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                         $output->setPrintable();
 147                 }
 148
 149                 wfRunHooks( 'BeforeInitialize',
 150                         array( &$title, null, &$output, &$user, $request, $this ) );
 151
 152                 // Invalid titles. Bug 21776: The interwikis must redirect even if the page name is empty.
 153                 if ( is_null( $title ) || ( $title->getDBkey() == '' && $title->getInterwiki() == '' ) ||
 154                         $title->isSpecial( 'Badtitle' ) )
 155                 {
 156                         $this->context->setTitle( SpecialPage::getTitleFor( 'Badtitle' ) );
 157                         wfProfileOut( __METHOD__ );
 158                         throw new ErrorPageError( 'badtitle', 'badtitletext' );
 159                 }
 160
 161                 // Check user's permissions to read this page.
 162                 // We have to check here to catch special pages etc.
 163                 // We will check again in Article::view().
 164                 $permErrors = $title->getUserPermissionsErrors( 'read', $user );
 165                 if ( count( $permErrors ) ) {
 166                         // Bug 32276: allowing the skin to generate output with $wgTitle or
 167                         // $this->context->title set to the input title would allow anonymous users to
 168                         // determine whether a page exists, potentially leaking private data. In fact, the
 169                         // curid and oldid request  parameters would allow page titles to be enumerated even
 170                         // when they are not guessable. So we reset the title to Special:Badtitle before the
 171                         // permissions error is displayed.
 172                         //
 173                         // The skin mostly uses $this->context->getTitle() these days, but some extensions
 174                         // still use $wgTitle.
 175
 176                         $badTitle = SpecialPage::getTitleFor( 'Badtitle' );
 177                         $this->context->setTitle( $badTitle );
 178                         $wgTitle = $badTitle;
 179
 180                         wfProfileOut( __METHOD__ );
 181                         throw new PermissionsError( 'read', $permErrors );
 182                 }
 183
 184                 $pageView = false; // was an article or special page viewed?
 185
 186                 // Interwiki redirects
 187                 if ( $title->getInterwiki() != '' ) {
 188                         $rdfrom = $request->getVal( 'rdfrom' );
 189                         if ( $rdfrom ) {
 190                                 $url = $title->getFullURL( 'rdfrom=' . urlencode( $rdfrom ) );
 191                         } else {
 192                                 $query = $request->getValues();
 193                                 unset( $query['title'] );
 194                                 $url = $title->getFullURL( $query );
 195                         }
 196                         // Check for a redirect loop
 197                         if ( !preg_match( '/^' . preg_quote( $wgServer, '/' ) . '/', $url )
 198                                 && $title->isLocal() )
 199                         {
 200                                 // 301 so google et al report the target as the actual url.
 201                                 $output->redirect( $url, 301 );
 202                         } else {
 203                                 $this->context->setTitle( SpecialPage::getTitleFor( 'Badtitle' ) );
 204                                 wfProfileOut( __METHOD__ );
 205                                 throw new ErrorPageError( 'badtitle', 'badtitletext' );
 206                         }
 207                 // Redirect loops, no title in URL, $wgUsePathInfo URLs, and URLs with a variant
 208                 } elseif ( $request->getVal( 'action', 'view' ) == 'view' && !$request->wasPosted()
 209                         && ( $request->getVal( 'title' ) === null ||
 210                                 $title->getPrefixedDBKey() != $request->getVal( 'title' ) )
 211                         && !count( $request->getValueNames( array( 'action', 'title' ) ) )
 212                         && wfRunHooks( 'TestCanonicalRedirect', array( $request, $title, $output ) ) )
 213                 {
 214                         if ( $title->isSpecialPage() ) {
 215                                 list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 216                                 if ( $name ) {
 217                                         $title = SpecialPage::getTitleFor( $name, $subpage );
 218                                 }
 219                         }
 220                         $targetUrl = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 221                         // Redirect to canonical url, make it a 301 to allow caching
 222                         if ( $targetUrl == $request->getFullRequestURL() ) {
 223                                 $message = "Redirect loop detected!\n\n" .
 224                                         "This means the wiki got confused about what page was " .
 225                                         "requested; this sometimes happens when moving a wiki " .
 226                                         "to a new server or changing the server configuration.\n\n";
 227
 228                                 if ( $wgUsePathInfo ) {
 229                                         $message .= "The wiki is trying to interpret the page " .
 230                                                 "title from the URL path portion (PATH_INFO), which " .
 231                                                 "sometimes fails depending on the web server. Try " .
 232                                                 "setting \"\$wgUsePathInfo = false;\" in your " .
 233                                                 "LocalSettings.php, or check that \$wgArticlePath " .
 234                                                 "is correct.";
 235                                 } else {
 236                                         $message .= "Your web server was detected as possibly not " .
 237                                                 "supporting URL path components (PATH_INFO) correctly; " .
 238                                                 "check your LocalSettings.php for a customized " .
 239                                                 "\$wgArticlePath setting and/or toggle \$wgUsePathInfo " .
 240                                                 "to true.";
 241                                 }
 242                                 throw new HttpError( 500, $message );
 243                         } else {
 244                                 $output->setSquidMaxage( 1200 );
 245                                 $output->redirect( $targetUrl, '301' );
 246                         }
 247                 // Special pages
 248                 } elseif ( NS_SPECIAL == $title->getNamespace() ) {
 249                         $pageView = true;
 250                         // Actions that need to be made when we have a special pages
 251                         SpecialPageFactory::executePath( $title, $this->context );
 252                 } else {
 253                         // ...otherwise treat it as an article view. The article
 254                         // may be a redirect to another article or URL.
 255                         $article = $this->initializeArticle();
 256                         if ( is_object( $article ) ) {
 257                                 $pageView = true;
 258                                 /**
 259                                  * $wgArticle is deprecated, do not use it. This will possibly be removed
 260                                  * entirely in 1.20 or 1.21
 261                                  * @deprecated since 1.18
 262                                  */
 263                                 global $wgArticle;
 264                                 $wgArticle = $article;
 265
 266                                 $this->performAction( $article );
 267                         } elseif ( is_string( $article ) ) {
 268                                 $output->redirect( $article );
 269                         } else {
 270                                 wfProfileOut( __METHOD__ );
 271                                 throw new MWException( "Shouldn't happen: MediaWiki::initializeArticle() returned neither an object nor a URL" );
 272                         }
 273                 }
 274
 275                 if ( $pageView ) {
 276                         // Promote user to any groups they meet the criteria for
 277                         $user->addAutopromoteOnceGroups( 'onView' );
 278                 }
 279
 280                 wfProfileOut( __METHOD__ );
 281         }
 282
 283         /**
 284          * Create an Article object of the appropriate class for the given page.
 285          *
 286          * @deprecated in 1.18; use Article::newFromTitle() instead
 287          * @param $title Title
 288          * @param $context IContextSource
 289          * @return Article object
 290          */
 291         public static function articleFromTitle( $title, IContextSource $context ) {
 292                 wfDeprecated( __METHOD__, '1.18' );
 293                 return Article::newFromTitle( $title, $context );
 294         }
 295
 296         /**
 297          * Returns the action that will be executed, not necessarily the one passed
 298          * passed through the "action" parameter. Actions disabled in
 299          * $wgDisabledActions will be replaced by "nosuchaction"
 300          *
 301          * @return String: action
 302          */
 303         public function getAction() {
 304                 global $wgDisabledActions;
 305
 306                 $request = $this->context->getRequest();
 307                 $action = $request->getVal( 'action', 'view' );
 308
 309                 // Check for disabled actions
 310                 if ( in_array( $action, $wgDisabledActions ) ) {
 311                         return 'nosuchaction';
 312                 }
 313
 314                 // Workaround for bug #20966: inability of IE to provide an action dependent
 315                 // on which submit button is clicked.
 316                 if ( $action === 'historysubmit' ) {
 317                         if ( $request->getBool( 'revisiondelete' ) ) {
 318                                 return 'revisiondelete';
 319                         } else {
 320                                 return 'view';
 321                         }
 322                 } elseif ( $action == 'editredlink' ) {
 323                         return 'edit';
 324                 }
 325
 326                 return $action;
 327         }
 328
 329         /**
 330          * Initialize the main Article object for "standard" actions (view, etc)
 331          * Create an Article object for the page, following redirects if needed.
 332          *
 333          * @return mixed an Article, or a string to redirect to another URL
 334          */
 335         private function initializeArticle() {
 336                 global $wgDisableHardRedirects;
 337
 338                 wfProfileIn( __METHOD__ );
 339
 340                 $request = $this->context->getRequest();
 341                 $title = $this->context->getTitle();
 342
 343                 $action = $request->getVal( 'action', 'view' );
 344                 $article = Article::newFromTitle( $title, $this->context );
 345                 // NS_MEDIAWIKI has no redirects.
 346                 // It is also used for CSS/JS, so performance matters here...
 347                 if ( $title->getNamespace() == NS_MEDIAWIKI ) {
 348                         wfProfileOut( __METHOD__ );
 349                         return $article;
 350                 }
 351                 // Namespace might change when using redirects
 352                 // Check for redirects ...
 353                 $file = ( $title->getNamespace() == NS_FILE ) ? $article->getFile() : null;
 354                 if ( ( $action == 'view' || $action == 'render' )       // ... for actions that show content
 355                         && !$request->getVal( 'oldid' ) &&    // ... and are not old revisions
 356                         !$request->getVal( 'diff' ) &&    // ... and not when showing diff
 357                         $request->getVal( 'redirect' ) != 'no' &&       // ... unless explicitly told not to
 358                         // ... and the article is not a non-redirect image page with associated file
 359                         !( is_object( $file ) && $file->exists() && !$file->getRedirected() ) )
 360                 {
 361                         // Give extensions a change to ignore/handle redirects as needed
 362                         $ignoreRedirect = $target = false;
 363
 364                         wfRunHooks( 'InitializeArticleMaybeRedirect',
 365                                 array( &$title, &$request, &$ignoreRedirect, &$target, &$article ) );
 366
 367                         // Follow redirects only for... redirects.
 368                         // If $target is set, then a hook wanted to redirect.
 369                         if ( !$ignoreRedirect && ( $target || $article->isRedirect() ) ) {
 370                                 // Is the target already set by an extension?
 371                                 $target = $target ? $target : $article->followRedirect();
 372                                 if ( is_string( $target ) ) {
 373                                         if ( !$wgDisableHardRedirects ) {
 374                                                 // we'll need to redirect
 375                                                 wfProfileOut( __METHOD__ );
 376                                                 return $target;
 377                                         }
 378                                 }
 379                                 if ( is_object( $target ) ) {
 380                                         // Rewrite environment to redirected article
 381                                         $rarticle = Article::newFromTitle( $target, $this->context );
 382                                         $rarticle->loadPageData();
 383                                         if ( $rarticle->exists() || ( is_object( $file ) && !$file->isLocal() ) ) {
 384                                                 $rarticle->setRedirectedFrom( $title );
 385                                                 $article = $rarticle;
 386                                                 $this->context->setTitle( $target );
 387                                         }
 388                                 }
 389                         } else {
 390                                 $this->context->setTitle( $article->getTitle() );
 391                         }
 392                 }
 393
 394                 wfProfileOut( __METHOD__ );
 395                 return $article;
 396         }
 397
 398         /**
 399          * Cleaning up request by doing deferred updates, DB transaction, and the output
 400          */
 401         public function finalCleanup() {
 402                 wfProfileIn( __METHOD__ );
 403                 // Now commit any transactions, so that unreported errors after
 404                 // output() don't roll back the whole DB transaction
 405                 $factory = wfGetLBFactory();
 406                 $factory->commitMasterChanges();
 407                 // Output everything!
 408                 $this->context->getOutput()->output();
 409                 // Do any deferred jobs
 410                 DeferredUpdates::doUpdates( 'commit' );
 411                 $this->doJobs();
 412                 wfProfileOut( __METHOD__ );
 413         }
 414
 415         /**
 416          * Do a job from the job queue
 417          */
 418         private function doJobs() {
 419                 global $wgJobRunRate;
 420
 421                 if ( $wgJobRunRate <= 0 || wfReadOnly() ) {
 422                         return;
 423                 }
 424                 if ( $wgJobRunRate < 1 ) {
 425                         $max = mt_getrandmax();
 426                         if ( mt_rand( 0, $max ) > $max * $wgJobRunRate ) {
 427                                 return;
 428                         }
 429                         $n = 1;
 430                 } else {
 431                         $n = intval( $wgJobRunRate );
 432                 }
 433
 434                 while ( $n-- && false != ( $job = Job::pop() ) ) {
 435                         $output = $job->toString() . "\n";
 436                         $t = -wfTime();
 437                         $success = $job->run();
 438                         $t += wfTime();
 439                         $t = round( $t * 1000 );
 440                         if ( !$success ) {
 441                                 $output .= "Error: " . $job->getLastError() . ", Time: $t ms\n";
 442                         } else {
 443                                 $output .= "Success, Time: $t ms\n";
 444                         }
 445                         wfDebugLog( 'jobqueue', $output );
 446                 }
 447         }
 448
 449         /**
 450          * Ends this task peacefully
 451          */
 452         public function restInPeace() {
 453                 MessageCache::logMessages();
 454                 wfLogProfilingData();
 455                 // Commit and close up!
 456                 $factory = wfGetLBFactory();
 457                 $factory->commitMasterChanges();
 458                 $factory->shutdown();
 459                 wfDebug( "Request ended normally\n" );
 460         }
 461
 462         /**
 463          * Perform one of the "standard" actions
 464          *
 465          * @param $article Article
 466          */
 467         private function performAction( Page $article ) {
 468                 global $wgSquidMaxage;
 469
 470                 wfProfileIn( __METHOD__ );
 471
 472                 $request = $this->context->getRequest();
 473                 $output = $this->context->getOutput();
 474                 $title = $this->context->getTitle();
 475                 $user = $this->context->getUser();
 476
 477                 if ( !wfRunHooks( 'MediaWikiPerformAction',
 478                         array( $output, $article, $title, $user, $request, $this ) ) )
 479                 {
 480                         wfProfileOut( __METHOD__ );
 481                         return;
 482                 }
 483
 484                 $act = $this->getAction();
 485
 486                 $action = Action::factory( $act, $article );
 487                 if ( $action instanceof Action ) {
 488                         $action->show();
 489                         wfProfileOut( __METHOD__ );
 490                         return;
 491                 }
 492
 493                 switch( $act ) {
 494                         case 'view':
 495                                 $output->setSquidMaxage( $wgSquidMaxage );
 496                                 $article->view();
 497                                 break;
 498                         case 'delete':
 499                         case 'protect':
 500                         case 'unprotect':
 501                         case 'render':
 502                                 $article->$act();
 503                                 break;
 504                         case 'submit':
 505                                 if ( session_id() == '' ) {
 506                                         // Send a cookie so anons get talk message notifications
 507                                         wfSetupSession();
 508                                 }
 509                                 // Continue...
 510                         case 'edit':
 511                                 if ( wfRunHooks( 'CustomEditor', array( $article, $user ) ) ) {
 512                                         if ( ExternalEdit::useExternalEngine( $this->context, 'edit' )
 513                                                 && $act == 'edit' && !$request->getVal( 'section' )
 514                                                 && !$request->getVal( 'oldid' ) )
 515                                         {
 516                                                 $extedit = new ExternalEdit( $this->context );
 517                                                 $extedit->execute();
 518                                         } else {
 519                                                 $editor = new EditPage( $article );
 520                                                 $editor->edit();
 521                                         }
 522                                 }
 523                                 break;
 524                         default:
 525                                 if ( wfRunHooks( 'UnknownAction', array( $act, $article ) ) ) {
 526                                         $output->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
 527                                 }
 528                 }
 529                 wfProfileOut( __METHOD__ );
 530         }
 531
 532         /**
 533          * Run the current MediaWiki instance
 534          * index.php just calls this
 535          */
 536         public function run() {
 537                 try {
 538                         $this->checkMaxLag();
 539                         $this->main();
 540                         $this->restInPeace();
 541                 } catch ( Exception $e ) {
 542                         MWExceptionHandler::handle( $e );
 543                 }
 544         }
 545
 546         /**
 547          * Checks if the request should abort due to a lagged server,
 548          * for given maxlag parameter.
 549          */
 550         private function checkMaxLag() {
 551                 global $wgShowHostnames;
 552
 553                 wfProfileIn( __METHOD__ );
 554                 $maxLag = $this->context->getRequest()->getVal( 'maxlag' );
 555                 if ( !is_null( $maxLag ) ) {
 556                         list( $host, $lag ) = wfGetLB()->getMaxLag();
 557                         if ( $lag > $maxLag ) {
 558                                 $resp = $this->context->getRequest()->response();
 559                                 $resp->header( 'HTTP/1.1 503 Service Unavailable' );
 560                                 $resp->header( 'Retry-After: ' . max( intval( $maxLag ), 5 ) );
 561                                 $resp->header( 'X-Database-Lag: ' . intval( $lag ) );
 562                                 $resp->header( 'Content-Type: text/plain' );
 563                                 if( $wgShowHostnames ) {
 564                                         echo "Waiting for $host: $lag seconds lagged\n";
 565                                 } else {
 566                                         echo "Waiting for a database server: $lag seconds lagged\n";
 567                                 }
 568
 569                                 wfProfileOut( __METHOD__ );
 570
 571                                 exit;
 572                         }
 573                 }
 574                 wfProfileOut( __METHOD__ );
 575                 return true;
 576         }
 577
 578         private function main() {
 579                 global $wgUseFileCache, $wgTitle, $wgUseAjax;
 580
 581                 wfProfileIn( __METHOD__ );
 582
 583                 # Set title from request parameters
 584                 $wgTitle = $this->getTitle();
 585                 $action = $this->getAction();
 586                 $user = $this->context->getUser();
 587
 588                 # Send Ajax requests to the Ajax dispatcher.
 589                 if ( $wgUseAjax && $action == 'ajax' ) {
 590                         $dispatcher = new AjaxDispatcher();
 591                         $dispatcher->performAction();
 592                         wfProfileOut( __METHOD__ );
 593                         return;
 594                 }
 595
 596                 if ( $wgUseFileCache && $this->getTitle()->getNamespace() >= 0 ) {
 597                         wfProfileIn( 'main-try-filecache' );
 598                         if ( HTMLFileCache::useFileCache( $this->context ) ) {
 599                                 /* Try low-level file cache hit */
 600                                 $cache = HTMLFileCache::newFromTitle( $this->getTitle(), $action );
 601                                 if ( $cache->isCacheGood( /* Assume up to date */ ) ) {
 602                                         /* Check incoming headers to see if client has this cached */
 603                                         $timestamp = $cache->cacheTimestamp();
 604                                         if ( !$this->context->getOutput()->checkLastModified( $timestamp ) ) {
 605                                                 $cache->loadFromFileCache( $this->context );
 606                                         }
 607                                         # Do any stats increment/watchlist stuff
 608                                         $article = WikiPage::factory( $this->getTitle() );
 609                                         $article->doViewUpdates( $user );
 610                                         # Tell OutputPage that output is taken care of
 611                                         $this->context->getOutput()->disable();
 612                                         wfProfileOut( 'main-try-filecache' );
 613                                         wfProfileOut( __METHOD__ );
 614                                         return;
 615                                 }
 616                         }
 617                         wfProfileOut( 'main-try-filecache' );
 618                 }
 619
 620                 $this->performRequest();
 621                 $this->finalCleanup();
 622
 623                 wfProfileOut( __METHOD__ );
 624         }
 625 }