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                 // Check whether upload is enabled
  38                 if ( !UploadBase::isEnabled() ) {
  39                         $this->dieUsageMsg( 'uploaddisabled' );
  40                 }
  41
  42                 $user = $this->getUser();
  43
  44                 // Parameter handling
  45                 $this->mParams = $this->extractRequestParams();
  46                 $request = $this->getMain()->getRequest();
  47                 // Check if async mode is actually supported (jobs done in cli mode)
  48                 $this->mParams['async'] = ( $this->mParams['async'] && $this->getConfig()->get( 'EnableAsyncUploads' ) );
  49                 // Add the uploaded file to the params array
  50                 $this->mParams['file'] = $request->getFileName( 'file' );
  51                 $this->mParams['chunk'] = $request->getFileName( 'chunk' );
  52
  53                 // Copy the session key to the file key, for backward compatibility.
  54                 if ( !$this->mParams['filekey'] && $this->mParams['sessionkey'] ) {
  55                         $this->mParams['filekey'] = $this->mParams['sessionkey'];
  56                 }
  57
  58                 // Select an upload module
  59                 try {
  60                         if ( !$this->selectUploadModule() ) {
  61                                 return; // not a true upload, but a status request or similar
  62                         } elseif ( !isset( $this->mUpload ) ) {
  63                                 $this->dieUsage( 'No upload module set', 'nomodule' );
  64                         }
  65                 } catch ( UploadStashException $e ) { // XXX: don't spam exception log
  66                         $this->dieUsage( get_class( $e ) . ": " . $e->getMessage(), 'stasherror' );
  67                 }
  68
  69                 // First check permission to upload
  70                 $this->checkPermissions( $user );
  71
  72                 // Fetch the file (usually a no-op)
  73                 /** @var $status Status */
  74                 $status = $this->mUpload->fetchFile();
  75                 if ( !$status->isGood() ) {
  76                         $errors = $status->getErrorsArray();
  77                         $error = array_shift( $errors[0] );
  78                         $this->dieUsage( 'Error fetching file from remote source', $error, 0, $errors[0] );
  79                 }
  80
  81                 // Check if the uploaded file is sane
  82                 if ( $this->mParams['chunk'] ) {
  83                         $maxSize = $this->mUpload->getMaxUploadSize();
  84                         if ( $this->mParams['filesize'] > $maxSize ) {
  85                                 $this->dieUsage( 'The file you submitted was too large', 'file-too-large' );
  86                         }
  87                         if ( !$this->mUpload->getTitle() ) {
  88                                 $this->dieUsage( 'Invalid file title supplied', 'internal-error' );
  89                         }
  90                 } elseif ( $this->mParams['async'] && $this->mParams['filekey'] ) {
  91                         // defer verification to background process
  92                 } else {
  93                         wfDebug( __METHOD__ . " about to verify\n" );
  94                         $this->verifyUpload();
  95                 }
  96
  97                 // Check if the user has the rights to modify or overwrite the requested title
  98                 // (This check is irrelevant if stashing is already requested, since the errors
  99                 //  can always be fixed by changing the title)
 100                 if ( !$this->mParams['stash'] ) {
 101                         $permErrors = $this->mUpload->verifyTitlePermissions( $user );
 102                         if ( $permErrors !== true ) {
 103                                 $this->dieRecoverableError( $permErrors[0], 'filename' );
 104                         }
 105                 }
 106
 107                 // Get the result based on the current upload context:
 108                 try {
 109                         $result = $this->getContextResult();
 110                         if ( $result['result'] === 'Success' ) {
 111                                 $result['imageinfo'] = $this->mUpload->getImageInfo( $this->getResult() );
 112                         }
 113                 } catch ( UploadStashException $e ) { // XXX: don't spam exception log
 114                         $this->dieUsage( get_class( $e ) . ": " . $e->getMessage(), 'stasherror' );
 115                 }
 116
 117                 $this->getResult()->addValue( null, $this->getModuleName(), $result );
 118
 119                 // Cleanup any temporary mess
 120                 $this->mUpload->cleanupTempFile();
 121         }
 122
 123         /**
 124          * Get an upload result based on upload context
 125          * @return array
 126          */
 127         private function getContextResult() {
 128                 $warnings = $this->getApiWarnings();
 129                 if ( $warnings && !$this->mParams['ignorewarnings'] ) {
 130                         // Get warnings formatted in result array format
 131                         return $this->getWarningsResult( $warnings );
 132                 } elseif ( $this->mParams['chunk'] ) {
 133                         // Add chunk, and get result
 134                         return $this->getChunkResult( $warnings );
 135                 } elseif ( $this->mParams['stash'] ) {
 136                         // Stash the file and get stash result
 137                         return $this->getStashResult( $warnings );
 138                 }
 139
 140                 // This is the most common case -- a normal upload with no warnings
 141                 // performUpload will return a formatted properly for the API with status
 142                 return $this->performUpload( $warnings );
 143         }
 144
 145         /**
 146          * Get Stash Result, throws an exception if the file could not be stashed.
 147          * @param array $warnings Array of Api upload warnings
 148          * @return array
 149          */
 150         private function getStashResult( $warnings ) {
 151                 $result = array();
 152                 // Some uploads can request they be stashed, so as not to publish them immediately.
 153                 // In this case, a failure to stash ought to be fatal
 154                 try {
 155                         $result['result'] = 'Success';
 156                         $result['filekey'] = $this->performStash();
 157                         $result['sessionkey'] = $result['filekey']; // backwards compatibility
 158                         if ( $warnings && count( $warnings ) > 0 ) {
 159                                 $result['warnings'] = $warnings;
 160                         }
 161                 } catch ( MWException $e ) {
 162                         $this->dieUsage( $e->getMessage(), 'stashfailed' );
 163                 }
 164
 165                 return $result;
 166         }
 167
 168         /**
 169          * Get Warnings Result
 170          * @param array $warnings Array of Api upload warnings
 171          * @return array
 172          */
 173         private function getWarningsResult( $warnings ) {
 174                 $result = array();
 175                 $result['result'] = 'Warning';
 176                 $result['warnings'] = $warnings;
 177                 // in case the warnings can be fixed with some further user action, let's stash this upload
 178                 // and return a key they can use to restart it
 179                 try {
 180                         $result['filekey'] = $this->performStash();
 181                         $result['sessionkey'] = $result['filekey']; // backwards compatibility
 182                 } catch ( MWException $e ) {
 183                         $result['warnings']['stashfailed'] = $e->getMessage();
 184                 }
 185
 186                 return $result;
 187         }
 188
 189         /**
 190          * Get the result of a chunk upload.
 191          * @param array $warnings Array of Api upload warnings
 192          * @return array
 193          */
 194         private function getChunkResult( $warnings ) {
 195                 $result = array();
 196
 197                 $result['result'] = 'Continue';
 198                 if ( $warnings && count( $warnings ) > 0 ) {
 199                         $result['warnings'] = $warnings;
 200                 }
 201                 $request = $this->getMain()->getRequest();
 202                 $chunkPath = $request->getFileTempname( 'chunk' );
 203                 $chunkSize = $request->getUpload( 'chunk' )->getSize();
 204                 if ( $this->mParams['offset'] == 0 ) {
 205                         try {
 206                                 $filekey = $this->performStash();
 207                         } catch ( MWException $e ) {
 208                                 // FIXME: Error handling here is wrong/different from rest of this
 209                                 $this->dieUsage( $e->getMessage(), 'stashfailed' );
 210                         }
 211                 } else {
 212                         $filekey = $this->mParams['filekey'];
 213                         /** @var $status Status */
 214                         $status = $this->mUpload->addChunk(
 215                                 $chunkPath, $chunkSize, $this->mParams['offset'] );
 216                         if ( !$status->isGood() ) {
 217                                 $this->dieUsage( $status->getWikiText(), 'stashfailed' );
 218
 219                                 return array();
 220                         }
 221                 }
 222
 223                 // Check we added the last chunk:
 224                 if ( $this->mParams['offset'] + $chunkSize == $this->mParams['filesize'] ) {
 225                         if ( $this->mParams['async'] ) {
 226                                 $progress = UploadBase::getSessionStatus( $filekey );
 227                                 if ( $progress && $progress['result'] === 'Poll' ) {
 228                                         $this->dieUsage( "Chunk assembly already in progress.", 'stashfailed' );
 229                                 }
 230                                 UploadBase::setSessionStatus(
 231                                         $filekey,
 232                                         array( 'result' => 'Poll',
 233                                                 'stage' => 'queued', 'status' => Status::newGood() )
 234                                 );
 235                                 JobQueueGroup::singleton()->push( new AssembleUploadChunksJob(
 236                                         Title::makeTitle( NS_FILE, $filekey ),
 237                                         array(
 238                                                 'filename' => $this->mParams['filename'],
 239                                                 'filekey' => $filekey,
 240                                                 'session' => $this->getContext()->exportSession()
 241                                         )
 242                                 ) );
 243                                 $result['result'] = 'Poll';
 244                         } else {
 245                                 $status = $this->mUpload->concatenateChunks();
 246                                 if ( !$status->isGood() ) {
 247                                         $this->dieUsage( $status->getWikiText(), 'stashfailed' );
 248
 249                                         return array();
 250                                 }
 251
 252                                 // The fully concatenated file has a new filekey. So remove
 253                                 // the old filekey and fetch the new one.
 254                                 $this->mUpload->stash->removeFile( $filekey );
 255                                 $filekey = $this->mUpload->getLocalFile()->getFileKey();
 256
 257                                 $result['result'] = 'Success';
 258                         }
 259                 }
 260                 $result['filekey'] = $filekey;
 261                 $result['offset'] = $this->mParams['offset'] + $chunkSize;
 262
 263                 return $result;
 264         }
 265
 266         /**
 267          * Stash the file and return the file key
 268          * Also re-raises exceptions with slightly more informative message strings (useful for API)
 269          * @throws MWException
 270          * @return string File key
 271          */
 272         private function performStash() {
 273                 try {
 274                         $stashFile = $this->mUpload->stashFile();
 275
 276                         if ( !$stashFile ) {
 277                                 throw new MWException( 'Invalid stashed file' );
 278                         }
 279                         $fileKey = $stashFile->getFileKey();
 280                 } catch ( MWException $e ) {
 281                         $message = 'Stashing temporary file failed: ' . get_class( $e ) . ' ' . $e->getMessage();
 282                         wfDebug( __METHOD__ . ' ' . $message . "\n" );
 283                         throw new MWException( $message );
 284                 }
 285
 286                 return $fileKey;
 287         }
 288
 289         /**
 290          * Throw an error that the user can recover from by providing a better
 291          * value for $parameter
 292          *
 293          * @param array $error Error array suitable for passing to dieUsageMsg()
 294          * @param string $parameter Parameter that needs revising
 295          * @param array $data Optional extra data to pass to the user
 296          * @throws UsageException
 297          */
 298         private function dieRecoverableError( $error, $parameter, $data = array() ) {
 299                 try {
 300                         $data['filekey'] = $this->performStash();
 301                         $data['sessionkey'] = $data['filekey'];
 302                 } catch ( MWException $e ) {
 303                         $data['stashfailed'] = $e->getMessage();
 304                 }
 305                 $data['invalidparameter'] = $parameter;
 306
 307                 $parsed = $this->parseMsg( $error );
 308                 $this->dieUsage( $parsed['info'], $parsed['code'], 0, $data );
 309         }
 310
 311         /**
 312          * Select an upload module and set it to mUpload. Dies on failure. If the
 313          * request was a status request and not a true upload, returns false;
 314          * otherwise true
 315          *
 316          * @return bool
 317          */
 318         protected function selectUploadModule() {
 319                 $request = $this->getMain()->getRequest();
 320
 321                 // chunk or one and only one of the following parameters is needed
 322                 if ( !$this->mParams['chunk'] ) {
 323                         $this->requireOnlyOneParameter( $this->mParams,
 324                                 'filekey', 'file', 'url', 'statuskey' );
 325                 }
 326
 327                 // Status report for "upload to stash"/"upload from stash"
 328                 if ( $this->mParams['filekey'] && $this->mParams['checkstatus'] ) {
 329                         $progress = UploadBase::getSessionStatus( $this->mParams['filekey'] );
 330                         if ( !$progress ) {
 331                                 $this->dieUsage( 'No result in status data', 'missingresult' );
 332                         } elseif ( !$progress['status']->isGood() ) {
 333                                 $this->dieUsage( $progress['status']->getWikiText(), 'stashfailed' );
 334                         }
 335                         if ( isset( $progress['status']->value['verification'] ) ) {
 336                                 $this->checkVerification( $progress['status']->value['verification'] );
 337                         }
 338                         unset( $progress['status'] ); // remove Status object
 339                         $this->getResult()->addValue( null, $this->getModuleName(), $progress );
 340
 341                         return false;
 342                 }
 343
 344                 if ( $this->mParams['statuskey'] ) {
 345                         $this->checkAsyncDownloadEnabled();
 346
 347                         // Status request for an async upload
 348                         $sessionData = UploadFromUrlJob::getSessionData( $this->mParams['statuskey'] );
 349                         if ( !isset( $sessionData['result'] ) ) {
 350                                 $this->dieUsage( 'No result in session data', 'missingresult' );
 351                         }
 352                         if ( $sessionData['result'] == 'Warning' ) {
 353                                 $sessionData['warnings'] = $this->transformWarnings( $sessionData['warnings'] );
 354                                 $sessionData['sessionkey'] = $this->mParams['statuskey'];
 355                         }
 356                         $this->getResult()->addValue( null, $this->getModuleName(), $sessionData );
 357
 358                         return false;
 359                 }
 360
 361                 // The following modules all require the filename parameter to be set
 362                 if ( is_null( $this->mParams['filename'] ) ) {
 363                         $this->dieUsageMsg( array( 'missingparam', 'filename' ) );
 364                 }
 365
 366                 if ( $this->mParams['chunk'] ) {
 367                         // Chunk upload
 368                         $this->mUpload = new UploadFromChunks();
 369                         if ( isset( $this->mParams['filekey'] ) ) {
 370                                 // handle new chunk
 371                                 $this->mUpload->continueChunks(
 372                                         $this->mParams['filename'],
 373                                         $this->mParams['filekey'],
 374                                         $request->getUpload( 'chunk' )
 375                                 );
 376                         } else {
 377                                 // handle first chunk
 378                                 $this->mUpload->initialize(
 379                                         $this->mParams['filename'],
 380                                         $request->getUpload( 'chunk' )
 381                                 );
 382                         }
 383                 } elseif ( isset( $this->mParams['filekey'] ) ) {
 384                         // Upload stashed in a previous request
 385                         if ( !UploadFromStash::isValidKey( $this->mParams['filekey'] ) ) {
 386                                 $this->dieUsageMsg( 'invalid-file-key' );
 387                         }
 388
 389                         $this->mUpload = new UploadFromStash( $this->getUser() );
 390                         // This will not download the temp file in initialize() in async mode.
 391                         // We still have enough information to call checkWarnings() and such.
 392                         $this->mUpload->initialize(
 393                                 $this->mParams['filekey'], $this->mParams['filename'], !$this->mParams['async']
 394                         );
 395                 } elseif ( isset( $this->mParams['file'] ) ) {
 396                         $this->mUpload = new UploadFromFile();
 397                         $this->mUpload->initialize(
 398                                 $this->mParams['filename'],
 399                                 $request->getUpload( 'file' )
 400                         );
 401                 } elseif ( isset( $this->mParams['url'] ) ) {
 402                         // Make sure upload by URL is enabled:
 403                         if ( !UploadFromUrl::isEnabled() ) {
 404                                 $this->dieUsageMsg( 'copyuploaddisabled' );
 405                         }
 406
 407                         if ( !UploadFromUrl::isAllowedHost( $this->mParams['url'] ) ) {
 408                                 $this->dieUsageMsg( 'copyuploadbaddomain' );
 409                         }
 410
 411                         if ( !UploadFromUrl::isAllowedUrl( $this->mParams['url'] ) ) {
 412                                 $this->dieUsageMsg( 'copyuploadbadurl' );
 413                         }
 414
 415                         $async = false;
 416                         if ( $this->mParams['asyncdownload'] ) {
 417                                 $this->checkAsyncDownloadEnabled();
 418
 419                                 if ( $this->mParams['leavemessage'] && !$this->mParams['ignorewarnings'] ) {
 420                                         $this->dieUsage( 'Using leavemessage without ignorewarnings is not supported',
 421                                                 'missing-ignorewarnings' );
 422                                 }
 423
 424                                 if ( $this->mParams['leavemessage'] ) {
 425                                         $async = 'async-leavemessage';
 426                                 } else {
 427                                         $async = 'async';
 428                                 }
 429                         }
 430                         $this->mUpload = new UploadFromUrl;
 431                         $this->mUpload->initialize( $this->mParams['filename'],
 432                                 $this->mParams['url'], $async );
 433                 }
 434
 435                 return true;
 436         }
 437
 438         /**
 439          * Checks that the user has permissions to perform this upload.
 440          * Dies with usage message on inadequate permissions.
 441          * @param User $user The user to check.
 442          */
 443         protected function checkPermissions( $user ) {
 444                 // Check whether the user has the appropriate permissions to upload anyway
 445                 $permission = $this->mUpload->isAllowed( $user );
 446
 447                 if ( $permission !== true ) {
 448                         if ( !$user->isLoggedIn() ) {
 449                                 $this->dieUsageMsg( array( 'mustbeloggedin', 'upload' ) );
 450                         }
 451
 452                         $this->dieUsageMsg( 'badaccess-groups' );
 453                 }
 454         }
 455
 456         /**
 457          * Performs file verification, dies on error.
 458          */
 459         protected function verifyUpload() {
 460                 $verification = $this->mUpload->verifyUpload();
 461                 if ( $verification['status'] === UploadBase::OK ) {
 462                         return;
 463                 }
 464
 465                 $this->checkVerification( $verification );
 466         }
 467
 468         /**
 469          * Performs file verification, dies on error.
 470          */
 471         protected function checkVerification( array $verification ) {
 472                 // @todo Move them to ApiBase's message map
 473                 switch ( $verification['status'] ) {
 474                         // Recoverable errors
 475                         case UploadBase::MIN_LENGTH_PARTNAME:
 476                                 $this->dieRecoverableError( 'filename-tooshort', 'filename' );
 477                                 break;
 478                         case UploadBase::ILLEGAL_FILENAME:
 479                                 $this->dieRecoverableError( 'illegal-filename', 'filename',
 480                                         array( 'filename' => $verification['filtered'] ) );
 481                                 break;
 482                         case UploadBase::FILENAME_TOO_LONG:
 483                                 $this->dieRecoverableError( 'filename-toolong', 'filename' );
 484                                 break;
 485                         case UploadBase::FILETYPE_MISSING:
 486                                 $this->dieRecoverableError( 'filetype-missing', 'filename' );
 487                                 break;
 488                         case UploadBase::WINDOWS_NONASCII_FILENAME:
 489                                 $this->dieRecoverableError( 'windows-nonascii-filename', 'filename' );
 490                                 break;
 491
 492                         // Unrecoverable errors
 493                         case UploadBase::EMPTY_FILE:
 494                                 $this->dieUsage( 'The file you submitted was empty', 'empty-file' );
 495                                 break;
 496                         case UploadBase::FILE_TOO_LARGE:
 497                                 $this->dieUsage( 'The file you submitted was too large', 'file-too-large' );
 498                                 break;
 499
 500                         case UploadBase::FILETYPE_BADTYPE:
 501                                 $extradata = array(
 502                                         'filetype' => $verification['finalExt'],
 503                                         'allowed' => array_values( array_unique( $this->getConfig()->get( 'FileExtensions' ) ) )
 504                                 );
 505                                 $this->getResult()->setIndexedTagName( $extradata['allowed'], 'ext' );
 506
 507                                 $msg = "Filetype not permitted: ";
 508                                 if ( isset( $verification['blacklistedExt'] ) ) {
 509                                         $msg .= join( ', ', $verification['blacklistedExt'] );
 510                                         $extradata['blacklisted'] = array_values( $verification['blacklistedExt'] );
 511                                         $this->getResult()->setIndexedTagName( $extradata['blacklisted'], 'ext' );
 512                                 } else {
 513                                         $msg .= $verification['finalExt'];
 514                                 }
 515                                 $this->dieUsage( $msg, 'filetype-banned', 0, $extradata );
 516                                 break;
 517                         case UploadBase::VERIFICATION_ERROR:
 518                                 $this->getResult()->setIndexedTagName( $verification['details'], 'detail' );
 519                                 $this->dieUsage( 'This file did not pass file verification', 'verification-error',
 520                                         0, array( 'details' => $verification['details'] ) );
 521                                 break;
 522                         case UploadBase::HOOK_ABORTED:
 523                                 $this->dieUsage( "The modification you tried to make was aborted by an extension hook",
 524                                         'hookaborted', 0, array( 'error' => $verification['error'] ) );
 525                                 break;
 526                         default:
 527                                 $this->dieUsage( 'An unknown error occurred', 'unknown-error',
 528                                         0, array( 'code' => $verification['status'] ) );
 529                                 break;
 530                 }
 531         }
 532
 533         /**
 534          * Check warnings.
 535          * Returns a suitable array for inclusion into API results if there were warnings
 536          * Returns the empty array if there were no warnings
 537          *
 538          * @return array
 539          */
 540         protected function getApiWarnings() {
 541                 $warnings = $this->mUpload->checkWarnings();
 542
 543                 return $this->transformWarnings( $warnings );
 544         }
 545
 546         protected function transformWarnings( $warnings ) {
 547                 if ( $warnings ) {
 548                         // Add indices
 549                         $result = $this->getResult();
 550                         $result->setIndexedTagName( $warnings, 'warning' );
 551
 552                         if ( isset( $warnings['duplicate'] ) ) {
 553                                 $dupes = array();
 554                                 foreach ( $warnings['duplicate'] as $dupe ) {
 555                                         $dupes[] = $dupe->getName();
 556                                 }
 557                                 $result->setIndexedTagName( $dupes, 'duplicate' );
 558                                 $warnings['duplicate'] = $dupes;
 559                         }
 560
 561                         if ( isset( $warnings['exists'] ) ) {
 562                                 $warning = $warnings['exists'];
 563                                 unset( $warnings['exists'] );
 564                                 $localFile = isset( $warning['normalizedFile'] )
 565                                         ? $warning['normalizedFile']
 566                                         : $warning['file'];
 567                                 $warnings[$warning['warning']] = $localFile->getName();
 568                         }
 569                 }
 570
 571                 return $warnings;
 572         }
 573
 574         /**
 575          * Perform the actual upload. Returns a suitable result array on success;
 576          * dies on failure.
 577          *
 578          * @param array $warnings Array of Api upload warnings
 579          * @return array
 580          */
 581         protected function performUpload( $warnings ) {
 582                 // Use comment as initial page text by default
 583                 if ( is_null( $this->mParams['text'] ) ) {
 584                         $this->mParams['text'] = $this->mParams['comment'];
 585                 }
 586
 587                 /** @var $file File */
 588                 $file = $this->mUpload->getLocalFile();
 589
 590                 // For preferences mode, we want to watch if 'watchdefault' is set or
 591                 // if the *file* doesn't exist and 'watchcreations' is set. But
 592                 // getWatchlistValue()'s automatic handling checks if the *title*
 593                 // exists or not, so we need to check both prefs manually.
 594                 $watch = $this->getWatchlistValue(
 595                         $this->mParams['watchlist'], $file->getTitle(), 'watchdefault'
 596                 );
 597                 if ( !$watch && $this->mParams['watchlist'] == 'preferences' && !$file->exists() ) {
 598                         $watch = $this->getWatchlistValue(
 599                                 $this->mParams['watchlist'], $file->getTitle(), 'watchcreations'
 600                         );
 601                 }
 602
 603                 // Deprecated parameters
 604                 if ( $this->mParams['watch'] ) {
 605                         $watch = true;
 606                 }
 607
 608                 // No errors, no warnings: do the upload
 609                 if ( $this->mParams['async'] ) {
 610                         $progress = UploadBase::getSessionStatus( $this->mParams['filekey'] );
 611                         if ( $progress && $progress['result'] === 'Poll' ) {
 612                                 $this->dieUsage( "Upload from stash already in progress.", 'publishfailed' );
 613                         }
 614                         UploadBase::setSessionStatus(
 615                                 $this->mParams['filekey'],
 616                                 array( 'result' => 'Poll', 'stage' => 'queued', 'status' => Status::newGood() )
 617                         );
 618                         JobQueueGroup::singleton()->push( new PublishStashedFileJob(
 619                                 Title::makeTitle( NS_FILE, $this->mParams['filename'] ),
 620                                 array(
 621                                         'filename' => $this->mParams['filename'],
 622                                         'filekey' => $this->mParams['filekey'],
 623                                         'comment' => $this->mParams['comment'],
 624                                         'text' => $this->mParams['text'],
 625                                         'watch' => $watch,
 626                                         'session' => $this->getContext()->exportSession()
 627                                 )
 628                         ) );
 629                         $result['result'] = 'Poll';
 630                 } else {
 631                         /** @var $status Status */
 632                         $status = $this->mUpload->performUpload( $this->mParams['comment'],
 633                                 $this->mParams['text'], $watch, $this->getUser() );
 634
 635                         if ( !$status->isGood() ) {
 636                                 $error = $status->getErrorsArray();
 637
 638                                 if ( count( $error ) == 1 && $error[0][0] == 'async' ) {
 639                                         // The upload can not be performed right now, because the user
 640                                         // requested so
 641                                         return array(
 642                                                 'result' => 'Queued',
 643                                                 'statuskey' => $error[0][1],
 644                                         );
 645                                 }
 646
 647                                 $this->getResult()->setIndexedTagName( $error, 'error' );
 648                                 $this->dieUsage( 'An internal error occurred', 'internal-error', 0, $error );
 649                         }
 650                         $result['result'] = 'Success';
 651                 }
 652
 653                 $result['filename'] = $file->getName();
 654                 if ( $warnings && count( $warnings ) > 0 ) {
 655                         $result['warnings'] = $warnings;
 656                 }
 657
 658                 return $result;
 659         }
 660
 661         /**
 662          * Checks if asynchronous copy uploads are enabled and throws an error if they are not.
 663          */
 664         protected function checkAsyncDownloadEnabled() {
 665                 if ( !$this->getConfig()->get( 'AllowAsyncCopyUploads' ) ) {
 666                         $this->dieUsage( 'Asynchronous copy uploads disabled', 'asynccopyuploaddisabled' );
 667                 }
 668         }
 669
 670         public function mustBePosted() {
 671                 return true;
 672         }
 673
 674         public function isWriteMode() {
 675                 return true;
 676         }
 677
 678         public function getAllowedParams() {
 679                 $params = array(
 680                         'filename' => array(
 681                                 ApiBase::PARAM_TYPE => 'string',
 682                         ),
 683                         'comment' => array(
 684                                 ApiBase::PARAM_DFLT => ''
 685                         ),
 686                         'text' => null,
 687                         'token' => array(
 688                                 ApiBase::PARAM_TYPE => 'string',
 689                                 ApiBase::PARAM_REQUIRED => true
 690                         ),
 691                         'watch' => array(
 692                                 ApiBase::PARAM_DFLT => false,
 693                                 ApiBase::PARAM_DEPRECATED => true,
 694                         ),
 695                         'watchlist' => array(
 696                                 ApiBase::PARAM_DFLT => 'preferences',
 697                                 ApiBase::PARAM_TYPE => array(
 698                                         'watch',
 699                                         'preferences',
 700                                         'nochange'
 701                                 ),
 702                         ),
 703                         'ignorewarnings' => false,
 704                         'file' => array(
 705                                 ApiBase::PARAM_TYPE => 'upload',
 706                         ),
 707                         'url' => null,
 708                         'filekey' => null,
 709                         'sessionkey' => array(
 710                                 ApiBase::PARAM_DFLT => null,
 711                                 ApiBase::PARAM_DEPRECATED => true,
 712                         ),
 713                         'stash' => false,
 714
 715                         'filesize' => null,
 716                         'offset' => null,
 717                         'chunk' => array(
 718                                 ApiBase::PARAM_TYPE => 'upload',
 719                         ),
 720
 721                         'async' => false,
 722                         'asyncdownload' => false,
 723                         'leavemessage' => false,
 724                         'statuskey' => null,
 725                         'checkstatus' => false,
 726                 );
 727
 728                 return $params;
 729         }
 730
 731         public function getParamDescription() {
 732                 $params = array(
 733                         'filename' => 'Target filename',
 734                         'token' => 'Edit token. You can get one of these through prop=info',
 735                         'comment' => 'Upload comment. Also used as the initial page text for new ' .
 736                                 'files if "text" is not specified',
 737                         'text' => 'Initial page text for new files',
 738                         'watch' => 'Watch the page',
 739                         'watchlist' => 'Unconditionally add or remove the page from your watchlist, ' .
 740                                 'use preferences or do not change watch',
 741                         'ignorewarnings' => 'Ignore any warnings',
 742                         'file' => 'File contents',
 743                         'url' => 'URL to fetch the file from',
 744                         'filekey' => 'Key that identifies a previous upload that was stashed temporarily.',
 745                         'sessionkey' => 'Same as filekey, maintained for backward compatibility.',
 746                         'stash' => 'If set, the server will not add the file to the repository ' .
 747                                 'and stash it temporarily.',
 748
 749                         'chunk' => 'Chunk contents',
 750                         'offset' => 'Offset of chunk in bytes',
 751                         'filesize' => 'Filesize of entire upload',
 752
 753                         'async' => 'Make potentially large file operations asynchronous when possible',
 754                         'asyncdownload' => 'Make fetching a URL asynchronous',
 755                         'leavemessage' => 'If asyncdownload is used, leave a message on the user talk page if finished',
 756                         'statuskey' => 'Fetch the upload status for this file key (upload by URL)',
 757                         'checkstatus' => 'Only fetch the upload status for the given file key',
 758                 );
 759
 760                 return $params;
 761         }
 762
 763         public function getResultProperties() {
 764                 return array(
 765                         '' => array(
 766                                 'result' => array(
 767                                         ApiBase::PROP_TYPE => array(
 768                                                 'Success',
 769                                                 'Warning',
 770                                                 'Continue',
 771                                                 'Queued'
 772                                         ),
 773                                 ),
 774                                 'filekey' => array(
 775                                         ApiBase::PROP_TYPE => 'string',
 776                                         ApiBase::PROP_NULLABLE => true
 777                                 ),
 778                                 'sessionkey' => array(
 779                                         ApiBase::PROP_TYPE => 'string',
 780                                         ApiBase::PROP_NULLABLE => true
 781                                 ),
 782                                 'offset' => array(
 783                                         ApiBase::PROP_TYPE => 'integer',
 784                                         ApiBase::PROP_NULLABLE => true
 785                                 ),
 786                                 'statuskey' => array(
 787                                         ApiBase::PROP_TYPE => 'string',
 788                                         ApiBase::PROP_NULLABLE => true
 789                                 ),
 790                                 'filename' => array(
 791                                         ApiBase::PROP_TYPE => 'string',
 792                                         ApiBase::PROP_NULLABLE => true
 793                                 )
 794                         )
 795                 );
 796         }
 797
 798         public function getDescription() {
 799                 return array(
 800                         'Upload a file, or get the status of pending uploads. Several methods are available:',
 801                         ' * Upload file contents directly, using the "file" parameter',
 802                         ' * Have the MediaWiki server fetch a file from a URL, using the "url" parameter',
 803                         ' * Complete an earlier upload that failed due to warnings, using the "filekey" parameter',
 804                         'Note that the HTTP POST must be done as a file upload (i.e. using multipart/form-data) when',
 805                         'sending the "file". Also you must get and send an edit token before doing any upload stuff.'
 806                 );
 807         }
 808
 809         public function getPossibleErrors() {
 810                 return array_merge( parent::getPossibleErrors(),
 811                         $this->getRequireOnlyOneParameterErrorMessages( array( 'filekey', 'file', 'url', 'statuskey' ) ),
 812                         array(
 813                                 array( 'uploaddisabled' ),
 814                                 array( 'invalid-file-key' ),
 815                                 array( 'uploaddisabled' ),
 816                                 array( 'mustbeloggedin', 'upload' ),
 817                                 array( 'badaccess-groups' ),
 818                                 array( 'code' => 'fetchfileerror', 'info' => '' ),
 819                                 array( 'code' => 'nomodule', 'info' => 'No upload module set' ),
 820                                 array( 'code' => 'empty-file', 'info' => 'The file you submitted was empty' ),
 821                                 array( 'code' => 'filetype-missing', 'info' => 'The file is missing an extension' ),
 822                                 array( 'code' => 'filename-tooshort', 'info' => 'The filename is too short' ),
 823                                 array( 'code' => 'overwrite', 'info' => 'Overwriting an existing file is not allowed' ),
 824                                 array( 'code' => 'stashfailed', 'info' => 'Stashing temporary file failed' ),
 825                                 array( 'code' => 'publishfailed', 'info' => 'Publishing of stashed file failed' ),
 826                                 array( 'code' => 'internal-error', 'info' => 'An internal error occurred' ),
 827                                 array( 'code' => 'asynccopyuploaddisabled', 'info' => 'Asynchronous copy uploads disabled' ),
 828                                 array( 'code' => 'stasherror', 'info' => 'An upload stash error occurred' ),
 829                                 array( 'fileexists-forbidden' ),
 830                                 array( 'fileexists-shared-forbidden' ),
 831                         )
 832                 );
 833         }
 834
 835         public function needsToken() {
 836                 return true;
 837         }
 838
 839         public function getTokenSalt() {
 840                 return '';
 841         }
 842
 843         public function getExamples() {
 844                 return array(
 845                         'api.php?action=upload&filename=Wiki.png' .
 846                         '&url=http%3A//upload.wikimedia.org/wikipedia/en/b/bc/Wiki.png'
 847                                 => 'Upload from a URL',
 848                         'api.php?action=upload&filename=Wiki.png&filekey=filekey&ignorewarnings=1'
 849                                 => 'Complete an upload that failed due to warnings',
 850                 );
 851         }
 852
 853         public function getHelpUrls() {
 854                 return 'https://www.mediawiki.org/wiki/API:Upload';
 855         }
 856 }