgCheckFileExtensions && $wgStrictFileExtensions &&
781 !$this->checkFileExtensionList( $ext, $wgFileExtensions ) ) ) {
782 $this->mBlackListedExtensions
= $blackListedExtensions;
783 $this->mTitleError
= self
::FILETYPE_BADTYPE
;
784 return $this->mTitle
= null;
787 // Windows may be broken with special characters, see bug XXX
788 if ( wfIsWindows() && !preg_match( '/^[\x0-\x7f]*$/', $nt->getText() ) ) {
789 $this->mTitleError
= self
::WINDOWS_NONASCII_FILENAME
;
790 return $this->mTitle
= null;
793 # If there was more than one "extension", reassemble the base
794 # filename to prevent bogus complaints about length
795 if ( count( $ext ) > 1 ) {
796 for ( $i = 0; $i < count( $ext ) - 1; $i++
) {
797 $partname .= '.' . $ext[$i];
801 if ( strlen( $partname ) < 1 ) {
802 $this->mTitleError
= self
::MIN_LENGTH_PARTNAME
;
803 return $this->mTitle
= null;
806 return $this->mTitle
= $nt;
810 * Return the local file and initializes if necessary.
812 * @return LocalFile|null
814 public function getLocalFile() {
815 if ( is_null( $this->mLocalFile
) ) {
816 $nt = $this->getTitle();
817 $this->mLocalFile
= is_null( $nt ) ?
null : wfLocalFile( $nt );
819 return $this->mLocalFile
;
823 * If the user does not supply all necessary information in the first upload form submission (either by accident or
824 * by design) then we may want to stash the file temporarily, get more information, and publish the file later.
826 * This method will stash a file in a temporary directory for later processing, and save the necessary descriptive info
828 * This method returns the file object, which also has a 'fileKey' property which can be passed through a form or
829 * API request to find this stashed file again.
832 * @return UploadStashFile stashed file
834 public function stashFile( User
$user = null ) {
835 // was stashSessionFile
836 wfProfileIn( __METHOD__
);
838 $stash = RepoGroup
::singleton()->getLocalRepo()->getUploadStash( $user );
839 $file = $stash->stashFile( $this->mTempPath
, $this->getSourceType() );
840 $this->mLocalFile
= $file;
842 wfProfileOut( __METHOD__
);
847 * Stash a file in a temporary directory, returning a key which can be used to find the file again. See stashFile().
849 * @return String: file key
851 public function stashFileGetKey() {
852 return $this->stashFile()->getFileKey();
856 * alias for stashFileGetKey, for backwards compatibility
858 * @return String: file key
860 public function stashSession() {
861 return $this->stashFileGetKey();
865 * If we've modified the upload file we need to manually remove it
866 * on exit to clean up.
868 public function cleanupTempFile() {
869 if ( $this->mRemoveTempFile
&& $this->mTempPath
&& file_exists( $this->mTempPath
) ) {
870 wfDebug( __METHOD__
. ": Removing temporary file {$this->mTempPath}\n" );
871 unlink( $this->mTempPath
);
875 public function getTempPath() {
876 return $this->mTempPath
;
880 * Split a file into a base name and all dot-delimited 'extensions'
881 * on the end. Some web server configurations will fall back to
882 * earlier pseudo-'extensions' to determine type and execute
883 * scripts, so the blacklist needs to check them all.
885 * @param $filename string
888 public static function splitExtensions( $filename ) {
889 $bits = explode( '.', $filename );
890 $basename = array_shift( $bits );
891 return array( $basename, $bits );
895 * Perform case-insensitive match against a list of file extensions.
896 * Returns true if the extension is in the list.
902 public static function checkFileExtension( $ext, $list ) {
903 return in_array( strtolower( $ext ), $list );
907 * Perform case-insensitive match against a list of file extensions.
908 * Returns an array of matching extensions.
914 public static function checkFileExtensionList( $ext, $list ) {
915 return array_intersect( array_map( 'strtolower', $ext ), $list );
919 * Checks if the mime type of the uploaded file matches the file extension.
921 * @param string $mime the mime type of the uploaded file
922 * @param string $extension the filename extension that the file is to be served with
925 public static function verifyExtension( $mime, $extension ) {
926 $magic = MimeMagic
::singleton();
928 if ( !$mime ||
$mime == 'unknown' ||
$mime == 'unknown/unknown' ) {
929 if ( !$magic->isRecognizableExtension( $extension ) ) {
930 wfDebug( __METHOD__
. ": passing file with unknown detected mime type; " .
931 "unrecognized extension '$extension', can't verify\n" );
934 wfDebug( __METHOD__
. ": rejecting file with unknown detected mime type; " .
935 "recognized extension '$extension', so probably invalid file\n" );
940 $match = $magic->isMatchingExtension( $extension, $mime );
942 if ( $match === null ) {
943 if ( $magic->getTypesForExtension( $extension ) !== null ) {
944 wfDebug( __METHOD__
. ": No extension known for $mime, but we know a mime for $extension\n" );
947 wfDebug( __METHOD__
. ": no file extension known for mime type $mime, passing file\n" );
950 } elseif ( $match === true ) {
951 wfDebug( __METHOD__
. ": mime type $mime matches extension $extension, passing file\n" );
953 #TODO: if it's a bitmap, make sure PHP or ImageMagic resp. can handle it!
957 wfDebug( __METHOD__
. ": mime type $mime mismatches file extension $extension, rejecting file\n" );
963 * Heuristic for detecting files that *could* contain JavaScript instructions or
964 * things that may look like HTML to a browser and are thus
965 * potentially harmful. The present implementation will produce false
966 * positives in some situations.
968 * @param string $file pathname to the temporary upload file
969 * @param string $mime the mime type of the file
970 * @param string $extension the extension of the file
971 * @return Boolean: true if the file contains something looking like embedded scripts
973 public static function detectScript( $file, $mime, $extension ) {
974 global $wgAllowTitlesInSVG;
975 wfProfileIn( __METHOD__
);
977 # ugly hack: for text files, always look at the entire file.
978 # For binary field, just check the first K.
980 if ( strpos( $mime, 'text/' ) === 0 ) {
981 $chunk = file_get_contents( $file );
983 $fp = fopen( $file, 'rb' );
984 $chunk = fread( $fp, 1024 );
988 $chunk = strtolower( $chunk );
991 wfProfileOut( __METHOD__
);
995 # decode from UTF-16 if needed (could be used for obfuscation).
996 if ( substr( $chunk, 0, 2 ) == "\xfe\xff" ) {
998 } elseif ( substr( $chunk, 0, 2 ) == "\xff\xfe" ) {
1005 $chunk = iconv( $enc, "ASCII//IGNORE", $chunk );
1008 $chunk = trim( $chunk );
1010 # @todo FIXME: Convert from UTF-16 if necessary!
1011 wfDebug( __METHOD__
. ": checking for embedded scripts and HTML stuff\n" );
1013 # check for HTML doctype
1014 if ( preg_match( "/<!DOCTYPE *X?HTML/i", $chunk ) ) {
1015 wfProfileOut( __METHOD__
);
1019 // Some browsers will interpret obscure xml encodings as UTF-8, while
1020 // PHP/expat will interpret the given encoding in the xml declaration (bug 47304)
1021 if ( $extension == 'svg' ||
strpos( $mime, 'image/svg' ) === 0 ) {
1022 if ( self
::checkXMLEncodingMissmatch( $file ) ) {
1023 wfProfileOut( __METHOD__
);
1029 * Internet Explorer for Windows performs some really stupid file type
1030 * autodetection which can cause it to interpret valid image files as HTML
1031 * and potentially execute JavaScript, creating a cross-site scripting
1034 * Apple's Safari browser also performs some unsafe file type autodetection
1035 * which can cause legitimate files to be interpreted as HTML if the
1036 * web server is not correctly configured to send the right content-type
1037 * (or if you're really uploading plain text and octet streams!)
1039 * Returns true if IE is likely to mistake the given file for HTML.
1040 * Also returns true if Safari would mistake the given file for HTML
1041 * when served with a generic content-type.
1047 '<html', #also in safari
1050 '<script', #also in safari
1054 if ( !$wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
1058 foreach ( $tags as $tag ) {
1059 if ( false !== strpos( $chunk, $tag ) ) {
1060 wfDebug( __METHOD__
. ": found something that may make it be mistaken for html: $tag\n" );
1061 wfProfileOut( __METHOD__
);
1067 * look for JavaScript
1070 # resolve entity-refs to look at attributes. may be harsh on big files... cache result?
1071 $chunk = Sanitizer
::decodeCharReferences( $chunk );
1073 # look for script-types
1074 if ( preg_match( '!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim', $chunk ) ) {
1075 wfDebug( __METHOD__
. ": found script types\n" );
1076 wfProfileOut( __METHOD__
);
1080 # look for html-style script-urls
1081 if ( preg_match( '!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
1082 wfDebug( __METHOD__
. ": found html-style script urls\n" );
1083 wfProfileOut( __METHOD__
);
1087 # look for css-style script-urls
1088 if ( preg_match( '!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
1089 wfDebug( __METHOD__
. ": found css-style script urls\n" );
1090 wfProfileOut( __METHOD__
);
1094 wfDebug( __METHOD__
. ": no scripts found\n" );
1095 wfProfileOut( __METHOD__
);
1101 * Check a whitelist of xml encodings that are known not to be interpreted differently
1102 * by the server's xml parser (expat) and some common browsers.
1104 * @param string $file pathname to the temporary upload file
1105 * @return Boolean: true if the file contains an encoding that could be misinterpreted
1107 public static function checkXMLEncodingMissmatch( $file ) {
1108 global $wgSVGMetadataCutoff;
1109 $contents = file_get_contents( $file, false, null, -1, $wgSVGMetadataCutoff );
1110 $encodingRegex = '!encoding[ \t\n\r]*=[ \t\n\r]*[\'"](.*?)[\'"]!si';
1112 if ( preg_match( "!<\?xml\b(.*?)\?>!si", $contents, $matches ) ) {
1113 if ( preg_match( $encodingRegex, $matches[1], $encMatch )
1114 && !in_array( strtoupper( $encMatch[1] ), self
::$safeXmlEncodings )
1116 wfDebug( __METHOD__
. ": Found unsafe XML encoding '{$encMatch[1]}'\n" );
1119 } elseif ( preg_match( "!<\?xml\b!si", $contents ) ) {
1120 // Start of XML declaration without an end in the first $wgSVGMetadataCutoff
1121 // bytes. There shouldn't be a legitimate reason for this to happen.
1122 wfDebug( __METHOD__
. ": Unmatched XML declaration start\n" );
1124 } elseif ( substr( $contents, 0, 4 ) == "\x4C\x6F\xA7\x94" ) {
1125 // EBCDIC encoded XML
1126 wfDebug( __METHOD__
. ": EBCDIC Encoded XML\n" );
1130 // It's possible the file is encoded with multi-byte encoding, so re-encode attempt to
1131 // detect the encoding in case is specifies an encoding not whitelisted in self::$safeXmlEncodings
1132 $attemptEncodings = array( 'UTF-16', 'UTF-16BE', 'UTF-32', 'UTF-32BE' );
1133 foreach ( $attemptEncodings as $encoding ) {
1134 wfSuppressWarnings();
1135 $str = iconv( $encoding, 'UTF-8', $contents );
1136 wfRestoreWarnings();
1137 if ( $str != '' && preg_match( "!<\?xml\b(.*?)\?>!si", $str, $matches ) ) {
1138 if ( preg_match( $encodingRegex, $matches[1], $encMatch )
1139 && !in_array( strtoupper( $encMatch[1] ), self
::$safeXmlEncodings )
1141 wfDebug( __METHOD__
. ": Found unsafe XML encoding '{$encMatch[1]}'\n" );
1144 } elseif ( $str != '' && preg_match( "!<\?xml\b!si", $str ) ) {
1145 // Start of XML declaration without an end in the first $wgSVGMetadataCutoff
1146 // bytes. There shouldn't be a legitimate reason for this to happen.
1147 wfDebug( __METHOD__
. ": Unmatched XML declaration start\n" );
1156 * @param $filename string
1159 protected function detectScriptInSvg( $filename ) {
1160 $check = new XmlTypeCheck( $filename, array( $this, 'checkSvgScriptCallback' ) );
1161 return $check->filterMatch
;
1165 * @todo Replace this with a whitelist filter!
1166 * @param $element string
1167 * @param $attribs array
1170 public function checkSvgScriptCallback( $element, $attribs ) {
1171 $strippedElement = $this->stripXmlNamespace( $element );
1174 * check for elements that can contain javascript
1176 if ( $strippedElement == 'script' ) {
1177 wfDebug( __METHOD__
. ": Found script element '$element' in uploaded file.\n" );
1181 # e.g., <svg xmlns="http://www.w3.org/2000/svg"> <handler xmlns:ev="http://www.w3.org/2001/xml-events" ev:event="load">alert(1)</handler> </svg>
1182 if ( $strippedElement == 'handler' ) {
1183 wfDebug( __METHOD__
. ": Found scriptable element '$element' in uploaded file.\n" );
1187 # SVG reported in Feb '12 that used xml:stylesheet to generate javascript block
1188 if ( $strippedElement == 'stylesheet' ) {
1189 wfDebug( __METHOD__
. ": Found scriptable element '$element' in uploaded file.\n" );
1193 foreach ( $attribs as $attrib => $value ) {
1194 $stripped = $this->stripXmlNamespace( $attrib );
1195 $value = strtolower( $value );
1197 if ( substr( $stripped, 0, 2 ) == 'on' ) {
1198 wfDebug( __METHOD__
. ": Found event-handler attribute '$attrib'='$value' in uploaded file.\n" );
1202 # href with javascript target
1203 if ( $stripped == 'href' && strpos( strtolower( $value ), 'javascript:' ) !== false ) {
1204 wfDebug( __METHOD__
. ": Found script in href attribute '$attrib'='$value' in uploaded file.\n" );
1208 # href with embedded svg as target
1209 if ( $stripped == 'href' && preg_match( '!data:[^,]*image/svg[^,]*,!sim', $value ) ) {
1210 wfDebug( __METHOD__
. ": Found href to embedded svg \"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );
1214 # href with embedded (text/xml) svg as target
1215 if ( $stripped == 'href' && preg_match( '!data:[^,]*text/xml[^,]*,!sim', $value ) ) {
1216 wfDebug( __METHOD__
. ": Found href to embedded svg \"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );
1220 # use set/animate to add event-handler attribute to parent
1221 if ( ( $strippedElement == 'set' ||
$strippedElement == 'animate' ) && $stripped == 'attributename' && substr( $value, 0, 2 ) == 'on' ) {
1222 wfDebug( __METHOD__
. ": Found svg setting event-handler attribute with \"<$strippedElement $stripped='$value'...\" in uploaded file.\n" );
1226 # use set to add href attribute to parent element
1227 if ( $strippedElement == 'set' && $stripped == 'attributename' && strpos( $value, 'href' ) !== false ) {
1228 wfDebug( __METHOD__
. ": Found svg setting href attribute '$value' in uploaded file.\n" );
1232 # use set to add a remote / data / script target to an element
1233 if ( $strippedElement == 'set' && $stripped == 'to' && preg_match( '!(http|https|data|script):!sim', $value ) ) {
1234 wfDebug( __METHOD__
. ": Found svg setting attribute to '$value' in uploaded file.\n" );
1238 # use handler attribute with remote / data / script
1239 if ( $stripped == 'handler' && preg_match( '!(http|https|data|script):!sim', $value ) ) {
1240 wfDebug( __METHOD__
. ": Found svg setting handler with remote/data/script '$attrib'='$value' in uploaded file.\n" );
1244 # use CSS styles to bring in remote code
1245 # catch url("http:..., url('http:..., url(http:..., but not url("#..., url('#..., url(#....
1246 if ( $stripped == 'style' && preg_match_all( '!((?:font|clip-path|fill|filter|marker|marker-end|marker-mid|marker-start|mask|stroke)\s*:\s*url\s*\(\s*["\']?\s*[^#]+.*?\))!sim', $value, $matches ) ) {
1247 foreach ( $matches[1] as $match ) {
1248 if ( !preg_match( '!(?:font|clip-path|fill|filter|marker|marker-end|marker-mid|marker-start|mask|stroke)\s*:\s*url\s*\(\s*(#|\'#|"#)!sim', $match ) ) {
1249 wfDebug( __METHOD__
. ": Found svg setting a style with remote url '$attrib'='$value' in uploaded file.\n" );
1255 # image filters can pull in url, which could be svg that executes scripts
1256 if ( $strippedElement == 'image' && $stripped == 'filter' && preg_match( '!url\s*\(!sim', $value ) ) {
1257 wfDebug( __METHOD__
. ": Found image filter with url: \"<$strippedElement $stripped='$value'...\" in uploaded file.\n" );
1263 return false; //No scripts detected
1267 * @param $name string
1270 private function stripXmlNamespace( $name ) {
1271 // 'http://www.w3.org/2000/svg:script' -> 'script'
1272 $parts = explode( ':', strtolower( $name ) );
1273 return array_pop( $parts );
1277 * Generic wrapper function for a virus scanner program.
1278 * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
1279 * $wgAntivirusRequired may be used to deny upload if the scan fails.
1281 * @param string $file pathname to the temporary upload file
1282 * @return mixed false if not virus is found, NULL if the scan fails or is disabled,
1283 * or a string containing feedback from the virus scanner if a virus was found.
1284 * If textual feedback is missing but a virus was found, this function returns true.
1286 public static function detectVirus( $file ) {
1287 global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
1288 wfProfileIn( __METHOD__
);
1290 if ( !$wgAntivirus ) {
1291 wfDebug( __METHOD__
. ": virus scanner disabled\n" );
1292 wfProfileOut( __METHOD__
);
1296 if ( !$wgAntivirusSetup[$wgAntivirus] ) {
1297 wfDebug( __METHOD__
. ": unknown virus scanner: $wgAntivirus\n" );
1298 $wgOut->wrapWikiMsg( "<div class=\"error\">\n$1\n</div>",
1299 array( 'virus-badscanner', $wgAntivirus ) );
1300 wfProfileOut( __METHOD__
);
1301 return wfMessage( 'virus-unknownscanner' )->text() . " $wgAntivirus";
1304 # look up scanner configuration
1305 $command = $wgAntivirusSetup[$wgAntivirus]['command'];
1306 $exitCodeMap = $wgAntivirusSetup[$wgAntivirus]['codemap'];
1307 $msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]['messagepattern'] ) ?
1308 $wgAntivirusSetup[$wgAntivirus]['messagepattern'] : null;
1310 if ( strpos( $command, "%f" ) === false ) {
1311 # simple pattern: append file to scan
1312 $command .= " " . wfEscapeShellArg( $file );
1314 # complex pattern: replace "%f" with file to scan
1315 $command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
1318 wfDebug( __METHOD__
. ": running virus scan: $command \n" );
1320 # execute virus scanner
1323 # NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
1324 # that does not seem to be worth the pain.
1325 # Ask me (Duesentrieb) about it if it's ever needed.
1326 $output = wfShellExec( "$command 2>&1", $exitCode );
1328 # map exit code to AV_xxx constants.
1329 $mappedCode = $exitCode;
1330 if ( $exitCodeMap ) {
1331 if ( isset( $exitCodeMap[$exitCode] ) ) {
1332 $mappedCode = $exitCodeMap[$exitCode];
1333 } elseif ( isset( $exitCodeMap["*"] ) ) {
1334 $mappedCode = $exitCodeMap["*"];
1338 /* NB: AV_NO_VIRUS is 0 but AV_SCAN_FAILED is false,
1339 * so we need the strict equalities === and thus can't use a switch here
1341 if ( $mappedCode === AV_SCAN_FAILED
) {
1342 # scan failed (code was mapped to false by $exitCodeMap)
1343 wfDebug( __METHOD__
. ": failed to scan $file (code $exitCode).\n" );
1345 $output = $wgAntivirusRequired ?
wfMessage( 'virus-scanfailed', array( $exitCode ) )->text() : null;
1346 } elseif ( $mappedCode === AV_SCAN_ABORTED
) {
1347 # scan failed because filetype is unknown (probably imune)
1348 wfDebug( __METHOD__
. ": unsupported file type $file (code $exitCode).\n" );
1350 } elseif ( $mappedCode === AV_NO_VIRUS
) {
1352 wfDebug( __METHOD__
. ": file passed virus scan.\n" );
1355 $output = trim( $output );
1358 $output = true; #if there's no output, return true
1359 } elseif ( $msgPattern ) {
1361 if ( preg_match( $msgPattern, $output, $groups ) ) {
1363 $output = $groups[1];
1368 wfDebug( __METHOD__
. ": FOUND VIRUS! scanner feedback: $output \n" );
1371 wfProfileOut( __METHOD__
);
1376 * Check if there's an overwrite conflict and, if so, if restrictions
1377 * forbid this user from performing the upload.
1381 * @return mixed true on success, array on failure
1383 private function checkOverwrite( $user ) {
1384 // First check whether the local file can be overwritten
1385 $file = $this->getLocalFile();
1386 if ( $file->exists() ) {
1387 if ( !self
::userCanReUpload( $user, $file ) ) {
1388 return array( 'fileexists-forbidden', $file->getName() );
1394 /* Check shared conflicts: if the local file does not exist, but
1395 * wfFindFile finds a file, it exists in a shared repository.
1397 $file = wfFindFile( $this->getTitle() );
1398 if ( $file && !$user->isAllowed( 'reupload-shared' ) ) {
1399 return array( 'fileexists-shared-forbidden', $file->getName() );
1406 * Check if a user is the last uploader
1408 * @param $user User object
1409 * @param string $img image name
1412 public static function userCanReUpload( User
$user, $img ) {
1413 if ( $user->isAllowed( 'reupload' ) ) {
1414 return true; // non-conditional
1416 if ( !$user->isAllowed( 'reupload-own' ) ) {
1419 if ( is_string( $img ) ) {
1420 $img = wfLocalFile( $img );
1422 if ( !( $img instanceof LocalFile
) ) {
1426 return $user->getId() == $img->getUser( 'id' );
1430 * Helper function that does various existence checks for a file.
1431 * The following checks are performed:
1433 * - Article with the same name as the file exists
1434 * - File exists with normalized extension
1435 * - The file looks like a thumbnail and the original exists
1437 * @param $file File The File object to check
1438 * @return mixed False if the file does not exists, else an array
1440 public static function getExistsWarning( $file ) {
1441 if ( $file->exists() ) {
1442 return array( 'warning' => 'exists', 'file' => $file );
1445 if ( $file->getTitle()->getArticleID() ) {
1446 return array( 'warning' => 'page-exists', 'file' => $file );
1449 if ( $file->wasDeleted() && !$file->exists() ) {
1450 return array( 'warning' => 'was-deleted', 'file' => $file );
1453 if ( strpos( $file->getName(), '.' ) == false ) {
1454 $partname = $file->getName();
1457 $n = strrpos( $file->getName(), '.' );
1458 $extension = substr( $file->getName(), $n +
1 );
1459 $partname = substr( $file->getName(), 0, $n );
1461 $normalizedExtension = File
::normalizeExtension( $extension );
1463 if ( $normalizedExtension != $extension ) {
1464 // We're not using the normalized form of the extension.
1465 // Normal form is lowercase, using most common of alternate
1466 // extensions (eg 'jpg' rather than 'JPEG').
1468 // Check for another file using the normalized form...
1469 $nt_lc = Title
::makeTitle( NS_FILE
, "{$partname}.{$normalizedExtension}" );
1470 $file_lc = wfLocalFile( $nt_lc );
1472 if ( $file_lc->exists() ) {
1474 'warning' => 'exists-normalized',
1476 'normalizedFile' => $file_lc
1481 // Check for files with the same name but a different extension
1482 $similarFiles = RepoGroup
::singleton()->getLocalRepo()->findFilesByPrefix(
1483 "{$partname}.", 1 );
1484 if ( count( $similarFiles ) ) {
1486 'warning' => 'exists-normalized',
1488 'normalizedFile' => $similarFiles[0],
1492 if ( self
::isThumbName( $file->getName() ) ) {
1493 # Check for filenames like 50px- or 180px-, these are mostly thumbnails
1494 $nt_thb = Title
::newFromText( substr( $partname, strpos( $partname, '-' ) +
1 ) . '.' . $extension, NS_FILE
);
1495 $file_thb = wfLocalFile( $nt_thb );
1496 if ( $file_thb->exists() ) {
1498 'warning' => 'thumb',
1500 'thumbFile' => $file_thb
1503 // File does not exist, but we just don't like the name
1505 'warning' => 'thumb-name',
1507 'thumbFile' => $file_thb
1512 foreach ( self
::getFilenamePrefixBlacklist() as $prefix ) {
1513 if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
1515 'warning' => 'bad-prefix',
1526 * Helper function that checks whether the filename looks like a thumbnail
1527 * @param $filename string
1530 public static function isThumbName( $filename ) {
1531 $n = strrpos( $filename, '.' );
1532 $partname = $n ?
substr( $filename, 0, $n ) : $filename;
1534 substr( $partname, 3, 3 ) == 'px-' ||
1535 substr( $partname, 2, 3 ) == 'px-'
1537 preg_match( "/[0-9]{2}/", substr( $partname, 0, 2 ) );
1541 * Get a list of blacklisted filename prefixes from [[MediaWiki:Filename-prefix-blacklist]]
1543 * @return array list of prefixes
1545 public static function getFilenamePrefixBlacklist() {
1546 $blacklist = array();
1547 $message = wfMessage( 'filename-prefix-blacklist' )->inContentLanguage();
1548 if ( !$message->isDisabled() ) {
1549 $lines = explode( "\n", $message->plain() );
1550 foreach ( $lines as $line ) {
1551 // Remove comment lines
1552 $comment = substr( trim( $line ), 0, 1 );
1553 if ( $comment == '#' ||
$comment == '' ) {
1556 // Remove additional comments after a prefix
1557 $comment = strpos( $line, '#' );
1558 if ( $comment > 0 ) {
1559 $line = substr( $line, 0, $comment - 1 );
1561 $blacklist[] = trim( $line );
1568 * Gets image info about the file just uploaded.
1570 * Also has the effect of setting metadata to be an 'indexed tag name' in returned API result if
1571 * 'metadata' was requested. Oddly, we have to pass the "result" object down just so it can do that
1572 * with the appropriate format, presumably.
1574 * @param $result ApiResult:
1575 * @return Array: image info
1577 public function getImageInfo( $result ) {
1578 $file = $this->getLocalFile();
1579 // TODO This cries out for refactoring. We really want to say $file->getAllInfo(); here.
1580 // Perhaps "info" methods should be moved into files, and the API should just wrap them in queries.
1581 if ( $file instanceof UploadStashFile
) {
1582 $imParam = ApiQueryStashImageInfo
::getPropertyNames();
1583 $info = ApiQueryStashImageInfo
::getInfo( $file, array_flip( $imParam ), $result );
1585 $imParam = ApiQueryImageInfo
::getPropertyNames();
1586 $info = ApiQueryImageInfo
::getInfo( $file, array_flip( $imParam ), $result );
1592 * @param $error array
1595 public function convertVerifyErrorToStatus( $error ) {
1596 $code = $error['status'];
1597 unset( $code['status'] );
1598 return Status
::newFatal( $this->getVerificationErrorCode( $code ), $error );
1602 * @param $forType null|string
1605 public static function getMaxUploadSize( $forType = null ) {
1606 global $wgMaxUploadSize;
1608 if ( is_array( $wgMaxUploadSize ) ) {
1609 if ( !is_null( $forType ) && isset( $wgMaxUploadSize[$forType] ) ) {
1610 return $wgMaxUploadSize[$forType];
1612 return $wgMaxUploadSize['*'];
1615 return intval( $wgMaxUploadSize );
1620 * Get the current status of a chunked upload (used for polling).
1621 * The status will be read from the *current* user session.
1622 * @param $statusKey string
1623 * @return Array|bool
1625 public static function getSessionStatus( $statusKey ) {
1626 return isset( $_SESSION[self
::SESSION_STATUS_KEY
][$statusKey] )
1627 ?
$_SESSION[self
::SESSION_STATUS_KEY
][$statusKey]
1632 * Set the current status of a chunked upload (used for polling).
1633 * The status will be stored in the *current* user session.
1634 * @param $statusKey string
1635 * @param $value array|false
1638 public static function setSessionStatus( $statusKey, $value ) {
1639 if ( $value === false ) {
1640 unset( $_SESSION[self
::SESSION_STATUS_KEY
][$statusKey] );
1642 $_SESSION[self
::SESSION_STATUS_KEY
][$statusKey] = $value;