480 lines
16 KiB
PHP
480 lines
16 KiB
PHP
<?php
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/**
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* MediaWiki is the to-be base class for this whole project
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*
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* @internal documentation reviewed 15 Mar 2010
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*/
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class MediaWiki {
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/**
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* TODO: fold $output, etc, into this
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* @var RequestContext
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*/
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private $context;
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public function request( WebRequest $x = null ){
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return wfSetVar( $this->context->request, $x );
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}
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public function output( OutputPage $x = null ){
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return wfSetVar( $this->context->output, $x );
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}
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public function __construct( RequestContext $context ){
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$this->context = $context;
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$this->context->setTitle( $this->parseTitle() );
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}
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/**
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* Parse $request to get the Title object
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*
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* @return Title object to be $wgTitle
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*/
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private function parseTitle() {
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global $wgContLang;
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$curid = $this->context->request->getInt( 'curid' );
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$title = $this->context->request->getVal( 'title' );
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if ( $this->context->request->getCheck( 'search' ) ) {
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// Compatibility with old search URLs which didn't use Special:Search
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// Just check for presence here, so blank requests still
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// show the search page when using ugly URLs (bug 8054).
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$ret = SpecialPage::getTitleFor( 'Search' );
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} elseif ( $curid ) {
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// URLs like this are generated by RC, because rc_title isn't always accurate
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$ret = Title::newFromID( $curid );
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} elseif ( $title == '' && $this->getAction() != 'delete' ) {
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$ret = Title::newMainPage();
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} else {
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$ret = Title::newFromURL( $title );
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// check variant links so that interwiki links don't have to worry
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// about the possible different language variants
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if ( count( $wgContLang->getVariants() ) > 1 && !is_null( $ret ) && $ret->getArticleID() == 0 ){
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$wgContLang->findVariantLink( $title, $ret );
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}
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}
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// For non-special titles, check for implicit titles
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if ( is_null( $ret ) || $ret->getNamespace() != NS_SPECIAL ) {
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// We can have urls with just ?diff=,?oldid= or even just ?diff=
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$oldid = $this->context->request->getInt( 'oldid' );
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$oldid = $oldid ? $oldid : $this->context->request->getInt( 'diff' );
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// Allow oldid to override a changed or missing title
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if ( $oldid ) {
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$rev = Revision::newFromId( $oldid );
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$ret = $rev ? $rev->getTitle() : $ret;
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}
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}
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if( $ret === null || ( $ret->getDBkey() == '' && $ret->getInterwiki() == '' ) ){
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$ret = new BadTitle;
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}
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return $ret;
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}
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/**
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* Get the Title object that we'll be acting on, as specified in the WebRequest
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* @return Title
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*/
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public function getTitle(){
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if( $this->context->title === null ){
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$this->context->title = $this->parseTitle();
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}
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return $this->context->title;
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}
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/**
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* Performs the request.
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* - bad titles
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* - read restriction
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* - local interwiki redirects
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* - redirect loop
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* - special pages
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* - normal pages
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*
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* @return Article object
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*/
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public function performRequest() {
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global $wgServer, $wgUsePathInfo;
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wfProfileIn( __METHOD__ );
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if ( $this->context->request->getVal( 'printable' ) === 'yes' ) {
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$this->context->output->setPrintable();
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}
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wfRunHooks( 'BeforeInitialize', array(
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&$this->context->title,
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null,
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&$this->context->output,
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&$this->context->user,
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$this->context->request,
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$this
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) );
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// Invalid titles. Bug 21776: The interwikis must redirect even if the page name is empty.
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if ( $this->context->title instanceof BadTitle ) {
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throw new ErrorPageError( 'badtitle', 'badtitletext' );
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// If the user is not logged in, the Namespace:title of the article must be in
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// the Read array in order for the user to see it. (We have to check here to
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// catch special pages etc. We check again in Article::view())
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} else if ( !$this->context->title->userCanRead() ) {
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$this->context->output->loginToUse();
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// Interwiki redirects
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} else if ( $this->context->title->getInterwiki() != '' ) {
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$rdfrom = $this->context->request->getVal( 'rdfrom' );
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if ( $rdfrom ) {
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$url = $this->context->title->getFullURL( 'rdfrom=' . urlencode( $rdfrom ) );
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} else {
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$query = $this->context->request->getValues();
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unset( $query['title'] );
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$url = $this->context->title->getFullURL( $query );
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}
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// Check for a redirect loop
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if ( !preg_match( '/^' . preg_quote( $wgServer, '/' ) . '/', $url ) && $this->context->title->isLocal() ) {
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// 301 so google et al report the target as the actual url.
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$this->context->output->redirect( $url, 301 );
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} else {
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$this->context->title = new BadTitle;
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wfProfileOut( __METHOD__ );
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throw new ErrorPageError( 'badtitle', 'badtitletext' );
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}
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// Redirect loops, no title in URL, $wgUsePathInfo URLs, and URLs with a variant
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} else if ( $this->context->request->getVal( 'action', 'view' ) == 'view' && !$this->context->request->wasPosted()
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&& ( $this->context->request->getVal( 'title' ) === null || $this->context->title->getPrefixedDBKey() != $this->context->request->getVal( 'title' ) )
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&& !count( array_diff( array_keys( $this->context->request->getValues() ), array( 'action', 'title' ) ) ) )
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{
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if ( $this->context->title->getNamespace() == NS_SPECIAL ) {
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list( $name, $subpage ) = SpecialPageFactory::resolveAlias( $this->context->title->getDBkey() );
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if ( $name ) {
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$this->context->title = SpecialPage::getTitleFor( $name, $subpage );
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}
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}
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$targetUrl = $this->context->title->getFullURL();
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// Redirect to canonical url, make it a 301 to allow caching
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if ( $targetUrl == $this->context->request->getFullRequestURL() ) {
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$message = "Redirect loop detected!\n\n" .
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"This means the wiki got confused about what page was " .
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"requested; this sometimes happens when moving a wiki " .
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"to a new server or changing the server configuration.\n\n";
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if ( $wgUsePathInfo ) {
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$message .= "The wiki is trying to interpret the page " .
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"title from the URL path portion (PATH_INFO), which " .
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"sometimes fails depending on the web server. Try " .
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"setting \"\$wgUsePathInfo = false;\" in your " .
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"LocalSettings.php, or check that \$wgArticlePath " .
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"is correct.";
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} else {
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$message .= "Your web server was detected as possibly not " .
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"supporting URL path components (PATH_INFO) correctly; " .
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"check your LocalSettings.php for a customized " .
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"\$wgArticlePath setting and/or toggle \$wgUsePathInfo " .
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"to true.";
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}
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wfHttpError( 500, "Internal error", $message );
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} else {
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$this->context->output->setSquidMaxage( 1200 );
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$this->context->output->redirect( $targetUrl, '301' );
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}
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// Special pages
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} else if ( NS_SPECIAL == $this->context->title->getNamespace() ) {
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// actions that need to be made when we have a special pages
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SpecialPageFactory::executePath( $this->context->title, $this->context );
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} else {
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// ...otherwise treat it as an article view. The article
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// may be a redirect to another article or URL.
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$article = $this->initializeArticle();
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if ( is_object( $article ) ) {
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$this->performAction( $article );
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wfProfileOut( __METHOD__ );
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return $article;
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} elseif ( is_string( $article ) ) {
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$this->context->output->redirect( $article );
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} else {
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wfProfileOut( __METHOD__ );
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throw new MWException( "Shouldn't happen: MediaWiki::initializeArticle() returned neither an object nor a URL" );
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}
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}
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wfProfileOut( __METHOD__ );
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}
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/**
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* Create an Article object of the appropriate class for the given page.
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*
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* @deprecated in 1.19; use Article::newFromTitle() instead
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* @param $title Title
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* @param $context RequestContext
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* @return Article object
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*/
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public static function articleFromTitle( $title, RequestContext $context ) {
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return Article::newFromTitle( $title, $context );
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}
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/**
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* Returns the action that will be executed, not necesserly the one passed
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* passed through the "action" parameter. Actions disabled in
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* $wgDisabledActions will be replaced by "nosuchaction"
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*
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* @return String: action
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*/
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public function getAction() {
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global $wgDisabledActions;
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$action = $this->context->request->getVal( 'action', 'view' );
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// Check for disabled actions
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if ( in_array( $action, $wgDisabledActions ) ) {
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return 'nosuchaction';
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}
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// Workaround for bug #20966: inability of IE to provide an action dependent
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// on which submit button is clicked.
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if ( $action === 'historysubmit' ) {
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if ( $this->context->request->getBool( 'revisiondelete' ) ) {
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return 'revisiondelete';
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} else {
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return 'view';
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}
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} elseif ( $action == 'editredlink' ) {
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return 'edit';
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}
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return $action;
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}
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/**
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* Initialize the main Article object for "standard" actions (view, etc)
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* Create an Article object for the page, following redirects if needed.
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*
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* @return mixed an Article, or a string to redirect to another URL
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*/
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private function initializeArticle() {
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global $wgDisableHardRedirects;
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wfProfileIn( __METHOD__ );
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$action = $this->context->request->getVal( 'action', 'view' );
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$article = Article::newFromTitle( $this->context->title, $this->context );
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// NS_MEDIAWIKI has no redirects.
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// It is also used for CSS/JS, so performance matters here...
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if ( $this->context->title->getNamespace() == NS_MEDIAWIKI ) {
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wfProfileOut( __METHOD__ );
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return $article;
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}
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// Namespace might change when using redirects
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// Check for redirects ...
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$file = ( $this->context->title->getNamespace() == NS_FILE ) ? $article->getFile() : null;
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if ( ( $action == 'view' || $action == 'render' ) // ... for actions that show content
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&& !$this->context->request->getVal( 'oldid' ) && // ... and are not old revisions
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!$this->context->request->getVal( 'diff' ) && // ... and not when showing diff
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$this->context->request->getVal( 'redirect' ) != 'no' && // ... unless explicitly told not to
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// ... and the article is not a non-redirect image page with associated file
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!( is_object( $file ) && $file->exists() && !$file->getRedirected() ) )
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{
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// Give extensions a change to ignore/handle redirects as needed
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$ignoreRedirect = $target = false;
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wfRunHooks( 'InitializeArticleMaybeRedirect',
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array( &$this->context->title, &$this->context->request, &$ignoreRedirect, &$target, &$article ) );
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// Follow redirects only for... redirects.
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// If $target is set, then a hook wanted to redirect.
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if ( !$ignoreRedirect && ( $target || $article->isRedirect() ) ) {
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// Is the target already set by an extension?
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$target = $target ? $target : $article->followRedirect();
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if ( is_string( $target ) ) {
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if ( !$wgDisableHardRedirects ) {
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// we'll need to redirect
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wfProfileOut( __METHOD__ );
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return $target;
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}
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}
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if ( is_object( $target ) ) {
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// Rewrite environment to redirected article
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$rarticle = Article::newFromTitle( $target, $this->context );
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$rarticle->loadPageData();
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if ( $rarticle->exists() || ( is_object( $file ) && !$file->isLocal() ) ) {
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$rarticle->setRedirectedFrom( $this->context->title );
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$article = $rarticle;
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$this->context->title = $target;
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}
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}
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} else {
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$this->context->title = $article->getTitle();
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}
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}
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wfProfileOut( __METHOD__ );
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return $article;
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}
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/**
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* Cleaning up request by doing deferred updates, DB transaction, and the output
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*/
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public function finalCleanup() {
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wfProfileIn( __METHOD__ );
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// Now commit any transactions, so that unreported errors after
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// output() don't roll back the whole DB transaction
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$factory = wfGetLBFactory();
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$factory->commitMasterChanges();
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// Output everything!
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$this->context->output->output();
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// Do any deferred jobs
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wfDoUpdates( 'commit' );
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$this->doJobs();
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wfProfileOut( __METHOD__ );
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}
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/**
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* Do a job from the job queue
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*/
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private function doJobs() {
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global $wgJobRunRate;
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if ( $wgJobRunRate <= 0 || wfReadOnly() ) {
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return;
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}
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if ( $wgJobRunRate < 1 ) {
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$max = mt_getrandmax();
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if ( mt_rand( 0, $max ) > $max * $wgJobRunRate ) {
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return;
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}
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$n = 1;
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} else {
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$n = intval( $wgJobRunRate );
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}
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// Close the session so that jobs don't access the current session
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$this->shutdownLBFactory();
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session_write_close();
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while ( $n-- && false != ( $job = Job::pop() ) ) {
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$output = $job->toString() . "\n";
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$t = -wfTime();
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$success = $job->run();
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$t += wfTime();
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$t = round( $t * 1000 );
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if ( !$success ) {
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$output .= "Error: " . $job->getLastError() . ", Time: $t ms\n";
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} else {
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$output .= "Success, Time: $t ms\n";
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}
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wfDebugLog( 'jobqueue', $output );
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}
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}
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/**
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* Ends this task peacefully
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*/
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public function restInPeace() {
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MessageCache::logMessages();
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wfLogProfilingData();
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$this->shutdownLBFactory();
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wfDebug( "Request ended normally\n" );
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}
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/**
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* Commit pending master changes, shutdown the current loadbalancer
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* factory and destroys the factory instance.
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*/
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private function shutdownLBFactory() {
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// Commit and close up!
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$factory = LBFactory::singleton();
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$factory->commitMasterChanges();
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$factory->shutdown();
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LBFactory::destroyInstance();
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}
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/**
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* Perform one of the "standard" actions
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*
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* @param $article Article
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*/
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private function performAction( $article ) {
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global $wgSquidMaxage, $wgUseExternalEditor;
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wfProfileIn( __METHOD__ );
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if ( !wfRunHooks( 'MediaWikiPerformAction', array(
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$this->context->output, $article, $this->context->title,
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$this->context->user, $this->context->request, $this ) ) )
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{
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wfProfileOut( __METHOD__ );
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return;
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}
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$act = $this->getAction();
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$action = Action::factory( $act, $article );
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if( $action instanceof Action ){
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$action->show();
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wfProfileOut( __METHOD__ );
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return;
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}
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switch( $act ) {
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case 'view':
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$this->context->output->setSquidMaxage( $wgSquidMaxage );
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$article->view();
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break;
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case 'raw': // includes JS/CSS
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wfProfileIn( __METHOD__ . '-raw' );
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$raw = new RawPage( $article );
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$raw->view();
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wfProfileOut( __METHOD__ . '-raw' );
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break;
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case 'delete':
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case 'revert':
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case 'rollback':
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case 'protect':
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case 'unprotect':
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case 'info':
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case 'markpatrolled':
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case 'render':
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case 'deletetrackback':
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$article->$act();
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break;
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case 'submit':
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if ( session_id() == '' ) {
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// Send a cookie so anons get talk message notifications
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wfSetupSession();
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}
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// Continue...
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case 'edit':
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if ( wfRunHooks( 'CustomEditor', array( $article, $this->context->user ) ) ) {
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$internal = $this->context->request->getVal( 'internaledit' );
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$external = $this->context->request->getVal( 'externaledit' );
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$section = $this->context->request->getVal( 'section' );
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$oldid = $this->context->request->getVal( 'oldid' );
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if ( !$wgUseExternalEditor || $act == 'submit' || $internal ||
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$section || $oldid || ( !$this->context->user->getOption( 'externaleditor' ) && !$external ) ) {
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$editor = new EditPage( $article );
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$editor->submit();
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} elseif ( $wgUseExternalEditor && ( $external || $this->context->user->getOption( 'externaleditor' ) ) ) {
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$mode = $this->context->request->getVal( 'mode' );
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$extedit = new ExternalEdit( $article, $mode );
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$extedit->edit();
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}
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}
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break;
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case 'history':
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if ( $this->context->request->getFullRequestURL() == $this->context->title->getInternalURL( 'action=history' ) ) {
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$this->context->output->setSquidMaxage( $wgSquidMaxage );
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}
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$history = new HistoryPage( $article );
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$history->history();
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break;
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case 'revisiondelete':
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// For show/hide submission from history page
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$special = SpecialPageFactory::getPage( 'Revisiondelete' );
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$special->execute( '' );
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break;
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default:
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if ( wfRunHooks( 'UnknownAction', array( $act, $article ) ) ) {
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$this->context->output->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
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}
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}
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wfProfileOut( __METHOD__ );
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}
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}
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