includes/OutputPage.php

   1 <?php
   2 /**
   3  *
   4  */
   5
   6 /**
   7  * This is not a valid entry point, perform no further processing unless MEDIAWIKI is defined
   8  */
   9 if( defined( 'MEDIAWIKI' ) ) {
  10
  11 # See design.doc
  12
  13 if($wgUseTeX) require_once( 'Math.php' );
  14
  15 define( 'RLH_FOR_UPDATE', 1 );
  16
  17 /**
  18  * @todo document
  19  */
  20 class OutputPage {
  21         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
  22         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  23         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  24         var $mSubtitle, $mRedirect;
  25         var $mLastModified, $mCategoryLinks;
  26         var $mScripts, $mLinkColours;
  27
  28         var $mSuppressQuickbar;
  29         var $mOnloadHandler;
  30         var $mDoNothing;
  31         var $mContainsOldMagic, $mContainsNewMagic;
  32         var $mIsArticleRelated;
  33         var $mParserOptions;
  34         var $mShowFeedLinks = false;
  35         var $mEnableClientCache = true;
  36
  37         function OutputPage()
  38         {
  39                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  40                 $this->mKeywords = $this->mLinktags = array();
  41                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  42                 $this->mRedirect = $this->mLastModified =
  43                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  44                 $this->mOnloadHandler = "";
  45                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  46                 $this->mSuppressQuickbar = $this->mPrintable = false;
  47                 $this->mLanguageLinks = array();
  48                 $this->mCategoryLinks = array() ;
  49                 $this->mDoNothing = false;
  50                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  51                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  52                 $this->mSquidMaxage = 0;
  53                 $this->mScripts = "";
  54         }
  55
  56         function addHeader( $name, $val ) { array_push( $this->mHeaders, "$name: $val" ) ; }
  57         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  58         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  59
  60         # To add an http-equiv meta tag, precede the name with "http:"
  61         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  62         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  63         function addScript( $script ) { $this->mScripts .= $script; }
  64         function getScript() { return $this->mScripts; }
  65
  66         function addLink( $linkarr ) {
  67                 # $linkarr should be an associative array of attributes. We'll escape on output.
  68                 array_push( $this->mLinktags, $linkarr );
  69         }
  70
  71         function addMetadataLink( $linkarr ) {
  72                 # note: buggy CC software only reads first "meta" link
  73                 static $haveMeta = false;
  74                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  75                 $this->addLink( $linkarr );
  76                 $haveMeta = true;
  77         }
  78
  79         /**
  80          * checkLastModified tells the client to use the client-cached page if
  81          * possible. If sucessful, the OutputPage is disabled so that
  82          * any future call to OutputPage->output() have no effect. The method
  83          * returns true iff cache-ok headers was sent.
  84          */
  85         function checkLastModified ( $timestamp )
  86         {
  87                 global $wgLang, $wgCachePages, $wgUser;
  88                 if( !$wgCachePages ) {
  89                         wfDebug( "CACHE DISABLED\n", false );
  90                         return;
  91                 }
  92                 if( preg_match( '/MSIE ([1-4]|5\.0)/', $_SERVER["HTTP_USER_AGENT"] ) ) {
  93                         # IE 5.0 has probs with our caching
  94                         wfDebug( "-- bad client, not caching\n", false );
  95                         return;
  96                 }
  97                 if( $wgUser->getOption( 'nocache' ) ) {
  98                         wfDebug( "USER DISABLED CACHE\n", false );
  99                         return;
 100                 }
 101
 102                 $lastmod = gmdate( "D, j M Y H:i:s", wfTimestamp2Unix( max( $timestamp, $wgUser->mTouched ) ) ) . " GMT";
 103
 104                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 105                         # IE sends sizes after the date like this:
 106                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 107                         # this breaks strtotime().
 108                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 109                         $ismodsince = wfUnix2Timestamp( strtotime( $modsince ) );
 110                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 111                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 112
 113                         if( ($ismodsince >= $timestamp ) and $wgUser->validateCache( $ismodsince ) ) {
 114                                 # Make sure you're in a place you can leave when you call us!
 115                                 header( "HTTP/1.0 304 Not Modified" );
 116                                 $this->mLastModified = $lastmod;
 117                                 $this->sendCacheControl();
 118                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 119                                 $this->disable();
 120                                 return true;
 121                         } else {
 122                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 123                                 $this->mLastModified = $lastmod;
 124                         }
 125                 } else {
 126                         wfDebug( "We're confused.\n", false );
 127                         $this->mLastModified = $lastmod;
 128                 }
 129         }
 130
 131         function getPageTitleActionText () {
 132                 global $action;
 133                 switch($action) {
 134                         case 'edit':
 135                                 return wfMsg('edit');
 136                         case 'history':
 137                                 return wfMsg('history_short');
 138                         case 'protect':
 139                                 return wfMsg('protect');
 140                         case 'unprotect':
 141                                 return wfMsg('unprotect');
 142                         case 'delete':
 143                                 return wfMsg('delete');
 144                         case 'watch':
 145                                 return wfMsg('watch');
 146                         case 'unwatch':
 147                                 return wfMsg('unwatch');
 148                         case 'submit':
 149                                 return wfMsg('preview');
 150                         case 'info':
 151                                 return wfMsg('info_short');
 152                         default:
 153                                 return '';
 154                 }
 155         }
 156         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 157         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 158         function setPageTitle( $name ) {
 159                 global $action;
 160                 $this->mPagetitle = $name;
 161                 if(!empty($action)) {
 162                         $taction =  $this->getPageTitleActionText();
 163                         if( !empty( $taction ) ) {
 164                                 $name .= ' - '.$taction;
 165                         }
 166                 }
 167                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 168         }
 169         function getHTMLTitle() { return $this->mHTMLtitle; }
 170         function getPageTitle() { return $this->mPagetitle; }
 171         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 172         function getSubtitle() { return $this->mSubtitle; }
 173         function isArticle() { return $this->mIsarticle; }
 174         function setPrintable() { $this->mPrintable = true; }
 175         function isPrintable() { return $this->mPrintable; }
 176         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 177         function isSyndicated() { return $this->mShowFeedLinks; }
 178         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 179         function getOnloadHandler() { return $this->mOnloadHandler; }
 180         function disable() { $this->mDoNothing = true; }
 181
 182         function setArticleRelated( $v )
 183         {
 184                 $this->mIsArticleRelated = $v;
 185                 if ( !$v ) {
 186                         $this->mIsarticle = false;
 187                 }
 188         }
 189         function setArticleFlag( $v ) {
 190                 $this->mIsarticle = $v;
 191                 if ( $v ) {
 192                         $this->mIsArticleRelated = $v;
 193                 }
 194         }
 195
 196         function isArticleRelated()
 197         {
 198                 return $this->mIsArticleRelated;
 199         }
 200
 201         function getLanguageLinks() {
 202                 return $this->mLanguageLinks;
 203         }
 204         function addLanguageLinks($newLinkArray) {
 205                 $this->mLanguageLinks += $newLinkArray;
 206         }
 207         function setLanguageLinks($newLinkArray) {
 208                 $this->mLanguageLinks = $newLinkArray;
 209         }
 210         function getCategoryLinks() {
 211                 return $this->mCategoryLinks;
 212         }
 213         function addCategoryLinks($newLinkArray) {
 214                 $this->mCategoryLinks += $newLinkArray;
 215         }
 216         function setCategoryLinks($newLinkArray) {
 217                 $this->mCategoryLinks += $newLinkArray;
 218         }
 219
 220         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 221         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 222
 223         function addHTML( $text ) { $this->mBodytext .= $text; }
 224         function debug( $text ) { $this->mDebugtext .= $text; }
 225
 226         function setParserOptions( $options )
 227         {
 228                 return wfSetVar( $this->mParserOptions, $options );
 229         }
 230
 231         /**
 232          * Convert wikitext to HTML and add it to the buffer
 233          */
 234         function addWikiText( $text, $linestart = true )
 235         {
 236                 global $wgParser, $wgTitle;
 237
 238                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 239                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 240                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 241                 $this->addHTML( $parserOutput->getText() );
 242         }
 243
 244         /**
 245          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 246          * Saves the text into the parser cache if possible
 247          */
 248         function addPrimaryWikiText( $text, $cacheArticle ) {
 249                 global $wgParser, $wgParserCache, $wgUser, $wgTitle;
 250
 251                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 252
 253                 # Replace link holders
 254                 $text = $parserOutput->getText();
 255                 $this->replaceLinkHolders( $text );
 256                 $parserOutput->setText( $text );
 257
 258                 if ( $cacheArticle ) {
 259                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 260                 }
 261
 262                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 263                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 264                 $this->addHTML( $text );
 265         }
 266
 267         function tryParserCache( $article, $user ) {
 268                 global $wgParserCache;
 269                 $parserOutput = $wgParserCache->get( $article, $user );
 270                 if ( $parserOutput !== false ) {
 271                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 272                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 273                         $this->addHTML( $parserOutput->getText() );
 274                         return true;
 275                 } else {
 276                         return false;
 277                 }
 278         }
 279
 280         /**
 281          * Set the maximum cache time on the Squid in seconds
 282          */
 283         function setSquidMaxage( $maxage ) {
 284                 $this->mSquidMaxage = $maxage;
 285         }
 286
 287         /**
 288          * Use enableClientCache(false) to force it to send nocache headers
 289          */
 290         function enableClientCache( $state ) {
 291                 return wfSetVar( $this->mEnableClientCache, $state );
 292         }
 293
 294         function sendCacheControl() {
 295                 global $wgUseSquid, $wgUseESI;
 296                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 297                 header( 'Vary: Accept-Encoding, Cookie' );
 298                 if( $this->mEnableClientCache ) {
 299                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 300                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 301                         {
 302                                 if ( $wgUseESI ) {
 303                                         # We'll purge the proxy cache explicitly, but require end user agents
 304                                         # to revalidate against the proxy on each visit.
 305                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 306                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 307                                         # start with a shorter timeout for initial testing
 308                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 309                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 310                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 311                                 } else {
 312                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 313                                         # to revalidate against the proxy on each visit.
 314                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 315                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 316                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 317                                         # start with a shorter timeout for initial testing
 318                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 319                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 320                                 }
 321                         } else {
 322                                 # We do want clients to cache if they can, but they *must* check for updates
 323                                 # on revisiting the page.
 324                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 325                                 header( "Expires: -1" );
 326                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 327                         }
 328                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 329                 } else {
 330                         wfDebug( "** no caching **\n", false );
 331
 332                         # In general, the absence of a last modified header should be enough to prevent
 333                         # the client from using its cache. We send a few other things just to make sure.
 334                         header( 'Expires: -1' );
 335                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 336                         header( 'Pragma: no-cache' );
 337                 }
 338         }
 339
 340         /**
 341          * Finally, all the text has been munged and accumulated into
 342          * the object, let's actually output it:
 343          */
 344         function output()
 345         {
 346                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 347                 global $wgInputEncoding, $wgOutputEncoding, $wgLanguageCode;
 348                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 349                 if( $this->mDoNothing ){
 350                         return;
 351                 }
 352                 $fname = 'OutputPage::output';
 353                 wfProfileIn( $fname );
 354
 355                 $sk = $wgUser->getSkin();
 356
 357                 if ( '' != $this->mRedirect ) {
 358                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 359                                 # Standards require redirect URLs to be absolute
 360                                 global $wgServer;
 361                                 $this->mRedirect = $wgServer . $this->mRedirect;
 362                         }
 363                         if( $this->mRedirectCode == '301') {
 364                                 if( !$wgDebugRedirects ) {
 365                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 366                                 }
 367                                 $this->mLastModified = gmdate( 'D, j M Y H:i:s' ) . ' GMT';
 368                         }
 369
 370                         $this->sendCacheControl();
 371
 372                         if( $wgDebugRedirects ) {
 373                                 $url = htmlspecialchars( $this->mRedirect );
 374                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 375                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 376                                 print "</body>\n</html>\n";
 377                         } else {
 378                                 header( 'Location: '.$this->mRedirect );
 379                         }
 380                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 381                         return;
 382                 }
 383
 384
 385                 $this->sendCacheControl();
 386                 # Perform link colouring
 387                 $this->transformBuffer();
 388
 389                 # Disable temporary placeholders, so that the skin produces HTML
 390                 $sk->postParseLinkColour( false );
 391
 392                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 393                 header( 'Content-language: '.$wgLanguageCode );
 394
 395                 $exp = time() + $wgCookieExpiration;
 396                 foreach( $this->mCookies as $name => $val ) {
 397                         setcookie( $name, $val, $exp, '/' );
 398                 }
 399
 400                 $sk->outputPage( $this );
 401                 # flush();
 402         }
 403
 404         function out( $ins ) {
 405                 global $wgInputEncoding, $wgOutputEncoding, $wgLang;
 406                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 407                         $outs = $ins;
 408                 } else {
 409                         $outs = $wgLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 410                         if ( false === $outs ) { $outs = $ins; }
 411                 }
 412                 print $outs;
 413         }
 414
 415         function setEncodings() {
 416                 global $wgInputEncoding, $wgOutputEncoding;
 417                 global $wgUser, $wgLang;
 418
 419                 $wgInputEncoding = strtolower( $wgInputEncoding );
 420
 421                 if( $wgUser->getOption( 'altencoding' ) ) {
 422                         $wgLang->setAltEncoding();
 423                         return;
 424                 }
 425
 426                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 427                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 428                         return;
 429                 }
 430
 431                 /*
 432                 # This code is unused anyway!
 433                 # Commenting out. --bv 2003-11-15
 434
 435                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 436                 $best = 0.0;
 437                 $bestset = "*";
 438
 439                 foreach ( $a as $s ) {
 440                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 441                                 $set = $m[1];
 442                                 $q = (float)($m[2]);
 443                         } else {
 444                                 $set = $s;
 445                                 $q = 1.0;
 446                         }
 447                         if ( $q > $best ) {
 448                                 $bestset = $set;
 449                                 $best = $q;
 450                         }
 451                 }
 452                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 453                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 454                 $wgOutputEncoding = strtolower( $bestset );
 455
 456 # Disable for now
 457 #
 458                 */
 459                 $wgOutputEncoding = $wgInputEncoding;
 460         }
 461
 462         /**
 463          * Returns a HTML comment with the elapsed time since request.
 464          * This method has no side effects.
 465          */
 466         function reportTime() {
 467                 global $wgRequestTime;
 468
 469                 $now = wfTime();
 470                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 471                 $start = (float)$sec + (float)$usec;
 472                 $elapsed = $now - $start;
 473
 474                 # Use real server name if available, so we know which machine
 475                 # in a server farm generated the current page.
 476                 if ( function_exists( 'posix_uname' ) ) {
 477                         $uname = @posix_uname();
 478                 } else {
 479                         $uname = false;
 480                 }
 481                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 482                         $hostname = $uname['nodename'];
 483                 } else {
 484                         # This may be a virtual server.
 485                         $hostname = $_SERVER['SERVER_NAME'];
 486                 }
 487                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 488                   $hostname, $elapsed );
 489                 return $com;
 490         }
 491
 492         /**
 493          * Note: these arguments are keys into wfMsg(), not text!
 494          */
 495         function errorpage( $title, $msg ) {
 496                 global $wgTitle;
 497
 498                 $this->mDebugtext .= 'Original title: ' .
 499                   $wgTitle->getPrefixedText() . "\n";
 500                 $this->setPageTitle( wfMsg( $title ) );
 501                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 502                 $this->setRobotpolicy( 'noindex,nofollow' );
 503                 $this->setArticleRelated( false );
 504                 $this->enableClientCache( false );
 505                 $this->mRedirect = '';
 506
 507                 $this->mBodytext = '';
 508                 $this->addHTML( '<p>' . wfMsg( $msg ) . "</p>\n" );
 509                 $this->returnToMain( false );
 510
 511                 $this->output();
 512                 wfErrorExit();
 513         }
 514
 515         function sysopRequired() {
 516                 global $wgUser;
 517
 518                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 519                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 520                 $this->setRobotpolicy( 'noindex,nofollow' );
 521                 $this->setArticleRelated( false );
 522                 $this->mBodytext = '';
 523
 524                 $sk = $wgUser->getSkin();
 525                 $ap = $sk->makeKnownLink( wfMsg( 'administrators' ), '' );
 526                 $this->addHTML( wfMsg( 'sysoptext', $ap ) );
 527                 $this->returnToMain();
 528         }
 529
 530         function developerRequired() {
 531                 global $wgUser;
 532
 533                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 534                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 535                 $this->setRobotpolicy( 'noindex,nofollow' );
 536                 $this->setArticleRelated( false );
 537                 $this->mBodytext = '';
 538
 539                 $sk = $wgUser->getSkin();
 540                 $ap = $sk->makeKnownLink( wfMsg( 'administrators' ), '' );
 541                 $this->addHTML( wfMsg( 'developertext', $ap ) );
 542                 $this->returnToMain();
 543         }
 544
 545         function loginToUse() {
 546                 global $wgUser, $wgTitle, $wgLang;
 547
 548                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 549                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 550                 $this->setRobotpolicy( 'noindex,nofollow' );
 551                 $this->setArticleFlag( false );
 552                 $this->mBodytext = '';
 553                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 554
 555                 # We put a comment in the .html file so a Sysop can diagnose the page the
 556                 # user can't see.
 557                 $this->addHTML( "\n<!--" .
 558                                                 $wgLang->getNsText( $wgTitle->getNamespace() ) .
 559                                                 ':' .
 560                                                 $wgTitle->getDBkey() . '-->' );
 561                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 562         }
 563
 564         function databaseError( $fname, $sql, $error, $errno ) {
 565                 global $wgUser, $wgCommandLineMode;
 566
 567                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 568                 $this->setRobotpolicy( 'noindex,nofollow' );
 569                 $this->setArticleRelated( false );
 570                 $this->enableClientCache( false );
 571                 $this->mRedirect = '';
 572
 573                 if ( $wgCommandLineMode ) {
 574                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 575                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 576                 } else {
 577                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 578                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 579                 }
 580
 581                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 582                         print $msg."\n";
 583                         wfErrorExit();
 584                 }
 585                 $this->mBodytext = $msg;
 586                 $this->output();
 587                 wfErrorExit();
 588         }
 589
 590         function readOnlyPage( $source = null, $protected = false ) {
 591                 global $wgUser, $wgReadOnlyFile;
 592
 593                 $this->setRobotpolicy( 'noindex,nofollow' );
 594                 $this->setArticleRelated( false );
 595
 596                 if( $protected ) {
 597                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 598                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 599                 } else {
 600                         $this->setPageTitle( wfMsg( 'readonly' ) );
 601                         $reason = file_get_contents( $wgReadOnlyFile );
 602                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 603                 }
 604
 605                 if( is_string( $source ) ) {
 606                         if( strcmp( $source, '' ) == 0 ) {
 607                                 $source = wfMsg( 'noarticletext' );
 608                         }
 609                         $rows = $wgUser->getOption( 'rows' );
 610                         $cols = $wgUser->getOption( 'cols' );
 611                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 612                                 htmlspecialchars( $source ) . "\n</textarea>";
 613                         $this->addHTML( $text );
 614                 }
 615
 616                 $this->returnToMain( false );
 617         }
 618
 619         function fatalError( $message ) {
 620                 $this->setPageTitle( wfMsg( "internalerror" ) );
 621                 $this->setRobotpolicy( "noindex,nofollow" );
 622                 $this->setArticleRelated( false );
 623                 $this->enableClientCache( false );
 624                 $this->mRedirect = '';
 625
 626                 $this->mBodytext = $message;
 627                 $this->output();
 628                 wfErrorExit();
 629         }
 630
 631         function unexpectedValueError( $name, $val ) {
 632                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 633         }
 634
 635         function fileCopyError( $old, $new ) {
 636                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 637         }
 638
 639         function fileRenameError( $old, $new ) {
 640                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 641         }
 642
 643         function fileDeleteError( $name ) {
 644                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 645         }
 646
 647         function fileNotFoundError( $name ) {
 648                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 649         }
 650
 651         /**
 652          * return from error messages or notes
 653          * @param $auto automatically redirect the user after 10 seconds
 654          * @param $returnto page title to return to. Default is Main Page.
 655          */
 656         function returnToMain( $auto = true, $returnto = NULL ) {
 657                 global $wgUser, $wgOut, $wgRequest;
 658
 659                 if ( $returnto == NULL ) {
 660                         $returnto = $wgRequest->getText( 'returnto' );
 661                 }
 662
 663                 $sk = $wgUser->getSkin();
 664                 if ( '' == $returnto ) {
 665                         $returnto = wfMsg( 'mainpage' );
 666                 }
 667                 $link = $sk->makeKnownLink( $returnto, '' );
 668
 669                 $r = wfMsg( 'returnto', $link );
 670                 if ( $auto ) {
 671                         $titleObj = Title::newFromText( $returnto );
 672                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 673                 }
 674                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 675         }
 676
 677         /**
 678          * This function takes the existing and broken links for the page
 679          * and uses the first 10 of them for META keywords
 680          */
 681         function addMetaTags () {
 682                 global $wgLinkCache , $wgOut ;
 683                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 684                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 685                 $a = array_merge ( $good , $bad ) ;
 686                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 687                 $a = implode ( ',' , $a ) ;
 688                 $strip = array(
 689                         "/<.*?" . ">/" => '',
 690                         "/[_]/" => ' '
 691                 );
 692                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 693
 694                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 695         }
 696
 697         /**
 698          * @private
 699          */
 700         function headElement() {
 701                 global $wgDocType, $wgDTD, $wgLanguageCode, $wgOutputEncoding, $wgMimeType;
 702                 global $wgUser, $wgLang, $wgRequest;
 703
 704                 $xml = ($wgMimeType == 'text/xml');
 705                 if( $xml ) {
 706                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 707                 } else {
 708                         $ret = '';
 709                 }
 710
 711                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 712
 713                 if ( "" == $this->mHTMLtitle ) {
 714                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 715                 }
 716                 if( $xml ) {
 717                         $xmlbits = "xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\"";
 718                 } else {
 719                         $xmlbits = '';
 720                 }
 721                 $rtl = $wgLang->isRTL() ? " dir='RTL'" : '';
 722                 $ret .= "<html $xmlbits lang=\"$wgLanguageCode\" $rtl>\n";
 723                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 724                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 725
 726                 $ret .= $this->getHeadLinks();
 727                 global $wgStylePath;
 728                 if( $this->isPrintable() ) {
 729                         $media = '';
 730                 } else {
 731                         $media = "media='print'";
 732                 }
 733                 $printsheet = htmlspecialchars( "$wgStylePath/wikiprintable.css" );
 734                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 735
 736                 $sk = $wgUser->getSkin();
 737                 $ret .= $sk->getHeadScripts();
 738                 $ret .= $this->mScripts;
 739                 $ret .= $sk->getUserStyles();
 740
 741                 $ret .= "</head>\n";
 742                 return $ret;
 743         }
 744
 745         function getHeadLinks() {
 746                 global $wgRequest, $wgStylePath;
 747                 $ret = '';
 748                 foreach ( $this->mMetatags as $tag ) {
 749                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 750                                 $a = 'http-equiv';
 751                                 $tag[0] = substr( $tag[0], 5 );
 752                         } else {
 753                                 $a = 'name';
 754                         }
 755                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 756                 }
 757                 $p = $this->mRobotpolicy;
 758                 if ( '' == $p ) { $p = 'index,follow'; }
 759                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 760
 761                 if ( count( $this->mKeywords ) > 0 ) {
 762                         $strip = array(
 763                                 "/<.*?" . ">/" => '',
 764                                 "/[_]/" => ' '
 765                         );
 766                         $ret .= "<meta name=\"keywords\" content=\"" .
 767                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 768                 }
 769                 foreach ( $this->mLinktags as $tag ) {
 770                         $ret .= '<link';
 771                         foreach( $tag as $attr => $val ) {
 772                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 773                         }
 774                         $ret .= " />\n";
 775                 }
 776                 if( $this->isSyndicated() ) {
 777                         # FIXME: centralize the mime-type and name information in Feed.php
 778                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 779                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 780                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 781                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 782                 }
 783                 # FIXME: get these working
 784                 # $fix = htmlspecialchars( $wgStylePath . "/ie-png-fix.js" );
 785                 # $ret .= "<!--[if gte IE 5.5000]><script type='text/javascript' src='$fix'>< /script><![endif]-->";
 786                 return $ret;
 787         }
 788
 789         /**
 790          * Run any necessary pre-output transformations on the buffer text
 791          */
 792         function transformBuffer( $options = 0 ) {
 793                 $this->replaceLinkHolders( $this->mBodytext, $options );
 794         }
 795
 796         /**
 797          * Replace <!--LINK--> link placeholders with actual links, in the buffer
 798          * Placeholders created in Skin::makeLinkObj()
 799          * Returns an array of links found, indexed by PDBK:
 800          *  0 - broken
 801          *  1 - normal link
 802          *  2 - stub
 803          * $options is a bit field, RLH_FOR_UPDATE to select for update
 804          */
 805         function replaceLinkHolders( &$text, $options = 0 ) {
 806                 global $wgUser, $wgLinkCache, $wgUseOldExistenceCheck;
 807
 808                 if ( $wgUseOldExistenceCheck ) {
 809                         return array();
 810                 }
 811
 812                 $fname = 'OutputPage::replaceLinkHolders';
 813                 wfProfileIn( $fname );
 814
 815                 $titles = array();
 816                 $pdbks = array();
 817                 $colours = array();
 818
 819                 # Get placeholders from body
 820                 wfProfileIn( $fname.'-match' );
 821                 preg_match_all( "/<!--LINK (.*?) (.*?) (.*?) (.*?)-->/", $text, $tmpLinks );
 822                 wfProfileOut( $fname.'-match' );
 823
 824                 if ( !empty( $tmpLinks[0] ) ) {
 825                         wfProfileIn( $fname.'-check' );
 826                         $dbr =& wfGetDB( DB_SLAVE );
 827                         $cur = $dbr->tableName( 'cur' );
 828                         $sk = $wgUser->getSkin();
 829                         $threshold = $wgUser->getOption('stubthreshold');
 830
 831                         $namespaces =& $tmpLinks[1];
 832                         $dbkeys =& $tmpLinks[2];
 833                         $queries =& $tmpLinks[3];
 834                         $texts =& $tmpLinks[4];
 835
 836                         # Sort by namespace
 837                         asort( $namespaces );
 838
 839                         # Generate query
 840                         $query = false;
 841                         foreach ( $namespaces as $key => $val ) {
 842                                 # Make title object
 843                                 $dbk = $dbkeys[$key];
 844                                 $title = $titles[$key] = Title::makeTitleSafe( $val, $dbk );
 845
 846                                 # Skip invalid entries.
 847                                 # Result will be ugly, but prevents crash.
 848                                 if ( is_null( $title ) ) {
 849                                         continue;
 850                                 }
 851                                 $pdbk = $pdbks[$key] = $title->getPrefixedDBkey();
 852
 853                                 # Check if it's in the link cache already
 854                                 if ( $wgLinkCache->getGoodLinkID( $pdbk ) ) {
 855                                         $colours[$pdbk] = 1;
 856                                 } elseif ( $wgLinkCache->isBadLink( $pdbk ) ) {
 857                                         $colours[$pdbk] = 0;
 858                                 } else {
 859                                         # Not in the link cache, add it to the query
 860                                         if ( !isset( $current ) ) {
 861                                                 $current = $val;
 862                                                 $query =  "SELECT cur_id, cur_namespace, cur_title";
 863                                                 if ( $threshold > 0 ) {
 864                                                         $query .= ", LENGTH(cur_text) AS cur_len, cur_is_redirect";
 865                                                 }
 866                                                 $query .= " FROM $cur WHERE (cur_namespace=$val AND cur_title IN(";
 867                                         } elseif ( $current != $val ) {
 868                                                 $current = $val;
 869                                                 $query .= ")) OR (cur_namespace=$val AND cur_title IN(";
 870                                         } else {
 871                                                 $query .= ', ';
 872                                         }
 873
 874                                         $query .= $dbr->addQuotes( $dbkeys[$key] );
 875                                 }
 876                         }
 877                         if ( $query ) {
 878                                 $query .= '))';
 879                                 if ( $options & RLH_FOR_UPDATE ) {
 880                                         $query .= ' FOR UPDATE';
 881                                 }
 882
 883                                 $res = $dbr->query( $query, $fname );
 884
 885                                 # Fetch data and form into an associative array
 886                                 # non-existent = broken
 887                                 # 1 = known
 888                                 # 2 = stub
 889                                 while ( $s = $dbr->fetchObject($res) ) {
 890                                         $title = Title::makeTitle( $s->cur_namespace, $s->cur_title );
 891                                         $pdbk = $title->getPrefixedDBkey();
 892                                         $wgLinkCache->addGoodLink( $s->cur_id, $pdbk );
 893
 894                                         if ( $threshold >  0 ) {
 895                                                 $size = $s->cur_len;
 896                                                 if ( $s->cur_is_redirect || $s->cur_namespace != 0 || $length < $threshold ) {
 897                                                         $colours[$pdbk] = 1;
 898                                                 } else {
 899                                                         $colours[$pdbk] = 2;
 900                                                 }
 901                                         } else {
 902                                                 $colours[$pdbk] = 1;
 903                                         }
 904                                 }
 905                         }
 906                         wfProfileOut( $fname.'-check' );
 907
 908                         # Construct search and replace arrays
 909                         wfProfileIn( $fname.'-construct' );
 910                         global $outputReplace;
 911                         $outputReplace = array();
 912                         foreach ( $namespaces as $key => $ns ) {
 913                                 $pdbk = $pdbks[$key];
 914                                 $searchkey = $tmpLinks[0][$key];
 915                                 $title = $titles[$key];
 916                                 if ( empty( $colours[$pdbk] ) ) {
 917                                         $wgLinkCache->addBadLink( $pdbk );
 918                                         $colours[$pdbk] = 0;
 919                                         $outputReplace[$searchkey] = $sk->makeBrokenLinkObj( $title, $texts[$key], $queries[$key] );
 920                                 } elseif ( $colours[$pdbk] == 1 ) {
 921                                         $outputReplace[$searchkey] = $sk->makeKnownLinkObj( $title, $texts[$key], $queries[$key] );
 922                                 } elseif ( $colours[$pdbk] == 2 ) {
 923                                         $outputReplace[$searchkey] = $sk->makeStubLinkObj( $title, $texts[$key], $queries[$key] );
 924                                 }
 925                         }
 926                         wfProfileOut( $fname.'-construct' );
 927
 928                         # Do the thing
 929                         wfProfileIn( $fname.'-replace' );
 930
 931                         $text = preg_replace_callback(
 932                                 '/(<!--LINK .*? .*? .*? .*?-->)/',
 933                                 "outputReplaceMatches",
 934                                 $text);
 935                         wfProfileOut( $fname.'-replace' );
 936                 }
 937                 wfProfileOut( $fname );
 938                 return $colours;
 939         }
 940 }
 941
 942 function &outputReplaceMatches($matches) {
 943         global $outputReplace;
 944         return $outputReplace[$matches[1]];
 945 }
 946
 947 }
 948 ?>