includes/api/ApiUpload.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Aug 21, 2008
   6  *
   7  * Copyright © 2008 - 2010 Bryan Tong Minh <Bryan.TongMinh@Gmail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 /**
  28  * @ingroup API
  29  */
  30 class ApiUpload extends ApiBase {
  31
  32         /**
  33          * @var UploadBase
  34          */
  35         protected $mUpload = null;
  36
  37         protected $mParams;
  38
  39         public function __construct( $main, $action ) {
  40                 parent::__construct( $main, $action );
  41         }
  42
  43         public function execute() {
  44                 // Check whether upload is enabled
  45                 if ( !UploadBase::isEnabled() ) {
  46                         $this->dieUsageMsg( 'uploaddisabled' );
  47                 }
  48
  49                 $user = $this->getUser();
  50
  51                 // Parameter handling
  52                 $this->mParams = $this->extractRequestParams();
  53                 $request = $this->getMain()->getRequest();
  54                 // Add the uploaded file to the params array
  55                 $this->mParams['file'] = $request->getFileName( 'file' );
  56                 $this->mParams['chunk'] = $request->getFileName( 'chunk' );
  57
  58                 // Copy the session key to the file key, for backward compatibility.
  59                 if( !$this->mParams['filekey'] && $this->mParams['sessionkey'] ) {
  60                         $this->mParams['filekey'] = $this->mParams['sessionkey'];
  61                 }
  62
  63                 // Select an upload module
  64                 if ( !$this->selectUploadModule() ) {
  65                         // This is not a true upload, but a status request or similar
  66                         return;
  67                 }
  68                 if ( !isset( $this->mUpload ) ) {
  69                         $this->dieUsage( 'No upload module set', 'nomodule' );
  70                 }
  71
  72                 // First check permission to upload
  73                 $this->checkPermissions( $user );
  74
  75                 // Fetch the file
  76                 $status = $this->mUpload->fetchFile();
  77                 if ( !$status->isGood() ) {
  78                         $errors = $status->getErrorsArray();
  79                         $error = array_shift( $errors[0] );
  80                         $this->dieUsage( 'Error fetching file from remote source', $error, 0, $errors[0] );
  81                 }
  82
  83                 // Check if the uploaded file is sane
  84                 if ( $this->mParams['chunk'] ) {
  85                         $maxSize = $this->mUpload->getMaxUploadSize( );
  86                         if( $this->mParams['filesize'] > $maxSize ) {
  87                                 $this->dieUsage( 'The file you submitted was too large', 'file-too-large' );
  88                         }
  89                 } else {
  90                         $this->verifyUpload();
  91                 }
  92
  93                 // Check if the user has the rights to modify or overwrite the requested title
  94                 // (This check is irrelevant if stashing is already requested, since the errors
  95                 //  can always be fixed by changing the title)
  96                 if ( ! $this->mParams['stash'] ) {
  97                         $permErrors = $this->mUpload->verifyTitlePermissions( $user );
  98                         if ( $permErrors !== true ) {
  99                                 $this->dieRecoverableError( $permErrors[0], 'filename' );
 100                         }
 101                 }
 102                 // Get the result based on the current upload context:
 103                 $result = $this->getContextResult();
 104
 105                 if ( $result['result'] === 'Success' ) {
 106                         $result['imageinfo'] = $this->mUpload->getImageInfo( $this->getResult() );
 107                 }
 108
 109                 $this->getResult()->addValue( null, $this->getModuleName(), $result );
 110
 111                 // Cleanup any temporary mess
 112                 $this->mUpload->cleanupTempFile();
 113         }
 114         /**
 115          * Get an uplaod result based on upload context
 116          * @return array
 117          */
 118         private function getContextResult(){
 119                 $warnings = $this->getApiWarnings();
 120                 if ( $warnings ) {
 121                         // Get warnings formated in result array format
 122                         return $this->getWarningsResult( $warnings );
 123                 } elseif ( $this->mParams['chunk'] ) {
 124                         // Add chunk, and get result
 125                         return $this->getChunkResult();
 126                 } elseif ( $this->mParams['stash'] ) {
 127                         // Stash the file and get stash result
 128                         return $this->getStashResult();
 129                 }
 130                 // This is the most common case -- a normal upload with no warnings
 131                 // performUpload will return a formatted properly for the API with status
 132                 return $this->performUpload();
 133         }
 134         /**
 135          * Get Stash Result, throws an expetion if the file could not be stashed.
 136          * @return array
 137          */
 138         private function getStashResult(){
 139                 $result = array ();
 140                 // Some uploads can request they be stashed, so as not to publish them immediately.
 141                 // In this case, a failure to stash ought to be fatal
 142                 try {
 143                         $result['result'] = 'Success';
 144                         $result['filekey'] = $this->performStash();
 145                         $result['sessionkey'] = $result['filekey']; // backwards compatibility
 146                 } catch ( MWException $e ) {
 147                         $this->dieUsage( $e->getMessage(), 'stashfailed' );
 148                 }
 149                 return $result;
 150         }
 151         /**
 152          * Get Warnings Result
 153          * @param $warnings Array of Api upload warnings
 154          * @return array
 155          */
 156         private function getWarningsResult( $warnings ){
 157                 $result = array();
 158                 $result['result'] = 'Warning';
 159                 $result['warnings'] = $warnings;
 160                 // in case the warnings can be fixed with some further user action, let's stash this upload
 161                 // and return a key they can use to restart it
 162                 try {
 163                         $result['filekey'] = $this->performStash();
 164                         $result['sessionkey'] = $result['filekey']; // backwards compatibility
 165                 } catch ( MWException $e ) {
 166                         $result['warnings']['stashfailed'] = $e->getMessage();
 167                 }
 168                 return $result;
 169         }
 170         /**
 171          * Get the result of a chunk upload.
 172          * @return array
 173          */
 174         private function getChunkResult(){
 175                 $result = array();
 176
 177                 $result['result'] = 'Continue';
 178                 $request = $this->getMain()->getRequest();
 179                 $chunkPath = $request->getFileTempname( 'chunk' );
 180                 $chunkSize = $request->getUpload( 'chunk' )->getSize();
 181                 if ($this->mParams['offset'] == 0) {
 182                         $result['filekey'] = $this->performStash();
 183                 } else {
 184                         $status = $this->mUpload->addChunk($chunkPath, $chunkSize,
 185                                                                                 $this->mParams['offset']);
 186                         if ( !$status->isGood() ) {
 187                                 $this->dieUsage( $status->getWikiText(), 'stashfailed' );
 188                                 return ;
 189                         }
 190                         $result['filekey'] = $this->mParams['filekey'];
 191                         // Check we added the last chunk:
 192                         if( $this->mParams['offset'] + $chunkSize == $this->mParams['filesize'] ) {
 193                                 $status = $this->mUpload->concatenateChunks();
 194                                 if ( !$status->isGood() ) {
 195                                         $this->dieUsage( $status->getWikiText(), 'stashfailed' );
 196                                         return ;
 197                                 }
 198                                 $result['result'] = 'Success';
 199                         }
 200                 }
 201                 $result['offset'] = $this->mParams['offset'] + $chunkSize;
 202                 return $result;
 203         }
 204
 205         /**
 206          * Stash the file and return the file key
 207          * Also re-raises exceptions with slightly more informative message strings (useful for API)
 208          * @throws MWException
 209          * @return String file key
 210          */
 211         function performStash() {
 212                 try {
 213                         $stashFile = $this->mUpload->stashFile();
 214
 215                         if ( !$stashFile ) {
 216                                 throw new MWException( 'Invalid stashed file' );
 217                         }
 218                         $fileKey = $stashFile->getFileKey();
 219                 } catch ( MWException $e ) {
 220                         $message = 'Stashing temporary file failed: ' . get_class( $e ) . ' ' . $e->getMessage();
 221                         wfDebug( __METHOD__ . ' ' . $message . "\n");
 222                         throw new MWException( $message );
 223                 }
 224                 return $fileKey;
 225         }
 226
 227         /**
 228          * Throw an error that the user can recover from by providing a better
 229          * value for $parameter
 230          *
 231          * @param $error array Error array suitable for passing to dieUsageMsg()
 232          * @param $parameter string Parameter that needs revising
 233          * @param $data array Optional extra data to pass to the user
 234          * @throws UsageException
 235          */
 236         function dieRecoverableError( $error, $parameter, $data = array() ) {
 237                 try {
 238                         $data['filekey'] = $this->performStash();
 239                         $data['sessionkey'] = $data['filekey'];
 240                 } catch ( MWException $e ) {
 241                         $data['stashfailed'] = $e->getMessage();
 242                 }
 243                 $data['invalidparameter'] = $parameter;
 244
 245                 $parsed = $this->parseMsg( $error );
 246                 $this->dieUsage( $parsed['info'], $parsed['code'], 0, $data );
 247         }
 248
 249         /**
 250          * Select an upload module and set it to mUpload. Dies on failure. If the
 251          * request was a status request and not a true upload, returns false;
 252          * otherwise true
 253          *
 254          * @return bool
 255          */
 256         protected function selectUploadModule() {
 257                 $request = $this->getMain()->getRequest();
 258
 259                 // chunk or one and only one of the following parameters is needed
 260                 if( !$this->mParams['chunk'] ) {
 261                         $this->requireOnlyOneParameter( $this->mParams,
 262                                 'filekey', 'file', 'url', 'statuskey' );
 263                 }
 264
 265                 if ( $this->mParams['statuskey'] ) {
 266                         $this->checkAsyncDownloadEnabled();
 267
 268                         // Status request for an async upload
 269                         $sessionData = UploadFromUrlJob::getSessionData( $this->mParams['statuskey'] );
 270                         if ( !isset( $sessionData['result'] ) ) {
 271                                 $this->dieUsage( 'No result in session data', 'missingresult' );
 272                         }
 273                         if ( $sessionData['result'] == 'Warning' ) {
 274                                 $sessionData['warnings'] = $this->transformWarnings( $sessionData['warnings'] );
 275                                 $sessionData['sessionkey'] = $this->mParams['statuskey'];
 276                         }
 277                         $this->getResult()->addValue( null, $this->getModuleName(), $sessionData );
 278                         return false;
 279
 280                 }
 281
 282                 // The following modules all require the filename parameter to be set
 283                 if ( is_null( $this->mParams['filename'] ) ) {
 284                         $this->dieUsageMsg( array( 'missingparam', 'filename' ) );
 285                 }
 286
 287                 if ( $this->mParams['chunk'] ) {
 288                         // Chunk upload
 289                         $this->mUpload = new UploadFromChunks();
 290                         if( isset( $this->mParams['filekey'] ) ){
 291                                 // handle new chunk
 292                                 $this->mUpload->continueChunks(
 293                                         $this->mParams['filename'],
 294                                         $this->mParams['filekey'],
 295                                         $request->getUpload( 'chunk' )
 296                                 );
 297                         } else {
 298                                 // handle first chunk
 299                                 $this->mUpload->initialize(
 300                                         $this->mParams['filename'],
 301                                         $request->getUpload( 'chunk' )
 302                                 );
 303                         }
 304                 } elseif ( isset( $this->mParams['filekey'] ) ) {
 305                         // Upload stashed in a previous request
 306                         if ( !UploadFromStash::isValidKey( $this->mParams['filekey'] ) ) {
 307                                 $this->dieUsageMsg( 'invalid-file-key' );
 308                         }
 309
 310                         $this->mUpload = new UploadFromStash( $this->getUser() );
 311
 312                         $this->mUpload->initialize( $this->mParams['filekey'], $this->mParams['filename'] );
 313                 } elseif ( isset( $this->mParams['file'] ) ) {
 314                         $this->mUpload = new UploadFromFile();
 315                         $this->mUpload->initialize(
 316                                 $this->mParams['filename'],
 317                                 $request->getUpload( 'file' )
 318                         );
 319                 } elseif ( isset( $this->mParams['url'] ) ) {
 320                         // Make sure upload by URL is enabled:
 321                         if ( !UploadFromUrl::isEnabled() ) {
 322                                 $this->dieUsageMsg( 'copyuploaddisabled' );
 323                         }
 324
 325                         $async = false;
 326                         if ( $this->mParams['asyncdownload'] ) {
 327                                 $this->checkAsyncDownloadEnabled();
 328
 329                                 if ( $this->mParams['leavemessage'] && !$this->mParams['ignorewarnings'] ) {
 330                                         $this->dieUsage( 'Using leavemessage without ignorewarnings is not supported',
 331                                                 'missing-ignorewarnings' );
 332                                 }
 333
 334                                 if ( $this->mParams['leavemessage'] ) {
 335                                         $async = 'async-leavemessage';
 336                                 } else {
 337                                         $async = 'async';
 338                                 }
 339                         }
 340                         $this->mUpload = new UploadFromUrl;
 341                         $this->mUpload->initialize( $this->mParams['filename'],
 342                                 $this->mParams['url'], $async );
 343                 }
 344
 345                 return true;
 346         }
 347
 348         /**
 349          * Checks that the user has permissions to perform this upload.
 350          * Dies with usage message on inadequate permissions.
 351          * @param $user User The user to check.
 352          */
 353         protected function checkPermissions( $user ) {
 354                 // Check whether the user has the appropriate permissions to upload anyway
 355                 $permission = $this->mUpload->isAllowed( $user );
 356
 357                 if ( $permission !== true ) {
 358                         if ( !$user->isLoggedIn() ) {
 359                                 $this->dieUsageMsg( array( 'mustbeloggedin', 'upload' ) );
 360                         } else {
 361                                 $this->dieUsageMsg( 'badaccess-groups' );
 362                         }
 363                 }
 364         }
 365
 366         /**
 367          * Performs file verification, dies on error.
 368          */
 369         protected function verifyUpload( ) {
 370                 global $wgFileExtensions;
 371
 372                 $verification = $this->mUpload->verifyUpload( );
 373                 if ( $verification['status'] === UploadBase::OK ) {
 374                         return;
 375                 }
 376
 377                 // TODO: Move them to ApiBase's message map
 378                 switch( $verification['status'] ) {
 379                         // Recoverable errors
 380                         case UploadBase::MIN_LENGTH_PARTNAME:
 381                                 $this->dieRecoverableError( 'filename-tooshort', 'filename' );
 382                                 break;
 383                         case UploadBase::ILLEGAL_FILENAME:
 384                                 $this->dieRecoverableError( 'illegal-filename', 'filename',
 385                                                 array( 'filename' => $verification['filtered'] ) );
 386                                 break;
 387                         case UploadBase::FILENAME_TOO_LONG:
 388                                 $this->dieRecoverableError( 'filename-toolong', 'filename' );
 389                                 break;
 390                         case UploadBase::FILETYPE_MISSING:
 391                                 $this->dieRecoverableError( 'filetype-missing', 'filename' );
 392                                 break;
 393                         case UploadBase::WINDOWS_NONASCII_FILENAME:
 394                                 $this->dieRecoverableError( 'windows-nonascii-filename', 'filename' );
 395                                 break;
 396
 397                         // Unrecoverable errors
 398                         case UploadBase::EMPTY_FILE:
 399                                 $this->dieUsage( 'The file you submitted was empty', 'empty-file' );
 400                                 break;
 401                         case UploadBase::FILE_TOO_LARGE:
 402                                 $this->dieUsage( 'The file you submitted was too large', 'file-too-large' );
 403                                 break;
 404
 405                         case UploadBase::FILETYPE_BADTYPE:
 406                                 $this->dieUsage( 'This type of file is banned', 'filetype-banned',
 407                                                 0, array(
 408                                                         'filetype' => $verification['finalExt'],
 409                                                         'allowed' => $wgFileExtensions
 410                                                 ) );
 411                                 break;
 412                         case UploadBase::VERIFICATION_ERROR:
 413                                 $this->getResult()->setIndexedTagName( $verification['details'], 'detail' );
 414                                 $this->dieUsage( 'This file did not pass file verification', 'verification-error',
 415                                                 0, array( 'details' => $verification['details'] ) );
 416                                 break;
 417                         case UploadBase::HOOK_ABORTED:
 418                                 $this->dieUsage( "The modification you tried to make was aborted by an extension hook",
 419                                                 'hookaborted', 0, array( 'error' => $verification['error'] ) );
 420                                 break;
 421                         default:
 422                                 $this->dieUsage( 'An unknown error occurred', 'unknown-error',
 423                                                 0, array( 'code' =>  $verification['status'] ) );
 424                                 break;
 425                 }
 426         }
 427
 428
 429         /**
 430          * Check warnings if ignorewarnings is not set.
 431          * Returns a suitable array for inclusion into API results if there were warnings
 432          * Returns the empty array if there were no warnings
 433          *
 434          * @return array
 435          */
 436         protected function getApiWarnings() {
 437                 $warnings = array();
 438
 439                 if ( !$this->mParams['ignorewarnings'] ) {
 440                         $warnings = $this->mUpload->checkWarnings();
 441                 }
 442                 return $this->transformWarnings( $warnings );
 443         }
 444
 445         protected function transformWarnings( $warnings ) {
 446                 if ( $warnings ) {
 447                         // Add indices
 448                         $result = $this->getResult();
 449                         $result->setIndexedTagName( $warnings, 'warning' );
 450
 451                         if ( isset( $warnings['duplicate'] ) ) {
 452                                 $dupes = array();
 453                                 foreach ( $warnings['duplicate'] as $dupe ) {
 454                                         $dupes[] = $dupe->getName();
 455                                 }
 456                                 $result->setIndexedTagName( $dupes, 'duplicate' );
 457                                 $warnings['duplicate'] = $dupes;
 458                         }
 459
 460                         if ( isset( $warnings['exists'] ) ) {
 461                                 $warning = $warnings['exists'];
 462                                 unset( $warnings['exists'] );
 463                                 $warnings[$warning['warning']] = $warning['file']->getName();
 464                         }
 465                 }
 466                 return $warnings;
 467         }
 468
 469
 470         /**
 471          * Perform the actual upload. Returns a suitable result array on success;
 472          * dies on failure.
 473          *
 474          * @return array
 475          */
 476         protected function performUpload() {
 477                 // Use comment as initial page text by default
 478                 if ( is_null( $this->mParams['text'] ) ) {
 479                         $this->mParams['text'] = $this->mParams['comment'];
 480                 }
 481
 482                 $file = $this->mUpload->getLocalFile();
 483                 $watch = $this->getWatchlistValue( $this->mParams['watchlist'], $file->getTitle() );
 484
 485                 // Deprecated parameters
 486                 if ( $this->mParams['watch'] ) {
 487                         $watch = true;
 488                 }
 489
 490                 // No errors, no warnings: do the upload
 491                 $status = $this->mUpload->performUpload( $this->mParams['comment'],
 492                         $this->mParams['text'], $watch, $this->getUser() );
 493
 494                 if ( !$status->isGood() ) {
 495                         $error = $status->getErrorsArray();
 496
 497                         if ( count( $error ) == 1 && $error[0][0] == 'async' ) {
 498                                 // The upload can not be performed right now, because the user
 499                                 // requested so
 500                                 return array(
 501                                         'result' => 'Queued',
 502                                         'statuskey' => $error[0][1],
 503                                 );
 504                         } else {
 505                                 $this->getResult()->setIndexedTagName( $error, 'error' );
 506
 507                                 $this->dieUsage( 'An internal error occurred', 'internal-error', 0, $error );
 508                         }
 509                 }
 510
 511                 $file = $this->mUpload->getLocalFile();
 512
 513                 $result['result'] = 'Success';
 514                 $result['filename'] = $file->getName();
 515
 516                 return $result;
 517         }
 518
 519         /**
 520          * Checks if asynchronous copy uploads are enabled and throws an error if they are not.
 521          */
 522         protected function checkAsyncDownloadEnabled() {
 523                 global $wgAllowAsyncCopyUploads;
 524                 if ( !$wgAllowAsyncCopyUploads ) {
 525                         $this->dieUsage( 'Asynchronous copy uploads disabled', 'asynccopyuploaddisabled');
 526                 }
 527         }
 528
 529         public function mustBePosted() {
 530                 return true;
 531         }
 532
 533         public function isWriteMode() {
 534                 return true;
 535         }
 536
 537         public function getAllowedParams() {
 538                 $params = array(
 539                         'filename' => array(
 540                                 ApiBase::PARAM_TYPE => 'string',
 541                         ),
 542                         'comment' => array(
 543                                 ApiBase::PARAM_DFLT => ''
 544                         ),
 545                         'text' => null,
 546                         'token' => null,
 547                         'watch' => array(
 548                                 ApiBase::PARAM_DFLT => false,
 549                                 ApiBase::PARAM_DEPRECATED => true,
 550                         ),
 551                         'watchlist' => array(
 552                                 ApiBase::PARAM_DFLT => 'preferences',
 553                                 ApiBase::PARAM_TYPE => array(
 554                                         'watch',
 555                                         'preferences',
 556                                         'nochange'
 557                                 ),
 558                         ),
 559                         'ignorewarnings' => false,
 560                         'file' => null,
 561                         'url' => null,
 562                         'filekey' => null,
 563                         'sessionkey' => array(
 564                                 ApiBase::PARAM_DFLT => null,
 565                                 ApiBase::PARAM_DEPRECATED => true,
 566                         ),
 567                         'stash' => false,
 568
 569                         'filesize' => null,
 570                         'offset' => null,
 571                         'chunk' => null,
 572
 573                         'asyncdownload' => false,
 574                         'leavemessage' => false,
 575                         'statuskey' => null,
 576                 );
 577
 578                 return $params;
 579         }
 580
 581         public function getParamDescription() {
 582                 $params = array(
 583                         'filename' => 'Target filename',
 584                         'token' => 'Edit token. You can get one of these through prop=info',
 585                         'comment' => 'Upload comment. Also used as the initial page text for new files if "text" is not specified',
 586                         'text' => 'Initial page text for new files',
 587                         'watch' => 'Watch the page',
 588                         'watchlist' => 'Unconditionally add or remove the page from your watchlist, use preferences or do not change watch',
 589                         'ignorewarnings' => 'Ignore any warnings',
 590                         'file' => 'File contents',
 591                         'url' => 'URL to fetch the file from',
 592                         'filekey' => 'Key that identifies a previous upload that was stashed temporarily.',
 593                         'sessionkey' => 'Same as filekey, maintained for backward compatibility.',
 594                         'stash' => 'If set, the server will not add the file to the repository and stash it temporarily.',
 595
 596                         'chunk' => 'Chunk contents',
 597                         'offset' => 'Offset of chunk in bytes',
 598                         'filesize' => 'Filesize of entire upload',
 599
 600                         'asyncdownload' => 'Make fetching a URL asynchronous',
 601                         'leavemessage' => 'If asyncdownload is used, leave a message on the user talk page if finished',
 602                         'statuskey' => 'Fetch the upload status for this file key',
 603                 );
 604
 605                 return $params;
 606
 607         }
 608
 609         public function getDescription() {
 610                 return array(
 611                         'Upload a file, or get the status of pending uploads. Several methods are available:',
 612                         ' * Upload file contents directly, using the "file" parameter',
 613                         ' * Have the MediaWiki server fetch a file from a URL, using the "url" parameter',
 614                         ' * Complete an earlier upload that failed due to warnings, using the "filekey" parameter',
 615                         'Note that the HTTP POST must be done as a file upload (i.e. using multipart/form-data) when',
 616                         'sending the "file".  Also you must get and send an edit token before doing any upload stuff'
 617                 );
 618         }
 619
 620         public function getPossibleErrors() {
 621                 return array_merge( parent::getPossibleErrors(),
 622                         $this->getRequireOnlyOneParameterErrorMessages( array( 'filekey', 'file', 'url', 'statuskey' ) ),
 623                         array(
 624                                 array( 'uploaddisabled' ),
 625                                 array( 'invalid-file-key' ),
 626                                 array( 'uploaddisabled' ),
 627                                 array( 'mustbeloggedin', 'upload' ),
 628                                 array( 'badaccess-groups' ),
 629                                 array( 'code' => 'fetchfileerror', 'info' => '' ),
 630                                 array( 'code' => 'nomodule', 'info' => 'No upload module set' ),
 631                                 array( 'code' => 'empty-file', 'info' => 'The file you submitted was empty' ),
 632                                 array( 'code' => 'filetype-missing', 'info' => 'The file is missing an extension' ),
 633                                 array( 'code' => 'filename-tooshort', 'info' => 'The filename is too short' ),
 634                                 array( 'code' => 'overwrite', 'info' => 'Overwriting an existing file is not allowed' ),
 635                                 array( 'code' => 'stashfailed', 'info' => 'Stashing temporary file failed' ),
 636                                 array( 'code' => 'internal-error', 'info' => 'An internal error occurred' ),
 637                                 array( 'code' => 'asynccopyuploaddisabled', 'info' => 'Asynchronous copy uploads disabled' ),
 638                         )
 639                 );
 640         }
 641
 642         public function needsToken() {
 643                 return true;
 644         }
 645
 646         public function getTokenSalt() {
 647                 return '';
 648         }
 649
 650         public function getExamples() {
 651                 return array(
 652                         'api.php?action=upload&filename=Wiki.png&url=http%3A//upload.wikimedia.org/wikipedia/en/b/bc/Wiki.png'
 653                                 => 'Upload from a URL',
 654                         'api.php?action=upload&filename=Wiki.png&filekey=filekey&ignorewarnings=1'
 655                                 => 'Complete an upload that failed due to warnings',
 656                 );
 657         }
 658
 659         public function getHelpUrls() {
 660                 return 'https://www.mediawiki.org/wiki/API:Upload';
 661         }
 662
 663         public function getVersion() {
 664                 return __CLASS__ . ': $Id$';
 665         }
 666 }