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 = $str; }
 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 debug( $text ) { $this->mDebugtext .= $text; }
 223
 224         function setParserOptions( $options ) {
 225                 return wfSetVar( $this->mParserOptions, $options );
 226         }
 227
 228         /**
 229          * Convert wikitext to HTML and add it to the buffer
 230          * Default assumes that the current page title will
 231          * be used.
 232          */
 233         function addWikiText( $text, $linestart = true ) {
 234                 global $wgTitle;
 235                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 236         }
 237
 238         function addWikiTextWithTitle($text, &$title, $linestart = true) {
 239                 $this->addWikiTextTitle($text, $title, $linestart);
 240         }
 241
 242         function addWikiTextTitle($text, &$title, $linestart) {
 243                 global $wgParser, $wgUseTidy;
 244                 $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions, $linestart );
 245                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 246                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 247                 $this->addHTML( $parserOutput->getText() );
 248         }
 249
 250         /**
 251          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 252          * Saves the text into the parser cache if possible
 253          */
 254         function addPrimaryWikiText( $text, $cacheArticle ) {
 255                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 256
 257                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 258
 259                 $text = $parserOutput->getText();
 260
 261                 if ( $cacheArticle ) {
 262                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 263                 }
 264
 265                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 266                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 267                 $this->addHTML( $text );
 268         }
 269
 270         /**
 271          * Add the output of a QuickTemplate to the output buffer
 272          * @param QuickTemplate $template
 273          */
 274         function addTemplate( &$template ) {
 275                 ob_start();
 276                 $template->execute();
 277                 $this->addHtml( ob_get_contents() );
 278                 ob_end_clean();
 279         }
 280
 281         /**
 282          * Parse wikitext and return the HTML. This is for special pages that add the text later
 283          */
 284         function parse( $text, $linestart = true ) {
 285                 global $wgParser, $wgTitle;
 286                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 287                 return $parserOutput->getText();
 288         }
 289
 290         /**
 291          * @param $article
 292          * @param $user
 293          *
 294          * @return bool
 295          */
 296         function tryParserCache( $article, $user ) {
 297                 global $wgParserCache;
 298                 $parserOutput = $wgParserCache->get( $article, $user );
 299                 if ( $parserOutput !== false ) {
 300                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 301                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 302                         $this->addHTML( $parserOutput->getText() );
 303                         $t = $parserOutput->getTitleText();
 304                         if( !empty( $t ) ) {
 305                                 $this->setPageTitle( $t );
 306                         }
 307                         return true;
 308                 } else {
 309                         return false;
 310                 }
 311         }
 312
 313         /**
 314          * Set the maximum cache time on the Squid in seconds
 315          * @param $maxage
 316          */
 317         function setSquidMaxage( $maxage ) {
 318                 $this->mSquidMaxage = $maxage;
 319         }
 320
 321         /**
 322          * Use enableClientCache(false) to force it to send nocache headers
 323          * @param $state
 324          */
 325         function enableClientCache( $state ) {
 326                 return wfSetVar( $this->mEnableClientCache, $state );
 327         }
 328
 329         function sendCacheControl() {
 330                 global $wgUseSquid, $wgUseESI;
 331                 # don't serve compressed data to clients who can't handle it
 332                 # maintain different caches for logged-in users and non-logged in ones
 333                 header( 'Vary: Accept-Encoding, Cookie' );
 334                 if( $this->mEnableClientCache ) {
 335                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 336                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 337                         {
 338                                 if ( $wgUseESI ) {
 339                                         # We'll purge the proxy cache explicitly, but require end user agents
 340                                         # to revalidate against the proxy on each visit.
 341                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 342                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 343                                         # start with a shorter timeout for initial testing
 344                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 345                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 346                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 347                                 } else {
 348                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 349                                         # to revalidate against the proxy on each visit.
 350                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 351                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 352                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 353                                         # start with a shorter timeout for initial testing
 354                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 355                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 356                                 }
 357                         } else {
 358                                 # We do want clients to cache if they can, but they *must* check for updates
 359                                 # on revisiting the page.
 360                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 361                                 header( "Expires: -1" );
 362                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 363                         }
 364                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 365                 } else {
 366                         wfDebug( "** no caching **\n", false );
 367
 368                         # In general, the absence of a last modified header should be enough to prevent
 369                         # the client from using its cache. We send a few other things just to make sure.
 370                         header( 'Expires: -1' );
 371                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 372                         header( 'Pragma: no-cache' );
 373                 }
 374         }
 375
 376         /**
 377          * Finally, all the text has been munged and accumulated into
 378          * the object, let's actually output it:
 379          */
 380         function output() {
 381                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 382                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 383                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 384
 385                 if( $this->mDoNothing ){
 386                         return;
 387                 }
 388                 $fname = 'OutputPage::output';
 389                 wfProfileIn( $fname );
 390                 $sk = $wgUser->getSkin();
 391
 392                 if ( '' != $this->mRedirect ) {
 393                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 394                                 # Standards require redirect URLs to be absolute
 395                                 global $wgServer;
 396                                 $this->mRedirect = $wgServer . $this->mRedirect;
 397                         }
 398                         if( $this->mRedirectCode == '301') {
 399                                 if( !$wgDebugRedirects ) {
 400                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 401                                 }
 402                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 403                         }
 404
 405                         $this->sendCacheControl();
 406
 407                         if( $wgDebugRedirects ) {
 408                                 $url = htmlspecialchars( $this->mRedirect );
 409                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 410                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 411                                 print "</body>\n</html>\n";
 412                         } else {
 413                                 header( 'Location: '.$this->mRedirect );
 414                         }
 415                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 416                         return;
 417                 }
 418
 419
 420                 # Buffer output; final headers may depend on later processing
 421                 ob_start();
 422
 423                 $this->transformBuffer();
 424
 425                 # Disable temporary placeholders, so that the skin produces HTML
 426                 $sk->postParseLinkColour( false );
 427
 428                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 429                 header( 'Content-language: '.$wgContLanguageCode );
 430
 431                 $exp = time() + $wgCookieExpiration;
 432                 foreach( $this->mCookies as $name => $val ) {
 433                         setcookie( $name, $val, $exp, '/' );
 434                 }
 435
 436                 wfProfileIn( 'Output-skin' );
 437                 $sk->outputPage( $this );
 438                 wfProfileOut( 'Output-skin' );
 439
 440                 $this->sendCacheControl();
 441                 ob_end_flush();
 442         }
 443
 444         function out( $ins ) {
 445                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 446                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 447                         $outs = $ins;
 448                 } else {
 449                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 450                         if ( false === $outs ) { $outs = $ins; }
 451                 }
 452                 print $outs;
 453         }
 454
 455         function setEncodings() {
 456                 global $wgInputEncoding, $wgOutputEncoding;
 457                 global $wgUser, $wgContLang;
 458
 459                 $wgInputEncoding = strtolower( $wgInputEncoding );
 460
 461                 if( $wgUser->getOption( 'altencoding' ) ) {
 462                         $wgContLang->setAltEncoding();
 463                         return;
 464                 }
 465
 466                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 467                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 468                         return;
 469                 }
 470
 471                 /*
 472                 # This code is unused anyway!
 473                 # Commenting out. --bv 2003-11-15
 474
 475                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 476                 $best = 0.0;
 477                 $bestset = "*";
 478
 479                 foreach ( $a as $s ) {
 480                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 481                                 $set = $m[1];
 482                                 $q = (float)($m[2]);
 483                         } else {
 484                                 $set = $s;
 485                                 $q = 1.0;
 486                         }
 487                         if ( $q > $best ) {
 488                                 $bestset = $set;
 489                                 $best = $q;
 490                         }
 491                 }
 492                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 493                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 494                 $wgOutputEncoding = strtolower( $bestset );
 495
 496 # Disable for now
 497 #
 498                 */
 499                 $wgOutputEncoding = $wgInputEncoding;
 500         }
 501
 502         /**
 503          * Returns a HTML comment with the elapsed time since request.
 504          * This method has no side effects.
 505          * @return string
 506          */
 507         function reportTime() {
 508                 global $wgRequestTime;
 509
 510                 $now = wfTime();
 511                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 512                 $start = (float)$sec + (float)$usec;
 513                 $elapsed = $now - $start;
 514
 515                 # Use real server name if available, so we know which machine
 516                 # in a server farm generated the current page.
 517                 if ( function_exists( 'posix_uname' ) ) {
 518                         $uname = @posix_uname();
 519                 } else {
 520                         $uname = false;
 521                 }
 522                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 523                         $hostname = $uname['nodename'];
 524                 } else {
 525                         # This may be a virtual server.
 526                         $hostname = $_SERVER['SERVER_NAME'];
 527                 }
 528                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 529                   $hostname, $elapsed );
 530                 return $com;
 531         }
 532
 533         /**
 534          * Note: these arguments are keys into wfMsg(), not text!
 535          */
 536         function errorpage( $title, $msg ) {
 537                 global $wgTitle;
 538
 539                 $this->mDebugtext .= 'Original title: ' .
 540                   $wgTitle->getPrefixedText() . "\n";
 541                 $this->setPageTitle( wfMsg( $title ) );
 542                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 543                 $this->setRobotpolicy( 'noindex,nofollow' );
 544                 $this->setArticleRelated( false );
 545                 $this->enableClientCache( false );
 546                 $this->mRedirect = '';
 547
 548                 $this->mBodytext = '';
 549                 $this->addWikiText( wfMsg( $msg ) );
 550                 $this->returnToMain( false );
 551
 552                 $this->output();
 553                 wfErrorExit();
 554         }
 555
 556         function sysopRequired() {
 557                 global $wgUser;
 558
 559                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 560                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 561                 $this->setRobotpolicy( 'noindex,nofollow' );
 562                 $this->setArticleRelated( false );
 563                 $this->mBodytext = '';
 564
 565                 $sk = $wgUser->getSkin();
 566                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 567                 $this->addHTML( wfMsg( 'sysoptext', $ap ) );
 568                 $this->returnToMain();
 569         }
 570
 571         function developerRequired() {
 572                 global $wgUser;
 573
 574                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 575                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 576                 $this->setRobotpolicy( 'noindex,nofollow' );
 577                 $this->setArticleRelated( false );
 578                 $this->mBodytext = '';
 579
 580                 $sk = $wgUser->getSkin();
 581                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 582                 $this->addHTML( wfMsg( 'developertext', $ap ) );
 583                 $this->returnToMain();
 584         }
 585
 586         function loginToUse() {
 587                 global $wgUser, $wgTitle, $wgContLang;
 588
 589                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 590                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 591                 $this->setRobotpolicy( 'noindex,nofollow' );
 592                 $this->setArticleFlag( false );
 593                 $this->mBodytext = '';
 594                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 595
 596                 # We put a comment in the .html file so a Sysop can diagnose the page the
 597                 # user can't see.
 598                 $this->addHTML( "\n<!--" .
 599                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 600                                                 ':' .
 601                                                 $wgTitle->getDBkey() . '-->' );
 602                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 603         }
 604
 605         function databaseError( $fname, $sql, $error, $errno ) {
 606                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 607
 608                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 609                 $this->setRobotpolicy( 'noindex,nofollow' );
 610                 $this->setArticleRelated( false );
 611                 $this->enableClientCache( false );
 612                 $this->mRedirect = '';
 613
 614                 if( !$wgShowSQLErrors ) {
 615                         $sql = wfMsg( 'sqlhidden' );
 616                 }
 617
 618                 if ( $wgCommandLineMode ) {
 619                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 620                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 621                 } else {
 622                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 623                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 624                 }
 625
 626                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 627                         print $msg."\n";
 628                         wfErrorExit();
 629                 }
 630                 $this->mBodytext = $msg;
 631                 $this->output();
 632                 wfErrorExit();
 633         }
 634
 635         function readOnlyPage( $source = null, $protected = false ) {
 636                 global $wgUser, $wgReadOnlyFile;
 637
 638                 $this->setRobotpolicy( 'noindex,nofollow' );
 639                 $this->setArticleRelated( false );
 640
 641                 if( $protected ) {
 642                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 643                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 644                 } else {
 645                         $this->setPageTitle( wfMsg( 'readonly' ) );
 646                         $reason = file_get_contents( $wgReadOnlyFile );
 647                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 648                 }
 649
 650                 if( is_string( $source ) ) {
 651                         if( strcmp( $source, '' ) == 0 ) {
 652                                 $source = wfMsg( 'noarticletext' );
 653                         }
 654                         $rows = $wgUser->getOption( 'rows' );
 655                         $cols = $wgUser->getOption( 'cols' );
 656                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 657                                 htmlspecialchars( $source ) . "\n</textarea>";
 658                         $this->addHTML( $text );
 659                 }
 660
 661                 $this->returnToMain( false );
 662         }
 663
 664         function fatalError( $message ) {
 665                 $this->setPageTitle( wfMsg( "internalerror" ) );
 666                 $this->setRobotpolicy( "noindex,nofollow" );
 667                 $this->setArticleRelated( false );
 668                 $this->enableClientCache( false );
 669                 $this->mRedirect = '';
 670
 671                 $this->mBodytext = $message;
 672                 $this->output();
 673                 wfErrorExit();
 674         }
 675
 676         function unexpectedValueError( $name, $val ) {
 677                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 678         }
 679
 680         function fileCopyError( $old, $new ) {
 681                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 682         }
 683
 684         function fileRenameError( $old, $new ) {
 685                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 686         }
 687
 688         function fileDeleteError( $name ) {
 689                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 690         }
 691
 692         function fileNotFoundError( $name ) {
 693                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 694         }
 695
 696         /**
 697          * return from error messages or notes
 698          * @param $auto automatically redirect the user after 10 seconds
 699          * @param $returnto page title to return to. Default is Main Page.
 700          */
 701         function returnToMain( $auto = true, $returnto = NULL ) {
 702                 global $wgUser, $wgOut, $wgRequest;
 703
 704                 if ( $returnto == NULL ) {
 705                         $returnto = $wgRequest->getText( 'returnto' );
 706                 }
 707                 $returnto = htmlspecialchars( $returnto );
 708
 709                 $sk = $wgUser->getSkin();
 710                 if ( '' == $returnto ) {
 711                         $returnto = wfMsgForContent( 'mainpage' );
 712                 }
 713                 $link = $sk->makeKnownLink( $returnto, '' );
 714
 715                 $r = wfMsg( 'returnto', $link );
 716                 if ( $auto ) {
 717                         $titleObj = Title::newFromText( $returnto );
 718                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 719                 }
 720                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 721         }
 722
 723         /**
 724          * This function takes the existing and broken links for the page
 725          * and uses the first 10 of them for META keywords
 726          */
 727         function addMetaTags () {
 728                 global $wgLinkCache , $wgOut ;
 729                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 730                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 731                 $a = array_merge ( $good , $bad ) ;
 732                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 733                 $a = implode ( ',' , $a ) ;
 734                 $strip = array(
 735                         "/<.*?>/" => '',
 736                         "/_/" => ' '
 737                 );
 738                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 739
 740                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 741         }
 742
 743         /**
 744          * @private
 745          * @return string
 746          */
 747         function headElement() {
 748                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 749                 global $wgUser, $wgContLang, $wgRequest;
 750
 751                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 752                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 753                 } else {
 754                         $ret = '';
 755                 }
 756
 757                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 758
 759                 if ( "" == $this->mHTMLtitle ) {
 760                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 761                 }
 762
 763                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 764                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 765                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 766                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 767
 768                 $ret .= $this->getHeadLinks();
 769                 global $wgStylePath;
 770                 if( $this->isPrintable() ) {
 771                         $media = '';
 772                 } else {
 773                         $media = "media='print'";
 774                 }
 775                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 776                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 777
 778                 $sk = $wgUser->getSkin();
 779                 $ret .= $sk->getHeadScripts();
 780                 $ret .= $this->mScripts;
 781                 $ret .= $sk->getUserStyles();
 782
 783                 $ret .= "</head>\n";
 784                 return $ret;
 785         }
 786
 787         function getHeadLinks() {
 788                 global $wgRequest, $wgStylePath;
 789                 $ret = '';
 790                 foreach ( $this->mMetatags as $tag ) {
 791                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 792                                 $a = 'http-equiv';
 793                                 $tag[0] = substr( $tag[0], 5 );
 794                         } else {
 795                                 $a = 'name';
 796                         }
 797                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 798                 }
 799                 $p = $this->mRobotpolicy;
 800                 if ( '' == $p ) { $p = 'index,follow'; }
 801                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 802
 803                 if ( count( $this->mKeywords ) > 0 ) {
 804                         $strip = array(
 805                                 "/<.*?>/" => '',
 806                                 "/_/" => ' '
 807                         );
 808                         $ret .= "<meta name=\"keywords\" content=\"" .
 809                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 810                 }
 811                 foreach ( $this->mLinktags as $tag ) {
 812                         $ret .= '<link';
 813                         foreach( $tag as $attr => $val ) {
 814                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 815                         }
 816                         $ret .= " />\n";
 817                 }
 818                 if( $this->isSyndicated() ) {
 819                         # FIXME: centralize the mime-type and name information in Feed.php
 820                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 821                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 822                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 823                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 824                 }
 825
 826                 return $ret;
 827         }
 828
 829         /**
 830          * Run any necessary pre-output transformations on the buffer text
 831          */
 832         function transformBuffer( $options = 0 ) {
 833         }
 834
 835
 836         /**
 837          * Turn off regular page output and return an error reponse
 838          * for when rate limiting has triggered.
 839          * @todo: i18n
 840          * @access public
 841          */
 842         function rateLimited() {
 843                 global $wgOut;
 844                 $wgOut->disable();
 845                 wfHttpError( 500, 'Internal Server Error',
 846                         'Sorry, the server has encountered an internal error. ' .
 847                         'Please wait a moment and hit "refresh" to submit the request again.' );
 848         }
 849
 850 }
 851
 852 } // MediaWiki
 853
 854 ?>