544 lines
17 KiB
PHP
544 lines
17 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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class MediaWiki {
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var $GET; /* Stores the $_GET variables at time of creation, can be changed */
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var $params = array();
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/** Constructor. It just save the $_GET variable */
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function __construct() {
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$this->GET = $_GET;
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}
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/**
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* Stores key/value pairs to circumvent global variables
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* Note that keys are case-insensitive!
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*
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* @param $key String: key to store
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* @param $value Mixed: value to put for the key
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*/
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function setVal( $key, &$value ) {
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$key = strtolower( $key );
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$this->params[$key] =& $value;
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}
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/**
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* Retrieves key/value pairs to circumvent global variables
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* Note that keys are case-insensitive!
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*
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* @param $key String: key to get
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* @param $default Mixed: default value if if the key doesn't exist
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*/
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function getVal( $key, $default = '' ) {
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$key = strtolower( $key );
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if( isset( $this->params[$key] ) ) {
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return $this->params[$key];
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}
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return $default;
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}
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/**
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* Initialization of ... everything
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* Performs the request too
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* FIXME: why is this crap called "initialize" when it performs everything?
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*
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* @param $title Title ($wgTitle)
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* @param $article Article
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* @param $output OutputPage
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* @param $user User
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* @param $request WebRequest
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*/
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function initialize( &$title, &$article, &$output, &$user, $request ) {
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wfProfileIn( __METHOD__ );
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$output->setTitle( $title );
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if( !$this->preliminaryChecks( $title, $output, $request ) ) {
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wfProfileOut( __METHOD__ );
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return;
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}
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if( !$this->initializeSpecialCases( $title, $output, $request ) ) {
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$new_article = $this->initializeArticle( $title, $output, $request );
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if( is_object( $new_article ) ) {
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$article = $new_article;
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$this->performAction( $output, $article, $title, $user, $request );
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} elseif( is_string( $new_article ) ) {
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$output->redirect( $new_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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* Check if the maximum lag of database slaves is higher that $maxLag, and
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* if it's the case, output an error message
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*
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* @param $maxLag int: maximum lag allowed for the request, as supplied by
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* the client
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* @return bool true if the request can continue
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*/
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function checkMaxLag( $maxLag ) {
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list( $host, $lag ) = wfGetLB()->getMaxLag();
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if( $lag > $maxLag ) {
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wfMaxlagError( $host, $lag, $maxLag );
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return false;
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} else {
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return true;
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}
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}
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/**
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* Checks some initial queries
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* Note that $title here is *not* a Title object, but a string!
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*
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* @param $title String
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* @param $action String
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* @return Title object to be $wgTitle
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*/
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function checkInitialQueries( $title, $action ) {
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global $wgOut, $wgRequest, $wgContLang;
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if( $wgRequest->getVal( 'printable' ) === 'yes' ) {
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$wgOut->setPrintable();
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}
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$ret = NULL;
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if( $curid = $wgRequest->getInt( 'curid' ) ) {
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# URLs like this are generated by RC, because rc_title isn't always accurate
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$ret = Title::newFromID( $curid );
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} elseif( '' == $title && 'delete' != $action ) {
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$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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# 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 = $wgRequest->getInt( 'oldid' );
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$oldid = $oldid ? $oldid : $wgRequest->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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return $ret;
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}
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/**
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* Checks for search query and anon-cannot-read case
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*
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* @param $title Title
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* @param $output OutputPage
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* @param $request WebRequest
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*/
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function preliminaryChecks( &$title, &$output, $request ) {
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if( $request->getCheck( 'search' ) ) {
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// Compatibility with old search URLs which didn't use Special:Search
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// Just check for presence here, so blank requests still
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// show the search page when using ugly URLs (bug 8054).
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// Do this above the read whitelist check for security...
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$title = SpecialPage::getTitleFor( 'Search' );
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}
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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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if( !is_null( $title ) && !$title->userCanRead() ) {
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global $wgDeferredUpdateList;
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$output->loginToUse();
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$this->finalCleanup( $wgDeferredUpdateList, $output );
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$output->disable();
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return false;
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}
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return true;
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}
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/**
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* Initialize some special cases:
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* - bad titles
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* - local interwiki redirects
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* - redirect loop
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* - special pages
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*
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* FIXME: why is this crap called "initialize" when it performs everything?
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*
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* @param $title Title
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* @param $output OutputPage
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* @param $request WebRequest
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* @return bool true if the request is already executed
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*/
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function initializeSpecialCases( &$title, &$output, $request ) {
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wfProfileIn( __METHOD__ );
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$action = $this->getVal( 'Action' );
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if( is_null($title) || $title->getDBkey() == '' ) {
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$title = SpecialPage::getTitleFor( 'Badtitle' );
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# Die now before we mess up $wgArticle and the skin stops working
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throw new ErrorPageError( 'badtitle', 'badtitletext' );
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} else if( $title->getInterwiki() != '' ) {
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if( $rdfrom = $request->getVal( 'rdfrom' ) ) {
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$url = $title->getFullURL( 'rdfrom=' . urlencode( $rdfrom ) );
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} else {
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$url = $title->getFullURL();
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}
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/* Check for a redirect loop */
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if( !preg_match( '/^' . preg_quote( $this->getVal('Server'), '/' ) . '/', $url ) && $title->isLocal() ) {
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$output->redirect( $url );
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} else {
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$title = SpecialPage::getTitleFor( 'Badtitle' );
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throw new ErrorPageError( 'badtitle', 'badtitletext' );
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}
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} else if( $action == 'view' && !$request->wasPosted() &&
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( !isset($this->GET['title']) || $title->getPrefixedDBKey() != $this->GET['title'] ) &&
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!count( array_diff( array_keys( $this->GET ), array( 'action', 'title' ) ) ) )
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{
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$targetUrl = $title->getFullURL();
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// Redirect to canonical url, make it a 301 to allow caching
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if( $targetUrl == $request->getFullRequestURL() ) {
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$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( $this->getVal( 'UsePathInfo' ) ) {
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$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", $message );
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return false;
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} else {
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$output->setSquidMaxage( 1200 );
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$output->redirect( $targetUrl, '301' );
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}
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} else if( NS_SPECIAL == $title->getNamespace() ) {
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/* actions that need to be made when we have a special pages */
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SpecialPage::executePath( $title );
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} else {
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/* No match to special cases */
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wfProfileOut( __METHOD__ );
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return false;
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}
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/* Did match a special case */
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wfProfileOut( __METHOD__ );
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return true;
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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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* @param $title Title
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* @return Article object
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*/
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static function articleFromTitle( &$title ) {
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if( NS_MEDIA == $title->getNamespace() ) {
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// FIXME: where should this go?
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$title = Title::makeTitle( NS_FILE, $title->getDBkey() );
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}
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$article = null;
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wfRunHooks( 'ArticleFromTitle', array( &$title, &$article ) );
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if( $article ) {
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return $article;
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}
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switch( $title->getNamespace() ) {
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case NS_FILE:
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return new ImagePage( $title );
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case NS_CATEGORY:
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return new CategoryPage( $title );
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default:
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return new Article( $title );
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}
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}
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/**
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* Initialize the object to be known as $wgArticle for "standard" actions
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* Create an Article object for the page, following redirects if needed.
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*
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* @param $title Title ($wgTitle)
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* @param $output OutputPage ($wgOut)
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* @param $request WebRequest ($wgRequest)
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* @return mixed an Article, or a string to redirect to another URL
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*/
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function initializeArticle( &$title, &$output, $request ) {
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wfProfileIn( __METHOD__ );
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$action = $this->getVal( 'action', 'view' );
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$article = self::articleFromTitle( $title );
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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( $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 = ($title->getNamespace() == NS_FILE) ? $article->getFile() : null;
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if( ( $action == 'view' || $action == 'render' ) // ... for actions that show content
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&& !$request->getVal( 'oldid' ) && // ... and are not old revisions
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$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 = $target = false;
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$dbr = wfGetDB( DB_SLAVE );
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$article->loadPageData( $article->pageDataFromTitle( $dbr, $title ) );
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wfRunHooks( 'InitializeArticleMaybeRedirect',
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array(&$title,&$request,&$ignoreRedirect,&$target,&$article) );
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// Follow redirects only for... redirects
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if( !$ignoreRedirect && $article->isRedirect() ) {
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# Is the target already set by an extension?
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$target = $target ? $target : $article->followRedirect();
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if( is_string( $target ) ) {
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if( !$this->getVal( 'DisableHardRedirects' ) ) {
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// we'll need to redirect
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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 = self::articleFromTitle( $target );
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$rarticle->loadPageData( $rarticle->pageDataFromTitle( $dbr, $target ) );
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if( $rarticle->exists() || ( is_object( $file ) && !$file->isLocal() ) ) {
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$rarticle->setRedirectedFrom( $title );
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$article = $rarticle;
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$title = $target;
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$output->setTitle( $title );
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}
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}
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} else {
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$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:
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** deferred updates, DB transaction, and the output
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*
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* @param $deferredUpdates array of updates to do
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* @param $output OutputPage
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*/
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function finalCleanup( &$deferredUpdates, &$output ) {
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wfProfileIn( __METHOD__ );
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# Now commit any transactions, so that unreported errors after
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# output() don't roll back the whole DB transaction
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$factory = wfGetLBFactory();
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$factory->commitMasterChanges();
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# Output everything!
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$output->output();
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# Do any deferred jobs
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$this->doUpdates( $deferredUpdates );
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$this->doJobs();
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wfProfileOut( __METHOD__ );
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}
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/**
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* Deferred updates aren't really deferred anymore. It's important to report
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* errors to the user, and that means doing this before OutputPage::output().
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* Note that for page saves, the client will wait until the script exits
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* anyway before following the redirect.
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*
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* @param $updates array of objects that hold an update to do
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*/
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function doUpdates( &$updates ) {
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wfProfileIn( __METHOD__ );
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/* No need to get master connections in case of empty updates array */
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if (!$updates) {
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wfProfileOut( __METHOD__ );
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return;
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}
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$dbw = wfGetDB( DB_MASTER );
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foreach( $updates as $up ) {
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$up->doUpdate();
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# Commit after every update to prevent lock contention
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if( $dbw->trxLevel() ) {
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$dbw->commit();
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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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* Do a job from the job queue
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*/
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function doJobs() {
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$jobRunRate = $this->getVal( 'JobRunRate' );
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if( $jobRunRate <= 0 || wfReadOnly() ) {
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return;
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}
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if( $jobRunRate < 1 ) {
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$max = mt_getrandmax();
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if( mt_rand( 0, $max ) > $max * $jobRunRate ) {
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return;
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}
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$n = 1;
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} else {
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$n = intval( $jobRunRate );
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}
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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', $output );
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}
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}
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/**
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* Ends this task peacefully
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*/
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function restInPeace() {
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wfLogProfilingData();
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# Commit and close up!
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$factory = wfGetLBFactory();
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$factory->commitMasterChanges();
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$factory->shutdown();
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wfDebug( "Request ended normally\n" );
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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 $output OutputPage
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* @param $article Article
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* @param $title Title
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* @param $user User
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* @param $request WebRequest
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*/
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function performAction( &$output, &$article, &$title, &$user, &$request ) {
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wfProfileIn( __METHOD__ );
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if( !wfRunHooks( 'MediaWikiPerformAction', array( $output, $article, $title, $user, $request, $this ) ) ) {
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wfProfileOut( __METHOD__ );
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return;
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}
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$action = $this->getVal( 'Action' );
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if( in_array( $action, $this->getVal( 'DisabledActions', array() ) ) ) {
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/* No such action; this will switch to the default case */
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$action = 'nosuchaction';
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}
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switch( $action ) {
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case 'view':
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$output->setSquidMaxage( $this->getVal( 'SquidMaxage' ) );
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$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 'watch':
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case 'unwatch':
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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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case 'purge':
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$article->$action();
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break;
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case 'print':
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$article->view();
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break;
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case 'dublincore':
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if( !$this->getVal( 'EnableDublinCoreRdf' ) ) {
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wfHttpError( 403, 'Forbidden', wfMsg( 'nodublincore' ) );
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} else {
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$rdf = new DublinCoreRdf( $article );
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$rdf->show();
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}
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break;
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case 'creativecommons':
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if( !$this->getVal( 'EnableCreativeCommonsRdf' ) ) {
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wfHttpError( 403, 'Forbidden', wfMsg( 'nocreativecommons' ) );
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} else {
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$rdf = new CreativeCommonsRdf( $article );
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$rdf->show();
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}
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break;
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case 'credits':
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Credits::showPage( $article );
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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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}
|
|
/* Continue... */
|
|
case 'edit':
|
|
case 'editredlink':
|
|
if( wfRunHooks( 'CustomEditor', array( $article, $user ) ) ) {
|
|
$internal = $request->getVal( 'internaledit' );
|
|
$external = $request->getVal( 'externaledit' );
|
|
$section = $request->getVal( 'section' );
|
|
$oldid = $request->getVal( 'oldid' );
|
|
if( !$this->getVal( 'UseExternalEditor' ) || $action=='submit' || $internal ||
|
|
$section || $oldid || ( !$user->getOption( 'externaleditor' ) && !$external ) ) {
|
|
$editor = new EditPage( $article );
|
|
$editor->submit();
|
|
} elseif( $this->getVal( 'UseExternalEditor' ) && ( $external || $user->getOption( 'externaleditor' ) ) ) {
|
|
$mode = $request->getVal( 'mode' );
|
|
$extedit = new ExternalEdit( $article, $mode );
|
|
$extedit->edit();
|
|
}
|
|
}
|
|
break;
|
|
case 'history':
|
|
if( $request->getFullRequestURL() == $title->getInternalURL( 'action=history' ) ) {
|
|
$output->setSquidMaxage( $this->getVal( 'SquidMaxage' ) );
|
|
}
|
|
$history = new PageHistory( $article );
|
|
$history->history();
|
|
break;
|
|
default:
|
|
if( wfRunHooks( 'UnknownAction', array( $action, $article ) ) ) {
|
|
$output->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
|
|
}
|
|
}
|
|
wfProfileOut( __METHOD__ );
|
|
|
|
}
|
|
|
|
}; /* End of class MediaWiki */
|