Added check for newlines in redirects as a paranoia guard against header injection...
[lhc/web/wiklou.git] / includes / OutputPage.php
index 8ebde39..2816a34 100644 (file)
@@ -1,28 +1,21 @@
 <?php
+if ( ! defined( 'MEDIAWIKI' ) )
+       die( 1 );
 /**
  * @package MediaWiki
  */
 
-/**
- * This is not a valid entry point, perform no further processing unless MEDIAWIKI is defined
- */
-if( defined( 'MEDIAWIKI' ) ) {
-
-# See design.txt
-
-if($wgUseTeX) require_once( 'Math.php' );
-
 /**
  * @todo document
  * @package MediaWiki
  */
 class OutputPage {
-       var $mHeaders, $mCookies, $mMetatags, $mKeywords;
+       var $mMetatags, $mKeywords;
        var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
        var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
-       var $mSubtitle, $mRedirect;
+       var $mSubtitle, $mRedirect, $mStatusCode;
        var $mLastModified, $mETag, $mCategoryLinks;
-       var $mScripts, $mLinkColours;
+       var $mScripts, $mLinkColours, $mPageLinkTitle;
 
        var $mSuppressQuickbar;
        var $mOnloadHandler;
@@ -33,33 +26,41 @@ class OutputPage {
        var $mShowFeedLinks = false;
        var $mEnableClientCache = true;
        var $mArticleBodyOnly = false;
+       
+       var $mNewSectionLink = false;
+       var $mNoGallery = false;
 
        /**
         * Constructor
         * Initialise private variables
         */
        function OutputPage() {
-               $this->mHeaders = $this->mCookies = $this->mMetatags =
-               $this->mKeywords = $this->mLinktags = array();
+               $this->mMetatags = $this->mKeywords = $this->mLinktags = array();
                $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
                $this->mRedirect = $this->mLastModified =
                $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
-               $this->mOnloadHandler = '';
+               $this->mOnloadHandler = $this->mPageLinkTitle = '';
                $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
                $this->mSuppressQuickbar = $this->mPrintable = false;
                $this->mLanguageLinks = array();
-               $this->mCategoryLinks = array() ;
+               $this->mCategoryLinks = array();
                $this->mDoNothing = false;
                $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
                $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
                $this->mSquidMaxage = 0;
                $this->mScripts = '';
                $this->mETag = false;
+               $this->mRevisionId = null;
+               $this->mNewSectionLink = false;
+       }
+       
+       function redirect( $url, $responsecode = '302' ) { 
+               # Strip newlines as a paranoia check for header injection in PHP<5.1.2
+               $this->mRedirect = str_replace( "\n", '', $url );
+               $this->mRedirectCode = $responsecode;
        }
 
-       function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
-       function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
-       function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
+       function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
 
        # To add an http-equiv meta tag, precede the name with "http:"
        function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
@@ -91,22 +92,24 @@ class OutputPage {
         * returns true iff cache-ok headers was sent.
         */
        function checkLastModified ( $timestamp ) {
-               global $wgLang, $wgCachePages, $wgUser;
+               global $wgCachePages, $wgCacheEpoch, $wgUser;
+               $fname = 'OutputPage::checkLastModified';
+
                if ( !$timestamp || $timestamp == '19700101000000' ) {
-                       wfDebug( "CACHE DISABLED, NO TIMESTAMP\n" );
+                       wfDebug( "$fname: CACHE DISABLED, NO TIMESTAMP\n" );
                        return;
                }
                if( !$wgCachePages ) {
-                       wfDebug( "CACHE DISABLED\n", false );
+                       wfDebug( "$fname: CACHE DISABLED\n", false );
                        return;
                }
                if( $wgUser->getOption( 'nocache' ) ) {
-                       wfDebug( "USER DISABLED CACHE\n", false );
+                       wfDebug( "$fname: USER DISABLED CACHE\n", false );
                        return;
                }
 
                $timestamp=wfTimestamp(TS_MW,$timestamp);
-               $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
+               $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched, $wgCacheEpoch ) );
 
                if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
                        # IE sends sizes after the date like this:
@@ -115,23 +118,23 @@ class OutputPage {
                        $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
                        $modsinceTime = strtotime( $modsince );
                        $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
-                       wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
-                       wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
-                       if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) ) {
+                       wfDebug( "$fname: -- client send If-Modified-Since: " . $modsince . "\n", false );
+                       wfDebug( "$fname: --  we might send Last-Modified : $lastmod\n", false );
+                       if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) && $ismodsince >= $wgCacheEpoch ) {
                                # Make sure you're in a place you can leave when you call us!
                                header( "HTTP/1.0 304 Not Modified" );
                                $this->mLastModified = $lastmod;
                                $this->sendCacheControl();
-                               wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
+                               wfDebug( "$fname: CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
                                $this->disable();
                                @ob_end_clean(); // Don't output compressed blob
                                return true;
                        } else {
-                               wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
+                               wfDebug( "$fname: READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp ; site $wgCacheEpoch\n", false );
                                $this->mLastModified = $lastmod;
                        }
                } else {
-                       wfDebug( "client did not send If-Modified-Since header\n", false );
+                       wfDebug( "$fname: client did not send If-Modified-Since header\n", false );
                        $this->mLastModified = $lastmod;
                }
        }
@@ -140,20 +143,17 @@ class OutputPage {
                global $action;
                switch($action) {
                        case 'edit':
-                               return wfMsg('edit');
-                       case 'history':
-                               return wfMsg('history_short');
+                       case 'delete':
                        case 'protect':
-                               return wfMsg('protect');
                        case 'unprotect':
-                               return wfMsg('unprotect');
-                       case 'delete':
-                               return wfMsg('delete');
                        case 'watch':
-                               return wfMsg('watch');
                        case 'unwatch':
-                               return wfMsg('unwatch');
+                               // Display title is already customized
+                               return '';
+                       case 'history':
+                               return wfMsg('history_short');
                        case 'submit':
+                               // FIXME: bug 2735; not correct for special pages etc
                                return wfMsg('preview');
                        case 'info':
                                return wfMsg('info_short');
@@ -174,7 +174,8 @@ class OutputPage {
                                $name .= ' - '.$taction;
                        }
                }
-               $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
+
+               $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
        }
        function getHTMLTitle() { return $this->mHTMLtitle; }
        function getPageTitle() { return $this->mPagetitle; }
@@ -215,11 +216,33 @@ class OutputPage {
        function getCategoryLinks() {
                return $this->mCategoryLinks;
        }
-       function addCategoryLinks($newLinkArray) {
-               $this->mCategoryLinks += $newLinkArray;
+
+       /**
+        * Add an array of categories, with names in the keys
+        */
+       function addCategoryLinks($categories) {
+               global $wgUser, $wgContLang;
+
+               if ( !is_array( $categories ) ) {
+                       return;
+               }
+               # Add the links to the link cache in a batch
+               $arr = array( NS_CATEGORY => $categories );
+               $lb = new LinkBatch;
+               $lb->setArray( $arr );
+               $lb->execute();
+
+               $sk =& $wgUser->getSkin();
+               foreach ( $categories as $category => $arbitrary ) {
+                       $title = Title::makeTitleSafe( NS_CATEGORY, $category );
+                       $text = $wgContLang->convertHtml( $title->getText() );
+                       $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
+               }
        }
-       function setCategoryLinks($newLinkArray) {
-               $this->mCategoryLinks += $newLinkArray;
+
+       function setCategoryLinks($categories) {
+               $this->mCategoryLinks = array();
+               $this->addCategoryLinks($categories);
        }
 
        function suppressQuickbar() { $this->mSuppressQuickbar = true; }
@@ -230,10 +253,26 @@ class OutputPage {
        function getHTML() { return $this->mBodytext; }
        function debug( $text ) { $this->mDebugtext .= $text; }
 
+       /* @deprecated */
        function setParserOptions( $options ) {
+               return $this->ParserOptions( $options );
+       }
+
+       function ParserOptions( $options = null ) {
                return wfSetVar( $this->mParserOptions, $options );
        }
 
+       /**
+        * Set the revision ID which will be seen by the wiki text parser
+        * for things such as embedded {{REVISIONID}} variable use.
+        * @param mixed $revid an integer, or NULL
+        * @return mixed previous value
+        */
+       function setRevisionId( $revid ) {
+               $val = is_null( $revid ) ? null : intval( $revid );
+               return wfSetVar( $this->mRevisionId, $val );
+       }
+
        /**
         * Convert wikitext to HTML and add it to the buffer
         * Default assumes that the current page title will
@@ -249,13 +288,28 @@ class OutputPage {
        }
 
        function addWikiTextTitle($text, &$title, $linestart) {
-               global $wgParser, $wgUseTidy;
-               $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions, $linestart );
+               global $wgParser;
+               $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions,
+                       $linestart, true, $this->mRevisionId );
+               $this->addParserOutput( $parserOutput );
+       }
+
+       function addParserOutputNoText( &$parserOutput ) {
                $this->mLanguageLinks += $parserOutput->getLanguageLinks();
-               $this->mCategoryLinks += $parserOutput->getCategoryLinks();
+               $this->addCategoryLinks( $parserOutput->getCategories() );
+               $this->mNewSectionLink = $parserOutput->getNewSection();
+               $this->addKeywords( $parserOutput );
                if ( $parserOutput->getCacheTime() == -1 ) {
                        $this->enableClientCache( false );
                }
+               if ( $parserOutput->mHTMLtitle != "" ) {
+                       $this->mPagetitle = $parserOutput->mHTMLtitle ;
+                       $this->mSubtitle .= $parserOutput->mSubtitle ;
+               }
+       }
+
+       function addParserOutput( &$parserOutput ) {
+               $this->addParserOutputNoText( $parserOutput );
                $this->addHTML( $parserOutput->getText() );
        }
 
@@ -263,25 +317,37 @@ class OutputPage {
         * Add wikitext to the buffer, assuming that this is the primary text for a page view
         * Saves the text into the parser cache if possible
         */
-       function addPrimaryWikiText( $text, $cacheArticle ) {
-               global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
-
-               $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
-
-               $text = $parserOutput->getText();
-
-               if ( $cacheArticle && $parserOutput->getCacheTime() != -1 ) {
-                       $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
+       function addPrimaryWikiText( $text, $article, $cache = true ) {
+               global $wgParser, $wgUser;
+
+               $this->mParserOptions->setTidy(true);
+               $parserOutput = $wgParser->parse( $text, $article->mTitle,
+                       $this->mParserOptions, true, true, $this->mRevisionId );
+               $this->mParserOptions->setTidy(false);
+               if ( $cache && $article && $parserOutput->getCacheTime() != -1 ) {
+                       $parserCache =& ParserCache::singleton();
+                       $parserCache->save( $parserOutput, $article, $wgUser );
                }
 
-               $this->mLanguageLinks += $parserOutput->getLanguageLinks();
-               $this->mCategoryLinks += $parserOutput->getCategoryLinks();
-               if ( $parserOutput->getCacheTime() == -1 ) {
-                       $this->enableClientCache( false );
-               }
-               $this->addHTML( $text );
+               $this->addParserOutputNoText( $parserOutput );
+               $text = $parserOutput->getText();
+               $this->mNoGallery = $parserOutput->getNoGallery();
+               wfRunHooks( 'OutputPageBeforeHTML',array( &$this, &$text ) );
+               $parserOutput->setText( $text );
+               $this->addHTML( $parserOutput->getText() );
        }
 
+       /**
+        * For anything that isn't primary text or interface message
+        */
+       function addSecondaryWikiText( $text, $linestart = true ) {
+               global $wgTitle;
+               $this->mParserOptions->setTidy(true);
+               $this->addWikiTextTitle($text, $wgTitle, $linestart);
+               $this->mParserOptions->setTidy(false);
+       }
+
+
        /**
         * Add the output of a QuickTemplate to the output buffer
         * @param QuickTemplate $template
@@ -289,16 +355,19 @@ class OutputPage {
        function addTemplate( &$template ) {
                ob_start();
                $template->execute();
-               $this->addHtml( ob_get_contents() );
+               $this->addHTML( ob_get_contents() );
                ob_end_clean();
        }
 
        /**
-        * Parse wikitext and return the HTML. This is for special pages that add the text later
+        * Parse wikitext and return the HTML.
         */
-       function parse( $text, $linestart = true ) {
+       function parse( $text, $linestart = true, $interface = false ) {
                global $wgParser, $wgTitle;
-               $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
+               if ( $interface) { $this->mParserOptions->setInterfaceMessage(true); }
+               $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions,
+                       $linestart, true, $this->mRevisionId );
+               if ( $interface) { $this->mParserOptions->setInterfaceMessage(false); }
                return $parserOutput->getText();
        }
 
@@ -308,13 +377,18 @@ class OutputPage {
         *
         * @return bool
         */
-       function tryParserCache( $article, $user ) {
-               global $wgParserCache;
-               $parserOutput = $wgParserCache->get( $article, $user );
+       function tryParserCache( &$article, $user ) {
+               $parserCache =& ParserCache::singleton();
+               $parserOutput = $parserCache->get( $article, $user );
                if ( $parserOutput !== false ) {
                        $this->mLanguageLinks += $parserOutput->getLanguageLinks();
-                       $this->mCategoryLinks += $parserOutput->getCategoryLinks();
-                       $this->addHTML( $parserOutput->getText() );
+                       $this->addCategoryLinks( $parserOutput->getCategories() );
+                       $this->addKeywords( $parserOutput );
+                       $this->mNewSectionLink = $parserOutput->getNewSection();
+                       $this->mNoGallery = $parserOutput->getNoGallery();
+                       $text = $parserOutput->getText();
+                       wfRunHooks( 'OutputPageBeforeHTML', array( &$this, &$text ) );
+                       $this->addHTML( $text );
                        $t = $parserOutput->getTitleText();
                        if( !empty( $t ) ) {
                                $this->setPageTitle( $t );
@@ -341,8 +415,15 @@ class OutputPage {
                return wfSetVar( $this->mEnableClientCache, $state );
        }
 
+       function uncacheableBecauseRequestvars() {
+               global $wgRequest;
+               return  $wgRequest->getText('useskin', false) === false
+                       && $wgRequest->getText('uselang', false) === false;
+       }
+
        function sendCacheControl() {
-               global $wgUseSquid, $wgUseESI;
+               global $wgUseSquid, $wgUseESI, $wgSquidMaxage;
+               $fname = 'OutputPage::sendCacheControl';
 
                if ($this->mETag)
                        header("ETag: $this->mETag");
@@ -350,7 +431,7 @@ class OutputPage {
                # don't serve compressed data to clients who can't handle it
                # maintain different caches for logged-in users and non-logged in ones
                header( 'Vary: Accept-Encoding, Cookie' );
-               if( $this->mEnableClientCache ) {
+               if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
                        if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
                          ! $this->isPrintable() && $this->mSquidMaxage != 0 )
                        {
@@ -358,7 +439,7 @@ class OutputPage {
                                        # We'll purge the proxy cache explicitly, but require end user agents
                                        # to revalidate against the proxy on each visit.
                                        # Surrogate-Control controls our Squid, Cache-Control downstream caches
-                                       wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
+                                       wfDebug( "$fname: proxy caching with ESI; {$this->mLastModified} **\n", false );
                                        # start with a shorter timeout for initial testing
                                        # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
                                        header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
@@ -368,7 +449,7 @@ class OutputPage {
                                        # to revalidate against the proxy on each visit.
                                        # IMPORTANT! The Squid needs to replace the Cache-Control header with
                                        # Cache-Control: s-maxage=0, must-revalidate, max-age=0
-                                       wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
+                                       wfDebug( "$fname: local proxy caching; {$this->mLastModified} **\n", false );
                                        # start with a shorter timeout for initial testing
                                        # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
                                        header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
@@ -376,17 +457,17 @@ class OutputPage {
                        } else {
                                # We do want clients to cache if they can, but they *must* check for updates
                                # on revisiting the page.
-                               wfDebug( "** private caching; {$this->mLastModified} **\n", false );
-                               header( "Expires: -1" );
+                               wfDebug( "$fname: private caching; {$this->mLastModified} **\n", false );
+                               header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
                                header( "Cache-Control: private, must-revalidate, max-age=0" );
                        }
                        if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
                } else {
-                       wfDebug( "** no caching **\n", false );
+                       wfDebug( "$fname: no caching **\n", false );
 
                        # In general, the absence of a last modified header should be enough to prevent
                        # the client from using its cache. We send a few other things just to make sure.
-                       header( 'Expires: -1' );
+                       header( 'Expires: ' . gmdate( 'D, d M Y H:i:s', 0 ) . ' GMT' );
                        header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
                        header( 'Pragma: no-cache' );
                }
@@ -397,9 +478,9 @@ class OutputPage {
         * the object, let's actually output it:
         */
        function output() {
-               global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
-               global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
-               global $wgDebugRedirects, $wgMimeType, $wgProfiler;
+               global $wgUser, $wgOutputEncoding;
+               global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType;
+               global $wgJsMimeType, $wgStylePath, $wgUseAjax, $wgScriptPath, $wgServer;
 
                if( $this->mDoNothing ){
                        return;
@@ -408,6 +489,14 @@ class OutputPage {
                wfProfileIn( $fname );
                $sk = $wgUser->getSkin();
 
+               if ( $wgUseAjax ) {
+                       $this->addScript( "<script type=\"{$wgJsMimeType}\">
+                               var wgScriptPath=\"{$wgScriptPath}\";
+                               var wgServer=\"{$wgServer}\";
+                       </script>" );
+                       $this->addScript( "<script type=\"{$wgJsMimeType}\" src=\"{$wgStylePath}/common/ajax.js\"></script>\n" );
+               }
+
                if ( '' != $this->mRedirect ) {
                        if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
                                # Standards require redirect URLs to be absolute
@@ -431,27 +520,73 @@ class OutputPage {
                        } else {
                                header( 'Location: '.$this->mRedirect );
                        }
-                       if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
+                       wfProfileOut( $fname );
                        return;
                }
+               elseif ( $this->mStatusCode )
+               {
+                       $statusMessage = array(
+                               100 => 'Continue',
+                               101 => 'Switching Protocols',
+                               102 => 'Processing',
+                               200 => 'OK',
+                               201 => 'Created',
+                               202 => 'Accepted',
+                               203 => 'Non-Authoritative Information',
+                               204 => 'No Content',
+                               205 => 'Reset Content',
+                               206 => 'Partial Content',
+                               207 => 'Multi-Status',
+                               300 => 'Multiple Choices',
+                               301 => 'Moved Permanently',
+                               302 => 'Found',
+                               303 => 'See Other',
+                               304 => 'Not Modified',
+                               305 => 'Use Proxy',
+                               307 => 'Temporary Redirect',
+                               400 => 'Bad Request',
+                               401 => 'Unauthorized',
+                               402 => 'Payment Required',
+                               403 => 'Forbidden',
+                               404 => 'Not Found',
+                               405 => 'Method Not Allowed',
+                               406 => 'Not Acceptable',
+                               407 => 'Proxy Authentication Required',
+                               408 => 'Request Timeout',
+                               409 => 'Conflict',
+                               410 => 'Gone',
+                               411 => 'Length Required',
+                               412 => 'Precondition Failed',
+                               413 => 'Request Entity Too Large',
+                               414 => 'Request-URI Too Large',
+                               415 => 'Unsupported Media Type',
+                               416 => 'Request Range Not Satisfiable',
+                               417 => 'Expectation Failed',
+                               422 => 'Unprocessable Entity',
+                               423 => 'Locked',
+                               424 => 'Failed Dependency',
+                               500 => 'Internal Server Error',
+                               501 => 'Not Implemented',
+                               502 => 'Bad Gateway',
+                               503 => 'Service Unavailable',
+                               504 => 'Gateway Timeout',
+                               505 => 'HTTP Version Not Supported',
+                               507 => 'Insufficient Storage'
+                       );
 
+                       if ( $statusMessage[$this->mStatusCode] )
+                               header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
+               }
 
                # Buffer output; final headers may depend on later processing
                ob_start();
 
-               $this->transformBuffer();
-
                # Disable temporary placeholders, so that the skin produces HTML
                $sk->postParseLinkColour( false );
 
                header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
                header( 'Content-language: '.$wgContLanguageCode );
 
-               $exp = time() + $wgCookieExpiration;
-               foreach( $this->mCookies as $name => $val ) {
-                       setcookie( $name, $val, $exp, '/' );
-               }
-
                if ($this->mArticleBodyOnly) {
                        $this->out($this->mBodytext);
                } else {
@@ -462,6 +597,7 @@ class OutputPage {
 
                $this->sendCacheControl();
                ob_end_flush();
+               wfProfileOut( $fname );
        }
 
        function out( $ins ) {
@@ -496,38 +632,47 @@ class OutputPage {
        /**
         * Returns a HTML comment with the elapsed time since request.
         * This method has no side effects.
+        * Use wfReportTime() instead.
         * @return string
+        * @deprecated
         */
        function reportTime() {
-               global $wgRequestTime;
+               $time = wfReportTime();
+               return $time;
+       }
 
-               $now = wfTime();
-               list( $usec, $sec ) = explode( ' ', $wgRequestTime );
-               $start = (float)$sec + (float)$usec;
-               $elapsed = $now - $start;
+       /**
+        * Produce a "user is blocked" page
+        */
+       function blockedPage() {
+               global $wgUser, $wgContLang, $wgTitle;
 
-               # Use real server name if available, so we know which machine
-               # in a server farm generated the current page.
-               if ( function_exists( 'posix_uname' ) ) {
-                       $uname = @posix_uname();
-               } else {
-                       $uname = false;
-               }
-               if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
-                       $hostname = $uname['nodename'];
+               $this->setPageTitle( wfMsg( 'blockedtitle' ) );
+               $this->setRobotpolicy( 'noindex,nofollow' );
+               $this->setArticleRelated( false );
+
+               $id = $wgUser->blockedBy();
+               $reason = $wgUser->blockedFor();
+               $ip = wfGetIP();
+
+               if ( is_numeric( $id ) ) {
+                       $name = User::whoIs( $id );
                } else {
-                       # This may be a virtual server.
-                       $hostname = $_SERVER['SERVER_NAME'];
+                       $name = $id;
                }
-               $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
-                 $hostname, $elapsed );
-               return $com;
+               $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
+
+               $this->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name ) );
+               
+               # Don't auto-return to special pages
+               $return = $wgTitle->getNamespace() > -1 ? $wgTitle->getPrefixedText() : NULL;   
+               $this->returnToMain( false, $return );
        }
 
        /**
         * Note: these arguments are keys into wfMsg(), not text!
         */
-       function errorpage( $title, $msg ) {
+       function showErrorPage( $title, $msg ) {
                global $wgTitle;
 
                $this->mDebugtext .= 'Original title: ' .
@@ -542,11 +687,13 @@ class OutputPage {
                $this->mBodytext = '';
                $this->addWikiText( wfMsg( $msg ) );
                $this->returnToMain( false );
-
-               $this->output();
-               wfErrorExit();
        }
 
+       /** @obsolete */
+       function errorpage( $title, $msg ) {
+               throw new ErrorPageError( $title, $msg );
+       }
+               
        /**
         * Display an error page indicating that a given version of MediaWiki is
         * required to use it
@@ -554,15 +701,12 @@ class OutputPage {
         * @param mixed $version The version of MediaWiki needed to use the page
         */
        function versionRequired( $version ) {
-               global $wgUser;
-
                $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
                $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
                $this->setRobotpolicy( 'noindex,nofollow' );
                $this->setArticleRelated( false );
                $this->mBodytext = '';
 
-               $sk = $wgUser->getSkin();
                $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
                $this->returnToMain();
        }
@@ -623,64 +767,49 @@ class OutputPage {
                $this->returnToMain();
        }
 
+       /**
+        * Produce the stock "please login to use the wiki" page
+        */
        function loginToUse() {
                global $wgUser, $wgTitle, $wgContLang;
-
+               $skin = $wgUser->getSkin();
+               
                $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
-               $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
-               $this->setRobotpolicy( 'noindex,nofollow' );
+               $this->setHtmlTitle( wfMsg( 'errorpagetitle' ) );
+               $this->setRobotPolicy( 'noindex,nofollow' );
                $this->setArticleFlag( false );
-               $this->mBodytext = '';
-               $this->addWikiText( wfMsg( 'loginreqtext' ) );
-
-               # We put a comment in the .html file so a Sysop can diagnose the page the
-               # user can't see.
-               $this->addHTML( "\n<!--" .
-                                               $wgContLang->getNsText( $wgTitle->getNamespace() ) .
-                                               ':' .
-                                               $wgTitle->getDBkey() . '-->' );
-               $this->returnToMain();          # Flip back to the main page after 10 seconds.
+               
+               $loginTitle = Title::makeTitle( NS_SPECIAL, 'Userlogin' );
+               $loginLink = $skin->makeKnownLinkObj( $loginTitle, wfMsgHtml( 'loginreqlink' ), 'returnto=' . $wgTitle->getPrefixedUrl() );
+               $this->addHtml( wfMsgWikiHtml( 'loginreqpagetext', $loginLink ) );
+               $this->addHtml( "\n<!--" . $wgTitle->getPrefixedUrl() . "-->" );
+               
+               $this->returnToMain();
        }
 
+       /** @obsolete */
        function databaseError( $fname, $sql, $error, $errno ) {
-               global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
-
-               $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
-               $this->setRobotpolicy( 'noindex,nofollow' );
-               $this->setArticleRelated( false );
-               $this->enableClientCache( false );
-               $this->mRedirect = '';
-
-               if( !$wgShowSQLErrors ) {
-                       $sql = wfMsg( 'sqlhidden' );
-               }
-
-               if ( $wgCommandLineMode ) {
-                       $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
-                                               htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
-               } else {
-                       $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
-                                               htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
-               }
-
-               if ( $wgCommandLineMode || !is_object( $wgUser )) {
-                       print $msg."\n";
-                       wfErrorExit();
-               }
-               $this->mBodytext = $msg;
-               $this->output();
-               wfErrorExit();
+               throw new MWException( "OutputPage::databaseError is obsolete\n" );
        }
 
        function readOnlyPage( $source = null, $protected = false ) {
-               global $wgUser, $wgReadOnlyFile, $wgReadOnly;
+               global $wgUser, $wgReadOnlyFile, $wgReadOnly, $wgTitle;
 
                $this->setRobotpolicy( 'noindex,nofollow' );
                $this->setArticleRelated( false );
 
                if( $protected ) {
+                       $skin = $wgUser->getSkin();
                        $this->setPageTitle( wfMsg( 'viewsource' ) );
-                       $this->addWikiText( wfMsg( 'protectedtext' ) );
+                       $this->setSubtitle( wfMsg( 'viewsourcefor', $skin->makeKnownLinkObj( $wgTitle ) ) );
+                       
+                       # Determine if protection is due to the page being a system message
+                       # and show an appropriate explanation
+                       if( $wgTitle->getNamespace() == NS_MEDIAWIKI && !$wgUser->isAllowed( 'editinterface' ) ) {
+                               $this->addWikiText( wfMsg( 'protectedinterface' ) );
+                       } else {
+                               $this->addWikiText( wfMsg( 'protectedtext' ) );
+                       }
                } else {
                        $this->setPageTitle( wfMsg( 'readonly' ) );
                        if ( $wgReadOnly ) {
@@ -693,11 +822,17 @@ class OutputPage {
 
                if( is_string( $source ) ) {
                        if( strcmp( $source, '' ) == 0 ) {
-                               $source = wfMsg( 'noarticletext' );
+                               global $wgTitle;
+                               if ( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
+                                       $source = wfMsgWeirdKey ( $wgTitle->getText() );
+                               } else {
+                                       $source = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
+                               }
                        }
-                       $rows = $wgUser->getOption( 'rows' );
-                       $cols = $wgUser->getOption( 'cols' );
-                       $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
+                       $rows = $wgUser->getIntOption( 'rows' );
+                       $cols = $wgUser->getIntOption( 'cols' );
+                       
+                       $text = "\n<textarea name='wpTextbox1' id='wpTextbox1' cols='$cols' rows='$rows' readonly='readonly'>" .
                                htmlspecialchars( $source ) . "\n</textarea>";
                        $this->addHTML( $text );
                }
@@ -705,36 +840,63 @@ class OutputPage {
                $this->returnToMain( false );
        }
 
-       function fatalError( $message ) {
+       /** @obsolete */
+       function fatalError( $message ) { 
+               throw new FatalError( $message ); 
+       }
+       
+       /** @obsolete */
+       function unexpectedValueError( $name, $val ) {
+               throw new FatalError( wfMsg( 'unexpected', $name, $val ) );
+       }
+
+       /** @obsolete */
+       function fileCopyError( $old, $new ) {
+               throw new FatalError( wfMsg( 'filecopyerror', $old, $new ) );
+       }
+
+       /** @obsolete */
+       function fileRenameError( $old, $new ) {
+               throw new FatalError( wfMsg( 'filerenameerror', $old, $new ) );
+       }
+
+       /** @obsolete */
+       function fileDeleteError( $name ) {
+               throw new FatalError( wfMsg( 'filedeleteerror', $name ) );
+       }
+
+       /** @obsolete */
+       function fileNotFoundError( $name ) {
+               throw new FatalError( wfMsg( 'filenotfound', $name ) );
+       }
+
+       function showFatalError( $message ) {
                $this->setPageTitle( wfMsg( "internalerror" ) );
                $this->setRobotpolicy( "noindex,nofollow" );
                $this->setArticleRelated( false );
                $this->enableClientCache( false );
                $this->mRedirect = '';
-
                $this->mBodytext = $message;
-               $this->output();
-               wfErrorExit();
        }
 
-       function unexpectedValueError( $name, $val ) {
-               $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
+       function showUnexpectedValueError( $name, $val ) {
+               $this->showFatalError( wfMsg( 'unexpected', $name, $val ) );
        }
 
-       function fileCopyError( $old, $new ) {
-               $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
+       function showFileCopyError( $old, $new ) {
+               $this->showFatalError( wfMsg( 'filecopyerror', $old, $new ) );
        }
 
-       function fileRenameError( $old, $new ) {
-               $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
+       function showFileRenameError( $old, $new ) {
+               $this->showFatalError( wfMsg( 'filerenameerror', $old, $new ) );
        }
 
-       function fileDeleteError( $name ) {
-               $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
+       function showFileDeleteError( $name ) {
+               $this->showFatalError( wfMsg( 'filedeleteerror', $name ) );
        }
 
-       function fileNotFoundError( $name ) {
-               $this->fatalError( wfMsg( 'filenotfound', $name ) );
+       function showFileNotFoundError( $name ) {
+               $this->showFatalError( wfMsg( 'filenotfound', $name ) );
        }
 
        /**
@@ -744,21 +906,26 @@ class OutputPage {
         */
        function returnToMain( $auto = true, $returnto = NULL ) {
                global $wgUser, $wgOut, $wgRequest;
-
+               
                if ( $returnto == NULL ) {
                        $returnto = $wgRequest->getText( 'returnto' );
                }
-               $returnto = htmlspecialchars( $returnto );
-
-               $sk = $wgUser->getSkin();
-               if ( '' == $returnto ) {
+               
+               if ( '' === $returnto ) {
                        $returnto = wfMsgForContent( 'mainpage' );
                }
-               $link = $sk->makeKnownLink( $returnto, '' );
+
+               if ( is_object( $returnto ) ) {
+                       $titleObj = $returnto;
+               } else {
+                       $titleObj = Title::newFromText( $returnto );
+               }
+
+               $sk = $wgUser->getSkin();
+               $link = $sk->makeLinkObj( $titleObj, '' );
 
                $r = wfMsg( 'returnto', $link );
                if ( $auto ) {
-                       $titleObj = Title::newFromText( $returnto );
                        $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
                }
                $wgOut->addHTML( "\n<p>$r</p>\n" );
@@ -768,30 +935,31 @@ class OutputPage {
         * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
         * and uses the first 10 of them for META keywords
         */
-       function addMetaTags () {
-               global $wgLinkCache , $wgOut ;
-               $categories = array_keys ( $wgLinkCache->mCategoryLinks ) ;
-               $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
-               $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
-               $a = array_merge ( array_slice ( $good , 0 , 1 ), $categories, array_slice ( $good , 1 , 9 ) , $bad ) ;
-               $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
-               $a = implode ( ',' , $a ) ;
-               $strip = array(
-                       "/<.*?>/" => '',
-                       "/_/" => ' '
-               );
-               $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
-
-               $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
+       function addKeywords( &$parserOutput ) {
+               global $wgTitle;
+               $this->addKeyword( $wgTitle->getPrefixedText() );
+               $count = 1;
+               $links2d =& $parserOutput->getLinks();
+               if ( !is_array( $links2d ) ) {
+                       return;
+               }
+               foreach ( $links2d as $ns => $dbkeys ) {
+                       foreach( $dbkeys as $dbkey => $id ) {
+                               $this->addKeyword( $dbkey );
+                               if ( ++$count > 10 ) {
+                                       break 2;
+                               }
+                       }
+               }
        }
 
        /**
-        * @private
+        * @access private
         * @return string
         */
        function headElement() {
                global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
-               global $wgUser, $wgContLang, $wgRequest, $wgUseTrackbacks, $wgTitle;
+               global $wgUser, $wgContLang, $wgUseTrackbacks, $wgTitle;
 
                if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
                        $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
@@ -801,13 +969,13 @@ class OutputPage {
 
                $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 
-               if ( "" == $this->mHTMLtitle ) {
-                       $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
+               if ( '' == $this->getHTMLTitle() ) {
+                       $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
                }
 
                $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
                $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
-               $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
+               $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
                array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 
                $ret .= $this->getHeadLinks();
@@ -833,7 +1001,7 @@ class OutputPage {
        }
 
        function getHeadLinks() {
-               global $wgRequest, $wgStylePath;
+               global $wgRequest;
                $ret = '';
                foreach ( $this->mMetatags as $tag ) {
                        if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
@@ -844,9 +1012,13 @@ class OutputPage {
                        }
                        $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
                }
+
                $p = $this->mRobotpolicy;
-               if ( '' == $p ) { $p = 'index,follow'; }
-               $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
+               if( $p !== '' && $p != 'index,follow' ) {
+                       // http://www.robotstxt.org/wc/meta-user.html
+                       // Only show if it's different from the default robots policy
+                       $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
+               }
 
                if ( count( $this->mKeywords ) > 0 ) {
                        $strip = array(
@@ -868,19 +1040,12 @@ class OutputPage {
                        $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
                        $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
                        $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
-                       $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
+                       $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 0.3' href='$link' />\n";
                }
 
                return $ret;
        }
 
-       /**
-        * Run any necessary pre-output transformations on the buffer text
-        */
-       function transformBuffer( $options = 0 ) {
-       }
-
-
        /**
         * Turn off regular page output and return an error reponse
         * for when rate limiting has triggered.
@@ -894,9 +1059,15 @@ class OutputPage {
                        'Sorry, the server has encountered an internal error. ' .
                        'Please wait a moment and hit "refresh" to submit the request again.' );
        }
+       
+       /**
+        * Show an "add new section" link?
+        *
+        * @return bool True if the parser output instructs us to add one
+        */
+       function showNewSectionLink() {
+               return $this->mNewSectionLink;
+       }
 
 }
-
-} // MediaWiki
-
 ?>