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 = $only; }
  72         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
  73
  74         function addLink( $linkarr ) {
  75                 # $linkarr should be an associative array of attributes. We'll escape on output.
  76                 array_push( $this->mLinktags, $linkarr );
  77         }
  78
  79         function addMetadataLink( $linkarr ) {
  80                 # note: buggy CC software only reads first "meta" link
  81                 static $haveMeta = false;
  82                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  83                 $this->addLink( $linkarr );
  84                 $haveMeta = true;
  85         }
  86
  87         /**
  88          * checkLastModified tells the client to use the client-cached page if
  89          * possible. If sucessful, the OutputPage is disabled so that
  90          * any future call to OutputPage->output() have no effect. The method
  91          * returns true iff cache-ok headers was sent.
  92          */
  93         function checkLastModified ( $timestamp ) {
  94                 global $wgLang, $wgCachePages, $wgUser;
  95                 if ( !$timestamp || $timestamp == '19700101000000' ) {
  96                         wfDebug( "CACHE DISABLED, NO TIMESTAMP\n" );
  97                         return;
  98                 }
  99                 if( !$wgCachePages ) {
 100                         wfDebug( "CACHE DISABLED\n", false );
 101                         return;
 102                 }
 103                 if( $wgUser->getOption( 'nocache' ) ) {
 104                         wfDebug( "USER DISABLED CACHE\n", false );
 105                         return;
 106                 }
 107
 108                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 109                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
 110
 111                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 112                         # IE sends sizes after the date like this:
 113                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 114                         # this breaks strtotime().
 115                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 116                         $ismodsince = wfTimestamp( TS_MW, strtotime( $modsince ) );
 117                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 118                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 119                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) ) {
 120                                 # Make sure you're in a place you can leave when you call us!
 121                                 header( "HTTP/1.0 304 Not Modified" );
 122                                 $this->mLastModified = $lastmod;
 123                                 $this->sendCacheControl();
 124                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 125                                 $this->disable();
 126                                 return true;
 127                         } else {
 128                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 129                                 $this->mLastModified = $lastmod;
 130                         }
 131                 } else {
 132                         wfDebug( "client did not send If-Modified-Since header\n", false );
 133                         $this->mLastModified = $lastmod;
 134                 }
 135         }
 136
 137         function getPageTitleActionText () {
 138                 global $action;
 139                 switch($action) {
 140                         case 'edit':
 141                                 return wfMsg('edit');
 142                         case 'history':
 143                                 return wfMsg('history_short');
 144                         case 'protect':
 145                                 return wfMsg('protect');
 146                         case 'unprotect':
 147                                 return wfMsg('unprotect');
 148                         case 'delete':
 149                                 return wfMsg('delete');
 150                         case 'watch':
 151                                 return wfMsg('watch');
 152                         case 'unwatch':
 153                                 return wfMsg('unwatch');
 154                         case 'submit':
 155                                 return wfMsg('preview');
 156                         case 'info':
 157                                 return wfMsg('info_short');
 158                         default:
 159                                 return '';
 160                 }
 161         }
 162
 163         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 164         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 165         function setPageTitle( $name ) {
 166                 global $action, $wgContLang;
 167                 $name = $wgContLang->convert($name, true);
 168                 $this->mPagetitle = $name;
 169                 if(!empty($action)) {
 170                         $taction =  $this->getPageTitleActionText();
 171                         if( !empty( $taction ) ) {
 172                                 $name .= ' - '.$taction;
 173                         }
 174                 }
 175                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 176         }
 177         function getHTMLTitle() { return $this->mHTMLtitle; }
 178         function getPageTitle() { return $this->mPagetitle; }
 179         function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 180         function getSubtitle() { return $this->mSubtitle; }
 181         function isArticle() { return $this->mIsarticle; }
 182         function setPrintable() { $this->mPrintable = true; }
 183         function isPrintable() { return $this->mPrintable; }
 184         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 185         function isSyndicated() { return $this->mShowFeedLinks; }
 186         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 187         function getOnloadHandler() { return $this->mOnloadHandler; }
 188         function disable() { $this->mDoNothing = true; }
 189
 190         function setArticleRelated( $v ) {
 191                 $this->mIsArticleRelated = $v;
 192                 if ( !$v ) {
 193                         $this->mIsarticle = false;
 194                 }
 195         }
 196         function setArticleFlag( $v ) {
 197                 $this->mIsarticle = $v;
 198                 if ( $v ) {
 199                         $this->mIsArticleRelated = $v;
 200                 }
 201         }
 202
 203         function isArticleRelated() { return $this->mIsArticleRelated; }
 204
 205         function getLanguageLinks() { return $this->mLanguageLinks; }
 206         function addLanguageLinks($newLinkArray) {
 207                 $this->mLanguageLinks += $newLinkArray;
 208         }
 209         function setLanguageLinks($newLinkArray) {
 210                 $this->mLanguageLinks = $newLinkArray;
 211         }
 212
 213         function getCategoryLinks() {
 214                 return $this->mCategoryLinks;
 215         }
 216         function addCategoryLinks($newLinkArray) {
 217                 $this->mCategoryLinks += $newLinkArray;
 218         }
 219         function setCategoryLinks($newLinkArray) {
 220                 $this->mCategoryLinks += $newLinkArray;
 221         }
 222
 223         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 224         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 225
 226         function addHTML( $text ) { $this->mBodytext .= $text; }
 227         function clearHTML() { $this->mBodytext = ''; }
 228         function getHTML() { return $this->mBodytext; }
 229         function debug( $text ) { $this->mDebugtext .= $text; }
 230
 231         function setParserOptions( $options ) {
 232                 return wfSetVar( $this->mParserOptions, $options );
 233         }
 234
 235         /**
 236          * Convert wikitext to HTML and add it to the buffer
 237          * Default assumes that the current page title will
 238          * be used.
 239          */
 240         function addWikiText( $text, $linestart = true ) {
 241                 global $wgTitle;
 242                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 243         }
 244
 245         function addWikiTextWithTitle($text, &$title, $linestart = true) {
 246                 $this->addWikiTextTitle($text, $title, $linestart);
 247         }
 248
 249         function addWikiTextTitle($text, &$title, $linestart) {
 250                 global $wgParser, $wgUseTidy;
 251                 $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions, $linestart );
 252                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 253                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 254                 if ( $parserOutput->getCacheTime() == -1 ) {
 255                         $this->enableClientCache( false );
 256                 }
 257                 $this->addHTML( $parserOutput->getText() );
 258         }
 259
 260         /**
 261          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 262          * Saves the text into the parser cache if possible
 263          */
 264         function addPrimaryWikiText( $text, $cacheArticle ) {
 265                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 266
 267                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 268
 269                 $text = $parserOutput->getText();
 270
 271                 if ( $cacheArticle && $parserOutput->getCacheTime() != -1 ) {
 272                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 273                 }
 274
 275                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 276                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 277                 if ( $parserOutput->getCacheTime() == -1 ) {
 278                         $this->enableClientCache( false );
 279                 }
 280                 $this->addHTML( $text );
 281         }
 282
 283         /**
 284          * Add the output of a QuickTemplate to the output buffer
 285          * @param QuickTemplate $template
 286          */
 287         function addTemplate( &$template ) {
 288                 ob_start();
 289                 $template->execute();
 290                 $this->addHtml( ob_get_contents() );
 291                 ob_end_clean();
 292         }
 293
 294         /**
 295          * Parse wikitext and return the HTML. This is for special pages that add the text later
 296          */
 297         function parse( $text, $linestart = true ) {
 298                 global $wgParser, $wgTitle;
 299                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 300                 return $parserOutput->getText();
 301         }
 302
 303         /**
 304          * @param $article
 305          * @param $user
 306          *
 307          * @return bool
 308          */
 309         function tryParserCache( $article, $user ) {
 310                 global $wgParserCache;
 311                 $parserOutput = $wgParserCache->get( $article, $user );
 312                 if ( $parserOutput !== false ) {
 313                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 314                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 315                         $this->addHTML( $parserOutput->getText() );
 316                         $t = $parserOutput->getTitleText();
 317                         if( !empty( $t ) ) {
 318                                 $this->setPageTitle( $t );
 319                         }
 320                         return true;
 321                 } else {
 322                         return false;
 323                 }
 324         }
 325
 326         /**
 327          * Set the maximum cache time on the Squid in seconds
 328          * @param $maxage
 329          */
 330         function setSquidMaxage( $maxage ) {
 331                 $this->mSquidMaxage = $maxage;
 332         }
 333
 334         /**
 335          * Use enableClientCache(false) to force it to send nocache headers
 336          * @param $state
 337          */
 338         function enableClientCache( $state ) {
 339                 return wfSetVar( $this->mEnableClientCache, $state );
 340         }
 341
 342         function sendCacheControl() {
 343                 global $wgUseSquid, $wgUseESI;
 344
 345                 if ($this->mETag)
 346                         header("ETag: $this->mETag");
 347
 348                 # don't serve compressed data to clients who can't handle it
 349                 # maintain different caches for logged-in users and non-logged in ones
 350                 header( 'Vary: Accept-Encoding, Cookie' );
 351                 if( $this->mEnableClientCache ) {
 352                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 353                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 354                         {
 355                                 if ( $wgUseESI ) {
 356                                         # We'll purge the proxy cache explicitly, but require end user agents
 357                                         # to revalidate against the proxy on each visit.
 358                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 359                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 360                                         # start with a shorter timeout for initial testing
 361                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 362                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 363                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 364                                 } else {
 365                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 366                                         # to revalidate against the proxy on each visit.
 367                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 368                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 369                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 370                                         # start with a shorter timeout for initial testing
 371                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 372                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 373                                 }
 374                         } else {
 375                                 # We do want clients to cache if they can, but they *must* check for updates
 376                                 # on revisiting the page.
 377                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 378                                 header( "Expires: -1" );
 379                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 380                         }
 381                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 382                 } else {
 383                         wfDebug( "** no caching **\n", false );
 384
 385                         # In general, the absence of a last modified header should be enough to prevent
 386                         # the client from using its cache. We send a few other things just to make sure.
 387                         header( 'Expires: -1' );
 388                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 389                         header( 'Pragma: no-cache' );
 390                 }
 391         }
 392
 393         /**
 394          * Finally, all the text has been munged and accumulated into
 395          * the object, let's actually output it:
 396          */
 397         function output() {
 398                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 399                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 400                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 401
 402                 if( $this->mDoNothing ){
 403                         return;
 404                 }
 405                 $fname = 'OutputPage::output';
 406                 wfProfileIn( $fname );
 407                 $sk = $wgUser->getSkin();
 408
 409                 if ( '' != $this->mRedirect ) {
 410                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 411                                 # Standards require redirect URLs to be absolute
 412                                 global $wgServer;
 413                                 $this->mRedirect = $wgServer . $this->mRedirect;
 414                         }
 415                         if( $this->mRedirectCode == '301') {
 416                                 if( !$wgDebugRedirects ) {
 417                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 418                                 }
 419                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 420                         }
 421
 422                         $this->sendCacheControl();
 423
 424                         if( $wgDebugRedirects ) {
 425                                 $url = htmlspecialchars( $this->mRedirect );
 426                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 427                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 428                                 print "</body>\n</html>\n";
 429                         } else {
 430                                 header( 'Location: '.$this->mRedirect );
 431                         }
 432                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 433                         return;
 434                 }
 435
 436
 437                 # Buffer output; final headers may depend on later processing
 438                 ob_start();
 439
 440                 $this->transformBuffer();
 441
 442                 # Disable temporary placeholders, so that the skin produces HTML
 443                 $sk->postParseLinkColour( false );
 444
 445                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 446                 header( 'Content-language: '.$wgContLanguageCode );
 447
 448                 $exp = time() + $wgCookieExpiration;
 449                 foreach( $this->mCookies as $name => $val ) {
 450                         setcookie( $name, $val, $exp, '/' );
 451                 }
 452
 453                 if ($this->mArticleBodyOnly) {
 454                         $this->out($this->mBodytext);
 455                 } else {
 456                         wfProfileIn( 'Output-skin' );
 457                         $sk->outputPage( $this );
 458                         wfProfileOut( 'Output-skin' );
 459                 }
 460
 461                 $this->sendCacheControl();
 462                 ob_end_flush();
 463         }
 464
 465         function out( $ins ) {
 466                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 467                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 468                         $outs = $ins;
 469                 } else {
 470                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 471                         if ( false === $outs ) { $outs = $ins; }
 472                 }
 473                 print $outs;
 474         }
 475
 476         function setEncodings() {
 477                 global $wgInputEncoding, $wgOutputEncoding;
 478                 global $wgUser, $wgContLang;
 479
 480                 $wgInputEncoding = strtolower( $wgInputEncoding );
 481
 482                 if( $wgUser->getOption( 'altencoding' ) ) {
 483                         $wgContLang->setAltEncoding();
 484                         return;
 485                 }
 486
 487                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 488                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 489                         return;
 490                 }
 491                 $wgOutputEncoding = $wgInputEncoding;
 492         }
 493
 494         /**
 495          * Returns a HTML comment with the elapsed time since request.
 496          * This method has no side effects.
 497          * @return string
 498          */
 499         function reportTime() {
 500                 global $wgRequestTime;
 501
 502                 $now = wfTime();
 503                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 504                 $start = (float)$sec + (float)$usec;
 505                 $elapsed = $now - $start;
 506
 507                 # Use real server name if available, so we know which machine
 508                 # in a server farm generated the current page.
 509                 if ( function_exists( 'posix_uname' ) ) {
 510                         $uname = @posix_uname();
 511                 } else {
 512                         $uname = false;
 513                 }
 514                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 515                         $hostname = $uname['nodename'];
 516                 } else {
 517                         # This may be a virtual server.
 518                         $hostname = $_SERVER['SERVER_NAME'];
 519                 }
 520                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 521                   $hostname, $elapsed );
 522                 return $com;
 523         }
 524
 525         /**
 526          * Note: these arguments are keys into wfMsg(), not text!
 527          */
 528         function errorpage( $title, $msg ) {
 529                 global $wgTitle;
 530
 531                 $this->mDebugtext .= 'Original title: ' .
 532                   $wgTitle->getPrefixedText() . "\n";
 533                 $this->setPageTitle( wfMsg( $title ) );
 534                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 535                 $this->setRobotpolicy( 'noindex,nofollow' );
 536                 $this->setArticleRelated( false );
 537                 $this->enableClientCache( false );
 538                 $this->mRedirect = '';
 539
 540                 $this->mBodytext = '';
 541                 $this->addWikiText( wfMsg( $msg ) );
 542                 $this->returnToMain( false );
 543
 544                 $this->output();
 545                 wfErrorExit();
 546         }
 547
 548         /**
 549          * Display an error page indicating that a given version of MediaWiki is
 550          * required to use it
 551          *
 552          * @param mixed $version The version of MediaWiki needed to use the page
 553          */
 554         function versionRequired( $version ) {
 555                 global $wgUser;
 556
 557                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 558                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 559                 $this->setRobotpolicy( 'noindex,nofollow' );
 560                 $this->setArticleRelated( false );
 561                 $this->mBodytext = '';
 562
 563                 $sk = $wgUser->getSkin();
 564                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 565                 $this->returnToMain();
 566         }
 567
 568         /**
 569          * Display an error page noting that a given permission bit is required.
 570          * This should generally replace the sysopRequired, developerRequired etc.
 571          * @param string $permission key required
 572          */
 573         function permissionRequired( $permission ) {
 574                 global $wgUser;
 575
 576                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 577                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 578                 $this->setRobotpolicy( 'noindex,nofollow' );
 579                 $this->setArticleRelated( false );
 580                 $this->mBodytext = '';
 581
 582                 $sk = $wgUser->getSkin();
 583                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ) );
 584                 $this->addHTML( wfMsgHtml( 'badaccesstext', $ap, $permission ) );
 585                 $this->returnToMain();
 586         }
 587
 588         /**
 589          * @deprecated
 590          */
 591         function sysopRequired() {
 592                 global $wgUser;
 593
 594                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 595                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 596                 $this->setRobotpolicy( 'noindex,nofollow' );
 597                 $this->setArticleRelated( false );
 598                 $this->mBodytext = '';
 599
 600                 $sk = $wgUser->getSkin();
 601                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 602                 $this->addHTML( wfMsgHtml( 'sysoptext', $ap ) );
 603                 $this->returnToMain();
 604         }
 605
 606         /**
 607          * @deprecated
 608          */
 609         function developerRequired() {
 610                 global $wgUser;
 611
 612                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 613                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 614                 $this->setRobotpolicy( 'noindex,nofollow' );
 615                 $this->setArticleRelated( false );
 616                 $this->mBodytext = '';
 617
 618                 $sk = $wgUser->getSkin();
 619                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 620                 $this->addHTML( wfMsgHtml( 'developertext', $ap ) );
 621                 $this->returnToMain();
 622         }
 623
 624         function loginToUse() {
 625                 global $wgUser, $wgTitle, $wgContLang;
 626
 627                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 628                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 629                 $this->setRobotpolicy( 'noindex,nofollow' );
 630                 $this->setArticleFlag( false );
 631                 $this->mBodytext = '';
 632                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 633
 634                 # We put a comment in the .html file so a Sysop can diagnose the page the
 635                 # user can't see.
 636                 $this->addHTML( "\n<!--" .
 637                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 638                                                 ':' .
 639                                                 $wgTitle->getDBkey() . '-->' );
 640                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 641         }
 642
 643         function databaseError( $fname, $sql, $error, $errno ) {
 644                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 645
 646                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 647                 $this->setRobotpolicy( 'noindex,nofollow' );
 648                 $this->setArticleRelated( false );
 649                 $this->enableClientCache( false );
 650                 $this->mRedirect = '';
 651
 652                 if( !$wgShowSQLErrors ) {
 653                         $sql = wfMsg( 'sqlhidden' );
 654                 }
 655
 656                 if ( $wgCommandLineMode ) {
 657                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 658                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 659                 } else {
 660                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 661                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 662                 }
 663
 664                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 665                         print $msg."\n";
 666                         wfErrorExit();
 667                 }
 668                 $this->mBodytext = $msg;
 669                 $this->output();
 670                 wfErrorExit();
 671         }
 672
 673         function readOnlyPage( $source = null, $protected = false ) {
 674                 global $wgUser, $wgReadOnlyFile, $wgReadOnly;
 675
 676                 $this->setRobotpolicy( 'noindex,nofollow' );
 677                 $this->setArticleRelated( false );
 678
 679                 if( $protected ) {
 680                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 681                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 682                 } else {
 683                         $this->setPageTitle( wfMsg( 'readonly' ) );
 684                         if ( $wgReadOnly ) {
 685                                 $reason = $wgReadOnly;
 686                         } else {
 687                                 $reason = file_get_contents( $wgReadOnlyFile );
 688                         }
 689                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 690                 }
 691
 692                 if( is_string( $source ) ) {
 693                         if( strcmp( $source, '' ) == 0 ) {
 694                                 $source = wfMsg( 'noarticletext' );
 695                         }
 696                         $rows = $wgUser->getOption( 'rows' );
 697                         $cols = $wgUser->getOption( 'cols' );
 698                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 699                                 htmlspecialchars( $source ) . "\n</textarea>";
 700                         $this->addHTML( $text );
 701                 }
 702
 703                 $this->returnToMain( false );
 704         }
 705
 706         function fatalError( $message ) {
 707                 $this->setPageTitle( wfMsg( "internalerror" ) );
 708                 $this->setRobotpolicy( "noindex,nofollow" );
 709                 $this->setArticleRelated( false );
 710                 $this->enableClientCache( false );
 711                 $this->mRedirect = '';
 712
 713                 $this->mBodytext = $message;
 714                 $this->output();
 715                 wfErrorExit();
 716         }
 717
 718         function unexpectedValueError( $name, $val ) {
 719                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 720         }
 721
 722         function fileCopyError( $old, $new ) {
 723                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 724         }
 725
 726         function fileRenameError( $old, $new ) {
 727                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 728         }
 729
 730         function fileDeleteError( $name ) {
 731                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 732         }
 733
 734         function fileNotFoundError( $name ) {
 735                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 736         }
 737
 738         /**
 739          * return from error messages or notes
 740          * @param $auto automatically redirect the user after 10 seconds
 741          * @param $returnto page title to return to. Default is Main Page.
 742          */
 743         function returnToMain( $auto = true, $returnto = NULL ) {
 744                 global $wgUser, $wgOut, $wgRequest;
 745
 746                 if ( $returnto == NULL ) {
 747                         $returnto = $wgRequest->getText( 'returnto' );
 748                 }
 749                 $returnto = htmlspecialchars( $returnto );
 750
 751                 $sk = $wgUser->getSkin();
 752                 if ( '' == $returnto ) {
 753                         $returnto = wfMsgForContent( 'mainpage' );
 754                 }
 755                 $link = $sk->makeKnownLink( $returnto, '' );
 756
 757                 $r = wfMsg( 'returnto', $link );
 758                 if ( $auto ) {
 759                         $titleObj = Title::newFromText( $returnto );
 760                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 761                 }
 762                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 763         }
 764
 765         /**
 766          * This function takes the existing and broken links for the page
 767          * and uses the first 10 of them for META keywords
 768          */
 769         function addMetaTags () {
 770                 global $wgLinkCache , $wgOut ;
 771                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 772                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 773                 $a = array_merge ( $good , $bad ) ;
 774                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 775                 $a = implode ( ',' , $a ) ;
 776                 $strip = array(
 777                         "/<.*?>/" => '',
 778                         "/_/" => ' '
 779                 );
 780                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 781
 782                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 783         }
 784
 785         /**
 786          * @private
 787          * @return string
 788          */
 789         function headElement() {
 790                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 791                 global $wgUser, $wgContLang, $wgRequest;
 792
 793                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 794                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 795                 } else {
 796                         $ret = '';
 797                 }
 798
 799                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 800
 801                 if ( "" == $this->mHTMLtitle ) {
 802                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 803                 }
 804
 805                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 806                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 807                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 808                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 809
 810                 $ret .= $this->getHeadLinks();
 811                 global $wgStylePath;
 812                 if( $this->isPrintable() ) {
 813                         $media = '';
 814                 } else {
 815                         $media = "media='print'";
 816                 }
 817                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 818                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 819
 820                 $sk = $wgUser->getSkin();
 821                 $ret .= $sk->getHeadScripts();
 822                 $ret .= $this->mScripts;
 823                 $ret .= $sk->getUserStyles();
 824
 825                 $ret .= "</head>\n";
 826                 return $ret;
 827         }
 828
 829         function getHeadLinks() {
 830                 global $wgRequest, $wgStylePath;
 831                 $ret = '';
 832                 foreach ( $this->mMetatags as $tag ) {
 833                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 834                                 $a = 'http-equiv';
 835                                 $tag[0] = substr( $tag[0], 5 );
 836                         } else {
 837                                 $a = 'name';
 838                         }
 839                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 840                 }
 841                 $p = $this->mRobotpolicy;
 842                 if ( '' == $p ) { $p = 'index,follow'; }
 843                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 844
 845                 if ( count( $this->mKeywords ) > 0 ) {
 846                         $strip = array(
 847                                 "/<.*?>/" => '',
 848                                 "/_/" => ' '
 849                         );
 850                         $ret .= "<meta name=\"keywords\" content=\"" .
 851                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 852                 }
 853                 foreach ( $this->mLinktags as $tag ) {
 854                         $ret .= '<link';
 855                         foreach( $tag as $attr => $val ) {
 856                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 857                         }
 858                         $ret .= " />\n";
 859                 }
 860                 if( $this->isSyndicated() ) {
 861                         # FIXME: centralize the mime-type and name information in Feed.php
 862                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 863                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 864                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 865                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 866                 }
 867
 868                 return $ret;
 869         }
 870
 871         /**
 872          * Run any necessary pre-output transformations on the buffer text
 873          */
 874         function transformBuffer( $options = 0 ) {
 875         }
 876
 877
 878         /**
 879          * Turn off regular page output and return an error reponse
 880          * for when rate limiting has triggered.
 881          * @todo: i18n
 882          * @access public
 883          */
 884         function rateLimited() {
 885                 global $wgOut;
 886                 $wgOut->disable();
 887                 wfHttpError( 500, 'Internal Server Error',
 888                         'Sorry, the server has encountered an internal error. ' .
 889                         'Please wait a moment and hit "refresh" to submit the request again.' );
 890         }
 891
 892 }
 893
 894 } // MediaWiki
 895
 896 ?>