includes/Wiki.php

   1 <?php
   2 /**
   3  * Helper class for the index.php entry point.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * The MediaWiki class is the helper class for the index.php entry point.
  25  *
  26  * @internal documentation reviewed 15 Mar 2010
  27  */
  28 class MediaWiki {
  29
  30         /**
  31          * TODO: fold $output, etc, into this
  32          * @var IContextSource
  33          */
  34         private $context;
  35
  36         public function request( WebRequest $x = null ){
  37                 $old = $this->context->getRequest();
  38                 $this->context->setRequest( $x );
  39                 return $old;
  40         }
  41
  42         public function output( OutputPage $x = null ){
  43                 $old = $this->context->getOutput();
  44                 $this->context->setOutput( $x );
  45                 return $old;
  46         }
  47
  48         public function __construct( IContextSource $context = null ) {
  49                 if ( !$context ) {
  50                         $context = RequestContext::getMain();
  51                 }
  52
  53                 $this->context = $context;
  54                 $this->context->setTitle( $this->parseTitle() );
  55         }
  56
  57         /**
  58          * Parse the request to get the Title object
  59          *
  60          * @return Title object to be $wgTitle
  61          */
  62         private function parseTitle() {
  63                 global $wgContLang;
  64
  65                 $request = $this->context->getRequest();
  66                 $curid = $request->getInt( 'curid' );
  67                 $title = $request->getVal( 'title' );
  68
  69                 if ( $request->getCheck( 'search' ) ) {
  70                         // Compatibility with old search URLs which didn't use Special:Search
  71                         // Just check for presence here, so blank requests still
  72                         // show the search page when using ugly URLs (bug 8054).
  73                         $ret = SpecialPage::getTitleFor( 'Search' );
  74                 } elseif ( $curid ) {
  75                         // URLs like this are generated by RC, because rc_title isn't always accurate
  76                         $ret = Title::newFromID( $curid );
  77                 } elseif ( $title == '' && $this->getAction() != 'delete' ) {
  78                         $ret = Title::newMainPage();
  79                 } else {
  80                         $ret = Title::newFromURL( $title );
  81                         // Alias NS_MEDIA page URLs to NS_FILE...we only use NS_MEDIA
  82                         // in wikitext links to tell Parser to make a direct file link
  83                         if ( !is_null( $ret ) && $ret->getNamespace() == NS_MEDIA ) {
  84                                 $ret = Title::makeTitle( NS_FILE, $ret->getDBkey() );
  85                         }
  86                         // Check variant links so that interwiki links don't have to worry
  87                         // about the possible different language variants
  88                         if ( count( $wgContLang->getVariants() ) > 1
  89                                 && !is_null( $ret ) && $ret->getArticleID() == 0 )
  90                         {
  91                                 $wgContLang->findVariantLink( $title, $ret );
  92                         }
  93                 }
  94                 // For non-special titles, check for implicit titles
  95                 if ( is_null( $ret ) || !$ret->isSpecialPage() ) {
  96                         // We can have urls with just ?diff=,?oldid= or even just ?diff=
  97                         $oldid = $request->getInt( 'oldid' );
  98                         $oldid = $oldid ? $oldid : $request->getInt( 'diff' );
  99                         // Allow oldid to override a changed or missing title
 100                         if ( $oldid ) {
 101                                 $rev = Revision::newFromId( $oldid );
 102                                 $ret = $rev ? $rev->getTitle() : $ret;
 103                         }
 104                 }
 105
 106                 if ( $ret === null || ( $ret->getDBkey() == '' && $ret->getInterwiki() == '' ) ) {
 107                         $ret = SpecialPage::getTitleFor( 'Badtitle' );
 108                 }
 109
 110                 return $ret;
 111         }
 112
 113         /**
 114          * Get the Title object that we'll be acting on, as specified in the WebRequest
 115          * @return Title
 116          */
 117         public function getTitle(){
 118                 if( $this->context->getTitle() === null ){
 119                         $this->context->setTitle( $this->parseTitle() );
 120                 }
 121                 return $this->context->getTitle();
 122         }
 123
 124         /**
 125          * Performs the request.
 126          * - bad titles
 127          * - read restriction
 128          * - local interwiki redirects
 129          * - redirect loop
 130          * - special pages
 131          * - normal pages
 132          *
 133          * @return void
 134          */
 135         private function performRequest() {
 136                 global $wgServer, $wgUsePathInfo, $wgTitle;
 137
 138                 wfProfileIn( __METHOD__ );
 139
 140                 $request = $this->context->getRequest();
 141                 $title = $this->context->getTitle();
 142                 $output = $this->context->getOutput();
 143                 $user = $this->context->getUser();
 144
 145                 if ( $request->getVal( 'printable' ) === 'yes' ) {
 146                         $output->setPrintable();
 147                 }
 148
 149                 // Invalid titles. Bug 21776: The interwikis must redirect even if the page name is empty.
 150                 if ( is_null( $title ) || ( $title->getDBkey() == '' && $title->getInterwiki() == '' ) ||
 151                         $title->isSpecial( 'Badtitle' ) )
 152                 {
 153                         $this->context->setTitle( SpecialPage::getTitleFor( 'Badtitle' ) );
 154                         wfProfileOut( __METHOD__ );
 155                         throw new ErrorPageError( 'badtitle', 'badtitletext' );
 156                 }
 157
 158                 // Check user's permissions to read this page.
 159                 // We have to check here to catch special pages etc.
 160                 // We will check again in Article::view().
 161                 $permErrors = $title->getUserPermissionsErrors( 'read', $user );
 162                 if ( count( $permErrors ) ) {
 163                         // Bug 32276: allowing the skin to generate output with $wgTitle or
 164                         // $this->context->title set to the input title would allow anonymous users to
 165                         // determine whether a page exists, potentially leaking private data. In fact, the
 166                         // curid and oldid request  parameters would allow page titles to be enumerated even
 167                         // when they are not guessable. So we reset the title to Special:Badtitle before the
 168                         // permissions error is displayed.
 169                         //
 170                         // The skin mostly uses $this->context->getTitle() these days, but some extensions
 171                         // still use $wgTitle.
 172
 173                         $badTitle = SpecialPage::getTitleFor( 'Badtitle' );
 174                         $this->context->setTitle( $badTitle );
 175                         $wgTitle = $badTitle;
 176
 177                         wfProfileOut( __METHOD__ );
 178                         throw new PermissionsError( 'read', $permErrors );
 179                 }
 180
 181                 $pageView = false; // was an article or special page viewed?
 182
 183                 // Interwiki redirects
 184                 if ( $title->getInterwiki() != '' ) {
 185                         $rdfrom = $request->getVal( 'rdfrom' );
 186                         if ( $rdfrom ) {
 187                                 $url = $title->getFullURL( 'rdfrom=' . urlencode( $rdfrom ) );
 188                         } else {
 189                                 $query = $request->getValues();
 190                                 unset( $query['title'] );
 191                                 $url = $title->getFullURL( $query );
 192                         }
 193                         // Check for a redirect loop
 194                         if ( !preg_match( '/^' . preg_quote( $wgServer, '/' ) . '/', $url )
 195                                 && $title->isLocal() )
 196                         {
 197                                 // 301 so google et al report the target as the actual url.
 198                                 $output->redirect( $url, 301 );
 199                         } else {
 200                                 $this->context->setTitle( SpecialPage::getTitleFor( 'Badtitle' ) );
 201                                 wfProfileOut( __METHOD__ );
 202                                 throw new ErrorPageError( 'badtitle', 'badtitletext' );
 203                         }
 204                 // Redirect loops, no title in URL, $wgUsePathInfo URLs, and URLs with a variant
 205                 } elseif ( $request->getVal( 'action', 'view' ) == 'view' && !$request->wasPosted()
 206                         && ( $request->getVal( 'title' ) === null ||
 207                                 $title->getPrefixedDBKey() != $request->getVal( 'title' ) )
 208                         && !count( $request->getValueNames( array( 'action', 'title' ) ) )
 209                         && wfRunHooks( 'TestCanonicalRedirect', array( $request, $title, $output ) ) )
 210                 {
 211                         if ( $title->isSpecialPage() ) {
 212                                 list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 213                                 if ( $name ) {
 214                                         $title = SpecialPage::getTitleFor( $name, $subpage );
 215                                 }
 216                         }
 217                         $targetUrl = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 218                         // Redirect to canonical url, make it a 301 to allow caching
 219                         if ( $targetUrl == $request->getFullRequestURL() ) {
 220                                 $message = "Redirect loop detected!\n\n" .
 221                                         "This means the wiki got confused about what page was " .
 222                                         "requested; this sometimes happens when moving a wiki " .
 223                                         "to a new server or changing the server configuration.\n\n";
 224
 225                                 if ( $wgUsePathInfo ) {
 226                                         $message .= "The wiki is trying to interpret the page " .
 227                                                 "title from the URL path portion (PATH_INFO), which " .
 228                                                 "sometimes fails depending on the web server. Try " .
 229                                                 "setting \"\$wgUsePathInfo = false;\" in your " .
 230                                                 "LocalSettings.php, or check that \$wgArticlePath " .
 231                                                 "is correct.";
 232                                 } else {
 233                                         $message .= "Your web server was detected as possibly not " .
 234                                                 "supporting URL path components (PATH_INFO) correctly; " .
 235                                                 "check your LocalSettings.php for a customized " .
 236                                                 "\$wgArticlePath setting and/or toggle \$wgUsePathInfo " .
 237                                                 "to true.";
 238                                 }
 239                                 throw new HttpError( 500, $message );
 240                         } else {
 241                                 $output->setSquidMaxage( 1200 );
 242                                 $output->redirect( $targetUrl, '301' );
 243                         }
 244                 // Special pages
 245                 } elseif ( NS_SPECIAL == $title->getNamespace() ) {
 246                         $pageView = true;
 247                         // Actions that need to be made when we have a special pages
 248                         SpecialPageFactory::executePath( $title, $this->context );
 249                 } else {
 250                         // ...otherwise treat it as an article view. The article
 251                         // may be a redirect to another article or URL.
 252                         $article = $this->initializeArticle();
 253                         if ( is_object( $article ) ) {
 254                                 $pageView = true;
 255                                 /**
 256                                  * $wgArticle is deprecated, do not use it. This will possibly be removed
 257                                  * entirely in 1.20 or 1.21
 258                                  * @deprecated since 1.18
 259                                  */
 260                                 global $wgArticle;
 261                                 $wgArticle = $article;
 262
 263                                 $this->performAction( $article );
 264                         } elseif ( is_string( $article ) ) {
 265                                 $output->redirect( $article );
 266                         } else {
 267                                 wfProfileOut( __METHOD__ );
 268                                 throw new MWException( "Shouldn't happen: MediaWiki::initializeArticle() returned neither an object nor a URL" );
 269                         }
 270                         wfRunHooks( 'BeforeInitialize',
 271                                 array( &$title, &$article, &$output, &$user, $request, $this ) );
 272                 }
 273
 274                 if ( $pageView ) {
 275                         // Promote user to any groups they meet the criteria for
 276                         $user->addAutopromoteOnceGroups( 'onView' );
 277                 }
 278
 279                 wfProfileOut( __METHOD__ );
 280         }
 281
 282         /**
 283          * Create an Article object of the appropriate class for the given page.
 284          *
 285          * @deprecated in 1.18; use Article::newFromTitle() instead
 286          * @param $title Title
 287          * @param $context IContextSource
 288          * @return Article object
 289          */
 290         public static function articleFromTitle( $title, IContextSource $context ) {
 291                 wfDeprecated( __METHOD__, '1.18' );
 292                 return Article::newFromTitle( $title, $context );
 293         }
 294
 295         /**
 296          * Returns the action that will be executed, not necessarily the one passed
 297          * passed through the "action" parameter. Actions disabled in
 298          * $wgDisabledActions will be replaced by "nosuchaction"
 299          *
 300          * @return String: action
 301          */
 302         public function getAction() {
 303                 global $wgDisabledActions;
 304
 305                 $request = $this->context->getRequest();
 306                 $action = $request->getVal( 'action', 'view' );
 307
 308                 // Check for disabled actions
 309                 if ( in_array( $action, $wgDisabledActions ) ) {
 310                         return 'nosuchaction';
 311                 }
 312
 313                 // Workaround for bug #20966: inability of IE to provide an action dependent
 314                 // on which submit button is clicked.
 315                 if ( $action === 'historysubmit' ) {
 316                         if ( $request->getBool( 'revisiondelete' ) ) {
 317                                 return 'revisiondelete';
 318                         } else {
 319                                 return 'view';
 320                         }
 321                 } elseif ( $action == 'editredlink' ) {
 322                         return 'edit';
 323                 }
 324
 325                 return $action;
 326         }
 327
 328         /**
 329          * Initialize the main Article object for "standard" actions (view, etc)
 330          * Create an Article object for the page, following redirects if needed.
 331          *
 332          * @return mixed an Article, or a string to redirect to another URL
 333          */
 334         private function initializeArticle() {
 335                 global $wgDisableHardRedirects;
 336
 337                 wfProfileIn( __METHOD__ );
 338
 339                 $request = $this->context->getRequest();
 340                 $title = $this->context->getTitle();
 341
 342                 $action = $request->getVal( 'action', 'view' );
 343                 $article = Article::newFromTitle( $title, $this->context );
 344                 // NS_MEDIAWIKI has no redirects.
 345                 // It is also used for CSS/JS, so performance matters here...
 346                 if ( $title->getNamespace() == NS_MEDIAWIKI ) {
 347                         wfProfileOut( __METHOD__ );
 348                         return $article;
 349                 }
 350                 // Namespace might change when using redirects
 351                 // Check for redirects ...
 352                 $file = ( $title->getNamespace() == NS_FILE ) ? $article->getFile() : null;
 353                 if ( ( $action == 'view' || $action == 'render' )       // ... for actions that show content
 354                         && !$request->getVal( 'oldid' ) &&    // ... and are not old revisions
 355                         !$request->getVal( 'diff' ) &&    // ... and not when showing diff
 356                         $request->getVal( 'redirect' ) != 'no' &&       // ... unless explicitly told not to
 357                         // ... and the article is not a non-redirect image page with associated file
 358                         !( is_object( $file ) && $file->exists() && !$file->getRedirected() ) )
 359                 {
 360                         // Give extensions a change to ignore/handle redirects as needed
 361                         $ignoreRedirect = $target = false;
 362
 363                         wfRunHooks( 'InitializeArticleMaybeRedirect',
 364                                 array( &$title, &$request, &$ignoreRedirect, &$target, &$article ) );
 365
 366                         // Follow redirects only for... redirects.
 367                         // If $target is set, then a hook wanted to redirect.
 368                         if ( !$ignoreRedirect && ( $target || $article->isRedirect() ) ) {
 369                                 // Is the target already set by an extension?
 370                                 $target = $target ? $target : $article->followRedirect();
 371                                 if ( is_string( $target ) ) {
 372                                         if ( !$wgDisableHardRedirects ) {
 373                                                 // we'll need to redirect
 374                                                 wfProfileOut( __METHOD__ );
 375                                                 return $target;
 376                                         }
 377                                 }
 378                                 if ( is_object( $target ) ) {
 379                                         // Rewrite environment to redirected article
 380                                         $rarticle = Article::newFromTitle( $target, $this->context );
 381                                         $rarticle->loadPageData();
 382                                         if ( $rarticle->exists() || ( is_object( $file ) && !$file->isLocal() ) ) {
 383                                                 $rarticle->setRedirectedFrom( $title );
 384                                                 $article = $rarticle;
 385                                                 $this->context->setTitle( $target );
 386                                         }
 387                                 }
 388                         } else {
 389                                 $this->context->setTitle( $article->getTitle() );
 390                         }
 391                 }
 392
 393                 wfProfileOut( __METHOD__ );
 394                 return $article;
 395         }
 396
 397         /**
 398          * Cleaning up request by doing deferred updates, DB transaction, and the output
 399          */
 400         public function finalCleanup() {
 401                 wfProfileIn( __METHOD__ );
 402                 // Now commit any transactions, so that unreported errors after
 403                 // output() don't roll back the whole DB transaction
 404                 $factory = wfGetLBFactory();
 405                 $factory->commitMasterChanges();
 406                 // Output everything!
 407                 $this->context->getOutput()->output();
 408                 // Do any deferred jobs
 409                 DeferredUpdates::doUpdates( 'commit' );
 410                 $this->doJobs();
 411                 wfProfileOut( __METHOD__ );
 412         }
 413
 414         /**
 415          * Do a job from the job queue
 416          */
 417         private function doJobs() {
 418                 global $wgJobRunRate;
 419
 420                 if ( $wgJobRunRate <= 0 || wfReadOnly() ) {
 421                         return;
 422                 }
 423                 if ( $wgJobRunRate < 1 ) {
 424                         $max = mt_getrandmax();
 425                         if ( mt_rand( 0, $max ) > $max * $wgJobRunRate ) {
 426                                 return;
 427                         }
 428                         $n = 1;
 429                 } else {
 430                         $n = intval( $wgJobRunRate );
 431                 }
 432
 433                 while ( $n-- && false != ( $job = Job::pop() ) ) {
 434                         $output = $job->toString() . "\n";
 435                         $t = -wfTime();
 436                         $success = $job->run();
 437                         $t += wfTime();
 438                         $t = round( $t * 1000 );
 439                         if ( !$success ) {
 440                                 $output .= "Error: " . $job->getLastError() . ", Time: $t ms\n";
 441                         } else {
 442                                 $output .= "Success, Time: $t ms\n";
 443                         }
 444                         wfDebugLog( 'jobqueue', $output );
 445                 }
 446         }
 447
 448         /**
 449          * Ends this task peacefully
 450          */
 451         public function restInPeace() {
 452                 MessageCache::logMessages();
 453                 wfLogProfilingData();
 454                 // Commit and close up!
 455                 $factory = wfGetLBFactory();
 456                 $factory->commitMasterChanges();
 457                 $factory->shutdown();
 458                 wfDebug( "Request ended normally\n" );
 459         }
 460
 461         /**
 462          * Perform one of the "standard" actions
 463          *
 464          * @param $article Article
 465          */
 466         private function performAction( Page $article ) {
 467                 global $wgSquidMaxage;
 468
 469                 wfProfileIn( __METHOD__ );
 470
 471                 $request = $this->context->getRequest();
 472                 $output = $this->context->getOutput();
 473                 $title = $this->context->getTitle();
 474                 $user = $this->context->getUser();
 475
 476                 if ( !wfRunHooks( 'MediaWikiPerformAction',
 477                         array( $output, $article, $title, $user, $request, $this ) ) )
 478                 {
 479                         wfProfileOut( __METHOD__ );
 480                         return;
 481                 }
 482
 483                 $act = $this->getAction();
 484
 485                 $action = Action::factory( $act, $article );
 486                 if ( $action instanceof Action ) {
 487                         $action->show();
 488                         wfProfileOut( __METHOD__ );
 489                         return;
 490                 }
 491
 492                 switch( $act ) {
 493                         case 'view':
 494                                 $output->setSquidMaxage( $wgSquidMaxage );
 495                                 $article->view();
 496                                 break;
 497                         case 'delete':
 498                         case 'protect':
 499                         case 'unprotect':
 500                         case 'render':
 501                                 $article->$act();
 502                                 break;
 503                         case 'submit':
 504                                 if ( session_id() == '' ) {
 505                                         // Send a cookie so anons get talk message notifications
 506                                         wfSetupSession();
 507                                 }
 508                                 // Continue...
 509                         case 'edit':
 510                                 if ( wfRunHooks( 'CustomEditor', array( $article, $user ) ) ) {
 511                                         if ( ExternalEdit::useExternalEngine( $this->context, 'edit' )
 512                                                 && $act == 'edit' && !$request->getVal( 'section' )
 513                                                 && !$request->getVal( 'oldid' ) )
 514                                         {
 515                                                 $extedit = new ExternalEdit( $this->context );
 516                                                 $extedit->execute();
 517                                         } else {
 518                                                 $editor = new EditPage( $article );
 519                                                 $editor->edit();
 520                                         }
 521                                 }
 522                                 break;
 523                         default:
 524                                 if ( wfRunHooks( 'UnknownAction', array( $act, $article ) ) ) {
 525                                         $output->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
 526                                 }
 527                 }
 528                 wfProfileOut( __METHOD__ );
 529         }
 530
 531         /**
 532          * Run the current MediaWiki instance
 533          * index.php just calls this
 534          */
 535         public function run() {
 536                 try {
 537                         $this->checkMaxLag();
 538                         $this->main();
 539                         $this->restInPeace();
 540                 } catch ( Exception $e ) {
 541                         MWExceptionHandler::handle( $e );
 542                 }
 543         }
 544
 545         /**
 546          * Checks if the request should abort due to a lagged server,
 547          * for given maxlag parameter.
 548          */
 549         private function checkMaxLag() {
 550                 global $wgShowHostnames;
 551
 552                 wfProfileIn( __METHOD__ );
 553                 $maxLag = $this->context->getRequest()->getVal( 'maxlag' );
 554                 if ( !is_null( $maxLag ) ) {
 555                         list( $host, $lag ) = wfGetLB()->getMaxLag();
 556                         if ( $lag > $maxLag ) {
 557                                 $resp = $this->context->getRequest()->response();
 558                                 $resp->header( 'HTTP/1.1 503 Service Unavailable' );
 559                                 $resp->header( 'Retry-After: ' . max( intval( $maxLag ), 5 ) );
 560                                 $resp->header( 'X-Database-Lag: ' . intval( $lag ) );
 561                                 $resp->header( 'Content-Type: text/plain' );
 562                                 if( $wgShowHostnames ) {
 563                                         echo "Waiting for $host: $lag seconds lagged\n";
 564                                 } else {
 565                                         echo "Waiting for a database server: $lag seconds lagged\n";
 566                                 }
 567
 568                                 wfProfileOut( __METHOD__ );
 569
 570                                 exit;
 571                         }
 572                 }
 573                 wfProfileOut( __METHOD__ );
 574                 return true;
 575         }
 576
 577         private function main() {
 578                 global $wgUseFileCache, $wgTitle, $wgUseAjax;
 579
 580                 wfProfileIn( __METHOD__ );
 581
 582                 # Set title from request parameters
 583                 $wgTitle = $this->getTitle();
 584                 $action = $this->getAction();
 585                 $user = $this->context->getUser();
 586
 587                 # Send Ajax requests to the Ajax dispatcher.
 588                 if ( $wgUseAjax && $action == 'ajax' ) {
 589                         $dispatcher = new AjaxDispatcher();
 590                         $dispatcher->performAction();
 591                         wfProfileOut( __METHOD__ );
 592                         return;
 593                 }
 594
 595                 if ( $wgUseFileCache && $this->getTitle()->getNamespace() >= 0 ) {
 596                         wfProfileIn( 'main-try-filecache' );
 597                         if ( HTMLFileCache::useFileCache( $this->context ) ) {
 598                                 /* Try low-level file cache hit */
 599                                 $cache = HTMLFileCache::newFromTitle( $this->getTitle(), $action );
 600                                 if ( $cache->isCacheGood( /* Assume up to date */ ) ) {
 601                                         /* Check incoming headers to see if client has this cached */
 602                                         $timestamp = $cache->cacheTimestamp();
 603                                         if ( !$this->context->getOutput()->checkLastModified( $timestamp ) ) {
 604                                                 $cache->loadFromFileCache( $this->context );
 605                                         }
 606                                         # Do any stats increment/watchlist stuff
 607                                         $article = WikiPage::factory( $this->getTitle() );
 608                                         $article->doViewUpdates( $user );
 609                                         # Tell OutputPage that output is taken care of
 610                                         $this->context->getOutput()->disable();
 611                                         wfProfileOut( 'main-try-filecache' );
 612                                         wfProfileOut( __METHOD__ );
 613                                         return;
 614                                 }
 615                         }
 616                         wfProfileOut( 'main-try-filecache' );
 617                 }
 618
 619                 $this->performRequest();
 620                 $this->finalCleanup();
 621
 622                 wfProfileOut( __METHOD__ );
 623         }
 624 }