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 $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;
 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;
 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, $wgCookieExpiration, $wgOutputEncoding;
 424                 global $wgContLanguageCode, $wgDebugRedirects, $wgMimeType, $wgProfiler;
 425
 426                 if( $this->mDoNothing ){
 427                         return;
 428                 }
 429                 $fname = 'OutputPage::output';
 430                 wfProfileIn( $fname );
 431                 $sk = $wgUser->getSkin();
 432
 433                 if ( '' != $this->mRedirect ) {
 434                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 435                                 # Standards require redirect URLs to be absolute
 436                                 global $wgServer;
 437                                 $this->mRedirect = $wgServer . $this->mRedirect;
 438                         }
 439                         if( $this->mRedirectCode == '301') {
 440                                 if( !$wgDebugRedirects ) {
 441                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 442                                 }
 443                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 444                         }
 445
 446                         $this->sendCacheControl();
 447
 448                         if( $wgDebugRedirects ) {
 449                                 $url = htmlspecialchars( $this->mRedirect );
 450                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 451                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 452                                 print "</body>\n</html>\n";
 453                         } else {
 454                                 header( 'Location: '.$this->mRedirect );
 455                         }
 456                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 457                         wfProfileOut( $fname );
 458                         return;
 459                 }
 460                 elseif ( $this->mStatusCode )
 461                 {
 462                         $statusMessage = array(
 463                                 100 => 'Continue',
 464                                 101 => 'Switching Protocols',
 465                                 102 => 'Processing',
 466                                 200 => 'OK',
 467                                 201 => 'Created',
 468                                 202 => 'Accepted',
 469                                 203 => 'Non-Authoritative Information',
 470                                 204 => 'No Content',
 471                                 205 => 'Reset Content',
 472                                 206 => 'Partial Content',
 473                                 207 => 'Multi-Status',
 474                                 300 => 'Multiple Choices',
 475                                 301 => 'Moved Permanently',
 476                                 302 => 'Found',
 477                                 303 => 'See Other',
 478                                 304 => 'Not Modified',
 479                                 305 => 'Use Proxy',
 480                                 307 => 'Temporary Redirect',
 481                                 400 => 'Bad Request',
 482                                 401 => 'Unauthorized',
 483                                 402 => 'Payment Required',
 484                                 403 => 'Forbidden',
 485                                 404 => 'Not Found',
 486                                 405 => 'Method Not Allowed',
 487                                 406 => 'Not Acceptable',
 488                                 407 => 'Proxy Authentication Required',
 489                                 408 => 'Request Timeout',
 490                                 409 => 'Conflict',
 491                                 410 => 'Gone',
 492                                 411 => 'Length Required',
 493                                 412 => 'Precondition Failed',
 494                                 413 => 'Request Entity Too Large',
 495                                 414 => 'Request-URI Too Large',
 496                                 415 => 'Unsupported Media Type',
 497                                 416 => 'Request Range Not Satisfiable',
 498                                 417 => 'Expectation Failed',
 499                                 422 => 'Unprocessable Entity',
 500                                 423 => 'Locked',
 501                                 424 => 'Failed Dependency',
 502                                 500 => 'Internal Server Error',
 503                                 501 => 'Not Implemented',
 504                                 502 => 'Bad Gateway',
 505                                 503 => 'Service Unavailable',
 506                                 504 => 'Gateway Timeout',
 507                                 505 => 'HTTP Version Not Supported',
 508                                 507 => 'Insufficient Storage'
 509                         );
 510
 511                         if ( $statusMessage[$this->mStatusCode] )
 512                                 header( 'HTTP/1.1 ' . $this->mStatusCode . ' ' . $statusMessage[$this->mStatusCode] );
 513                 }
 514
 515                 # Buffer output; final headers may depend on later processing
 516                 ob_start();
 517
 518                 $this->transformBuffer();
 519
 520                 # Disable temporary placeholders, so that the skin produces HTML
 521                 $sk->postParseLinkColour( false );
 522
 523                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 524                 header( 'Content-language: '.$wgContLanguageCode );
 525
 526                 $exp = time() + $wgCookieExpiration;
 527                 foreach( $this->mCookies as $name => $val ) {
 528                         setcookie( $name, $val, $exp, '/' );
 529                 }
 530
 531                 if ($this->mArticleBodyOnly) {
 532                         $this->out($this->mBodytext);
 533                 } else {
 534                         wfProfileIn( 'Output-skin' );
 535                         $sk->outputPage( $this );
 536                         wfProfileOut( 'Output-skin' );
 537                 }
 538
 539                 $this->sendCacheControl();
 540                 ob_end_flush();
 541                 wfProfileOut( $fname );
 542         }
 543
 544         function out( $ins ) {
 545                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 546                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 547                         $outs = $ins;
 548                 } else {
 549                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 550                         if ( false === $outs ) { $outs = $ins; }
 551                 }
 552                 print $outs;
 553         }
 554
 555         function setEncodings() {
 556                 global $wgInputEncoding, $wgOutputEncoding;
 557                 global $wgUser, $wgContLang;
 558
 559                 $wgInputEncoding = strtolower( $wgInputEncoding );
 560
 561                 if( $wgUser->getOption( 'altencoding' ) ) {
 562                         $wgContLang->setAltEncoding();
 563                         return;
 564                 }
 565
 566                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 567                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 568                         return;
 569                 }
 570                 $wgOutputEncoding = $wgInputEncoding;
 571         }
 572
 573         /**
 574          * Returns a HTML comment with the elapsed time since request.
 575          * This method has no side effects.
 576          * Use wfReportTime() instead.
 577          * @return string
 578          * @deprecated
 579          */
 580         function reportTime() {
 581                 $time = wfReportTime();
 582                 return $time;
 583         }
 584
 585         /**
 586          * Note: these arguments are keys into wfMsg(), not text!
 587          */
 588         function errorpage( $title, $msg ) {
 589                 global $wgTitle;
 590
 591                 $this->mDebugtext .= 'Original title: ' .
 592                   $wgTitle->getPrefixedText() . "\n";
 593                 $this->setPageTitle( wfMsg( $title ) );
 594                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 595                 $this->setRobotpolicy( 'noindex,nofollow' );
 596                 $this->setArticleRelated( false );
 597                 $this->enableClientCache( false );
 598                 $this->mRedirect = '';
 599
 600                 $this->mBodytext = '';
 601                 $this->addWikiText( wfMsg( $msg ) );
 602                 $this->returnToMain( false );
 603
 604                 $this->output();
 605                 wfErrorExit();
 606         }
 607
 608         /**
 609          * Display an error page indicating that a given version of MediaWiki is
 610          * required to use it
 611          *
 612          * @param mixed $version The version of MediaWiki needed to use the page
 613          */
 614         function versionRequired( $version ) {
 615                 global $wgUser;
 616
 617                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 618                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 619                 $this->setRobotpolicy( 'noindex,nofollow' );
 620                 $this->setArticleRelated( false );
 621                 $this->mBodytext = '';
 622
 623                 $sk = $wgUser->getSkin();
 624                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 625                 $this->returnToMain();
 626         }
 627
 628         /**
 629          * Display an error page noting that a given permission bit is required.
 630          * This should generally replace the sysopRequired, developerRequired etc.
 631          * @param string $permission key required
 632          */
 633         function permissionRequired( $permission ) {
 634                 global $wgUser;
 635
 636                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 637                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 638                 $this->setRobotpolicy( 'noindex,nofollow' );
 639                 $this->setArticleRelated( false );
 640                 $this->mBodytext = '';
 641
 642                 $sk = $wgUser->getSkin();
 643                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ) );
 644                 $this->addHTML( wfMsgHtml( 'badaccesstext', $ap, $permission ) );
 645                 $this->returnToMain();
 646         }
 647
 648         /**
 649          * @deprecated
 650          */
 651         function sysopRequired() {
 652                 global $wgUser;
 653
 654                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 655                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 656                 $this->setRobotpolicy( 'noindex,nofollow' );
 657                 $this->setArticleRelated( false );
 658                 $this->mBodytext = '';
 659
 660                 $sk = $wgUser->getSkin();
 661                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 662                 $this->addHTML( wfMsgHtml( 'sysoptext', $ap ) );
 663                 $this->returnToMain();
 664         }
 665
 666         /**
 667          * @deprecated
 668          */
 669         function developerRequired() {
 670                 global $wgUser;
 671
 672                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 673                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 674                 $this->setRobotpolicy( 'noindex,nofollow' );
 675                 $this->setArticleRelated( false );
 676                 $this->mBodytext = '';
 677
 678                 $sk = $wgUser->getSkin();
 679                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 680                 $this->addHTML( wfMsgHtml( 'developertext', $ap ) );
 681                 $this->returnToMain();
 682         }
 683
 684         function loginToUse() {
 685                 global $wgUser, $wgTitle, $wgContLang;
 686
 687                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 688                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 689                 $this->setRobotpolicy( 'noindex,nofollow' );
 690                 $this->setArticleFlag( false );
 691                 $this->mBodytext = '';
 692                 $loginpage = Title::makeTitle(NS_SPECIAL, 'Userlogin');
 693                 $sk = $wgUser->getSkin();
 694                 $loginlink = $sk->makeKnownLinkObj($loginpage, wfMsg('loginreqlink'),
 695                         'returnto=' . htmlspecialchars($wgTitle->getPrefixedDBkey()));
 696                 $this->addHTML( wfMsgHtml( 'loginreqpagetext', $loginlink ) );
 697
 698                 # We put a comment in the .html file so a Sysop can diagnose the page the
 699                 # user can't see.
 700                 $this->addHTML( "\n<!--" .
 701                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 702                                                 ':' .
 703                                                 $wgTitle->getDBkey() . '-->' );
 704                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 705         }
 706
 707         function databaseError( $fname, $sql, $error, $errno ) {
 708                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 709
 710                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 711                 $this->setRobotpolicy( 'noindex,nofollow' );
 712                 $this->setArticleRelated( false );
 713                 $this->enableClientCache( false );
 714                 $this->mRedirect = '';
 715
 716                 if( !$wgShowSQLErrors ) {
 717                         $sql = wfMsg( 'sqlhidden' );
 718                 }
 719
 720                 if ( $wgCommandLineMode ) {
 721                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 722                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 723                 } else {
 724                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 725                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 726                 }
 727
 728                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 729                         print $msg."\n";
 730                         wfErrorExit();
 731                 }
 732                 $this->mBodytext = $msg;
 733                 $this->output();
 734                 wfErrorExit();
 735         }
 736
 737         function readOnlyPage( $source = null, $protected = false ) {
 738                 global $wgUser, $wgReadOnlyFile, $wgReadOnly;
 739
 740                 $this->setRobotpolicy( 'noindex,nofollow' );
 741                 $this->setArticleRelated( false );
 742
 743                 if( $protected ) {
 744                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 745                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 746                 } else {
 747                         $this->setPageTitle( wfMsg( 'readonly' ) );
 748                         if ( $wgReadOnly ) {
 749                                 $reason = $wgReadOnly;
 750                         } else {
 751                                 $reason = file_get_contents( $wgReadOnlyFile );
 752                         }
 753                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 754                 }
 755
 756                 if( is_string( $source ) ) {
 757                         if( strcmp( $source, '' ) == 0 ) {
 758                                 $source = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 759                         }
 760                         $rows = $wgUser->getOption( 'rows' );
 761                         $cols = $wgUser->getOption( 'cols' );
 762                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 763                                 htmlspecialchars( $source ) . "\n</textarea>";
 764                         $this->addHTML( $text );
 765                 }
 766
 767                 $this->returnToMain( false );
 768         }
 769
 770         function fatalError( $message ) {
 771                 $this->setPageTitle( wfMsg( "internalerror" ) );
 772                 $this->setRobotpolicy( "noindex,nofollow" );
 773                 $this->setArticleRelated( false );
 774                 $this->enableClientCache( false );
 775                 $this->mRedirect = '';
 776
 777                 $this->mBodytext = $message;
 778                 $this->output();
 779                 wfErrorExit();
 780         }
 781
 782         function unexpectedValueError( $name, $val ) {
 783                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 784         }
 785
 786         function fileCopyError( $old, $new ) {
 787                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 788         }
 789
 790         function fileRenameError( $old, $new ) {
 791                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 792         }
 793
 794         function fileDeleteError( $name ) {
 795                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 796         }
 797
 798         function fileNotFoundError( $name ) {
 799                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 800         }
 801
 802         /**
 803          * return from error messages or notes
 804          * @param $auto automatically redirect the user after 10 seconds
 805          * @param $returnto page title to return to. Default is Main Page.
 806          */
 807         function returnToMain( $auto = true, $returnto = NULL ) {
 808                 global $wgUser, $wgOut, $wgRequest;
 809
 810                 if ( $returnto == NULL ) {
 811                         $returnto = $wgRequest->getText( 'returnto' );
 812                 }
 813                 $returnto = htmlspecialchars( $returnto );
 814
 815                 $sk = $wgUser->getSkin();
 816                 if ( '' == $returnto ) {
 817                         $returnto = wfMsgForContent( 'mainpage' );
 818                 }
 819                 $link = $sk->makeKnownLink( $returnto, '' );
 820
 821                 $r = wfMsg( 'returnto', $link );
 822                 if ( $auto ) {
 823                         $titleObj = Title::newFromText( $returnto );
 824                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 825                 }
 826                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 827         }
 828
 829         /**
 830          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
 831          * and uses the first 10 of them for META keywords
 832          */
 833         function addMetaTags () {
 834                 global $wgLinkCache , $wgOut ;
 835                 $categories = array_keys ( $wgLinkCache->mCategoryLinks ) ;
 836                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 837                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 838                 $a = array_merge ( array_slice ( $good , 0 , 1 ), $categories, array_slice ( $good , 1 , 9 ) , $bad ) ;
 839                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 840                 $a = implode ( ',' , $a ) ;
 841                 $strip = array(
 842                         "/<.*?>/" => '',
 843                         "/_/" => ' '
 844                 );
 845                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 846
 847                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 848         }
 849
 850         /**
 851          * @private
 852          * @return string
 853          */
 854         function headElement() {
 855                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 856                 global $wgUser, $wgContLang, $wgRequest, $wgUseTrackbacks, $wgTitle;
 857
 858                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 859                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 860                 } else {
 861                         $ret = '';
 862                 }
 863
 864                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 865
 866                 if ( '' == $this->getHTMLTitle() ) {
 867                         $this->setHTMLTitle(  wfMsg( 'pagetitle', $this->getPageTitle() ));
 868                 }
 869
 870                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 871                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 872                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->getHTMLTitle() ) . "</title>\n";
 873                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 874
 875                 $ret .= $this->getHeadLinks();
 876                 global $wgStylePath;
 877                 if( $this->isPrintable() ) {
 878                         $media = '';
 879                 } else {
 880                         $media = "media='print'";
 881                 }
 882                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 883                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 884
 885                 $sk = $wgUser->getSkin();
 886                 $ret .= $sk->getHeadScripts();
 887                 $ret .= $this->mScripts;
 888                 $ret .= $sk->getUserStyles();
 889
 890                 if ($wgUseTrackbacks && $this->isArticleRelated())
 891                         $ret .= $wgTitle->trackbackRDF();
 892
 893                 $ret .= "</head>\n";
 894                 return $ret;
 895         }
 896
 897         function getHeadLinks() {
 898                 global $wgRequest, $wgStylePath;
 899                 $ret = '';
 900                 foreach ( $this->mMetatags as $tag ) {
 901                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 902                                 $a = 'http-equiv';
 903                                 $tag[0] = substr( $tag[0], 5 );
 904                         } else {
 905                                 $a = 'name';
 906                         }
 907                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 908                 }
 909                 $p = $this->mRobotpolicy;
 910                 if ( '' == $p ) { $p = 'index,follow'; }
 911                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 912
 913                 if ( count( $this->mKeywords ) > 0 ) {
 914                         $strip = array(
 915                                 "/<.*?>/" => '',
 916                                 "/_/" => ' '
 917                         );
 918                         $ret .= "<meta name=\"keywords\" content=\"" .
 919                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 920                 }
 921                 foreach ( $this->mLinktags as $tag ) {
 922                         $ret .= '<link';
 923                         foreach( $tag as $attr => $val ) {
 924                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 925                         }
 926                         $ret .= " />\n";
 927                 }
 928                 if( $this->isSyndicated() ) {
 929                         # FIXME: centralize the mime-type and name information in Feed.php
 930                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 931                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 932                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 933                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 0.3' href='$link' />\n";
 934                 }
 935
 936                 return $ret;
 937         }
 938
 939         /**
 940          * Run any necessary pre-output transformations on the buffer text
 941          */
 942         function transformBuffer( $options = 0 ) {
 943         }
 944
 945
 946         /**
 947          * Turn off regular page output and return an error reponse
 948          * for when rate limiting has triggered.
 949          * @todo i18n
 950          * @access public
 951          */
 952         function rateLimited() {
 953                 global $wgOut;
 954                 $wgOut->disable();
 955                 wfHttpError( 500, 'Internal Server Error',
 956                         'Sorry, the server has encountered an internal error. ' .
 957                         'Please wait a moment and hit "refresh" to submit the request again.' );
 958         }
 959
 960 }
 961
 962 } // MediaWiki
 963
 964 ?>