includes/api/ApiUpload.php

   1 <?php
   2 /**
   3  *
   4  *
   5  * Created on Aug 21, 2008
   6  *
   7  * Copyright © 2008 - 2010 Bryan Tong Minh <Bryan.TongMinh@Gmail.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  */
  26
  27 /**
  28  * @ingroup API
  29  */
  30 class ApiUpload extends ApiBase {
  31
  32         /**
  33          * @var UploadBase
  34          */
  35         protected $mUpload = null;
  36
  37         protected $mParams;
  38
  39         public function execute() {
  40                 global $wgEnableAsyncUploads;
  41
  42                 // Check whether upload is enabled
  43                 if ( !UploadBase::isEnabled() ) {
  44                         $this->dieUsageMsg( 'uploaddisabled' );
  45                 }
  46
  47                 $user = $this->getUser();
  48
  49                 // Parameter handling
  50                 $this->mParams = $this->extractRequestParams();
  51                 $request = $this->getMain()->getRequest();
  52                 // Check if async mode is actually supported (jobs done in cli mode)
  53                 $this->mParams['async'] = ( $this->mParams['async'] && $wgEnableAsyncUploads );
  54                 // Add the uploaded file to the params array
  55                 $this->mParams['file'] = $request->getFileName( 'file' );
  56                 $this->mParams['chunk'] = $request->getFileName( 'chunk' );
  57
  58                 // Copy the session key to the file key, for backward compatibility.
  59                 if( !$this->mParams['filekey'] && $this->mParams['sessionkey'] ) {
  60                         $this->mParams['filekey'] = $this->mParams['sessionkey'];
  61                 }
  62
  63                 // Select an upload module
  64                 if ( !$this->selectUploadModule() ) {
  65                         return; // not a true upload, but a status request or similar
  66                 } elseif ( !isset( $this->mUpload ) ) {
  67                         $this->dieUsage( 'No upload module set', 'nomodule' );
  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 = $this->mUpload->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'] ) {
  92                         // defer verification to background process
  93                 } else {
  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                 $result = $this->getContextResult();
 109                 if ( $result['result'] === 'Success' ) {
 110                         $result['imageinfo'] = $this->mUpload->getImageInfo( $this->getResult() );
 111                 }
 112
 113                 $this->getResult()->addValue( null, $this->getModuleName(), $result );
 114
 115                 // Cleanup any temporary mess
 116                 $this->mUpload->cleanupTempFile();
 117         }
 118
 119         /**
 120          * Get an upload result based on upload context
 121          * @return array
 122          */
 123         private function getContextResult() {
 124                 $warnings = $this->getApiWarnings();
 125                 if ( $warnings && !$this->mParams['ignorewarnings'] ) {
 126                         // Get warnings formatted in result array format
 127                         return $this->getWarningsResult( $warnings );
 128                 } elseif ( $this->mParams['chunk'] ) {
 129                         // Add chunk, and get result
 130                         return $this->getChunkResult( $warnings );
 131                 } elseif ( $this->mParams['stash'] ) {
 132                         // Stash the file and get stash result
 133                         return $this->getStashResult( $warnings );
 134                 }
 135                 // This is the most common case -- a normal upload with no warnings
 136                 // performUpload will return a formatted properly for the API with status
 137                 return $this->performUpload( $warnings );
 138         }
 139
 140         /**
 141          * Get Stash Result, throws an exception if the file could not be stashed.
 142          * @param $warnings array Array of Api upload warnings
 143          * @return array
 144          */
 145         private function getStashResult( $warnings ) {
 146                 $result = array ();
 147                 // Some uploads can request they be stashed, so as not to publish them immediately.
 148                 // In this case, a failure to stash ought to be fatal
 149                 try {
 150                         $result['result'] = 'Success';
 151                         $result['filekey'] = $this->performStash();
 152                         $result['sessionkey'] = $result['filekey']; // backwards compatibility
 153                         if ( $warnings && count( $warnings ) > 0 ) {
 154                                 $result['warnings'] = $warnings;
 155                         }
 156                 } catch ( MWException $e ) {
 157                         $this->dieUsage( $e->getMessage(), 'stashfailed' );
 158                 }
 159                 return $result;
 160         }
 161
 162         /**
 163          * Get Warnings Result
 164          * @param $warnings array Array of Api upload warnings
 165          * @return array
 166          */
 167         private function getWarningsResult( $warnings ) {
 168                 $result = array();
 169                 $result['result'] = 'Warning';
 170                 $result['warnings'] = $warnings;
 171                 // in case the warnings can be fixed with some further user action, let's stash this upload
 172                 // and return a key they can use to restart it
 173                 try {
 174                         $result['filekey'] = $this->performStash();
 175                         $result['sessionkey'] = $result['filekey']; // backwards compatibility
 176                 } catch ( MWException $e ) {
 177                         $result['warnings']['stashfailed'] = $e->getMessage();
 178                 }
 179                 return $result;
 180         }
 181
 182         /**
 183          * Get the result of a chunk upload.
 184          * @param $warnings array Array of Api upload warnings
 185          * @return array
 186          */
 187         private function getChunkResult( $warnings ) {
 188                 $result = array();
 189
 190                 $result['result'] = 'Continue';
 191                 if ( $warnings && count( $warnings ) > 0 ) {
 192                         $result['warnings'] = $warnings;
 193                 }
 194                 $request = $this->getMain()->getRequest();
 195                 $chunkPath = $request->getFileTempname( 'chunk' );
 196                 $chunkSize = $request->getUpload( 'chunk' )->getSize();
 197                 if ( $this->mParams['offset'] == 0 ) {
 198                         $filekey = $this->performStash();
 199                 } else {
 200                         $filekey = $this->mParams['filekey'];
 201                         /** @var $status Status */
 202                         $status = $this->mUpload->addChunk(
 203                                 $chunkPath, $chunkSize, $this->mParams['offset'] );
 204                         if ( !$status->isGood() ) {
 205                                 $this->dieUsage( $status->getWikiText(), 'stashfailed' );
 206                                 return array();
 207                         }
 208                 }
 209
 210                 // Check we added the last chunk:
 211                 if ( $this->mParams['offset'] + $chunkSize == $this->mParams['filesize'] ) {
 212                         if ( $this->mParams['async'] ) {
 213                                 $progress = UploadBase::getSessionStatus( $this->mParams['filekey'] );
 214                                 if ( $progress && $progress['result'] === 'Poll' ) {
 215                                         $this->dieUsage( "Chunk assembly already in progress.", 'stashfailed' );
 216                                 }
 217                                 UploadBase::setSessionStatus(
 218                                         $this->mParams['filekey'],
 219                                         array( 'result' => 'Poll',
 220                                                 'stage' => 'queued', 'status' => Status::newGood() )
 221                                 );
 222                                 $ok = JobQueueGroup::singleton()->push( new AssembleUploadChunksJob(
 223                                         Title::makeTitle( NS_FILE, $this->mParams['filekey'] ),
 224                                         array(
 225                                                 'filename'  => $this->mParams['filename'],
 226                                                 'filekey'   => $this->mParams['filekey'],
 227                                                 'session'   => $this->getRequest()->exportUserSession(),
 228                                                 'userid'    => $this->getUser()->getId()
 229                                         )
 230                                 ) );
 231                                 if ( $ok ) {
 232                                         $result['result'] = 'Poll';
 233                                 } else {
 234                                         UploadBase::setSessionStatus( $this->mParams['filekey'], false );
 235                                         $this->dieUsage(
 236                                                 "Failed to start AssembleUploadChunks.php", 'stashfailed' );
 237                                 }
 238                         } else {
 239                                 $status = $this->mUpload->concatenateChunks();
 240                                 if ( !$status->isGood() ) {
 241                                         $this->dieUsage( $status->getWikiText(), 'stashfailed' );
 242                                         return array();
 243                                 }
 244
 245                                 // The fully concatenated file has a new filekey. So remove
 246                                 // the old filekey and fetch the new one.
 247                                 $this->mUpload->stash->removeFile( $filekey );
 248                                 $filekey = $this->mUpload->getLocalFile()->getFileKey();
 249
 250                                 $result['result'] = 'Success';
 251                         }
 252                 }
 253                 $result['filekey'] = $filekey;
 254                 $result['offset'] = $this->mParams['offset'] + $chunkSize;
 255                 return $result;
 256         }
 257
 258         /**
 259          * Stash the file and return the file key
 260          * Also re-raises exceptions with slightly more informative message strings (useful for API)
 261          * @throws MWException
 262          * @return String file key
 263          */
 264         private function performStash() {
 265                 try {
 266                         $stashFile = $this->mUpload->stashFile();
 267
 268                         if ( !$stashFile ) {
 269                                 throw new MWException( 'Invalid stashed file' );
 270                         }
 271                         $fileKey = $stashFile->getFileKey();
 272                 } catch ( MWException $e ) {
 273                         $message = 'Stashing temporary file failed: ' . get_class( $e ) . ' ' . $e->getMessage();
 274                         wfDebug( __METHOD__ . ' ' . $message . "\n" );
 275                         throw new MWException( $message );
 276                 }
 277                 return $fileKey;
 278         }
 279
 280         /**
 281          * Throw an error that the user can recover from by providing a better
 282          * value for $parameter
 283          *
 284          * @param $error array Error array suitable for passing to dieUsageMsg()
 285          * @param $parameter string Parameter that needs revising
 286          * @param $data array Optional extra data to pass to the user
 287          * @throws UsageException
 288          */
 289         private function dieRecoverableError( $error, $parameter, $data = array() ) {
 290                 try {
 291                         $data['filekey'] = $this->performStash();
 292                         $data['sessionkey'] = $data['filekey'];
 293                 } catch ( MWException $e ) {
 294                         $data['stashfailed'] = $e->getMessage();
 295                 }
 296                 $data['invalidparameter'] = $parameter;
 297
 298                 $parsed = $this->parseMsg( $error );
 299                 $this->dieUsage( $parsed['info'], $parsed['code'], 0, $data );
 300         }
 301
 302         /**
 303          * Select an upload module and set it to mUpload. Dies on failure. If the
 304          * request was a status request and not a true upload, returns false;
 305          * otherwise true
 306          *
 307          * @return bool
 308          */
 309         protected function selectUploadModule() {
 310                 $request = $this->getMain()->getRequest();
 311
 312                 // chunk or one and only one of the following parameters is needed
 313                 if ( !$this->mParams['chunk'] ) {
 314                         $this->requireOnlyOneParameter( $this->mParams,
 315                                 'filekey', 'file', 'url', 'statuskey' );
 316                 }
 317
 318                 // Status report for "upload to stash"/"upload from stash"
 319                 if ( $this->mParams['filekey'] && $this->mParams['checkstatus'] ) {
 320                         $progress = UploadBase::getSessionStatus( $this->mParams['filekey'] );
 321                         if ( !$progress ) {
 322                                 $this->dieUsage( 'No result in status data', 'missingresult' );
 323                         } elseif ( !$progress['status']->isGood() ) {
 324                                 $this->dieUsage( $progress['status']->getWikiText(), 'stashfailed' );
 325                         }
 326                         if ( isset( $progress['status']->value['verification'] ) ) {
 327                                 $this->checkVerification( $progress['status']->value['verification'] );
 328                         }
 329                         unset( $progress['status'] ); // remove Status object
 330                         $this->getResult()->addValue( null, $this->getModuleName(), $progress );
 331                         return false;
 332                 }
 333
 334                 if ( $this->mParams['statuskey'] ) {
 335                         $this->checkAsyncDownloadEnabled();
 336
 337                         // Status request for an async upload
 338                         $sessionData = UploadFromUrlJob::getSessionData( $this->mParams['statuskey'] );
 339                         if ( !isset( $sessionData['result'] ) ) {
 340                                 $this->dieUsage( 'No result in session data', 'missingresult' );
 341                         }
 342                         if ( $sessionData['result'] == 'Warning' ) {
 343                                 $sessionData['warnings'] = $this->transformWarnings( $sessionData['warnings'] );
 344                                 $sessionData['sessionkey'] = $this->mParams['statuskey'];
 345                         }
 346                         $this->getResult()->addValue( null, $this->getModuleName(), $sessionData );
 347                         return false;
 348                 }
 349
 350                 // The following modules all require the filename parameter to be set
 351                 if ( is_null( $this->mParams['filename'] ) ) {
 352                         $this->dieUsageMsg( array( 'missingparam', 'filename' ) );
 353                 }
 354
 355                 if ( $this->mParams['chunk'] ) {
 356                         // Chunk upload
 357                         $this->mUpload = new UploadFromChunks();
 358                         if( isset( $this->mParams['filekey'] ) ) {
 359                                 // handle new chunk
 360                                 $this->mUpload->continueChunks(
 361                                         $this->mParams['filename'],
 362                                         $this->mParams['filekey'],
 363                                         $request->getUpload( 'chunk' )
 364                                 );
 365                         } else {
 366                                 // handle first chunk
 367                                 $this->mUpload->initialize(
 368                                         $this->mParams['filename'],
 369                                         $request->getUpload( 'chunk' )
 370                                 );
 371                         }
 372                 } elseif ( isset( $this->mParams['filekey'] ) ) {
 373                         // Upload stashed in a previous request
 374                         if ( !UploadFromStash::isValidKey( $this->mParams['filekey'] ) ) {
 375                                 $this->dieUsageMsg( 'invalid-file-key' );
 376                         }
 377
 378                         $this->mUpload = new UploadFromStash( $this->getUser() );
 379                         // This will not download the temp file in initialize() in async mode.
 380                         // We still have enough information to call checkWarnings() and such.
 381                         $this->mUpload->initialize(
 382                                 $this->mParams['filekey'], $this->mParams['filename'], !$this->mParams['async']
 383                         );
 384                 } elseif ( isset( $this->mParams['file'] ) ) {
 385                         $this->mUpload = new UploadFromFile();
 386                         $this->mUpload->initialize(
 387                                 $this->mParams['filename'],
 388                                 $request->getUpload( 'file' )
 389                         );
 390                 } elseif ( isset( $this->mParams['url'] ) ) {
 391                         // Make sure upload by URL is enabled:
 392                         if ( !UploadFromUrl::isEnabled() ) {
 393                                 $this->dieUsageMsg( 'copyuploaddisabled' );
 394                         }
 395
 396                         if ( !UploadFromUrl::isAllowedHost( $this->mParams['url'] ) ) {
 397                                 $this->dieUsageMsg( 'copyuploadbaddomain' );
 398                         }
 399
 400                         $async = false;
 401                         if ( $this->mParams['asyncdownload'] ) {
 402                                 $this->checkAsyncDownloadEnabled();
 403
 404                                 if ( $this->mParams['leavemessage'] && !$this->mParams['ignorewarnings'] ) {
 405                                         $this->dieUsage( 'Using leavemessage without ignorewarnings is not supported',
 406                                                 'missing-ignorewarnings' );
 407                                 }
 408
 409                                 if ( $this->mParams['leavemessage'] ) {
 410                                         $async = 'async-leavemessage';
 411                                 } else {
 412                                         $async = 'async';
 413                                 }
 414                         }
 415                         $this->mUpload = new UploadFromUrl;
 416                         $this->mUpload->initialize( $this->mParams['filename'],
 417                                 $this->mParams['url'], $async );
 418                 }
 419
 420                 return true;
 421         }
 422
 423         /**
 424          * Checks that the user has permissions to perform this upload.
 425          * Dies with usage message on inadequate permissions.
 426          * @param $user User The user to check.
 427          */
 428         protected function checkPermissions( $user ) {
 429                 // Check whether the user has the appropriate permissions to upload anyway
 430                 $permission = $this->mUpload->isAllowed( $user );
 431
 432                 if ( $permission !== true ) {
 433                         if ( !$user->isLoggedIn() ) {
 434                                 $this->dieUsageMsg( array( 'mustbeloggedin', 'upload' ) );
 435                         } else {
 436                                 $this->dieUsageMsg( 'badaccess-groups' );
 437                         }
 438                 }
 439         }
 440
 441         /**
 442          * Performs file verification, dies on error.
 443          */
 444         protected function verifyUpload( ) {
 445                 $verification = $this->mUpload->verifyUpload( );
 446                 if ( $verification['status'] === UploadBase::OK ) {
 447                         return;
 448                 } else {
 449                         return $this->checkVerification( $verification );
 450                 }
 451         }
 452
 453         /**
 454          * Performs file verification, dies on error.
 455          */
 456         protected function checkVerification( array $verification ) {
 457                 global $wgFileExtensions;
 458
 459                 // TODO: Move them to ApiBase's message map
 460                 switch( $verification['status'] ) {
 461                         // Recoverable errors
 462                         case UploadBase::MIN_LENGTH_PARTNAME:
 463                                 $this->dieRecoverableError( 'filename-tooshort', 'filename' );
 464                                 break;
 465                         case UploadBase::ILLEGAL_FILENAME:
 466                                 $this->dieRecoverableError( 'illegal-filename', 'filename',
 467                                                 array( 'filename' => $verification['filtered'] ) );
 468                                 break;
 469                         case UploadBase::FILENAME_TOO_LONG:
 470                                 $this->dieRecoverableError( 'filename-toolong', 'filename' );
 471                                 break;
 472                         case UploadBase::FILETYPE_MISSING:
 473                                 $this->dieRecoverableError( 'filetype-missing', 'filename' );
 474                                 break;
 475                         case UploadBase::WINDOWS_NONASCII_FILENAME:
 476                                 $this->dieRecoverableError( 'windows-nonascii-filename', 'filename' );
 477                                 break;
 478
 479                         // Unrecoverable errors
 480                         case UploadBase::EMPTY_FILE:
 481                                 $this->dieUsage( 'The file you submitted was empty', 'empty-file' );
 482                                 break;
 483                         case UploadBase::FILE_TOO_LARGE:
 484                                 $this->dieUsage( 'The file you submitted was too large', 'file-too-large' );
 485                                 break;
 486
 487                         case UploadBase::FILETYPE_BADTYPE:
 488                                 $extradata = array(
 489                                         'filetype' => $verification['finalExt'],
 490                                         'allowed' => $wgFileExtensions
 491                                 );
 492                                 $this->getResult()->setIndexedTagName( $extradata['allowed'], 'ext' );
 493
 494                                 $msg = "Filetype not permitted: ";
 495                                 if ( isset( $verification['blacklistedExt'] ) ) {
 496                                         $msg .= join( ', ', $verification['blacklistedExt'] );
 497                                         $extradata['blacklisted'] = array_values( $verification['blacklistedExt'] );
 498                                         $this->getResult()->setIndexedTagName( $extradata['blacklisted'], 'ext' );
 499                                 } else {
 500                                         $msg .= $verification['finalExt'];
 501                                 }
 502                                 $this->dieUsage( $msg, 'filetype-banned', 0, $extradata );
 503                                 break;
 504                         case UploadBase::VERIFICATION_ERROR:
 505                                 $this->getResult()->setIndexedTagName( $verification['details'], 'detail' );
 506                                 $this->dieUsage( 'This file did not pass file verification', 'verification-error',
 507                                                 0, array( 'details' => $verification['details'] ) );
 508                                 break;
 509                         case UploadBase::HOOK_ABORTED:
 510                                 $this->dieUsage( "The modification you tried to make was aborted by an extension hook",
 511                                                 'hookaborted', 0, array( 'error' => $verification['error'] ) );
 512                                 break;
 513                         default:
 514                                 $this->dieUsage( 'An unknown error occurred', 'unknown-error',
 515                                                 0, array( 'code' => $verification['status'] ) );
 516                                 break;
 517                 }
 518         }
 519
 520         /**
 521          * Check warnings.
 522          * Returns a suitable array for inclusion into API results if there were warnings
 523          * Returns the empty array if there were no warnings
 524          *
 525          * @return array
 526          */
 527         protected function getApiWarnings() {
 528                 $warnings = $this->mUpload->checkWarnings();
 529
 530                 return $this->transformWarnings( $warnings );
 531         }
 532
 533         protected function transformWarnings( $warnings ) {
 534                 if ( $warnings ) {
 535                         // Add indices
 536                         $result = $this->getResult();
 537                         $result->setIndexedTagName( $warnings, 'warning' );
 538
 539                         if ( isset( $warnings['duplicate'] ) ) {
 540                                 $dupes = array();
 541                                 foreach ( $warnings['duplicate'] as $dupe ) {
 542                                         $dupes[] = $dupe->getName();
 543                                 }
 544                                 $result->setIndexedTagName( $dupes, 'duplicate' );
 545                                 $warnings['duplicate'] = $dupes;
 546                         }
 547
 548                         if ( isset( $warnings['exists'] ) ) {
 549                                 $warning = $warnings['exists'];
 550                                 unset( $warnings['exists'] );
 551                                 $warnings[$warning['warning']] = $warning['file']->getName();
 552                         }
 553                 }
 554                 return $warnings;
 555         }
 556
 557         /**
 558          * Perform the actual upload. Returns a suitable result array on success;
 559          * dies on failure.
 560          *
 561          * @param $warnings array Array of Api upload warnings
 562          * @return array
 563          */
 564         protected function performUpload( $warnings ) {
 565                 // Use comment as initial page text by default
 566                 if ( is_null( $this->mParams['text'] ) ) {
 567                         $this->mParams['text'] = $this->mParams['comment'];
 568                 }
 569
 570                 /** @var $file File */
 571                 $file = $this->mUpload->getLocalFile();
 572                 $watch = $this->getWatchlistValue( $this->mParams['watchlist'], $file->getTitle() );
 573
 574                 // Deprecated parameters
 575                 if ( $this->mParams['watch'] ) {
 576                         $watch = true;
 577                 }
 578
 579                 // No errors, no warnings: do the upload
 580                 if ( $this->mParams['async'] ) {
 581                         $progress = UploadBase::getSessionStatus( $this->mParams['filekey'] );
 582                         if ( $progress && $progress['result'] === 'Poll' ) {
 583                                 $this->dieUsage( "Upload from stash already in progress.", 'publishfailed' );
 584                         }
 585                         UploadBase::setSessionStatus(
 586                                 $this->mParams['filekey'],
 587                                 array( 'result' => 'Poll', 'stage' => 'queued', 'status' => Status::newGood() )
 588                         );
 589                         $ok = JobQueueGroup::singleton()->push( new PublishStashedFileJob(
 590                                 Title::makeTitle( NS_FILE, $this->mParams['filename'] ),
 591                                 array(
 592                                         'filename'  => $this->mParams['filename'],
 593                                         'filekey'   => $this->mParams['filekey'],
 594                                         'comment'   => $this->mParams['comment'],
 595                                         'text'      => $this->mParams['text'],
 596                                         'watch'     => $watch,
 597                                         'session'   => $this->getRequest()->exportUserSession(),
 598                                         'userid'    => $this->getUser()->getId()
 599                                 )
 600                         ) );
 601                         if ( $ok ) {
 602                                 $result['result'] = 'Poll';
 603                         } else {
 604                                 UploadBase::setSessionStatus( $this->mParams['filekey'], false );
 605                                 $this->dieUsage(
 606                                         "Failed to start PublishStashedFile.php", 'publishfailed' );
 607                         }
 608                 } else {
 609                         /** @var $status Status */
 610                         $status = $this->mUpload->performUpload( $this->mParams['comment'],
 611                                 $this->mParams['text'], $watch, $this->getUser() );
 612
 613                         if ( !$status->isGood() ) {
 614                                 $error = $status->getErrorsArray();
 615
 616                                 if ( count( $error ) == 1 && $error[0][0] == 'async' ) {
 617                                         // The upload can not be performed right now, because the user
 618                                         // requested so
 619                                         return array(
 620                                                 'result' => 'Queued',
 621                                                 'statuskey' => $error[0][1],
 622                                         );
 623                                 } else {
 624                                         $this->getResult()->setIndexedTagName( $error, 'error' );
 625
 626                                         $this->dieUsage( 'An internal error occurred', 'internal-error', 0, $error );
 627                                 }
 628                         }
 629                         $result['result'] = 'Success';
 630                 }
 631
 632                 $result['filename'] = $file->getName();
 633                 if ( $warnings && count( $warnings ) > 0 ) {
 634                         $result['warnings'] = $warnings;
 635                 }
 636
 637                 return $result;
 638         }
 639
 640         /**
 641          * Checks if asynchronous copy uploads are enabled and throws an error if they are not.
 642          */
 643         protected function checkAsyncDownloadEnabled() {
 644                 global $wgAllowAsyncCopyUploads;
 645                 if ( !$wgAllowAsyncCopyUploads ) {
 646                         $this->dieUsage( 'Asynchronous copy uploads disabled', 'asynccopyuploaddisabled' );
 647                 }
 648         }
 649
 650         public function mustBePosted() {
 651                 return true;
 652         }
 653
 654         public function isWriteMode() {
 655                 return true;
 656         }
 657
 658         public function getAllowedParams() {
 659                 $params = array(
 660                         'filename' => array(
 661                                 ApiBase::PARAM_TYPE => 'string',
 662                         ),
 663                         'comment' => array(
 664                                 ApiBase::PARAM_DFLT => ''
 665                         ),
 666                         'text' => null,
 667                         'token' => array(
 668                                 ApiBase::PARAM_TYPE => 'string',
 669                                 ApiBase::PARAM_REQUIRED => true
 670                         ),
 671                         'watch' => array(
 672                                 ApiBase::PARAM_DFLT => false,
 673                                 ApiBase::PARAM_DEPRECATED => true,
 674                         ),
 675                         'watchlist' => array(
 676                                 ApiBase::PARAM_DFLT => 'preferences',
 677                                 ApiBase::PARAM_TYPE => array(
 678                                         'watch',
 679                                         'preferences',
 680                                         'nochange'
 681                                 ),
 682                         ),
 683                         'ignorewarnings' => false,
 684                         'file' => array(
 685                                 ApiBase::PARAM_TYPE => 'upload',
 686                         ),
 687                         'url' => null,
 688                         'filekey' => null,
 689                         'sessionkey' => array(
 690                                 ApiBase::PARAM_DFLT => null,
 691                                 ApiBase::PARAM_DEPRECATED => true,
 692                         ),
 693                         'stash' => false,
 694
 695                         'filesize' => null,
 696                         'offset' => null,
 697                         'chunk' => array(
 698                                 ApiBase::PARAM_TYPE => 'upload',
 699                         ),
 700
 701                         'async' => false,
 702                         'asyncdownload' => false,
 703                         'leavemessage' => false,
 704                         'statuskey' => null,
 705                         'checkstatus' => false,
 706                 );
 707
 708                 return $params;
 709         }
 710
 711         public function getParamDescription() {
 712                 $params = array(
 713                         'filename' => 'Target filename',
 714                         'token' => 'Edit token. You can get one of these through prop=info',
 715                         'comment' => 'Upload comment. Also used as the initial page text for new files if "text" is not specified',
 716                         'text' => 'Initial page text for new files',
 717                         'watch' => 'Watch the page',
 718                         'watchlist' => 'Unconditionally add or remove the page from your watchlist, use preferences or do not change watch',
 719                         'ignorewarnings' => 'Ignore any warnings',
 720                         'file' => 'File contents',
 721                         'url' => 'URL to fetch the file from',
 722                         'filekey' => 'Key that identifies a previous upload that was stashed temporarily.',
 723                         'sessionkey' => 'Same as filekey, maintained for backward compatibility.',
 724                         'stash' => 'If set, the server will not add the file to the repository and stash it temporarily.',
 725
 726                         'chunk' => 'Chunk contents',
 727                         'offset' => 'Offset of chunk in bytes',
 728                         'filesize' => 'Filesize of entire upload',
 729
 730                         'async' => 'Make potentially large file operations asynchronous when possible',
 731                         'asyncdownload' => 'Make fetching a URL asynchronous',
 732                         'leavemessage' => 'If asyncdownload is used, leave a message on the user talk page if finished',
 733                         'statuskey' => 'Fetch the upload status for this file key (upload by URL)',
 734                         'checkstatus' => 'Only fetch the upload status for the given file key',
 735                 );
 736
 737                 return $params;
 738
 739         }
 740
 741         public function getResultProperties() {
 742                 return array(
 743                         '' => array(
 744                                 'result' => array(
 745                                         ApiBase::PROP_TYPE => array(
 746                                                 'Success',
 747                                                 'Warning',
 748                                                 'Continue',
 749                                                 'Queued'
 750                                         ),
 751                                 ),
 752                                 'filekey' => array(
 753                                         ApiBase::PROP_TYPE => 'string',
 754                                         ApiBase::PROP_NULLABLE => true
 755                                 ),
 756                                 'sessionkey' => array(
 757                                         ApiBase::PROP_TYPE => 'string',
 758                                         ApiBase::PROP_NULLABLE => true
 759                                 ),
 760                                 'offset' => array(
 761                                         ApiBase::PROP_TYPE => 'integer',
 762                                         ApiBase::PROP_NULLABLE => true
 763                                 ),
 764                                 'statuskey' => array(
 765                                         ApiBase::PROP_TYPE => 'string',
 766                                         ApiBase::PROP_NULLABLE => true
 767                                 ),
 768                                 'filename' => array(
 769                                         ApiBase::PROP_TYPE => 'string',
 770                                         ApiBase::PROP_NULLABLE => true
 771                                 )
 772                         )
 773                 );
 774         }
 775
 776         public function getDescription() {
 777                 return array(
 778                         'Upload a file, or get the status of pending uploads. Several methods are available:',
 779                         ' * Upload file contents directly, using the "file" parameter',
 780                         ' * Have the MediaWiki server fetch a file from a URL, using the "url" parameter',
 781                         ' * Complete an earlier upload that failed due to warnings, using the "filekey" parameter',
 782                         'Note that the HTTP POST must be done as a file upload (i.e. using multipart/form-data) when',
 783                         'sending the "file". Also you must get and send an edit token before doing any upload stuff'
 784                 );
 785         }
 786
 787         public function getPossibleErrors() {
 788                 return array_merge( parent::getPossibleErrors(),
 789                         $this->getRequireOnlyOneParameterErrorMessages( array( 'filekey', 'file', 'url', 'statuskey' ) ),
 790                         array(
 791                                 array( 'uploaddisabled' ),
 792                                 array( 'invalid-file-key' ),
 793                                 array( 'uploaddisabled' ),
 794                                 array( 'mustbeloggedin', 'upload' ),
 795                                 array( 'badaccess-groups' ),
 796                                 array( 'code' => 'fetchfileerror', 'info' => '' ),
 797                                 array( 'code' => 'nomodule', 'info' => 'No upload module set' ),
 798                                 array( 'code' => 'empty-file', 'info' => 'The file you submitted was empty' ),
 799                                 array( 'code' => 'filetype-missing', 'info' => 'The file is missing an extension' ),
 800                                 array( 'code' => 'filename-tooshort', 'info' => 'The filename is too short' ),
 801                                 array( 'code' => 'overwrite', 'info' => 'Overwriting an existing file is not allowed' ),
 802                                 array( 'code' => 'stashfailed', 'info' => 'Stashing temporary file failed' ),
 803                                 array( 'code' => 'publishfailed', 'info' => 'Publishing of stashed file failed' ),
 804                                 array( 'code' => 'internal-error', 'info' => 'An internal error occurred' ),
 805                                 array( 'code' => 'asynccopyuploaddisabled', 'info' => 'Asynchronous copy uploads disabled' ),
 806                                 array( 'fileexists-forbidden' ),
 807                                 array( 'fileexists-shared-forbidden' ),
 808                         )
 809                 );
 810         }
 811
 812         public function needsToken() {
 813                 return true;
 814         }
 815
 816         public function getTokenSalt() {
 817                 return '';
 818         }
 819
 820         public function getExamples() {
 821                 return array(
 822                         'api.php?action=upload&filename=Wiki.png&url=http%3A//upload.wikimedia.org/wikipedia/en/b/bc/Wiki.png'
 823                                 => 'Upload from a URL',
 824                         'api.php?action=upload&filename=Wiki.png&filekey=filekey&ignorewarnings=1'
 825                                 => 'Complete an upload that failed due to warnings',
 826                 );
 827         }
 828
 829         public function getHelpUrls() {
 830                 return 'https://www.mediawiki.org/wiki/API:Upload';
 831         }
 832 }