224 lines
7.5 KiB
PHP
224 lines
7.5 KiB
PHP
<?php
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/**
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* This is the main web entry point for MediaWiki.
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*
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* If you are reading this in your web browser, your server is probably
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* not configured correctly to run PHP applications!
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*
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* See the README, INSTALL, and UPGRADE files for basic setup instructions
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* and pointers to the online documentation.
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*
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* http://www.mediawiki.org/
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*
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* ----------
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*
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* Copyright (C) 2001-2011 Magnus Manske, Brion Vibber, Lee Daniel Crocker,
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* Tim Starling, Erik Möller, Gabriel Wicke, Ævar Arnfjörð Bjarmason,
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* Niklas Laxström, Domas Mituzas, Rob Church, Yuri Astrakhan, Aryeh Gregor,
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* Aaron Schulz, Andrew Garrett, Raimond Spekking, Alexandre Emsenhuber
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* Siebrand Mazeland, Chad Horohoe, Roan Kattouw and others.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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*/
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// Bail on old versions of PHP. Pretty much every other file in the codebase
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// has structures (try/catch, foo()->bar(), etc etc) which throw parse errors in PHP 4.
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// Setup.php and ObjectCache.php have structures invalid in PHP 5.0 and 5.1, respectively.
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if ( !function_exists( 'version_compare' ) || version_compare( phpversion(), '5.2.3' ) < 0 ) {
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$phpversion = htmlspecialchars( phpversion() );
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$errorMsg = <<<ENDL
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<p>
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MediaWiki requires PHP 5.2.3 or higher. You are running PHP $phpversion.
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</p>
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<p>
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Please consider <a href="http://www.php.net/downloads.php">upgrading your copy of PHP</a>.
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PHP versions less than 5.3.0 are no longer supported by the PHP Group and will not receive
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security or bugfix updates.
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</p>
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<p>
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If for some reason you are unable to upgrade your PHP version, you will need to
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<a href="http://www.mediawiki.org/wiki/Download">download</a> an older version
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of MediaWiki from our website. See our
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<a href="http://www.mediawiki.org/wiki/Compatibility#PHP">compatibility page</a>
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for details of which versions are compatible with prior versions of PHP.
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</p>
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ENDL;
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wfDie( $errorMsg );
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}
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# Initialise common code. This gives us access to GlobalFunctions, the AutoLoader, and
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# the globals $wgRequest, $wgOut, $wgUser, $wgLang and $wgContLang, amongst others; it
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# does *not* load $wgTitle
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if ( isset( $_SERVER['MW_COMPILED'] ) ) {
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require ( 'phase3/includes/WebStart.php' );
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} else {
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require ( dirname( __FILE__ ) . '/includes/WebStart.php' );
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}
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try {
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wfIndexMain();
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} catch ( Exception $e ) {
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MWExceptionHandler::handle( $e );
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}
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function wfIndexMain() {
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global $wgRequest, $wgShowHostnames, $mediaWiki, $wgTitle, $wgUseAjax, $wgUseFileCache;
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wfProfileIn( 'index.php' );
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wfProfileIn( 'index.php-setup' );
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$maxLag = $wgRequest->getVal( 'maxlag' );
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if ( !is_null( $maxLag ) ) {
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$lb = wfGetLB(); // foo()->bar() is not supported in PHP4
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list( $host, $lag ) = $lb->getMaxLag();
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if ( $lag > $maxLag ) {
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header( 'HTTP/1.1 503 Service Unavailable' );
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header( 'Retry-After: ' . max( intval( $maxLag ), 5 ) );
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header( 'X-Database-Lag: ' . intval( $lag ) );
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header( 'Content-Type: text/plain' );
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if( $wgShowHostnames ) {
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echo "Waiting for $host: $lag seconds lagged\n";
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} else {
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echo "Waiting for a database server: $lag seconds lagged\n";
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}
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wfProfileOut( 'index.php-setup' );
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wfProfileOut( 'index.php' );
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return;
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}
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}
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# Initialize MediaWiki base class
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$context = RequestContext::getMain();
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$mediaWiki = new MediaWiki( $context );
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# Set title from request parameters
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$wgTitle = $mediaWiki->getTitle();
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$action = $wgRequest->getVal( 'action', 'view' );
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wfProfileOut( 'index.php-setup' );
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# Send Ajax requests to the Ajax dispatcher.
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if ( $wgUseAjax && $action == 'ajax' ) {
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$dispatcher = new AjaxDispatcher();
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$dispatcher->performAction();
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wfProfileOut( 'index.php' );
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$mediaWiki->restInPeace();
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return;
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}
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if ( $wgUseFileCache && $wgTitle !== null ) {
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wfProfileIn( 'index.php-filecache' );
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// Raw pages should handle cache control on their own,
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// even when using file cache. This reduces hits from clients.
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if ( $action != 'raw' && HTMLFileCache::useFileCache() ) {
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/* Try low-level file cache hit */
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$cache = new HTMLFileCache( $wgTitle, $action );
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if ( $cache->isFileCacheGood( /* Assume up to date */ ) ) {
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/* Check incoming headers to see if client has this cached */
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if ( !$context->output->checkLastModified( $cache->fileCacheTime() ) ) {
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$cache->loadFromFileCache();
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}
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# Do any stats increment/watchlist stuff
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$article = Article::newFromTitle( $wgTitle, $context );
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$article->viewUpdates();
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# Tell OutputPage that output is taken care of
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$context->output->disable();
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wfProfileOut( 'index.php-filecache' );
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$mediaWiki->finalCleanup();
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wfProfileOut( 'index.php' );
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$mediaWiki->restInPeace();
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return;
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}
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}
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wfProfileOut( 'index.php-filecache' );
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}
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/**
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* $wgArticle is deprecated, do not use it. This will possibly be removed
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* entirely in 1.20 or 1.21
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* @deprecated since 1.19
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*/
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global $wgArticle;
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$wgArticle = $mediaWiki->performRequest();
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$mediaWiki->finalCleanup();
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wfProfileOut( 'index.php' );
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$mediaWiki->restInPeace();
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}
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/**
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* Display something vaguely comprehensible in the event of a totally unrecoverable error.
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* Does not assume access to *anything*; no globals, no autloader, no database, no localisation.
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* Safe for PHP4 (and putting this here means that WebStart.php and GlobalSettings.php
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* no longer need to be).
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*
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* Calling this function kills execution immediately.
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*
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* @param $errorMsg String fully-escaped HTML
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*/
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function wfDie( $errorMsg ){
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// Use the version set in DefaultSettings if possible, but don't rely on it
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global $wgVersion, $wgLogo;
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$version = isset( $wgVersion ) && $wgVersion
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? htmlspecialchars( $wgVersion )
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: '';
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$logo = isset( $wgLogo ) && $wgLogo
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? $wgLogo
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: 'http://upload.wikimedia.org/wikipedia/commons/1/1c/MediaWiki_logo.png';
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header( $_SERVER['SERVER_PROTOCOL'] . ' 500 MediaWiki configuration Error', true, 500 );
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header( 'Content-type: text/html; charset=UTF-8' );
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// Don't cache error pages! They cause no end of trouble...
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header( 'Cache-control: none' );
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header( 'Pragma: nocache' );
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?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns='http://www.w3.org/1999/xhtml' lang='en'>
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<head>
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<title>MediaWiki <?php echo $version; ?></title>
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<meta http-equiv='Content-Type' content='text/html; charset=utf-8' />
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<style type='text/css' media='screen'>
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body {
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color: #000;
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background-color: #fff;
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font-family: sans-serif;
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padding: 2em;
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text-align: center;
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}
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p, img, h1 {
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text-align: left;
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margin: 0.5em 0;
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}
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h1 {
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font-size: 120%;
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}
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</style>
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</head>
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<body>
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<img src="<?php echo $logo; ?>" alt='The MediaWiki logo' />
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<h1>MediaWiki <?php echo $version; ?> internal error</h1>
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<div class='error'> <?php echo $errorMsg; ?> </div>
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</body>
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</html>
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<?php
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die( 1 );
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}
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