includes/OutputPage.php

   1 <?php
   2 /**
   3  * @version $Id$
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * This is not a valid entry point, perform no further processing unless MEDIAWIKI is defined
   9  */
  10 if( defined( 'MEDIAWIKI' ) ) {
  11
  12 # See design.doc
  13
  14 if($wgUseTeX) require_once( 'Math.php' );
  15
  16 define( 'RLH_FOR_UPDATE', 1 );
  17
  18 /**
  19  * @todo document
  20  * @package MediaWiki
  21  */
  22 class OutputPage {
  23         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
  24         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  25         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  26         var $mSubtitle, $mRedirect;
  27         var $mLastModified, $mCategoryLinks;
  28         var $mScripts, $mLinkColours;
  29
  30         var $mSuppressQuickbar;
  31         var $mOnloadHandler;
  32         var $mDoNothing;
  33         var $mContainsOldMagic, $mContainsNewMagic;
  34         var $mIsArticleRelated;
  35         var $mParserOptions;
  36         var $mShowFeedLinks = false;
  37         var $mEnableClientCache = true;
  38
  39         /**
  40          * Constructor
  41          * Initialise private variables
  42          */
  43         function OutputPage() {
  44                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  45                 $this->mKeywords = $this->mLinktags = array();
  46                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  47                 $this->mRedirect = $this->mLastModified =
  48                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  49                 $this->mOnloadHandler = '';
  50                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  51                 $this->mSuppressQuickbar = $this->mPrintable = false;
  52                 $this->mLanguageLinks = array();
  53                 $this->mCategoryLinks = array() ;
  54                 $this->mDoNothing = false;
  55                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  56                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  57                 $this->mSquidMaxage = 0;
  58                 $this->mScripts = '';
  59         }
  60
  61         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
  62         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  63         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  64
  65         # To add an http-equiv meta tag, precede the name with "http:"
  66         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  67         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  68         function addScript( $script ) { $this->mScripts .= $script; }
  69         function getScript() { return $this->mScripts; }
  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 $wgLang, $wgCachePages, $wgUser;
  92                 $timestamp=wfTimestamp(TS_MW,$timestamp);
  93                 if( !$wgCachePages ) {
  94                         wfDebug( "CACHE DISABLED\n", false );
  95                         return;
  96                 }
  97                 if( preg_match( '/MSIE ([1-4]|5\.0)/', $_SERVER["HTTP_USER_AGENT"] ) ) {
  98                         # IE 5.0 has probs with our caching
  99                         wfDebug( "-- bad client, not caching\n", false );
 100                         return;
 101                 }
 102                 if( $wgUser->getOption( 'nocache' ) ) {
 103                         wfDebug( "USER DISABLED CACHE\n", false );
 104                         return;
 105                 }
 106
 107                 $lastmod = gmdate( 'D, j M Y H:i:s', wfTimestamp(TS_UNIX, max( $timestamp, $wgUser->mTouched ) ) ) . ' GMT';
 108
 109                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 110                         # IE sends sizes after the date like this:
 111                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 112                         # this breaks strtotime().
 113                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 114                         $ismodsince = wfTimestamp( TS_MW, strtotime( $modsince ) );
 115                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 116                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 117                         if( ($ismodsince >= $timestamp ) and $wgUser->validateCache( $ismodsince ) ) {
 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\n", false );
 123                                 $this->disable();
 124                                 return true;
 125                         } else {
 126                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 127                                 $this->mLastModified = $lastmod;
 128                         }
 129                 } else {
 130                         wfDebug( "We're confused.\n", false );
 131                         $this->mLastModified = $lastmod;
 132                 }
 133         }
 134
 135         function getPageTitleActionText () {
 136                 global $action;
 137                 switch($action) {
 138                         case 'edit':
 139                                 return wfMsg('edit');
 140                         case 'history':
 141                                 return wfMsg('history_short');
 142                         case 'protect':
 143                                 return wfMsg('protect');
 144                         case 'unprotect':
 145                                 return wfMsg('unprotect');
 146                         case 'delete':
 147                                 return wfMsg('delete');
 148                         case 'watch':
 149                                 return wfMsg('watch');
 150                         case 'unwatch':
 151                                 return wfMsg('unwatch');
 152                         case 'submit':
 153                                 return wfMsg('preview');
 154                         case 'info':
 155                                 return wfMsg('info_short');
 156                         default:
 157                                 return '';
 158                 }
 159         }
 160
 161         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 162         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 163         function setPageTitle( $name ) {
 164                 global $action, $wgContLang;
 165                 $name = $wgContLang->autoConvert($name);
 166                 $this->mPagetitle = $name;
 167                 if(!empty($action)) {
 168                         $taction =  $this->getPageTitleActionText();
 169                         if( !empty( $taction ) ) {
 170                                 $name .= ' - '.$taction;
 171                         }
 172                 }
 173                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 174         }
 175         function getHTMLTitle() { return $this->mHTMLtitle; }
 176         function getPageTitle() { return $this->mPagetitle; }
 177         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 178         function getSubtitle() { return $this->mSubtitle; }
 179         function isArticle() { return $this->mIsarticle; }
 180         function setPrintable() { $this->mPrintable = true; }
 181         function isPrintable() { return $this->mPrintable; }
 182         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 183         function isSyndicated() { return $this->mShowFeedLinks; }
 184         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 185         function getOnloadHandler() { return $this->mOnloadHandler; }
 186         function disable() { $this->mDoNothing = true; }
 187
 188         function setArticleRelated( $v ) {
 189                 $this->mIsArticleRelated = $v;
 190                 if ( !$v ) {
 191                         $this->mIsarticle = false;
 192                 }
 193         }
 194         function setArticleFlag( $v ) {
 195                 $this->mIsarticle = $v;
 196                 if ( $v ) {
 197                         $this->mIsArticleRelated = $v;
 198                 }
 199         }
 200
 201         function isArticleRelated() { return $this->mIsArticleRelated; }
 202
 203         function getLanguageLinks() { return $this->mLanguageLinks; }
 204         function addLanguageLinks($newLinkArray) {
 205                 $this->mLanguageLinks += $newLinkArray;
 206         }
 207         function setLanguageLinks($newLinkArray) {
 208                 $this->mLanguageLinks = $newLinkArray;
 209         }
 210
 211         function getCategoryLinks() {
 212                 return $this->mCategoryLinks;
 213         }
 214         function addCategoryLinks($newLinkArray) {
 215                 $this->mCategoryLinks += $newLinkArray;
 216         }
 217         function setCategoryLinks($newLinkArray) {
 218                 $this->mCategoryLinks += $newLinkArray;
 219         }
 220
 221         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 222         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 223
 224         function addHTML( $text ) { $this->mBodytext .= $text; }
 225         function clearHTML() { $this->mBodytext = ''; }
 226         function debug( $text ) { $this->mDebugtext .= $text; }
 227
 228         function setParserOptions( $options ) {
 229                 return wfSetVar( $this->mParserOptions, $options );
 230         }
 231
 232         /**
 233          * Convert wikitext to HTML and add it to the buffer
 234          */
 235         function addWikiText( $text, $linestart = true ) {
 236                 global $wgParser, $wgTitle, $wgUseTidy;
 237
 238                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 239                 if ($wgUseTidy) {
 240                         $text = Parser::tidy($text);
 241                 }
 242                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 243                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 244                 $this->addHTML( $parserOutput->getText() );
 245         }
 246
 247         /**
 248          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 249          * Saves the text into the parser cache if possible
 250          */
 251         function addPrimaryWikiText( $text, $cacheArticle ) {
 252                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 253
 254                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 255
 256                 # Replace link holders
 257                 $text = $parserOutput->getText();
 258                 $this->replaceLinkHolders( $text );
 259                 if ($wgUseTidy) {
 260                         $text = Parser::tidy($text);
 261                 }
 262                 $parserOutput->setText( $text );
 263
 264                 if ( $cacheArticle ) {
 265                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 266                 }
 267
 268                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 269                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 270                 $this->addHTML( $text );
 271         }
 272
 273         /**
 274          * @param $article
 275          * @param $user
 276          */
 277         function tryParserCache( $article, $user ) {
 278                 global $wgParserCache;
 279                 $parserOutput = $wgParserCache->get( $article, $user );
 280                 if ( $parserOutput !== false ) {
 281                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 282                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 283                         $this->addHTML( $parserOutput->getText() );
 284                         return true;
 285                 } else {
 286                         return false;
 287                 }
 288         }
 289
 290         /**
 291          * Set the maximum cache time on the Squid in seconds
 292          * @param $maxage
 293          */
 294         function setSquidMaxage( $maxage ) {
 295                 $this->mSquidMaxage = $maxage;
 296         }
 297
 298         /**
 299          * Use enableClientCache(false) to force it to send nocache headers
 300          * @param $state
 301          */
 302         function enableClientCache( $state ) {
 303                 return wfSetVar( $this->mEnableClientCache, $state );
 304         }
 305
 306         function sendCacheControl() {
 307                 global $wgUseSquid, $wgUseESI;
 308                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 309                 header( 'Vary: Accept-Encoding, Cookie' );
 310                 if( $this->mEnableClientCache ) {
 311                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 312                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 313                         {
 314                                 if ( $wgUseESI ) {
 315                                         # We'll purge the proxy cache explicitly, but require end user agents
 316                                         # to revalidate against the proxy on each visit.
 317                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 318                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 319                                         # start with a shorter timeout for initial testing
 320                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 321                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 322                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 323                                 } else {
 324                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 325                                         # to revalidate against the proxy on each visit.
 326                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 327                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 328                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 329                                         # start with a shorter timeout for initial testing
 330                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 331                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 332                                 }
 333                         } else {
 334                                 # We do want clients to cache if they can, but they *must* check for updates
 335                                 # on revisiting the page.
 336                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 337                                 header( "Expires: -1" );
 338                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 339                         }
 340                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 341                 } else {
 342                         wfDebug( "** no caching **\n", false );
 343
 344                         # In general, the absence of a last modified header should be enough to prevent
 345                         # the client from using its cache. We send a few other things just to make sure.
 346                         header( 'Expires: -1' );
 347                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 348                         header( 'Pragma: no-cache' );
 349                 }
 350         }
 351
 352         /**
 353          * Finally, all the text has been munged and accumulated into
 354          * the object, let's actually output it:
 355          */
 356         function output() {
 357                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 358                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 359                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 360
 361                 if( $this->mDoNothing ){
 362                         return;
 363                 }
 364                 $fname = 'OutputPage::output';
 365                 wfProfileIn( $fname );
 366                 $sk = $wgUser->getSkin();
 367
 368                 if ( '' != $this->mRedirect ) {
 369                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 370                                 # Standards require redirect URLs to be absolute
 371                                 global $wgServer;
 372                                 $this->mRedirect = $wgServer . $this->mRedirect;
 373                         }
 374                         if( $this->mRedirectCode == '301') {
 375                                 if( !$wgDebugRedirects ) {
 376                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 377                                 }
 378                                 $this->mLastModified = gmdate( 'D, j M Y H:i:s' ) . ' GMT';
 379                         }
 380
 381                         $this->sendCacheControl();
 382
 383                         if( $wgDebugRedirects ) {
 384                                 $url = htmlspecialchars( $this->mRedirect );
 385                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 386                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 387                                 print "</body>\n</html>\n";
 388                         } else {
 389                                 header( 'Location: '.$this->mRedirect );
 390                         }
 391                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 392                         return;
 393                 }
 394
 395
 396                 $this->sendCacheControl();
 397                 # Perform link colouring
 398                 $this->transformBuffer();
 399                 $this->replaceLinkHolders( $this->mSubtitle );
 400
 401                 # Disable temporary placeholders, so that the skin produces HTML
 402                 $sk->postParseLinkColour( false );
 403
 404                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 405                 header( 'Content-language: '.$wgContLanguageCode );
 406
 407                 $exp = time() + $wgCookieExpiration;
 408                 foreach( $this->mCookies as $name => $val ) {
 409                         setcookie( $name, $val, $exp, '/' );
 410                 }
 411
 412                 $sk->outputPage( $this );
 413                 # flush();
 414         }
 415
 416         function out( $ins ) {
 417                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 418                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 419                         $outs = $ins;
 420                 } else {
 421                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 422                         if ( false === $outs ) { $outs = $ins; }
 423                 }
 424                 print $outs;
 425         }
 426
 427         function setEncodings() {
 428                 global $wgInputEncoding, $wgOutputEncoding;
 429                 global $wgUser, $wgContLang;
 430
 431                 $wgInputEncoding = strtolower( $wgInputEncoding );
 432
 433                 if( $wgUser->getOption( 'altencoding' ) ) {
 434                         $wgContLang->setAltEncoding();
 435                         return;
 436                 }
 437
 438                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 439                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 440                         return;
 441                 }
 442
 443                 /*
 444                 # This code is unused anyway!
 445                 # Commenting out. --bv 2003-11-15
 446
 447                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 448                 $best = 0.0;
 449                 $bestset = "*";
 450
 451                 foreach ( $a as $s ) {
 452                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 453                                 $set = $m[1];
 454                                 $q = (float)($m[2]);
 455                         } else {
 456                                 $set = $s;
 457                                 $q = 1.0;
 458                         }
 459                         if ( $q > $best ) {
 460                                 $bestset = $set;
 461                                 $best = $q;
 462                         }
 463                 }
 464                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 465                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 466                 $wgOutputEncoding = strtolower( $bestset );
 467
 468 # Disable for now
 469 #
 470                 */
 471                 $wgOutputEncoding = $wgInputEncoding;
 472         }
 473
 474         /**
 475          * Returns a HTML comment with the elapsed time since request.
 476          * This method has no side effects.
 477          */
 478         function reportTime() {
 479                 global $wgRequestTime;
 480
 481                 $now = wfTime();
 482                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 483                 $start = (float)$sec + (float)$usec;
 484                 $elapsed = $now - $start;
 485
 486                 # Use real server name if available, so we know which machine
 487                 # in a server farm generated the current page.
 488                 if ( function_exists( 'posix_uname' ) ) {
 489                         $uname = @posix_uname();
 490                 } else {
 491                         $uname = false;
 492                 }
 493                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 494                         $hostname = $uname['nodename'];
 495                 } else {
 496                         # This may be a virtual server.
 497                         $hostname = $_SERVER['SERVER_NAME'];
 498                 }
 499                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 500                   $hostname, $elapsed );
 501                 return $com;
 502         }
 503
 504         /**
 505          * Note: these arguments are keys into wfMsg(), not text!
 506          */
 507         function errorpage( $title, $msg ) {
 508                 global $wgTitle;
 509
 510                 $this->mDebugtext .= 'Original title: ' .
 511                   $wgTitle->getPrefixedText() . "\n";
 512                 $this->setPageTitle( wfMsg( $title ) );
 513                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 514                 $this->setRobotpolicy( 'noindex,nofollow' );
 515                 $this->setArticleRelated( false );
 516                 $this->suppressQuickbar();
 517
 518                 $this->enableClientCache( false );
 519                 $this->mRedirect = '';
 520
 521                 $this->mBodytext = '';
 522                 $this->addHTML( '<p>' . wfMsg( $msg ) . "</p>\n" );
 523                 $this->returnToMain( false );
 524
 525                 $this->output();
 526                 wfErrorExit();
 527         }
 528
 529         function sysopRequired() {
 530                 global $wgUser;
 531
 532                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 533                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 534                 $this->setRobotpolicy( 'noindex,nofollow' );
 535                 $this->setArticleRelated( false );
 536                 $this->mBodytext = '';
 537
 538                 $sk = $wgUser->getSkin();
 539                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 540                 $this->addHTML( wfMsg( 'sysoptext', $ap ) );
 541                 $this->returnToMain();
 542         }
 543
 544         function developerRequired() {
 545                 global $wgUser;
 546
 547                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 548                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 549                 $this->setRobotpolicy( 'noindex,nofollow' );
 550                 $this->setArticleRelated( false );
 551                 $this->mBodytext = '';
 552
 553                 $sk = $wgUser->getSkin();
 554                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 555                 $this->addHTML( wfMsg( 'developertext', $ap ) );
 556                 $this->returnToMain();
 557         }
 558
 559         function loginToUse() {
 560                 global $wgUser, $wgTitle, $wgContLang;
 561
 562                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 563                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 564                 $this->setRobotpolicy( 'noindex,nofollow' );
 565                 $this->setArticleFlag( false );
 566                 $this->mBodytext = '';
 567                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 568
 569                 # We put a comment in the .html file so a Sysop can diagnose the page the
 570                 # user can't see.
 571                 $this->addHTML( "\n<!--" .
 572                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 573                                                 ':' .
 574                                                 $wgTitle->getDBkey() . '-->' );
 575                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 576         }
 577
 578         function databaseError( $fname, $sql, $error, $errno ) {
 579                 global $wgUser, $wgCommandLineMode;
 580
 581                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 582                 $this->setRobotpolicy( 'noindex,nofollow' );
 583                 $this->setArticleRelated( false );
 584                 $this->enableClientCache( false );
 585                 $this->mRedirect = '';
 586
 587                 if ( $wgCommandLineMode ) {
 588                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 589                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 590                 } else {
 591                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 592                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 593                 }
 594
 595                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 596                         print $msg."\n";
 597                         wfErrorExit();
 598                 }
 599                 $this->mBodytext = $msg;
 600                 $this->output();
 601                 wfErrorExit();
 602         }
 603
 604         function readOnlyPage( $source = null, $protected = false ) {
 605                 global $wgUser, $wgReadOnlyFile;
 606
 607                 $this->setRobotpolicy( 'noindex,nofollow' );
 608                 $this->setArticleRelated( false );
 609
 610                 if( $protected ) {
 611                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 612                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 613                 } else {
 614                         $this->setPageTitle( wfMsg( 'readonly' ) );
 615                         $reason = file_get_contents( $wgReadOnlyFile );
 616                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 617                 }
 618
 619                 if( is_string( $source ) ) {
 620                         if( strcmp( $source, '' ) == 0 ) {
 621                                 $source = wfMsg( 'noarticletext' );
 622                         }
 623                         $rows = $wgUser->getOption( 'rows' );
 624                         $cols = $wgUser->getOption( 'cols' );
 625                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 626                                 htmlspecialchars( $source ) . "\n</textarea>";
 627                         $this->addHTML( $text );
 628                 }
 629
 630                 $this->returnToMain( false );
 631         }
 632
 633         function fatalError( $message ) {
 634                 $this->setPageTitle( wfMsg( "internalerror" ) );
 635                 $this->setRobotpolicy( "noindex,nofollow" );
 636                 $this->setArticleRelated( false );
 637                 $this->enableClientCache( false );
 638                 $this->mRedirect = '';
 639
 640                 $this->mBodytext = $message;
 641                 $this->output();
 642                 wfErrorExit();
 643         }
 644
 645         function unexpectedValueError( $name, $val ) {
 646                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 647         }
 648
 649         function fileCopyError( $old, $new ) {
 650                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 651         }
 652
 653         function fileRenameError( $old, $new ) {
 654                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 655         }
 656
 657         function fileDeleteError( $name ) {
 658                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 659         }
 660
 661         function fileNotFoundError( $name ) {
 662                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 663         }
 664
 665         /**
 666          * return from error messages or notes
 667          * @param $auto automatically redirect the user after 10 seconds
 668          * @param $returnto page title to return to. Default is Main Page.
 669          */
 670         function returnToMain( $auto = true, $returnto = NULL ) {
 671                 global $wgUser, $wgOut, $wgRequest;
 672
 673                 if ( $returnto == NULL ) {
 674                         $returnto = $wgRequest->getText( 'returnto' );
 675                 }
 676
 677                 $sk = $wgUser->getSkin();
 678                 if ( '' == $returnto ) {
 679                         $returnto = wfMsgForContent( 'mainpage' );
 680                 }
 681                 $link = $sk->makeKnownLink( $returnto, '' );
 682
 683                 $r = wfMsg( 'returnto', $link );
 684                 if ( $auto ) {
 685                         $titleObj = Title::newFromText( $returnto );
 686                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 687                 }
 688                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 689         }
 690
 691         /**
 692          * This function takes the existing and broken links for the page
 693          * and uses the first 10 of them for META keywords
 694          */
 695         function addMetaTags () {
 696                 global $wgLinkCache , $wgOut ;
 697                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 698                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 699                 $a = array_merge ( $good , $bad ) ;
 700                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 701                 $a = implode ( ',' , $a ) ;
 702                 $strip = array(
 703                         "/<.*?" . ">/" => '',
 704                         "/[_]/" => ' '
 705                 );
 706                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 707
 708                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 709         }
 710
 711         /**
 712          * @private
 713          */
 714         function headElement() {
 715                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 716                 global $wgUser, $wgContLang, $wgRequest;
 717
 718                 $xml = ($wgMimeType == 'text/xml');
 719                 if( $xml ) {
 720                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 721                 } else {
 722                         $ret = '';
 723                 }
 724
 725                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 726
 727                 if ( "" == $this->mHTMLtitle ) {
 728                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 729                 }
 730                 if( $xml ) {
 731                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 732                 } else {
 733                         $xmlbits = '';
 734                 }
 735                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 736                 $ret .= "<html $xmlbits lang=\"$wgContLanguageCode\" $rtl>\n";
 737                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 738                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 739
 740                 $ret .= $this->getHeadLinks();
 741                 global $wgStylePath;
 742                 if( $this->isPrintable() ) {
 743                         $media = '';
 744                 } else {
 745                         $media = "media='print'";
 746                 }
 747                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 748                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 749
 750                 $sk = $wgUser->getSkin();
 751                 $ret .= $sk->getHeadScripts();
 752                 $ret .= $this->mScripts;
 753                 $ret .= $sk->getUserStyles();
 754
 755                 $ret .= "</head>\n";
 756                 return $ret;
 757         }
 758
 759         function getHeadLinks() {
 760                 global $wgRequest, $wgStylePath;
 761                 $ret = '';
 762                 foreach ( $this->mMetatags as $tag ) {
 763                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 764                                 $a = 'http-equiv';
 765                                 $tag[0] = substr( $tag[0], 5 );
 766                         } else {
 767                                 $a = 'name';
 768                         }
 769                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 770                 }
 771                 $p = $this->mRobotpolicy;
 772                 if ( '' == $p ) { $p = 'index,follow'; }
 773                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 774
 775                 if ( count( $this->mKeywords ) > 0 ) {
 776                         $strip = array(
 777                                 "/<.*?" . ">/" => '',
 778                                 "/[_]/" => ' '
 779                         );
 780                         $ret .= "<meta name=\"keywords\" content=\"" .
 781                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 782                 }
 783                 foreach ( $this->mLinktags as $tag ) {
 784                         $ret .= '<link';
 785                         foreach( $tag as $attr => $val ) {
 786                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 787                         }
 788                         $ret .= " />\n";
 789                 }
 790                 if( $this->isSyndicated() ) {
 791                         # FIXME: centralize the mime-type and name information in Feed.php
 792                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 793                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 794                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 795                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 796                 }
 797                 # FIXME: get these working
 798                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 799                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'>< /script><![endif]-->";
 800                 return $ret;
 801         }
 802
 803         /**
 804          * Run any necessary pre-output transformations on the buffer text
 805          */
 806         function transformBuffer( $options = 0 ) {
 807                 $this->replaceLinkHolders( $this->mBodytext, $options );
 808         }
 809
 810         /**
 811          * Replace <!--LINK--> link placeholders with actual links, in the buffer
 812          * Placeholders created in Skin::makeLinkObj()
 813          * Returns an array of links found, indexed by PDBK:
 814          *  0 - broken
 815          *  1 - normal link
 816          *  2 - stub
 817          * $options is a bit field, RLH_FOR_UPDATE to select for update
 818          */
 819         function replaceLinkHolders( &$text, $options = 0 ) {
 820                 global $wgUser, $wgLinkCache, $wgUseOldExistenceCheck, $wgLinkHolders;
 821
 822                 if ( $wgUseOldExistenceCheck ) {
 823                         return array();
 824                 }
 825
 826                 $fname = 'OutputPage::replaceLinkHolders';
 827                 wfProfileIn( $fname );
 828
 829                 $pdbks = array();
 830                 $colours = array();
 831
 832                 #if ( !empty( $tmpLinks[0] ) ) { #TODO
 833                 if ( !empty( $wgLinkHolders['namespaces'] ) ) {
 834                         wfProfileIn( $fname.'-check' );
 835                         $dbr =& wfGetDB( DB_SLAVE );
 836                         $cur = $dbr->tableName( 'cur' );
 837                         $sk = $wgUser->getSkin();
 838                         $threshold = $wgUser->getOption('stubthreshold');
 839
 840                         # Sort by namespace
 841                         asort( $wgLinkHolders['namespaces'] );
 842
 843                         # Generate query
 844                         $query = false;
 845                         foreach ( $wgLinkHolders['namespaces'] as $key => $val ) {
 846                                 # Make title object
 847                                 $title = $wgLinkHolders['titles'][$key];
 848
 849                                 # Skip invalid entries.
 850                                 # Result will be ugly, but prevents crash.
 851                                 if ( is_null( $title ) ) {
 852                                         continue;
 853                                 }
 854                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
 855
 856                                 # Check if it's in the link cache already
 857                                 if ( $wgLinkCache->getGoodLinkID( $pdbk ) ) {
 858                                         $colours[$pdbk] = 1;
 859                                 } elseif ( $wgLinkCache->isBadLink( $pdbk ) ) {
 860                                         $colours[$pdbk] = 0;
 861                                 } else {
 862                                         # Not in the link cache, add it to the query
 863                                         if ( !isset( $current ) ) {
 864                                                 $current = $val;
 865                                                 $query =  "SELECT cur_id, cur_namespace, cur_title";
 866                                                 if ( $threshold > 0 ) {
 867                                                         $query .= ", LENGTH(cur_text) AS cur_len, cur_is_redirect";
 868                                                 }
 869                                                 $query .= " FROM $cur WHERE (cur_namespace=$val AND cur_title IN(";
 870                                         } elseif ( $current != $val ) {
 871                                                 $current = $val;
 872                                                 $query .= ")) OR (cur_namespace=$val AND cur_title IN(";
 873                                         } else {
 874                                                 $query .= ', ';
 875                                         }
 876
 877                                         $query .= $dbr->addQuotes( $wgLinkHolders['dbkeys'][$key] );
 878                                 }
 879                         }
 880                         if ( $query ) {
 881                                 $query .= '))';
 882                                 if ( $options & RLH_FOR_UPDATE ) {
 883                                         $query .= ' FOR UPDATE';
 884                                 }
 885
 886                                 $res = $dbr->query( $query, $fname );
 887
 888                                 # Fetch data and form into an associative array
 889                                 # non-existent = broken
 890                                 # 1 = known
 891                                 # 2 = stub
 892                                 while ( $s = $dbr->fetchObject($res) ) {
 893                                         $title = Title::makeTitle( $s->cur_namespace, $s->cur_title );
 894                                         $pdbk = $title->getPrefixedDBkey();
 895                                         $wgLinkCache->addGoodLink( $s->cur_id, $pdbk );
 896
 897                                         if ( $threshold >  0 ) {
 898                                                 $size = $s->cur_len;
 899                                                 if ( $s->cur_is_redirect || $s->cur_namespace != 0 || $length < $threshold ) {
 900                                                         $colours[$pdbk] = 1;
 901                                                 } else {
 902                                                         $colours[$pdbk] = 2;
 903                                                 }
 904                                         } else {
 905                                                 $colours[$pdbk] = 1;
 906                                         }
 907                                 }
 908                         }
 909                         wfProfileOut( $fname.'-check' );
 910
 911                         # Construct search and replace arrays
 912                         wfProfileIn( $fname.'-construct' );
 913                         global $outputReplace;
 914                         $outputReplace = array();
 915                         foreach ( $wgLinkHolders['namespaces'] as $key => $ns ) {
 916                                 $pdbk = $pdbks[$key];
 917                                 $searchkey = '<!--LINK '.$key.'-->';
 918                                 $title = $wgLinkHolders['titles'][$key];
 919                                 if ( empty( $colours[$pdbk] ) ) {
 920                                         $wgLinkCache->addBadLink( $pdbk );
 921                                         $colours[$pdbk] = 0;
 922                                         $outputReplace[$searchkey] = $sk->makeBrokenLinkObj( $title,
 923                                                                         $wgLinkHolders['texts'][$key],
 924                                                                         $wgLinkHolders['queries'][$key] );
 925                                 } elseif ( $colours[$pdbk] == 1 ) {
 926                                         $outputReplace[$searchkey] = $sk->makeKnownLinkObj( $title,
 927                                                                         $wgLinkHolders['texts'][$key],
 928                                                                         $wgLinkHolders['queries'][$key] );
 929                                 } elseif ( $colours[$pdbk] == 2 ) {
 930                                         $outputReplace[$searchkey] = $sk->makeStubLinkObj( $title,
 931                                                                         $wgLinkHolders['texts'][$key],
 932                                                                         $wgLinkHolders['queries'][$key] );
 933                                 }
 934                         }
 935                         wfProfileOut( $fname.'-construct' );
 936
 937                         # Do the thing
 938                         wfProfileIn( $fname.'-replace' );
 939
 940                         $text = preg_replace_callback(
 941                                 '/(<!--LINK .*?-->)/',
 942                                 "outputReplaceMatches",
 943                                 $text);
 944                         wfProfileOut( $fname.'-replace' );
 945
 946                         wfProfileIn( $fname.'-interwiki' );
 947                         global $wgInterwikiLinkHolders;
 948                         $outputReplace = $wgInterwikiLinkHolders;
 949                         $text = preg_replace_callback(
 950                                 '/<!--IWLINK (.*?)-->/',
 951                                 "outputReplaceMatches",
 952                                 $text);
 953                         wfProfileOut( $fname.'-interwiki' );
 954                 }
 955
 956                 wfProfileOut( $fname );
 957                 return $colours;
 958         }
 959 }
 960
 961 function &outputReplaceMatches($matches) {
 962         global $outputReplace;
 963         return $outputReplace[$matches[1]];
 964 }
 965
 966 }
 967 ?>