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 RequestContext
  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( RequestContext $context = null ) {
  49                 if ( !$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                         // check variant links so that interwiki links don't have to worry
  82                         // about the possible different language variants
  83                         if ( count( $wgContLang->getVariants() ) > 1
  84                                 && !is_null( $ret ) && $ret->getArticleID() == 0 )
  85                         {
  86                                 $wgContLang->findVariantLink( $title, $ret );
  87                         }
  88                 }
  89                 // For non-special titles, check for implicit titles
  90                 if ( is_null( $ret ) || $ret->getNamespace() != NS_SPECIAL ) {
  91                         // We can have urls with just ?diff=,?oldid= or even just ?diff=
  92                         $oldid = $request->getInt( 'oldid' );
  93                         $oldid = $oldid ? $oldid : $request->getInt( 'diff' );
  94                         // Allow oldid to override a changed or missing title
  95                         if ( $oldid ) {
  96                                 $rev = Revision::newFromId( $oldid );
  97                                 $ret = $rev ? $rev->getTitle() : $ret;
  98                         }
  99                 }
 100
 101                 if ( $ret === null || ( $ret->getDBkey() == '' && $ret->getInterwiki() == '' ) ) {
 102                         $ret = SpecialPage::getTitleFor( 'Badtitle' );
 103                 }
 104
 105                 return $ret;
 106         }
 107
 108         /**
 109          * Get the Title object that we'll be acting on, as specified in the WebRequest
 110          * @return Title
 111          */
 112         public function getTitle(){
 113                 if( $this->context->getTitle() === null ){
 114                         $this->context->setTitle( $this->parseTitle() );
 115                 }
 116                 return $this->context->getTitle();
 117         }
 118
 119         /**
 120          * Performs the request.
 121          * - bad titles
 122          * - read restriction
 123          * - local interwiki redirects
 124          * - redirect loop
 125          * - special pages
 126          * - normal pages
 127          *
 128          * @return void
 129          */
 130         private function performRequest() {
 131                 global $wgServer, $wgUsePathInfo;
 132
 133                 wfProfileIn( __METHOD__ );
 134
 135                 $request = $this->context->getRequest();
 136                 $title = $this->context->getTitle();
 137                 $output = $this->context->getOutput();
 138                 $user = $this->context->getUser();
 139
 140                 if ( $request->getVal( 'printable' ) === 'yes' ) {
 141                         $output->setPrintable();
 142                 }
 143
 144                 $pageView = false; // was an article or special page viewed?
 145
 146                 wfRunHooks( 'BeforeInitialize',
 147                         array( &$title, null, &$output, &$user, $request, $this ) );
 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                         $this->context->title = SpecialPage::getTitleFor( 'Badtitle' );
 152                         throw new ErrorPageError( 'badtitle', 'badtitletext' );
 153                 // If the user is not logged in, the Namespace:title of the article must be in
 154                 // the Read array in order for the user to see it. (We have to check here to
 155                 // catch special pages etc. We check again in Article::view())
 156                 } elseif ( !$title->userCanRead() ) {
 157                         $output->loginToUse();
 158                 // Interwiki redirects
 159                 } elseif ( $title->getInterwiki() != '' ) {
 160                         $rdfrom = $request->getVal( 'rdfrom' );
 161                         if ( $rdfrom ) {
 162                                 $url = $title->getFullURL( 'rdfrom=' . urlencode( $rdfrom ) );
 163                         } else {
 164                                 $query = $request->getValues();
 165                                 unset( $query['title'] );
 166                                 $url = $title->getFullURL( $query );
 167                         }
 168                         // Check for a redirect loop
 169                         if ( !preg_match( '/^' . preg_quote( $wgServer, '/' ) . '/', $url )
 170                                 && $title->isLocal() )
 171                         {
 172                                 // 301 so google et al report the target as the actual url.
 173                                 $output->redirect( $url, 301 );
 174                         } else {
 175                                 $this->context->setTitle( SpecialPage::getTitleFor( 'Badtitle' ) );
 176                                 wfProfileOut( __METHOD__ );
 177                                 throw new ErrorPageError( 'badtitle', 'badtitletext' );
 178                         }
 179                 // Redirect loops, no title in URL, $wgUsePathInfo URLs, and URLs with a variant
 180                 } elseif ( $request->getVal( 'action', 'view' ) == 'view' && !$request->wasPosted()
 181                         && ( $request->getVal( 'title' ) === null ||
 182                                 $title->getPrefixedDBKey() != $request->getVal( 'title' ) )
 183                         && !count( $request->getValueNames( array( 'action', 'title' ) ) ) )
 184                 {
 185                         if ( $title->getNamespace() == NS_SPECIAL ) {
 186                                 list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $title->getDBkey() );
 187                                 if ( $name ) {
 188                                         $title = SpecialPage::getTitleFor( $name, $subpage );
 189                                 }
 190                         }
 191                         $targetUrl = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 192                         // Redirect to canonical url, make it a 301 to allow caching
 193                         if ( $targetUrl == $request->getFullRequestURL() ) {
 194                                 $message = "Redirect loop detected!\n\n" .
 195                                         "This means the wiki got confused about what page was " .
 196                                         "requested; this sometimes happens when moving a wiki " .
 197                                         "to a new server or changing the server configuration.\n\n";
 198
 199                                 if ( $wgUsePathInfo ) {
 200                                         $message .= "The wiki is trying to interpret the page " .
 201                                                 "title from the URL path portion (PATH_INFO), which " .
 202                                                 "sometimes fails depending on the web server. Try " .
 203                                                 "setting \"\$wgUsePathInfo = false;\" in your " .
 204                                                 "LocalSettings.php, or check that \$wgArticlePath " .
 205                                                 "is correct.";
 206                                 } else {
 207                                         $message .= "Your web server was detected as possibly not " .
 208                                                 "supporting URL path components (PATH_INFO) correctly; " .
 209                                                 "check your LocalSettings.php for a customized " .
 210                                                 "\$wgArticlePath setting and/or toggle \$wgUsePathInfo " .
 211                                                 "to true.";
 212                                 }
 213                                 wfHttpError( 500, "Internal error", $message );
 214                         } else {
 215                                 $output->setSquidMaxage( 1200 );
 216                                 $output->redirect( $targetUrl, '301' );
 217                         }
 218                 // Special pages
 219                 } elseif ( NS_SPECIAL == $title->getNamespace() ) {
 220                         $pageView = true;
 221                         // Actions that need to be made when we have a special pages
 222                         SpecialPageFactory::executePath( $title, $this->context );
 223                 } else {
 224                         // ...otherwise treat it as an article view. The article
 225                         // may be a redirect to another article or URL.
 226                         $article = $this->initializeArticle();
 227                         if ( is_object( $article ) ) {
 228                                 $pageView = true;
 229                                 /**
 230                                  * $wgArticle is deprecated, do not use it. This will possibly be removed
 231                                  * entirely in 1.20 or 1.21
 232                                  * @deprecated since 1.18
 233                                  */
 234                                 global $wgArticle;
 235                                 $wgArticle = $article;
 236
 237                                 $this->performAction( $article );
 238                         } elseif ( is_string( $article ) ) {
 239                                 $output->redirect( $article );
 240                         } else {
 241                                 wfProfileOut( __METHOD__ );
 242                                 throw new MWException( "Shouldn't happen: MediaWiki::initializeArticle() returned neither an object nor a URL" );
 243                         }
 244                 }
 245
 246                 if ( $pageView ) {
 247                         // Promote user to any groups they meet the criteria for
 248                         $user->addAutopromoteOnceGroups( 'onView' );
 249                 }
 250
 251                 wfProfileOut( __METHOD__ );
 252         }
 253
 254         /**
 255          * Create an Article object of the appropriate class for the given page.
 256          *
 257          * @deprecated in 1.18; use Article::newFromTitle() instead
 258          * @param $title Title
 259          * @param $context RequestContext
 260          * @return Article object
 261          */
 262         public static function articleFromTitle( $title, RequestContext $context ) {
 263                 return Article::newFromTitle( $title, $context );
 264         }
 265
 266         /**
 267          * Returns the action that will be executed, not necessarily the one passed
 268          * passed through the "action" parameter. Actions disabled in
 269          * $wgDisabledActions will be replaced by "nosuchaction"
 270          *
 271          * @return String: action
 272          */
 273         public function getAction() {
 274                 global $wgDisabledActions;
 275
 276                 $request = $this->context->getRequest();
 277                 $action = $request->getVal( 'action', 'view' );
 278
 279                 // Check for disabled actions
 280                 if ( in_array( $action, $wgDisabledActions ) ) {
 281                         return 'nosuchaction';
 282                 }
 283
 284                 // Workaround for bug #20966: inability of IE to provide an action dependent
 285                 // on which submit button is clicked.
 286                 if ( $action === 'historysubmit' ) {
 287                         if ( $request->getBool( 'revisiondelete' ) ) {
 288                                 return 'revisiondelete';
 289                         } else {
 290                                 return 'view';
 291                         }
 292                 } elseif ( $action == 'editredlink' ) {
 293                         return 'edit';
 294                 }
 295
 296                 return $action;
 297         }
 298
 299         /**
 300          * Initialize the main Article object for "standard" actions (view, etc)
 301          * Create an Article object for the page, following redirects if needed.
 302          *
 303          * @return mixed an Article, or a string to redirect to another URL
 304          */
 305         private function initializeArticle() {
 306                 global $wgDisableHardRedirects;
 307
 308                 wfProfileIn( __METHOD__ );
 309
 310                 $request = $this->context->getRequest();
 311                 $title = $this->context->getTitle();
 312
 313                 $action = $request->getVal( 'action', 'view' );
 314                 $article = Article::newFromTitle( $title, $this->context );
 315                 // NS_MEDIAWIKI has no redirects.
 316                 // It is also used for CSS/JS, so performance matters here...
 317                 if ( $title->getNamespace() == NS_MEDIAWIKI ) {
 318                         wfProfileOut( __METHOD__ );
 319                         return $article;
 320                 }
 321                 // Namespace might change when using redirects
 322                 // Check for redirects ...
 323                 $file = ( $title->getNamespace() == NS_FILE ) ? $article->getFile() : null;
 324                 if ( ( $action == 'view' || $action == 'render' )       // ... for actions that show content
 325                         && !$request->getVal( 'oldid' ) &&    // ... and are not old revisions
 326                         !$request->getVal( 'diff' ) &&    // ... and not when showing diff
 327                         $request->getVal( 'redirect' ) != 'no' &&       // ... unless explicitly told not to
 328                         // ... and the article is not a non-redirect image page with associated file
 329                         !( is_object( $file ) && $file->exists() && !$file->getRedirected() ) )
 330                 {
 331                         // Give extensions a change to ignore/handle redirects as needed
 332                         $ignoreRedirect = $target = false;
 333
 334                         wfRunHooks( 'InitializeArticleMaybeRedirect',
 335                                 array( &$title, &$request, &$ignoreRedirect, &$target, &$article ) );
 336
 337                         // Follow redirects only for... redirects.
 338                         // If $target is set, then a hook wanted to redirect.
 339                         if ( !$ignoreRedirect && ( $target || $article->isRedirect() ) ) {
 340                                 // Is the target already set by an extension?
 341                                 $target = $target ? $target : $article->followRedirect();
 342                                 if ( is_string( $target ) ) {
 343                                         if ( !$wgDisableHardRedirects ) {
 344                                                 // we'll need to redirect
 345                                                 wfProfileOut( __METHOD__ );
 346                                                 return $target;
 347                                         }
 348                                 }
 349                                 if ( is_object( $target ) ) {
 350                                         // Rewrite environment to redirected article
 351                                         $rarticle = Article::newFromTitle( $target, $this->context );
 352                                         $rarticle->loadPageData();
 353                                         if ( $rarticle->exists() || ( is_object( $file ) && !$file->isLocal() ) ) {
 354                                                 $rarticle->setRedirectedFrom( $title );
 355                                                 $article = $rarticle;
 356                                                 $this->context->setTitle( $target );
 357                                         }
 358                                 }
 359                         } else {
 360                                 $this->context->setTitle( $article->getTitle() );
 361                         }
 362                 }
 363
 364                 wfProfileOut( __METHOD__ );
 365                 return $article;
 366         }
 367
 368         /**
 369          * Cleaning up request by doing deferred updates, DB transaction, and the output
 370          */
 371         public function finalCleanup() {
 372                 wfProfileIn( __METHOD__ );
 373                 // Now commit any transactions, so that unreported errors after
 374                 // output() don't roll back the whole DB transaction
 375                 $factory = wfGetLBFactory();
 376                 $factory->commitMasterChanges();
 377                 // Output everything!
 378                 $this->context->getOutput()->output();
 379                 // Do any deferred jobs
 380                 wfDoUpdates( 'commit' );
 381                 $this->doJobs();
 382                 wfProfileOut( __METHOD__ );
 383         }
 384
 385         /**
 386          * Do a job from the job queue
 387          */
 388         private function doJobs() {
 389                 global $wgJobRunRate;
 390
 391                 if ( $wgJobRunRate <= 0 || wfReadOnly() ) {
 392                         return;
 393                 }
 394                 if ( $wgJobRunRate < 1 ) {
 395                         $max = mt_getrandmax();
 396                         if ( mt_rand( 0, $max ) > $max * $wgJobRunRate ) {
 397                                 return;
 398                         }
 399                         $n = 1;
 400                 } else {
 401                         $n = intval( $wgJobRunRate );
 402                 }
 403
 404                 while ( $n-- && false != ( $job = Job::pop() ) ) {
 405                         $output = $job->toString() . "\n";
 406                         $t = -wfTime();
 407                         $success = $job->run();
 408                         $t += wfTime();
 409                         $t = round( $t * 1000 );
 410                         if ( !$success ) {
 411                                 $output .= "Error: " . $job->getLastError() . ", Time: $t ms\n";
 412                         } else {
 413                                 $output .= "Success, Time: $t ms\n";
 414                         }
 415                         wfDebugLog( 'jobqueue', $output );
 416                 }
 417         }
 418
 419         /**
 420          * Ends this task peacefully
 421          */
 422         public function restInPeace() {
 423                 MessageCache::logMessages();
 424                 wfLogProfilingData();
 425                 // Commit and close up!
 426                 $factory = wfGetLBFactory();
 427                 $factory->commitMasterChanges();
 428                 $factory->shutdown();
 429                 wfDebug( "Request ended normally\n" );
 430         }
 431
 432         /**
 433          * Perform one of the "standard" actions
 434          *
 435          * @param $article Article
 436          */
 437         private function performAction( Page $article ) {
 438                 global $wgSquidMaxage, $wgUseExternalEditor;
 439
 440                 wfProfileIn( __METHOD__ );
 441
 442                 $request = $this->context->getRequest();
 443                 $output = $this->context->getOutput();
 444                 $title = $this->context->getTitle();
 445                 $user = $this->context->getUser();
 446
 447                 if ( !wfRunHooks( 'MediaWikiPerformAction',
 448                         array( $output, $article, $title, $user, $request, $this ) ) )
 449                 {
 450                         wfProfileOut( __METHOD__ );
 451                         return;
 452                 }
 453
 454                 $act = $this->getAction();
 455
 456                 $action = Action::factory( $act, $article );
 457                 if ( $action instanceof Action ) {
 458                         $action->show();
 459                         wfProfileOut( __METHOD__ );
 460                         return;
 461                 }
 462
 463                 switch( $act ) {
 464                         case 'view':
 465                                 $output->setSquidMaxage( $wgSquidMaxage );
 466                                 $article->view();
 467                                 break;
 468                         case 'raw': // includes JS/CSS
 469                                 wfProfileIn( __METHOD__ . '-raw' );
 470                                 $raw = new RawPage( $article );
 471                                 $raw->view();
 472                                 wfProfileOut( __METHOD__ . '-raw' );
 473                                 break;
 474                         case 'delete':
 475                         case 'protect':
 476                         case 'unprotect':
 477                         case 'render':
 478                                 $article->$act();
 479                                 break;
 480                         case 'submit':
 481                                 if ( session_id() == '' ) {
 482                                         // Send a cookie so anons get talk message notifications
 483                                         wfSetupSession();
 484                                 }
 485                                 // Continue...
 486                         case 'edit':
 487                                 if ( wfRunHooks( 'CustomEditor', array( $article, $user ) ) ) {
 488                                         $internal = $request->getVal( 'internaledit' );
 489                                         $external = $request->getVal( 'externaledit' );
 490                                         $section = $request->getVal( 'section' );
 491                                         $oldid = $request->getVal( 'oldid' );
 492                                         if ( !$wgUseExternalEditor || $act == 'submit' || $internal ||
 493                                            $section || $oldid ||
 494                                            ( !$user->getOption( 'externaleditor' ) && !$external ) )
 495                                         {
 496                                                 $editor = new EditPage( $article );
 497                                                 $editor->submit();
 498                                         } elseif ( $wgUseExternalEditor
 499                                                 && ( $external || $user->getOption( 'externaleditor' ) ) )
 500                                         {
 501                                                 $mode = $request->getVal( 'mode' );
 502                                                 $extedit = new ExternalEdit( $article->getTitle(), $mode );
 503                                                 $extedit->edit();
 504                                         }
 505                                 }
 506                                 break;
 507                         case 'history':
 508                                 if ( $request->getFullRequestURL() == $title->getInternalURL( 'action=history' ) ) {
 509                                         $output->setSquidMaxage( $wgSquidMaxage );
 510                                 }
 511                                 $history = new HistoryPage( $article );
 512                                 $history->history();
 513                                 break;
 514                         default:
 515                                 if ( wfRunHooks( 'UnknownAction', array( $act, $article ) ) ) {
 516                                         $output->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
 517                                 }
 518                 }
 519                 wfProfileOut( __METHOD__ );
 520         }
 521
 522         /**
 523          * Run the current MediaWiki instance
 524          * index.php just calls this
 525          */
 526         public function run() {
 527                 try {
 528                         $this->checkMaxLag( true );
 529                         $this->main();
 530                         $this->restInPeace();
 531                 } catch ( Exception $e ) {
 532                         MWExceptionHandler::handle( $e );
 533                 }
 534         }
 535
 536         /**
 537          * Checks if the request should abort due to a lagged server,
 538          * for given maxlag parameter.
 539          *
 540          * @param boolean $abort True if this class should abort the
 541          * script execution. False to return the result as a boolean.
 542          * @return boolean True if we passed the check, false if we surpass the maxlag
 543          */
 544         private function checkMaxLag( $abort ) {
 545                 global $wgShowHostnames;
 546
 547                 wfProfileIn( __METHOD__ );
 548                 $maxLag = $this->context->getRequest()->getVal( 'maxlag' );
 549                 if ( !is_null( $maxLag ) ) {
 550                         $lb = wfGetLB(); // foo()->bar() is not supported in PHP4
 551                         list( $host, $lag ) = $lb->getMaxLag();
 552                         if ( $lag > $maxLag ) {
 553                                 if ( $abort ) {
 554                                         $resp = $this->context->getRequest()->response();
 555                                         $resp->header( 'HTTP/1.1 503 Service Unavailable' );
 556                                         $resp->header( 'Retry-After: ' . max( intval( $maxLag ), 5 ) );
 557                                         $resp->header( 'X-Database-Lag: ' . intval( $lag ) );
 558                                         $resp->header( 'Content-Type: text/plain' );
 559                                         if( $wgShowHostnames ) {
 560                                                 echo "Waiting for $host: $lag seconds lagged\n";
 561                                         } else {
 562                                                 echo "Waiting for a database server: $lag seconds lagged\n";
 563                                         }
 564                                 }
 565
 566                                 wfProfileOut( __METHOD__ );
 567
 568                                 if ( !$abort ) {
 569                                         return false;
 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 && $wgTitle->getNamespace() != NS_SPECIAL ) {
 597                         wfProfileIn( 'main-try-filecache' );
 598                         // Raw pages should handle cache control on their own,
 599                         // even when using file cache. This reduces hits from clients.
 600                         if ( HTMLFileCache::useFileCache() ) {
 601                                 /* Try low-level file cache hit */
 602                                 $cache = new HTMLFileCache( $wgTitle, $action );
 603                                 if ( $cache->isFileCacheGood( /* Assume up to date */ ) ) {
 604                                         /* Check incoming headers to see if client has this cached */
 605                                         $timestamp = $cache->fileCacheTime();
 606                                         if ( !$this->context->getOutput()->checkLastModified( $timestamp ) ) {
 607                                                 $cache->loadFromFileCache();
 608                                         }
 609                                         # Do any stats increment/watchlist stuff
 610                                         $article = WikiPage::factory( $wgTitle );
 611                                         $article->doViewUpdates( $user );
 612                                         # Tell OutputPage that output is taken care of
 613                                         $this->context->getOutput()->disable();
 614                                         wfProfileOut( 'main-try-filecache' );
 615                                         wfProfileOut( __METHOD__ );
 616                                         return;
 617                                 }
 618                         }
 619                         wfProfileOut( 'main-try-filecache' );
 620                 }
 621
 622                 $this->performRequest();
 623                 $this->finalCleanup();
 624
 625                 wfProfileOut( __METHOD__ );
 626         }
 627 }