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.doc
  12
  13 if($wgUseTeX) require_once( 'Math.php' );
  14
  15 /**
  16  * @todo document
  17  * @package MediaWiki
  18  */
  19 class OutputPage {
  20         var $mHeaders, $mCookies, $mMetatags, $mKeywords;
  21         var $mLinktags, $mPagetitle, $mBodytext, $mDebugtext;
  22         var $mHTMLtitle, $mRobotpolicy, $mIsarticle, $mPrintable;
  23         var $mSubtitle, $mRedirect;
  24         var $mLastModified, $mCategoryLinks;
  25         var $mScripts, $mLinkColours;
  26
  27         var $mSuppressQuickbar;
  28         var $mOnloadHandler;
  29         var $mDoNothing;
  30         var $mContainsOldMagic, $mContainsNewMagic;
  31         var $mIsArticleRelated;
  32         var $mParserOptions;
  33         var $mShowFeedLinks = false;
  34         var $mEnableClientCache = true;
  35
  36         /**
  37          * Constructor
  38          * Initialise private variables
  39          */
  40         function OutputPage() {
  41                 $this->mHeaders = $this->mCookies = $this->mMetatags =
  42                 $this->mKeywords = $this->mLinktags = array();
  43                 $this->mHTMLtitle = $this->mPagetitle = $this->mBodytext =
  44                 $this->mRedirect = $this->mLastModified =
  45                 $this->mSubtitle = $this->mDebugtext = $this->mRobotpolicy =
  46                 $this->mOnloadHandler = '';
  47                 $this->mIsArticleRelated = $this->mIsarticle = $this->mPrintable = true;
  48                 $this->mSuppressQuickbar = $this->mPrintable = false;
  49                 $this->mLanguageLinks = array();
  50                 $this->mCategoryLinks = array() ;
  51                 $this->mDoNothing = false;
  52                 $this->mContainsOldMagic = $this->mContainsNewMagic = 0;
  53                 $this->mParserOptions = ParserOptions::newFromUser( $temp = NULL );
  54                 $this->mSquidMaxage = 0;
  55                 $this->mScripts = '';
  56         }
  57
  58         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
  59         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  60         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  61
  62         # To add an http-equiv meta tag, precede the name with "http:"
  63         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  64         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  65         function addScript( $script ) { $this->mScripts .= $script; }
  66         function getScript() { return $this->mScripts; }
  67
  68         function addLink( $linkarr ) {
  69                 # $linkarr should be an associative array of attributes. We'll escape on output.
  70                 array_push( $this->mLinktags, $linkarr );
  71         }
  72
  73         function addMetadataLink( $linkarr ) {
  74                 # note: buggy CC software only reads first "meta" link
  75                 static $haveMeta = false;
  76                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  77                 $this->addLink( $linkarr );
  78                 $haveMeta = true;
  79         }
  80
  81         /**
  82          * checkLastModified tells the client to use the client-cached page if
  83          * possible. If sucessful, the OutputPage is disabled so that
  84          * any future call to OutputPage->output() have no effect. The method
  85          * returns true iff cache-ok headers was sent.
  86          */
  87         function checkLastModified ( $timestamp ) {
  88                 global $wgLang, $wgCachePages, $wgUser;
  89                 $timestamp=wfTimestamp(TS_MW,$timestamp);
  90                 if( !$wgCachePages ) {
  91                         wfDebug( "CACHE DISABLED\n", false );
  92                         return;
  93                 }
  94                 if( $wgUser->getOption( 'nocache' ) ) {
  95                         wfDebug( "USER DISABLED CACHE\n", false );
  96                         return;
  97                 }
  98
  99                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
 100
 101                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 102                         # IE sends sizes after the date like this:
 103                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 104                         # this breaks strtotime().
 105                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 106                         $ismodsince = wfTimestamp( TS_MW, strtotime( $modsince ) );
 107                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 108                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 109                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) ) {
 110                                 # Make sure you're in a place you can leave when you call us!
 111                                 header( "HTTP/1.0 304 Not Modified" );
 112                                 $this->mLastModified = $lastmod;
 113                                 $this->sendCacheControl();
 114                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 115                                 $this->disable();
 116                                 return true;
 117                         } else {
 118                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 119                                 $this->mLastModified = $lastmod;
 120                         }
 121                 } else {
 122                         wfDebug( "We're confused.\n", false );
 123                         $this->mLastModified = $lastmod;
 124                 }
 125         }
 126
 127         function getPageTitleActionText () {
 128                 global $action;
 129                 switch($action) {
 130                         case 'edit':
 131                                 return wfMsg('edit');
 132                         case 'history':
 133                                 return wfMsg('history_short');
 134                         case 'protect':
 135                                 return wfMsg('protect');
 136                         case 'unprotect':
 137                                 return wfMsg('unprotect');
 138                         case 'delete':
 139                                 return wfMsg('delete');
 140                         case 'watch':
 141                                 return wfMsg('watch');
 142                         case 'unwatch':
 143                                 return wfMsg('unwatch');
 144                         case 'submit':
 145                                 return wfMsg('preview');
 146                         case 'info':
 147                                 return wfMsg('info_short');
 148                         default:
 149                                 return '';
 150                 }
 151         }
 152
 153         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 154         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 155         function setPageTitle( $name ) {
 156                 global $action, $wgContLang;
 157                 $name = $wgContLang->convert($name, true);
 158                 $this->mPagetitle = $name;
 159                 if(!empty($action)) {
 160                         $taction =  $this->getPageTitleActionText();
 161                         if( !empty( $taction ) ) {
 162                                 $name .= ' - '.$taction;
 163                         }
 164                 }
 165                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 166         }
 167         function getHTMLTitle() { return $this->mHTMLtitle; }
 168         function getPageTitle() { return $this->mPagetitle; }
 169         function setSubtitle( $str ) { $this->mSubtitle = $str; }
 170         function getSubtitle() { return $this->mSubtitle; }
 171         function isArticle() { return $this->mIsarticle; }
 172         function setPrintable() { $this->mPrintable = true; }
 173         function isPrintable() { return $this->mPrintable; }
 174         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 175         function isSyndicated() { return $this->mShowFeedLinks; }
 176         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 177         function getOnloadHandler() { return $this->mOnloadHandler; }
 178         function disable() { $this->mDoNothing = true; }
 179
 180         function setArticleRelated( $v ) {
 181                 $this->mIsArticleRelated = $v;
 182                 if ( !$v ) {
 183                         $this->mIsarticle = false;
 184                 }
 185         }
 186         function setArticleFlag( $v ) {
 187                 $this->mIsarticle = $v;
 188                 if ( $v ) {
 189                         $this->mIsArticleRelated = $v;
 190                 }
 191         }
 192
 193         function isArticleRelated() { return $this->mIsArticleRelated; }
 194
 195         function getLanguageLinks() { return $this->mLanguageLinks; }
 196         function addLanguageLinks($newLinkArray) {
 197                 $this->mLanguageLinks += $newLinkArray;
 198         }
 199         function setLanguageLinks($newLinkArray) {
 200                 $this->mLanguageLinks = $newLinkArray;
 201         }
 202
 203         function getCategoryLinks() {
 204                 return $this->mCategoryLinks;
 205         }
 206         function addCategoryLinks($newLinkArray) {
 207                 $this->mCategoryLinks += $newLinkArray;
 208         }
 209         function setCategoryLinks($newLinkArray) {
 210                 $this->mCategoryLinks += $newLinkArray;
 211         }
 212
 213         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 214         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 215
 216         function addHTML( $text ) { $this->mBodytext .= $text; }
 217         function clearHTML() { $this->mBodytext = ''; }
 218         function debug( $text ) { $this->mDebugtext .= $text; }
 219
 220         function setParserOptions( $options ) {
 221                 return wfSetVar( $this->mParserOptions, $options );
 222         }
 223
 224         /**
 225          * Convert wikitext to HTML and add it to the buffer
 226          */
 227         function addWikiText( $text, $linestart = true ) {
 228                 global $wgParser, $wgTitle, $wgUseTidy;
 229
 230                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 231                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 232                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 233                 $this->addHTML( $parserOutput->getText() );
 234         }
 235
 236         /**
 237          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 238          * Saves the text into the parser cache if possible
 239          */
 240         function addPrimaryWikiText( $text, $cacheArticle ) {
 241                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 242
 243                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 244
 245                 $text = $parserOutput->getText();
 246
 247                 if ( $cacheArticle ) {
 248                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 249                 }
 250
 251                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 252                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 253                 $this->addHTML( $text );
 254         }
 255
 256         /**
 257          * Add the output of a QuickTemplate to the output buffer
 258          * @param QuickTemplate $template
 259          */
 260         function addTemplate( &$template ) {
 261                 ob_start();
 262                 $template->execute();
 263                 $this->addHtml( ob_get_contents() );
 264                 ob_end_clean();
 265         }
 266
 267         /**
 268          * Parse wikitext and return the HTML. This is for special pages that add the text later
 269          */
 270         function parse( $text, $linestart = true ) {
 271                 global $wgParser, $wgTitle;
 272                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 273                 return $parserOutput->getText();
 274         }
 275
 276         /**
 277          * @param $article
 278          * @param $user
 279          */
 280         function tryParserCache( $article, $user ) {
 281                 global $wgParserCache;
 282                 $parserOutput = $wgParserCache->get( $article, $user );
 283                 if ( $parserOutput !== false ) {
 284                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 285                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 286                         $this->addHTML( $parserOutput->getText() );
 287                         return true;
 288                 } else {
 289                         return false;
 290                 }
 291         }
 292
 293         /**
 294          * Set the maximum cache time on the Squid in seconds
 295          * @param $maxage
 296          */
 297         function setSquidMaxage( $maxage ) {
 298                 $this->mSquidMaxage = $maxage;
 299         }
 300
 301         /**
 302          * Use enableClientCache(false) to force it to send nocache headers
 303          * @param $state
 304          */
 305         function enableClientCache( $state ) {
 306                 return wfSetVar( $this->mEnableClientCache, $state );
 307         }
 308
 309         function sendCacheControl() {
 310                 global $wgUseSquid, $wgUseESI;
 311                 # FIXME: This header may cause trouble with some versions of Internet Explorer
 312                 header( 'Vary: Accept-Encoding, Cookie' );
 313                 if( $this->mEnableClientCache ) {
 314                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 315                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 316                         {
 317                                 if ( $wgUseESI ) {
 318                                         # We'll purge the proxy cache explicitly, but require end user agents
 319                                         # to revalidate against the proxy on each visit.
 320                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 321                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 322                                         # start with a shorter timeout for initial testing
 323                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 324                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 325                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 326                                 } else {
 327                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 328                                         # to revalidate against the proxy on each visit.
 329                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 330                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 331                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 332                                         # start with a shorter timeout for initial testing
 333                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 334                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 335                                 }
 336                         } else {
 337                                 # We do want clients to cache if they can, but they *must* check for updates
 338                                 # on revisiting the page.
 339                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 340                                 header( "Expires: -1" );
 341                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 342                         }
 343                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 344                 } else {
 345                         wfDebug( "** no caching **\n", false );
 346
 347                         # In general, the absence of a last modified header should be enough to prevent
 348                         # the client from using its cache. We send a few other things just to make sure.
 349                         header( 'Expires: -1' );
 350                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 351                         header( 'Pragma: no-cache' );
 352                 }
 353         }
 354
 355         /**
 356          * Finally, all the text has been munged and accumulated into
 357          * the object, let's actually output it:
 358          */
 359         function output() {
 360                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 361                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 362                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 363
 364                 if( $this->mDoNothing ){
 365                         return;
 366                 }
 367                 $fname = 'OutputPage::output';
 368                 wfProfileIn( $fname );
 369                 $sk = $wgUser->getSkin();
 370
 371                 if ( '' != $this->mRedirect ) {
 372                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 373                                 # Standards require redirect URLs to be absolute
 374                                 global $wgServer;
 375                                 $this->mRedirect = $wgServer . $this->mRedirect;
 376                         }
 377                         if( $this->mRedirectCode == '301') {
 378                                 if( !$wgDebugRedirects ) {
 379                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 380                                 }
 381                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 382                         }
 383
 384                         $this->sendCacheControl();
 385
 386                         if( $wgDebugRedirects ) {
 387                                 $url = htmlspecialchars( $this->mRedirect );
 388                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 389                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 390                                 print "</body>\n</html>\n";
 391                         } else {
 392                                 header( 'Location: '.$this->mRedirect );
 393                         }
 394                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 395                         return;
 396                 }
 397
 398
 399                 # Buffer output; final headers may depend on later processing
 400                 ob_start();
 401
 402                 $this->transformBuffer();
 403
 404                 # Disable temporary placeholders, so that the skin produces HTML
 405                 $sk->postParseLinkColour( false );
 406
 407                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 408                 header( 'Content-language: '.$wgContLanguageCode );
 409
 410                 $exp = time() + $wgCookieExpiration;
 411                 foreach( $this->mCookies as $name => $val ) {
 412                         setcookie( $name, $val, $exp, '/' );
 413                 }
 414
 415                 wfProfileIn( 'Output-skin' );
 416                 $sk->outputPage( $this );
 417                 wfProfileOut( 'Output-skin' );
 418
 419                 $this->sendCacheControl();
 420                 ob_end_flush();
 421         }
 422
 423         function out( $ins ) {
 424                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 425                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 426                         $outs = $ins;
 427                 } else {
 428                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 429                         if ( false === $outs ) { $outs = $ins; }
 430                 }
 431                 print $outs;
 432         }
 433
 434         function setEncodings() {
 435                 global $wgInputEncoding, $wgOutputEncoding;
 436                 global $wgUser, $wgContLang;
 437
 438                 $wgInputEncoding = strtolower( $wgInputEncoding );
 439
 440                 if( $wgUser->getOption( 'altencoding' ) ) {
 441                         $wgContLang->setAltEncoding();
 442                         return;
 443                 }
 444
 445                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 446                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 447                         return;
 448                 }
 449
 450                 /*
 451                 # This code is unused anyway!
 452                 # Commenting out. --bv 2003-11-15
 453
 454                 $a = explode( ",", $_SERVER['HTTP_ACCEPT_CHARSET'] );
 455                 $best = 0.0;
 456                 $bestset = "*";
 457
 458                 foreach ( $a as $s ) {
 459                         if ( preg_match( "/(.*);q=(.*)/", $s, $m ) ) {
 460                                 $set = $m[1];
 461                                 $q = (float)($m[2]);
 462                         } else {
 463                                 $set = $s;
 464                                 $q = 1.0;
 465                         }
 466                         if ( $q > $best ) {
 467                                 $bestset = $set;
 468                                 $best = $q;
 469                         }
 470                 }
 471                 #if ( "*" == $bestset ) { $bestset = "iso-8859-1"; }
 472                 if ( "*" == $bestset ) { $bestset = $wgOutputEncoding; }
 473                 $wgOutputEncoding = strtolower( $bestset );
 474
 475 # Disable for now
 476 #
 477                 */
 478                 $wgOutputEncoding = $wgInputEncoding;
 479         }
 480
 481         /**
 482          * Returns a HTML comment with the elapsed time since request.
 483          * This method has no side effects.
 484          */
 485         function reportTime() {
 486                 global $wgRequestTime;
 487
 488                 $now = wfTime();
 489                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 490                 $start = (float)$sec + (float)$usec;
 491                 $elapsed = $now - $start;
 492
 493                 # Use real server name if available, so we know which machine
 494                 # in a server farm generated the current page.
 495                 if ( function_exists( 'posix_uname' ) ) {
 496                         $uname = @posix_uname();
 497                 } else {
 498                         $uname = false;
 499                 }
 500                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 501                         $hostname = $uname['nodename'];
 502                 } else {
 503                         # This may be a virtual server.
 504                         $hostname = $_SERVER['SERVER_NAME'];
 505                 }
 506                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 507                   $hostname, $elapsed );
 508                 return $com;
 509         }
 510
 511         /**
 512          * Note: these arguments are keys into wfMsg(), not text!
 513          */
 514         function errorpage( $title, $msg ) {
 515                 global $wgTitle;
 516
 517                 $this->mDebugtext .= 'Original title: ' .
 518                   $wgTitle->getPrefixedText() . "\n";
 519                 $this->setPageTitle( wfMsg( $title ) );
 520                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 521                 $this->setRobotpolicy( 'noindex,nofollow' );
 522                 $this->setArticleRelated( false );
 523                 $this->enableClientCache( false );
 524                 $this->mRedirect = '';
 525
 526                 $this->mBodytext = '';
 527                 $this->addHTML( '<p>' . wfMsg( $msg ) . "</p>\n" );
 528                 $this->returnToMain( false );
 529
 530                 $this->output();
 531                 wfErrorExit();
 532         }
 533
 534         function sysopRequired() {
 535                 global $wgUser;
 536
 537                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 538                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 539                 $this->setRobotpolicy( 'noindex,nofollow' );
 540                 $this->setArticleRelated( false );
 541                 $this->mBodytext = '';
 542
 543                 $sk = $wgUser->getSkin();
 544                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 545                 $this->addHTML( wfMsg( 'sysoptext', $ap ) );
 546                 $this->returnToMain();
 547         }
 548
 549         function developerRequired() {
 550                 global $wgUser;
 551
 552                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 553                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 554                 $this->setRobotpolicy( 'noindex,nofollow' );
 555                 $this->setArticleRelated( false );
 556                 $this->mBodytext = '';
 557
 558                 $sk = $wgUser->getSkin();
 559                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 560                 $this->addHTML( wfMsg( 'developertext', $ap ) );
 561                 $this->returnToMain();
 562         }
 563
 564         function loginToUse() {
 565                 global $wgUser, $wgTitle, $wgContLang;
 566
 567                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 568                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 569                 $this->setRobotpolicy( 'noindex,nofollow' );
 570                 $this->setArticleFlag( false );
 571                 $this->mBodytext = '';
 572                 $this->addWikiText( wfMsg( 'loginreqtext' ) );
 573
 574                 # We put a comment in the .html file so a Sysop can diagnose the page the
 575                 # user can't see.
 576                 $this->addHTML( "\n<!--" .
 577                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 578                                                 ':' .
 579                                                 $wgTitle->getDBkey() . '-->' );
 580                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 581         }
 582
 583         function databaseError( $fname, $sql, $error, $errno ) {
 584                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 585
 586                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 587                 $this->setRobotpolicy( 'noindex,nofollow' );
 588                 $this->setArticleRelated( false );
 589                 $this->enableClientCache( false );
 590                 $this->mRedirect = '';
 591
 592                 if( $wgShowSQLErrors ) {
 593                         if ( $wgCommandLineMode ) {
 594                                 $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 595                                                         htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 596                         } else {
 597                                 $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 598                                                         htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 599                         }
 600                 } else {
 601                         if( $wgCommandLineMode ) {
 602                                 $msg = wfMsg( 'internalerror' );
 603                         } else {
 604                                 $msg = htmlspecialchars( wfMsg( 'internalerror' ) );
 605                         }
 606                 }
 607
 608                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 609                         print $msg."\n";
 610                         wfErrorExit();
 611                 }
 612                 $this->mBodytext = $msg;
 613                 $this->output();
 614                 wfErrorExit();
 615         }
 616
 617         function readOnlyPage( $source = null, $protected = false ) {
 618                 global $wgUser, $wgReadOnlyFile;
 619
 620                 $this->setRobotpolicy( 'noindex,nofollow' );
 621                 $this->setArticleRelated( false );
 622
 623                 if( $protected ) {
 624                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 625                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 626                 } else {
 627                         $this->setPageTitle( wfMsg( 'readonly' ) );
 628                         $reason = file_get_contents( $wgReadOnlyFile );
 629                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 630                 }
 631
 632                 if( is_string( $source ) ) {
 633                         if( strcmp( $source, '' ) == 0 ) {
 634                                 $source = wfMsg( 'noarticletext' );
 635                         }
 636                         $rows = $wgUser->getOption( 'rows' );
 637                         $cols = $wgUser->getOption( 'cols' );
 638                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 639                                 htmlspecialchars( $source ) . "\n</textarea>";
 640                         $this->addHTML( $text );
 641                 }
 642
 643                 $this->returnToMain( false );
 644         }
 645
 646         function fatalError( $message ) {
 647                 $this->setPageTitle( wfMsg( "internalerror" ) );
 648                 $this->setRobotpolicy( "noindex,nofollow" );
 649                 $this->setArticleRelated( false );
 650                 $this->enableClientCache( false );
 651                 $this->mRedirect = '';
 652
 653                 $this->mBodytext = $message;
 654                 $this->output();
 655                 wfErrorExit();
 656         }
 657
 658         function unexpectedValueError( $name, $val ) {
 659                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 660         }
 661
 662         function fileCopyError( $old, $new ) {
 663                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 664         }
 665
 666         function fileRenameError( $old, $new ) {
 667                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 668         }
 669
 670         function fileDeleteError( $name ) {
 671                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 672         }
 673
 674         function fileNotFoundError( $name ) {
 675                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 676         }
 677
 678         /**
 679          * return from error messages or notes
 680          * @param $auto automatically redirect the user after 10 seconds
 681          * @param $returnto page title to return to. Default is Main Page.
 682          */
 683         function returnToMain( $auto = true, $returnto = NULL ) {
 684                 global $wgUser, $wgOut, $wgRequest;
 685
 686                 if ( $returnto == NULL ) {
 687                         $returnto = $wgRequest->getText( 'returnto' );
 688                 }
 689                 $returnto = htmlspecialchars( $returnto );
 690
 691                 $sk = $wgUser->getSkin();
 692                 if ( '' == $returnto ) {
 693                         $returnto = wfMsgForContent( 'mainpage' );
 694                 }
 695                 $link = $sk->makeKnownLink( $returnto, '' );
 696
 697                 $r = wfMsg( 'returnto', $link );
 698                 if ( $auto ) {
 699                         $titleObj = Title::newFromText( $returnto );
 700                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 701                 }
 702                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 703         }
 704
 705         /**
 706          * This function takes the existing and broken links for the page
 707          * and uses the first 10 of them for META keywords
 708          */
 709         function addMetaTags () {
 710                 global $wgLinkCache , $wgOut ;
 711                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 712                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 713                 $a = array_merge ( $good , $bad ) ;
 714                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 715                 $a = implode ( ',' , $a ) ;
 716                 $strip = array(
 717                         "/<.*?" . ">/" => '',
 718                         "/[_]/" => ' '
 719                 );
 720                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 721
 722                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 723         }
 724
 725         /**
 726          * @private
 727          */
 728         function headElement() {
 729                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 730                 global $wgUser, $wgContLang, $wgRequest;
 731
 732                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 733                         $ret = "<" . "?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?" . ">\n";
 734                 } else {
 735                         $ret = '';
 736                 }
 737
 738                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 739
 740                 if ( "" == $this->mHTMLtitle ) {
 741                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 742                 }
 743
 744                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 745                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 746                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 747                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 748
 749                 $ret .= $this->getHeadLinks();
 750                 global $wgStylePath;
 751                 if( $this->isPrintable() ) {
 752                         $media = '';
 753                 } else {
 754                         $media = "media='print'";
 755                 }
 756                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 757                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 758
 759                 $sk = $wgUser->getSkin();
 760                 $ret .= $sk->getHeadScripts();
 761                 $ret .= $this->mScripts;
 762                 $ret .= $sk->getUserStyles();
 763
 764                 $ret .= "</head>\n";
 765                 return $ret;
 766         }
 767
 768         function getHeadLinks() {
 769                 global $wgRequest, $wgStylePath;
 770                 $ret = '';
 771                 foreach ( $this->mMetatags as $tag ) {
 772                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 773                                 $a = 'http-equiv';
 774                                 $tag[0] = substr( $tag[0], 5 );
 775                         } else {
 776                                 $a = 'name';
 777                         }
 778                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 779                 }
 780                 $p = $this->mRobotpolicy;
 781                 if ( '' == $p ) { $p = 'index,follow'; }
 782                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 783
 784                 if ( count( $this->mKeywords ) > 0 ) {
 785                         $strip = array(
 786                                 "/<.*?" . ">/" => '',
 787                                 "/[_]/" => ' '
 788                         );
 789                         $ret .= "<meta name=\"keywords\" content=\"" .
 790                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 791                 }
 792                 foreach ( $this->mLinktags as $tag ) {
 793                         $ret .= '<link';
 794                         foreach( $tag as $attr => $val ) {
 795                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 796                         }
 797                         $ret .= " />\n";
 798                 }
 799                 if( $this->isSyndicated() ) {
 800                         # FIXME: centralize the mime-type and name information in Feed.php
 801                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 802                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 803                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 804                         $ret .= "<link rel='alternate' type='application/rss+atom' title='Atom 0.3' href='$link' />\n";
 805                 }
 806
 807                 return $ret;
 808         }
 809
 810         /**
 811          * Run any necessary pre-output transformations on the buffer text
 812          */
 813         function transformBuffer( $options = 0 ) {
 814         }
 815
 816
 817 }
 818
 819 }
 820
 821 ?>