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, $mMetatags, $mKeywords;
  21         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  22         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  23         var $mSubtitle, $mRedirect, $mStatusCode;
  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->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                 $this->mRevisionId = null;
  59         }
  60
  61         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
  62         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  63         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  64
  65         # To add an http-equiv meta tag, precede the name with "http:"
  66         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  67         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  68         function addScript( $script ) { $this->mScripts .= $script; }
  69         function getScript() { return $this->mScripts; }
  70
  71         function setETag($tag) { $this->mETag = $tag; }
  72         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
  73         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
  74
  75         function addLink( $linkarr ) {
  76                 # $linkarr should be an associative array of attributes. We'll escape on output.
  77                 array_push( $this->mLinktags, $linkarr );
  78         }
  79
  80         function addMetadataLink( $linkarr ) {
  81                 # note: buggy CC software only reads first "meta" link
  82                 static $haveMeta = false;
  83                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  84                 $this->addLink( $linkarr );
  85                 $haveMeta = true;
  86         }
  87
  88         /**
  89          * checkLastModified tells the client to use the client-cached page if
  90          * possible. If sucessful, the OutputPage is disabled so that
  91          * any future call to OutputPage->output() have no effect. The method
  92          * returns true iff cache-ok headers was sent.
  93          */
  94         function checkLastModified ( $timestamp ) {
  95                 global $wgCachePages, $wgUser;
  96                 if ( !$timestamp || $timestamp == '19700101000000' ) {
  97                         wfDebug( "CACHE DISABLED, NO TIMESTAMP\n" );
  98                         return;
  99                 }
 100                 if( !$wgCachePages ) {
 101                         wfDebug( "CACHE DISABLED\n", false );
 102                         return;
 103                 }
 104                 if( $wgUser->getOption( 'nocache' ) ) {
 105                         wfDebug( "USER DISABLED CACHE\n", false );
 106                         return;
 107                 }
 108
 109                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 110                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
 111
 112                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 113                         # IE sends sizes after the date like this:
 114                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 115                         # this breaks strtotime().
 116                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 117                         $modsinceTime = strtotime( $modsince );
 118                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 119                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 120                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 121                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) ) {
 122                                 # Make sure you're in a place you can leave when you call us!
 123                                 header( "HTTP/1.0 304 Not Modified" );
 124                                 $this->mLastModified = $lastmod;
 125                                 $this->sendCacheControl();
 126                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 127                                 $this->disable();
 128                                 @ob_end_clean(); // Don't output compressed blob
 129                                 return true;
 130                         } else {
 131                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 132                                 $this->mLastModified = $lastmod;
 133                         }
 134                 } else {
 135                         wfDebug( "client did not send If-Modified-Since header\n", false );
 136                         $this->mLastModified = $lastmod;
 137                 }
 138         }
 139
 140         function getPageTitleActionText () {
 141                 global $action;
 142                 switch($action) {
 143                         case 'edit':
 144                         case 'delete':
 145                         case 'protect':
 146                         case 'unprotect':
 147                         case 'watch':
 148                         case 'unwatch':
 149                                 // Display title is already customized
 150                                 return '';
 151                         case 'history':
 152                                 return wfMsg('history_short');
 153                         case 'submit':
 154                                 // FIXME: bug 2735; not correct for special pages etc
 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
 176                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 177         }
 178         function getHTMLTitle() { return $this->mHTMLtitle; }
 179         function getPageTitle() { return $this->mPagetitle; }
 180         function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 181         function getSubtitle() { return $this->mSubtitle; }
 182         function isArticle() { return $this->mIsarticle; }
 183         function setPrintable() { $this->mPrintable = true; }
 184         function isPrintable() { return $this->mPrintable; }
 185         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 186         function isSyndicated() { return $this->mShowFeedLinks; }
 187         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 188         function getOnloadHandler() { return $this->mOnloadHandler; }
 189         function disable() { $this->mDoNothing = true; }
 190
 191         function setArticleRelated( $v ) {
 192                 $this->mIsArticleRelated = $v;
 193                 if ( !$v ) {
 194                         $this->mIsarticle = false;
 195                 }
 196         }
 197         function setArticleFlag( $v ) {
 198                 $this->mIsarticle = $v;
 199                 if ( $v ) {
 200                         $this->mIsArticleRelated = $v;
 201                 }
 202         }
 203
 204         function isArticleRelated() { return $this->mIsArticleRelated; }
 205
 206         function getLanguageLinks() { return $this->mLanguageLinks; }
 207         function addLanguageLinks($newLinkArray) {
 208                 $this->mLanguageLinks += $newLinkArray;
 209         }
 210         function setLanguageLinks($newLinkArray) {
 211                 $this->mLanguageLinks = $newLinkArray;
 212         }
 213
 214         function getCategoryLinks() {
 215                 return $this->mCategoryLinks;
 216         }
 217
 218         /**
 219          * Add an array of categories, with names in the keys
 220          */
 221         function addCategoryLinks($categories) {
 222                 global $wgUser, $wgLinkCache, $wgContLang;
 223
 224                 # Add the links to the link cache in a batch
 225                 $arr = array( NS_CATEGORY => $categories );
 226                 $lb = new LinkBatch;
 227                 $lb->setArray( $arr );
 228                 $lb->execute( $wgLinkCache );
 229
 230                 $sk =& $wgUser->getSkin();
 231                 foreach ( $categories as $category => $arbitrary ) {
 232                         $title = Title::makeTitleSafe( NS_CATEGORY, $category );
 233                         $text = $wgContLang->convertHtml( $title->getText() );
 234                         $this->mCategoryLinks[] = $sk->makeLinkObj( $title, $text );
 235                 }
 236         }
 237
 238         function setCategoryLinks($categories) {
 239                 $this->mCategoryLinks = array();
 240                 $this->addCategoryLinks($categories);
 241         }
 242
 243         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 244         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 245
 246         function addHTML( $text ) { $this->mBodytext .= $text; }
 247         function clearHTML() { $this->mBodytext = ''; }
 248         function getHTML() { return $this->mBodytext; }
 249         function debug( $text ) { $this->mDebugtext .= $text; }
 250
 251         /* @deprecated */
 252         function setParserOptions( $options ) {
 253                 return $this->ParserOptions( $options );
 254         }
 255
 256         function ParserOptions( $options = null ) {
 257                 return wfSetVar( $this->mParserOptions, $options );
 258         }
 259
 260         /**
 261          * Set the revision ID which will be seen by the wiki text parser
 262          * for things such as embedded {{REVISIONID}} variable use.
 263          * @param mixed $revid an integer, or NULL
 264          * @return mixed previous value
 265          */
 266         function setRevisionId( $revid ) {
 267                 $val = is_null( $revid ) ? null : intval( $revid );
 268                 return wfSetVar( $this->mRevisionId, $val );
 269         }
 270
 271         /**
 272          * Convert wikitext to HTML and add it to the buffer
 273          * Default assumes that the current page title will
 274          * be used.
 275          */
 276         function addWikiText( $text, $linestart = true ) {
 277                 global $wgTitle;
 278                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 279         }
 280
 281         function addWikiTextWithTitle($text, &$title, $linestart = true) {
 282                 $this->addWikiTextTitle($text, $title, $linestart);
 283         }
 284
 285         function addWikiTextTitle($text, &$title, $linestart) {
 286                 global $wgParser;
 287                 $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions,
 288                         $linestart, true, $this->mRevisionId );
 289                 $this->addParserOutput( $parserOutput );
 290         }
 291
 292         function addParserOutputNoText( &$parserOutput ) {
 293                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 294                 $this->addCategoryLinks( $parserOutput->getCategories() );
 295                 $this->addKeywords( $parserOutput );
 296                 if ( $parserOutput->getCacheTime() == -1 ) {
 297                         $this->enableClientCache( false );
 298                 }
 299         }
 300
 301         function addParserOutput( &$parserOutput ) {
 302                 $this->addParserOutputNoText( $parserOutput );
 303                 $this->addHTML( $parserOutput->getText() );
 304         }
 305
 306         /**
 307          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 308          * Saves the text into the parser cache if possible
 309          */
 310         function addPrimaryWikiText( $text, $article, $cache = true ) {
 311                 global $wgParser, $wgParserCache, $wgUser;
 312
 313                 $parserOutput = $wgParser->parse( $text, $article->mTitle,
 314                         $this->mParserOptions, true, true, $this->mRevisionId );
 315
 316                 if ( $article && $parserOutput->getCacheTime() != -1 ) {
 317                         $wgParserCache->save( $parserOutput, $article, $wgUser );
 318                 }
 319
 320                 $this->addParserOutput( $parserOutput );
 321         }
 322
 323         /**
 324          * Add the output of a QuickTemplate to the output buffer
 325          * @param QuickTemplate $template
 326          */
 327         function addTemplate( &$template ) {
 328                 ob_start();
 329                 $template->execute();
 330                 $this->addHTML( ob_get_contents() );
 331                 ob_end_clean();
 332         }
 333
 334         /**
 335          * Parse wikitext and return the HTML. This is for special pages that add the text later
 336          */
 337         function parse( $text, $linestart = true ) {
 338                 global $wgParser, $wgTitle;
 339                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions,
 340                         $linestart, true, $this->mRevisionId );
 341                 return $parserOutput->getText();
 342         }
 343
 344         /**
 345          * @param $article
 346          * @param $user
 347          *
 348          * @return bool
 349          */
 350         function tryParserCache( $article, $user ) {
 351                 global $wgParserCache;
 352                 $parserOutput = $wgParserCache->get( $article, $user );
 353                 if ( $parserOutput !== false ) {
 354                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 355                         $this->addCategoryLinks( $parserOutput->getCategories() );
 356                         $this->addKeywords( $parserOutput );
 357                         $this->addHTML( $parserOutput->getText() );
 358                         $t = $parserOutput->getTitleText();
 359                         if( !empty( $t ) ) {
 360                                 $this->setPageTitle( $t );
 361                         }
 362                         return true;
 363                 } else {
 364                         return false;
 365                 }
 366         }
 367
 368         /**
 369          * Set the maximum cache time on the Squid in seconds
 370          * @param $maxage
 371          */
 372         function setSquidMaxage( $maxage ) {
 373                 $this->mSquidMaxage = $maxage;
 374         }
 375
 376         /**
 377          * Use enableClientCache(false) to force it to send nocache headers
 378          * @param $state
 379          */
 380         function enableClientCache( $state ) {
 381                 return wfSetVar( $this->mEnableClientCache, $state );
 382         }
 383
 384         function uncacheableBecauseRequestvars() {
 385                 global $wgRequest;
 386                 return  $wgRequest->getText('useskin', false) === false
 387                         && $wgRequest->getText('uselang', false) === false;
 388         }
 389
 390         function sendCacheControl() {
 391                 global $wgUseSquid, $wgUseESI;
 392
 393                 if ($this->mETag)
 394                         header("ETag: $this->mETag");
 395
 396                 # don't serve compressed data to clients who can't handle it
 397                 # maintain different caches for logged-in users and non-logged in ones
 398                 header( 'Vary: Accept-Encoding, Cookie' );
 399                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 400                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 401                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 402                         {
 403                                 if ( $wgUseESI ) {
 404                                         # We'll purge the proxy cache explicitly, but require end user agents
 405                                         # to revalidate against the proxy on each visit.
 406                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 407                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 408                                         # start with a shorter timeout for initial testing
 409                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 410                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 411                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 412                                 } else {
 413                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 414                                         # to revalidate against the proxy on each visit.
 415                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 416                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 417                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 418                                         # start with a shorter timeout for initial testing
 419                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 420                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 421                                 }
 422                         } else {
 423                                 # We do want clients to cache if they can, but they *must* check for updates
 424                                 # on revisiting the page.
 425                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 426                                 header( "Expires: -1" );
 427                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 428                         }
 429                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 430                 } else {
 431                         wfDebug( "** no caching **\n", false );
 432
 433                         # In general, the absence of a last modified header should be enough to prevent
 434                         # the client from using its cache. We send a few other things just to make sure.
 435                         header( 'Expires: -1' );
 436                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 437                         header( 'Pragma: no-cache' );
 438                 }
 439         }
 440
 441         /**
 442          * Finally, all the text has been munged and accumulated into
 443          * the object, let's actually output it:
 444          */
 445         function output() {
 446                 global $wgUser, $wgOutputEncoding;
 447                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType, $wgProfiler;
 448
 449                 if( $this->mDoNothing ){
 450                         return;
 451                 }
 452                 $fname = 'OutputPage::output';
 453                 wfProfileIn( $fname );
 454                 $sk = $wgUser->getSkin();
 455
 456                 if ( '' != $this->mRedirect ) {
 457                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 458                                 # Standards require redirect URLs to be absolute
 459                                 global $wgServer;
 460                                 $this->mRedirect = $wgServer . $this->mRedirect;
 461                         }
 462                         if( $this->mRedirectCode == '301') {
 463                                 if( !$wgDebugRedirects ) {
 464                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 465                                 }
 466                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 467                         }
 468
 469                         $this->sendCacheControl();
 470
 471                         if( $wgDebugRedirects ) {
 472                                 $url = htmlspecialchars( $this->mRedirect );
 473                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 474                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 475                                 print "</body>\n</html>\n";
 476                         } else {
 477                                 header( 'Location: '.$this->mRedirect );
 478                         }
 479                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 480                         wfProfileOut( $fname );
 481                         return;
 482                 }
 483                 elseif ( $this->mStatusCode )
 484                 {
 485                         $statusMessage = array(
 486                                 100 => 'Continue',
 487                                 101 => 'Switching Protocols',
 488                                 102 => 'Processing',
 489                                 200 => 'OK',
 490                                 201 => 'Created',
 491                                 202 => 'Accepted',
 492                                 203 => 'Non-Authoritative Information',
 493                                 204 => 'No Content',
 494                                 205 => 'Reset Content',
 495                                 206 => 'Partial Content',
 496                                 207 => 'Multi-Status',
 497                                 300 => 'Multiple Choices',
 498                                 301 => 'Moved Permanently',
 499                                 302 => 'Found',
 500                                 303 => 'See Other',
 501                                 304 => 'Not Modified',
 502                                 305 => 'Use Proxy',
 503                                 307 => 'Temporary Redirect',
 504                                 400 => 'Bad Request',
 505                                 401 => 'Unauthorized',
 506                                 402 => 'Payment Required',
 507                                 403 => 'Forbidden',
 508                                 404 => 'Not Found',
 509                                 405 => 'Method Not Allowed',
 510                                 406 => 'Not Acceptable',
 511                                 407 => 'Proxy Authentication Required',
 512                                 408 => 'Request Timeout',
 513                                 409 => 'Conflict',
 514                                 410 => 'Gone',
 515                                 411 => 'Length Required',
 516                                 412 => 'Precondition Failed',
 517                                 413 => 'Request Entity Too Large',
 518                                 414 => 'Request-URI Too Large',
 519                                 415 => 'Unsupported Media Type',
 520                                 416 => 'Request Range Not Satisfiable',
 521                                 417 => 'Expectation Failed',
 522                                 422 => 'Unprocessable Entity',
 523                                 423 => 'Locked',
 524                                 424 => 'Failed Dependency',
 525                                 500 => 'Internal Server Error',
 526                                 501 => 'Not Implemented',
 527                                 502 => 'Bad Gateway',
 528                                 503 => 'Service Unavailable',
 529                                 504 => 'Gateway Timeout',
 530                                 505 => 'HTTP Version Not Supported',
 531                                 507 => 'Insufficient Storage'
 532                         );
 533
 534                         if ( $statusMessage[$this->mStatusCode] )
 535                                 header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 536                 }
 537
 538                 # Buffer output; final headers may depend on later processing
 539                 ob_start();
 540
 541                 # Disable temporary placeholders, so that the skin produces HTML
 542                 $sk->postParseLinkColour( false );
 543
 544                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 545                 header( 'Content-language: '.$wgContLanguageCode );
 546
 547                 if ($this->mArticleBodyOnly) {
 548                         $this->out($this->mBodytext);
 549                 } else {
 550                         wfProfileIn( 'Output-skin' );
 551                         $sk->outputPage( $this );
 552                         wfProfileOut( 'Output-skin' );
 553                 }
 554
 555                 $this->sendCacheControl();
 556                 ob_end_flush();
 557                 wfProfileOut( $fname );
 558         }
 559
 560         function out( $ins ) {
 561                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 562                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 563                         $outs = $ins;
 564                 } else {
 565                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 566                         if ( false === $outs ) { $outs = $ins; }
 567                 }
 568                 print $outs;
 569         }
 570
 571         function setEncodings() {
 572                 global $wgInputEncoding, $wgOutputEncoding;
 573                 global $wgUser, $wgContLang;
 574
 575                 $wgInputEncoding = strtolower( $wgInputEncoding );
 576
 577                 if( $wgUser->getOption( 'altencoding' ) ) {
 578                         $wgContLang->setAltEncoding();
 579                         return;
 580                 }
 581
 582                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 583                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 584                         return;
 585                 }
 586                 $wgOutputEncoding = $wgInputEncoding;
 587         }
 588
 589         /**
 590          * Returns a HTML comment with the elapsed time since request.
 591          * This method has no side effects.
 592          * Use wfReportTime() instead.
 593          * @return string
 594          * @deprecated
 595          */
 596         function reportTime() {
 597                 $time = wfReportTime();
 598                 return $time;
 599         }
 600
 601         /**
 602          * Note: these arguments are keys into wfMsg(), not text!
 603          */
 604         function errorpage( $title, $msg ) {
 605                 global $wgTitle;
 606
 607                 $this->mDebugtext .= 'Original title: ' .
 608                   $wgTitle->getPrefixedText() . "\n";
 609                 $this->setPageTitle( wfMsg( $title ) );
 610                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 611                 $this->setRobotpolicy( 'noindex,nofollow' );
 612                 $this->setArticleRelated( false );
 613                 $this->enableClientCache( false );
 614                 $this->mRedirect = '';
 615
 616                 $this->mBodytext = '';
 617                 $this->addWikiText( wfMsg( $msg ) );
 618                 $this->returnToMain( false );
 619
 620                 $this->output();
 621                 wfErrorExit();
 622         }
 623
 624         /**
 625          * Display an error page indicating that a given version of MediaWiki is
 626          * required to use it
 627          *
 628          * @param mixed $version The version of MediaWiki needed to use the page
 629          */
 630         function versionRequired( $version ) {
 631                 global $wgUser;
 632
 633                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 634                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 635                 $this->setRobotpolicy( 'noindex,nofollow' );
 636                 $this->setArticleRelated( false );
 637                 $this->mBodytext = '';
 638
 639                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 640                 $this->returnToMain();
 641         }
 642
 643         /**
 644          * Display an error page noting that a given permission bit is required.
 645          * This should generally replace the sysopRequired, developerRequired etc.
 646          * @param string $permission key required
 647          */
 648         function permissionRequired( $permission ) {
 649                 global $wgUser;
 650
 651                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 652                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 653                 $this->setRobotpolicy( 'noindex,nofollow' );
 654                 $this->setArticleRelated( false );
 655                 $this->mBodytext = '';
 656
 657                 $sk = $wgUser->getSkin();
 658                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ) );
 659                 $this->addHTML( wfMsgHtml( 'badaccesstext', $ap, $permission ) );
 660                 $this->returnToMain();
 661         }
 662
 663         /**
 664          * @deprecated
 665          */
 666         function sysopRequired() {
 667                 global $wgUser;
 668
 669                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 670                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 671                 $this->setRobotpolicy( 'noindex,nofollow' );
 672                 $this->setArticleRelated( false );
 673                 $this->mBodytext = '';
 674
 675                 $sk = $wgUser->getSkin();
 676                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 677                 $this->addHTML( wfMsgHtml( 'sysoptext', $ap ) );
 678                 $this->returnToMain();
 679         }
 680
 681         /**
 682          * @deprecated
 683          */
 684         function developerRequired() {
 685                 global $wgUser;
 686
 687                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 688                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 689                 $this->setRobotpolicy( 'noindex,nofollow' );
 690                 $this->setArticleRelated( false );
 691                 $this->mBodytext = '';
 692
 693                 $sk = $wgUser->getSkin();
 694                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 695                 $this->addHTML( wfMsgHtml( 'developertext', $ap ) );
 696                 $this->returnToMain();
 697         }
 698
 699         function loginToUse() {
 700                 global $wgUser, $wgTitle, $wgContLang;
 701
 702                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 703                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 704                 $this->setRobotpolicy( 'noindex,nofollow' );
 705                 $this->setArticleFlag( false );
 706                 $this->mBodytext = '';
 707                 $loginpage = Title::makeTitle(NS_SPECIAL, 'Userlogin');
 708                 $sk = $wgUser->getSkin();
 709                 $loginlink = $sk->makeKnownLinkObj($loginpage, wfMsg('loginreqlink'),
 710                         'returnto=' . htmlspecialchars($wgTitle->getPrefixedDBkey()));
 711                 $this->addHTML( wfMsgHtml( 'loginreqpagetext', $loginlink ) );
 712
 713                 # We put a comment in the .html file so a Sysop can diagnose the page the
 714                 # user can't see.
 715                 $this->addHTML( "\n<!--" .
 716                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 717                                                 ':' .
 718                                                 $wgTitle->getDBkey() . '-->' );
 719                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 720         }
 721
 722         function databaseError( $fname, $sql, $error, $errno ) {
 723                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 724
 725                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 726                 $this->setRobotpolicy( 'noindex,nofollow' );
 727                 $this->setArticleRelated( false );
 728                 $this->enableClientCache( false );
 729                 $this->mRedirect = '';
 730
 731                 if( !$wgShowSQLErrors ) {
 732                         $sql = wfMsg( 'sqlhidden' );
 733                 }
 734
 735                 if ( $wgCommandLineMode ) {
 736                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 737                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 738                 } else {
 739                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 740                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 741                 }
 742
 743                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 744                         print $msg."\n";
 745                         wfErrorExit();
 746                 }
 747                 $this->mBodytext = $msg;
 748                 $this->output();
 749                 wfErrorExit();
 750         }
 751
 752         function readOnlyPage( $source = null, $protected = false ) {
 753                 global $wgUser, $wgReadOnlyFile, $wgReadOnly;
 754
 755                 $this->setRobotpolicy( 'noindex,nofollow' );
 756                 $this->setArticleRelated( false );
 757
 758                 if( $protected ) {
 759                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 760                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 761                 } else {
 762                         $this->setPageTitle( wfMsg( 'readonly' ) );
 763                         if ( $wgReadOnly ) {
 764                                 $reason = $wgReadOnly;
 765                         } else {
 766                                 $reason = file_get_contents( $wgReadOnlyFile );
 767                         }
 768                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 769                 }
 770
 771                 if( is_string( $source ) ) {
 772                         if( strcmp( $source, '' ) == 0 ) {
 773                                 global $wgTitle ;
 774                                 if ( $wgTitle->getNamespace() == NS_MEDIAWIKI ) {
 775                                         $source = wfMsgWeirdKey ( $wgTitle->getText() ) ;
 776                                 } else {
 777                                         $source = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 778                                 }
 779                         }
 780                         $rows = $wgUser->getOption( 'rows' );
 781                         $cols = $wgUser->getOption( 'cols' );
 782                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 783                                 htmlspecialchars( $source ) . "\n</textarea>";
 784                         $this->addHTML( $text );
 785                 }
 786
 787                 $this->returnToMain( false );
 788         }
 789
 790         function fatalError( $message ) {
 791                 $this->setPageTitle( wfMsg( "internalerror" ) );
 792                 $this->setRobotpolicy( "noindex,nofollow" );
 793                 $this->setArticleRelated( false );
 794                 $this->enableClientCache( false );
 795                 $this->mRedirect = '';
 796
 797                 $this->mBodytext = $message;
 798                 $this->output();
 799                 wfErrorExit();
 800         }
 801
 802         function unexpectedValueError( $name, $val ) {
 803                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 804         }
 805
 806         function fileCopyError( $old, $new ) {
 807                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 808         }
 809
 810         function fileRenameError( $old, $new ) {
 811                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 812         }
 813
 814         function fileDeleteError( $name ) {
 815                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 816         }
 817
 818         function fileNotFoundError( $name ) {
 819                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 820         }
 821
 822         /**
 823          * return from error messages or notes
 824          * @param $auto automatically redirect the user after 10 seconds
 825          * @param $returnto page title to return to. Default is Main Page.
 826          */
 827         function returnToMain( $auto = true, $returnto = NULL ) {
 828                 global $wgUser, $wgOut, $wgRequest;
 829
 830                 if ( $returnto == NULL ) {
 831                         $returnto = $wgRequest->getText( 'returnto' );
 832                 }
 833                 $returnto = htmlspecialchars( $returnto );
 834
 835                 $sk = $wgUser->getSkin();
 836                 if ( '' == $returnto ) {
 837                         $returnto = wfMsgForContent( 'mainpage' );
 838                 }
 839                 $link = $sk->makeKnownLink( $returnto, '' );
 840
 841                 $r = wfMsg( 'returnto', $link );
 842                 if ( $auto ) {
 843                         $titleObj = Title::newFromText( $returnto );
 844                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 845                 }
 846                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 847         }
 848
 849         /**
 850          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
 851          * and uses the first 10 of them for META keywords
 852          */
 853         function addKeywords( &$parserOutput ) {
 854                 global $wgTitle;
 855                 $this->addKeyword( $wgTitle->getPrefixedText() );
 856                 $count = 1;
 857                 $links2d =& $parserOutput->getLinks();
 858                 foreach ( $links2d as $ns => $dbkeys ) {
 859                         foreach( $dbkeys as $dbkey => $id ) {
 860                                 $this->addKeyword( $dbkey );
 861                                 if ( ++$count > 10 ) {
 862                                         break 2;
 863                                 }
 864                         }
 865                 }
 866         }
 867
 868         /**
 869          * @private
 870          * @return string
 871          */
 872         function headElement() {
 873                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 874                 global $wgUser, $wgContLang, $wgRequest, $wgUseTrackbacks, $wgTitle;
 875
 876                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 877                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 878                 } else {
 879                         $ret = '';
 880                 }
 881
 882                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 883
 884                 if ( '' == $this->getHTMLTitle() ) {
 885                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
 886                 }
 887
 888                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 889                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 890                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
 891                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 892
 893                 $ret .= $this->getHeadLinks();
 894                 global $wgStylePath;
 895                 if( $this->isPrintable() ) {
 896                         $media = '';
 897                 } else {
 898                         $media = "media='print'";
 899                 }
 900                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 901                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 902
 903                 $sk = $wgUser->getSkin();
 904                 $ret .= $sk->getHeadScripts();
 905                 $ret .= $this->mScripts;
 906                 $ret .= $sk->getUserStyles();
 907
 908                 if ($wgUseTrackbacks && $this->isArticleRelated())
 909                         $ret .= $wgTitle->trackbackRDF();
 910
 911                 $ret .= "</head>\n";
 912                 return $ret;
 913         }
 914
 915         function getHeadLinks() {
 916                 global $wgRequest, $wgStylePath;
 917                 $ret = '';
 918                 foreach ( $this->mMetatags as $tag ) {
 919                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 920                                 $a = 'http-equiv';
 921                                 $tag[0] = substr( $tag[0], 5 );
 922                         } else {
 923                                 $a = 'name';
 924                         }
 925                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 926                 }
 927
 928                 $p = $this->mRobotpolicy;
 929                 if( $p !== '' && $p != 'index,follow' ) {
 930                         // http://www.robotstxt.org/wc/meta-user.html
 931                         // Only show if it's different from the default robots policy
 932                         $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 933                 }
 934
 935                 if ( count( $this->mKeywords ) > 0 ) {
 936                         $strip = array(
 937                                 "/<.*?>/" => '',
 938                                 "/_/" => ' '
 939                         );
 940                         $ret .= "<meta name=\"keywords\" content=\"" .
 941                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 942                 }
 943                 foreach ( $this->mLinktags as $tag ) {
 944                         $ret .= '<link';
 945                         foreach( $tag as $attr => $val ) {
 946                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 947                         }
 948                         $ret .= " />\n";
 949                 }
 950                 if( $this->isSyndicated() ) {
 951                         # FIXME: centralize the mime-type and name information in Feed.php
 952                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 953                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 954                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 955                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 0.3' href='$link' />\n";
 956                 }
 957
 958                 return $ret;
 959         }
 960
 961         /**
 962          * Turn off regular page output and return an error reponse
 963          * for when rate limiting has triggered.
 964          * @todo i18n
 965          * @access public
 966          */
 967         function rateLimited() {
 968                 global $wgOut;
 969                 $wgOut->disable();
 970                 wfHttpError( 500, 'Internal Server Error',
 971                         'Sorry, the server has encountered an internal error. ' .
 972                         'Please wait a moment and hit "refresh" to submit the request again.' );
 973         }
 974
 975 }
 976
 977 } // MediaWiki
 978
 979 ?>