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;
  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         }
  59
  60         function addHeader( $name, $val ) { array_push( $this->mHeaders, $name.': '.$val ) ; }
  61         function addCookie( $name, $val ) { array_push( $this->mCookies, array( $name, $val ) ); }
  62         function redirect( $url, $responsecode = '302' ) { $this->mRedirect = $url; $this->mRedirectCode = $responsecode; }
  63
  64         # To add an http-equiv meta tag, precede the name with "http:"
  65         function addMeta( $name, $val ) { array_push( $this->mMetatags, array( $name, $val ) ); }
  66         function addKeyword( $text ) { array_push( $this->mKeywords, $text ); }
  67         function addScript( $script ) { $this->mScripts .= $script; }
  68         function getScript() { return $this->mScripts; }
  69
  70         function setETag($tag) { $this->mETag = $tag; }
  71         function setArticleBodyOnly($only) { $this->mArticleBodyOnly = $only; }
  72         function getArticleBodyOnly($only) { return $this->mArticleBodyOnly; }
  73
  74         function addLink( $linkarr ) {
  75                 # $linkarr should be an associative array of attributes. We'll escape on output.
  76                 array_push( $this->mLinktags, $linkarr );
  77         }
  78
  79         function addMetadataLink( $linkarr ) {
  80                 # note: buggy CC software only reads first "meta" link
  81                 static $haveMeta = false;
  82                 $linkarr['rel'] = ($haveMeta) ? 'alternate meta' : 'meta';
  83                 $this->addLink( $linkarr );
  84                 $haveMeta = true;
  85         }
  86
  87         /**
  88          * checkLastModified tells the client to use the client-cached page if
  89          * possible. If sucessful, the OutputPage is disabled so that
  90          * any future call to OutputPage->output() have no effect. The method
  91          * returns true iff cache-ok headers was sent.
  92          */
  93         function checkLastModified ( $timestamp ) {
  94                 global $wgLang, $wgCachePages, $wgUser;
  95                 if ( !$timestamp || $timestamp == '19700101000000' ) {
  96                         wfDebug( "CACHE DISABLED, NO TIMESTAMP\n" );
  97                         return;
  98                 }
  99                 if( !$wgCachePages ) {
 100                         wfDebug( "CACHE DISABLED\n", false );
 101                         return;
 102                 }
 103                 if( $wgUser->getOption( 'nocache' ) ) {
 104                         wfDebug( "USER DISABLED CACHE\n", false );
 105                         return;
 106                 }
 107
 108                 $timestamp=wfTimestamp(TS_MW,$timestamp);
 109                 $lastmod = wfTimestamp( TS_RFC2822, max( $timestamp, $wgUser->mTouched ) );
 110
 111                 if( !empty( $_SERVER['HTTP_IF_MODIFIED_SINCE'] ) ) {
 112                         # IE sends sizes after the date like this:
 113                         # Wed, 20 Aug 2003 06:51:19 GMT; length=5202
 114                         # this breaks strtotime().
 115                         $modsince = preg_replace( '/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"] );
 116                         $modsinceTime = strtotime( $modsince );
 117                         $ismodsince = wfTimestamp( TS_MW, $modsinceTime ? $modsinceTime : 1 );
 118                         wfDebug( "-- client send If-Modified-Since: " . $modsince . "\n", false );
 119                         wfDebug( "--  we might send Last-Modified : $lastmod\n", false );
 120                         if( ($ismodsince >= $timestamp ) && $wgUser->validateCache( $ismodsince ) ) {
 121                                 # Make sure you're in a place you can leave when you call us!
 122                                 header( "HTTP/1.0 304 Not Modified" );
 123                                 $this->mLastModified = $lastmod;
 124                                 $this->sendCacheControl();
 125                                 wfDebug( "CACHED client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 126                                 $this->disable();
 127                                 @ob_end_clean(); // Don't output compressed blob
 128                                 return true;
 129                         } else {
 130                                 wfDebug( "READY  client: $ismodsince ; user: $wgUser->mTouched ; page: $timestamp\n", false );
 131                                 $this->mLastModified = $lastmod;
 132                         }
 133                 } else {
 134                         wfDebug( "client did not send If-Modified-Since header\n", false );
 135                         $this->mLastModified = $lastmod;
 136                 }
 137         }
 138
 139         function getPageTitleActionText () {
 140                 global $action;
 141                 switch($action) {
 142                         case 'edit':
 143                                 return wfMsg('edit');
 144                         case 'history':
 145                                 return wfMsg('history_short');
 146                         case 'protect':
 147                                 return wfMsg('protect');
 148                         case 'unprotect':
 149                                 return wfMsg('unprotect');
 150                         case 'delete':
 151                                 return wfMsg('delete');
 152                         case 'watch':
 153                                 return wfMsg('watch');
 154                         case 'unwatch':
 155                                 return wfMsg('unwatch');
 156                         case 'submit':
 157                                 return wfMsg('preview');
 158                         case 'info':
 159                                 return wfMsg('info_short');
 160                         default:
 161                                 return '';
 162                 }
 163         }
 164
 165         function setRobotpolicy( $str ) { $this->mRobotpolicy = $str; }
 166         function setHTMLTitle( $name ) {$this->mHTMLtitle = $name; }
 167         function setPageTitle( $name ) {
 168                 global $action, $wgContLang;
 169                 $name = $wgContLang->convert($name, true);
 170                 $this->mPagetitle = $name;
 171                 if(!empty($action)) {
 172                         $taction =  $this->getPageTitleActionText();
 173                         if( !empty( $taction ) ) {
 174                                 $name .= ' - '.$taction;
 175                         }
 176                 }
 177                 $this->setHTMLTitle( $name . ' - ' . wfMsg( 'wikititlesuffix' ) );
 178         }
 179         function getHTMLTitle() { return $this->mHTMLtitle; }
 180         function getPageTitle() { return $this->mPagetitle; }
 181         function setSubtitle( $str ) { $this->mSubtitle = /*$this->parse(*/$str/*)*/; } // @bug 2514
 182         function getSubtitle() { return $this->mSubtitle; }
 183         function isArticle() { return $this->mIsarticle; }
 184         function setPrintable() { $this->mPrintable = true; }
 185         function isPrintable() { return $this->mPrintable; }
 186         function setSyndicated( $show = true ) { $this->mShowFeedLinks = $show; }
 187         function isSyndicated() { return $this->mShowFeedLinks; }
 188         function setOnloadHandler( $js ) { $this->mOnloadHandler = $js; }
 189         function getOnloadHandler() { return $this->mOnloadHandler; }
 190         function disable() { $this->mDoNothing = true; }
 191
 192         function setArticleRelated( $v ) {
 193                 $this->mIsArticleRelated = $v;
 194                 if ( !$v ) {
 195                         $this->mIsarticle = false;
 196                 }
 197         }
 198         function setArticleFlag( $v ) {
 199                 $this->mIsarticle = $v;
 200                 if ( $v ) {
 201                         $this->mIsArticleRelated = $v;
 202                 }
 203         }
 204
 205         function isArticleRelated() { return $this->mIsArticleRelated; }
 206
 207         function getLanguageLinks() { return $this->mLanguageLinks; }
 208         function addLanguageLinks($newLinkArray) {
 209                 $this->mLanguageLinks += $newLinkArray;
 210         }
 211         function setLanguageLinks($newLinkArray) {
 212                 $this->mLanguageLinks = $newLinkArray;
 213         }
 214
 215         function getCategoryLinks() {
 216                 return $this->mCategoryLinks;
 217         }
 218         function addCategoryLinks($newLinkArray) {
 219                 $this->mCategoryLinks += $newLinkArray;
 220         }
 221         function setCategoryLinks($newLinkArray) {
 222                 $this->mCategoryLinks += $newLinkArray;
 223         }
 224
 225         function suppressQuickbar() { $this->mSuppressQuickbar = true; }
 226         function isQuickbarSuppressed() { return $this->mSuppressQuickbar; }
 227
 228         function addHTML( $text ) { $this->mBodytext .= $text; }
 229         function clearHTML() { $this->mBodytext = ''; }
 230         function getHTML() { return $this->mBodytext; }
 231         function debug( $text ) { $this->mDebugtext .= $text; }
 232
 233         function setParserOptions( $options ) {
 234                 return wfSetVar( $this->mParserOptions, $options );
 235         }
 236
 237         /**
 238          * Convert wikitext to HTML and add it to the buffer
 239          * Default assumes that the current page title will
 240          * be used.
 241          */
 242         function addWikiText( $text, $linestart = true ) {
 243                 global $wgTitle;
 244                 $this->addWikiTextTitle($text, $wgTitle, $linestart);
 245         }
 246
 247         function addWikiTextWithTitle($text, &$title, $linestart = true) {
 248                 $this->addWikiTextTitle($text, $title, $linestart);
 249         }
 250
 251         function addWikiTextTitle($text, &$title, $linestart) {
 252                 global $wgParser, $wgUseTidy;
 253                 $parserOutput = $wgParser->parse( $text, $title, $this->mParserOptions, $linestart );
 254                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 255                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 256                 if ( $parserOutput->getCacheTime() == -1 ) {
 257                         $this->enableClientCache( false );
 258                 }
 259                 $this->addHTML( $parserOutput->getText() );
 260         }
 261
 262         /**
 263          * Add wikitext to the buffer, assuming that this is the primary text for a page view
 264          * Saves the text into the parser cache if possible
 265          */
 266         function addPrimaryWikiText( $text, $cacheArticle ) {
 267                 global $wgParser, $wgParserCache, $wgUser, $wgTitle, $wgUseTidy;
 268
 269                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, true );
 270
 271                 $text = $parserOutput->getText();
 272
 273                 if ( $cacheArticle && $parserOutput->getCacheTime() != -1 ) {
 274                         $wgParserCache->save( $parserOutput, $cacheArticle, $wgUser );
 275                 }
 276
 277                 $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 278                 $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 279                 if ( $parserOutput->getCacheTime() == -1 ) {
 280                         $this->enableClientCache( false );
 281                 }
 282                 $this->addHTML( $text );
 283         }
 284
 285         /**
 286          * Add the output of a QuickTemplate to the output buffer
 287          * @param QuickTemplate $template
 288          */
 289         function addTemplate( &$template ) {
 290                 ob_start();
 291                 $template->execute();
 292                 $this->addHtml( ob_get_contents() );
 293                 ob_end_clean();
 294         }
 295
 296         /**
 297          * Parse wikitext and return the HTML. This is for special pages that add the text later
 298          */
 299         function parse( $text, $linestart = true ) {
 300                 global $wgParser, $wgTitle;
 301                 $parserOutput = $wgParser->parse( $text, $wgTitle, $this->mParserOptions, $linestart );
 302                 return $parserOutput->getText();
 303         }
 304
 305         /**
 306          * @param $article
 307          * @param $user
 308          *
 309          * @return bool
 310          */
 311         function tryParserCache( $article, $user ) {
 312                 global $wgParserCache;
 313                 $parserOutput = $wgParserCache->get( $article, $user );
 314                 if ( $parserOutput !== false ) {
 315                         $this->mLanguageLinks += $parserOutput->getLanguageLinks();
 316                         $this->mCategoryLinks += $parserOutput->getCategoryLinks();
 317                         $this->addHTML( $parserOutput->getText() );
 318                         $t = $parserOutput->getTitleText();
 319                         if( !empty( $t ) ) {
 320                                 $this->setPageTitle( $t );
 321                         }
 322                         return true;
 323                 } else {
 324                         return false;
 325                 }
 326         }
 327
 328         /**
 329          * Set the maximum cache time on the Squid in seconds
 330          * @param $maxage
 331          */
 332         function setSquidMaxage( $maxage ) {
 333                 $this->mSquidMaxage = $maxage;
 334         }
 335
 336         /**
 337          * Use enableClientCache(false) to force it to send nocache headers
 338          * @param $state
 339          */
 340         function enableClientCache( $state ) {
 341                 return wfSetVar( $this->mEnableClientCache, $state );
 342         }
 343
 344         function uncacheableBecauseRequestvars() {
 345                 global $wgRequest;
 346                 return  $wgRequest->getText('useskin', false) === false
 347                         && $wgRequest->getText('uselang', false) === false;
 348         }
 349
 350         function sendCacheControl() {
 351                 global $wgUseSquid, $wgUseESI;
 352
 353                 if ($this->mETag)
 354                         header("ETag: $this->mETag");
 355
 356                 # don't serve compressed data to clients who can't handle it
 357                 # maintain different caches for logged-in users and non-logged in ones
 358                 header( 'Vary: Accept-Encoding, Cookie' );
 359                 if( !$this->uncacheableBecauseRequestvars() && $this->mEnableClientCache ) {
 360                         if( $wgUseSquid && ! isset( $_COOKIE[ini_get( 'session.name') ] ) &&
 361                           ! $this->isPrintable() && $this->mSquidMaxage != 0 )
 362                         {
 363                                 if ( $wgUseESI ) {
 364                                         # We'll purge the proxy cache explicitly, but require end user agents
 365                                         # to revalidate against the proxy on each visit.
 366                                         # Surrogate-Control controls our Squid, Cache-Control downstream caches
 367                                         wfDebug( "** proxy caching with ESI; {$this->mLastModified} **\n", false );
 368                                         # start with a shorter timeout for initial testing
 369                                         # header( 'Surrogate-Control: max-age=2678400+2678400, content="ESI/1.0"');
 370                                         header( 'Surrogate-Control: max-age='.$wgSquidMaxage.'+'.$this->mSquidMaxage.', content="ESI/1.0"');
 371                                         header( 'Cache-Control: s-maxage=0, must-revalidate, max-age=0' );
 372                                 } else {
 373                                         # We'll purge the proxy cache for anons explicitly, but require end user agents
 374                                         # to revalidate against the proxy on each visit.
 375                                         # IMPORTANT! The Squid needs to replace the Cache-Control header with
 376                                         # Cache-Control: s-maxage=0, must-revalidate, max-age=0
 377                                         wfDebug( "** local proxy caching; {$this->mLastModified} **\n", false );
 378                                         # start with a shorter timeout for initial testing
 379                                         # header( "Cache-Control: s-maxage=2678400, must-revalidate, max-age=0" );
 380                                         header( 'Cache-Control: s-maxage='.$this->mSquidMaxage.', must-revalidate, max-age=0' );
 381                                 }
 382                         } else {
 383                                 # We do want clients to cache if they can, but they *must* check for updates
 384                                 # on revisiting the page.
 385                                 wfDebug( "** private caching; {$this->mLastModified} **\n", false );
 386                                 header( "Expires: -1" );
 387                                 header( "Cache-Control: private, must-revalidate, max-age=0" );
 388                         }
 389                         if($this->mLastModified) header( "Last-modified: {$this->mLastModified}" );
 390                 } else {
 391                         wfDebug( "** no caching **\n", false );
 392
 393                         # In general, the absence of a last modified header should be enough to prevent
 394                         # the client from using its cache. We send a few other things just to make sure.
 395                         header( 'Expires: -1' );
 396                         header( 'Cache-Control: no-cache, no-store, max-age=0, must-revalidate' );
 397                         header( 'Pragma: no-cache' );
 398                 }
 399         }
 400
 401         /**
 402          * Finally, all the text has been munged and accumulated into
 403          * the object, let's actually output it:
 404          */
 405         function output() {
 406                 global $wgUser, $wgLang, $wgDebugComments, $wgCookieExpiration;
 407                 global $wgInputEncoding, $wgOutputEncoding, $wgContLanguageCode;
 408                 global $wgDebugRedirects, $wgMimeType, $wgProfiler;
 409
 410                 if( $this->mDoNothing ){
 411                         return;
 412                 }
 413                 $fname = 'OutputPage::output';
 414                 wfProfileIn( $fname );
 415                 $sk = $wgUser->getSkin();
 416
 417                 if ( '' != $this->mRedirect ) {
 418                         if( substr( $this->mRedirect, 0, 4 ) != 'http' ) {
 419                                 # Standards require redirect URLs to be absolute
 420                                 global $wgServer;
 421                                 $this->mRedirect = $wgServer . $this->mRedirect;
 422                         }
 423                         if( $this->mRedirectCode == '301') {
 424                                 if( !$wgDebugRedirects ) {
 425                                         header("HTTP/1.1 {$this->mRedirectCode} Moved Permanently");
 426                                 }
 427                                 $this->mLastModified = wfTimestamp( TS_RFC2822 );
 428                         }
 429
 430                         $this->sendCacheControl();
 431
 432                         if( $wgDebugRedirects ) {
 433                                 $url = htmlspecialchars( $this->mRedirect );
 434                                 print "<html>\n<head>\n<title>Redirect</title>\n</head>\n<body>\n";
 435                                 print "<p>Location: <a href=\"$url\">$url</a></p>\n";
 436                                 print "</body>\n</html>\n";
 437                         } else {
 438                                 header( 'Location: '.$this->mRedirect );
 439                         }
 440                         if ( isset( $wgProfiler ) ) { wfDebug( $wgProfiler->getOutput() ); }
 441                         wfProfileOut( $fname );
 442                         return;
 443                 }
 444
 445
 446                 # Buffer output; final headers may depend on later processing
 447                 ob_start();
 448
 449                 $this->transformBuffer();
 450
 451                 # Disable temporary placeholders, so that the skin produces HTML
 452                 $sk->postParseLinkColour( false );
 453
 454                 header( "Content-type: $wgMimeType; charset={$wgOutputEncoding}" );
 455                 header( 'Content-language: '.$wgContLanguageCode );
 456
 457                 $exp = time() + $wgCookieExpiration;
 458                 foreach( $this->mCookies as $name => $val ) {
 459                         setcookie( $name, $val, $exp, '/' );
 460                 }
 461
 462                 if ($this->mArticleBodyOnly) {
 463                         $this->out($this->mBodytext);
 464                 } else {
 465                         wfProfileIn( 'Output-skin' );
 466                         $sk->outputPage( $this );
 467                         wfProfileOut( 'Output-skin' );
 468                 }
 469
 470                 $this->sendCacheControl();
 471                 ob_end_flush();
 472                 wfProfileOut( $fname );
 473         }
 474
 475         function out( $ins ) {
 476                 global $wgInputEncoding, $wgOutputEncoding, $wgContLang;
 477                 if ( 0 == strcmp( $wgInputEncoding, $wgOutputEncoding ) ) {
 478                         $outs = $ins;
 479                 } else {
 480                         $outs = $wgContLang->iconv( $wgInputEncoding, $wgOutputEncoding, $ins );
 481                         if ( false === $outs ) { $outs = $ins; }
 482                 }
 483                 print $outs;
 484         }
 485
 486         function setEncodings() {
 487                 global $wgInputEncoding, $wgOutputEncoding;
 488                 global $wgUser, $wgContLang;
 489
 490                 $wgInputEncoding = strtolower( $wgInputEncoding );
 491
 492                 if( $wgUser->getOption( 'altencoding' ) ) {
 493                         $wgContLang->setAltEncoding();
 494                         return;
 495                 }
 496
 497                 if ( empty( $_SERVER['HTTP_ACCEPT_CHARSET'] ) ) {
 498                         $wgOutputEncoding = strtolower( $wgOutputEncoding );
 499                         return;
 500                 }
 501                 $wgOutputEncoding = $wgInputEncoding;
 502         }
 503
 504         /**
 505          * Returns a HTML comment with the elapsed time since request.
 506          * This method has no side effects.
 507          * @return string
 508          */
 509         function reportTime() {
 510                 global $wgRequestTime;
 511
 512                 $now = wfTime();
 513                 list( $usec, $sec ) = explode( ' ', $wgRequestTime );
 514                 $start = (float)$sec + (float)$usec;
 515                 $elapsed = $now - $start;
 516
 517                 # Use real server name if available, so we know which machine
 518                 # in a server farm generated the current page.
 519                 if ( function_exists( 'posix_uname' ) ) {
 520                         $uname = @posix_uname();
 521                 } else {
 522                         $uname = false;
 523                 }
 524                 if( is_array( $uname ) && isset( $uname['nodename'] ) ) {
 525                         $hostname = $uname['nodename'];
 526                 } else {
 527                         # This may be a virtual server.
 528                         $hostname = $_SERVER['SERVER_NAME'];
 529                 }
 530                 $com = sprintf( "<!-- Served by %s in %01.2f secs. -->",
 531                   $hostname, $elapsed );
 532                 return $com;
 533         }
 534
 535         /**
 536          * Note: these arguments are keys into wfMsg(), not text!
 537          */
 538         function errorpage( $title, $msg ) {
 539                 global $wgTitle;
 540
 541                 $this->mDebugtext .= 'Original title: ' .
 542                   $wgTitle->getPrefixedText() . "\n";
 543                 $this->setPageTitle( wfMsg( $title ) );
 544                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 545                 $this->setRobotpolicy( 'noindex,nofollow' );
 546                 $this->setArticleRelated( false );
 547                 $this->enableClientCache( false );
 548                 $this->mRedirect = '';
 549
 550                 $this->mBodytext = '';
 551                 $this->addWikiText( wfMsg( $msg ) );
 552                 $this->returnToMain( false );
 553
 554                 $this->output();
 555                 wfErrorExit();
 556         }
 557
 558         /**
 559          * Display an error page indicating that a given version of MediaWiki is
 560          * required to use it
 561          *
 562          * @param mixed $version The version of MediaWiki needed to use the page
 563          */
 564         function versionRequired( $version ) {
 565                 global $wgUser;
 566
 567                 $this->setPageTitle( wfMsg( 'versionrequired', $version ) );
 568                 $this->setHTMLTitle( wfMsg( 'versionrequired', $version ) );
 569                 $this->setRobotpolicy( 'noindex,nofollow' );
 570                 $this->setArticleRelated( false );
 571                 $this->mBodytext = '';
 572
 573                 $sk = $wgUser->getSkin();
 574                 $this->addWikiText( wfMsg( 'versionrequiredtext', $version ) );
 575                 $this->returnToMain();
 576         }
 577
 578         /**
 579          * Display an error page noting that a given permission bit is required.
 580          * This should generally replace the sysopRequired, developerRequired etc.
 581          * @param string $permission key required
 582          */
 583         function permissionRequired( $permission ) {
 584                 global $wgUser;
 585
 586                 $this->setPageTitle( wfMsg( 'badaccess' ) );
 587                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 588                 $this->setRobotpolicy( 'noindex,nofollow' );
 589                 $this->setArticleRelated( false );
 590                 $this->mBodytext = '';
 591
 592                 $sk = $wgUser->getSkin();
 593                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ) );
 594                 $this->addHTML( wfMsgHtml( 'badaccesstext', $ap, $permission ) );
 595                 $this->returnToMain();
 596         }
 597
 598         /**
 599          * @deprecated
 600          */
 601         function sysopRequired() {
 602                 global $wgUser;
 603
 604                 $this->setPageTitle( wfMsg( 'sysoptitle' ) );
 605                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 606                 $this->setRobotpolicy( 'noindex,nofollow' );
 607                 $this->setArticleRelated( false );
 608                 $this->mBodytext = '';
 609
 610                 $sk = $wgUser->getSkin();
 611                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 612                 $this->addHTML( wfMsgHtml( 'sysoptext', $ap ) );
 613                 $this->returnToMain();
 614         }
 615
 616         /**
 617          * @deprecated
 618          */
 619         function developerRequired() {
 620                 global $wgUser;
 621
 622                 $this->setPageTitle( wfMsg( 'developertitle' ) );
 623                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 624                 $this->setRobotpolicy( 'noindex,nofollow' );
 625                 $this->setArticleRelated( false );
 626                 $this->mBodytext = '';
 627
 628                 $sk = $wgUser->getSkin();
 629                 $ap = $sk->makeKnownLink( wfMsgForContent( 'administrators' ), '' );
 630                 $this->addHTML( wfMsgHtml( 'developertext', $ap ) );
 631                 $this->returnToMain();
 632         }
 633
 634         function loginToUse() {
 635                 global $wgUser, $wgTitle, $wgContLang;
 636
 637                 $this->setPageTitle( wfMsg( 'loginreqtitle' ) );
 638                 $this->setHTMLTitle( wfMsg( 'errorpagetitle' ) );
 639                 $this->setRobotpolicy( 'noindex,nofollow' );
 640                 $this->setArticleFlag( false );
 641                 $this->mBodytext = '';
 642                 $loginpage = Title::makeTitle(NS_SPECIAL, 'Userlogin');
 643                 $sk = $wgUser->getSkin();
 644                 $loginlink = $sk->makeKnownLinkObj($loginpage, wfMsg('loginreqlink'),
 645                         'returnto=' . htmlspecialchars($wgTitle->getPrefixedDBkey()));
 646                 $this->addHTML( wfMsgHtml( 'loginreqpagetext', $loginlink ) );
 647
 648                 # We put a comment in the .html file so a Sysop can diagnose the page the
 649                 # user can't see.
 650                 $this->addHTML( "\n<!--" .
 651                                                 $wgContLang->getNsText( $wgTitle->getNamespace() ) .
 652                                                 ':' .
 653                                                 $wgTitle->getDBkey() . '-->' );
 654                 $this->returnToMain();          # Flip back to the main page after 10 seconds.
 655         }
 656
 657         function databaseError( $fname, $sql, $error, $errno ) {
 658                 global $wgUser, $wgCommandLineMode, $wgShowSQLErrors;
 659
 660                 $this->setPageTitle( wfMsgNoDB( 'databaseerror' ) );
 661                 $this->setRobotpolicy( 'noindex,nofollow' );
 662                 $this->setArticleRelated( false );
 663                 $this->enableClientCache( false );
 664                 $this->mRedirect = '';
 665
 666                 if( !$wgShowSQLErrors ) {
 667                         $sql = wfMsg( 'sqlhidden' );
 668                 }
 669
 670                 if ( $wgCommandLineMode ) {
 671                         $msg = wfMsgNoDB( 'dberrortextcl', htmlspecialchars( $sql ),
 672                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 673                 } else {
 674                         $msg = wfMsgNoDB( 'dberrortext', htmlspecialchars( $sql ),
 675                                                 htmlspecialchars( $fname ), $errno, htmlspecialchars( $error ) );
 676                 }
 677
 678                 if ( $wgCommandLineMode || !is_object( $wgUser )) {
 679                         print $msg."\n";
 680                         wfErrorExit();
 681                 }
 682                 $this->mBodytext = $msg;
 683                 $this->output();
 684                 wfErrorExit();
 685         }
 686
 687         function readOnlyPage( $source = null, $protected = false ) {
 688                 global $wgUser, $wgReadOnlyFile, $wgReadOnly;
 689
 690                 $this->setRobotpolicy( 'noindex,nofollow' );
 691                 $this->setArticleRelated( false );
 692
 693                 if( $protected ) {
 694                         $this->setPageTitle( wfMsg( 'viewsource' ) );
 695                         $this->addWikiText( wfMsg( 'protectedtext' ) );
 696                 } else {
 697                         $this->setPageTitle( wfMsg( 'readonly' ) );
 698                         if ( $wgReadOnly ) {
 699                                 $reason = $wgReadOnly;
 700                         } else {
 701                                 $reason = file_get_contents( $wgReadOnlyFile );
 702                         }
 703                         $this->addWikiText( wfMsg( 'readonlytext', $reason ) );
 704                 }
 705
 706                 if( is_string( $source ) ) {
 707                         if( strcmp( $source, '' ) == 0 ) {
 708                                 $source = wfMsg( 'noarticletext' );
 709                         }
 710                         $rows = $wgUser->getOption( 'rows' );
 711                         $cols = $wgUser->getOption( 'cols' );
 712                         $text = "\n<textarea cols='$cols' rows='$rows' readonly='readonly'>" .
 713                                 htmlspecialchars( $source ) . "\n</textarea>";
 714                         $this->addHTML( $text );
 715                 }
 716
 717                 $this->returnToMain( false );
 718         }
 719
 720         function fatalError( $message ) {
 721                 $this->setPageTitle( wfMsg( "internalerror" ) );
 722                 $this->setRobotpolicy( "noindex,nofollow" );
 723                 $this->setArticleRelated( false );
 724                 $this->enableClientCache( false );
 725                 $this->mRedirect = '';
 726
 727                 $this->mBodytext = $message;
 728                 $this->output();
 729                 wfErrorExit();
 730         }
 731
 732         function unexpectedValueError( $name, $val ) {
 733                 $this->fatalError( wfMsg( 'unexpected', $name, $val ) );
 734         }
 735
 736         function fileCopyError( $old, $new ) {
 737                 $this->fatalError( wfMsg( 'filecopyerror', $old, $new ) );
 738         }
 739
 740         function fileRenameError( $old, $new ) {
 741                 $this->fatalError( wfMsg( 'filerenameerror', $old, $new ) );
 742         }
 743
 744         function fileDeleteError( $name ) {
 745                 $this->fatalError( wfMsg( 'filedeleteerror', $name ) );
 746         }
 747
 748         function fileNotFoundError( $name ) {
 749                 $this->fatalError( wfMsg( 'filenotfound', $name ) );
 750         }
 751
 752         /**
 753          * return from error messages or notes
 754          * @param $auto automatically redirect the user after 10 seconds
 755          * @param $returnto page title to return to. Default is Main Page.
 756          */
 757         function returnToMain( $auto = true, $returnto = NULL ) {
 758                 global $wgUser, $wgOut, $wgRequest;
 759
 760                 if ( $returnto == NULL ) {
 761                         $returnto = $wgRequest->getText( 'returnto' );
 762                 }
 763                 $returnto = htmlspecialchars( $returnto );
 764
 765                 $sk = $wgUser->getSkin();
 766                 if ( '' == $returnto ) {
 767                         $returnto = wfMsgForContent( 'mainpage' );
 768                 }
 769                 $link = $sk->makeKnownLink( $returnto, '' );
 770
 771                 $r = wfMsg( 'returnto', $link );
 772                 if ( $auto ) {
 773                         $titleObj = Title::newFromText( $returnto );
 774                         $wgOut->addMeta( 'http:Refresh', '10;url=' . $titleObj->escapeFullURL() );
 775                 }
 776                 $wgOut->addHTML( "\n<p>$r</p>\n" );
 777         }
 778
 779         /**
 780          * This function takes the title (first item of mGoodLinks), categories, existing and broken links for the page
 781          * and uses the first 10 of them for META keywords
 782          */
 783         function addMetaTags () {
 784                 global $wgLinkCache , $wgOut ;
 785                 $categories = array_keys ( $wgLinkCache->mCategoryLinks ) ;
 786                 $good = array_keys ( $wgLinkCache->mGoodLinks ) ;
 787                 $bad = array_keys ( $wgLinkCache->mBadLinks ) ;
 788                 $a = array_merge ( array_slice ( $good , 0 , 1 ), $categories, array_slice ( $good , 1 , 9 ) , $bad ) ;
 789                 $a = array_slice ( $a , 0 , 10 ) ; # 10 keywords max
 790                 $a = implode ( ',' , $a ) ;
 791                 $strip = array(
 792                         "/<.*?>/" => '',
 793                         "/_/" => ' '
 794                 );
 795                 $a = htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),$a ));
 796
 797                 $wgOut->addMeta ( 'KEYWORDS' , $a ) ;
 798         }
 799
 800         /**
 801          * @private
 802          * @return string
 803          */
 804         function headElement() {
 805                 global $wgDocType, $wgDTD, $wgContLanguageCode, $wgOutputEncoding, $wgMimeType;
 806                 global $wgUser, $wgContLang, $wgRequest, $wgUseTrackbacks, $wgTitle;
 807
 808                 if( $wgMimeType == 'text/xml' || $wgMimeType == 'application/xhtml+xml' || $wgMimeType == 'application/xml' ) {
 809                         $ret = "<?xml version=\"1.0\" encoding=\"$wgOutputEncoding\" ?>\n";
 810                 } else {
 811                         $ret = '';
 812                 }
 813
 814                 $ret .= "<!DOCTYPE html PUBLIC \"$wgDocType\"\n        \"$wgDTD\">\n";
 815
 816                 if ( "" == $this->mHTMLtitle ) {
 817                         $this->mHTMLtitle = wfMsg( "pagetitle", $this->mPagetitle );
 818                 }
 819
 820                 $rtl = $wgContLang->isRTL() ? " dir='RTL'" : '';
 821                 $ret .= "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"$wgContLanguageCode\" lang=\"$wgContLanguageCode\" $rtl>\n";
 822                 $ret .= "<head>\n<title>" . htmlspecialchars( $this->mHTMLtitle ) . "</title>\n";
 823                 array_push( $this->mMetatags, array( "http:Content-type", "$wgMimeType; charset={$wgOutputEncoding}" ) );
 824
 825                 $ret .= $this->getHeadLinks();
 826                 global $wgStylePath;
 827                 if( $this->isPrintable() ) {
 828                         $media = '';
 829                 } else {
 830                         $media = "media='print'";
 831                 }
 832                 $printsheet = htmlspecialchars( "$wgStylePath/common/wikiprintable.css" );
 833                 $ret .= "<link rel='stylesheet' type='text/css' $media href='$printsheet' />\n";
 834
 835                 $sk = $wgUser->getSkin();
 836                 $ret .= $sk->getHeadScripts();
 837                 $ret .= $this->mScripts;
 838                 $ret .= $sk->getUserStyles();
 839
 840                 if ($wgUseTrackbacks && $this->isArticleRelated())
 841                         $ret .= $wgTitle->trackbackRDF();
 842
 843                 $ret .= "</head>\n";
 844                 return $ret;
 845         }
 846
 847         function getHeadLinks() {
 848                 global $wgRequest, $wgStylePath;
 849                 $ret = '';
 850                 foreach ( $this->mMetatags as $tag ) {
 851                         if ( 0 == strcasecmp( 'http:', substr( $tag[0], 0, 5 ) ) ) {
 852                                 $a = 'http-equiv';
 853                                 $tag[0] = substr( $tag[0], 5 );
 854                         } else {
 855                                 $a = 'name';
 856                         }
 857                         $ret .= "<meta $a=\"{$tag[0]}\" content=\"{$tag[1]}\" />\n";
 858                 }
 859                 $p = $this->mRobotpolicy;
 860                 if ( '' == $p ) { $p = 'index,follow'; }
 861                 $ret .= "<meta name=\"robots\" content=\"$p\" />\n";
 862
 863                 if ( count( $this->mKeywords ) > 0 ) {
 864                         $strip = array(
 865                                 "/<.*?>/" => '',
 866                                 "/_/" => ' '
 867                         );
 868                         $ret .= "<meta name=\"keywords\" content=\"" .
 869                           htmlspecialchars(preg_replace(array_keys($strip), array_values($strip),implode( ",", $this->mKeywords ))) . "\" />\n";
 870                 }
 871                 foreach ( $this->mLinktags as $tag ) {
 872                         $ret .= '<link';
 873                         foreach( $tag as $attr => $val ) {
 874                                 $ret .= " $attr=\"" . htmlspecialchars( $val ) . "\"";
 875                         }
 876                         $ret .= " />\n";
 877                 }
 878                 if( $this->isSyndicated() ) {
 879                         # FIXME: centralize the mime-type and name information in Feed.php
 880                         $link = $wgRequest->escapeAppendQuery( 'feed=rss' );
 881                         $ret .= "<link rel='alternate' type='application/rss+xml' title='RSS 2.0' href='$link' />\n";
 882                         $link = $wgRequest->escapeAppendQuery( 'feed=atom' );
 883                         $ret .= "<link rel='alternate' type='application/atom+xml' title='Atom 0.3' href='$link' />\n";
 884                 }
 885
 886                 return $ret;
 887         }
 888
 889         /**
 890          * Run any necessary pre-output transformations on the buffer text
 891          */
 892         function transformBuffer( $options = 0 ) {
 893         }
 894
 895
 896         /**
 897          * Turn off regular page output and return an error reponse
 898          * for when rate limiting has triggered.
 899          * @todo i18n
 900          * @access public
 901          */
 902         function rateLimited() {
 903                 global $wgOut;
 904                 $wgOut->disable();
 905                 wfHttpError( 500, 'Internal Server Error',
 906                         'Sorry, the server has encountered an internal error. ' .
 907                         'Please wait a moment and hit "refresh" to submit the request again.' );
 908         }
 909
 910 }
 911
 912 } // MediaWiki
 913
 914 ?>