includes/OutputPage.php

   1 <?php
   2 if ( ! defined( 'MEDIAWIKI' ) )
   3         die( -1 );
   4 /**
   5  * @package MediaWiki
   6  */
   7
   8 if ( $wgUseTeX )
   9         require_once 'Math.php';
  10
  11 /**
  12  * @todo document
  13  * @package MediaWiki
  14  */
  15 class OutputPage {
  16         var $mHeaders, $mMetatags, $mKeywords;
  17         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  18         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  19         var $mSubtitle, $mRedirect, $mStatusCode;
  20         var $mLastModified, $mETag, $mCategoryLinks;
  21         var $mScripts, $mLinkColours;
  22
  23         var $mSuppressQuickbar;
  24         var $mOnloadHandler;
  25         var $mDoNothing;
  26         var $mContainsOldMagic, $mContainsNewMagic;
  27         var $mIsArticleRelated;
  28         var $mParserOptions;
  29         var $mShowFeedLinks = false;
  30         var $mEnableClientCache = true;
  31         var $mArticleBodyOnly = false;
  32
  33         /**
  34          * Constructor
  35          * Initialise private variables
  36          */
  37         function OutputPage() {
  38                 $this->mHeaders = $this->mMetatags =
  39                 $this->mKeywords = $this->mLinktags = array();
  40                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  41                 $this->mRedirect = $this->mLastModified =
  42                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  43                 $this->mOnloadHandler = '';
  44                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  45                 $this->mSuppressQuickbar = $this->mPrintable = false;
  46                 $this->mLanguageLinks = array();
  47                 $this->mCategoryLinks = array() ;
  48                 $this->mDoNothing = false;
  49                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  50                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  51                 $this->mSquidMaxage = 0;
  52                 $this->mScripts = '';
  53                 $this->mETag = false;
  54                 $this->mRevisionId = null;
  55         }
  56
  57         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
  58         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  59         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  60
  61         # To add an http-equiv meta tag, precede the name with "http:"
  62         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  63         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  64         function addScript( $script ) { $this->mScripts .= $script; }
  65         function getScript() { return $this->mScripts; }
  66
  67         function setETag($tag) { $this->mETag = $tag; }
  68         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
  69         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
  70
  71         function addLink( $linkarr ) {
  72                 # $linkarr should be an associative array of attributes. We'll escape on output.
  73                 array_push( $this->mLinktags, $linkarr );
  74         }
  75
  76         function addMetadataLink( $linkarr ) {
  77                 # note: buggy CC software only reads first "meta" link
  78                 static $haveMeta = false;
  79                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  80                 $this->addLink( $linkarr );
  81                 $haveMeta = true;
  82         }
  83
  84         /**
  85          * checkLastModified tells the client to use the client-cached page if
  86          * possible. If sucessful, the OutputPage is disabled so that
  87          * any future call to OutputPage->output() have no effect. The method
  88          * returns true iff cache-ok headers was sent.
  89          */
  90         function checkLastModified ( $timestamp ) {
  91                 global $wgCachePages, $wgUser;
  92                 if ( !$timestamp || $timestamp == '19700101000000' ) {
  93                         wfDebug( "CACHE DISABLED, NO TIMESTAMP\n" );
  94                         return;
  95                 }
  96                 if( !$wgCachePages ) {
  97                         wfDebug( "CACHE DISABLED\n", false );
  98                         return;
  99                 }
 100                 if( $wgUser->getOption( 'nocache' ) ) {
 101                         wfDebug( "USER DISABLED CACHE\n", false );
 102                         return;
 103                 }
 104
 105                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 106                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
 107
 108                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 109                         # IE sends sizes after the date like this:
 110                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 111                         # this breaks strtotime().
 112                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 113                         $modsinceTime = strtotime( $modsince );
 114                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 115                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 116                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 117                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) ) {
 118                                 # Make sure you're in a place you can leave when you call us!
 119                                 header( "HTTP/1.0 304 Not Modified" );
 120                                 $this->mLastModified = $lastmod;
 121                                 $this->sendCacheControl();
 122                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 123                                 $this->disable();
 124                                 @ob_end_clean(); // Don't output compressed blob
 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                         case 'delete':
 141                         case 'protect':
 142                         case 'unprotect':
 143                         case 'watch':
 144                         case 'unwatch':
 145                                 // Display title is already customized
 146                                 return '';
 147                         case 'history':
 148                                 return wfMsg('history_short');
 149                         case 'submit':
 150                                 // FIXME: bug 2735; not correct for special pages etc
 151                                 return wfMsg('preview');
 152                         case 'info':
 153                                 return wfMsg('info_short');
 154                         default:
 155                                 return '';
 156                 }
 157         }
 158
 159         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 160         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 161         function setPageTitle( $name ) {
 162                 global $action, $wgContLang;
 163                 $name = $wgContLang->convert($name, true);
 164                 $this->mPagetitle = $name;
 165                 if(!empty($action)) {
 166                         $taction =  $this->getPageTitleActionText();
 167                         if( !empty( $taction ) ) {
 168                                 $name .= ' - '.$taction;
 169                         }
 170                 }
 171
 172                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 173         }
 174         function getHTMLTitle() { return $this->mHTMLtitle; }
 175         function getPageTitle() { return $this->mPagetitle; }
 176         function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 177         function getSubtitle() { return $this->mSubtitle; }
 178         function isArticle() { return $this->mIsarticle; }
 179         function setPrintable() { $this->mPrintable = true; }
 180         function isPrintable() { return $this->mPrintable; }
 181         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 182         function isSyndicated() { return $this->mShowFeedLinks; }
 183         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 184         function getOnloadHandler() { return $this->mOnloadHandler; }
 185         function disable() { $this->mDoNothing = true; }
 186
 187         function setArticleRelated( $v ) {
 188                 $this->mIsArticleRelated = $v;
 189                 if ( !$v ) {
 190                         $this->mIsarticle = false;
 191                 }
 192         }
 193         function setArticleFlag( $v ) {
 194                 $this->mIsarticle = $v;
 195                 if ( $v ) {
 196                         $this->mIsArticleRelated = $v;
 197                 }
 198         }
 199
 200         function isArticleRelated() { return $this->mIsArticleRelated; }
 201
 202         function getLanguageLinks() { return $this->mLanguageLinks; }
 203         function addLanguageLinks($newLinkArray) {
 204                 $this->mLanguageLinks += $newLinkArray;
 205         }
 206         function setLanguageLinks($newLinkArray) {
 207                 $this->mLanguageLinks = $newLinkArray;
 208         }
 209
 210         function getCategoryLinks() {
 211                 return $this->mCategoryLinks;
 212         }
 213
 214         /**
 215          * Add an array of categories, with names in the keys
 216          */
 217         function addCategoryLinks($categories) {
 218                 global $wgUser, $wgContLang;
 219
 220                 # Add the links to the link cache in a batch
 221                 $arr = array( NS_CATEGORY => $categories );
 222                 $lb = new LinkBatch;
 223                 $lb->setArray( $arr );
 224                 $lb->execute();
 225
 226                 $sk =& $wgUser->getSkin();
 227                 foreach ( $categories as $category => $arbitrary ) {
 228                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 229                         $text = $wgContLang->convertHtml( $title->getText() );
 230                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 231                 }
 232         }
 233
 234         function setCategoryLinks($categories) {
 235                 $this->mCategoryLinks = array();
 236                 $this->addCategoryLinks($categories);
 237         }
 238
 239         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 240         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 241
 242         function addHTML( $text ) { $this->mBodytext .= $text; }
 243         function clearHTML() { $this->mBodytext = ''; }
 244         function getHTML() { return $this->mBodytext; }
 245         function debug( $text ) { $this->mDebugtext .= $text; }
 246
 247         /* @deprecated */
 248         function setParserOptions( $options ) {
 249                 return $this->ParserOptions( $options );
 250         }
 251
 252         function ParserOptions( $options = null ) {
 253                 return wfSetVar( $this->mParserOptions, $options );
 254         }
 255
 256         /**
 257          * Set the revision ID which will be seen by the wiki text parser
 258          * for things such as embedded {{REVISIONID}} variable use.
 259          * @param mixed $revid an integer, or NULL
 260          * @return mixed previous value
 261          */
 262         function setRevisionId( $revid ) {
 263                 $val = is_null( $revid ) ? null : intval( $revid );
 264                 return wfSetVar( $this->mRevisionId, $val );
 265         }
 266
 267         /**
 268          * Convert wikitext to HTML and add it to the buffer
 269          * Default assumes that the current page title will
 270          * be used.
 271          */
 272         function addWikiText( $text, $linestart = true ) {
 273                 global $wgTitle;
 274                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 275         }
 276
 277         function addWikiTextWithTitle($text, &$title, $linestart = true) {
 278                 $this->addWikiTextTitle($text, $title, $linestart);
 279         }
 280
 281         function addWikiTextTitle($text, &$title, $linestart) {
 282                 global $wgParser;
 283                 $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions,
 284                         $linestart, true, $this->mRevisionId );
 285                 $this->addParserOutput( $parserOutput );
 286         }
 287
 288         function addParserOutputNoText( &$parserOutput ) {
 289                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 290                 $this->addCategoryLinks( $parserOutput->getCategories() );
 291                 $this->addKeywords( $parserOutput );
 292                 if ( $parserOutput->getCacheTime() == -1 ) {
 293                         $this->enableClientCache( false );
 294                 }
 295         }
 296
 297         function addParserOutput( &$parserOutput ) {
 298                 $this->addParserOutputNoText( $parserOutput );
 299                 $this->addHTML( $parserOutput->getText() );
 300         }
 301
 302         /**
 303          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 304          * Saves the text into the parser cache if possible
 305          */
 306         function addPrimaryWikiText( $text, $article, $cache = true ) {
 307                 global $wgParser, $wgUser;
 308
 309                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 310                         $this->mParserOptions, true, true, $this->mRevisionId );
 311
 312                 if ( $article && $parserOutput->getCacheTime() != -1 ) {
 313                         $parserCache =& ParserCache::singleton();
 314                         $parserCache->save( $parserOutput, $article, $wgUser );
 315                 }
 316
 317                 $this->addParserOutput( $parserOutput );
 318         }
 319
 320         /**
 321          * Add the output of a QuickTemplate to the output buffer
 322          * @param QuickTemplate $template
 323          */
 324         function addTemplate( &$template ) {
 325                 ob_start();
 326                 $template->execute();
 327                 $this->addHTML( ob_get_contents() );
 328                 ob_end_clean();
 329         }
 330
 331         /**
 332          * Parse wikitext and return the HTML. This is for special pages that add the text later
 333          */
 334         function parse( $text, $linestart = true ) {
 335                 global $wgParser, $wgTitle;
 336                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions,
 337                         $linestart, true, $this->mRevisionId );
 338                 return $parserOutput->getText();
 339         }
 340
 341         /**
 342          * @param $article
 343          * @param $user
 344          *
 345          * @return bool
 346          */
 347         function tryParserCache( $article, $user ) {
 348                 $parserCache =& ParserCache::singleton();
 349                 $parserOutput = $parserCache->get( $article, $user );
 350                 if ( $parserOutput !== false ) {
 351                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 352                         $this->addCategoryLinks( $parserOutput->getCategories() );
 353                         $this->addKeywords( $parserOutput );
 354                         $this->addHTML( $parserOutput->getText() );
 355                         $t = $parserOutput->getTitleText();
 356                         if( !empty( $t ) ) {
 357                                 $this->setPageTitle( $t );
 358                         }
 359                         return true;
 360                 } else {
 361                         return false;
 362                 }
 363         }
 364
 365         /**
 366          * Set the maximum cache time on the Squid in seconds
 367          * @param $maxage
 368          */
 369         function setSquidMaxage( $maxage ) {
 370                 $this->mSquidMaxage = $maxage;
 371         }
 372
 373         /**
 374          * Use enableClientCache(false) to force it to send nocache headers
 375          * @param $state
 376          */
 377         function enableClientCache( $state ) {
 378                 return wfSetVar( $this->mEnableClientCache, $state );
 379         }
 380
 381         function uncacheableBecauseRequestvars() {
 382                 global $wgRequest;
 383                 return  $wgRequest->getText('useskin', false) === false
 384                         && $wgRequest->getText('uselang', false) === false;
 385         }
 386
 387         function sendCacheControl() {
 388                 global $wgUseSquid, $wgUseESI, $wgSquidMaxage;
 389
 390                 if ($this->mETag)
 391                         header("ETag: $this->mETag");
 392
 393                 # don't serve compressed data to clients who can't handle it
 394                 # maintain different caches for logged-in users and non-logged in ones
 395                 header( 'Vary: Accept-Encoding, Cookie' );
 396                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 397                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 398                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 399                         {
 400                                 if ( $wgUseESI ) {
 401                                         # We'll purge the proxy cache explicitly, but require end user agents
 402                                         # to revalidate against the proxy on each visit.
 403                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 404                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 405                                         # start with a shorter timeout for initial testing
 406                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 407                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 408                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 409                                 } else {
 410                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 411                                         # to revalidate against the proxy on each visit.
 412                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 413                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 414                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 415                                         # start with a shorter timeout for initial testing
 416                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 417                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 418                                 }
 419                         } else {
 420                                 # We do want clients to cache if they can, but they *must* check for updates
 421                                 # on revisiting the page.
 422                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 423                                 header( "Expires: -1" );
 424                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 425                         }
 426                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 427                 } else {
 428                         wfDebug( "** no caching **\n", false );
 429
 430                         # In general, the absence of a last modified header should be enough to prevent
 431                         # the client from using its cache. We send a few other things just to make sure.
 432                         header( 'Expires: -1' );
 433                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 434                         header( 'Pragma: no-cache' );
 435                 }
 436         }
 437
 438         /**
 439          * Finally, all the text has been munged and accumulated into
 440          * the object, let's actually output it:
 441          */
 442         function output() {
 443                 global $wgUser, $wgOutputEncoding;
 444                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType, $wgProfiler;
 445
 446                 if( $this->mDoNothing ){
 447                         return;
 448                 }
 449                 $fname = 'OutputPage::output';
 450                 wfProfileIn( $fname );
 451                 $sk = $wgUser->getSkin();
 452
 453                 if ( '' != $this->mRedirect ) {
 454                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 455                                 # Standards require redirect URLs to be absolute
 456                                 global $wgServer;
 457                                 $this->mRedirect = $wgServer . $this->mRedirect;
 458                         }
 459                         if( $this->mRedirectCode == '301') {
 460                                 if( !$wgDebugRedirects ) {
 461                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 462                                 }
 463                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 464                         }
 465
 466                         $this->sendCacheControl();
 467
 468                         if( $wgDebugRedirects ) {
 469                                 $url = htmlspecialchars( $this->mRedirect );
 470                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 471                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 472                                 print "</body>\n</html>\n";
 473                         } else {
 474                                 header( 'Location: '.$this->mRedirect );
 475                         }
 476                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 477                         wfProfileOut( $fname );
 478                         return;
 479                 }
 480                 elseif ( $this->mStatusCode )
 481                 {
 482                         $statusMessage = array(
 483                                 100 => 'Continue',
 484                                 101 => 'Switching Protocols',
 485                                 102 => 'Processing',
 486                                 200 => 'OK',
 487                                 201 => 'Created',
 488                                 202 => 'Accepted',
 489                                 203 => 'Non-Authoritative Information',
 490                                 204 => 'No Content',
 491                                 205 => 'Reset Content',
 492                                 206 => 'Partial Content',
 493                                 207 => 'Multi-Status',
 494                                 300 => 'Multiple Choices',
 495                                 301 => 'Moved Permanently',
 496                                 302 => 'Found',
 497                                 303 => 'See Other',
 498                                 304 => 'Not Modified',
 499                                 305 => 'Use Proxy',
 500                                 307 => 'Temporary Redirect',
 501                                 400 => 'Bad Request',
 502                                 401 => 'Unauthorized',
 503                                 402 => 'Payment Required',
 504                                 403 => 'Forbidden',
 505                                 404 => 'Not Found',
 506                                 405 => 'Method Not Allowed',
 507                                 406 => 'Not Acceptable',
 508                                 407 => 'Proxy Authentication Required',
 509                                 408 => 'Request Timeout',
 510                                 409 => 'Conflict',
 511                                 410 => 'Gone',
 512                                 411 => 'Length Required',
 513                                 412 => 'Precondition Failed',
 514                                 413 => 'Request Entity Too Large',
 515                                 414 => 'Request-URI Too Large',
 516                                 415 => 'Unsupported Media Type',
 517                                 416 => 'Request Range Not Satisfiable',
 518                                 417 => 'Expectation Failed',
 519                                 422 => 'Unprocessable Entity',
 520                                 423 => 'Locked',
 521                                 424 => 'Failed Dependency',
 522                                 500 => 'Internal Server Error',
 523                                 501 => 'Not Implemented',
 524                                 502 => 'Bad Gateway',
 525                                 503 => 'Service Unavailable',
 526                                 504 => 'Gateway Timeout',
 527                                 505 => 'HTTP Version Not Supported',
 528                                 507 => 'Insufficient Storage'
 529                         );
 530
 531                         if ( $statusMessage[$this->mStatusCode] )
 532                                 header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 533                 }
 534
 535                 # Buffer output; final headers may depend on later processing
 536                 ob_start();
 537
 538                 # Disable temporary placeholders, so that the skin produces HTML
 539                 $sk->postParseLinkColour( false );
 540
 541                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 542                 header( 'Content-language: '.$wgContLanguageCode );
 543
 544                 if ($this->mArticleBodyOnly) {
 545                         $this->out($this->mBodytext);
 546                 } else {
 547                         wfProfileIn( 'Output-skin' );
 548                         $sk->outputPage( $this );
 549                         wfProfileOut( 'Output-skin' );
 550                 }
 551
 552                 $this->sendCacheControl();
 553                 ob_end_flush();
 554                 wfProfileOut( $fname );
 555         }
 556
 557         function out( $ins ) {
 558                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 559                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 560                         $outs = $ins;
 561                 } else {
 562                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 563                         if ( false === $outs ) { $outs = $ins; }
 564                 }
 565                 print $outs;
 566         }
 567
 568         function setEncodings() {
 569                 global $wgInputEncoding, $wgOutputEncoding;
 570                 global $wgUser, $wgContLang;
 571
 572                 $wgInputEncoding = strtolower( $wgInputEncoding );
 573
 574                 if( $wgUser->getOption( 'altencoding' ) ) {
 575                         $wgContLang->setAltEncoding();
 576                         return;
 577                 }
 578
 579                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 580                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 581                         return;
 582                 }
 583                 $wgOutputEncoding = $wgInputEncoding;
 584         }
 585
 586         /**
 587          * Returns a HTML comment with the elapsed time since request.
 588          * This method has no side effects.
 589          * Use wfReportTime() instead.
 590          * @return string
 591          * @deprecated
 592          */
 593         function reportTime() {
 594                 $time = wfReportTime();
 595                 return $time;
 596         }
 597
 598         /**
 599          * Produce a "user is blocked" page
 600          */
 601         function blockedPage() {
 602                 global $wgUser, $wgContLang;
 603
 604                 $this->setPageTitle( wfMsg( 'blockedtitle' ) );
 605                 $this->setRobotpolicy( 'noindex,nofollow' );
 606                 $this->setArticleRelated( false );
 607
 608                 $id = $wgUser->blockedBy();
 609                 $reason = $wgUser->blockedFor();
 610                 $ip = wfGetIP();
 611
 612                 if ( is_numeric( $id ) ) {
 613                         $name = User::whoIs( $id );
 614                 } else {
 615                         $name = $id;
 616                 }
 617                 $link = '[[' . $wgContLang->getNsText( NS_USER ) . ":{$name}|{$name}]]";
 618
 619                 $this->addWikiText( wfMsg( 'blockedtext', $link, $reason, $ip, $name ) );
 620                 $this->returnToMain( false );
 621         }
 622
 623         /**
 624          * Note: these arguments are keys into wfMsg(), not text!
 625          */
 626         function errorpage( $title, $msg ) {
 627                 global $wgTitle;
 628
 629                 $this->mDebugtext .= 'Original title: ' .
 630                   $wgTitle->getPrefixedText() . "\n";
 631                 $this->setPageTitle( wfMsg( $title ) );
 632                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 633                 $this->setRobotpolicy( 'noindex,nofollow' );
 634                 $this->setArticleRelated( false );
 635                 $this->enableClientCache( false );
 636                 $this->mRedirect = '';
 637
 638                 $this->mBodytext = '';
 639                 $this->addWikiText( wfMsg( $msg ) );
 640                 $this->returnToMain( false );
 641
 642                 $this->output();
 643                 wfErrorExit();
 644         }
 645
 646         /**
 647          * Display an error page indicating that a given version of MediaWiki is
 648          * required to use it
 649          *
 650          * @param mixed $version The version of MediaWiki needed to use the page
 651          */
 652         function versionRequired( $version ) {
 653                 global $wgUser;
 654
 655                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 656                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 657                 $this->setRobotpolicy( 'noindex,nofollow' );
 658                 $this->setArticleRelated( false );
 659                 $this->mBodytext = '';
 660
 661                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 662                 $this->returnToMain();
 663         }
 664
 665         /**
 666          * Display an error page noting that a given permission bit is required.
 667          * This should generally replace the sysopRequired, developerRequired etc.
 668          * @param string $permission key required
 669          */
 670         function permissionRequired( $permission ) {
 671                 global $wgUser;
 672
 673                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 674                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 675                 $this->setRobotpolicy( 'noindex,nofollow' );
 676                 $this->setArticleRelated( false );
 677                 $this->mBodytext = '';
 678
 679                 $sk = $wgUser->getSkin();
 680                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ) );
 681                 $this->addHTML( wfMsgHtml( 'badaccesstext', $ap, $permission ) );
 682                 $this->returnToMain();
 683         }
 684
 685         /**
 686          * @deprecated
 687          */
 688         function sysopRequired() {
 689                 global $wgUser;
 690
 691                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 692                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 693                 $this->setRobotpolicy( 'noindex,nofollow' );
 694                 $this->setArticleRelated( false );
 695                 $this->mBodytext = '';
 696
 697                 $sk = $wgUser->getSkin();
 698                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 699                 $this->addHTML( wfMsgHtml( 'sysoptext', $ap ) );
 700                 $this->returnToMain();
 701         }
 702
 703         /**
 704          * @deprecated
 705          */
 706         function developerRequired() {
 707                 global $wgUser;
 708
 709                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 710                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 711                 $this->setRobotpolicy( 'noindex,nofollow' );
 712                 $this->setArticleRelated( false );
 713                 $this->mBodytext = '';
 714
 715                 $sk = $wgUser->getSkin();
 716                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 717                 $this->addHTML( wfMsgHtml( 'developertext', $ap ) );
 718                 $this->returnToMain();
 719         }
 720
 721         function loginToUse() {
 722                 global $wgUser, $wgTitle, $wgContLang;
 723
 724                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 725                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 726                 $this->setRobotpolicy( 'noindex,nofollow' );
 727                 $this->setArticleFlag( false );
 728                 $this->mBodytext = '';
 729                 $loginpage = Title::makeTitle(NS_SPECIAL, 'Userlogin');
 730                 $sk = $wgUser->getSkin();
 731                 $loginlink = $sk->makeKnownLinkObj($loginpage, wfMsg('loginreqlink'),
 732                         'returnto=' . htmlspecialchars($wgTitle->getPrefixedDBkey()));
 733                 $this->addHTML( wfMsgHtml( 'loginreqpagetext', $loginlink ) );
 734
 735                 # We put a comment in the .html file so a Sysop can diagnose the page the
 736                 # user can't see.
 737                 $this->addHTML( "\n<!--" .
 738                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 739                                                 ':' .
 740                                                 $wgTitle->getDBkey() . '-->' );
 741                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 742         }
 743
 744         function databaseError( $fname, $sql, $error, $errno ) {
 745                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 746
 747                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 748                 $this->setRobotpolicy( 'noindex,nofollow' );
 749                 $this->setArticleRelated( false );
 750                 $this->enableClientCache( false );
 751                 $this->mRedirect = '';
 752
 753                 if( !$wgShowSQLErrors ) {
 754                         $sql = wfMsg( 'sqlhidden' );
 755                 }
 756
 757                 if ( $wgCommandLineMode ) {
 758                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 759                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 760                 } else {
 761                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 762                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 763                 }
 764
 765                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 766                         print $msg."\n";
 767                         wfErrorExit();
 768                 }
 769                 $this->mBodytext = $msg;
 770                 $this->output();
 771                 wfErrorExit();
 772         }
 773
 774         function readOnlyPage( $source = null, $protected = false ) {
 775                 global $wgUser, $wgReadOnlyFile, $wgReadOnly;
 776
 777                 $this->setRobotpolicy( 'noindex,nofollow' );
 778                 $this->setArticleRelated( false );
 779
 780                 if( $protected ) {
 781                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 782                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 783                 } else {
 784                         $this->setPageTitle( wfMsg( 'readonly' ) );
 785                         if ( $wgReadOnly ) {
 786                                 $reason = $wgReadOnly;
 787                         } else {
 788                                 $reason = file_get_contents( $wgReadOnlyFile );
 789                         }
 790                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 791                 }
 792
 793                 if( is_string( $source ) ) {
 794                         if( strcmp( $source, '' ) == 0 ) {
 795                                 global $wgTitle ;
 796                                 if ( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
 797                                         $source = wfMsgWeirdKey ( $wgTitle->getText() ) ;
 798                                 } else {
 799                                         $source = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 800                                 }
 801                         }
 802                         $rows = $wgUser->getOption( 'rows' );
 803                         $cols = $wgUser->getOption( 'cols' );
 804                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 805                                 htmlspecialchars( $source ) . "\n</textarea>";
 806                         $this->addHTML( $text );
 807                 }
 808
 809                 $this->returnToMain( false );
 810         }
 811
 812         function fatalError( $message ) {
 813                 $this->setPageTitle( wfMsg( "internalerror" ) );
 814                 $this->setRobotpolicy( "noindex,nofollow" );
 815                 $this->setArticleRelated( false );
 816                 $this->enableClientCache( false );
 817                 $this->mRedirect = '';
 818
 819                 $this->mBodytext = $message;
 820                 $this->output();
 821                 wfErrorExit();
 822         }
 823
 824         function unexpectedValueError( $name, $val ) {
 825                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 826         }
 827
 828         function fileCopyError( $old, $new ) {
 829                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 830         }
 831
 832         function fileRenameError( $old, $new ) {
 833                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 834         }
 835
 836         function fileDeleteError( $name ) {
 837                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 838         }
 839
 840         function fileNotFoundError( $name ) {
 841                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 842         }
 843
 844         /**
 845          * return from error messages or notes
 846          * @param $auto automatically redirect the user after 10 seconds
 847          * @param $returnto page title to return to. Default is Main Page.
 848          */
 849         function returnToMain( $auto = true, $returnto = NULL ) {
 850                 global $wgUser, $wgOut, $wgRequest;
 851
 852                 if ( $returnto == NULL ) {
 853                         $returnto = $wgRequest->getText( 'returnto' );
 854                 }
 855                 $returnto = htmlspecialchars( $returnto );
 856
 857                 $sk = $wgUser->getSkin();
 858                 if ( '' == $returnto ) {
 859                         $returnto = wfMsgForContent( 'mainpage' );
 860                 }
 861                 $link = $sk->makeKnownLink( $returnto, '' );
 862
 863                 $r = wfMsg( 'returnto', $link );
 864                 if ( $auto ) {
 865                         $titleObj = Title::newFromText( $returnto );
 866                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 867                 }
 868                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 869         }
 870
 871         /**
 872          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
 873          * and uses the first 10 of them for META keywords
 874          */
 875         function addKeywords( &$parserOutput ) {
 876                 global $wgTitle;
 877                 $this->addKeyword( $wgTitle->getPrefixedText() );
 878                 $count = 1;
 879                 $links2d =& $parserOutput->getLinks();
 880                 foreach ( $links2d as $ns => $dbkeys ) {
 881                         foreach( $dbkeys as $dbkey => $id ) {
 882                                 $this->addKeyword( $dbkey );
 883                                 if ( ++$count > 10 ) {
 884                                         break 2;
 885                                 }
 886                         }
 887                 }
 888         }
 889
 890         /**
 891          * @access private
 892          * @return string
 893          */
 894         function headElement() {
 895                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 896                 global $wgUser, $wgContLang, $wgRequest, $wgUseTrackbacks, $wgTitle;
 897
 898                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 899                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 900                 } else {
 901                         $ret = '';
 902                 }
 903
 904                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 905
 906                 if ( '' == $this->getHTMLTitle() ) {
 907                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
 908                 }
 909
 910                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 911                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 912                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
 913                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 914
 915                 $ret .= $this->getHeadLinks();
 916                 global $wgStylePath;
 917                 if( $this->isPrintable() ) {
 918                         $media = '';
 919                 } else {
 920                         $media = "media='print'";
 921                 }
 922                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 923                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 924
 925                 $sk = $wgUser->getSkin();
 926                 $ret .= $sk->getHeadScripts();
 927                 $ret .= $this->mScripts;
 928                 $ret .= $sk->getUserStyles();
 929
 930                 if ($wgUseTrackbacks && $this->isArticleRelated())
 931                         $ret .= $wgTitle->trackbackRDF();
 932
 933                 $ret .= "</head>\n";
 934                 return $ret;
 935         }
 936
 937         function getHeadLinks() {
 938                 global $wgRequest, $wgStylePath;
 939                 $ret = '';
 940                 foreach ( $this->mMetatags as $tag ) {
 941                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 942                                 $a = 'http-equiv';
 943                                 $tag[0] = substr( $tag[0], 5 );
 944                         } else {
 945                                 $a = 'name';
 946                         }
 947                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 948                 }
 949
 950                 $p = $this->mRobotpolicy;
 951                 if( $p !== '' && $p != 'index,follow' ) {
 952                         // http://www.robotstxt.org/wc/meta-user.html
 953                         // Only show if it's different from the default robots policy
 954                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 955                 }
 956
 957                 if ( count( $this->mKeywords ) > 0 ) {
 958                         $strip = array(
 959                                 "/<.*?>/" => '',
 960                                 "/_/" => ' '
 961                         );
 962                         $ret .= "<meta name=\"keywords\" content=\"" .
 963                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 964                 }
 965                 foreach ( $this->mLinktags as $tag ) {
 966                         $ret .= '<link';
 967                         foreach( $tag as $attr => $val ) {
 968                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 969                         }
 970                         $ret .= " />\n";
 971                 }
 972                 if( $this->isSyndicated() ) {
 973                         # FIXME: centralize the mime-type and name information in Feed.php
 974                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 975                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 976                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 977                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 0.3' href='$link' />\n";
 978                 }
 979
 980                 return $ret;
 981         }
 982
 983         /**
 984          * Turn off regular page output and return an error reponse
 985          * for when rate limiting has triggered.
 986          * @todo i18n
 987          * @access public
 988          */
 989         function rateLimited() {
 990                 global $wgOut;
 991                 $wgOut->disable();
 992                 wfHttpError( 500, 'Internal Server Error',
 993                         'Sorry, the server has encountered an internal error. ' .
 994                         'Please wait a moment and hit "refresh" to submit the request again.' );
 995         }
 996
 997 }
 998 ?>