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, $mETag, $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         var $mArticleBodyOnly = false;
  36
  37         /**
  38          * Constructor
  39          * Initialise private variables
  40          */
  41         function OutputPage() {
  42                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  43                 $this->mKeywords = $this->mLinktags = array();
  44                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  45                 $this->mRedirect = $this->mLastModified =
  46                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  47                 $this->mOnloadHandler = '';
  48                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  49                 $this->mSuppressQuickbar = $this->mPrintable = false;
  50                 $this->mLanguageLinks = array();
  51                 $this->mCategoryLinks = array() ;
  52                 $this->mDoNothing = false;
  53                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  54                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  55                 $this->mSquidMaxage = 0;
  56                 $this->mScripts = '';
  57                 $this->mETag = false;
  58         }
  59
  60         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
  61         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  62         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  63
  64         # To add an http-equiv meta tag, precede the name with "http:"
  65         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  66         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  67         function addScript( $script ) { $this->mScripts .= $script; }
  68         function getScript() { return $this->mScripts; }
  69
  70         function setETag($tag) { $this->mETag = $tag; }
  71         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
  72
  73         function addLink( $linkarr ) {
  74                 # $linkarr should be an associative array of attributes. We'll escape on output.
  75                 array_push( $this->mLinktags, $linkarr );
  76         }
  77
  78         function addMetadataLink( $linkarr ) {
  79                 # note: buggy CC software only reads first "meta" link
  80                 static $haveMeta = false;
  81                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  82                 $this->addLink( $linkarr );
  83                 $haveMeta = true;
  84         }
  85
  86         /**
  87          * checkLastModified tells the client to use the client-cached page if
  88          * possible. If sucessful, the OutputPage is disabled so that
  89          * any future call to OutputPage->output() have no effect. The method
  90          * returns true iff cache-ok headers was sent.
  91          */
  92         function checkLastModified ( $timestamp ) {
  93                 global $wgLang, $wgCachePages, $wgUser;
  94                 if ( !$timestamp || $timestamp == '19700101000000' ) {
  95                         wfDebug( "CACHE DISABLED, NO TIMESTAMP\n" );
  96                         return;
  97                 }
  98                 if( !$wgCachePages ) {
  99                         wfDebug( "CACHE DISABLED\n", false );
 100                         return;
 101                 }
 102                 if( $wgUser->getOption( 'nocache' ) ) {
 103                         wfDebug( "USER DISABLED CACHE\n", false );
 104                         return;
 105                 }
 106
 107                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 108                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
 109
 110                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 111                         # IE sends sizes after the date like this:
 112                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 113                         # this breaks strtotime().
 114                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 115                         $ismodsince = wfTimestamp( TS_MW, strtotime( $modsince ) );
 116                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 117                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 118                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) ) {
 119                                 # Make sure you're in a place you can leave when you call us!
 120                                 header( "HTTP/1.0 304 Not Modified" );
 121                                 $this->mLastModified = $lastmod;
 122                                 $this->sendCacheControl();
 123                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 124                                 $this->disable();
 125                                 return true;
 126                         } else {
 127                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 128                                 $this->mLastModified = $lastmod;
 129                         }
 130                 } else {
 131                         wfDebug( "client did not send If-Modified-Since header\n", false );
 132                         $this->mLastModified = $lastmod;
 133                 }
 134         }
 135
 136         function getPageTitleActionText () {
 137                 global $action;
 138                 switch($action) {
 139                         case 'edit':
 140                                 return wfMsg('edit');
 141                         case 'history':
 142                                 return wfMsg('history_short');
 143                         case 'protect':
 144                                 return wfMsg('protect');
 145                         case 'unprotect':
 146                                 return wfMsg('unprotect');
 147                         case 'delete':
 148                                 return wfMsg('delete');
 149                         case 'watch':
 150                                 return wfMsg('watch');
 151                         case 'unwatch':
 152                                 return wfMsg('unwatch');
 153                         case 'submit':
 154                                 return wfMsg('preview');
 155                         case 'info':
 156                                 return wfMsg('info_short');
 157                         default:
 158                                 return '';
 159                 }
 160         }
 161
 162         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 163         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 164         function setPageTitle( $name ) {
 165                 global $action, $wgContLang;
 166                 $name = $wgContLang->convert($name, true);
 167                 $this->mPagetitle = $name;
 168                 if(!empty($action)) {
 169                         $taction =  $this->getPageTitleActionText();
 170                         if( !empty( $taction ) ) {
 171                                 $name .= ' - '.$taction;
 172                         }
 173                 }
 174                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 175         }
 176         function getHTMLTitle() { return $this->mHTMLtitle; }
 177         function getPageTitle() { return $this->mPagetitle; }
 178         function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 179         function getSubtitle() { return $this->mSubtitle; }
 180         function isArticle() { return $this->mIsarticle; }
 181         function setPrintable() { $this->mPrintable = true; }
 182         function isPrintable() { return $this->mPrintable; }
 183         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 184         function isSyndicated() { return $this->mShowFeedLinks; }
 185         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 186         function getOnloadHandler() { return $this->mOnloadHandler; }
 187         function disable() { $this->mDoNothing = true; }
 188
 189         function setArticleRelated( $v ) {
 190                 $this->mIsArticleRelated = $v;
 191                 if ( !$v ) {
 192                         $this->mIsarticle = false;
 193                 }
 194         }
 195         function setArticleFlag( $v ) {
 196                 $this->mIsarticle = $v;
 197                 if ( $v ) {
 198                         $this->mIsArticleRelated = $v;
 199                 }
 200         }
 201
 202         function isArticleRelated() { return $this->mIsArticleRelated; }
 203
 204         function getLanguageLinks() { return $this->mLanguageLinks; }
 205         function addLanguageLinks($newLinkArray) {
 206                 $this->mLanguageLinks += $newLinkArray;
 207         }
 208         function setLanguageLinks($newLinkArray) {
 209                 $this->mLanguageLinks = $newLinkArray;
 210         }
 211
 212         function getCategoryLinks() {
 213                 return $this->mCategoryLinks;
 214         }
 215         function addCategoryLinks($newLinkArray) {
 216                 $this->mCategoryLinks += $newLinkArray;
 217         }
 218         function setCategoryLinks($newLinkArray) {
 219                 $this->mCategoryLinks += $newLinkArray;
 220         }
 221
 222         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 223         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 224
 225         function addHTML( $text ) { $this->mBodytext .= $text; }
 226         function clearHTML() { $this->mBodytext = ''; }
 227         function getHTML() { return $this->mBodytext; }
 228         function debug( $text ) { $this->mDebugtext .= $text; }
 229
 230         function setParserOptions( $options ) {
 231                 return wfSetVar( $this->mParserOptions, $options );
 232         }
 233
 234         /**
 235          * Convert wikitext to HTML and add it to the buffer
 236          * Default assumes that the current page title will
 237          * be used.
 238          */
 239         function addWikiText( $text, $linestart = true ) {
 240                 global $wgTitle;
 241                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 242         }
 243
 244         function addWikiTextWithTitle($text, &$title, $linestart = true) {
 245                 $this->addWikiTextTitle($text, $title, $linestart);
 246         }
 247
 248         function addWikiTextTitle($text, &$title, $linestart) {
 249                 global $wgParser, $wgUseTidy;
 250                 $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions, $linestart );
 251                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 252                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 253                 if ( $parserOutput->getCacheTime() == -1 ) {
 254                         $this->enableClientCache( false );
 255                 }
 256                 $this->addHTML( $parserOutput->getText() );
 257         }
 258
 259         /**
 260          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 261          * Saves the text into the parser cache if possible
 262          */
 263         function addPrimaryWikiText( $text, $cacheArticle ) {
 264                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 265
 266                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 267
 268                 $text = $parserOutput->getText();
 269
 270                 if ( $cacheArticle && $parserOutput->getCacheTime() != -1 ) {
 271                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 272                 }
 273
 274                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 275                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 276                 if ( $parserOutput->getCacheTime() == -1 ) {
 277                         $this->enableClientCache( false );
 278                 }
 279                 $this->addHTML( $text );
 280         }
 281
 282         /**
 283          * Add the output of a QuickTemplate to the output buffer
 284          * @param QuickTemplate $template
 285          */
 286         function addTemplate( &$template ) {
 287                 ob_start();
 288                 $template->execute();
 289                 $this->addHtml( ob_get_contents() );
 290                 ob_end_clean();
 291         }
 292
 293         /**
 294          * Parse wikitext and return the HTML. This is for special pages that add the text later
 295          */
 296         function parse( $text, $linestart = true ) {
 297                 global $wgParser, $wgTitle;
 298                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 299                 return $parserOutput->getText();
 300         }
 301
 302         /**
 303          * @param $article
 304          * @param $user
 305          *
 306          * @return bool
 307          */
 308         function tryParserCache( $article, $user ) {
 309                 global $wgParserCache;
 310                 $parserOutput = $wgParserCache->get( $article, $user );
 311                 if ( $parserOutput !== false ) {
 312                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 313                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 314                         $this->addHTML( $parserOutput->getText() );
 315                         $t = $parserOutput->getTitleText();
 316                         if( !empty( $t ) ) {
 317                                 $this->setPageTitle( $t );
 318                         }
 319                         return true;
 320                 } else {
 321                         return false;
 322                 }
 323         }
 324
 325         /**
 326          * Set the maximum cache time on the Squid in seconds
 327          * @param $maxage
 328          */
 329         function setSquidMaxage( $maxage ) {
 330                 $this->mSquidMaxage = $maxage;
 331         }
 332
 333         /**
 334          * Use enableClientCache(false) to force it to send nocache headers
 335          * @param $state
 336          */
 337         function enableClientCache( $state ) {
 338                 return wfSetVar( $this->mEnableClientCache, $state );
 339         }
 340
 341         function sendCacheControl() {
 342                 global $wgUseSquid, $wgUseESI;
 343
 344                 if ($this->mETag)
 345                         header("ETag: $this->mETag");
 346
 347                 # don't serve compressed data to clients who can't handle it
 348                 # maintain different caches for logged-in users and non-logged in ones
 349                 header( 'Vary: Accept-Encoding, Cookie' );
 350                 if( $this->mEnableClientCache ) {
 351                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 352                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 353                         {
 354                                 if ( $wgUseESI ) {
 355                                         # We'll purge the proxy cache explicitly, but require end user agents
 356                                         # to revalidate against the proxy on each visit.
 357                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 358                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 359                                         # start with a shorter timeout for initial testing
 360                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 361                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 362                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 363                                 } else {
 364                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 365                                         # to revalidate against the proxy on each visit.
 366                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 367                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 368                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 369                                         # start with a shorter timeout for initial testing
 370                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 371                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 372                                 }
 373                         } else {
 374                                 # We do want clients to cache if they can, but they *must* check for updates
 375                                 # on revisiting the page.
 376                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 377                                 header( "Expires: -1" );
 378                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 379                         }
 380                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 381                 } else {
 382                         wfDebug( "** no caching **\n", false );
 383
 384                         # In general, the absence of a last modified header should be enough to prevent
 385                         # the client from using its cache. We send a few other things just to make sure.
 386                         header( 'Expires: -1' );
 387                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 388                         header( 'Pragma: no-cache' );
 389                 }
 390         }
 391
 392         /**
 393          * Finally, all the text has been munged and accumulated into
 394          * the object, let's actually output it:
 395          */
 396         function output() {
 397                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 398                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 399                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 400
 401                 if( $this->mDoNothing ){
 402                         return;
 403                 }
 404                 $fname = 'OutputPage::output';
 405                 wfProfileIn( $fname );
 406                 $sk = $wgUser->getSkin();
 407
 408                 if ( '' != $this->mRedirect ) {
 409                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 410                                 # Standards require redirect URLs to be absolute
 411                                 global $wgServer;
 412                                 $this->mRedirect = $wgServer . $this->mRedirect;
 413                         }
 414                         if( $this->mRedirectCode == '301') {
 415                                 if( !$wgDebugRedirects ) {
 416                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 417                                 }
 418                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 419                         }
 420
 421                         $this->sendCacheControl();
 422
 423                         if( $wgDebugRedirects ) {
 424                                 $url = htmlspecialchars( $this->mRedirect );
 425                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 426                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 427                                 print "</body>\n</html>\n";
 428                         } else {
 429                                 header( 'Location: '.$this->mRedirect );
 430                         }
 431                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 432                         return;
 433                 }
 434
 435
 436                 # Buffer output; final headers may depend on later processing
 437                 ob_start();
 438
 439                 $this->transformBuffer();
 440
 441                 # Disable temporary placeholders, so that the skin produces HTML
 442                 $sk->postParseLinkColour( false );
 443
 444                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 445                 header( 'Content-language: '.$wgContLanguageCode );
 446
 447                 $exp = time() + $wgCookieExpiration;
 448                 foreach( $this->mCookies as $name => $val ) {
 449                         setcookie( $name, $val, $exp, '/' );
 450                 }
 451
 452                 if ($this->mArticleBodyOnly) {
 453                         $this->out($this->mBodytext);
 454                 } else {
 455                         wfProfileIn( 'Output-skin' );
 456                         $sk->outputPage( $this );
 457                         wfProfileOut( 'Output-skin' );
 458                 }
 459
 460                 $this->sendCacheControl();
 461                 ob_end_flush();
 462         }
 463
 464         function out( $ins ) {
 465                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 466                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 467                         $outs = $ins;
 468                 } else {
 469                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 470                         if ( false === $outs ) { $outs = $ins; }
 471                 }
 472                 print $outs;
 473         }
 474
 475         function setEncodings() {
 476                 global $wgInputEncoding, $wgOutputEncoding;
 477                 global $wgUser, $wgContLang;
 478
 479                 $wgInputEncoding = strtolower( $wgInputEncoding );
 480
 481                 if( $wgUser->getOption( 'altencoding' ) ) {
 482                         $wgContLang->setAltEncoding();
 483                         return;
 484                 }
 485
 486                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 487                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 488                         return;
 489                 }
 490                 $wgOutputEncoding = $wgInputEncoding;
 491         }
 492
 493         /**
 494          * Returns a HTML comment with the elapsed time since request.
 495          * This method has no side effects.
 496          * @return string
 497          */
 498         function reportTime() {
 499                 global $wgRequestTime;
 500
 501                 $now = wfTime();
 502                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 503                 $start = (float)$sec + (float)$usec;
 504                 $elapsed = $now - $start;
 505
 506                 # Use real server name if available, so we know which machine
 507                 # in a server farm generated the current page.
 508                 if ( function_exists( 'posix_uname' ) ) {
 509                         $uname = @posix_uname();
 510                 } else {
 511                         $uname = false;
 512                 }
 513                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 514                         $hostname = $uname['nodename'];
 515                 } else {
 516                         # This may be a virtual server.
 517                         $hostname = $_SERVER['SERVER_NAME'];
 518                 }
 519                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 520                   $hostname, $elapsed );
 521                 return $com;
 522         }
 523
 524         /**
 525          * Note: these arguments are keys into wfMsg(), not text!
 526          */
 527         function errorpage( $title, $msg ) {
 528                 global $wgTitle;
 529
 530                 $this->mDebugtext .= 'Original title: ' .
 531                   $wgTitle->getPrefixedText() . "\n";
 532                 $this->setPageTitle( wfMsg( $title ) );
 533                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 534                 $this->setRobotpolicy( 'noindex,nofollow' );
 535                 $this->setArticleRelated( false );
 536                 $this->enableClientCache( false );
 537                 $this->mRedirect = '';
 538
 539                 $this->mBodytext = '';
 540                 $this->addWikiText( wfMsg( $msg ) );
 541                 $this->returnToMain( false );
 542
 543                 $this->output();
 544                 wfErrorExit();
 545         }
 546
 547         /**
 548          * Display an error page indicating that a given version of MediaWiki is
 549          * required to use it
 550          *
 551          * @param mixed $version The version of MediaWiki needed to use the page
 552          */
 553         function versionRequired( $version ) {
 554                 global $wgUser;
 555
 556                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 557                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 558                 $this->setRobotpolicy( 'noindex,nofollow' );
 559                 $this->setArticleRelated( false );
 560                 $this->mBodytext = '';
 561
 562                 $sk = $wgUser->getSkin();
 563                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 564                 $this->returnToMain();
 565         }
 566
 567         /**
 568          * Display an error page noting that a given permission bit is required.
 569          * This should generally replace the sysopRequired, developerRequired etc.
 570          * @param string $permission key required
 571          */
 572         function permissionRequired( $permission ) {
 573                 global $wgUser;
 574
 575                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 576                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 577                 $this->setRobotpolicy( 'noindex,nofollow' );
 578                 $this->setArticleRelated( false );
 579                 $this->mBodytext = '';
 580
 581                 $sk = $wgUser->getSkin();
 582                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ) );
 583                 $this->addHTML( wfMsgHtml( 'badaccesstext', $ap, $permission ) );
 584                 $this->returnToMain();
 585         }
 586
 587         /**
 588          * @deprecated
 589          */
 590         function sysopRequired() {
 591                 global $wgUser;
 592
 593                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 594                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 595                 $this->setRobotpolicy( 'noindex,nofollow' );
 596                 $this->setArticleRelated( false );
 597                 $this->mBodytext = '';
 598
 599                 $sk = $wgUser->getSkin();
 600                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 601                 $this->addHTML( wfMsgHtml( 'sysoptext', $ap ) );
 602                 $this->returnToMain();
 603         }
 604
 605         /**
 606          * @deprecated
 607          */
 608         function developerRequired() {
 609                 global $wgUser;
 610
 611                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 612                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 613                 $this->setRobotpolicy( 'noindex,nofollow' );
 614                 $this->setArticleRelated( false );
 615                 $this->mBodytext = '';
 616
 617                 $sk = $wgUser->getSkin();
 618                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 619                 $this->addHTML( wfMsgHtml( 'developertext', $ap ) );
 620                 $this->returnToMain();
 621         }
 622
 623         function loginToUse() {
 624                 global $wgUser, $wgTitle, $wgContLang;
 625
 626                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 627                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 628                 $this->setRobotpolicy( 'noindex,nofollow' );
 629                 $this->setArticleFlag( false );
 630                 $this->mBodytext = '';
 631                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 632
 633                 # We put a comment in the .html file so a Sysop can diagnose the page the
 634                 # user can't see.
 635                 $this->addHTML( "\n<!--" .
 636                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 637                                                 ':' .
 638                                                 $wgTitle->getDBkey() . '-->' );
 639                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 640         }
 641
 642         function databaseError( $fname, $sql, $error, $errno ) {
 643                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 644
 645                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 646                 $this->setRobotpolicy( 'noindex,nofollow' );
 647                 $this->setArticleRelated( false );
 648                 $this->enableClientCache( false );
 649                 $this->mRedirect = '';
 650
 651                 if( !$wgShowSQLErrors ) {
 652                         $sql = wfMsg( 'sqlhidden' );
 653                 }
 654
 655                 if ( $wgCommandLineMode ) {
 656                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 657                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 658                 } else {
 659                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 660                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 661                 }
 662
 663                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 664                         print $msg."\n";
 665                         wfErrorExit();
 666                 }
 667                 $this->mBodytext = $msg;
 668                 $this->output();
 669                 wfErrorExit();
 670         }
 671
 672         function readOnlyPage( $source = null, $protected = false ) {
 673                 global $wgUser, $wgReadOnlyFile, $wgReadOnly;
 674
 675                 $this->setRobotpolicy( 'noindex,nofollow' );
 676                 $this->setArticleRelated( false );
 677
 678                 if( $protected ) {
 679                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 680                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 681                 } else {
 682                         $this->setPageTitle( wfMsg( 'readonly' ) );
 683                         if ( $wgReadOnly ) {
 684                                 $reason = $wgReadOnly;
 685                         } else {
 686                                 $reason = file_get_contents( $wgReadOnlyFile );
 687                         }
 688                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 689                 }
 690
 691                 if( is_string( $source ) ) {
 692                         if( strcmp( $source, '' ) == 0 ) {
 693                                 $source = wfMsg( 'noarticletext' );
 694                         }
 695                         $rows = $wgUser->getOption( 'rows' );
 696                         $cols = $wgUser->getOption( 'cols' );
 697                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 698                                 htmlspecialchars( $source ) . "\n</textarea>";
 699                         $this->addHTML( $text );
 700                 }
 701
 702                 $this->returnToMain( false );
 703         }
 704
 705         function fatalError( $message ) {
 706                 $this->setPageTitle( wfMsg( "internalerror" ) );
 707                 $this->setRobotpolicy( "noindex,nofollow" );
 708                 $this->setArticleRelated( false );
 709                 $this->enableClientCache( false );
 710                 $this->mRedirect = '';
 711
 712                 $this->mBodytext = $message;
 713                 $this->output();
 714                 wfErrorExit();
 715         }
 716
 717         function unexpectedValueError( $name, $val ) {
 718                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 719         }
 720
 721         function fileCopyError( $old, $new ) {
 722                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 723         }
 724
 725         function fileRenameError( $old, $new ) {
 726                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 727         }
 728
 729         function fileDeleteError( $name ) {
 730                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 731         }
 732
 733         function fileNotFoundError( $name ) {
 734                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 735         }
 736
 737         /**
 738          * return from error messages or notes
 739          * @param $auto automatically redirect the user after 10 seconds
 740          * @param $returnto page title to return to. Default is Main Page.
 741          */
 742         function returnToMain( $auto = true, $returnto = NULL ) {
 743                 global $wgUser, $wgOut, $wgRequest;
 744
 745                 if ( $returnto == NULL ) {
 746                         $returnto = $wgRequest->getText( 'returnto' );
 747                 }
 748                 $returnto = htmlspecialchars( $returnto );
 749
 750                 $sk = $wgUser->getSkin();
 751                 if ( '' == $returnto ) {
 752                         $returnto = wfMsgForContent( 'mainpage' );
 753                 }
 754                 $link = $sk->makeKnownLink( $returnto, '' );
 755
 756                 $r = wfMsg( 'returnto', $link );
 757                 if ( $auto ) {
 758                         $titleObj = Title::newFromText( $returnto );
 759                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 760                 }
 761                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 762         }
 763
 764         /**
 765          * This function takes the existing and broken links for the page
 766          * and uses the first 10 of them for META keywords
 767          */
 768         function addMetaTags () {
 769                 global $wgLinkCache , $wgOut ;
 770                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 771                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 772                 $a = array_merge ( $good , $bad ) ;
 773                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 774                 $a = implode ( ',' , $a ) ;
 775                 $strip = array(
 776                         "/<.*?>/" => '',
 777                         "/_/" => ' '
 778                 );
 779                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 780
 781                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 782         }
 783
 784         /**
 785          * @private
 786          * @return string
 787          */
 788         function headElement() {
 789                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 790                 global $wgUser, $wgContLang, $wgRequest;
 791
 792                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 793                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 794                 } else {
 795                         $ret = '';
 796                 }
 797
 798                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 799
 800                 if ( "" == $this->mHTMLtitle ) {
 801                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 802                 }
 803
 804                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 805                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 806                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 807                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 808
 809                 $ret .= $this->getHeadLinks();
 810                 global $wgStylePath;
 811                 if( $this->isPrintable() ) {
 812                         $media = '';
 813                 } else {
 814                         $media = "media='print'";
 815                 }
 816                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 817                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 818
 819                 $sk = $wgUser->getSkin();
 820                 $ret .= $sk->getHeadScripts();
 821                 $ret .= $this->mScripts;
 822                 $ret .= $sk->getUserStyles();
 823
 824                 $ret .= "</head>\n";
 825                 return $ret;
 826         }
 827
 828         function getHeadLinks() {
 829                 global $wgRequest, $wgStylePath;
 830                 $ret = '';
 831                 foreach ( $this->mMetatags as $tag ) {
 832                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 833                                 $a = 'http-equiv';
 834                                 $tag[0] = substr( $tag[0], 5 );
 835                         } else {
 836                                 $a = 'name';
 837                         }
 838                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 839                 }
 840                 $p = $this->mRobotpolicy;
 841                 if ( '' == $p ) { $p = 'index,follow'; }
 842                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 843
 844                 if ( count( $this->mKeywords ) > 0 ) {
 845                         $strip = array(
 846                                 "/<.*?>/" => '',
 847                                 "/_/" => ' '
 848                         );
 849                         $ret .= "<meta name=\"keywords\" content=\"" .
 850                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 851                 }
 852                 foreach ( $this->mLinktags as $tag ) {
 853                         $ret .= '<link';
 854                         foreach( $tag as $attr => $val ) {
 855                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 856                         }
 857                         $ret .= " />\n";
 858                 }
 859                 if( $this->isSyndicated() ) {
 860                         # FIXME: centralize the mime-type and name information in Feed.php
 861                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 862                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 863                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 864                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 865                 }
 866
 867                 return $ret;
 868         }
 869
 870         /**
 871          * Run any necessary pre-output transformations on the buffer text
 872          */
 873         function transformBuffer( $options = 0 ) {
 874         }
 875
 876
 877         /**
 878          * Turn off regular page output and return an error reponse
 879          * for when rate limiting has triggered.
 880          * @todo: i18n
 881          * @access public
 882          */
 883         function rateLimited() {
 884                 global $wgOut;
 885                 $wgOut->disable();
 886                 wfHttpError( 500, 'Internal Server Error',
 887                         'Sorry, the server has encountered an internal error. ' .
 888                         'Please wait a moment and hit "refresh" to submit the request again.' );
 889         }
 890
 891 }
 892
 893 } // MediaWiki
 894
 895 ?>