includes/OutputPage.php

   1 <?php
   2 /**
   3  * @package MediaWiki
   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.txt
  12
  13 if($wgUseTeX) require_once( 'Math.php' );
  14
  15 /**
  16  * @todo document
  17  * @package MediaWiki
  18  */
  19 class OutputPage {
  20         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
  21         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  22         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  23         var $mSubtitle, $mRedirect;
  24         var $mLastModified, $mCategoryLinks;
  25         var $mScripts, $mLinkColours;
  26
  27         var $mSuppressQuickbar;
  28         var $mOnloadHandler;
  29         var $mDoNothing;
  30         var $mContainsOldMagic, $mContainsNewMagic;
  31         var $mIsArticleRelated;
  32         var $mParserOptions;
  33         var $mShowFeedLinks = false;
  34         var $mEnableClientCache = true;
  35
  36         /**
  37          * Constructor
  38          * Initialise private variables
  39          */
  40         function OutputPage() {
  41                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  42                 $this->mKeywords = $this->mLinktags = array();
  43                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  44                 $this->mRedirect = $this->mLastModified =
  45                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  46                 $this->mOnloadHandler = '';
  47                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  48                 $this->mSuppressQuickbar = $this->mPrintable = false;
  49                 $this->mLanguageLinks = array();
  50                 $this->mCategoryLinks = array() ;
  51                 $this->mDoNothing = false;
  52                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  53                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  54                 $this->mSquidMaxage = 0;
  55                 $this->mScripts = '';
  56         }
  57
  58         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
  59         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  60         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  61
  62         # To add an http-equiv meta tag, precede the name with "http:"
  63         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  64         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  65         function addScript( $script ) { $this->mScripts .= $script; }
  66         function getScript() { return $this->mScripts; }
  67
  68         function addLink( $linkarr ) {
  69                 # $linkarr should be an associative array of attributes. We'll escape on output.
  70                 array_push( $this->mLinktags, $linkarr );
  71         }
  72
  73         function addMetadataLink( $linkarr ) {
  74                 # note: buggy CC software only reads first "meta" link
  75                 static $haveMeta = false;
  76                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  77                 $this->addLink( $linkarr );
  78                 $haveMeta = true;
  79         }
  80
  81         /**
  82          * checkLastModified tells the client to use the client-cached page if
  83          * possible. If sucessful, the OutputPage is disabled so that
  84          * any future call to OutputPage->output() have no effect. The method
  85          * returns true iff cache-ok headers was sent.
  86          */
  87         function checkLastModified ( $timestamp ) {
  88                 global $wgLang, $wgCachePages, $wgUser;
  89                 if ( !$timestamp || $timestamp == '19700101000000' ) {
  90                         wfDebug( "CACHE DISABLED, NO TIMESTAMP\n" );
  91                         return;
  92                 }
  93                 if( !$wgCachePages ) {
  94                         wfDebug( "CACHE DISABLED\n", false );
  95                         return;
  96                 }
  97                 if( $wgUser->getOption( 'nocache' ) ) {
  98                         wfDebug( "USER DISABLED CACHE\n", false );
  99                         return;
 100                 }
 101
 102                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 103                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
 104
 105                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 106                         # IE sends sizes after the date like this:
 107                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 108                         # this breaks strtotime().
 109                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 110                         $ismodsince = wfTimestamp( TS_MW, strtotime( $modsince ) );
 111                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 112                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 113                         if( ($ismodsince >= $timestamp ) && $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( "client did not send If-Modified-Since header\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
 157         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 158         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 159         function setPageTitle( $name ) {
 160                 global $action, $wgContLang;
 161                 $name = $wgContLang->convert($name, true);
 162                 $this->mPagetitle = $name;
 163                 if(!empty($action)) {
 164                         $taction =  $this->getPageTitleActionText();
 165                         if( !empty( $taction ) ) {
 166                                 $name .= ' - '.$taction;
 167                         }
 168                 }
 169                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 170         }
 171         function getHTMLTitle() { return $this->mHTMLtitle; }
 172         function getPageTitle() { return $this->mPagetitle; }
 173         function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 174         function getSubtitle() { return $this->mSubtitle; }
 175         function isArticle() { return $this->mIsarticle; }
 176         function setPrintable() { $this->mPrintable = true; }
 177         function isPrintable() { return $this->mPrintable; }
 178         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 179         function isSyndicated() { return $this->mShowFeedLinks; }
 180         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 181         function getOnloadHandler() { return $this->mOnloadHandler; }
 182         function disable() { $this->mDoNothing = true; }
 183
 184         function setArticleRelated( $v ) {
 185                 $this->mIsArticleRelated = $v;
 186                 if ( !$v ) {
 187                         $this->mIsarticle = false;
 188                 }
 189         }
 190         function setArticleFlag( $v ) {
 191                 $this->mIsarticle = $v;
 192                 if ( $v ) {
 193                         $this->mIsArticleRelated = $v;
 194                 }
 195         }
 196
 197         function isArticleRelated() { return $this->mIsArticleRelated; }
 198
 199         function getLanguageLinks() { return $this->mLanguageLinks; }
 200         function addLanguageLinks($newLinkArray) {
 201                 $this->mLanguageLinks += $newLinkArray;
 202         }
 203         function setLanguageLinks($newLinkArray) {
 204                 $this->mLanguageLinks = $newLinkArray;
 205         }
 206
 207         function getCategoryLinks() {
 208                 return $this->mCategoryLinks;
 209         }
 210         function addCategoryLinks($newLinkArray) {
 211                 $this->mCategoryLinks += $newLinkArray;
 212         }
 213         function setCategoryLinks($newLinkArray) {
 214                 $this->mCategoryLinks += $newLinkArray;
 215         }
 216
 217         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 218         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 219
 220         function addHTML( $text ) { $this->mBodytext .= $text; }
 221         function clearHTML() { $this->mBodytext = ''; }
 222         function getHTML() { return $this->mBodytext; }
 223         function debug( $text ) { $this->mDebugtext .= $text; }
 224
 225         function setParserOptions( $options ) {
 226                 return wfSetVar( $this->mParserOptions, $options );
 227         }
 228
 229         /**
 230          * Convert wikitext to HTML and add it to the buffer
 231          * Default assumes that the current page title will
 232          * be used.
 233          */
 234         function addWikiText( $text, $linestart = true ) {
 235                 global $wgTitle;
 236                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 237         }
 238
 239         function addWikiTextWithTitle($text, &$title, $linestart = true) {
 240                 $this->addWikiTextTitle($text, $title, $linestart);
 241         }
 242
 243         function addWikiTextTitle($text, &$title, $linestart) {
 244                 global $wgParser, $wgUseTidy;
 245                 $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions, $linestart );
 246                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 247                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 248                 if ( $parserOutput->getCacheTime() == -1 ) {
 249                         $this->enableClientCache( false );
 250                 }
 251                 $this->addHTML( $parserOutput->getText() );
 252         }
 253
 254         /**
 255          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 256          * Saves the text into the parser cache if possible
 257          */
 258         function addPrimaryWikiText( $text, $cacheArticle ) {
 259                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 260
 261                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 262
 263                 $text = $parserOutput->getText();
 264
 265                 if ( $cacheArticle && $parserOutput->getCacheTime() != -1 ) {
 266                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 267                 }
 268
 269                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 270                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 271                 if ( $parserOutput->getCacheTime() == -1 ) {
 272                         $this->enableClientCache( false );
 273                 }
 274                 $this->addHTML( $text );
 275         }
 276
 277         /**
 278          * Add the output of a QuickTemplate to the output buffer
 279          * @param QuickTemplate $template
 280          */
 281         function addTemplate( &$template ) {
 282                 ob_start();
 283                 $template->execute();
 284                 $this->addHtml( ob_get_contents() );
 285                 ob_end_clean();
 286         }
 287
 288         /**
 289          * Parse wikitext and return the HTML. This is for special pages that add the text later
 290          */
 291         function parse( $text, $linestart = true ) {
 292                 global $wgParser, $wgTitle;
 293                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 294                 return $parserOutput->getText();
 295         }
 296
 297         /**
 298          * @param $article
 299          * @param $user
 300          *
 301          * @return bool
 302          */
 303         function tryParserCache( $article, $user ) {
 304                 global $wgParserCache;
 305                 $parserOutput = $wgParserCache->get( $article, $user );
 306                 if ( $parserOutput !== false ) {
 307                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 308                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 309                         $this->addHTML( $parserOutput->getText() );
 310                         $t = $parserOutput->getTitleText();
 311                         if( !empty( $t ) ) {
 312                                 $this->setPageTitle( $t );
 313                         }
 314                         return true;
 315                 } else {
 316                         return false;
 317                 }
 318         }
 319
 320         /**
 321          * Set the maximum cache time on the Squid in seconds
 322          * @param $maxage
 323          */
 324         function setSquidMaxage( $maxage ) {
 325                 $this->mSquidMaxage = $maxage;
 326         }
 327
 328         /**
 329          * Use enableClientCache(false) to force it to send nocache headers
 330          * @param $state
 331          */
 332         function enableClientCache( $state ) {
 333                 return wfSetVar( $this->mEnableClientCache, $state );
 334         }
 335
 336         function sendCacheControl() {
 337                 global $wgUseSquid, $wgUseESI;
 338                 # don't serve compressed data to clients who can't handle it
 339                 # maintain different caches for logged-in users and non-logged in ones
 340                 header( 'Vary: Accept-Encoding, Cookie' );
 341                 if( $this->mEnableClientCache ) {
 342                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 343                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 344                         {
 345                                 if ( $wgUseESI ) {
 346                                         # We'll purge the proxy cache explicitly, but require end user agents
 347                                         # to revalidate against the proxy on each visit.
 348                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 349                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 350                                         # start with a shorter timeout for initial testing
 351                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 352                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 353                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 354                                 } else {
 355                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 356                                         # to revalidate against the proxy on each visit.
 357                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 358                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 359                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 360                                         # start with a shorter timeout for initial testing
 361                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 362                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 363                                 }
 364                         } else {
 365                                 # We do want clients to cache if they can, but they *must* check for updates
 366                                 # on revisiting the page.
 367                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 368                                 header( "Expires: -1" );
 369                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 370                         }
 371                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 372                 } else {
 373                         wfDebug( "** no caching **\n", false );
 374
 375                         # In general, the absence of a last modified header should be enough to prevent
 376                         # the client from using its cache. We send a few other things just to make sure.
 377                         header( 'Expires: -1' );
 378                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 379                         header( 'Pragma: no-cache' );
 380                 }
 381         }
 382
 383         /**
 384          * Finally, all the text has been munged and accumulated into
 385          * the object, let's actually output it:
 386          */
 387         function output() {
 388                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 389                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 390                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 391
 392                 if( $this->mDoNothing ){
 393                         return;
 394                 }
 395                 $fname = 'OutputPage::output';
 396                 wfProfileIn( $fname );
 397                 $sk = $wgUser->getSkin();
 398
 399                 if ( '' != $this->mRedirect ) {
 400                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 401                                 # Standards require redirect URLs to be absolute
 402                                 global $wgServer;
 403                                 $this->mRedirect = $wgServer . $this->mRedirect;
 404                         }
 405                         if( $this->mRedirectCode == '301') {
 406                                 if( !$wgDebugRedirects ) {
 407                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 408                                 }
 409                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 410                         }
 411
 412                         $this->sendCacheControl();
 413
 414                         if( $wgDebugRedirects ) {
 415                                 $url = htmlspecialchars( $this->mRedirect );
 416                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 417                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 418                                 print "</body>\n</html>\n";
 419                         } else {
 420                                 header( 'Location: '.$this->mRedirect );
 421                         }
 422                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 423                         return;
 424                 }
 425
 426
 427                 # Buffer output; final headers may depend on later processing
 428                 ob_start();
 429
 430                 $this->transformBuffer();
 431
 432                 # Disable temporary placeholders, so that the skin produces HTML
 433                 $sk->postParseLinkColour( false );
 434
 435                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 436                 header( 'Content-language: '.$wgContLanguageCode );
 437
 438                 $exp = time() + $wgCookieExpiration;
 439                 foreach( $this->mCookies as $name => $val ) {
 440                         setcookie( $name, $val, $exp, '/' );
 441                 }
 442
 443                 wfProfileIn( 'Output-skin' );
 444                 $sk->outputPage( $this );
 445                 wfProfileOut( 'Output-skin' );
 446
 447                 $this->sendCacheControl();
 448                 ob_end_flush();
 449         }
 450
 451         function out( $ins ) {
 452                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 453                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 454                         $outs = $ins;
 455                 } else {
 456                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 457                         if ( false === $outs ) { $outs = $ins; }
 458                 }
 459                 print $outs;
 460         }
 461
 462         function setEncodings() {
 463                 global $wgInputEncoding, $wgOutputEncoding;
 464                 global $wgUser, $wgContLang;
 465
 466                 $wgInputEncoding = strtolower( $wgInputEncoding );
 467
 468                 if( $wgUser->getOption( 'altencoding' ) ) {
 469                         $wgContLang->setAltEncoding();
 470                         return;
 471                 }
 472
 473                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 474                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 475                         return;
 476                 }
 477                 $wgOutputEncoding = $wgInputEncoding;
 478         }
 479
 480         /**
 481          * Returns a HTML comment with the elapsed time since request.
 482          * This method has no side effects.
 483          * @return string
 484          */
 485         function reportTime() {
 486                 global $wgRequestTime;
 487
 488                 $now = wfTime();
 489                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 490                 $start = (float)$sec + (float)$usec;
 491                 $elapsed = $now - $start;
 492
 493                 # Use real server name if available, so we know which machine
 494                 # in a server farm generated the current page.
 495                 if ( function_exists( 'posix_uname' ) ) {
 496                         $uname = @posix_uname();
 497                 } else {
 498                         $uname = false;
 499                 }
 500                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 501                         $hostname = $uname['nodename'];
 502                 } else {
 503                         # This may be a virtual server.
 504                         $hostname = $_SERVER['SERVER_NAME'];
 505                 }
 506                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 507                   $hostname, $elapsed );
 508                 return $com;
 509         }
 510
 511         /**
 512          * Note: these arguments are keys into wfMsg(), not text!
 513          */
 514         function errorpage( $title, $msg ) {
 515                 global $wgTitle;
 516
 517                 $this->mDebugtext .= 'Original title: ' .
 518                   $wgTitle->getPrefixedText() . "\n";
 519                 $this->setPageTitle( wfMsg( $title ) );
 520                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 521                 $this->setRobotpolicy( 'noindex,nofollow' );
 522                 $this->setArticleRelated( false );
 523                 $this->enableClientCache( false );
 524                 $this->mRedirect = '';
 525
 526                 $this->mBodytext = '';
 527                 $this->addWikiText( wfMsg( $msg ) );
 528                 $this->returnToMain( false );
 529
 530                 $this->output();
 531                 wfErrorExit();
 532         }
 533
 534         /**
 535          * Display an error page noting that a given permission bit is required.
 536          * This should generally replace the sysopRequired, developerRequired etc.
 537          * @param string $permission key required
 538          */
 539         function permissionRequired( $permission ) {
 540                 global $wgUser;
 541
 542                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 543                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 544                 $this->setRobotpolicy( 'noindex,nofollow' );
 545                 $this->setArticleRelated( false );
 546                 $this->mBodytext = '';
 547
 548                 $sk = $wgUser->getSkin();
 549                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ) );
 550                 $this->addHTML( wfMsgHtml( 'badaccesstext', $ap, $permission ) );
 551                 $this->returnToMain();
 552         }
 553
 554         /**
 555          * @deprecated
 556          */
 557         function sysopRequired() {
 558                 global $wgUser;
 559
 560                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 561                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 562                 $this->setRobotpolicy( 'noindex,nofollow' );
 563                 $this->setArticleRelated( false );
 564                 $this->mBodytext = '';
 565
 566                 $sk = $wgUser->getSkin();
 567                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 568                 $this->addHTML( wfMsgHtml( 'sysoptext', $ap ) );
 569                 $this->returnToMain();
 570         }
 571
 572         /**
 573          * @deprecated
 574          */
 575         function developerRequired() {
 576                 global $wgUser;
 577
 578                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 579                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 580                 $this->setRobotpolicy( 'noindex,nofollow' );
 581                 $this->setArticleRelated( false );
 582                 $this->mBodytext = '';
 583
 584                 $sk = $wgUser->getSkin();
 585                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 586                 $this->addHTML( wfMsgHtml( 'developertext', $ap ) );
 587                 $this->returnToMain();
 588         }
 589
 590         function loginToUse() {
 591                 global $wgUser, $wgTitle, $wgContLang;
 592
 593                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 594                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 595                 $this->setRobotpolicy( 'noindex,nofollow' );
 596                 $this->setArticleFlag( false );
 597                 $this->mBodytext = '';
 598                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 599
 600                 # We put a comment in the .html file so a Sysop can diagnose the page the
 601                 # user can't see.
 602                 $this->addHTML( "\n<!--" .
 603                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 604                                                 ':' .
 605                                                 $wgTitle->getDBkey() . '-->' );
 606                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 607         }
 608
 609         function databaseError( $fname, $sql, $error, $errno ) {
 610                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 611
 612                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 613                 $this->setRobotpolicy( 'noindex,nofollow' );
 614                 $this->setArticleRelated( false );
 615                 $this->enableClientCache( false );
 616                 $this->mRedirect = '';
 617
 618                 if( !$wgShowSQLErrors ) {
 619                         $sql = wfMsg( 'sqlhidden' );
 620                 }
 621
 622                 if ( $wgCommandLineMode ) {
 623                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 624                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 625                 } else {
 626                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 627                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 628                 }
 629
 630                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 631                         print $msg."\n";
 632                         wfErrorExit();
 633                 }
 634                 $this->mBodytext = $msg;
 635                 $this->output();
 636                 wfErrorExit();
 637         }
 638
 639         function readOnlyPage( $source = null, $protected = false ) {
 640                 global $wgUser, $wgReadOnlyFile, $wgReadOnly;
 641
 642                 $this->setRobotpolicy( 'noindex,nofollow' );
 643                 $this->setArticleRelated( false );
 644
 645                 if( $protected ) {
 646                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 647                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 648                 } else {
 649                         $this->setPageTitle( wfMsg( 'readonly' ) );
 650                         if ( $wgReadOnly ) {
 651                                 $reason = $wgReadOnly;
 652                         } else {
 653                                 $reason = file_get_contents( $wgReadOnlyFile );
 654                         }
 655                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 656                 }
 657
 658                 if( is_string( $source ) ) {
 659                         if( strcmp( $source, '' ) == 0 ) {
 660                                 $source = wfMsg( 'noarticletext' );
 661                         }
 662                         $rows = $wgUser->getOption( 'rows' );
 663                         $cols = $wgUser->getOption( 'cols' );
 664                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 665                                 htmlspecialchars( $source ) . "\n</textarea>";
 666                         $this->addHTML( $text );
 667                 }
 668
 669                 $this->returnToMain( false );
 670         }
 671
 672         function fatalError( $message ) {
 673                 $this->setPageTitle( wfMsg( "internalerror" ) );
 674                 $this->setRobotpolicy( "noindex,nofollow" );
 675                 $this->setArticleRelated( false );
 676                 $this->enableClientCache( false );
 677                 $this->mRedirect = '';
 678
 679                 $this->mBodytext = $message;
 680                 $this->output();
 681                 wfErrorExit();
 682         }
 683
 684         function unexpectedValueError( $name, $val ) {
 685                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 686         }
 687
 688         function fileCopyError( $old, $new ) {
 689                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 690         }
 691
 692         function fileRenameError( $old, $new ) {
 693                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 694         }
 695
 696         function fileDeleteError( $name ) {
 697                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 698         }
 699
 700         function fileNotFoundError( $name ) {
 701                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 702         }
 703
 704         /**
 705          * return from error messages or notes
 706          * @param $auto automatically redirect the user after 10 seconds
 707          * @param $returnto page title to return to. Default is Main Page.
 708          */
 709         function returnToMain( $auto = true, $returnto = NULL ) {
 710                 global $wgUser, $wgOut, $wgRequest;
 711
 712                 if ( $returnto == NULL ) {
 713                         $returnto = $wgRequest->getText( 'returnto' );
 714                 }
 715                 $returnto = htmlspecialchars( $returnto );
 716
 717                 $sk = $wgUser->getSkin();
 718                 if ( '' == $returnto ) {
 719                         $returnto = wfMsgForContent( 'mainpage' );
 720                 }
 721                 $link = $sk->makeKnownLink( $returnto, '' );
 722
 723                 $r = wfMsg( 'returnto', $link );
 724                 if ( $auto ) {
 725                         $titleObj = Title::newFromText( $returnto );
 726                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 727                 }
 728                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 729         }
 730
 731         /**
 732          * This function takes the existing and broken links for the page
 733          * and uses the first 10 of them for META keywords
 734          */
 735         function addMetaTags () {
 736                 global $wgLinkCache , $wgOut ;
 737                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 738                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 739                 $a = array_merge ( $good , $bad ) ;
 740                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 741                 $a = implode ( ',' , $a ) ;
 742                 $strip = array(
 743                         "/<.*?>/" => '',
 744                         "/_/" => ' '
 745                 );
 746                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 747
 748                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 749         }
 750
 751         /**
 752          * @private
 753          * @return string
 754          */
 755         function headElement() {
 756                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 757                 global $wgUser, $wgContLang, $wgRequest;
 758
 759                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 760                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 761                 } else {
 762                         $ret = '';
 763                 }
 764
 765                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 766
 767                 if ( "" == $this->mHTMLtitle ) {
 768                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 769                 }
 770
 771                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 772                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 773                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 774                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 775
 776                 $ret .= $this->getHeadLinks();
 777                 global $wgStylePath;
 778                 if( $this->isPrintable() ) {
 779                         $media = '';
 780                 } else {
 781                         $media = "media='print'";
 782                 }
 783                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 784                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 785
 786                 $sk = $wgUser->getSkin();
 787                 $ret .= $sk->getHeadScripts();
 788                 $ret .= $this->mScripts;
 789                 $ret .= $sk->getUserStyles();
 790
 791                 $ret .= "</head>\n";
 792                 return $ret;
 793         }
 794
 795         function getHeadLinks() {
 796                 global $wgRequest, $wgStylePath;
 797                 $ret = '';
 798                 foreach ( $this->mMetatags as $tag ) {
 799                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 800                                 $a = 'http-equiv';
 801                                 $tag[0] = substr( $tag[0], 5 );
 802                         } else {
 803                                 $a = 'name';
 804                         }
 805                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 806                 }
 807                 $p = $this->mRobotpolicy;
 808                 if ( '' == $p ) { $p = 'index,follow'; }
 809                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 810
 811                 if ( count( $this->mKeywords ) > 0 ) {
 812                         $strip = array(
 813                                 "/<.*?>/" => '',
 814                                 "/_/" => ' '
 815                         );
 816                         $ret .= "<meta name=\"keywords\" content=\"" .
 817                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 818                 }
 819                 foreach ( $this->mLinktags as $tag ) {
 820                         $ret .= '<link';
 821                         foreach( $tag as $attr => $val ) {
 822                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 823                         }
 824                         $ret .= " />\n";
 825                 }
 826                 if( $this->isSyndicated() ) {
 827                         # FIXME: centralize the mime-type and name information in Feed.php
 828                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 829                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 830                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 831                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 832                 }
 833
 834                 return $ret;
 835         }
 836
 837         /**
 838          * Run any necessary pre-output transformations on the buffer text
 839          */
 840         function transformBuffer( $options = 0 ) {
 841         }
 842
 843
 844         /**
 845          * Turn off regular page output and return an error reponse
 846          * for when rate limiting has triggered.
 847          * @todo: i18n
 848          * @access public
 849          */
 850         function rateLimited() {
 851                 global $wgOut;
 852                 $wgOut->disable();
 853                 wfHttpError( 500, 'Internal Server Error',
 854                         'Sorry, the server has encountered an internal error. ' .
 855                         'Please wait a moment and hit "refresh" to submit the request again.' );
 856         }
 857
 858 }
 859
 860 } // MediaWiki
 861
 862 ?>