includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( 1 );
   4 /**
   5  */
   6
   7 /**
   8  * @todo document
   9  */
  10 class OutputPage {
  11         var $mMetatags, $mKeywords;
  12         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  13         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  14         var $mSubtitle, $mRedirect, $mStatusCode;
  15         var $mLastModified, $mETag, $mCategoryLinks;
  16         var $mScripts, $mLinkColours, $mPageLinkTitle;
  17
  18         var $mAllowUserJs;
  19         var $mSuppressQuickbar;
  20         var $mOnloadHandler;
  21         var $mDoNothing;
  22         var $mContainsOldMagic, $mContainsNewMagic;
  23         var $mIsArticleRelated;
  24         protected $mParserOptions; // lazy initialised, use parserOptions()
  25         var $mShowFeedLinks = false;
  26         var $mFeedLinksAppendQuery = false;
  27         var $mEnableClientCache = true;
  28         var $mArticleBodyOnly = false;
  29
  30         var $mNewSectionLink = false;
  31         var $mNoGallery = false;
  32         var $mPageTitleActionText = '';
  33         var $mParseWarnings = array();
  34
  35         /**
  36          * Constructor
  37          * Initialise private variables
  38          */
  39         function __construct() {
  40                 global $wgAllowUserJs;
  41                 $this->mAllowUserJs = $wgAllowUserJs;
  42                 $this->mMetatags = $this->mKeywords = $this->mLinktags = array();
  43                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  44                 $this->mRedirect = $this->mLastModified =
  45                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  46                 $this->mOnloadHandler = $this->mPageLinkTitle = '';
  47                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  48                 $this->mSuppressQuickbar = $this->mPrintable = false;
  49                 $this->mLanguageLinks = array();
  50                 $this->mCategoryLinks = array();
  51                 $this->mDoNothing = false;
  52                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  53                 $this->mParserOptions = null;
  54                 $this->mSquidMaxage = 0;
  55                 $this->mScripts = '';
  56                 $this->mHeadItems = array();
  57                 $this->mETag = false;
  58                 $this->mRevisionId = null;
  59                 $this->mNewSectionLink = false;
  60                 $this->mTemplateIds = array();
  61         }
  62
  63         public function redirect( $url, $responsecode = '302' ) {
  64                 # Strip newlines as a paranoia check for header injection in PHP<5.1.2
  65                 $this->mRedirect = str_replace( "\n", '', $url );
  66                 $this->mRedirectCode = $responsecode;
  67         }
  68
  69         public function getRedirect() {
  70                 return $this->mRedirect;
  71         }
  72
  73         /**
  74          * Set the HTTP status code to send with the output.
  75          *
  76          * @param int $statusCode
  77          * @return nothing
  78          */
  79         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  80
  81         # To add an http-equiv meta tag, precede the name with "http:"
  82         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  83         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  84         function addScript( $script ) { $this->mScripts .= "\t\t".$script; }
  85         function addStyle( $style ) {
  86                 global $wgStylePath, $wgStyleVersion;
  87                 $this->addLink(
  88                                 array(
  89                                         'rel' => 'stylesheet',
  90                                         'href' => $wgStylePath . '/' . $style . '?' . $wgStyleVersion ) );
  91         }
  92
  93         /**
  94          * Add a self-contained script tag with the given contents
  95          * @param string $script JavaScript text, no <script> tags
  96          */
  97         function addInlineScript( $script ) {
  98                 global $wgJsMimeType;
  99                 $this->mScripts .= "<script type=\"$wgJsMimeType\">/*<![CDATA[*/\n$script\n/*]]>*/</script>";
 100         }
 101
 102         function getScript() {
 103                 return $this->mScripts . $this->getHeadItems();
 104         }
 105
 106         function getHeadItems() {
 107                 $s = '';
 108                 foreach ( $this->mHeadItems as $item ) {
 109                         $s .= $item;
 110                 }
 111                 return $s;
 112         }
 113
 114         function addHeadItem( $name, $value ) {
 115                 $this->mHeadItems[$name] = $value;
 116         }
 117
 118         function hasHeadItem( $name ) {
 119                 return isset( $this->mHeadItems[$name] );
 120         }
 121
 122         function setETag($tag) { $this->mETag = $tag; }
 123         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
 124         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
 125
 126         function addLink( $linkarr ) {
 127                 # $linkarr should be an associative array of attributes. We'll escape on output.
 128                 array_push( $this->mLinktags, $linkarr );
 129         }
 130
 131         function addMetadataLink( $linkarr ) {
 132                 # note: buggy CC software only reads first "meta" link
 133                 static $haveMeta = false;
 134                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
 135                 $this->addLink( $linkarr );
 136                 $haveMeta = true;
 137         }
 138
 139         /**
 140          * checkLastModified tells the client to use the client-cached page if
 141          * possible. If sucessful, the OutputPage is disabled so that
 142          * any future call to OutputPage->output() have no effect.
 143          *
 144          * @return bool True iff cache-ok headers was sent.
 145          */
 146         function checkLastModified ( $timestamp ) {
 147                 global $wgCachePages, $wgCacheEpoch, $wgUser, $wgRequest;
 148                 $fname = 'OutputPage::checkLastModified';
 149
 150                 if ( !$timestamp || $timestamp == '19700101000000' ) {
 151                         wfDebug( "$fname: CACHE DISABLED, NO TIMESTAMP\n" );
 152                         return;
 153                 }
 154                 if( !$wgCachePages ) {
 155                         wfDebug( "$fname: CACHE DISABLED\n", false );
 156                         return;
 157                 }
 158                 if( $wgUser->getOption( 'nocache' ) ) {
 159                         wfDebug( "$fname: USER DISABLED CACHE\n", false );
 160                         return;
 161                 }
 162
 163                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 164                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 165
 166                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 167                         # IE sends sizes after the date like this:
 168                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 169                         # this breaks strtotime().
 170                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 171
 172                         wfSuppressWarnings(); // E_STRICT system time bitching
 173                         $modsinceTime = strtotime( $modsince );
 174                         wfRestoreWarnings();
 175
 176                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 177                         wfDebug( "$fname: -- client send If-Modified-Since: " . $modsince . "\n", false );
 178                         wfDebug( "$fname: --  we might send Last-Modified : $lastmod\n", false );
 179                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 180                                 # Make sure you're in a place you can leave when you call us!
 181                                 $wgRequest->response()->header( "HTTP/1.0 304 Not Modified" );
 182                                 $this->mLastModified = $lastmod;
 183                                 $this->sendCacheControl();
 184                                 wfDebug( "$fname: CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 185                                 $this->disable();
 186
 187                                 // Don't output a compressed blob when using ob_gzhandler;
 188                                 // it's technically against HTTP spec and seems to confuse
 189                                 // Firefox when the response gets split over two packets.
 190                                 wfClearOutputBuffers();
 191
 192                                 return true;
 193                         } else {
 194                                 wfDebug( "$fname: READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 195                                 $this->mLastModified = $lastmod;
 196                         }
 197                 } else {
 198                         wfDebug( "$fname: client did not send If-Modified-Since header\n", false );
 199                         $this->mLastModified = $lastmod;
 200                 }
 201         }
 202
 203         function setPageTitleActionText( $text ) {
 204                 $this->mPageTitleActionText = $text;
 205         }
 206
 207         function getPageTitleActionText () {
 208                 if ( isset( $this->mPageTitleActionText ) ) {
 209                         return $this->mPageTitleActionText;
 210                 }
 211         }
 212
 213         public function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 214         public function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 215         public function setPageTitle( $name ) {
 216                 global $action, $wgContLang;
 217                 $name = $wgContLang->convert($name, true);
 218                 $this->mPagetitle = $name;
 219                 if(!empty($action)) {
 220                         $taction =  $this->getPageTitleActionText();
 221                         if( !empty( $taction ) ) {
 222                                 $name .= ' - '.$taction;
 223                         }
 224                 }
 225
 226                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 227         }
 228         public function getHTMLTitle() { return $this->mHTMLtitle; }
 229         public function getPageTitle() { return $this->mPagetitle; }
 230         public function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 231         public function getSubtitle() { return $this->mSubtitle; }
 232         public function isArticle() { return $this->mIsarticle; }
 233         public function setPrintable() { $this->mPrintable = true; }
 234         public function isPrintable() { return $this->mPrintable; }
 235         public function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 236         public function isSyndicated() { return $this->mShowFeedLinks; }
 237         public function setFeedAppendQuery( $val ) { $this->mFeedLinksAppendQuery = $val; }
 238         public function getFeedAppendQuery() { return $this->mFeedLinksAppendQuery; }
 239         public function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 240         public function getOnloadHandler() { return $this->mOnloadHandler; }
 241         public function disable() { $this->mDoNothing = true; }
 242
 243         public function setArticleRelated( $v ) {
 244                 $this->mIsArticleRelated = $v;
 245                 if ( !$v ) {
 246                         $this->mIsarticle = false;
 247                 }
 248         }
 249         public function setArticleFlag( $v ) {
 250                 $this->mIsarticle = $v;
 251                 if ( $v ) {
 252                         $this->mIsArticleRelated = $v;
 253                 }
 254         }
 255
 256         public function isArticleRelated() { return $this->mIsArticleRelated; }
 257
 258         public function getLanguageLinks() { return $this->mLanguageLinks; }
 259         public function addLanguageLinks($newLinkArray) {
 260                 $this->mLanguageLinks += $newLinkArray;
 261         }
 262         public function setLanguageLinks($newLinkArray) {
 263                 $this->mLanguageLinks = $newLinkArray;
 264         }
 265
 266         public function getCategoryLinks() {
 267                 return $this->mCategoryLinks;
 268         }
 269
 270         /**
 271          * Add an array of categories, with names in the keys
 272          */
 273         public function addCategoryLinks($categories) {
 274                 global $wgUser, $wgContLang;
 275
 276                 if ( !is_array( $categories ) ) {
 277                         return;
 278                 }
 279                 # Add the links to the link cache in a batch
 280                 $arr = array( NS_CATEGORY => $categories );
 281                 $lb = new LinkBatch;
 282                 $lb->setArray( $arr );
 283                 $lb->execute();
 284
 285                 $sk = $wgUser->getSkin();
 286                 foreach ( $categories as $category => $unused ) {
 287                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 288                         $text = $wgContLang->convertHtml( $title->getText() );
 289                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 290                 }
 291         }
 292
 293         public function setCategoryLinks($categories) {
 294                 $this->mCategoryLinks = array();
 295                 $this->addCategoryLinks($categories);
 296         }
 297
 298         public function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 299         public function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 300
 301         public function disallowUserJs() { $this->mAllowUserJs = false; }
 302         public function isUserJsAllowed() { return $this->mAllowUserJs; }
 303
 304         public function addHTML( $text ) { $this->mBodytext .= $text; }
 305         public function clearHTML() { $this->mBodytext = ''; }
 306         public function getHTML() { return $this->mBodytext; }
 307         public function debug( $text ) { $this->mDebugtext .= $text; }
 308
 309         /* @deprecated */
 310         public function setParserOptions( $options ) {
 311                 return $this->parserOptions( $options );
 312         }
 313
 314         public function parserOptions( $options = null ) {
 315                 if ( !$this->mParserOptions ) {
 316                         $this->mParserOptions = new ParserOptions;
 317                 }
 318                 return wfSetVar( $this->mParserOptions, $options );
 319         }
 320
 321         /**
 322          * Set the revision ID which will be seen by the wiki text parser
 323          * for things such as embedded {{REVISIONID}} variable use.
 324          * @param mixed $revid an integer, or NULL
 325          * @return mixed previous value
 326          */
 327         public function setRevisionId( $revid ) {
 328                 $val = is_null( $revid ) ? null : intval( $revid );
 329                 return wfSetVar( $this->mRevisionId, $val );
 330         }
 331
 332         /**
 333          * Convert wikitext to HTML and add it to the buffer
 334          * Default assumes that the current page title will
 335          * be used.
 336          *
 337          * @param string $text
 338          * @param bool   $linestart
 339          */
 340         public function addWikiText( $text, $linestart = true ) {
 341                 global $wgTitle;
 342                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 343         }
 344
 345         public function addWikiTextWithTitle($text, &$title, $linestart = true) {
 346                 $this->addWikiTextTitle($text, $title, $linestart);
 347         }
 348
 349         function addWikiTextTitleTidy($text, &$title, $linestart = true) {
 350                 $this->addWikiTextTitle( $text, $title, $linestart, true );
 351         }
 352
 353         public function addWikiTextTitle($text, &$title, $linestart, $tidy = false) {
 354                 global $wgParser;
 355
 356                 $fname = 'OutputPage:addWikiTextTitle';
 357                 wfProfileIn($fname);
 358
 359                 wfIncrStats('pcache_not_possible');
 360
 361                 $popts = $this->parserOptions();
 362                 $oldTidy = $popts->setTidy($tidy);
 363
 364                 $parserOutput = $wgParser->parse( $text, $title, $popts,
 365                         $linestart, true, $this->mRevisionId );
 366
 367                 $popts->setTidy( $oldTidy );
 368
 369                 $this->addParserOutput( $parserOutput );
 370
 371                 wfProfileOut($fname);
 372         }
 373
 374         /**
 375          * @todo document
 376          * @param ParserOutput object &$parserOutput
 377          */
 378         public function addParserOutputNoText( &$parserOutput ) {
 379                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 380                 $this->addCategoryLinks( $parserOutput->getCategories() );
 381                 $this->mNewSectionLink = $parserOutput->getNewSection();
 382                 $this->addKeywords( $parserOutput );
 383                 $this->mParseWarnings = $parserOutput->getWarnings();
 384                 if ( $parserOutput->getCacheTime() == -1 ) {
 385                         $this->enableClientCache( false );
 386                 }
 387                 $this->mNoGallery = $parserOutput->getNoGallery();
 388                 $this->mHeadItems = array_merge( $this->mHeadItems, (array)$parserOutput->mHeadItems );
 389                 // Versioning...
 390                 $this->mTemplateIds += (array)$parserOutput->mTemplateIds;
 391
 392                 # Display title
 393                 if( ( $dt = $parserOutput->getDisplayTitle() ) !== false )
 394                         $this->setPageTitle( $dt );
 395
 396                 # Hooks registered in the object
 397                 global $wgParserOutputHooks;
 398                 foreach ( $parserOutput->getOutputHooks() as $hookInfo ) {
 399                         list( $hookName, $data ) = $hookInfo;
 400                         if ( isset( $wgParserOutputHooks[$hookName] ) ) {
 401                                 call_user_func( $wgParserOutputHooks[$hookName], $this, $parserOutput, $data );
 402                         }
 403                 }
 404
 405                 wfRunHooks( 'OutputPageParserOutput', array( &$this, $parserOutput ) );
 406         }
 407
 408         /**
 409          * @todo document
 410          * @param ParserOutput &$parserOutput
 411          */
 412         function addParserOutput( &$parserOutput ) {
 413                 $this->addParserOutputNoText( $parserOutput );
 414                 $text = $parserOutput->getText();
 415                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 416                 $this->addHTML( $text );
 417         }
 418
 419         /**
 420          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 421          * Saves the text into the parser cache if possible.
 422          *
 423          * @param string  $text
 424          * @param Article $article
 425          * @param bool    $cache
 426          * @deprecated Use Article::outputWikitext
 427          */
 428         public function addPrimaryWikiText( $text, $article, $cache = true ) {
 429                 global $wgParser, $wgUser;
 430
 431                 $popts = $this->parserOptions();
 432                 $popts->setTidy(true);
 433                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 434                         $popts, true, true, $this->mRevisionId );
 435                 $popts->setTidy(false);
 436                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 437                         $parserCache =& ParserCache::singleton();
 438                         $parserCache->save( $parserOutput, $article, $wgUser );
 439                 }
 440
 441                 $this->addParserOutput( $parserOutput );
 442         }
 443
 444         /**
 445          * @deprecated use addWikiTextTidy()
 446          */
 447         public function addSecondaryWikiText( $text, $linestart = true ) {
 448                 global $wgTitle;
 449                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 450         }
 451
 452         /**
 453          * Add wikitext with tidy enabled
 454          */
 455         public function addWikiTextTidy(  $text, $linestart = true ) {
 456                 global $wgTitle;
 457                 $this->addWikiTextTitleTidy($text, $wgTitle, $linestart);
 458         }
 459
 460
 461         /**
 462          * Add the output of a QuickTemplate to the output buffer
 463          *
 464          * @param QuickTemplate $template
 465          */
 466         public function addTemplate( &$template ) {
 467                 ob_start();
 468                 $template->execute();
 469                 $this->addHTML( ob_get_contents() );
 470                 ob_end_clean();
 471         }
 472
 473         /**
 474          * Parse wikitext and return the HTML.
 475          *
 476          * @param string $text
 477          * @param bool   $linestart Is this the start of a line?
 478          * @param bool   $interface ??
 479          */
 480         public function parse( $text, $linestart = true, $interface = false ) {
 481                 global $wgParser, $wgTitle;
 482                 $popts = $this->parserOptions();
 483                 if ( $interface) { $popts->setInterfaceMessage(true); }
 484                 $parserOutput = $wgParser->parse( $text, $wgTitle, $popts,
 485                         $linestart, true, $this->mRevisionId );
 486                 if ( $interface) { $popts->setInterfaceMessage(false); }
 487                 return $parserOutput->getText();
 488         }
 489
 490         /**
 491          * @param Article $article
 492          * @param User    $user
 493          *
 494          * @return bool True if successful, else false.
 495          */
 496         public function tryParserCache( &$article, $user ) {
 497                 $parserCache =& ParserCache::singleton();
 498                 $parserOutput = $parserCache->get( $article, $user );
 499                 if ( $parserOutput !== false ) {
 500                         $this->addParserOutput( $parserOutput );
 501                         return true;
 502                 } else {
 503                         return false;
 504                 }
 505         }
 506
 507         /**
 508          * @param int $maxage Maximum cache time on the Squid, in seconds.
 509          */
 510         public function setSquidMaxage( $maxage ) {
 511                 $this->mSquidMaxage = $maxage;
 512         }
 513
 514         /**
 515          * Use enableClientCache(false) to force it to send nocache headers
 516          * @param $state ??
 517          */
 518         public function enableClientCache( $state ) {
 519                 return wfSetVar( $this->mEnableClientCache, $state );
 520         }
 521
 522         function getCacheVaryCookies() {
 523                 global $wgCookiePrefix;
 524                 return array(
 525                         "{$wgCookiePrefix}Token",
 526                         "{$wgCookiePrefix}LoggedOut",
 527                         session_name() );
 528         }
 529
 530         function uncacheableBecauseRequestVars() {
 531                 global $wgRequest;
 532                 return  $wgRequest->getText('useskin', false) === false
 533                         && $wgRequest->getText('uselang', false) === false;
 534         }
 535
 536         /**
 537          * Check if the request has a cache-varying cookie header
 538          * If it does, it's very important that we don't allow public caching
 539          */
 540         function haveCacheVaryCookies() {
 541                 global $wgRequest, $wgCookiePrefix;
 542                 $cookieHeader = $wgRequest->getHeader( 'cookie' );
 543                 if ( $cookieHeader === false ) {
 544                         return false;
 545                 }
 546                 $cvCookies = $this->getCacheVaryCookies();
 547                 foreach ( $cvCookies as $cookieName ) {
 548                         # Check for a simple string match, like the way squid does it
 549                         if ( strpos( $cookieHeader, $cookieName ) ) {
 550                                 wfDebug( __METHOD__.": found $cookieName\n" );
 551                                 return true;
 552                         }
 553                 }
 554                 wfDebug( __METHOD__.": no cache-varying cookies found\n" );
 555                 return false;
 556         }
 557
 558         /** Get a complete X-Vary-Options header */
 559         public function getXVO() {
 560                 global $wgCookiePrefix;
 561                 $cvCookies = $this->getCacheVaryCookies();
 562                 $xvo = 'X-Vary-Options: Accept-Encoding;list-contains=gzip,Cookie;';
 563                 foreach ( $cvCookies as $cookieName ) {
 564                         $xvo .= 'string-contains=' . $cookieName;
 565                 }
 566                 return $xvo;
 567         }
 568
 569         public function sendCacheControl() {
 570                 global $wgUseSquid, $wgUseESI, $wgUseETag, $wgSquidMaxage, $wgRequest;
 571                 $fname = 'OutputPage::sendCacheControl';
 572
 573                 $response = $wgRequest->response();
 574                 if ($wgUseETag && $this->mETag)
 575                         $response->header("ETag: $this->mETag");
 576
 577                 # don't serve compressed data to clients who can't handle it
 578                 # maintain different caches for logged-in users and non-logged in ones
 579                 $response->header( 'Vary: Accept-Encoding, Cookie' );
 580
 581                 # Add an X-Vary-Options header for Squid with Wikimedia patches
 582                 $response->header( $this->getXVO() );
 583
 584                 if( !$this->uncacheableBecauseRequestVars() && $this->mEnableClientCache ) {
 585                         if( $wgUseSquid && session_id() == '' &&
 586                           ! $this->isPrintable() && $this->mSquidMaxage != 0 && !$this->haveCacheVaryCookies() )
 587                         {
 588                                 if ( $wgUseESI ) {
 589                                         # We'll purge the proxy cache explicitly, but require end user agents
 590                                         # to revalidate against the proxy on each visit.
 591                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 592                                         wfDebug( "$fname: proxy caching with ESI; {$this->mLastModified} **\n", false );
 593                                         # start with a shorter timeout for initial testing
 594                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 595                                         $response->header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 596                                         $response->header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 597                                 } else {
 598                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 599                                         # to revalidate against the proxy on each visit.
 600                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 601                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 602                                         wfDebug( "$fname: local proxy caching; {$this->mLastModified} **\n", false );
 603                                         # start with a shorter timeout for initial testing
 604                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 605                                         $response->header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 606                                 }
 607                         } else {
 608                                 # We do want clients to cache if they can, but they *must* check for updates
 609                                 # on revisiting the page.
 610                                 wfDebug( "$fname: private caching; {$this->mLastModified} **\n", false );
 611                                 $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 612                                 $response->header( "Cache-Control: private, must-revalidate, max-age=0" );
 613                         }
 614                         if($this->mLastModified) $response->header( "Last-modified: {$this->mLastModified}" );
 615                 } else {
 616                         wfDebug( "$fname: no caching **\n", false );
 617
 618                         # In general, the absence of a last modified header should be enough to prevent
 619                         # the client from using its cache. We send a few other things just to make sure.
 620                         $response->header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 621                         $response->header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 622                         $response->header( 'Pragma: no-cache' );
 623                 }
 624         }
 625
 626         /**
 627          * Finally, all the text has been munged and accumulated into
 628          * the object, let's actually output it:
 629          */
 630         public function output() {
 631                 global $wgUser, $wgOutputEncoding, $wgRequest;
 632                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 633                 global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgAjaxSearch, $wgAjaxWatch;
 634                 global $wgServer, $wgStyleVersion;
 635
 636                 if( $this->mDoNothing ){
 637                         return;
 638                 }
 639                 $fname = 'OutputPage::output';
 640                 wfProfileIn( $fname );
 641
 642                 if ( '' != $this->mRedirect ) {
 643                         # Standards require redirect URLs to be absolute
 644                         $this->mRedirect = wfExpandUrl( $this->mRedirect );
 645                         if( $this->mRedirectCode == '301') {
 646                                 if( !$wgDebugRedirects ) {
 647                                         $wgRequest->response()->header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 648                                 }
 649                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 650                         }
 651
 652                         $this->sendCacheControl();
 653
 654                         $wgRequest->response()->header("Content-Type: text/html; charset=utf-8");
 655                         if( $wgDebugRedirects ) {
 656                                 $url = htmlspecialchars( $this->mRedirect );
 657                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 658                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 659                                 print "</body>\n</html>\n";
 660                         } else {
 661                                 $wgRequest->response()->header( 'Location: '.$this->mRedirect );
 662                         }
 663                         wfProfileOut( $fname );
 664                         return;
 665                 }
 666                 elseif ( $this->mStatusCode )
 667                 {
 668                         $statusMessage = array(
 669                                 100 => 'Continue',
 670                                 101 => 'Switching Protocols',
 671                                 102 => 'Processing',
 672                                 200 => 'OK',
 673                                 201 => 'Created',
 674                                 202 => 'Accepted',
 675                                 203 => 'Non-Authoritative Information',
 676                                 204 => 'No Content',
 677                                 205 => 'Reset Content',
 678                                 206 => 'Partial Content',
 679                                 207 => 'Multi-Status',
 680                                 300 => 'Multiple Choices',
 681                                 301 => 'Moved Permanently',
 682                                 302 => 'Found',
 683                                 303 => 'See Other',
 684                                 304 => 'Not Modified',
 685                                 305 => 'Use Proxy',
 686                                 307 => 'Temporary Redirect',
 687                                 400 => 'Bad Request',
 688                                 401 => 'Unauthorized',
 689                                 402 => 'Payment Required',
 690                                 403 => 'Forbidden',
 691                                 404 => 'Not Found',
 692                                 405 => 'Method Not Allowed',
 693                                 406 => 'Not Acceptable',
 694                                 407 => 'Proxy Authentication Required',
 695                                 408 => 'Request Timeout',
 696                                 409 => 'Conflict',
 697                                 410 => 'Gone',
 698                                 411 => 'Length Required',
 699                                 412 => 'Precondition Failed',
 700                                 413 => 'Request Entity Too Large',
 701                                 414 => 'Request-URI Too Large',
 702                                 415 => 'Unsupported Media Type',
 703                                 416 => 'Request Range Not Satisfiable',
 704                                 417 => 'Expectation Failed',
 705                                 422 => 'Unprocessable Entity',
 706                                 423 => 'Locked',
 707                                 424 => 'Failed Dependency',
 708                                 500 => 'Internal Server Error',
 709                                 501 => 'Not Implemented',
 710                                 502 => 'Bad Gateway',
 711                                 503 => 'Service Unavailable',
 712                                 504 => 'Gateway Timeout',
 713                                 505 => 'HTTP Version Not Supported',
 714                                 507 => 'Insufficient Storage'
 715                         );
 716
 717                         if ( $statusMessage[$this->mStatusCode] )
 718                                 $wgRequest->response()->header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 719                 }
 720
 721                 $sk = $wgUser->getSkin();
 722
 723                 if ( $wgUseAjax ) {
 724                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js?$wgStyleVersion\"></script>\n" );
 725
 726                         wfRunHooks( 'AjaxAddScript', array( &$this ) );
 727
 728                         if( $wgAjaxSearch && $wgUser->getBoolOption( 'ajaxsearch' ) ) {
 729                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxsearch.js?$wgStyleVersion\"></script>\n" );
 730                                 $this->addScript( "<script type=\"{$wgJsMimeType}\">hookEvent(\"load\", sajax_onload);</script>\n" );
 731                         }
 732
 733                         if( $wgAjaxWatch && $wgUser->isLoggedIn() ) {
 734                                 $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajaxwatch.js?$wgStyleVersion\"></script>\n" );
 735                         }
 736                 }
 737
 738
 739
 740                 # Buffer output; final headers may depend on later processing
 741                 ob_start();
 742
 743                 # Disable temporary placeholders, so that the skin produces HTML
 744                 $sk->postParseLinkColour( false );
 745
 746                 $wgRequest->response()->header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 747                 $wgRequest->response()->header( 'Content-language: '.$wgContLanguageCode );
 748
 749                 if ($this->mArticleBodyOnly) {
 750                         $this->out($this->mBodytext);
 751                 } else {
 752                         wfProfileIn( 'Output-skin' );
 753                         $sk->outputPage( $this );
 754                         wfProfileOut( 'Output-skin' );
 755                 }
 756
 757                 $this->sendCacheControl();
 758                 ob_end_flush();
 759                 wfProfileOut( $fname );
 760         }
 761
 762         /**
 763          * @todo document
 764          * @param string $ins
 765          */
 766         public function out( $ins ) {
 767                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 768                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 769                         $outs = $ins;
 770                 } else {
 771                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 772                         if ( false === $outs ) { $outs = $ins; }
 773                 }
 774                 print $outs;
 775         }
 776
 777         /**
 778          * @todo document
 779          */
 780         public static function setEncodings() {
 781                 global $wgInputEncoding, $wgOutputEncoding;
 782                 global $wgUser, $wgContLang;
 783
 784                 $wgInputEncoding = strtolower( $wgInputEncoding );
 785
 786                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 787                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 788                         return;
 789                 }
 790                 $wgOutputEncoding = $wgInputEncoding;
 791         }
 792
 793         /**
 794          * Deprecated, use wfReportTime() instead.
 795          * @return string
 796          * @deprecated
 797          */
 798         public function reportTime() {
 799                 $time = wfReportTime();
 800                 return $time;
 801         }
 802
 803         /**
 804          * Produce a "user is blocked" page.
 805          *
 806          * @param bool $return Whether to have a "return to $wgTitle" message or not.
 807          * @return nothing
 808          */
 809         function blockedPage( $return = true ) {
 810                 global $wgUser, $wgContLang, $wgTitle, $wgLang;
 811
 812                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 813                 $this->setRobotpolicy( 'noindex,nofollow' );
 814                 $this->setArticleRelated( false );
 815
 816                 $name = User::whoIs( $wgUser->blockedBy() );
 817                 $reason = $wgUser->blockedFor();
 818                 if( $reason == '' ) {
 819                         $reason = wfMsg( 'blockednoreason' );
 820                 }
 821                 $blockTimestamp = $wgLang->timeanddate( wfTimestamp( TS_MW, $wgUser->mBlock->mTimestamp ), true );
 822                 $ip = wfGetIP();
 823
 824                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 825
 826                 $blockid = $wgUser->mBlock->mId;
 827
 828                 $blockExpiry = $wgUser->mBlock->mExpiry;
 829                 if ( $blockExpiry == 'infinity' ) {
 830                         // Entry in database (table ipblocks) is 'infinity' but 'ipboptions' uses 'infinite' or 'indefinite'
 831                         // Search for localization in 'ipboptions'
 832                         $scBlockExpiryOptions = wfMsg( 'ipboptions' );
 833                         foreach ( explode( ',', $scBlockExpiryOptions ) as $option ) {
 834                                 if ( strpos( $option, ":" ) === false )
 835                                         continue;
 836                                 list( $show, $value ) = explode( ":", $option );
 837                                 if ( $value == 'infinite' || $value == 'indefinite' ) {
 838                                         $blockExpiry = $show;
 839                                         break;
 840                                 }
 841                         }
 842                 } else {
 843                         $blockExpiry = $wgLang->timeanddate( wfTimestamp( TS_MW, $blockExpiry ), true );
 844                 }
 845
 846                 if ( $wgUser->mBlock->mAuto ) {
 847                         $msg = 'autoblockedtext';
 848                 } else {
 849                         $msg = 'blockedtext';
 850                 }
 851
 852                 /* $ip returns who *is* being blocked, $intended contains who was meant to be blocked.
 853                  * This could be a username, an ip range, or a single ip. */
 854                 $intended = $wgUser->mBlock->mAddress;
 855
 856                 $this->addWikiMsg( $msg, $link, $reason, $ip, $name, $blockid, $blockExpiry, $intended, $blockTimestamp );
 857
 858                 # Don't auto-return to special pages
 859                 if( $return ) {
 860                         $return = $wgTitle->getNamespace() > -1 ? $wgTitle->getPrefixedText() : NULL;
 861                         $this->returnToMain( false, $return );
 862                 }
 863         }
 864
 865         /**
 866          * Output a standard error page
 867          *
 868          * @param string $title Message key for page title
 869          * @param string $msg Message key for page text
 870          * @param array $params Message parameters
 871          */
 872         public function showErrorPage( $title, $msg, $params = array() ) {
 873                 global $wgTitle;
 874                 if ( isset($wgTitle) ) {
 875                         $this->mDebugtext .= 'Original title: ' . $wgTitle->getPrefixedText() . "\n";
 876                 }
 877                 $this->setPageTitle( wfMsg( $title ) );
 878                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 879                 $this->setRobotpolicy( 'noindex,nofollow' );
 880                 $this->setArticleRelated( false );
 881                 $this->enableClientCache( false );
 882                 $this->mRedirect = '';
 883                 $this->mBodytext = '';
 884
 885                 array_unshift( $params, 'parse' );
 886                 array_unshift( $params, $msg );
 887                 $this->addHtml( call_user_func_array( 'wfMsgExt', $params ) );
 888
 889                 $this->returnToMain( false );
 890         }
 891
 892         /**
 893          * Output a standard permission error page
 894          *
 895          * @param array $errors Error message keys
 896          */
 897         public function showPermissionsErrorPage( $errors )
 898         {
 899                 global $wgTitle;
 900
 901                 $this->mDebugtext .= 'Original title: ' .
 902                 $wgTitle->getPrefixedText() . "\n";
 903                 $this->setPageTitle( wfMsg( 'permissionserrors' ) );
 904                 $this->setHTMLTitle( wfMsg( 'permissionserrors' ) );
 905                 $this->setRobotpolicy( 'noindex,nofollow' );
 906                 $this->setArticleRelated( false );
 907                 $this->enableClientCache( false );
 908                 $this->mRedirect = '';
 909                 $this->mBodytext = '';
 910                 $this->addWikiText( $this->formatPermissionsErrorMessage( $errors ) );
 911         }
 912
 913         /** @deprecated */
 914         public function errorpage( $title, $msg ) {
 915                 throw new ErrorPageError( $title, $msg );
 916         }
 917
 918         /**
 919          * Display an error page indicating that a given version of MediaWiki is
 920          * required to use it
 921          *
 922          * @param mixed $version The version of MediaWiki needed to use the page
 923          */
 924         public function versionRequired( $version ) {
 925                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 926                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 927                 $this->setRobotpolicy( 'noindex,nofollow' );
 928                 $this->setArticleRelated( false );
 929                 $this->mBodytext = '';
 930
 931                 $this->addWikiMsg( 'versionrequiredtext', $version );
 932                 $this->returnToMain();
 933         }
 934
 935         /**
 936          * Display an error page noting that a given permission bit is required.
 937          *
 938          * @param string $permission key required
 939          */
 940         public function permissionRequired( $permission ) {
 941                 global $wgGroupPermissions, $wgUser;
 942
 943                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 944                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 945                 $this->setRobotpolicy( 'noindex,nofollow' );
 946                 $this->setArticleRelated( false );
 947                 $this->mBodytext = '';
 948
 949                 $groups = array();
 950                 foreach( $wgGroupPermissions as $key => $value ) {
 951                         if( isset( $value[$permission] ) && $value[$permission] == true ) {
 952                                 $groupName = User::getGroupName( $key );
 953                                 $groupPage = User::getGroupPage( $key );
 954                                 if( $groupPage ) {
 955                                         $skin = $wgUser->getSkin();
 956                                         $groups[] = $skin->makeLinkObj( $groupPage, $groupName );
 957                                 } else {
 958                                         $groups[] = $groupName;
 959                                 }
 960                         }
 961                 }
 962                 $n = count( $groups );
 963                 $groups = implode( ', ', $groups );
 964                 switch( $n ) {
 965                         case 0:
 966                         case 1:
 967                         case 2:
 968                                 $message = wfMsgHtml( "badaccess-group$n", $groups );
 969                                 break;
 970                         default:
 971                                 $message = wfMsgHtml( 'badaccess-groups', $groups );
 972                 }
 973                 $this->addHtml( $message );
 974                 $this->returnToMain( false );
 975         }
 976
 977         /**
 978          * Use permissionRequired.
 979          * @deprecated
 980          */
 981         public function sysopRequired() {
 982                 throw new MWException( "Call to deprecated OutputPage::sysopRequired() method\n" );
 983         }
 984
 985         /**
 986          * Use permissionRequired.
 987          * @deprecated
 988          */
 989         public function developerRequired() {
 990                 throw new MWException( "Call to deprecated OutputPage::developerRequired() method\n" );
 991         }
 992
 993         /**
 994          * Produce the stock "please login to use the wiki" page
 995          */
 996         public function loginToUse() {
 997                 global $wgUser, $wgTitle, $wgContLang;
 998
 999                 if( $wgUser->isLoggedIn() ) {
1000                         $this->permissionRequired( 'read' );
1001                         return;
1002                 }
1003
1004                 $skin = $wgUser->getSkin();
1005
1006                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
1007                 $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
1008                 $this->setRobotPolicy( 'noindex,nofollow' );
1009                 $this->setArticleFlag( false );
1010
1011                 $loginTitle = SpecialPage::getTitleFor( 'Userlogin' );
1012                 $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
1013                 $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
1014                 $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
1015
1016                 # Don't return to the main page if the user can't read it
1017                 # otherwise we'll end up in a pointless loop
1018                 $mainPage = Title::newMainPage();
1019                 if( $mainPage->userCanRead() )
1020                         $this->returnToMain( true, $mainPage );
1021         }
1022
1023         /** @deprecated */
1024         public function databaseError( $fname, $sql, $error, $errno ) {
1025                 throw new MWException( "OutputPage::databaseError is obsolete\n" );
1026         }
1027
1028         /**
1029          * @param array $errors An array of arrays returned by Title::getUserPermissionsErrors
1030          * @return string The wikitext error-messages, formatted into a list.
1031          */
1032         public function formatPermissionsErrorMessage( $errors ) {
1033                 $text = wfMsgNoTrans( 'permissionserrorstext', count( $errors ) ) . "\n\n";
1034
1035                 if (count( $errors ) > 1) {
1036                         $text .= '<ul class="permissions-errors">' . "\n";
1037
1038                         foreach( $errors as $error )
1039                         {
1040                                 $text .= '<li>';
1041                                 $text .= call_user_func_array( 'wfMsgNoTrans', $error );
1042                                 $text .= "</li>\n";
1043                         }
1044                         $text .= '</ul>';
1045                 } else {
1046                         $text .= '<div class="permissions-errors">' . call_user_func_array( 'wfMsgNoTrans', $errors[0]) . '</div>';
1047                 }
1048
1049                 return $text;
1050         }
1051
1052         /**
1053          * Display a page stating that the Wiki is in read-only mode,
1054          * and optionally show the source of the page that the user
1055          * was trying to edit.  Should only be called (for this
1056          * purpose) after wfReadOnly() has returned true.
1057          *
1058          * For historical reasons, this function is _also_ used to
1059          * show the error message when a user tries to edit a page
1060          * they are not allowed to edit.  (Unless it's because they're
1061          * blocked, then we show blockedPage() instead.)  In this
1062          * case, the second parameter should be set to true and a list
1063          * of reasons supplied as the third parameter.
1064          *
1065          * @todo Needs to be split into multiple functions.
1066          *
1067          * @param string $source    Source code to show (or null).
1068          * @param bool   $protected Is this a permissions error?
1069          * @param array  $reasons   List of reasons for this error, as returned by Title::getUserPermissionsErrors().
1070          */
1071         public function readOnlyPage( $source = null, $protected = false, $reasons = array() ) {
1072                 global $wgUser, $wgReadOnlyFile, $wgReadOnly, $wgTitle;
1073                 $skin = $wgUser->getSkin();
1074
1075                 $this->setRobotpolicy( 'noindex,nofollow' );
1076                 $this->setArticleRelated( false );
1077
1078                 // If no reason is given, just supply a default "I can't let you do
1079                 // that, Dave" message.  Should only occur if called by legacy code.
1080                 if ( $protected && empty($reasons) ) {
1081                         $reasons[] = array( 'badaccess-group0' );
1082                 }
1083
1084                 if ( !empty($reasons) ) {
1085                         // Permissions error
1086                         if( $source ) {
1087                                 $this->setPageTitle( wfMsg( 'viewsource' ) );
1088                                 $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
1089                         } else {
1090                                 $this->setPageTitle( wfMsg( 'badaccess' ) );
1091                         }
1092                         $this->addWikiText( $this->formatPermissionsErrorMessage( $reasons ) );
1093                 } else {
1094                         // Wiki is read only
1095                         $this->setPageTitle( wfMsg( 'readonly' ) );
1096                         if ( $wgReadOnly ) {
1097                                 $reason = $wgReadOnly;
1098                         } else {
1099                                 // Should not happen, user should have called wfReadOnly() first
1100                                 $reason = file_get_contents( $wgReadOnlyFile );
1101                         }
1102                         $this->addWikiMsg( 'readonlytext', $reason );
1103                 }
1104
1105                 // Show source, if supplied
1106                 if( is_string( $source ) ) {
1107                         $this->addWikiMsg( 'viewsourcetext' );
1108                         $text = wfOpenElement( 'textarea',
1109                                                 array( 'id'   => 'wpTextbox1',
1110                                                        'name' => 'wpTextbox1',
1111                                                        'cols' => $wgUser->getOption( 'cols' ),
1112                                                        'rows' => $wgUser->getOption( 'rows' ),
1113                                                        'readonly' => 'readonly' ) );
1114                         $text .= htmlspecialchars( $source );
1115                         $text .= wfCloseElement( 'textarea' );
1116                         $this->addHTML( $text );
1117
1118                         // Show templates used by this article
1119                         $skin = $wgUser->getSkin();
1120                         $article = new Article( $wgTitle );
1121                         $this->addHTML( $skin->formatTemplates( $article->getUsedTemplates() ) );
1122                 }
1123
1124                 # If the title doesn't exist, it's fairly pointless to print a return
1125                 # link to it.  After all, you just tried editing it and couldn't, so
1126                 # what's there to do there?
1127                 if( $wgTitle->exists() ) {
1128                         $this->returnToMain( false, $wgTitle );
1129                 }
1130         }
1131
1132         /** @deprecated */
1133         public function fatalError( $message ) {
1134                 throw new FatalError( $message );
1135         }
1136
1137         /** @deprecated */
1138         public function unexpectedValueError( $name, $val ) {
1139                 throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
1140         }
1141
1142         /** @deprecated */
1143         public function fileCopyError( $old, $new ) {
1144                 throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
1145         }
1146
1147         /** @deprecated */
1148         public function fileRenameError( $old, $new ) {
1149                 throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
1150         }
1151
1152         /** @deprecated */
1153         public function fileDeleteError( $name ) {
1154                 throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
1155         }
1156
1157         /** @deprecated */
1158         public function fileNotFoundError( $name ) {
1159                 throw new FatalError( wfMsg( 'filenotfound', $name ) );
1160         }
1161
1162         public function showFatalError( $message ) {
1163                 $this->setPageTitle( wfMsg( "internalerror" ) );
1164                 $this->setRobotpolicy( "noindex,nofollow" );
1165                 $this->setArticleRelated( false );
1166                 $this->enableClientCache( false );
1167                 $this->mRedirect = '';
1168                 $this->mBodytext = $message;
1169         }
1170
1171         public function showUnexpectedValueError( $name, $val ) {
1172                 $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
1173         }
1174
1175         public function showFileCopyError( $old, $new ) {
1176                 $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
1177         }
1178
1179         public function showFileRenameError( $old, $new ) {
1180                 $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
1181         }
1182
1183         public function showFileDeleteError( $name ) {
1184                 $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
1185         }
1186
1187         public function showFileNotFoundError( $name ) {
1188                 $this->showFatalError( wfMsg( 'filenotfound', $name ) );
1189         }
1190
1191         /**
1192          * Add a "return to" link pointing to a specified title
1193          *
1194          * @param Title $title Title to link
1195          */
1196         public function addReturnTo( $title ) {
1197                 global $wgUser;
1198                 $link = wfMsg( 'returnto', $wgUser->getSkin()->makeLinkObj( $title ) );
1199                 $this->addHtml( "<p>{$link}</p>\n" );
1200         }
1201
1202         /**
1203          * Add a "return to" link pointing to a specified title,
1204          * or the title indicated in the request, or else the main page
1205          *
1206          * @param null $unused No longer used
1207          * @param Title $returnto Title to return to
1208          */
1209         public function returnToMain( $unused = null, $returnto = NULL ) {
1210                 global $wgRequest;
1211
1212                 if ( $returnto == NULL ) {
1213                         $returnto = $wgRequest->getText( 'returnto' );
1214                 }
1215
1216                 if ( '' === $returnto ) {
1217                         $returnto = Title::newMainPage();
1218                 }
1219
1220                 if ( is_object( $returnto ) ) {
1221                         $titleObj = $returnto;
1222                 } else {
1223                         $titleObj = Title::newFromText( $returnto );
1224                 }
1225                 if ( !is_object( $titleObj ) ) {
1226                         $titleObj = Title::newMainPage();
1227                 }
1228
1229                 $this->addReturnTo( $titleObj );
1230         }
1231
1232         /**
1233          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
1234          * and uses the first 10 of them for META keywords
1235          *
1236          * @param ParserOutput &$parserOutput
1237          */
1238         private function addKeywords( &$parserOutput ) {
1239                 global $wgTitle;
1240                 $this->addKeyword( $wgTitle->getPrefixedText() );
1241                 $count = 1;
1242                 $links2d =& $parserOutput->getLinks();
1243                 if ( !is_array( $links2d ) ) {
1244                         return;
1245                 }
1246                 foreach ( $links2d as $dbkeys ) {
1247                         foreach( $dbkeys as $dbkey => $unused ) {
1248                                 $this->addKeyword( $dbkey );
1249                                 if ( ++$count > 10 ) {
1250                                         break 2;
1251                                 }
1252                         }
1253                 }
1254         }
1255
1256         /**
1257          * @return string The doctype, opening <html>, and head element.
1258          */
1259         public function headElement() {
1260                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
1261                 global $wgXhtmlDefaultNamespace, $wgXhtmlNamespaces;
1262                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle, $wgStyleVersion;
1263
1264                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
1265                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
1266                 } else {
1267                         $ret = '';
1268                 }
1269
1270                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
1271
1272                 if ( '' == $this->getHTMLTitle() ) {
1273                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
1274                 }
1275
1276                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
1277                 $ret .= "<html xmlns=\"{$wgXhtmlDefaultNamespace}\" ";
1278                 foreach($wgXhtmlNamespaces as $tag => $ns) {
1279                         $ret .= "xmlns:{$tag}=\"{$ns}\" ";
1280                 }
1281                 $ret .= "xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
1282                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
1283                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
1284
1285                 $ret .= $this->getHeadLinks();
1286                 global $wgStylePath;
1287                 if( $this->isPrintable() ) {
1288                         $media = '';
1289                 } else {
1290                         $media = "media='print'";
1291                 }
1292                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css?$wgStyleVersion" );
1293                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
1294
1295                 $sk = $wgUser->getSkin();
1296                 $ret .= $sk->getHeadScripts( $this->mAllowUserJs );
1297                 $ret .= $this->mScripts;
1298                 $ret .= $sk->getUserStyles();
1299                 $ret .= $this->getHeadItems();
1300
1301                 if ($wgUseTrackbacks && $this->isArticleRelated())
1302                         $ret .= $wgTitle->trackbackRDF();
1303
1304                 $ret .= "</head>\n";
1305                 return $ret;
1306         }
1307
1308         /**
1309          * @return string HTML tag links to be put in the header.
1310          */
1311         public function getHeadLinks() {
1312                 global $wgRequest;
1313                 $ret = '';
1314                 foreach ( $this->mMetatags as $tag ) {
1315                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
1316                                 $a = 'http-equiv';
1317                                 $tag[0] = substr( $tag[0], 5 );
1318                         } else {
1319                                 $a = 'name';
1320                         }
1321                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
1322                 }
1323
1324                 $p = $this->mRobotpolicy;
1325                 if( $p !== '' && $p != 'index,follow' ) {
1326                         // http://www.robotstxt.org/wc/meta-user.html
1327                         // Only show if it's different from the default robots policy
1328                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
1329                 }
1330
1331                 if ( count( $this->mKeywords ) > 0 ) {
1332                         $strip = array(
1333                                 "/<.*?>/" => '',
1334                                 "/_/" => ' '
1335                         );
1336                         $ret .= "\t\t<meta name=\"keywords\" content=\"" .
1337                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
1338                 }
1339                 foreach ( $this->mLinktags as $tag ) {
1340                         $ret .= "\t\t<link";
1341                         foreach( $tag as $attr => $val ) {
1342                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
1343                         }
1344                         $ret .= " />\n";
1345                 }
1346
1347                 foreach( $this->getSyndicationLinks() as $format => $link ) {
1348                         # Use the page name for the title (accessed through $wgTitle since
1349                         # there's no other way).  In principle, this could lead to issues
1350                         # with having the same name for different feeds corresponding to
1351                         # the same page, but we can't avoid that at this low a level.
1352                         global $wgTitle;
1353
1354                         $ret .= $this->feedLink(
1355                                 $format,
1356                                 $link,
1357                                 wfMsg( "page-{$format}-feed", $wgTitle->getPrefixedText() ) ); # Used messages: 'page-rss-feed' and 'page-atom-feed' (for an easier grep)
1358                 }
1359
1360                 # Recent changes feed should appear on every page
1361                 # Put it after the per-page feed to avoid changing existing behavior.
1362                 # It's still available, probably via a menu in your browser.
1363                 global $wgSitename;
1364                 $rctitle = SpecialPage::getTitleFor( 'Recentchanges' );
1365                 $ret .= $this->feedLink(
1366                         'rss',
1367                         $rctitle->getFullURL( 'feed=rss' ),
1368                         wfMsg( 'site-rss-feed', $wgSitename ) );
1369                 $ret .= $this->feedLink(
1370                         'atom',
1371                         $rctitle->getFullURL( 'feed=atom' ),
1372                         wfMsg( 'site-atom-feed', $wgSitename ) );
1373
1374                 return $ret;
1375         }
1376
1377         /**
1378          * Return URLs for each supported syndication format for this page.
1379          * @return array associating format keys with URLs
1380          */
1381         public function getSyndicationLinks() {
1382                 global $wgTitle, $wgFeedClasses;
1383                 $links = array();
1384
1385                 if( $this->isSyndicated() ) {
1386                         if( is_string( $this->getFeedAppendQuery() ) ) {
1387                                 $appendQuery = "&" . $this->getFeedAppendQuery();
1388                         } else {
1389                                 $appendQuery = "";
1390                         }
1391
1392                         foreach( $wgFeedClasses as $format => $class ) {
1393                                 $links[$format] = $wgTitle->getLocalUrl( "feed=$format{$appendQuery}" );
1394                         }
1395                 }
1396                 return $links;
1397         }
1398
1399         /**
1400          * Generate a <link rel/> for an RSS feed.
1401          */
1402         private function feedLink( $type, $url, $text ) {
1403                 return Xml::element( 'link', array(
1404                         'rel' => 'alternate',
1405                         'type' => "application/$type+xml",
1406                         'title' => $text,
1407                         'href' => $url ) ) . "\n";
1408         }
1409
1410         /**
1411          * Turn off regular page output and return an error reponse
1412          * for when rate limiting has triggered.
1413          */
1414         public function rateLimited() {
1415                 global $wgOut, $wgTitle;
1416
1417                 $this->setPageTitle(wfMsg('actionthrottled'));
1418                 $this->setRobotPolicy( 'noindex,follow' );
1419                 $this->setArticleRelated( false );
1420                 $this->enableClientCache( false );
1421                 $this->mRedirect = '';
1422                 $this->clearHTML();
1423                 $this->setStatusCode(503);
1424                 $this->addWikiMsg( 'actionthrottledtext' );
1425
1426                 $this->returnToMain( false, $wgTitle );
1427         }
1428
1429         /**
1430          * Show an "add new section" link?
1431          *
1432          * @return bool
1433          */
1434         public function showNewSectionLink() {
1435                 return $this->mNewSectionLink;
1436         }
1437
1438         /**
1439          * Show a warning about slave lag
1440          *
1441          * If the lag is higher than $wgSlaveLagCritical seconds,
1442          * then the warning is a bit more obvious. If the lag is
1443          * lower than $wgSlaveLagWarning, then no warning is shown.
1444          *
1445          * @param int $lag Slave lag
1446          */
1447         public function showLagWarning( $lag ) {
1448                 global $wgSlaveLagWarning, $wgSlaveLagCritical;
1449                 if( $lag >= $wgSlaveLagWarning ) {
1450                         $message = $lag < $wgSlaveLagCritical
1451                                 ? 'lag-warn-normal'
1452                                 : 'lag-warn-high';
1453                         $warning = wfMsgExt( $message, 'parse', $lag );
1454                         $this->addHtml( "<div class=\"mw-{$message}\">\n{$warning}\n</div>\n" );
1455                 }
1456         }
1457
1458         /**
1459          * Add a wikitext-formatted message to the output.
1460          * This is equivalent to:
1461          *
1462          *    $wgOut->addWikiText( wfMsgNoTrans( ... ) )
1463          */
1464         public function addWikiMsg( /*...*/ ) {
1465                 $args = func_get_args();
1466                 $name = array_shift( $args );
1467                 $this->addWikiMsgArray( $name, $args );
1468         }
1469
1470         /**
1471          * Add a wikitext-formatted message to the output.
1472          * Like addWikiMsg() except the parameters are taken as an array
1473          * instead of a variable argument list.
1474          *
1475          * $options is passed through to wfMsgExt(), see that function for details.
1476          */
1477         public function addWikiMsgArray( $name, $args, $options = array() ) {
1478                 $options[] = 'parse';
1479                 $text = wfMsgExt( $name, $options, $args );
1480                 $this->addHTML( $text );
1481         }
1482
1483         /**
1484          * This function takes a number of message/argument specifications, wraps them in
1485          * some overall structure, and then parses the result and adds it to the output.
1486          *
1487          * In the $wrap, $1 is replaced with the first message, $2 with the second, and so
1488          * on. The subsequent arguments may either be strings, in which case they are the
1489          * message names, or an arrays, in which case the first element is the message name,
1490          * and subsequent elements are the parameters to that message.
1491          *
1492          * The special named parameter 'options' in a message specification array is passed
1493          * through to the $options parameter of wfMsgExt().
1494          *
1495          * For example:
1496          *
1497          *    $wgOut->wrapWikiMsg( '<div class="error">$1</div>', 'some-error' );
1498          *
1499          * Is equivalent to:
1500          *
1501          *    $wgOut->addWikiText( '<div class="error">' . wfMsgNoTrans( 'some-error' ) . '</div>' );
1502          */
1503         public function wrapWikiMsg( $wrap /*, ...*/ ) {
1504                 $msgSpecs = func_get_args();
1505                 array_shift( $msgSpecs );
1506                 $msgSpecs = array_values( $msgSpecs );
1507                 $s = $wrap;
1508                 foreach ( $msgSpecs as $n => $spec ) {
1509                         $options = array();
1510                         if ( is_array( $spec ) ) {
1511                                 $args = $spec;
1512                                 $name = array_shift( $args );
1513                                 if ( isset( $args['options'] ) ) {
1514                                         $options = $args['options'];
1515                                         unset( $args['options'] );
1516                                 }
1517                         }  else {
1518                                 $args = array();
1519                                 $name = $spec;
1520                         }
1521                         $s = str_replace( '$' . ($n+1), wfMsgExt( $name, $options, $args ), $s );
1522                 }
1523                 $this->addHTML( $this->parse( $s ) );
1524         }
1525 }