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         /** @var UploadBase */
  32         protected $mUpload = null;
  33
  34         protected $mParams;
  35
  36         public function execute() {
  37                 global $wgEnableAsyncUploads;
  38
  39                 // Check whether upload is enabled
  40                 if ( !UploadBase::isEnabled() ) {
  41                         $this->dieUsageMsg( 'uploaddisabled' );
  42                 }
  43
  44                 $user = $this->getUser();
  45
  46                 // Parameter handling
  47                 $this->mParams = $this->extractRequestParams();
  48                 $request = $this->getMain()->getRequest();
  49                 // Check if async mode is actually supported (jobs done in cli mode)
  50                 $this->mParams['async'] = ( $this->mParams['async'] && $wgEnableAsyncUploads );
  51                 // Add the uploaded file to the params array
  52                 $this->mParams['file'] = $request->getFileName( 'file' );
  53                 $this->mParams['chunk'] = $request->getFileName( 'chunk' );
  54
  55                 // Copy the session key to the file key, for backward compatibility.
  56                 if ( !$this->mParams['filekey'] && $this->mParams['sessionkey'] ) {
  57                         $this->mParams['filekey'] = $this->mParams['sessionkey'];
  58                 }
  59
  60                 // Select an upload module
  61                 try {
  62                         if ( !$this->selectUploadModule() ) {
  63                                 return; // not a true upload, but a status request or similar
  64                         } elseif ( !isset( $this->mUpload ) ) {
  65                                 $this->dieUsage( 'No upload module set', 'nomodule' );
  66                         }
  67                 } catch ( UploadStashException $e ) { // XXX: don't spam exception log
  68                         $this->dieUsage( get_class( $e ) . ": " . $e->getMessage(), 'stasherror' );
  69                 }
  70
  71                 // First check permission to upload
  72                 $this->checkPermissions( $user );
  73
  74                 // Fetch the file (usually a no-op)
  75                 /** @var $status Status */
  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                                 $this->dieUsage( 'The file you submitted was too large', 'file-too-large' );
  88                         }
  89                         if ( !$this->mUpload->getTitle() ) {
  90                                 $this->dieUsage( 'Invalid file title supplied', 'internal-error' );
  91                         }
  92                 } elseif ( $this->mParams['async'] && $this->mParams['filekey'] ) {
  93                         // defer verification to background process
  94                 } else {
  95                         wfDebug( __METHOD__ . " about to verify\n" );
  96                         $this->verifyUpload();
  97                 }
  98
  99                 // Check if the user has the rights to modify or overwrite the requested title
 100                 // (This check is irrelevant if stashing is already requested, since the errors
 101                 //  can always be fixed by changing the title)
 102                 if ( !$this->mParams['stash'] ) {
 103                         $permErrors = $this->mUpload->verifyTitlePermissions( $user );
 104                         if ( $permErrors !== true ) {
 105                                 $this->dieRecoverableError( $permErrors[0], 'filename' );
 106                         }
 107                 }
 108
 109                 // Get the result based on the current upload context:
 110                 try {
 111                         $result = $this->getContextResult();
 112                         if ( $result['result'] === 'Success' ) {
 113                                 $result['imageinfo'] = $this->mUpload->getImageInfo( $this->getResult() );
 114                         }
 115                 } catch ( UploadStashException $e ) { // XXX: don't spam exception log
 116                         $this->dieUsage( get_class( $e ) . ": " . $e->getMessage(), 'stasherror' );
 117                 }
 118
 119                 $this->getResult()->addValue( null, $this->getModuleName(), $result );
 120
 121                 // Cleanup any temporary mess
 122                 $this->mUpload->cleanupTempFile();
 123         }
 124
 125         /**
 126          * Get an upload result based on upload context
 127          * @return array
 128          */
 129         private function getContextResult() {
 130                 $warnings = $this->getApiWarnings();
 131                 if ( $warnings && !$this->mParams['ignorewarnings'] ) {
 132                         // Get warnings formatted in result array format
 133                         return $this->getWarningsResult( $warnings );
 134                 } elseif ( $this->mParams['chunk'] ) {
 135                         // Add chunk, and get result
 136                         return $this->getChunkResult( $warnings );
 137                 } elseif ( $this->mParams['stash'] ) {
 138                         // Stash the file and get stash result
 139                         return $this->getStashResult( $warnings );
 140                 }
 141
 142                 // This is the most common case -- a normal upload with no warnings
 143                 // performUpload will return a formatted properly for the API with status
 144                 return $this->performUpload( $warnings );
 145         }
 146
 147         /**
 148          * Get Stash Result, throws an exception if the file could not be stashed.
 149          * @param array $warnings Array of Api upload warnings
 150          * @return array
 151          */
 152         private function getStashResult( $warnings ) {
 153                 $result = array();
 154                 // Some uploads can request they be stashed, so as not to publish them immediately.
 155                 // In this case, a failure to stash ought to be fatal
 156                 try {
 157                         $result['result'] = 'Success';
 158                         $result['filekey'] = $this->performStash();
 159                         $result['sessionkey'] = $result['filekey']; // backwards compatibility
 160                         if ( $warnings && count( $warnings ) > 0 ) {
 161                                 $result['warnings'] = $warnings;
 162                         }
 163                 } catch ( MWException $e ) {
 164                         $this->dieUsage( $e->getMessage(), 'stashfailed' );
 165                 }
 166
 167                 return $result;
 168         }
 169
 170         /**
 171          * Get Warnings Result
 172          * @param array $warnings Array of Api upload warnings
 173          * @return array
 174          */
 175         private function getWarningsResult( $warnings ) {
 176                 $result = array();
 177                 $result['result'] = 'Warning';
 178                 $result['warnings'] = $warnings;
 179                 // in case the warnings can be fixed with some further user action, let's stash this upload
 180                 // and return a key they can use to restart it
 181                 try {
 182                         $result['filekey'] = $this->performStash();
 183                         $result['sessionkey'] = $result['filekey']; // backwards compatibility
 184                 } catch ( MWException $e ) {
 185                         $result['warnings']['stashfailed'] = $e->getMessage();
 186                 }
 187
 188                 return $result;
 189         }
 190
 191         /**
 192          * Get the result of a chunk upload.
 193          * @param array $warnings Array of Api upload warnings
 194          * @return array
 195          */
 196         private function getChunkResult( $warnings ) {
 197                 $result = array();
 198
 199                 $result['result'] = 'Continue';
 200                 if ( $warnings && count( $warnings ) > 0 ) {
 201                         $result['warnings'] = $warnings;
 202                 }
 203                 $request = $this->getMain()->getRequest();
 204                 $chunkPath = $request->getFileTempname( 'chunk' );
 205                 $chunkSize = $request->getUpload( 'chunk' )->getSize();
 206                 if ( $this->mParams['offset'] == 0 ) {
 207                         try {
 208                                 $filekey = $this->performStash();
 209                         } catch ( MWException $e ) {
 210                                 // FIXME: Error handling here is wrong/different from rest of this
 211                                 $this->dieUsage( $e->getMessage(), 'stashfailed' );
 212                         }
 213                 } else {
 214                         $filekey = $this->mParams['filekey'];
 215                         /** @var $status Status */
 216                         $status = $this->mUpload->addChunk(
 217                                 $chunkPath, $chunkSize, $this->mParams['offset'] );
 218                         if ( !$status->isGood() ) {
 219                                 $this->dieUsage( $status->getWikiText(), 'stashfailed' );
 220
 221                                 return array();
 222                         }
 223                 }
 224
 225                 // Check we added the last chunk:
 226                 if ( $this->mParams['offset'] + $chunkSize == $this->mParams['filesize'] ) {
 227                         if ( $this->mParams['async'] ) {
 228                                 $progress = UploadBase::getSessionStatus( $filekey );
 229                                 if ( $progress && $progress['result'] === 'Poll' ) {
 230                                         $this->dieUsage( "Chunk assembly already in progress.", 'stashfailed' );
 231                                 }
 232                                 UploadBase::setSessionStatus(
 233                                         $filekey,
 234                                         array( 'result' => 'Poll',
 235                                                 'stage' => 'queued', 'status' => Status::newGood() )
 236                                 );
 237                                 JobQueueGroup::singleton()->push( new AssembleUploadChunksJob(
 238                                         Title::makeTitle( NS_FILE, $filekey ),
 239                                         array(
 240                                                 'filename' => $this->mParams['filename'],
 241                                                 'filekey' => $filekey,
 242                                                 'session' => $this->getContext()->exportSession()
 243                                         )
 244                                 ) );
 245                                 $result['result'] = 'Poll';
 246                         } else {
 247                                 $status = $this->mUpload->concatenateChunks();
 248                                 if ( !$status->isGood() ) {
 249                                         $this->dieUsage( $status->getWikiText(), 'stashfailed' );
 250
 251                                         return array();
 252                                 }
 253
 254                                 // The fully concatenated file has a new filekey. So remove
 255                                 // the old filekey and fetch the new one.
 256                                 $this->mUpload->stash->removeFile( $filekey );
 257                                 $filekey = $this->mUpload->getLocalFile()->getFileKey();
 258
 259                                 $result['result'] = 'Success';
 260                         }
 261                 }
 262                 $result['filekey'] = $filekey;
 263                 $result['offset'] = $this->mParams['offset'] + $chunkSize;
 264
 265                 return $result;
 266         }
 267
 268         /**
 269          * Stash the file and return the file key
 270          * Also re-raises exceptions with slightly more informative message strings (useful for API)
 271          * @throws MWException
 272          * @return string File key
 273          */
 274         private function performStash() {
 275                 try {
 276                         $stashFile = $this->mUpload->stashFile();
 277
 278                         if ( !$stashFile ) {
 279                                 throw new MWException( 'Invalid stashed file' );
 280                         }
 281                         $fileKey = $stashFile->getFileKey();
 282                 } catch ( MWException $e ) {
 283                         $message = 'Stashing temporary file failed: ' . get_class( $e ) . ' ' . $e->getMessage();
 284                         wfDebug( __METHOD__ . ' ' . $message . "\n" );
 285                         throw new MWException( $message );
 286                 }
 287
 288                 return $fileKey;
 289         }
 290
 291         /**
 292          * Throw an error that the user can recover from by providing a better
 293          * value for $parameter
 294          *
 295          * @param array $error Error array suitable for passing to dieUsageMsg()
 296          * @param string $parameter Parameter that needs revising
 297          * @param array $data Optional extra data to pass to the user
 298          * @throws UsageException
 299          */
 300         private function dieRecoverableError( $error, $parameter, $data = array() ) {
 301                 try {
 302                         $data['filekey'] = $this->performStash();
 303                         $data['sessionkey'] = $data['filekey'];
 304                 } catch ( MWException $e ) {
 305                         $data['stashfailed'] = $e->getMessage();
 306                 }
 307                 $data['invalidparameter'] = $parameter;
 308
 309                 $parsed = $this->parseMsg( $error );
 310                 $this->dieUsage( $parsed['info'], $parsed['code'], 0, $data );
 311         }
 312
 313         /**
 314          * Select an upload module and set it to mUpload. Dies on failure. If the
 315          * request was a status request and not a true upload, returns false;
 316          * otherwise true
 317          *
 318          * @return bool
 319          */
 320         protected function selectUploadModule() {
 321                 $request = $this->getMain()->getRequest();
 322
 323                 // chunk or one and only one of the following parameters is needed
 324                 if ( !$this->mParams['chunk'] ) {
 325                         $this->requireOnlyOneParameter( $this->mParams,
 326                                 'filekey', 'file', 'url', 'statuskey' );
 327                 }
 328
 329                 // Status report for "upload to stash"/"upload from stash"
 330                 if ( $this->mParams['filekey'] && $this->mParams['checkstatus'] ) {
 331                         $progress = UploadBase::getSessionStatus( $this->mParams['filekey'] );
 332                         if ( !$progress ) {
 333                                 $this->dieUsage( 'No result in status data', 'missingresult' );
 334                         } elseif ( !$progress['status']->isGood() ) {
 335                                 $this->dieUsage( $progress['status']->getWikiText(), 'stashfailed' );
 336                         }
 337                         if ( isset( $progress['status']->value['verification'] ) ) {
 338                                 $this->checkVerification( $progress['status']->value['verification'] );
 339                         }
 340                         unset( $progress['status'] ); // remove Status object
 341                         $this->getResult()->addValue( null, $this->getModuleName(), $progress );
 342
 343                         return false;
 344                 }
 345
 346                 if ( $this->mParams['statuskey'] ) {
 347                         $this->checkAsyncDownloadEnabled();
 348
 349                         // Status request for an async upload
 350                         $sessionData = UploadFromUrlJob::getSessionData( $this->mParams['statuskey'] );
 351                         if ( !isset( $sessionData['result'] ) ) {
 352                                 $this->dieUsage( 'No result in session data', 'missingresult' );
 353                         }
 354                         if ( $sessionData['result'] == 'Warning' ) {
 355                                 $sessionData['warnings'] = $this->transformWarnings( $sessionData['warnings'] );
 356                                 $sessionData['sessionkey'] = $this->mParams['statuskey'];
 357                         }
 358                         $this->getResult()->addValue( null, $this->getModuleName(), $sessionData );
 359
 360                         return false;
 361                 }
 362
 363                 // The following modules all require the filename parameter to be set
 364                 if ( is_null( $this->mParams['filename'] ) ) {
 365                         $this->dieUsageMsg( array( 'missingparam', 'filename' ) );
 366                 }
 367
 368                 if ( $this->mParams['chunk'] ) {
 369                         // Chunk upload
 370                         $this->mUpload = new UploadFromChunks();
 371                         if ( isset( $this->mParams['filekey'] ) ) {
 372                                 // handle new chunk
 373                                 $this->mUpload->continueChunks(
 374                                         $this->mParams['filename'],
 375                                         $this->mParams['filekey'],
 376                                         $request->getUpload( 'chunk' )
 377                                 );
 378                         } else {
 379                                 // handle first chunk
 380                                 $this->mUpload->initialize(
 381                                         $this->mParams['filename'],
 382                                         $request->getUpload( 'chunk' )
 383                                 );
 384                         }
 385                 } elseif ( isset( $this->mParams['filekey'] ) ) {
 386                         // Upload stashed in a previous request
 387                         if ( !UploadFromStash::isValidKey( $this->mParams['filekey'] ) ) {
 388                                 $this->dieUsageMsg( 'invalid-file-key' );
 389                         }
 390
 391                         $this->mUpload = new UploadFromStash( $this->getUser() );
 392                         // This will not download the temp file in initialize() in async mode.
 393                         // We still have enough information to call checkWarnings() and such.
 394                         $this->mUpload->initialize(
 395                                 $this->mParams['filekey'], $this->mParams['filename'], !$this->mParams['async']
 396                         );
 397                 } elseif ( isset( $this->mParams['file'] ) ) {
 398                         $this->mUpload = new UploadFromFile();
 399                         $this->mUpload->initialize(
 400                                 $this->mParams['filename'],
 401                                 $request->getUpload( 'file' )
 402                         );
 403                 } elseif ( isset( $this->mParams['url'] ) ) {
 404                         // Make sure upload by URL is enabled:
 405                         if ( !UploadFromUrl::isEnabled() ) {
 406                                 $this->dieUsageMsg( 'copyuploaddisabled' );
 407                         }
 408
 409                         if ( !UploadFromUrl::isAllowedHost( $this->mParams['url'] ) ) {
 410                                 $this->dieUsageMsg( 'copyuploadbaddomain' );
 411                         }
 412
 413                         if ( !UploadFromUrl::isAllowedUrl( $this->mParams['url'] ) ) {
 414                                 $this->dieUsageMsg( 'copyuploadbadurl' );
 415                         }
 416
 417                         $async = false;
 418                         if ( $this->mParams['asyncdownload'] ) {
 419                                 $this->checkAsyncDownloadEnabled();
 420
 421                                 if ( $this->mParams['leavemessage'] && !$this->mParams['ignorewarnings'] ) {
 422                                         $this->dieUsage( 'Using leavemessage without ignorewarnings is not supported',
 423                                                 'missing-ignorewarnings' );
 424                                 }
 425
 426                                 if ( $this->mParams['leavemessage'] ) {
 427                                         $async = 'async-leavemessage';
 428                                 } else {
 429                                         $async = 'async';
 430                                 }
 431                         }
 432                         $this->mUpload = new UploadFromUrl;
 433                         $this->mUpload->initialize( $this->mParams['filename'],
 434                                 $this->mParams['url'], $async );
 435                 }
 436
 437                 return true;
 438         }
 439
 440         /**
 441          * Checks that the user has permissions to perform this upload.
 442          * Dies with usage message on inadequate permissions.
 443          * @param User $user The user to check.
 444          */
 445         protected function checkPermissions( $user ) {
 446                 // Check whether the user has the appropriate permissions to upload anyway
 447                 $permission = $this->mUpload->isAllowed( $user );
 448
 449                 if ( $permission !== true ) {
 450                         if ( !$user->isLoggedIn() ) {
 451                                 $this->dieUsageMsg( array( 'mustbeloggedin', 'upload' ) );
 452                         }
 453
 454                         $this->dieUsageMsg( 'badaccess-groups' );
 455                 }
 456         }
 457
 458         /**
 459          * Performs file verification, dies on error.
 460          */
 461         protected function verifyUpload() {
 462                 $verification = $this->mUpload->verifyUpload();
 463                 if ( $verification['status'] === UploadBase::OK ) {
 464                         return;
 465                 }
 466
 467                 $this->checkVerification( $verification );
 468         }
 469
 470         /**
 471          * Performs file verification, dies on error.
 472          */
 473         protected function checkVerification( array $verification ) {
 474                 global $wgFileExtensions;
 475
 476                 // @todo Move them to ApiBase's message map
 477                 switch ( $verification['status'] ) {
 478                         // Recoverable errors
 479                         case UploadBase::MIN_LENGTH_PARTNAME:
 480                                 $this->dieRecoverableError( 'filename-tooshort', 'filename' );
 481                                 break;
 482                         case UploadBase::ILLEGAL_FILENAME:
 483                                 $this->dieRecoverableError( 'illegal-filename', 'filename',
 484                                         array( 'filename' => $verification['filtered'] ) );
 485                                 break;
 486                         case UploadBase::FILENAME_TOO_LONG:
 487                                 $this->dieRecoverableError( 'filename-toolong', 'filename' );
 488                                 break;
 489                         case UploadBase::FILETYPE_MISSING:
 490                                 $this->dieRecoverableError( 'filetype-missing', 'filename' );
 491                                 break;
 492                         case UploadBase::WINDOWS_NONASCII_FILENAME:
 493                                 $this->dieRecoverableError( 'windows-nonascii-filename', 'filename' );
 494                                 break;
 495
 496                         // Unrecoverable errors
 497                         case UploadBase::EMPTY_FILE:
 498                                 $this->dieUsage( 'The file you submitted was empty', 'empty-file' );
 499                                 break;
 500                         case UploadBase::FILE_TOO_LARGE:
 501                                 $this->dieUsage( 'The file you submitted was too large', 'file-too-large' );
 502                                 break;
 503
 504                         case UploadBase::FILETYPE_BADTYPE:
 505                                 $extradata = array(
 506                                         'filetype' => $verification['finalExt'],
 507                                         'allowed' => array_values( array_unique( $wgFileExtensions ) )
 508                                 );
 509                                 $this->getResult()->setIndexedTagName( $extradata['allowed'], 'ext' );
 510
 511                                 $msg = "Filetype not permitted: ";
 512                                 if ( isset( $verification['blacklistedExt'] ) ) {
 513                                         $msg .= join( ', ', $verification['blacklistedExt'] );
 514                                         $extradata['blacklisted'] = array_values( $verification['blacklistedExt'] );
 515                                         $this->getResult()->setIndexedTagName( $extradata['blacklisted'], 'ext' );
 516                                 } else {
 517                                         $msg .= $verification['finalExt'];
 518                                 }
 519                                 $this->dieUsage( $msg, 'filetype-banned', 0, $extradata );
 520                                 break;
 521                         case UploadBase::VERIFICATION_ERROR:
 522                                 $this->getResult()->setIndexedTagName( $verification['details'], 'detail' );
 523                                 $this->dieUsage( 'This file did not pass file verification', 'verification-error',
 524                                         0, array( 'details' => $verification['details'] ) );
 525                                 break;
 526                         case UploadBase::HOOK_ABORTED:
 527                                 $this->dieUsage( "The modification you tried to make was aborted by an extension hook",
 528                                         'hookaborted', 0, array( 'error' => $verification['error'] ) );
 529                                 break;
 530                         default:
 531                                 $this->dieUsage( 'An unknown error occurred', 'unknown-error',
 532                                         0, array( 'code' => $verification['status'] ) );
 533                                 break;
 534                 }
 535         }
 536
 537         /**
 538          * Check warnings.
 539          * Returns a suitable array for inclusion into API results if there were warnings
 540          * Returns the empty array if there were no warnings
 541          *
 542          * @return array
 543          */
 544         protected function getApiWarnings() {
 545                 $warnings = $this->mUpload->checkWarnings();
 546
 547                 return $this->transformWarnings( $warnings );
 548         }
 549
 550         protected function transformWarnings( $warnings ) {
 551                 if ( $warnings ) {
 552                         // Add indices
 553                         $result = $this->getResult();
 554                         $result->setIndexedTagName( $warnings, 'warning' );
 555
 556                         if ( isset( $warnings['duplicate'] ) ) {
 557                                 $dupes = array();
 558                                 foreach ( $warnings['duplicate'] as $dupe ) {
 559                                         $dupes[] = $dupe->getName();
 560                                 }
 561                                 $result->setIndexedTagName( $dupes, 'duplicate' );
 562                                 $warnings['duplicate'] = $dupes;
 563                         }
 564
 565                         if ( isset( $warnings['exists'] ) ) {
 566                                 $warning = $warnings['exists'];
 567                                 unset( $warnings['exists'] );
 568                                 $localFile = isset( $warning['normalizedFile'] )
 569                                         ? $warning['normalizedFile']
 570                                         : $warning['file'];
 571                                 $warnings[$warning['warning']] = $localFile->getName();
 572                         }
 573                 }
 574
 575                 return $warnings;
 576         }
 577
 578         /**
 579          * Perform the actual upload. Returns a suitable result array on success;
 580          * dies on failure.
 581          *
 582          * @param array $warnings Array of Api upload warnings
 583          * @return array
 584          */
 585         protected function performUpload( $warnings ) {
 586                 // Use comment as initial page text by default
 587                 if ( is_null( $this->mParams['text'] ) ) {
 588                         $this->mParams['text'] = $this->mParams['comment'];
 589                 }
 590
 591                 /** @var $file File */
 592                 $file = $this->mUpload->getLocalFile();
 593
 594                 // For preferences mode, we want to watch if 'watchdefault' is set or
 595                 // if the *file* doesn't exist and 'watchcreations' is set. But
 596                 // getWatchlistValue()'s automatic handling checks if the *title*
 597                 // exists or not, so we need to check both prefs manually.
 598                 $watch = $this->getWatchlistValue(
 599                         $this->mParams['watchlist'], $file->getTitle(), 'watchdefault'
 600                 );
 601                 if ( !$watch && $this->mParams['watchlist'] == 'preferences' && !$file->exists() ) {
 602                         $watch = $this->getWatchlistValue(
 603                                 $this->mParams['watchlist'], $file->getTitle(), 'watchcreations'
 604                         );
 605                 }
 606
 607                 // Deprecated parameters
 608                 if ( $this->mParams['watch'] ) {
 609                         $watch = true;
 610                 }
 611
 612                 // No errors, no warnings: do the upload
 613                 if ( $this->mParams['async'] ) {
 614                         $progress = UploadBase::getSessionStatus( $this->mParams['filekey'] );
 615                         if ( $progress && $progress['result'] === 'Poll' ) {
 616                                 $this->dieUsage( "Upload from stash already in progress.", 'publishfailed' );
 617                         }
 618                         UploadBase::setSessionStatus(
 619                                 $this->mParams['filekey'],
 620                                 array( 'result' => 'Poll', 'stage' => 'queued', 'status' => Status::newGood() )
 621                         );
 622                         JobQueueGroup::singleton()->push( new PublishStashedFileJob(
 623                                 Title::makeTitle( NS_FILE, $this->mParams['filename'] ),
 624                                 array(
 625                                         'filename' => $this->mParams['filename'],
 626                                         'filekey' => $this->mParams['filekey'],
 627                                         'comment' => $this->mParams['comment'],
 628                                         'text' => $this->mParams['text'],
 629                                         'watch' => $watch,
 630                                         'session' => $this->getContext()->exportSession()
 631                                 )
 632                         ) );
 633                         $result['result'] = 'Poll';
 634                 } else {
 635                         /** @var $status Status */
 636                         $status = $this->mUpload->performUpload( $this->mParams['comment'],
 637                                 $this->mParams['text'], $watch, $this->getUser() );
 638
 639                         if ( !$status->isGood() ) {
 640                                 $error = $status->getErrorsArray();
 641
 642                                 if ( count( $error ) == 1 && $error[0][0] == 'async' ) {
 643                                         // The upload can not be performed right now, because the user
 644                                         // requested so
 645                                         return array(
 646                                                 'result' => 'Queued',
 647                                                 'statuskey' => $error[0][1],
 648                                         );
 649                                 }
 650
 651                                 $this->getResult()->setIndexedTagName( $error, 'error' );
 652                                 $this->dieUsage( 'An internal error occurred', 'internal-error', 0, $error );
 653                         }
 654                         $result['result'] = 'Success';
 655                 }
 656
 657                 $result['filename'] = $file->getName();
 658                 if ( $warnings && count( $warnings ) > 0 ) {
 659                         $result['warnings'] = $warnings;
 660                 }
 661
 662                 return $result;
 663         }
 664
 665         /**
 666          * Checks if asynchronous copy uploads are enabled and throws an error if they are not.
 667          */
 668         protected function checkAsyncDownloadEnabled() {
 669                 global $wgAllowAsyncCopyUploads;
 670                 if ( !$wgAllowAsyncCopyUploads ) {
 671                         $this->dieUsage( 'Asynchronous copy uploads disabled', 'asynccopyuploaddisabled' );
 672                 }
 673         }
 674
 675         public function mustBePosted() {
 676                 return true;
 677         }
 678
 679         public function isWriteMode() {
 680                 return true;
 681         }
 682
 683         public function getAllowedParams() {
 684                 $params = array(
 685                         'filename' => array(
 686                                 ApiBase::PARAM_TYPE => 'string',
 687                         ),
 688                         'comment' => array(
 689                                 ApiBase::PARAM_DFLT => ''
 690                         ),
 691                         'text' => null,
 692                         'token' => array(
 693                                 ApiBase::PARAM_TYPE => 'string',
 694                                 ApiBase::PARAM_REQUIRED => true
 695                         ),
 696                         'watch' => array(
 697                                 ApiBase::PARAM_DFLT => false,
 698                                 ApiBase::PARAM_DEPRECATED => true,
 699                         ),
 700                         'watchlist' => array(
 701                                 ApiBase::PARAM_DFLT => 'preferences',
 702                                 ApiBase::PARAM_TYPE => array(
 703                                         'watch',
 704                                         'preferences',
 705                                         'nochange'
 706                                 ),
 707                         ),
 708                         'ignorewarnings' => false,
 709                         'file' => array(
 710                                 ApiBase::PARAM_TYPE => 'upload',
 711                         ),
 712                         'url' => null,
 713                         'filekey' => null,
 714                         'sessionkey' => array(
 715                                 ApiBase::PARAM_DFLT => null,
 716                                 ApiBase::PARAM_DEPRECATED => true,
 717                         ),
 718                         'stash' => false,
 719
 720                         'filesize' => null,
 721                         'offset' => null,
 722                         'chunk' => array(
 723                                 ApiBase::PARAM_TYPE => 'upload',
 724                         ),
 725
 726                         'async' => false,
 727                         'asyncdownload' => false,
 728                         'leavemessage' => false,
 729                         'statuskey' => null,
 730                         'checkstatus' => false,
 731                 );
 732
 733                 return $params;
 734         }
 735
 736         public function getParamDescription() {
 737                 $params = array(
 738                         'filename' => 'Target filename',
 739                         'token' => 'Edit token. You can get one of these through prop=info',
 740                         'comment' => 'Upload comment. Also used as the initial page text for new ' .
 741                                 'files if "text" is not specified',
 742                         'text' => 'Initial page text for new files',
 743                         'watch' => 'Watch the page',
 744                         'watchlist' => 'Unconditionally add or remove the page from your watchlist, ' .
 745                                 'use preferences or do not change watch',
 746                         'ignorewarnings' => 'Ignore any warnings',
 747                         'file' => 'File contents',
 748                         'url' => 'URL to fetch the file from',
 749                         'filekey' => 'Key that identifies a previous upload that was stashed temporarily.',
 750                         'sessionkey' => 'Same as filekey, maintained for backward compatibility.',
 751                         'stash' => 'If set, the server will not add the file to the repository ' .
 752                                 'and stash it temporarily.',
 753
 754                         'chunk' => 'Chunk contents',
 755                         'offset' => 'Offset of chunk in bytes',
 756                         'filesize' => 'Filesize of entire upload',
 757
 758                         'async' => 'Make potentially large file operations asynchronous when possible',
 759                         'asyncdownload' => 'Make fetching a URL asynchronous',
 760                         'leavemessage' => 'If asyncdownload is used, leave a message on the user talk page if finished',
 761                         'statuskey' => 'Fetch the upload status for this file key (upload by URL)',
 762                         'checkstatus' => 'Only fetch the upload status for the given file key',
 763                 );
 764
 765                 return $params;
 766         }
 767
 768         public function getResultProperties() {
 769                 return array(
 770                         '' => array(
 771                                 'result' => array(
 772                                         ApiBase::PROP_TYPE => array(
 773                                                 'Success',
 774                                                 'Warning',
 775                                                 'Continue',
 776                                                 'Queued'
 777                                         ),
 778                                 ),
 779                                 'filekey' => array(
 780                                         ApiBase::PROP_TYPE => 'string',
 781                                         ApiBase::PROP_NULLABLE => true
 782                                 ),
 783                                 'sessionkey' => array(
 784                                         ApiBase::PROP_TYPE => 'string',
 785                                         ApiBase::PROP_NULLABLE => true
 786                                 ),
 787                                 'offset' => array(
 788                                         ApiBase::PROP_TYPE => 'integer',
 789                                         ApiBase::PROP_NULLABLE => true
 790                                 ),
 791                                 'statuskey' => array(
 792                                         ApiBase::PROP_TYPE => 'string',
 793                                         ApiBase::PROP_NULLABLE => true
 794                                 ),
 795                                 'filename' => array(
 796                                         ApiBase::PROP_TYPE => 'string',
 797                                         ApiBase::PROP_NULLABLE => true
 798                                 )
 799                         )
 800                 );
 801         }
 802
 803         public function getDescription() {
 804                 return array(
 805                         'Upload a file, or get the status of pending uploads. Several methods are available:',
 806                         ' * Upload file contents directly, using the "file" parameter',
 807                         ' * Have the MediaWiki server fetch a file from a URL, using the "url" parameter',
 808                         ' * Complete an earlier upload that failed due to warnings, using the "filekey" parameter',
 809                         'Note that the HTTP POST must be done as a file upload (i.e. using multipart/form-data) when',
 810                         'sending the "file". Also you must get and send an edit token before doing any upload stuff.'
 811                 );
 812         }
 813
 814         public function getPossibleErrors() {
 815                 return array_merge( parent::getPossibleErrors(),
 816                         $this->getRequireOnlyOneParameterErrorMessages( array( 'filekey', 'file', 'url', 'statuskey' ) ),
 817                         array(
 818                                 array( 'uploaddisabled' ),
 819                                 array( 'invalid-file-key' ),
 820                                 array( 'uploaddisabled' ),
 821                                 array( 'mustbeloggedin', 'upload' ),
 822                                 array( 'badaccess-groups' ),
 823                                 array( 'code' => 'fetchfileerror', 'info' => '' ),
 824                                 array( 'code' => 'nomodule', 'info' => 'No upload module set' ),
 825                                 array( 'code' => 'empty-file', 'info' => 'The file you submitted was empty' ),
 826                                 array( 'code' => 'filetype-missing', 'info' => 'The file is missing an extension' ),
 827                                 array( 'code' => 'filename-tooshort', 'info' => 'The filename is too short' ),
 828                                 array( 'code' => 'overwrite', 'info' => 'Overwriting an existing file is not allowed' ),
 829                                 array( 'code' => 'stashfailed', 'info' => 'Stashing temporary file failed' ),
 830                                 array( 'code' => 'publishfailed', 'info' => 'Publishing of stashed file failed' ),
 831                                 array( 'code' => 'internal-error', 'info' => 'An internal error occurred' ),
 832                                 array( 'code' => 'asynccopyuploaddisabled', 'info' => 'Asynchronous copy uploads disabled' ),
 833                                 array( 'code' => 'stasherror', 'info' => 'An upload stash error occurred' ),
 834                                 array( 'fileexists-forbidden' ),
 835                                 array( 'fileexists-shared-forbidden' ),
 836                         )
 837                 );
 838         }
 839
 840         public function needsToken() {
 841                 return true;
 842         }
 843
 844         public function getTokenSalt() {
 845                 return '';
 846         }
 847
 848         public function getExamples() {
 849                 return array(
 850                         'api.php?action=upload&filename=Wiki.png' .
 851                         '&url=http%3A//upload.wikimedia.org/wikipedia/en/b/bc/Wiki.png'
 852                                 => 'Upload from a URL',
 853                         'api.php?action=upload&filename=Wiki.png&filekey=filekey&ignorewarnings=1'
 854                                 => 'Complete an upload that failed due to warnings',
 855                 );
 856         }
 857
 858         public function getHelpUrls() {
 859                 return 'https://www.mediawiki.org/wiki/API:Upload';
 860         }
 861 }