includes/OutputPage.php

   1 <?php
   2 /**
   3  * @package MediaWiki
   4  */
   5
   6 /**
   7  * This is not a valid entry point, perform no further processing unless MEDIAWIKI is defined
   8  */
   9 if( defined( 'MEDIAWIKI' ) ) {
  10
  11 # See design.txt
  12
  13 if($wgUseTeX) require_once( 'Math.php' );
  14
  15 /**
  16  * @todo document
  17  * @package MediaWiki
  18  */
  19 class OutputPage {
  20         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
  21         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  22         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  23         var $mSubtitle, $mRedirect, $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->mCookies = $this->mMetatags =
  43                 $this->mKeywords = $this->mLinktags = array();
  44                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  45                 $this->mRedirect = $this->mLastModified =
  46                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  47                 $this->mOnloadHandler = '';
  48                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  49                 $this->mSuppressQuickbar = $this->mPrintable = false;
  50                 $this->mLanguageLinks = array();
  51                 $this->mCategoryLinks = array() ;
  52                 $this->mDoNothing = false;
  53                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  54                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  55                 $this->mSquidMaxage = 0;
  56                 $this->mScripts = '';
  57                 $this->mETag = false;
  58                 $this->mRevisionId = null;
  59         }
  60
  61         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
  62         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  63         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  64         function setStatusCode( $statusCode ) { $this->mStatusCode = $statusCode; }
  65
  66         # To add an http-equiv meta tag, precede the name with "http:"
  67         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  68         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  69         function addScript( $script ) { $this->mScripts .= $script; }
  70         function getScript() { return $this->mScripts; }
  71
  72         function setETag($tag) { $this->mETag = $tag; }
  73         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
  74         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
  75
  76         function addLink( $linkarr ) {
  77                 # $linkarr should be an associative array of attributes. We'll escape on output.
  78                 array_push( $this->mLinktags, $linkarr );
  79         }
  80
  81         function addMetadataLink( $linkarr ) {
  82                 # note: buggy CC software only reads first "meta" link
  83                 static $haveMeta = false;
  84                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  85                 $this->addLink( $linkarr );
  86                 $haveMeta = true;
  87         }
  88
  89         /**
  90          * checkLastModified tells the client to use the client-cached page if
  91          * possible. If sucessful, the OutputPage is disabled so that
  92          * any future call to OutputPage->output() have no effect. The method
  93          * returns true iff cache-ok headers was sent.
  94          */
  95         function checkLastModified ( $timestamp ) {
  96                 global $wgLang, $wgCachePages, $wgUser;
  97                 if ( !$timestamp || $timestamp == '19700101000000' ) {
  98                         wfDebug( "CACHE DISABLED, NO TIMESTAMP\n" );
  99                         return;
 100                 }
 101                 if( !$wgCachePages ) {
 102                         wfDebug( "CACHE DISABLED\n", false );
 103                         return;
 104                 }
 105                 if( $wgUser->getOption( 'nocache' ) ) {
 106                         wfDebug( "USER DISABLED CACHE\n", false );
 107                         return;
 108                 }
 109
 110                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 111                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
 112
 113                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 114                         # IE sends sizes after the date like this:
 115                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 116                         # this breaks strtotime().
 117                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 118                         $modsinceTime = strtotime( $modsince );
 119                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 120                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 121                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 122                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) ) {
 123                                 # Make sure you're in a place you can leave when you call us!
 124                                 header( "HTTP/1.0 304 Not Modified" );
 125                                 $this->mLastModified = $lastmod;
 126                                 $this->sendCacheControl();
 127                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 128                                 $this->disable();
 129                                 @ob_end_clean(); // Don't output compressed blob
 130                                 return true;
 131                         } else {
 132                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 133                                 $this->mLastModified = $lastmod;
 134                         }
 135                 } else {
 136                         wfDebug( "client did not send If-Modified-Since header\n", false );
 137                         $this->mLastModified = $lastmod;
 138                 }
 139         }
 140
 141         function getPageTitleActionText () {
 142                 global $action;
 143                 switch($action) {
 144                         case 'edit':
 145                                 return wfMsg('edit');
 146                         case 'history':
 147                                 return wfMsg('history_short');
 148                         case 'protect':
 149                                 return wfMsg('protect');
 150                         case 'unprotect':
 151                                 return wfMsg('unprotect');
 152                         case 'delete':
 153                                 return wfMsg('delete');
 154                         case 'watch':
 155                                 return wfMsg('watch');
 156                         case 'unwatch':
 157                                 return wfMsg('unwatch');
 158                         case 'submit':
 159                                 return wfMsg('preview');
 160                         case 'info':
 161                                 return wfMsg('info_short');
 162                         default:
 163                                 return '';
 164                 }
 165         }
 166
 167         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 168         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 169         function setPageTitle( $name ) {
 170                 global $action, $wgContLang;
 171                 $name = $wgContLang->convert($name, true);
 172                 $this->mPagetitle = $name;
 173                 if(!empty($action)) {
 174                         $taction =  $this->getPageTitleActionText();
 175                         if( !empty( $taction ) ) {
 176                                 $name .= ' - '.$taction;
 177                         }
 178                 }
 179
 180                 $this->setHTMLTitle( wfMsg( 'pagetitle', $name ) );
 181         }
 182         function getHTMLTitle() { return $this->mHTMLtitle; }
 183         function getPageTitle() { return $this->mPagetitle; }
 184         function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 185         function getSubtitle() { return $this->mSubtitle; }
 186         function isArticle() { return $this->mIsarticle; }
 187         function setPrintable() { $this->mPrintable = true; }
 188         function isPrintable() { return $this->mPrintable; }
 189         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 190         function isSyndicated() { return $this->mShowFeedLinks; }
 191         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 192         function getOnloadHandler() { return $this->mOnloadHandler; }
 193         function disable() { $this->mDoNothing = true; }
 194
 195         function setArticleRelated( $v ) {
 196                 $this->mIsArticleRelated = $v;
 197                 if ( !$v ) {
 198                         $this->mIsarticle = false;
 199                 }
 200         }
 201         function setArticleFlag( $v ) {
 202                 $this->mIsarticle = $v;
 203                 if ( $v ) {
 204                         $this->mIsArticleRelated = $v;
 205                 }
 206         }
 207
 208         function isArticleRelated() { return $this->mIsArticleRelated; }
 209
 210         function getLanguageLinks() { return $this->mLanguageLinks; }
 211         function addLanguageLinks($newLinkArray) {
 212                 $this->mLanguageLinks += $newLinkArray;
 213         }
 214         function setLanguageLinks($newLinkArray) {
 215                 $this->mLanguageLinks = $newLinkArray;
 216         }
 217
 218         function getCategoryLinks() {
 219                 return $this->mCategoryLinks;
 220         }
 221         function addCategoryLinks($newLinkArray) {
 222                 $this->mCategoryLinks += $newLinkArray;
 223         }
 224         function setCategoryLinks($newLinkArray) {
 225                 $this->mCategoryLinks += $newLinkArray;
 226         }
 227
 228         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 229         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 230
 231         function addHTML( $text ) { $this->mBodytext .= $text; }
 232         function clearHTML() { $this->mBodytext = ''; }
 233         function getHTML() { return $this->mBodytext; }
 234         function debug( $text ) { $this->mDebugtext .= $text; }
 235
 236         function setParserOptions( $options ) {
 237                 return wfSetVar( $this->mParserOptions, $options );
 238         }
 239
 240         /**
 241          * Set the revision ID which will be seen by the wiki text parser
 242          * for things such as embedded {{REVISIONID}} variable use.
 243          * @param mixed $revid an integer, or NULL
 244          * @return mixed previous value
 245          */
 246         function setRevisionId( $revid ) {
 247                 $val = is_null( $revid ) ? null : intval( $revid );
 248                 return wfSetVar( $this->mRevisionId, $val );
 249         }
 250
 251         /**
 252          * Convert wikitext to HTML and add it to the buffer
 253          * Default assumes that the current page title will
 254          * be used.
 255          */
 256         function addWikiText( $text, $linestart = true ) {
 257                 global $wgTitle;
 258                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 259         }
 260
 261         function addWikiTextWithTitle($text, &$title, $linestart = true) {
 262                 $this->addWikiTextTitle($text, $title, $linestart);
 263         }
 264
 265         function addWikiTextTitle($text, &$title, $linestart) {
 266                 global $wgParser, $wgUseTidy;
 267                 $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions,
 268                         $linestart, true, $this->mRevisionId );
 269                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 270                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 271                 if ( $parserOutput->getCacheTime() == -1 ) {
 272                         $this->enableClientCache( false );
 273                 }
 274                 $this->addHTML( $parserOutput->getText() );
 275         }
 276
 277         /**
 278          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 279          * Saves the text into the parser cache if possible
 280          */
 281         function addPrimaryWikiText( $text, $cacheArticle ) {
 282                 global $wgParser, $wgParserCache, $wgUser, $wgUseTidy;
 283
 284                 $parserOutput = $wgParser->parse( $text, $cacheArticle->mTitle,
 285                         $this->mParserOptions, true, true, $this->mRevisionId );
 286
 287                 $text = $parserOutput->getText();
 288
 289                 if ( $cacheArticle && $parserOutput->getCacheTime() != -1 ) {
 290                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 291                 }
 292
 293                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 294                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 295                 if ( $parserOutput->getCacheTime() == -1 ) {
 296                         $this->enableClientCache( false );
 297                 }
 298                 $this->addHTML( $text );
 299         }
 300
 301         /**
 302          * Add the output of a QuickTemplate to the output buffer
 303          * @param QuickTemplate $template
 304          */
 305         function addTemplate( &$template ) {
 306                 ob_start();
 307                 $template->execute();
 308                 $this->addHtml( ob_get_contents() );
 309                 ob_end_clean();
 310         }
 311
 312         /**
 313          * Parse wikitext and return the HTML. This is for special pages that add the text later
 314          */
 315         function parse( $text, $linestart = true ) {
 316                 global $wgParser, $wgTitle;
 317                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions,
 318                         $linestart, true, $this->mRevisionId );
 319                 return $parserOutput->getText();
 320         }
 321
 322         /**
 323          * @param $article
 324          * @param $user
 325          *
 326          * @return bool
 327          */
 328         function tryParserCache( $article, $user ) {
 329                 global $wgParserCache;
 330                 $parserOutput = $wgParserCache->get( $article, $user );
 331                 if ( $parserOutput !== false ) {
 332                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 333                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 334                         $this->addHTML( $parserOutput->getText() );
 335                         $t = $parserOutput->getTitleText();
 336                         if( !empty( $t ) ) {
 337                                 $this->setPageTitle( $t );
 338                         }
 339                         return true;
 340                 } else {
 341                         return false;
 342                 }
 343         }
 344
 345         /**
 346          * Set the maximum cache time on the Squid in seconds
 347          * @param $maxage
 348          */
 349         function setSquidMaxage( $maxage ) {
 350                 $this->mSquidMaxage = $maxage;
 351         }
 352
 353         /**
 354          * Use enableClientCache(false) to force it to send nocache headers
 355          * @param $state
 356          */
 357         function enableClientCache( $state ) {
 358                 return wfSetVar( $this->mEnableClientCache, $state );
 359         }
 360
 361         function uncacheableBecauseRequestvars() {
 362                 global $wgRequest;
 363                 return  $wgRequest->getText('useskin', false) === false
 364                         && $wgRequest->getText('uselang', false) === false;
 365         }
 366
 367         function sendCacheControl() {
 368                 global $wgUseSquid, $wgUseESI;
 369
 370                 if ($this->mETag)
 371                         header("ETag: $this->mETag");
 372
 373                 # don't serve compressed data to clients who can't handle it
 374                 # maintain different caches for logged-in users and non-logged in ones
 375                 header( 'Vary: Accept-Encoding, Cookie' );
 376                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 377                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 378                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 379                         {
 380                                 if ( $wgUseESI ) {
 381                                         # We'll purge the proxy cache explicitly, but require end user agents
 382                                         # to revalidate against the proxy on each visit.
 383                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 384                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 385                                         # start with a shorter timeout for initial testing
 386                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 387                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 388                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 389                                 } else {
 390                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 391                                         # to revalidate against the proxy on each visit.
 392                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 393                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 394                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 395                                         # start with a shorter timeout for initial testing
 396                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 397                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 398                                 }
 399                         } else {
 400                                 # We do want clients to cache if they can, but they *must* check for updates
 401                                 # on revisiting the page.
 402                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 403                                 header( "Expires: -1" );
 404                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 405                         }
 406                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 407                 } else {
 408                         wfDebug( "** no caching **\n", false );
 409
 410                         # In general, the absence of a last modified header should be enough to prevent
 411                         # the client from using its cache. We send a few other things just to make sure.
 412                         header( 'Expires: -1' );
 413                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 414                         header( 'Pragma: no-cache' );
 415                 }
 416         }
 417
 418         /**
 419          * Finally, all the text has been munged and accumulated into
 420          * the object, let's actually output it:
 421          */
 422         function output() {
 423                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 424                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 425                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 426
 427                 if( $this->mDoNothing ){
 428                         return;
 429                 }
 430                 $fname = 'OutputPage::output';
 431                 wfProfileIn( $fname );
 432                 $sk = $wgUser->getSkin();
 433
 434                 if ( '' != $this->mRedirect ) {
 435                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 436                                 # Standards require redirect URLs to be absolute
 437                                 global $wgServer;
 438                                 $this->mRedirect = $wgServer . $this->mRedirect;
 439                         }
 440                         if( $this->mRedirectCode == '301') {
 441                                 if( !$wgDebugRedirects ) {
 442                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 443                                 }
 444                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 445                         }
 446
 447                         $this->sendCacheControl();
 448
 449                         if( $wgDebugRedirects ) {
 450                                 $url = htmlspecialchars( $this->mRedirect );
 451                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 452                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 453                                 print "</body>\n</html>\n";
 454                         } else {
 455                                 header( 'Location: '.$this->mRedirect );
 456                         }
 457                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 458                         wfProfileOut( $fname );
 459                         return;
 460                 }
 461                 elseif ( $this->mStatusCode )
 462                 {
 463                         $statusMessage = array(
 464                                 100 => 'Continue',
 465                                 101 => 'Switching Protocols',
 466                                 102 => 'Processing',
 467                                 200 => 'OK',
 468                                 201 => 'Created',
 469                                 202 => 'Accepted',
 470                                 203 => 'Non-Authoritative Information',
 471                                 204 => 'No Content',
 472                                 205 => 'Reset Content',
 473                                 206 => 'Partial Content',
 474                                 207 => 'Multi-Status',
 475                                 300 => 'Multiple Choices',
 476                                 301 => 'Moved Permanently',
 477                                 302 => 'Found',
 478                                 303 => 'See Other',
 479                                 304 => 'Not Modified',
 480                                 305 => 'Use Proxy',
 481                                 307 => 'Temporary Redirect',
 482                                 400 => 'Bad Request',
 483                                 401 => 'Unauthorized',
 484                                 402 => 'Payment Required',
 485                                 403 => 'Forbidden',
 486                                 404 => 'Not Found',
 487                                 405 => 'Method Not Allowed',
 488                                 406 => 'Not Acceptable',
 489                                 407 => 'Proxy Authentication Required',
 490                                 408 => 'Request Timeout',
 491                                 409 => 'Conflict',
 492                                 410 => 'Gone',
 493                                 411 => 'Length Required',
 494                                 412 => 'Precondition Failed',
 495                                 413 => 'Request Entity Too Large',
 496                                 414 => 'Request-URI Too Large',
 497                                 415 => 'Unsupported Media Type',
 498                                 416 => 'Request Range Not Satisfiable',
 499                                 417 => 'Expectation Failed',
 500                                 422 => 'Unprocessable Entity',
 501                                 423 => 'Locked',
 502                                 424 => 'Failed Dependency',
 503                                 500 => 'Internal Server Error',
 504                                 501 => 'Not Implemented',
 505                                 502 => 'Bad Gateway',
 506                                 503 => 'Service Unavailable',
 507                                 504 => 'Gateway Timeout',
 508                                 505 => 'HTTP Version Not Supported',
 509                                 507 => 'Insufficient Storage'
 510                         );
 511
 512                         if ( $statusMessage[$this->mStatusCode] )
 513                                 header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 514                 }
 515
 516                 # Buffer output; final headers may depend on later processing
 517                 ob_start();
 518
 519                 $this->transformBuffer();
 520
 521                 # Disable temporary placeholders, so that the skin produces HTML
 522                 $sk->postParseLinkColour( false );
 523
 524                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 525                 header( 'Content-language: '.$wgContLanguageCode );
 526
 527                 $exp = time() + $wgCookieExpiration;
 528                 foreach( $this->mCookies as $name => $val ) {
 529                         setcookie( $name, $val, $exp, '/' );
 530                 }
 531
 532                 if ($this->mArticleBodyOnly) {
 533                         $this->out($this->mBodytext);
 534                 } else {
 535                         wfProfileIn( 'Output-skin' );
 536                         $sk->outputPage( $this );
 537                         wfProfileOut( 'Output-skin' );
 538                 }
 539
 540                 $this->sendCacheControl();
 541                 ob_end_flush();
 542                 wfProfileOut( $fname );
 543         }
 544
 545         function out( $ins ) {
 546                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 547                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 548                         $outs = $ins;
 549                 } else {
 550                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 551                         if ( false === $outs ) { $outs = $ins; }
 552                 }
 553                 print $outs;
 554         }
 555
 556         function setEncodings() {
 557                 global $wgInputEncoding, $wgOutputEncoding;
 558                 global $wgUser, $wgContLang;
 559
 560                 $wgInputEncoding = strtolower( $wgInputEncoding );
 561
 562                 if( $wgUser->getOption( 'altencoding' ) ) {
 563                         $wgContLang->setAltEncoding();
 564                         return;
 565                 }
 566
 567                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 568                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 569                         return;
 570                 }
 571                 $wgOutputEncoding = $wgInputEncoding;
 572         }
 573
 574         /**
 575          * Returns a HTML comment with the elapsed time since request.
 576          * This method has no side effects.
 577          * Use wfReportTime() instead.
 578          * @return string
 579          * @deprecated
 580          */
 581         function reportTime() {
 582                 $time = wfReportTime();
 583                 return $time;
 584         }
 585
 586         /**
 587          * Note: these arguments are keys into wfMsg(), not text!
 588          */
 589         function errorpage( $title, $msg ) {
 590                 global $wgTitle;
 591
 592                 $this->mDebugtext .= 'Original title: ' .
 593                   $wgTitle->getPrefixedText() . "\n";
 594                 $this->setPageTitle( wfMsg( $title ) );
 595                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 596                 $this->setRobotpolicy( 'noindex,nofollow' );
 597                 $this->setArticleRelated( false );
 598                 $this->enableClientCache( false );
 599                 $this->mRedirect = '';
 600
 601                 $this->mBodytext = '';
 602                 $this->addWikiText( wfMsg( $msg ) );
 603                 $this->returnToMain( false );
 604
 605                 $this->output();
 606                 wfErrorExit();
 607         }
 608
 609         /**
 610          * Display an error page indicating that a given version of MediaWiki is
 611          * required to use it
 612          *
 613          * @param mixed $version The version of MediaWiki needed to use the page
 614          */
 615         function versionRequired( $version ) {
 616                 global $wgUser;
 617
 618                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 619                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 620                 $this->setRobotpolicy( 'noindex,nofollow' );
 621                 $this->setArticleRelated( false );
 622                 $this->mBodytext = '';
 623
 624                 $sk = $wgUser->getSkin();
 625                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 626                 $this->returnToMain();
 627         }
 628
 629         /**
 630          * Display an error page noting that a given permission bit is required.
 631          * This should generally replace the sysopRequired, developerRequired etc.
 632          * @param string $permission key required
 633          */
 634         function permissionRequired( $permission ) {
 635                 global $wgUser;
 636
 637                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 638                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 639                 $this->setRobotpolicy( 'noindex,nofollow' );
 640                 $this->setArticleRelated( false );
 641                 $this->mBodytext = '';
 642
 643                 $sk = $wgUser->getSkin();
 644                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ) );
 645                 $this->addHTML( wfMsgHtml( 'badaccesstext', $ap, $permission ) );
 646                 $this->returnToMain();
 647         }
 648
 649         /**
 650          * @deprecated
 651          */
 652         function sysopRequired() {
 653                 global $wgUser;
 654
 655                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 656                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 657                 $this->setRobotpolicy( 'noindex,nofollow' );
 658                 $this->setArticleRelated( false );
 659                 $this->mBodytext = '';
 660
 661                 $sk = $wgUser->getSkin();
 662                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 663                 $this->addHTML( wfMsgHtml( 'sysoptext', $ap ) );
 664                 $this->returnToMain();
 665         }
 666
 667         /**
 668          * @deprecated
 669          */
 670         function developerRequired() {
 671                 global $wgUser;
 672
 673                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 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( 'developertext', $ap ) );
 682                 $this->returnToMain();
 683         }
 684
 685         function loginToUse() {
 686                 global $wgUser, $wgTitle, $wgContLang;
 687
 688                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 689                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 690                 $this->setRobotpolicy( 'noindex,nofollow' );
 691                 $this->setArticleFlag( false );
 692                 $this->mBodytext = '';
 693                 $loginpage = Title::makeTitle(NS_SPECIAL, 'Userlogin');
 694                 $sk = $wgUser->getSkin();
 695                 $loginlink = $sk->makeKnownLinkObj($loginpage, wfMsg('loginreqlink'),
 696                         'returnto=' . htmlspecialchars($wgTitle->getPrefixedDBkey()));
 697                 $this->addHTML( wfMsgHtml( 'loginreqpagetext', $loginlink ) );
 698
 699                 # We put a comment in the .html file so a Sysop can diagnose the page the
 700                 # user can't see.
 701                 $this->addHTML( "\n<!--" .
 702                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 703                                                 ':' .
 704                                                 $wgTitle->getDBkey() . '-->' );
 705                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 706         }
 707
 708         function databaseError( $fname, $sql, $error, $errno ) {
 709                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 710
 711                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 712                 $this->setRobotpolicy( 'noindex,nofollow' );
 713                 $this->setArticleRelated( false );
 714                 $this->enableClientCache( false );
 715                 $this->mRedirect = '';
 716
 717                 if( !$wgShowSQLErrors ) {
 718                         $sql = wfMsg( 'sqlhidden' );
 719                 }
 720
 721                 if ( $wgCommandLineMode ) {
 722                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 723                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 724                 } else {
 725                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 726                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 727                 }
 728
 729                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 730                         print $msg."\n";
 731                         wfErrorExit();
 732                 }
 733                 $this->mBodytext = $msg;
 734                 $this->output();
 735                 wfErrorExit();
 736         }
 737
 738         function readOnlyPage( $source = null, $protected = false ) {
 739                 global $wgUser, $wgReadOnlyFile, $wgReadOnly;
 740
 741                 $this->setRobotpolicy( 'noindex,nofollow' );
 742                 $this->setArticleRelated( false );
 743
 744                 if( $protected ) {
 745                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 746                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 747                 } else {
 748                         $this->setPageTitle( wfMsg( 'readonly' ) );
 749                         if ( $wgReadOnly ) {
 750                                 $reason = $wgReadOnly;
 751                         } else {
 752                                 $reason = file_get_contents( $wgReadOnlyFile );
 753                         }
 754                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 755                 }
 756
 757                 if( is_string( $source ) ) {
 758                         if( strcmp( $source, '' ) == 0 ) {
 759                                 $source = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 760                         }
 761                         $rows = $wgUser->getOption( 'rows' );
 762                         $cols = $wgUser->getOption( 'cols' );
 763                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 764                                 htmlspecialchars( $source ) . "\n</textarea>";
 765                         $this->addHTML( $text );
 766                 }
 767
 768                 $this->returnToMain( false );
 769         }
 770
 771         function fatalError( $message ) {
 772                 $this->setPageTitle( wfMsg( "internalerror" ) );
 773                 $this->setRobotpolicy( "noindex,nofollow" );
 774                 $this->setArticleRelated( false );
 775                 $this->enableClientCache( false );
 776                 $this->mRedirect = '';
 777
 778                 $this->mBodytext = $message;
 779                 $this->output();
 780                 wfErrorExit();
 781         }
 782
 783         function unexpectedValueError( $name, $val ) {
 784                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 785         }
 786
 787         function fileCopyError( $old, $new ) {
 788                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 789         }
 790
 791         function fileRenameError( $old, $new ) {
 792                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 793         }
 794
 795         function fileDeleteError( $name ) {
 796                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 797         }
 798
 799         function fileNotFoundError( $name ) {
 800                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 801         }
 802
 803         /**
 804          * return from error messages or notes
 805          * @param $auto automatically redirect the user after 10 seconds
 806          * @param $returnto page title to return to. Default is Main Page.
 807          */
 808         function returnToMain( $auto = true, $returnto = NULL ) {
 809                 global $wgUser, $wgOut, $wgRequest;
 810
 811                 if ( $returnto == NULL ) {
 812                         $returnto = $wgRequest->getText( 'returnto' );
 813                 }
 814                 $returnto = htmlspecialchars( $returnto );
 815
 816                 $sk = $wgUser->getSkin();
 817                 if ( '' == $returnto ) {
 818                         $returnto = wfMsgForContent( 'mainpage' );
 819                 }
 820                 $link = $sk->makeKnownLink( $returnto, '' );
 821
 822                 $r = wfMsg( 'returnto', $link );
 823                 if ( $auto ) {
 824                         $titleObj = Title::newFromText( $returnto );
 825                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 826                 }
 827                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 828         }
 829
 830         /**
 831          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
 832          * and uses the first 10 of them for META keywords
 833          */
 834         function addMetaTags () {
 835                 global $wgLinkCache , $wgOut ;
 836                 $categories = array_keys ( $wgLinkCache->mCategoryLinks ) ;
 837                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 838                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 839                 $a = array_merge ( array_slice ( $good , 0 , 1 ), $categories, array_slice ( $good , 1 , 9 ) , $bad ) ;
 840                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 841                 $a = implode ( ',' , $a ) ;
 842                 $strip = array(
 843                         "/<.*?>/" => '',
 844                         "/_/" => ' '
 845                 );
 846                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 847
 848                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 849         }
 850
 851         /**
 852          * @private
 853          * @return string
 854          */
 855         function headElement() {
 856                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 857                 global $wgUser, $wgContLang, $wgRequest, $wgUseTrackbacks, $wgTitle;
 858
 859                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 860                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 861                 } else {
 862                         $ret = '';
 863                 }
 864
 865                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 866
 867                 if ( '' == $this->getHTMLTitle() ) {
 868                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
 869                 }
 870
 871                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 872                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 873                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
 874                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 875
 876                 $ret .= $this->getHeadLinks();
 877                 global $wgStylePath;
 878                 if( $this->isPrintable() ) {
 879                         $media = '';
 880                 } else {
 881                         $media = "media='print'";
 882                 }
 883                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 884                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 885
 886                 $sk = $wgUser->getSkin();
 887                 $ret .= $sk->getHeadScripts();
 888                 $ret .= $this->mScripts;
 889                 $ret .= $sk->getUserStyles();
 890
 891                 if ($wgUseTrackbacks && $this->isArticleRelated())
 892                         $ret .= $wgTitle->trackbackRDF();
 893
 894                 $ret .= "</head>\n";
 895                 return $ret;
 896         }
 897
 898         function getHeadLinks() {
 899                 global $wgRequest, $wgStylePath;
 900                 $ret = '';
 901                 foreach ( $this->mMetatags as $tag ) {
 902                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 903                                 $a = 'http-equiv';
 904                                 $tag[0] = substr( $tag[0], 5 );
 905                         } else {
 906                                 $a = 'name';
 907                         }
 908                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 909                 }
 910                 $p = $this->mRobotpolicy;
 911                 if ( '' == $p ) { $p = 'index,follow'; }
 912                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 913
 914                 if ( count( $this->mKeywords ) > 0 ) {
 915                         $strip = array(
 916                                 "/<.*?>/" => '',
 917                                 "/_/" => ' '
 918                         );
 919                         $ret .= "<meta name=\"keywords\" content=\"" .
 920                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 921                 }
 922                 foreach ( $this->mLinktags as $tag ) {
 923                         $ret .= '<link';
 924                         foreach( $tag as $attr => $val ) {
 925                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 926                         }
 927                         $ret .= " />\n";
 928                 }
 929                 if( $this->isSyndicated() ) {
 930                         # FIXME: centralize the mime-type and name information in Feed.php
 931                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 932                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 933                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 934                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 0.3' href='$link' />\n";
 935                 }
 936
 937                 return $ret;
 938         }
 939
 940         /**
 941          * Run any necessary pre-output transformations on the buffer text
 942          */
 943         function transformBuffer( $options = 0 ) {
 944         }
 945
 946
 947         /**
 948          * Turn off regular page output and return an error reponse
 949          * for when rate limiting has triggered.
 950          * @todo i18n
 951          * @access public
 952          */
 953         function rateLimited() {
 954                 global $wgOut;
 955                 $wgOut->disable();
 956                 wfHttpError( 500, 'Internal Server Error',
 957                         'Sorry, the server has encountered an internal error. ' .
 958                         'Please wait a moment and hit "refresh" to submit the request again.' );
 959         }
 960
 961 }
 962
 963 } // MediaWiki
 964
 965 ?>