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