includes/OutputPage.php

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