includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( -1 );
   4 /**
   5  * @package MediaWiki
   6  */
   7
   8 if ( $wgUseTeX )
   9         require_once 'Math.php';
  10
  11 /**
  12  * @todo document
  13  * @package MediaWiki
  14  */
  15 class OutputPage {
  16         var $mHeaders, $mMetatags, $mKeywords;
  17         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  18         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  19         var $mSubtitle, $mRedirect, $mStatusCode;
  20         var $mLastModified, $mETag, $mCategoryLinks;
  21         var $mScripts, $mLinkColours, $mPageLinkTitle;
  22
  23         var $mSuppressQuickbar;
  24         var $mOnloadHandler;
  25         var $mDoNothing;
  26         var $mContainsOldMagic, $mContainsNewMagic;
  27         var $mIsArticleRelated;
  28         var $mParserOptions;
  29         var $mShowFeedLinks = false;
  30         var $mEnableClientCache = true;
  31         var $mArticleBodyOnly = false;
  32
  33         /**
  34          * Constructor
  35          * Initialise private variables
  36          */
  37         function OutputPage() {
  38                 $this->mHeaders = $this->mMetatags =
  39                 $this->mKeywords = $this->mLinktags = array();
  40                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  41                 $this->mRedirect = $this->mLastModified =
  42                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  43                 $this->mOnloadHandler = $this->mPageLinkTitle = '';
  44                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  45                 $this->mSuppressQuickbar = $this->mPrintable = false;
  46                 $this->mLanguageLinks = array();
  47                 $this->mCategoryLinks = array();
  48                 $this->mDoNothing = false;
  49                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  50                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  51                 $this->mSquidMaxage = 0;
  52                 $this->mScripts = '';
  53                 $this->mETag = false;
  54                 $this->mRevisionId = null;
  55         }
  56
  57         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ); }
  58         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  59         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  60
  61         # To add an http-equiv meta tag, precede the name with "http:"
  62         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  63         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  64         function addScript( $script ) { $this->mScripts .= $script; }
  65         function getScript() { return $this->mScripts; }
  66
  67         function setETag($tag) { $this->mETag = $tag; }
  68         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
  69         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
  70
  71         function addLink( $linkarr ) {
  72                 # $linkarr should be an associative array of attributes. We'll escape on output.
  73                 array_push( $this->mLinktags, $linkarr );
  74         }
  75
  76         function addMetadataLink( $linkarr ) {
  77                 # note: buggy CC software only reads first "meta" link
  78                 static $haveMeta = false;
  79                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  80                 $this->addLink( $linkarr );
  81                 $haveMeta = true;
  82         }
  83
  84         /**
  85          * checkLastModified tells the client to use the client-cached page if
  86          * possible. If sucessful, the OutputPage is disabled so that
  87          * any future call to OutputPage->output() have no effect. The method
  88          * returns true iff cache-ok headers was sent.
  89          */
  90         function checkLastModified ( $timestamp ) {
  91                 global $wgCachePages, $wgCacheEpoch, $wgUser;
  92                 if ( !$timestamp || $timestamp == '19700101000000' ) {
  93                         wfDebug( "CACHE DISABLED, NO TIMESTAMP\n" );
  94                         return;
  95                 }
  96                 if( !$wgCachePages ) {
  97                         wfDebug( "CACHE DISABLED\n", false );
  98                         return;
  99                 }
 100                 if( $wgUser->getOption( 'nocache' ) ) {
 101                         wfDebug( "USER DISABLED CACHE\n", false );
 102                         return;
 103                 }
 104
 105                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 106                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 107
 108                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 109                         # IE sends sizes after the date like this:
 110                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 111                         # this breaks strtotime().
 112                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 113                         $modsinceTime = strtotime( $modsince );
 114                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 115                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 116                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 117                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
 118                                 # Make sure you're in a place you can leave when you call us!
 119                                 header( "HTTP/1.0 304 Not Modified" );
 120                                 $this->mLastModified = $lastmod;
 121                                 $this->sendCacheControl();
 122                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 123                                 $this->disable();
 124                                 @ob_end_clean(); // Don't output compressed blob
 125                                 return true;
 126                         } else {
 127                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
 128                                 $this->mLastModified = $lastmod;
 129                         }
 130                 } else {
 131                         wfDebug( "client did not send If-Modified-Since header\n", false );
 132                         $this->mLastModified = $lastmod;
 133                 }
 134         }
 135
 136         function getPageTitleActionText () {
 137                 global $action;
 138                 switch($action) {
 139                         case 'edit':
 140                         case 'delete':
 141                         case 'protect':
 142                         case 'unprotect':
 143                         case 'watch':
 144                         case 'unwatch':
 145                                 // Display title is already customized
 146                                 return '';
 147                         case 'history':
 148                                 return wfMsg('history_short');
 149                         case 'submit':
 150                                 // FIXME: bug 2735; not correct for special pages etc
 151                                 return wfMsg('preview');
 152                         case 'info':
 153                                 return wfMsg('info_short');
 154                         default:
 155                                 return '';
 156                 }
 157         }
 158
 159         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 160         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 161         function setPageTitle( $name ) {
 162                 global $action, $wgContLang;
 163                 $name = $wgContLang->convert($name, true);
 164                 $this->mPagetitle = $name;
 165                 if(!empty($action)) {
 166                         $taction =  $this->getPageTitleActionText();
 167                         if( !empty( $taction ) ) {
 168                                 $name .= ' - '.$taction;
 169                         }
 170                 }
 171
 172                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 173         }
 174         function getHTMLTitle() { return $this->mHTMLtitle; }
 175         function getPageTitle() { return $this->mPagetitle; }
 176         function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 177         function getSubtitle() { return $this->mSubtitle; }
 178         function isArticle() { return $this->mIsarticle; }
 179         function setPrintable() { $this->mPrintable = true; }
 180         function isPrintable() { return $this->mPrintable; }
 181         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 182         function isSyndicated() { return $this->mShowFeedLinks; }
 183         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 184         function getOnloadHandler() { return $this->mOnloadHandler; }
 185         function disable() { $this->mDoNothing = true; }
 186
 187         function setArticleRelated( $v ) {
 188                 $this->mIsArticleRelated = $v;
 189                 if ( !$v ) {
 190                         $this->mIsarticle = false;
 191                 }
 192         }
 193         function setArticleFlag( $v ) {
 194                 $this->mIsarticle = $v;
 195                 if ( $v ) {
 196                         $this->mIsArticleRelated = $v;
 197                 }
 198         }
 199
 200         function isArticleRelated() { return $this->mIsArticleRelated; }
 201
 202         function getLanguageLinks() { return $this->mLanguageLinks; }
 203         function addLanguageLinks($newLinkArray) {
 204                 $this->mLanguageLinks += $newLinkArray;
 205         }
 206         function setLanguageLinks($newLinkArray) {
 207                 $this->mLanguageLinks = $newLinkArray;
 208         }
 209
 210         function getCategoryLinks() {
 211                 return $this->mCategoryLinks;
 212         }
 213
 214         /**
 215          * Add an array of categories, with names in the keys
 216          */
 217         function addCategoryLinks($categories) {
 218                 global $wgUser, $wgContLang;
 219
 220                 if ( !is_array( $categories ) ) {
 221                         return;
 222                 }
 223                 # Add the links to the link cache in a batch
 224                 $arr = array( NS_CATEGORY => $categories );
 225                 $lb = new LinkBatch;
 226                 $lb->setArray( $arr );
 227                 $lb->execute();
 228
 229                 $sk =& $wgUser->getSkin();
 230                 foreach ( $categories as $category => $arbitrary ) {
 231                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 232                         $text = $wgContLang->convertHtml( $title->getText() );
 233                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 234                 }
 235         }
 236
 237         function setCategoryLinks($categories) {
 238                 $this->mCategoryLinks = array();
 239                 $this->addCategoryLinks($categories);
 240         }
 241
 242         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 243         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 244
 245         function addHTML( $text ) { $this->mBodytext .= $text; }
 246         function clearHTML() { $this->mBodytext = ''; }
 247         function getHTML() { return $this->mBodytext; }
 248         function debug( $text ) { $this->mDebugtext .= $text; }
 249
 250         /* @deprecated */
 251         function setParserOptions( $options ) {
 252                 return $this->ParserOptions( $options );
 253         }
 254
 255         function ParserOptions( $options = null ) {
 256                 return wfSetVar( $this->mParserOptions, $options );
 257         }
 258
 259         /**
 260          * Set the revision ID which will be seen by the wiki text parser
 261          * for things such as embedded {{REVISIONID}} variable use.
 262          * @param mixed $revid an integer, or NULL
 263          * @return mixed previous value
 264          */
 265         function setRevisionId( $revid ) {
 266                 $val = is_null( $revid ) ? null : intval( $revid );
 267                 return wfSetVar( $this->mRevisionId, $val );
 268         }
 269
 270         /**
 271          * Convert wikitext to HTML and add it to the buffer
 272          * Default assumes that the current page title will
 273          * be used.
 274          */
 275         function addWikiText( $text, $linestart = true ) {
 276                 global $wgTitle;
 277                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 278         }
 279
 280         function addWikiTextWithTitle($text, &$title, $linestart = true) {
 281                 $this->addWikiTextTitle($text, $title, $linestart);
 282         }
 283
 284         function addWikiTextTitle($text, &$title, $linestart) {
 285                 global $wgParser;
 286                 $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions,
 287                         $linestart, true, $this->mRevisionId );
 288                 $this->addParserOutput( $parserOutput );
 289         }
 290
 291         function addParserOutputNoText( &$parserOutput ) {
 292                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 293                 $this->addCategoryLinks( $parserOutput->getCategories() );
 294                 $this->addKeywords( $parserOutput );
 295                 if ( $parserOutput->getCacheTime() == -1 ) {
 296                         $this->enableClientCache( false );
 297                 }
 298                 if ( $parserOutput->mHTMLtitle != "" ) {
 299                         $this->mPagetitle = $parserOutput->mHTMLtitle ;
 300                         $this->mSubtitle .= $parserOutput->mSubtitle ;
 301                 }
 302         }
 303
 304         function addParserOutput( &$parserOutput ) {
 305                 $this->addParserOutputNoText( $parserOutput );
 306                 $this->addHTML( $parserOutput->getText() );
 307         }
 308
 309         /**
 310          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 311          * Saves the text into the parser cache if possible
 312          */
 313         function addPrimaryWikiText( $text, $article, $cache = true ) {
 314                 global $wgParser, $wgUser;
 315
 316                 $this->mParserOptions->setTidy(true);
 317                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 318                         $this->mParserOptions, true, true, $this->mRevisionId );
 319                 $this->mParserOptions->setTidy(false);
 320                 if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
 321                         $parserCache =& ParserCache::singleton();
 322                         $parserCache->save( $parserOutput, $article, $wgUser );
 323                 }
 324
 325                 $this->addParserOutputNoText( $parserOutput );
 326                 $text = $parserOutput->getText();
 327                 wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
 328                 $parserOutput->setText( $text );
 329                 $this->addHTML( $parserOutput->getText() );
 330         }
 331
 332         /**
 333          * For anything that isn't primary text or interface message
 334          */
 335         function addSecondaryWikiText( $text, $linestart = true ) {
 336                 global $wgTitle;
 337                 $this->mParserOptions->setTidy(true);
 338                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 339                 $this->mParserOptions->setTidy(false);
 340         }
 341
 342
 343         /**
 344          * Add the output of a QuickTemplate to the output buffer
 345          * @param QuickTemplate $template
 346          */
 347         function addTemplate( &$template ) {
 348                 ob_start();
 349                 $template->execute();
 350                 $this->addHTML( ob_get_contents() );
 351                 ob_end_clean();
 352         }
 353
 354         /**
 355          * Parse wikitext and return the HTML.
 356          */
 357         function parse( $text, $linestart = true, $interface = false ) {
 358                 global $wgParser, $wgTitle;
 359                 if ( $interface) { $this->mParserOptions->setInterfaceMessage(true); }
 360                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions,
 361                         $linestart, true, $this->mRevisionId );
 362                 if ( $interface) { $this->mParserOptions->setInterfaceMessage(false); }
 363                 return $parserOutput->getText();
 364         }
 365
 366         /**
 367          * @param $article
 368          * @param $user
 369          *
 370          * @return bool
 371          */
 372         function tryParserCache( &$article, $user ) {
 373                 $parserCache =& ParserCache::singleton();
 374                 $parserOutput = $parserCache->get( $article, $user );
 375                 if ( $parserOutput !== false ) {
 376                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 377                         $this->addCategoryLinks( $parserOutput->getCategories() );
 378                         $this->addKeywords( $parserOutput );
 379                         $text = $parserOutput->getText();
 380                         wfRunHooks( 'OutputPageBeforeHTML', array( &$this, &$text ) );
 381                         $this->addHTML( $text );
 382                         $t = $parserOutput->getTitleText();
 383                         if( !empty( $t ) ) {
 384                                 $this->setPageTitle( $t );
 385                         }
 386                         return true;
 387                 } else {
 388                         return false;
 389                 }
 390         }
 391
 392         /**
 393          * Set the maximum cache time on the Squid in seconds
 394          * @param $maxage
 395          */
 396         function setSquidMaxage( $maxage ) {
 397                 $this->mSquidMaxage = $maxage;
 398         }
 399
 400         /**
 401          * Use enableClientCache(false) to force it to send nocache headers
 402          * @param $state
 403          */
 404         function enableClientCache( $state ) {
 405                 return wfSetVar( $this->mEnableClientCache, $state );
 406         }
 407
 408         function uncacheableBecauseRequestvars() {
 409                 global $wgRequest;
 410                 return  $wgRequest->getText('useskin', false) === false
 411                         && $wgRequest->getText('uselang', false) === false;
 412         }
 413
 414         function sendCacheControl() {
 415                 global $wgUseSquid, $wgUseESI, $wgSquidMaxage;
 416
 417                 if ($this->mETag)
 418                         header("ETag: $this->mETag");
 419
 420                 # don't serve compressed data to clients who can't handle it
 421                 # maintain different caches for logged-in users and non-logged in ones
 422                 header( 'Vary: Accept-Encoding, Cookie' );
 423                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 424                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 425                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 426                         {
 427                                 if ( $wgUseESI ) {
 428                                         # We'll purge the proxy cache explicitly, but require end user agents
 429                                         # to revalidate against the proxy on each visit.
 430                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 431                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 432                                         # start with a shorter timeout for initial testing
 433                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 434                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 435                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 436                                 } else {
 437                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 438                                         # to revalidate against the proxy on each visit.
 439                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 440                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 441                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 442                                         # start with a shorter timeout for initial testing
 443                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 444                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 445                                 }
 446                         } else {
 447                                 # We do want clients to cache if they can, but they *must* check for updates
 448                                 # on revisiting the page.
 449                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 450                                 header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 451                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 452                         }
 453                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 454                 } else {
 455                         wfDebug( "** no caching **\n", false );
 456
 457                         # In general, the absence of a last modified header should be enough to prevent
 458                         # the client from using its cache. We send a few other things just to make sure.
 459                         header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
 460                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 461                         header( 'Pragma: no-cache' );
 462                 }
 463         }
 464
 465         /**
 466          * Finally, all the text has been munged and accumulated into
 467          * the object, let's actually output it:
 468          */
 469         function output() {
 470                 global $wgUser, $wgOutputEncoding;
 471                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
 472                 global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgScriptPath, $wgServer;
 473
 474                 if( $this->mDoNothing ){
 475                         return;
 476                 }
 477                 $fname = 'OutputPage::output';
 478                 wfProfileIn( $fname );
 479                 $sk = $wgUser->getSkin();
 480
 481                 if ( $wgUseAjax ) {
 482                         $this->addScript( "<script type=\"{$wgJsMimeType}\">
 483                                 var wgScriptPath=\"{$wgScriptPath}\";
 484                                 var wgServer=\"{$wgServer}\";
 485                         </script>" );
 486                         $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js\"></script>\n" );
 487                 }
 488
 489                 if ( '' != $this->mRedirect ) {
 490                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 491                                 # Standards require redirect URLs to be absolute
 492                                 global $wgServer;
 493                                 $this->mRedirect = $wgServer . $this->mRedirect;
 494                         }
 495                         if( $this->mRedirectCode == '301') {
 496                                 if( !$wgDebugRedirects ) {
 497                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 498                                 }
 499                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 500                         }
 501
 502                         $this->sendCacheControl();
 503
 504                         if( $wgDebugRedirects ) {
 505                                 $url = htmlspecialchars( $this->mRedirect );
 506                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 507                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 508                                 print "</body>\n</html>\n";
 509                         } else {
 510                                 header( 'Location: '.$this->mRedirect );
 511                         }
 512                         wfProfileOut( $fname );
 513                         return;
 514                 }
 515                 elseif ( $this->mStatusCode )
 516                 {
 517                         $statusMessage = array(
 518                                 100 => 'Continue',
 519                                 101 => 'Switching Protocols',
 520                                 102 => 'Processing',
 521                                 200 => 'OK',
 522                                 201 => 'Created',
 523                                 202 => 'Accepted',
 524                                 203 => 'Non-Authoritative Information',
 525                                 204 => 'No Content',
 526                                 205 => 'Reset Content',
 527                                 206 => 'Partial Content',
 528                                 207 => 'Multi-Status',
 529                                 300 => 'Multiple Choices',
 530                                 301 => 'Moved Permanently',
 531                                 302 => 'Found',
 532                                 303 => 'See Other',
 533                                 304 => 'Not Modified',
 534                                 305 => 'Use Proxy',
 535                                 307 => 'Temporary Redirect',
 536                                 400 => 'Bad Request',
 537                                 401 => 'Unauthorized',
 538                                 402 => 'Payment Required',
 539                                 403 => 'Forbidden',
 540                                 404 => 'Not Found',
 541                                 405 => 'Method Not Allowed',
 542                                 406 => 'Not Acceptable',
 543                                 407 => 'Proxy Authentication Required',
 544                                 408 => 'Request Timeout',
 545                                 409 => 'Conflict',
 546                                 410 => 'Gone',
 547                                 411 => 'Length Required',
 548                                 412 => 'Precondition Failed',
 549                                 413 => 'Request Entity Too Large',
 550                                 414 => 'Request-URI Too Large',
 551                                 415 => 'Unsupported Media Type',
 552                                 416 => 'Request Range Not Satisfiable',
 553                                 417 => 'Expectation Failed',
 554                                 422 => 'Unprocessable Entity',
 555                                 423 => 'Locked',
 556                                 424 => 'Failed Dependency',
 557                                 500 => 'Internal Server Error',
 558                                 501 => 'Not Implemented',
 559                                 502 => 'Bad Gateway',
 560                                 503 => 'Service Unavailable',
 561                                 504 => 'Gateway Timeout',
 562                                 505 => 'HTTP Version Not Supported',
 563                                 507 => 'Insufficient Storage'
 564                         );
 565
 566                         if ( $statusMessage[$this->mStatusCode] )
 567                                 header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 568                 }
 569
 570                 # Buffer output; final headers may depend on later processing
 571                 ob_start();
 572
 573                 # Disable temporary placeholders, so that the skin produces HTML
 574                 $sk->postParseLinkColour( false );
 575
 576                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 577                 header( 'Content-language: '.$wgContLanguageCode );
 578
 579                 if ($this->mArticleBodyOnly) {
 580                         $this->out($this->mBodytext);
 581                 } else {
 582                         wfProfileIn( 'Output-skin' );
 583                         $sk->outputPage( $this );
 584                         wfProfileOut( 'Output-skin' );
 585                 }
 586
 587                 $this->sendCacheControl();
 588                 ob_end_flush();
 589                 wfProfileOut( $fname );
 590         }
 591
 592         function out( $ins ) {
 593                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 594                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 595                         $outs = $ins;
 596                 } else {
 597                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 598                         if ( false === $outs ) { $outs = $ins; }
 599                 }
 600                 print $outs;
 601         }
 602
 603         function setEncodings() {
 604                 global $wgInputEncoding, $wgOutputEncoding;
 605                 global $wgUser, $wgContLang;
 606
 607                 $wgInputEncoding = strtolower( $wgInputEncoding );
 608
 609                 if( $wgUser->getOption( 'altencoding' ) ) {
 610                         $wgContLang->setAltEncoding();
 611                         return;
 612                 }
 613
 614                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 615                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 616                         return;
 617                 }
 618                 $wgOutputEncoding = $wgInputEncoding;
 619         }
 620
 621         /**
 622          * Returns a HTML comment with the elapsed time since request.
 623          * This method has no side effects.
 624          * Use wfReportTime() instead.
 625          * @return string
 626          * @deprecated
 627          */
 628         function reportTime() {
 629                 $time = wfReportTime();
 630                 return $time;
 631         }
 632
 633         /**
 634          * Produce a "user is blocked" page
 635          */
 636         function blockedPage() {
 637                 global $wgUser, $wgContLang;
 638
 639                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 640                 $this->setRobotpolicy( 'noindex,nofollow' );
 641                 $this->setArticleRelated( false );
 642
 643                 $id = $wgUser->blockedBy();
 644                 $reason = $wgUser->blockedFor();
 645                 $ip = wfGetIP();
 646
 647                 if ( is_numeric( $id ) ) {
 648                         $name = User::whoIs( $id );
 649                 } else {
 650                         $name = $id;
 651                 }
 652                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 653
 654                 $this->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name ) );
 655                 $this->returnToMain( false );
 656         }
 657
 658         /**
 659          * Note: these arguments are keys into wfMsg(), not text!
 660          */
 661         function errorpage( $title, $msg ) {
 662                 global $wgTitle;
 663
 664                 $this->mDebugtext .= 'Original title: ' .
 665                   $wgTitle->getPrefixedText() . "\n";
 666                 $this->setPageTitle( wfMsg( $title ) );
 667                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 668                 $this->setRobotpolicy( 'noindex,nofollow' );
 669                 $this->setArticleRelated( false );
 670                 $this->enableClientCache( false );
 671                 $this->mRedirect = '';
 672
 673                 $this->mBodytext = '';
 674                 $this->addWikiText( wfMsg( $msg ) );
 675                 $this->returnToMain( false );
 676
 677                 $this->output();
 678                 wfErrorExit();
 679         }
 680
 681         /**
 682          * Display an error page indicating that a given version of MediaWiki is
 683          * required to use it
 684          *
 685          * @param mixed $version The version of MediaWiki needed to use the page
 686          */
 687         function versionRequired( $version ) {
 688                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 689                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 690                 $this->setRobotpolicy( 'noindex,nofollow' );
 691                 $this->setArticleRelated( false );
 692                 $this->mBodytext = '';
 693
 694                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 695                 $this->returnToMain();
 696         }
 697
 698         /**
 699          * Display an error page noting that a given permission bit is required.
 700          * This should generally replace the sysopRequired, developerRequired etc.
 701          * @param string $permission key required
 702          */
 703         function permissionRequired( $permission ) {
 704                 global $wgUser;
 705
 706                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 707                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 708                 $this->setRobotpolicy( 'noindex,nofollow' );
 709                 $this->setArticleRelated( false );
 710                 $this->mBodytext = '';
 711
 712                 $sk = $wgUser->getSkin();
 713                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ) );
 714                 $this->addHTML( wfMsgHtml( 'badaccesstext', $ap, $permission ) );
 715                 $this->returnToMain();
 716         }
 717
 718         /**
 719          * @deprecated
 720          */
 721         function sysopRequired() {
 722                 global $wgUser;
 723
 724                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 725                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 726                 $this->setRobotpolicy( 'noindex,nofollow' );
 727                 $this->setArticleRelated( false );
 728                 $this->mBodytext = '';
 729
 730                 $sk = $wgUser->getSkin();
 731                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 732                 $this->addHTML( wfMsgHtml( 'sysoptext', $ap ) );
 733                 $this->returnToMain();
 734         }
 735
 736         /**
 737          * @deprecated
 738          */
 739         function developerRequired() {
 740                 global $wgUser;
 741
 742                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 743                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 744                 $this->setRobotpolicy( 'noindex,nofollow' );
 745                 $this->setArticleRelated( false );
 746                 $this->mBodytext = '';
 747
 748                 $sk = $wgUser->getSkin();
 749                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 750                 $this->addHTML( wfMsgHtml( 'developertext', $ap ) );
 751                 $this->returnToMain();
 752         }
 753
 754         function loginToUse() {
 755                 global $wgUser, $wgTitle, $wgContLang;
 756
 757                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 758                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 759                 $this->setRobotpolicy( 'noindex,nofollow' );
 760                 $this->setArticleFlag( false );
 761                 $this->mBodytext = '';
 762                 $loginpage = Title::makeTitle(NS_SPECIAL, 'Userlogin');
 763                 $sk = $wgUser->getSkin();
 764                 $loginlink = $sk->makeKnownLinkObj($loginpage, wfMsg('loginreqlink'),
 765                         'returnto=' . htmlspecialchars($wgTitle->getPrefixedDBkey()));
 766                 $this->addHTML( wfMsgHtml( 'loginreqpagetext', $loginlink ) );
 767
 768                 # We put a comment in the .html file so a Sysop can diagnose the page the
 769                 # user can't see.
 770                 $this->addHTML( "\n<!--" .
 771                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 772                                                 ':' .
 773                                                 $wgTitle->getDBkey() . '-->' );
 774                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 775         }
 776
 777         function databaseError( $fname, $sql, $error, $errno ) {
 778                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 779
 780                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 781                 $this->setRobotpolicy( 'noindex,nofollow' );
 782                 $this->setArticleRelated( false );
 783                 $this->enableClientCache( false );
 784                 $this->mRedirect = '';
 785
 786                 if( !$wgShowSQLErrors ) {
 787                         $sql = wfMsg( 'sqlhidden' );
 788                 }
 789
 790                 if ( $wgCommandLineMode ) {
 791                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 792                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 793                 } else {
 794                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 795                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 796                 }
 797
 798                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 799                         print $msg."\n";
 800                         wfErrorExit();
 801                 }
 802                 $this->mBodytext = $msg;
 803                 $this->output();
 804                 wfErrorExit();
 805         }
 806
 807         function readOnlyPage( $source = null, $protected = false ) {
 808                 global $wgUser, $wgReadOnlyFile, $wgReadOnly, $wgTitle;
 809
 810                 $this->setRobotpolicy( 'noindex,nofollow' );
 811                 $this->setArticleRelated( false );
 812
 813                 if( $protected ) {
 814                         $skin = $wgUser->getSkin();
 815                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 816                         $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
 817
 818                         # Determine if protection is due to the page being a system message
 819                         # and show an appropriate explanation
 820                         if( $wgTitle->getNamespace() == NS_MEDIAWIKI && !$wgUser->isAllowed( 'editinterface' ) ) {
 821                                 $this->addWikiText( wfMsg( 'protectedinterface' ) );
 822                         } else {
 823                                 $this->addWikiText( wfMsg( 'protectedtext' ) );
 824                         }
 825                 } else {
 826                         $this->setPageTitle( wfMsg( 'readonly' ) );
 827                         if ( $wgReadOnly ) {
 828                                 $reason = $wgReadOnly;
 829                         } else {
 830                                 $reason = file_get_contents( $wgReadOnlyFile );
 831                         }
 832                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 833                 }
 834
 835                 if( is_string( $source ) ) {
 836                         if( strcmp( $source, '' ) == 0 ) {
 837                                 global $wgTitle;
 838                                 if ( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
 839                                         $source = wfMsgWeirdKey ( $wgTitle->getText() );
 840                                 } else {
 841                                         $source = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 842                                 }
 843                         }
 844                         $rows = $wgUser->getOption( 'rows' );
 845                         $cols = $wgUser->getOption( 'cols' );
 846
 847                         $text = "\n<textarea name='wpTextbox1' id='wpTextbox1' cols='$cols' rows='$rows' readonly='readonly'>" .
 848                                 htmlspecialchars( $source ) . "\n</textarea>";
 849                         $this->addHTML( $text );
 850                 }
 851
 852                 $this->returnToMain( false );
 853         }
 854
 855         function fatalError( $message ) {
 856                 $this->setPageTitle( wfMsg( "internalerror" ) );
 857                 $this->setRobotpolicy( "noindex,nofollow" );
 858                 $this->setArticleRelated( false );
 859                 $this->enableClientCache( false );
 860                 $this->mRedirect = '';
 861
 862                 $this->mBodytext = $message;
 863                 $this->output();
 864                 wfErrorExit();
 865         }
 866
 867         function unexpectedValueError( $name, $val ) {
 868                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 869         }
 870
 871         function fileCopyError( $old, $new ) {
 872                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 873         }
 874
 875         function fileRenameError( $old, $new ) {
 876                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 877         }
 878
 879         function fileDeleteError( $name ) {
 880                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 881         }
 882
 883         function fileNotFoundError( $name ) {
 884                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 885         }
 886
 887         /**
 888          * return from error messages or notes
 889          * @param $auto automatically redirect the user after 10 seconds
 890          * @param $returnto page title to return to. Default is Main Page.
 891          */
 892         function returnToMain( $auto = true, $returnto = NULL ) {
 893                 global $wgUser, $wgOut, $wgRequest;
 894
 895                 if ( $returnto == NULL ) {
 896                         $returnto = $wgRequest->getText( 'returnto' );
 897                 }
 898                 $returnto = htmlspecialchars( $returnto );
 899
 900                 $sk = $wgUser->getSkin();
 901                 if ( '' == $returnto ) {
 902                         $returnto = wfMsgForContent( 'mainpage' );
 903                 }
 904                 $link = $sk->makeLinkObj( Title::newFromText( $returnto ), '' );
 905
 906                 $r = wfMsg( 'returnto', $link );
 907                 if ( $auto ) {
 908                         $titleObj = Title::newFromText( $returnto );
 909                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 910                 }
 911                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 912         }
 913
 914         /**
 915          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
 916          * and uses the first 10 of them for META keywords
 917          */
 918         function addKeywords( &$parserOutput ) {
 919                 global $wgTitle;
 920                 $this->addKeyword( $wgTitle->getPrefixedText() );
 921                 $count = 1;
 922                 $links2d =& $parserOutput->getLinks();
 923                 if ( !is_array( $links2d ) ) {
 924                         return;
 925                 }
 926                 foreach ( $links2d as $ns => $dbkeys ) {
 927                         foreach( $dbkeys as $dbkey => $id ) {
 928                                 $this->addKeyword( $dbkey );
 929                                 if ( ++$count > 10 ) {
 930                                         break 2;
 931                                 }
 932                         }
 933                 }
 934         }
 935
 936         /**
 937          * @access private
 938          * @return string
 939          */
 940         function headElement() {
 941                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 942                 global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle;
 943
 944                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 945                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 946                 } else {
 947                         $ret = '';
 948                 }
 949
 950                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 951
 952                 if ( '' == $this->getHTMLTitle() ) {
 953                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
 954                 }
 955
 956                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 957                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 958                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
 959                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 960
 961                 $ret .= $this->getHeadLinks();
 962                 global $wgStylePath;
 963                 if( $this->isPrintable() ) {
 964                         $media = '';
 965                 } else {
 966                         $media = "media='print'";
 967                 }
 968                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 969                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 970
 971                 $sk = $wgUser->getSkin();
 972                 $ret .= $sk->getHeadScripts();
 973                 $ret .= $this->mScripts;
 974                 $ret .= $sk->getUserStyles();
 975
 976                 if ($wgUseTrackbacks && $this->isArticleRelated())
 977                         $ret .= $wgTitle->trackbackRDF();
 978
 979                 $ret .= "</head>\n";
 980                 return $ret;
 981         }
 982
 983         function getHeadLinks() {
 984                 global $wgRequest;
 985                 $ret = '';
 986                 foreach ( $this->mMetatags as $tag ) {
 987                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 988                                 $a = 'http-equiv';
 989                                 $tag[0] = substr( $tag[0], 5 );
 990                         } else {
 991                                 $a = 'name';
 992                         }
 993                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 994                 }
 995
 996                 $p = $this->mRobotpolicy;
 997                 if( $p !== '' && $p != 'index,follow' ) {
 998                         // http://www.robotstxt.org/wc/meta-user.html
 999                         // Only show if it's different from the default robots policy
1000                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
1001                 }
1002
1003                 if ( count( $this->mKeywords ) > 0 ) {
1004                         $strip = array(
1005                                 "/<.*?>/" => '',
1006                                 "/_/" => ' '
1007                         );
1008                         $ret .= "<meta name=\"keywords\" content=\"" .
1009                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
1010                 }
1011                 foreach ( $this->mLinktags as $tag ) {
1012                         $ret .= '<link';
1013                         foreach( $tag as $attr => $val ) {
1014                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
1015                         }
1016                         $ret .= " />\n";
1017                 }
1018                 if( $this->isSyndicated() ) {
1019                         # FIXME: centralize the mime-type and name information in Feed.php
1020                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
1021                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
1022                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
1023                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 0.3' href='$link' />\n";
1024                 }
1025
1026                 return $ret;
1027         }
1028
1029         /**
1030          * Turn off regular page output and return an error reponse
1031          * for when rate limiting has triggered.
1032          * @todo i18n
1033          * @access public
1034          */
1035         function rateLimited() {
1036                 global $wgOut;
1037                 $wgOut->disable();
1038                 wfHttpError( 500, 'Internal Server Error',
1039                         'Sorry, the server has encountered an internal error. ' .
1040                         'Please wait a moment and hit "refresh" to submit the request again.' );
1041         }
1042
1043 }
1044 ?>