includes/OutputPage.php

   1 <?php
   2 /**
   3  * $Id$
   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         function OutputPage()
  40         {
  41                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  42                 $this->mKeywords = $this->mLinktags = array();
  43                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  44                 $this->mRedirect = $this->mLastModified =
  45                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  46                 $this->mOnloadHandler = "";
  47                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  48                 $this->mSuppressQuickbar = $this->mPrintable = false;
  49                 $this->mLanguageLinks = array();
  50                 $this->mCategoryLinks = array() ;
  51                 $this->mDoNothing = false;
  52                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  53                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  54                 $this->mSquidMaxage = 0;
  55                 $this->mScripts = "";
  56         }
  57
  58         function addHeader( $name, $val ) { array_push( $this->mHeaders, "$name: $val" ) ; }
  59         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  60         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  61
  62         # To add an http-equiv meta tag, precede the name with "http:"
  63         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  64         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  65         function addScript( $script ) { $this->mScripts .= $script; }
  66         function getScript() { return $this->mScripts; }
  67
  68         function addLink( $linkarr ) {
  69                 # $linkarr should be an associative array of attributes. We'll escape on output.
  70                 array_push( $this->mLinktags, $linkarr );
  71         }
  72
  73         function addMetadataLink( $linkarr ) {
  74                 # note: buggy CC software only reads first "meta" link
  75                 static $haveMeta = false;
  76                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  77                 $this->addLink( $linkarr );
  78                 $haveMeta = true;
  79         }
  80
  81         /**
  82          * checkLastModified tells the client to use the client-cached page if
  83          * possible. If sucessful, the OutputPage is disabled so that
  84          * any future call to OutputPage->output() have no effect. The method
  85          * returns true iff cache-ok headers was sent.
  86          */
  87         function checkLastModified ( $timestamp )
  88         {
  89                 global $wgLang, $wgCachePages, $wgUser;
  90                 $timestamp=wfTimestamp(TS_MW,$timestamp);
  91                 if( !$wgCachePages ) {
  92                         wfDebug( "CACHE DISABLED\n", false );
  93                         return;
  94                 }
  95                 if( preg_match( '/MSIE ([1-4]|5\.0)/', $_SERVER["HTTP_USER_AGENT"] ) ) {
  96                         # IE 5.0 has probs with our caching
  97                         wfDebug( "-- bad client, not caching\n", false );
  98                         return;
  99                 }
 100                 if( $wgUser->getOption( 'nocache' ) ) {
 101                         wfDebug( "USER DISABLED CACHE\n", false );
 102                         return;
 103                 }
 104
 105                 $lastmod = gmdate( "D, j M Y H:i:s", wfTimestamp(TS_UNIX, max( $timestamp, $wgUser->mTouched ) ) ) . " GMT";
 106
 107                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 108                         # IE sends sizes after the date like this:
 109                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 110                         # this breaks strtotime().
 111                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 112                         $ismodsince = wfTimestamp( TS_MW, strtotime( $modsince ) );
 113                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 114                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 115                         if( ($ismodsince >= $timestamp ) and $wgUser->validateCache( $ismodsince ) ) {
 116                                 # Make sure you're in a place you can leave when you call us!
 117                                 header( "HTTP/1.0 304 Not Modified" );
 118                                 $this->mLastModified = $lastmod;
 119                                 $this->sendCacheControl();
 120                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 121                                 $this->disable();
 122                                 return true;
 123                         } else {
 124                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 125                                 $this->mLastModified = $lastmod;
 126                         }
 127                 } else {
 128                         wfDebug( "We're confused.\n", false );
 129                         $this->mLastModified = $lastmod;
 130                 }
 131         }
 132
 133         function getPageTitleActionText () {
 134                 global $action;
 135                 switch($action) {
 136                         case 'edit':
 137                                 return wfMsg('edit');
 138                         case 'history':
 139                                 return wfMsg('history_short');
 140                         case 'protect':
 141                                 return wfMsg('protect');
 142                         case 'unprotect':
 143                                 return wfMsg('unprotect');
 144                         case 'delete':
 145                                 return wfMsg('delete');
 146                         case 'watch':
 147                                 return wfMsg('watch');
 148                         case 'unwatch':
 149                                 return wfMsg('unwatch');
 150                         case 'submit':
 151                                 return wfMsg('preview');
 152                         case 'info':
 153                                 return wfMsg('info_short');
 154                         default:
 155                                 return '';
 156                 }
 157         }
 158         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 159         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 160         function setPageTitle( $name ) {
 161                 global $action;
 162                 $this->mPagetitle = $name;
 163                 if(!empty($action)) {
 164                         $taction =  $this->getPageTitleActionText();
 165                         if( !empty( $taction ) ) {
 166                                 $name .= ' - '.$taction;
 167                         }
 168                 }
 169                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 170         }
 171         function getHTMLTitle() { return $this->mHTMLtitle; }
 172         function getPageTitle() { return $this->mPagetitle; }
 173         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 174         function getSubtitle() { return $this->mSubtitle; }
 175         function isArticle() { return $this->mIsarticle; }
 176         function setPrintable() { $this->mPrintable = true; }
 177         function isPrintable() { return $this->mPrintable; }
 178         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 179         function isSyndicated() { return $this->mShowFeedLinks; }
 180         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 181         function getOnloadHandler() { return $this->mOnloadHandler; }
 182         function disable() { $this->mDoNothing = true; }
 183
 184         function setArticleRelated( $v )
 185         {
 186                 $this->mIsArticleRelated = $v;
 187                 if ( !$v ) {
 188                         $this->mIsarticle = false;
 189                 }
 190         }
 191         function setArticleFlag( $v ) {
 192                 $this->mIsarticle = $v;
 193                 if ( $v ) {
 194                         $this->mIsArticleRelated = $v;
 195                 }
 196         }
 197
 198         function isArticleRelated()
 199         {
 200                 return $this->mIsArticleRelated;
 201         }
 202
 203         function getLanguageLinks() {
 204                 return $this->mLanguageLinks;
 205         }
 206         function addLanguageLinks($newLinkArray) {
 207                 $this->mLanguageLinks += $newLinkArray;
 208         }
 209         function setLanguageLinks($newLinkArray) {
 210                 $this->mLanguageLinks = $newLinkArray;
 211         }
 212         function getCategoryLinks() {
 213                 return $this->mCategoryLinks;
 214         }
 215         function addCategoryLinks($newLinkArray) {
 216                 $this->mCategoryLinks += $newLinkArray;
 217         }
 218         function setCategoryLinks($newLinkArray) {
 219                 $this->mCategoryLinks += $newLinkArray;
 220         }
 221
 222         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 223         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 224
 225         function addHTML( $text ) { $this->mBodytext .= $text; }
 226         function clearHTML() { $this->mBodytext = ''; }
 227         function debug( $text ) { $this->mDebugtext .= $text; }
 228
 229         function setParserOptions( $options )
 230         {
 231                 return wfSetVar( $this->mParserOptions, $options );
 232         }
 233
 234         /**
 235          * Convert wikitext to HTML and add it to the buffer
 236          */
 237         function addWikiText( $text, $linestart = true )
 238         {
 239                 global $wgParser, $wgTitle;
 240
 241                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 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;
 253
 254                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 255
 256                 # Replace link holders
 257                 $text = $parserOutput->getText();
 258                 $this->replaceLinkHolders( $text );
 259                 $parserOutput->setText( $text );
 260
 261                 if ( $cacheArticle ) {
 262                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 263                 }
 264
 265                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 266                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 267                 $this->addHTML( $text );
 268         }
 269
 270         function tryParserCache( $article, $user ) {
 271                 global $wgParserCache;
 272                 $parserOutput = $wgParserCache->get( $article, $user );
 273                 if ( $parserOutput !== false ) {
 274                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 275                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 276                         $this->addHTML( $parserOutput->getText() );
 277                         return true;
 278                 } else {
 279                         return false;
 280                 }
 281         }
 282
 283         /**
 284          * Set the maximum cache time on the Squid in seconds
 285          */
 286         function setSquidMaxage( $maxage ) {
 287                 $this->mSquidMaxage = $maxage;
 288         }
 289
 290         /**
 291          * Use enableClientCache(false) to force it to send nocache headers
 292          */
 293         function enableClientCache( $state ) {
 294                 return wfSetVar( $this->mEnableClientCache, $state );
 295         }
 296
 297         function sendCacheControl() {
 298                 global $wgUseSquid, $wgUseESI;
 299                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 300                 header( 'Vary: Accept-Encoding, Cookie' );
 301                 if( $this->mEnableClientCache ) {
 302                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 303                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 304                         {
 305                                 if ( $wgUseESI ) {
 306                                         # We'll purge the proxy cache explicitly, but require end user agents
 307                                         # to revalidate against the proxy on each visit.
 308                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 309                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 310                                         # start with a shorter timeout for initial testing
 311                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 312                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 313                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 314                                 } else {
 315                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 316                                         # to revalidate against the proxy on each visit.
 317                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 318                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 319                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 320                                         # start with a shorter timeout for initial testing
 321                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 322                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 323                                 }
 324                         } else {
 325                                 # We do want clients to cache if they can, but they *must* check for updates
 326                                 # on revisiting the page.
 327                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 328                                 header( "Expires: -1" );
 329                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 330                         }
 331                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 332                 } else {
 333                         wfDebug( "** no caching **\n", false );
 334
 335                         # In general, the absence of a last modified header should be enough to prevent
 336                         # the client from using its cache. We send a few other things just to make sure.
 337                         header( 'Expires: -1' );
 338                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 339                         header( 'Pragma: no-cache' );
 340                 }
 341         }
 342
 343         /**
 344          * Finally, all the text has been munged and accumulated into
 345          * the object, let's actually output it:
 346          */
 347         function output()
 348         {
 349                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 350                 global $wgInputEncoding, $wgOutputEncoding, $wgLanguageCode;
 351                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 352                 if( $this->mDoNothing ){
 353                         return;
 354                 }
 355                 $fname = 'OutputPage::output';
 356                 wfProfileIn( $fname );
 357
 358                 $sk = $wgUser->getSkin();
 359
 360                 if ( '' != $this->mRedirect ) {
 361                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 362                                 # Standards require redirect URLs to be absolute
 363                                 global $wgServer;
 364                                 $this->mRedirect = $wgServer . $this->mRedirect;
 365                         }
 366                         if( $this->mRedirectCode == '301') {
 367                                 if( !$wgDebugRedirects ) {
 368                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 369                                 }
 370                                 $this->mLastModified = gmdate( 'D, j M Y H:i:s' ) . ' GMT';
 371                         }
 372
 373                         $this->sendCacheControl();
 374
 375                         if( $wgDebugRedirects ) {
 376                                 $url = htmlspecialchars( $this->mRedirect );
 377                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 378                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 379                                 print "</body>\n</html>\n";
 380                         } else {
 381                                 header( 'Location: '.$this->mRedirect );
 382                         }
 383                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 384                         return;
 385                 }
 386
 387
 388                 $this->sendCacheControl();
 389                 # Perform link colouring
 390                 $this->transformBuffer();
 391                 $this->replaceLinkHolders( $this->mSubtitle );
 392
 393                 # Disable temporary placeholders, so that the skin produces HTML
 394                 $sk->postParseLinkColour( false );
 395
 396                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 397                 header( 'Content-language: '.$wgLanguageCode );
 398
 399                 $exp = time() + $wgCookieExpiration;
 400                 foreach( $this->mCookies as $name => $val ) {
 401                         setcookie( $name, $val, $exp, '/' );
 402                 }
 403
 404                 $sk->outputPage( $this );
 405                 # flush();
 406         }
 407
 408         function out( $ins ) {
 409                 global $wgInputEncoding, $wgOutputEncoding, $wgLang;
 410                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 411                         $outs = $ins;
 412                 } else {
 413                         $outs = $wgLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 414                         if ( false === $outs ) { $outs = $ins; }
 415                 }
 416                 print $outs;
 417         }
 418
 419         function setEncodings() {
 420                 global $wgInputEncoding, $wgOutputEncoding;
 421                 global $wgUser, $wgLang;
 422
 423                 $wgInputEncoding = strtolower( $wgInputEncoding );
 424
 425                 if( $wgUser->getOption( 'altencoding' ) ) {
 426                         $wgLang->setAltEncoding();
 427                         return;
 428                 }
 429
 430                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 431                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 432                         return;
 433                 }
 434
 435                 /*
 436                 # This code is unused anyway!
 437                 # Commenting out. --bv 2003-11-15
 438
 439                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 440                 $best = 0.0;
 441                 $bestset = "*";
 442
 443                 foreach ( $a as $s ) {
 444                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 445                                 $set = $m[1];
 446                                 $q = (float)($m[2]);
 447                         } else {
 448                                 $set = $s;
 449                                 $q = 1.0;
 450                         }
 451                         if ( $q > $best ) {
 452                                 $bestset = $set;
 453                                 $best = $q;
 454                         }
 455                 }
 456                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 457                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 458                 $wgOutputEncoding = strtolower( $bestset );
 459
 460 # Disable for now
 461 #
 462                 */
 463                 $wgOutputEncoding = $wgInputEncoding;
 464         }
 465
 466         /**
 467          * Returns a HTML comment with the elapsed time since request.
 468          * This method has no side effects.
 469          */
 470         function reportTime() {
 471                 global $wgRequestTime;
 472
 473                 $now = wfTime();
 474                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 475                 $start = (float)$sec + (float)$usec;
 476                 $elapsed = $now - $start;
 477
 478                 # Use real server name if available, so we know which machine
 479                 # in a server farm generated the current page.
 480                 if ( function_exists( 'posix_uname' ) ) {
 481                         $uname = @posix_uname();
 482                 } else {
 483                         $uname = false;
 484                 }
 485                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 486                         $hostname = $uname['nodename'];
 487                 } else {
 488                         # This may be a virtual server.
 489                         $hostname = $_SERVER['SERVER_NAME'];
 490                 }
 491                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 492                   $hostname, $elapsed );
 493                 return $com;
 494         }
 495
 496         /**
 497          * Note: these arguments are keys into wfMsg(), not text!
 498          */
 499         function errorpage( $title, $msg ) {
 500                 global $wgTitle;
 501
 502                 $this->mDebugtext .= 'Original title: ' .
 503                   $wgTitle->getPrefixedText() . "\n";
 504                 $this->setPageTitle( wfMsg( $title ) );
 505                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 506                 $this->setRobotpolicy( 'noindex,nofollow' );
 507                 $this->setArticleRelated( false );
 508                 $this->enableClientCache( false );
 509                 $this->mRedirect = '';
 510
 511                 $this->mBodytext = '';
 512                 $this->addHTML( '<p>' . wfMsg( $msg ) . "</p>\n" );
 513                 $this->returnToMain( false );
 514
 515                 $this->output();
 516                 wfErrorExit();
 517         }
 518
 519         function sysopRequired() {
 520                 global $wgUser;
 521
 522                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 523                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 524                 $this->setRobotpolicy( 'noindex,nofollow' );
 525                 $this->setArticleRelated( false );
 526                 $this->mBodytext = '';
 527
 528                 $sk = $wgUser->getSkin();
 529                 $ap = $sk->makeKnownLink( wfMsg( 'administrators' ), '' );
 530                 $this->addHTML( wfMsg( 'sysoptext', $ap ) );
 531                 $this->returnToMain();
 532         }
 533
 534         function developerRequired() {
 535                 global $wgUser;
 536
 537                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 538                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 539                 $this->setRobotpolicy( 'noindex,nofollow' );
 540                 $this->setArticleRelated( false );
 541                 $this->mBodytext = '';
 542
 543                 $sk = $wgUser->getSkin();
 544                 $ap = $sk->makeKnownLink( wfMsg( 'administrators' ), '' );
 545                 $this->addHTML( wfMsg( 'developertext', $ap ) );
 546                 $this->returnToMain();
 547         }
 548
 549         function loginToUse() {
 550                 global $wgUser, $wgTitle, $wgLang;
 551
 552                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 553                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 554                 $this->setRobotpolicy( 'noindex,nofollow' );
 555                 $this->setArticleFlag( false );
 556                 $this->mBodytext = '';
 557                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 558
 559                 # We put a comment in the .html file so a Sysop can diagnose the page the
 560                 # user can't see.
 561                 $this->addHTML( "\n<!--" .
 562                                                 $wgLang->getNsText( $wgTitle->getNamespace() ) .
 563                                                 ':' .
 564                                                 $wgTitle->getDBkey() . '-->' );
 565                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 566         }
 567
 568         function databaseError( $fname, $sql, $error, $errno ) {
 569                 global $wgUser, $wgCommandLineMode;
 570
 571                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 572                 $this->setRobotpolicy( 'noindex,nofollow' );
 573                 $this->setArticleRelated( false );
 574                 $this->enableClientCache( false );
 575                 $this->mRedirect = '';
 576
 577                 if ( $wgCommandLineMode ) {
 578                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 579                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 580                 } else {
 581                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 582                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 583                 }
 584
 585                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 586                         print $msg."\n";
 587                         wfErrorExit();
 588                 }
 589                 $this->mBodytext = $msg;
 590                 $this->output();
 591                 wfErrorExit();
 592         }
 593
 594         function readOnlyPage( $source = null, $protected = false ) {
 595                 global $wgUser, $wgReadOnlyFile;
 596
 597                 $this->setRobotpolicy( 'noindex,nofollow' );
 598                 $this->setArticleRelated( false );
 599
 600                 if( $protected ) {
 601                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 602                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 603                 } else {
 604                         $this->setPageTitle( wfMsg( 'readonly' ) );
 605                         $reason = file_get_contents( $wgReadOnlyFile );
 606                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 607                 }
 608
 609                 if( is_string( $source ) ) {
 610                         if( strcmp( $source, '' ) == 0 ) {
 611                                 $source = wfMsg( 'noarticletext' );
 612                         }
 613                         $rows = $wgUser->getOption( 'rows' );
 614                         $cols = $wgUser->getOption( 'cols' );
 615                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 616                                 htmlspecialchars( $source ) . "\n</textarea>";
 617                         $this->addHTML( $text );
 618                 }
 619
 620                 $this->returnToMain( false );
 621         }
 622
 623         function fatalError( $message ) {
 624                 $this->setPageTitle( wfMsg( "internalerror" ) );
 625                 $this->setRobotpolicy( "noindex,nofollow" );
 626                 $this->setArticleRelated( false );
 627                 $this->enableClientCache( false );
 628                 $this->mRedirect = '';
 629
 630                 $this->mBodytext = $message;
 631                 $this->output();
 632                 wfErrorExit();
 633         }
 634
 635         function unexpectedValueError( $name, $val ) {
 636                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 637         }
 638
 639         function fileCopyError( $old, $new ) {
 640                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 641         }
 642
 643         function fileRenameError( $old, $new ) {
 644                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 645         }
 646
 647         function fileDeleteError( $name ) {
 648                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 649         }
 650
 651         function fileNotFoundError( $name ) {
 652                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 653         }
 654
 655         /**
 656          * return from error messages or notes
 657          * @param $auto automatically redirect the user after 10 seconds
 658          * @param $returnto page title to return to. Default is Main Page.
 659          */
 660         function returnToMain( $auto = true, $returnto = NULL ) {
 661                 global $wgUser, $wgOut, $wgRequest;
 662
 663                 if ( $returnto == NULL ) {
 664                         $returnto = $wgRequest->getText( 'returnto' );
 665                 }
 666
 667                 $sk = $wgUser->getSkin();
 668                 if ( '' == $returnto ) {
 669                         $returnto = wfMsg( 'mainpage' );
 670                 }
 671                 $link = $sk->makeKnownLink( $returnto, '' );
 672
 673                 $r = wfMsg( 'returnto', $link );
 674                 if ( $auto ) {
 675                         $titleObj = Title::newFromText( $returnto );
 676                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 677                 }
 678                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 679         }
 680
 681         /**
 682          * This function takes the existing and broken links for the page
 683          * and uses the first 10 of them for META keywords
 684          */
 685         function addMetaTags () {
 686                 global $wgLinkCache , $wgOut ;
 687                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 688                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 689                 $a = array_merge ( $good , $bad ) ;
 690                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 691                 $a = implode ( ',' , $a ) ;
 692                 $strip = array(
 693                         "/<.*?" . ">/" => '',
 694                         "/[_]/" => ' '
 695                 );
 696                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 697
 698                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 699         }
 700
 701         /**
 702          * @private
 703          */
 704         function headElement() {
 705                 global $wgDocType, $wgDTD, $wgLanguageCode, $wgOutputEncoding, $wgMimeType;
 706                 global $wgUser, $wgLang, $wgRequest;
 707
 708                 $xml = ($wgMimeType == 'text/xml');
 709                 if( $xml ) {
 710                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 711                 } else {
 712                         $ret = '';
 713                 }
 714
 715                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 716
 717                 if ( "" == $this->mHTMLtitle ) {
 718                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 719                 }
 720                 if( $xml ) {
 721                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 722                 } else {
 723                         $xmlbits = '';
 724                 }
 725                 $rtl = $wgLang->isRTL() ? " dir='RTL'" : '';
 726                 $ret .= "<html $xmlbits lang=\"$wgLanguageCode\" $rtl>\n";
 727                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 728                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 729
 730                 $ret .= $this->getHeadLinks();
 731                 global $wgStylePath;
 732                 if( $this->isPrintable() ) {
 733                         $media = '';
 734                 } else {
 735                         $media = "media='print'";
 736                 }
 737                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 738                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 739
 740                 $sk = $wgUser->getSkin();
 741                 $ret .= $sk->getHeadScripts();
 742                 $ret .= $this->mScripts;
 743                 $ret .= $sk->getUserStyles();
 744
 745                 $ret .= "</head>\n";
 746                 return $ret;
 747         }
 748
 749         function getHeadLinks() {
 750                 global $wgRequest, $wgStylePath;
 751                 $ret = '';
 752                 foreach ( $this->mMetatags as $tag ) {
 753                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 754                                 $a = 'http-equiv';
 755                                 $tag[0] = substr( $tag[0], 5 );
 756                         } else {
 757                                 $a = 'name';
 758                         }
 759                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 760                 }
 761                 $p = $this->mRobotpolicy;
 762                 if ( '' == $p ) { $p = 'index,follow'; }
 763                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 764
 765                 if ( count( $this->mKeywords ) > 0 ) {
 766                         $strip = array(
 767                                 "/<.*?" . ">/" => '',
 768                                 "/[_]/" => ' '
 769                         );
 770                         $ret .= "<meta name=\"keywords\" content=\"" .
 771                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 772                 }
 773                 foreach ( $this->mLinktags as $tag ) {
 774                         $ret .= '<link';
 775                         foreach( $tag as $attr => $val ) {
 776                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 777                         }
 778                         $ret .= " />\n";
 779                 }
 780                 if( $this->isSyndicated() ) {
 781                         # FIXME: centralize the mime-type and name information in Feed.php
 782                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 783                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 784                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 785                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 786                 }
 787                 # FIXME: get these working
 788                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 789                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'>< /script><![endif]-->";
 790                 return $ret;
 791         }
 792
 793         /**
 794          * Run any necessary pre-output transformations on the buffer text
 795          */
 796         function transformBuffer( $options = 0 ) {
 797                 $this->replaceLinkHolders( $this->mBodytext, $options );
 798         }
 799
 800         /**
 801          * Replace <!--LINK--> link placeholders with actual links, in the buffer
 802          * Placeholders created in Skin::makeLinkObj()
 803          * Returns an array of links found, indexed by PDBK:
 804          *  0 - broken
 805          *  1 - normal link
 806          *  2 - stub
 807          * $options is a bit field, RLH_FOR_UPDATE to select for update
 808          */
 809         function replaceLinkHolders( &$text, $options = 0 ) {
 810                 global $wgUser, $wgLinkCache, $wgUseOldExistenceCheck;
 811
 812                 if ( $wgUseOldExistenceCheck ) {
 813                         return array();
 814                 }
 815
 816                 $fname = 'OutputPage::replaceLinkHolders';
 817                 wfProfileIn( $fname );
 818
 819                 $titles = array();
 820                 $pdbks = array();
 821                 $colours = array();
 822
 823                 # Get placeholders from body
 824                 wfProfileIn( $fname.'-match' );
 825                 preg_match_all( "/<!--LINK (.*?) (.*?) (.*?) (.*?)-->/", $text, $tmpLinks );
 826                 wfProfileOut( $fname.'-match' );
 827
 828                 if ( !empty( $tmpLinks[0] ) ) {
 829                         wfProfileIn( $fname.'-check' );
 830                         $dbr =& wfGetDB( DB_SLAVE );
 831                         $cur = $dbr->tableName( 'cur' );
 832                         $sk = $wgUser->getSkin();
 833                         $threshold = $wgUser->getOption('stubthreshold');
 834
 835                         $namespaces =& $tmpLinks[1];
 836                         $dbkeys =& $tmpLinks[2];
 837                         $queries =& $tmpLinks[3];
 838                         $texts =& $tmpLinks[4];
 839
 840                         # Sort by namespace
 841                         asort( $namespaces );
 842
 843                         # Generate query
 844                         $query = false;
 845                         foreach ( $namespaces as $key => $val ) {
 846                                 # Make title object
 847                                 $dbk = $dbkeys[$key];
 848                                 $title = $titles[$key] = Title::makeTitleSafe( $val, $dbk );
 849
 850                                 # Skip invalid entries.
 851                                 # Result will be ugly, but prevents crash.
 852                                 if ( is_null( $title ) ) {
 853                                         continue;
 854                                 }
 855                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
 856
 857                                 # Check if it's in the link cache already
 858                                 if ( $wgLinkCache->getGoodLinkID( $pdbk ) ) {
 859                                         $colours[$pdbk] = 1;
 860                                 } elseif ( $wgLinkCache->isBadLink( $pdbk ) ) {
 861                                         $colours[$pdbk] = 0;
 862                                 } else {
 863                                         # Not in the link cache, add it to the query
 864                                         if ( !isset( $current ) ) {
 865                                                 $current = $val;
 866                                                 $query =  "SELECT cur_id, cur_namespace, cur_title";
 867                                                 if ( $threshold > 0 ) {
 868                                                         $query .= ", LENGTH(cur_text) AS cur_len, cur_is_redirect";
 869                                                 }
 870                                                 $query .= " FROM $cur WHERE (cur_namespace=$val AND cur_title IN(";
 871                                         } elseif ( $current != $val ) {
 872                                                 $current = $val;
 873                                                 $query .= ")) OR (cur_namespace=$val AND cur_title IN(";
 874                                         } else {
 875                                                 $query .= ', ';
 876                                         }
 877
 878                                         $query .= $dbr->addQuotes( $dbkeys[$key] );
 879                                 }
 880                         }
 881                         if ( $query ) {
 882                                 $query .= '))';
 883                                 if ( $options & RLH_FOR_UPDATE ) {
 884                                         $query .= ' FOR UPDATE';
 885                                 }
 886
 887                                 $res = $dbr->query( $query, $fname );
 888
 889                                 # Fetch data and form into an associative array
 890                                 # non-existent = broken
 891                                 # 1 = known
 892                                 # 2 = stub
 893                                 while ( $s = $dbr->fetchObject($res) ) {
 894                                         $title = Title::makeTitle( $s->cur_namespace, $s->cur_title );
 895                                         $pdbk = $title->getPrefixedDBkey();
 896                                         $wgLinkCache->addGoodLink( $s->cur_id, $pdbk );
 897
 898                                         if ( $threshold >  0 ) {
 899                                                 $size = $s->cur_len;
 900                                                 if ( $s->cur_is_redirect || $s->cur_namespace != 0 || $length < $threshold ) {
 901                                                         $colours[$pdbk] = 1;
 902                                                 } else {
 903                                                         $colours[$pdbk] = 2;
 904                                                 }
 905                                         } else {
 906                                                 $colours[$pdbk] = 1;
 907                                         }
 908                                 }
 909                         }
 910                         wfProfileOut( $fname.'-check' );
 911
 912                         # Construct search and replace arrays
 913                         wfProfileIn( $fname.'-construct' );
 914                         global $outputReplace;
 915                         $outputReplace = array();
 916                         foreach ( $namespaces as $key => $ns ) {
 917                                 $pdbk = $pdbks[$key];
 918                                 $searchkey = $tmpLinks[0][$key];
 919                                 $title = $titles[$key];
 920                                 if ( empty( $colours[$pdbk] ) ) {
 921                                         $wgLinkCache->addBadLink( $pdbk );
 922                                         $colours[$pdbk] = 0;
 923                                         $outputReplace[$searchkey] = $sk->makeBrokenLinkObj( $title, $texts[$key], $queries[$key] );
 924                                 } elseif ( $colours[$pdbk] == 1 ) {
 925                                         $outputReplace[$searchkey] = $sk->makeKnownLinkObj( $title, $texts[$key], $queries[$key] );
 926                                 } elseif ( $colours[$pdbk] == 2 ) {
 927                                         $outputReplace[$searchkey] = $sk->makeStubLinkObj( $title, $texts[$key], $queries[$key] );
 928                                 }
 929                         }
 930                         wfProfileOut( $fname.'-construct' );
 931
 932                         # Do the thing
 933                         wfProfileIn( $fname.'-replace' );
 934
 935                         $text = preg_replace_callback(
 936                                 '/(<!--LINK .*? .*? .*? .*?-->)/',
 937                                 "outputReplaceMatches",
 938                                 $text);
 939                         wfProfileOut( $fname.'-replace' );
 940                 }
 941                 wfProfileOut( $fname );
 942                 return $colours;
 943         }
 944 }
 945
 946 function &outputReplaceMatches($matches) {
 947         global $outputReplace;
 948         return $outputReplace[$matches[1]];
 949 }
 950
 951 }
 952 ?>