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|UploadFromChunks */
  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'] &&
  49                         $this->getConfig()->get( 'EnableAsyncUploads' ) );
  50                 // Add the uploaded file to the params array
  51                 $this->mParams['file'] = $request->getFileName( 'file' );
  52                 $this->mParams['chunk'] = $request->getFileName( 'chunk' );
  53
  54                 // Copy the session key to the file key, for backward compatibility.
  55                 if ( !$this->mParams['filekey'] && $this->mParams['sessionkey'] ) {
  56                         $this->mParams['filekey'] = $this->mParams['sessionkey'];
  57                 }
  58
  59                 // Select an upload module
  60                 try {
  61                         if ( !$this->selectUploadModule() ) {
  62                                 return; // not a true upload, but a status request or similar
  63                         } elseif ( !isset( $this->mUpload ) ) {
  64                                 $this->dieUsage( 'No upload module set', 'nomodule' );
  65                         }
  66                 } catch ( UploadStashException $e ) { // XXX: don't spam exception log
  67                         $this->handleStashException( $e );
  68                 }
  69
  70                 // First check permission to upload
  71                 $this->checkPermissions( $user );
  72
  73                 // Fetch the file (usually a no-op)
  74                 /** @var $status Status */
  75                 $status = $this->mUpload->fetchFile();
  76                 if ( !$status->isGood() ) {
  77                         $errors = $status->getErrorsArray();
  78                         $error = array_shift( $errors[0] );
  79                         $this->dieUsage( 'Error fetching file from remote source', $error, 0, $errors[0] );
  80                 }
  81
  82                 // Check if the uploaded file is sane
  83                 if ( $this->mParams['chunk'] ) {
  84                         $maxSize = UploadBase::getMaxUploadSize();
  85                         if ( $this->mParams['filesize'] > $maxSize ) {
  86                                 $this->dieUsage( 'The file you submitted was too large', 'file-too-large' );
  87                         }
  88                         if ( !$this->mUpload->getTitle() ) {
  89                                 $this->dieUsage( 'Invalid file title supplied', 'internal-error' );
  90                         }
  91                 } elseif ( $this->mParams['async'] && $this->mParams['filekey'] ) {
  92                         // defer verification to background process
  93                 } else {
  94                         wfDebug( __METHOD__ . " about to verify\n" );
  95                         $this->verifyUpload();
  96                 }
  97
  98                 // Check if the user has the rights to modify or overwrite the requested title
  99                 // (This check is irrelevant if stashing is already requested, since the errors
 100                 //  can always be fixed by changing the title)
 101                 if ( !$this->mParams['stash'] ) {
 102                         $permErrors = $this->mUpload->verifyTitlePermissions( $user );
 103                         if ( $permErrors !== true ) {
 104                                 $this->dieRecoverableError( $permErrors[0], 'filename' );
 105                         }
 106                 }
 107
 108                 // Get the result based on the current upload context:
 109                 try {
 110                         $result = $this->getContextResult();
 111                         if ( $result['result'] === 'Success' ) {
 112                                 $result['imageinfo'] = $this->mUpload->getImageInfo( $this->getResult() );
 113                         }
 114                 } catch ( UploadStashException $e ) { // XXX: don't spam exception log
 115                         $this->handleStashException( $e );
 116                 }
 117
 118                 $this->getResult()->addValue( null, $this->getModuleName(), $result );
 119
 120                 // Cleanup any temporary mess
 121                 $this->mUpload->cleanupTempFile();
 122         }
 123
 124         /**
 125          * Get an upload result based on upload context
 126          * @return array
 127          */
 128         private function getContextResult() {
 129                 $warnings = $this->getApiWarnings();
 130                 if ( $warnings && !$this->mParams['ignorewarnings'] ) {
 131                         // Get warnings formatted in result array format
 132                         return $this->getWarningsResult( $warnings );
 133                 } elseif ( $this->mParams['chunk'] ) {
 134                         // Add chunk, and get result
 135                         return $this->getChunkResult( $warnings );
 136                 } elseif ( $this->mParams['stash'] ) {
 137                         // Stash the file and get stash result
 138                         return $this->getStashResult( $warnings );
 139                 }
 140
 141                 // Check throttle after we've handled warnings
 142                 if ( UploadBase::isThrottled( $this->getUser() )
 143                 ) {
 144                         $this->dieUsageMsg( 'actionthrottledtext' );
 145                 }
 146
 147                 // This is the most common case -- a normal upload with no warnings
 148                 // performUpload will return a formatted properly for the API with status
 149                 return $this->performUpload( $warnings );
 150         }
 151
 152         /**
 153          * Get Stash Result, throws an exception if the file could not be stashed.
 154          * @param array $warnings Array of Api upload warnings
 155          * @return array
 156          */
 157         private function getStashResult( $warnings ) {
 158                 $result = array();
 159                 // Some uploads can request they be stashed, so as not to publish them immediately.
 160                 // In this case, a failure to stash ought to be fatal
 161                 try {
 162                         $result['result'] = 'Success';
 163                         $result['filekey'] = $this->performStash();
 164                         $result['sessionkey'] = $result['filekey']; // backwards compatibility
 165                         if ( $warnings && count( $warnings ) > 0 ) {
 166                                 $result['warnings'] = $warnings;
 167                         }
 168                 } catch ( UploadStashException $e ) {
 169                         $this->handleStashException( $e );
 170                 } catch ( Exception $e ) {
 171                         $this->dieUsage( $e->getMessage(), 'stashfailed' );
 172                 }
 173
 174                 return $result;
 175         }
 176
 177         /**
 178          * Get Warnings Result
 179          * @param array $warnings Array of Api upload warnings
 180          * @return array
 181          */
 182         private function getWarningsResult( $warnings ) {
 183                 $result = array();
 184                 $result['result'] = 'Warning';
 185                 $result['warnings'] = $warnings;
 186                 // in case the warnings can be fixed with some further user action, let's stash this upload
 187                 // and return a key they can use to restart it
 188                 try {
 189                         $result['filekey'] = $this->performStash();
 190                         $result['sessionkey'] = $result['filekey']; // backwards compatibility
 191                 } catch ( Exception $e ) {
 192                         $result['warnings']['stashfailed'] = $e->getMessage();
 193                 }
 194
 195                 return $result;
 196         }
 197
 198         /**
 199          * Get the result of a chunk upload.
 200          * @param array $warnings Array of Api upload warnings
 201          * @return array
 202          */
 203         private function getChunkResult( $warnings ) {
 204                 $result = array();
 205
 206                 if ( $warnings && count( $warnings ) > 0 ) {
 207                         $result['warnings'] = $warnings;
 208                 }
 209
 210                 $request = $this->getMain()->getRequest();
 211                 $chunkPath = $request->getFileTempname( 'chunk' );
 212                 $chunkSize = $request->getUpload( 'chunk' )->getSize();
 213                 $totalSoFar = $this->mParams['offset'] + $chunkSize;
 214                 $minChunkSize = $this->getConfig()->get( 'MinUploadChunkSize' );
 215
 216                 // Sanity check sizing
 217                 if ( $totalSoFar > $this->mParams['filesize'] ) {
 218                         $this->dieUsage(
 219                                 'Offset plus current chunk is greater than claimed file size', 'invalid-chunk'
 220                         );
 221                 }
 222
 223                 // Enforce minimum chunk size
 224                 if ( $totalSoFar != $this->mParams['filesize'] && $chunkSize < $minChunkSize ) {
 225                         $this->dieUsage(
 226                                 "Minimum chunk size is $minChunkSize bytes for non-final chunks", 'chunk-too-small'
 227                         );
 228                 }
 229
 230                 if ( $this->mParams['offset'] == 0 ) {
 231                         try {
 232                                 $filekey = $this->performStash();
 233                         } catch ( UploadStashException $e ) {
 234                                 $this->handleStashException( $e );
 235                         } catch ( Exception $e ) {
 236                                 // FIXME: Error handling here is wrong/different from rest of this
 237                                 $this->dieUsage( $e->getMessage(), 'stashfailed' );
 238                         }
 239                 } else {
 240                         $filekey = $this->mParams['filekey'];
 241
 242                         // Don't allow further uploads to an already-completed session
 243                         $progress = UploadBase::getSessionStatus( $this->getUser(), $filekey );
 244                         if ( !$progress ) {
 245                                 // Probably can't get here, but check anyway just in case
 246                                 $this->dieUsage( 'No chunked upload session with this key', 'stashfailed' );
 247                         } elseif ( $progress['result'] !== 'Continue' || $progress['stage'] !== 'uploading' ) {
 248                                 $this->dieUsage(
 249                                         'Chunked upload is already completed, check status for details', 'stashfailed'
 250                                 );
 251                         }
 252
 253                         $status = $this->mUpload->addChunk(
 254                                 $chunkPath, $chunkSize, $this->mParams['offset'] );
 255                         if ( !$status->isGood() ) {
 256                                 $extradata = array(
 257                                         'offset' => $this->mUpload->getOffset(),
 258                                 );
 259
 260                                 $this->dieUsage( $status->getWikiText(), 'stashfailed', 0, $extradata );
 261                         }
 262                 }
 263
 264                 // Check we added the last chunk:
 265                 if ( $totalSoFar == $this->mParams['filesize'] ) {
 266                         if ( $this->mParams['async'] ) {
 267                                 UploadBase::setSessionStatus(
 268                                         $this->getUser(),
 269                                         $filekey,
 270                                         array( 'result' => 'Poll',
 271                                                 'stage' => 'queued', 'status' => Status::newGood() )
 272                                 );
 273                                 JobQueueGroup::singleton()->push( new AssembleUploadChunksJob(
 274                                         Title::makeTitle( NS_FILE, $filekey ),
 275                                         array(
 276                                                 'filename' => $this->mParams['filename'],
 277                                                 'filekey' => $filekey,
 278                                                 'session' => $this->getContext()->exportSession()
 279                                         )
 280                                 ) );
 281                                 $result['result'] = 'Poll';
 282                                 $result['stage'] = 'queued';
 283                         } else {
 284                                 $status = $this->mUpload->concatenateChunks();
 285                                 if ( !$status->isGood() ) {
 286                                         UploadBase::setSessionStatus(
 287                                                 $this->getUser(),
 288                                                 $filekey,
 289                                                 array( 'result' => 'Failure', 'stage' => 'assembling', 'status' => $status )
 290                                         );
 291                                         $this->dieUsage( $status->getWikiText(), 'stashfailed' );
 292                                 }
 293
 294                                 // The fully concatenated file has a new filekey. So remove
 295                                 // the old filekey and fetch the new one.
 296                                 UploadBase::setSessionStatus( $this->getUser(), $filekey, false );
 297                                 $this->mUpload->stash->removeFile( $filekey );
 298                                 $filekey = $this->mUpload->getLocalFile()->getFileKey();
 299
 300                                 $result['result'] = 'Success';
 301                         }
 302                 } else {
 303                         UploadBase::setSessionStatus(
 304                                 $this->getUser(),
 305                                 $filekey,
 306                                 array(
 307                                         'result' => 'Continue',
 308                                         'stage' => 'uploading',
 309                                         'offset' => $totalSoFar,
 310                                         'status' => Status::newGood(),
 311                                 )
 312                         );
 313                         $result['result'] = 'Continue';
 314                         $result['offset'] = $totalSoFar;
 315                 }
 316
 317                 $result['filekey'] = $filekey;
 318
 319                 return $result;
 320         }
 321
 322         /**
 323          * Stash the file and return the file key
 324          * Also re-raises exceptions with slightly more informative message strings (useful for API)
 325          * @throws MWException
 326          * @return string File key
 327          */
 328         private function performStash() {
 329                 try {
 330                         $stashFile = $this->mUpload->stashFile( $this->getUser() );
 331
 332                         if ( !$stashFile ) {
 333                                 throw new MWException( 'Invalid stashed file' );
 334                         }
 335                         $fileKey = $stashFile->getFileKey();
 336                 } catch ( Exception $e ) {
 337                         $message = 'Stashing temporary file failed: ' . get_class( $e ) . ' ' . $e->getMessage();
 338                         wfDebug( __METHOD__ . ' ' . $message . "\n" );
 339                         $className = get_class( $e );
 340                         throw new $className( $message );
 341                 }
 342
 343                 return $fileKey;
 344         }
 345
 346         /**
 347          * Throw an error that the user can recover from by providing a better
 348          * value for $parameter
 349          *
 350          * @param array $error Error array suitable for passing to dieUsageMsg()
 351          * @param string $parameter Parameter that needs revising
 352          * @param array $data Optional extra data to pass to the user
 353          * @throws UsageException
 354          */
 355         private function dieRecoverableError( $error, $parameter, $data = array() ) {
 356                 try {
 357                         $data['filekey'] = $this->performStash();
 358                         $data['sessionkey'] = $data['filekey'];
 359                 } catch ( Exception $e ) {
 360                         $data['stashfailed'] = $e->getMessage();
 361                 }
 362                 $data['invalidparameter'] = $parameter;
 363
 364                 $parsed = $this->parseMsg( $error );
 365                 $this->dieUsage( $parsed['info'], $parsed['code'], 0, $data );
 366         }
 367
 368         /**
 369          * Select an upload module and set it to mUpload. Dies on failure. If the
 370          * request was a status request and not a true upload, returns false;
 371          * otherwise true
 372          *
 373          * @return bool
 374          */
 375         protected function selectUploadModule() {
 376                 $request = $this->getMain()->getRequest();
 377
 378                 // chunk or one and only one of the following parameters is needed
 379                 if ( !$this->mParams['chunk'] ) {
 380                         $this->requireOnlyOneParameter( $this->mParams,
 381                                 'filekey', 'file', 'url', 'statuskey' );
 382                 }
 383
 384                 // Status report for "upload to stash"/"upload from stash"
 385                 if ( $this->mParams['filekey'] && $this->mParams['checkstatus'] ) {
 386                         $progress = UploadBase::getSessionStatus( $this->getUser(), $this->mParams['filekey'] );
 387                         if ( !$progress ) {
 388                                 $this->dieUsage( 'No result in status data', 'missingresult' );
 389                         } elseif ( !$progress['status']->isGood() ) {
 390                                 $this->dieUsage( $progress['status']->getWikiText(), 'stashfailed' );
 391                         }
 392                         if ( isset( $progress['status']->value['verification'] ) ) {
 393                                 $this->checkVerification( $progress['status']->value['verification'] );
 394                         }
 395                         unset( $progress['status'] ); // remove Status object
 396                         $this->getResult()->addValue( null, $this->getModuleName(), $progress );
 397
 398                         return false;
 399                 }
 400
 401                 if ( $this->mParams['statuskey'] ) {
 402                         $this->checkAsyncDownloadEnabled();
 403
 404                         // Status request for an async upload
 405                         $sessionData = UploadFromUrlJob::getSessionData( $this->mParams['statuskey'] );
 406                         if ( !isset( $sessionData['result'] ) ) {
 407                                 $this->dieUsage( 'No result in session data', 'missingresult' );
 408                         }
 409                         if ( $sessionData['result'] == 'Warning' ) {
 410                                 $sessionData['warnings'] = $this->transformWarnings( $sessionData['warnings'] );
 411                                 $sessionData['sessionkey'] = $this->mParams['statuskey'];
 412                         }
 413                         $this->getResult()->addValue( null, $this->getModuleName(), $sessionData );
 414
 415                         return false;
 416                 }
 417
 418                 // The following modules all require the filename parameter to be set
 419                 if ( is_null( $this->mParams['filename'] ) ) {
 420                         $this->dieUsageMsg( array( 'missingparam', 'filename' ) );
 421                 }
 422
 423                 if ( $this->mParams['chunk'] ) {
 424                         // Chunk upload
 425                         $this->mUpload = new UploadFromChunks();
 426                         if ( isset( $this->mParams['filekey'] ) ) {
 427                                 if ( $this->mParams['offset'] === 0 ) {
 428                                         $this->dieUsage( 'Cannot supply a filekey when offset is 0', 'badparams' );
 429                                 }
 430
 431                                 // handle new chunk
 432                                 $this->mUpload->continueChunks(
 433                                         $this->mParams['filename'],
 434                                         $this->mParams['filekey'],
 435                                         $request->getUpload( 'chunk' )
 436                                 );
 437                         } else {
 438                                 if ( $this->mParams['offset'] !== 0 ) {
 439                                         $this->dieUsage( 'Must supply a filekey when offset is non-zero', 'badparams' );
 440                                 }
 441
 442                                 // handle first chunk
 443                                 $this->mUpload->initialize(
 444                                         $this->mParams['filename'],
 445                                         $request->getUpload( 'chunk' )
 446                                 );
 447                         }
 448                 } elseif ( isset( $this->mParams['filekey'] ) ) {
 449                         // Upload stashed in a previous request
 450                         if ( !UploadFromStash::isValidKey( $this->mParams['filekey'] ) ) {
 451                                 $this->dieUsageMsg( 'invalid-file-key' );
 452                         }
 453
 454                         $this->mUpload = new UploadFromStash( $this->getUser() );
 455                         // This will not download the temp file in initialize() in async mode.
 456                         // We still have enough information to call checkWarnings() and such.
 457                         $this->mUpload->initialize(
 458                                 $this->mParams['filekey'], $this->mParams['filename'], !$this->mParams['async']
 459                         );
 460                 } elseif ( isset( $this->mParams['file'] ) ) {
 461                         $this->mUpload = new UploadFromFile();
 462                         $this->mUpload->initialize(
 463                                 $this->mParams['filename'],
 464                                 $request->getUpload( 'file' )
 465                         );
 466                 } elseif ( isset( $this->mParams['url'] ) ) {
 467                         // Make sure upload by URL is enabled:
 468                         if ( !UploadFromUrl::isEnabled() ) {
 469                                 $this->dieUsageMsg( 'copyuploaddisabled' );
 470                         }
 471
 472                         if ( !UploadFromUrl::isAllowedHost( $this->mParams['url'] ) ) {
 473                                 $this->dieUsageMsg( 'copyuploadbaddomain' );
 474                         }
 475
 476                         if ( !UploadFromUrl::isAllowedUrl( $this->mParams['url'] ) ) {
 477                                 $this->dieUsageMsg( 'copyuploadbadurl' );
 478                         }
 479
 480                         $async = false;
 481                         if ( $this->mParams['asyncdownload'] ) {
 482                                 $this->checkAsyncDownloadEnabled();
 483
 484                                 if ( $this->mParams['leavemessage'] && !$this->mParams['ignorewarnings'] ) {
 485                                         $this->dieUsage( 'Using leavemessage without ignorewarnings is not supported',
 486                                                 'missing-ignorewarnings' );
 487                                 }
 488
 489                                 if ( $this->mParams['leavemessage'] ) {
 490                                         $async = 'async-leavemessage';
 491                                 } else {
 492                                         $async = 'async';
 493                                 }
 494                         }
 495                         $this->mUpload = new UploadFromUrl;
 496                         $this->mUpload->initialize( $this->mParams['filename'],
 497                                 $this->mParams['url'], $async );
 498                 }
 499
 500                 return true;
 501         }
 502
 503         /**
 504          * Checks that the user has permissions to perform this upload.
 505          * Dies with usage message on inadequate permissions.
 506          * @param User $user The user to check.
 507          */
 508         protected function checkPermissions( $user ) {
 509                 // Check whether the user has the appropriate permissions to upload anyway
 510                 $permission = $this->mUpload->isAllowed( $user );
 511
 512                 if ( $permission !== true ) {
 513                         if ( !$user->isLoggedIn() ) {
 514                                 $this->dieUsageMsg( array( 'mustbeloggedin', 'upload' ) );
 515                         }
 516
 517                         $this->dieUsageMsg( 'badaccess-groups' );
 518                 }
 519         }
 520
 521         /**
 522          * Performs file verification, dies on error.
 523          */
 524         protected function verifyUpload() {
 525                 $verification = $this->mUpload->verifyUpload();
 526                 if ( $verification['status'] === UploadBase::OK ) {
 527                         return;
 528                 }
 529
 530                 $this->checkVerification( $verification );
 531         }
 532
 533         /**
 534          * Performs file verification, dies on error.
 535          * @param array $verification
 536          */
 537         protected function checkVerification( array $verification ) {
 538                 // @todo Move them to ApiBase's message map
 539                 switch ( $verification['status'] ) {
 540                         // Recoverable errors
 541                         case UploadBase::MIN_LENGTH_PARTNAME:
 542                                 $this->dieRecoverableError( 'filename-tooshort', 'filename' );
 543                                 break;
 544                         case UploadBase::ILLEGAL_FILENAME:
 545                                 $this->dieRecoverableError( 'illegal-filename', 'filename',
 546                                         array( 'filename' => $verification['filtered'] ) );
 547                                 break;
 548                         case UploadBase::FILENAME_TOO_LONG:
 549                                 $this->dieRecoverableError( 'filename-toolong', 'filename' );
 550                                 break;
 551                         case UploadBase::FILETYPE_MISSING:
 552                                 $this->dieRecoverableError( 'filetype-missing', 'filename' );
 553                                 break;
 554                         case UploadBase::WINDOWS_NONASCII_FILENAME:
 555                                 $this->dieRecoverableError( 'windows-nonascii-filename', 'filename' );
 556                                 break;
 557
 558                         // Unrecoverable errors
 559                         case UploadBase::EMPTY_FILE:
 560                                 $this->dieUsage( 'The file you submitted was empty', 'empty-file' );
 561                                 break;
 562                         case UploadBase::FILE_TOO_LARGE:
 563                                 $this->dieUsage( 'The file you submitted was too large', 'file-too-large' );
 564                                 break;
 565
 566                         case UploadBase::FILETYPE_BADTYPE:
 567                                 $extradata = array(
 568                                         'filetype' => $verification['finalExt'],
 569                                         'allowed' => array_values( array_unique( $this->getConfig()->get( 'FileExtensions' ) ) )
 570                                 );
 571                                 ApiResult::setIndexedTagName( $extradata['allowed'], 'ext' );
 572
 573                                 $msg = "Filetype not permitted: ";
 574                                 if ( isset( $verification['blacklistedExt'] ) ) {
 575                                         $msg .= join( ', ', $verification['blacklistedExt'] );
 576                                         $extradata['blacklisted'] = array_values( $verification['blacklistedExt'] );
 577                                         ApiResult::setIndexedTagName( $extradata['blacklisted'], 'ext' );
 578                                 } else {
 579                                         $msg .= $verification['finalExt'];
 580                                 }
 581                                 $this->dieUsage( $msg, 'filetype-banned', 0, $extradata );
 582                                 break;
 583                         case UploadBase::VERIFICATION_ERROR:
 584                                 $params = $verification['details'];
 585                                 $key = array_shift( $params );
 586                                 $msg = $this->msg( $key, $params )->inLanguage( 'en' )->useDatabase( false )->text();
 587                                 ApiResult::setIndexedTagName( $verification['details'], 'detail' );
 588                                 $this->dieUsage( "This file did not pass file verification: $msg", 'verification-error',
 589                                         0, array( 'details' => $verification['details'] ) );
 590                                 break;
 591                         case UploadBase::HOOK_ABORTED:
 592                                 if ( is_array( $verification['error'] ) ) {
 593                                         $params = $verification['error'];
 594                                 } elseif ( $verification['error'] !== '' ) {
 595                                         $params = array( $verification['error'] );
 596                                 } else {
 597                                         $params = array( 'hookaborted' );
 598                                 }
 599                                 $key = array_shift( $params );
 600                                 $msg = $this->msg( $key, $params )->inLanguage( 'en' )->useDatabase( false )->text();
 601                                 $this->dieUsage( $msg, 'hookaborted', 0, array( 'details' => $verification['error'] ) );
 602                                 break;
 603                         default:
 604                                 $this->dieUsage( 'An unknown error occurred', 'unknown-error',
 605                                         0, array( 'details' => array( 'code' => $verification['status'] ) ) );
 606                                 break;
 607                 }
 608         }
 609
 610         /**
 611          * Check warnings.
 612          * Returns a suitable array for inclusion into API results if there were warnings
 613          * Returns the empty array if there were no warnings
 614          *
 615          * @return array
 616          */
 617         protected function getApiWarnings() {
 618                 $warnings = $this->mUpload->checkWarnings();
 619
 620                 return $this->transformWarnings( $warnings );
 621         }
 622
 623         protected function transformWarnings( $warnings ) {
 624                 if ( $warnings ) {
 625                         // Add indices
 626                         $result = $this->getResult();
 627                         ApiResult::setIndexedTagName( $warnings, 'warning' );
 628
 629                         if ( isset( $warnings['duplicate'] ) ) {
 630                                 $dupes = array();
 631                                 /** @var File $dupe */
 632                                 foreach ( $warnings['duplicate'] as $dupe ) {
 633                                         $dupes[] = $dupe->getName();
 634                                 }
 635                                 ApiResult::setIndexedTagName( $dupes, 'duplicate' );
 636                                 $warnings['duplicate'] = $dupes;
 637                         }
 638
 639                         if ( isset( $warnings['exists'] ) ) {
 640                                 $warning = $warnings['exists'];
 641                                 unset( $warnings['exists'] );
 642                                 /** @var LocalFile $localFile */
 643                                 $localFile = isset( $warning['normalizedFile'] )
 644                                         ? $warning['normalizedFile']
 645                                         : $warning['file'];
 646                                 $warnings[$warning['warning']] = $localFile->getName();
 647                         }
 648                 }
 649
 650                 return $warnings;
 651         }
 652
 653         /**
 654          * Handles a stash exception, giving a useful error to the user.
 655          * @param Exception $e The exception we encountered.
 656          */
 657         protected function handleStashException( $e ) {
 658                 $exceptionType = get_class( $e );
 659
 660                 switch ( $exceptionType ) {
 661                         case 'UploadStashFileNotFoundException':
 662                                 $this->dieUsage(
 663                                         'Could not find the file in the stash: ' . $e->getMessage(),
 664                                         'stashedfilenotfound'
 665                                 );
 666                                 break;
 667                         case 'UploadStashBadPathException':
 668                                 $this->dieUsage(
 669                                         'File key of improper format or otherwise invalid: ' . $e->getMessage(),
 670                                         'stashpathinvalid'
 671                                 );
 672                                 break;
 673                         case 'UploadStashFileException':
 674                                 $this->dieUsage(
 675                                         'Could not store upload in the stash: ' . $e->getMessage(),
 676                                         'stashfilestorage'
 677                                 );
 678                                 break;
 679                         case 'UploadStashZeroLengthFileException':
 680                                 $this->dieUsage(
 681                                         'File is of zero length, and could not be stored in the stash: ' .
 682                                                 $e->getMessage(),
 683                                         'stashzerolength'
 684                                 );
 685                                 break;
 686                         case 'UploadStashNotLoggedInException':
 687                                 $this->dieUsage( 'Not logged in: ' . $e->getMessage(), 'stashnotloggedin' );
 688                                 break;
 689                         case 'UploadStashWrongOwnerException':
 690                                 $this->dieUsage( 'Wrong owner: ' . $e->getMessage(), 'stashwrongowner' );
 691                                 break;
 692                         case 'UploadStashNoSuchKeyException':
 693                                 $this->dieUsage( 'No such filekey: ' . $e->getMessage(), 'stashnosuchfilekey' );
 694                                 break;
 695                         default:
 696                                 $this->dieUsage( $exceptionType . ": " . $e->getMessage(), 'stasherror' );
 697                                 break;
 698                 }
 699         }
 700
 701         /**
 702          * Perform the actual upload. Returns a suitable result array on success;
 703          * dies on failure.
 704          *
 705          * @param array $warnings Array of Api upload warnings
 706          * @return array
 707          */
 708         protected function performUpload( $warnings ) {
 709                 // Use comment as initial page text by default
 710                 if ( is_null( $this->mParams['text'] ) ) {
 711                         $this->mParams['text'] = $this->mParams['comment'];
 712                 }
 713
 714                 /** @var $file File */
 715                 $file = $this->mUpload->getLocalFile();
 716
 717                 // For preferences mode, we want to watch if 'watchdefault' is set or
 718                 // if the *file* doesn't exist and 'watchcreations' is set. But
 719                 // getWatchlistValue()'s automatic handling checks if the *title*
 720                 // exists or not, so we need to check both prefs manually.
 721                 $watch = $this->getWatchlistValue(
 722                         $this->mParams['watchlist'], $file->getTitle(), 'watchdefault'
 723                 );
 724                 if ( !$watch && $this->mParams['watchlist'] == 'preferences' && !$file->exists() ) {
 725                         $watch = $this->getWatchlistValue(
 726                                 $this->mParams['watchlist'], $file->getTitle(), 'watchcreations'
 727                         );
 728                 }
 729
 730                 // Deprecated parameters
 731                 if ( $this->mParams['watch'] ) {
 732                         $watch = true;
 733                 }
 734
 735                 // No errors, no warnings: do the upload
 736                 if ( $this->mParams['async'] ) {
 737                         $progress = UploadBase::getSessionStatus( $this->getUser(), $this->mParams['filekey'] );
 738                         if ( $progress && $progress['result'] === 'Poll' ) {
 739                                 $this->dieUsage( "Upload from stash already in progress.", 'publishfailed' );
 740                         }
 741                         UploadBase::setSessionStatus(
 742                                 $this->getUser(),
 743                                 $this->mParams['filekey'],
 744                                 array( 'result' => 'Poll', 'stage' => 'queued', 'status' => Status::newGood() )
 745                         );
 746                         JobQueueGroup::singleton()->push( new PublishStashedFileJob(
 747                                 Title::makeTitle( NS_FILE, $this->mParams['filename'] ),
 748                                 array(
 749                                         'filename' => $this->mParams['filename'],
 750                                         'filekey' => $this->mParams['filekey'],
 751                                         'comment' => $this->mParams['comment'],
 752                                         'text' => $this->mParams['text'],
 753                                         'watch' => $watch,
 754                                         'session' => $this->getContext()->exportSession()
 755                                 )
 756                         ) );
 757                         $result['result'] = 'Poll';
 758                         $result['stage'] = 'queued';
 759                 } else {
 760                         /** @var $status Status */
 761                         $status = $this->mUpload->performUpload( $this->mParams['comment'],
 762                                 $this->mParams['text'], $watch, $this->getUser() );
 763
 764                         if ( !$status->isGood() ) {
 765                                 $error = $status->getErrorsArray();
 766
 767                                 if ( count( $error ) == 1 && $error[0][0] == 'async' ) {
 768                                         // The upload can not be performed right now, because the user
 769                                         // requested so
 770                                         return array(
 771                                                 'result' => 'Queued',
 772                                                 'statuskey' => $error[0][1],
 773                                         );
 774                                 }
 775
 776                                 ApiResult::setIndexedTagName( $error, 'error' );
 777                                 $this->dieUsage( 'An internal error occurred', 'internal-error', 0, $error );
 778                         }
 779                         $result['result'] = 'Success';
 780                 }
 781
 782                 $result['filename'] = $file->getName();
 783                 if ( $warnings && count( $warnings ) > 0 ) {
 784                         $result['warnings'] = $warnings;
 785                 }
 786
 787                 return $result;
 788         }
 789
 790         /**
 791          * Checks if asynchronous copy uploads are enabled and throws an error if they are not.
 792          */
 793         protected function checkAsyncDownloadEnabled() {
 794                 if ( !$this->getConfig()->get( 'AllowAsyncCopyUploads' ) ) {
 795                         $this->dieUsage( 'Asynchronous copy uploads disabled', 'asynccopyuploaddisabled' );
 796                 }
 797         }
 798
 799         public function mustBePosted() {
 800                 return true;
 801         }
 802
 803         public function isWriteMode() {
 804                 return true;
 805         }
 806
 807         public function getAllowedParams() {
 808                 $params = array(
 809                         'filename' => array(
 810                                 ApiBase::PARAM_TYPE => 'string',
 811                         ),
 812                         'comment' => array(
 813                                 ApiBase::PARAM_DFLT => ''
 814                         ),
 815                         'text' => array(
 816                                 ApiBase::PARAM_TYPE => 'text',
 817                         ),
 818                         'watch' => array(
 819                                 ApiBase::PARAM_DFLT => false,
 820                                 ApiBase::PARAM_DEPRECATED => true,
 821                         ),
 822                         'watchlist' => array(
 823                                 ApiBase::PARAM_DFLT => 'preferences',
 824                                 ApiBase::PARAM_TYPE => array(
 825                                         'watch',
 826                                         'preferences',
 827                                         'nochange'
 828                                 ),
 829                         ),
 830                         'ignorewarnings' => false,
 831                         'file' => array(
 832                                 ApiBase::PARAM_TYPE => 'upload',
 833                         ),
 834                         'url' => null,
 835                         'filekey' => null,
 836                         'sessionkey' => array(
 837                                 ApiBase::PARAM_DEPRECATED => true,
 838                         ),
 839                         'stash' => false,
 840
 841                         'filesize' => array(
 842                                 ApiBase::PARAM_TYPE => 'integer',
 843                                 ApiBase::PARAM_MIN => 0,
 844                                 ApiBase::PARAM_MAX => UploadBase::getMaxUploadSize(),
 845                         ),
 846                         'offset' => array(
 847                                 ApiBase::PARAM_TYPE => 'integer',
 848                                 ApiBase::PARAM_MIN => 0,
 849                         ),
 850                         'chunk' => array(
 851                                 ApiBase::PARAM_TYPE => 'upload',
 852                         ),
 853
 854                         'async' => false,
 855                         'asyncdownload' => false,
 856                         'leavemessage' => false,
 857                         'statuskey' => null,
 858                         'checkstatus' => false,
 859                 );
 860
 861                 return $params;
 862         }
 863
 864         public function needsToken() {
 865                 return 'csrf';
 866         }
 867
 868         protected function getExamplesMessages() {
 869                 return array(
 870                         'action=upload&filename=Wiki.png' .
 871                                 '&url=http%3A//upload.wikimedia.org/wikipedia/en/b/bc/Wiki.png&token=123ABC'
 872                                 => 'apihelp-upload-example-url',
 873                         'action=upload&filename=Wiki.png&filekey=filekey&ignorewarnings=1&token=123ABC'
 874                                 => 'apihelp-upload-example-filekey',
 875                 );
 876         }
 877
 878         public function getHelpUrls() {
 879                 return 'https://www.mediawiki.org/wiki/API:Upload';
 880         }
 881 }