bed65d358b
Raw page access was failing in some server configurations with CGI (or in my case, FastCGI). This gives a nicer and more correct error message. Possibly better solutions: 1) Figure out how to do this without PHP_SELF. 2) Give a warning or error on installation, or even on every page view, since this will break all raw page viewing. I ran into this when doing a file copy of my wiki install to another site, FWIW. Even with the new error message, I'd have had to look at the CSS files to figure out what the problem was (the user-visible symptom was that custom styles didn't work).
265 lines
7.9 KiB
PHP
265 lines
7.9 KiB
PHP
<?php
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/**
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* Copyright (C) 2004 Gabriel Wicke <wicke@wikidev.net>
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* http://wikidev.net/
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* Based on PageHistory and SpecialExport
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*
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* License: GPL (http://www.gnu.org/copyleft/gpl.html)
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*
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* @author Gabriel Wicke <wicke@wikidev.net>
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* @file
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*/
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/**
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* A simple method to retrieve the plain source of an article,
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* using "action=raw" in the GET request string.
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*/
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class RawPage {
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var $mArticle, $mTitle, $mRequest;
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var $mOldId, $mGen, $mCharset, $mSection;
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var $mSmaxage, $mMaxage;
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var $mContentType, $mExpandTemplates;
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function __construct( &$article, $request = false ) {
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global $wgRequest, $wgInputEncoding, $wgSquidMaxage, $wgJsMimeType, $wgGroupPermissions;
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$allowedCTypes = array('text/x-wiki', $wgJsMimeType, 'text/css', 'application/x-zope-edit');
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$this->mArticle =& $article;
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$this->mTitle =& $article->mTitle;
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if( $request === false ) {
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$this->mRequest =& $wgRequest;
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} else {
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$this->mRequest = $request;
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}
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$ctype = $this->mRequest->getVal( 'ctype' );
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$smaxage = $this->mRequest->getIntOrNull( 'smaxage' );
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$maxage = $this->mRequest->getInt( 'maxage', $wgSquidMaxage );
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$this->mExpandTemplates = $this->mRequest->getVal( 'templates' ) === 'expand';
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$this->mUseMessageCache = $this->mRequest->getBool( 'usemsgcache' );
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$this->mSection = $this->mRequest->getIntOrNull( 'section' );
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$oldid = $this->mRequest->getInt( 'oldid' );
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switch( $wgRequest->getText( 'direction' ) ) {
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case 'next':
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# output next revision, or nothing if there isn't one
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if( $oldid ) {
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$oldid = $this->mTitle->getNextRevisionId( $oldid );
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}
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$oldid = $oldid ? $oldid : -1;
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break;
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case 'prev':
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# output previous revision, or nothing if there isn't one
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if( ! $oldid ) {
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# get the current revision so we can get the penultimate one
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$this->mArticle->getTouched();
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$oldid = $this->mArticle->mLatest;
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}
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$prev = $this->mTitle->getPreviousRevisionId( $oldid );
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$oldid = $prev ? $prev : -1 ;
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break;
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case 'cur':
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$oldid = 0;
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break;
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}
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$this->mOldId = $oldid;
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# special case for 'generated' raw things: user css/js
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$gen = $this->mRequest->getVal( 'gen' );
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if( $gen == 'css' ) {
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$this->mGen = $gen;
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if( is_null( $smaxage ) ) $smaxage = $wgSquidMaxage;
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if($ctype == '') $ctype = 'text/css';
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} elseif( $gen == 'js' ) {
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$this->mGen = $gen;
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if( is_null( $smaxage ) ) $smaxage = $wgSquidMaxage;
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if($ctype == '') $ctype = $wgJsMimeType;
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} else {
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$this->mGen = false;
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}
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$this->mCharset = $wgInputEncoding;
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# Force caching for CSS and JS raw content, default: 5 minutes
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if( is_null($smaxage) and ($ctype=='text/css' or $ctype==$wgJsMimeType) ) {
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global $wgForcedRawSMaxage;
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$this->mSmaxage = intval($wgForcedRawSMaxage);
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} else {
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$this->mSmaxage = intval( $smaxage );
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}
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$this->mMaxage = $maxage;
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# Output may contain user-specific data;
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# vary generated content for open sessions and private wikis
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if( $this->mGen or !$wgGroupPermissions['*']['read'] ) {
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$this->mPrivateCache = $this->mSmaxage == 0 || session_id() != '';
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} else {
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$this->mPrivateCache = false;
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}
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if( $ctype == '' or ! in_array( $ctype, $allowedCTypes ) ) {
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$this->mContentType = 'text/x-wiki';
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} else {
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$this->mContentType = $ctype;
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}
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}
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function view() {
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global $wgOut, $wgScript;
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if( isset( $_SERVER['SCRIPT_URL'] ) ) {
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# Normally we use PHP_SELF to get the URL to the script
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# as it was called, minus the query string.
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#
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# Some sites use Apache rewrite rules to handle subdomains,
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# and have PHP set up in a weird way that causes PHP_SELF
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# to contain the rewritten URL instead of the one that the
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# outside world sees.
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#
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# If in this mode, use SCRIPT_URL instead, which mod_rewrite
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# provides containing the "before" URL.
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$url = $_SERVER['SCRIPT_URL'];
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} else {
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$url = $_SERVER['PHP_SELF'];
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}
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if( $url == '' ) {
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# This will make the next check fail with a confusing error
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# message, so we should mention it separately.
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wfHttpError( 500, 'Internal Server Error',
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"\$_SERVER['PHP_SELF'] is not set. Perhaps you're using CGI" .
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" and haven't set cgi.fix_pathinfo = 1 in php.ini?" );
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return;
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}
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if( strcmp( $wgScript, $url ) ) {
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# Internet Explorer will ignore the Content-Type header if it
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# thinks it sees a file extension it recognizes. Make sure that
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# all raw requests are done through the script node, which will
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# have eg '.php' and should remain safe.
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#
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# We used to redirect to a canonical-form URL as a general
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# backwards-compatibility / good-citizen nice thing. However
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# a lot of servers are set up in buggy ways, resulting in
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# redirect loops which hang the browser until the CSS load
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# times out.
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#
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# Just return a 403 Forbidden and get it over with.
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wfHttpError( 403, 'Forbidden',
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'Raw pages must be accessed through the primary script entry point.' );
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return;
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}
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header( "Content-type: ".$this->mContentType.'; charset='.$this->mCharset );
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# allow the client to cache this for 24 hours
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$mode = $this->mPrivateCache ? 'private' : 'public';
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header( 'Cache-Control: '.$mode.', s-maxage='.$this->mSmaxage.', max-age='.$this->mMaxage );
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if( HTMLFileCache::useFileCache() ) {
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$cache = new HTMLFileCache( $this->mTitle, 'raw' );
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if( $cache->isFileCacheGood( /* Assume up to date */ ) ) {
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$cache->loadFromFileCache();
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$wgOut->disable();
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return;
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} else {
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ob_start( array(&$cache, 'saveToFileCache' ) );
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}
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}
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$text = $this->getRawText();
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if( !wfRunHooks( 'RawPageViewBeforeOutput', array( &$this, &$text ) ) ) {
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wfDebug( __METHOD__ . ": RawPageViewBeforeOutput hook broke raw page output.\n" );
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}
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echo $text;
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$wgOut->disable();
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}
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function getRawText() {
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global $wgUser, $wgOut, $wgRequest;
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if( $this->mGen ) {
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$sk = $wgUser->getSkin();
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if( !StubObject::isRealObject( $wgOut ) )
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$wgOut->_unstub( 2 );
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$sk->initPage( $wgOut );
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if( $this->mGen == 'css' ) {
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return $sk->generateUserStylesheet();
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} else if( $this->mGen == 'js' ) {
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return $sk->generateUserJs();
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}
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} else {
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return $this->getArticleText();
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}
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}
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function getArticleText() {
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$found = false;
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$text = '';
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if( $this->mTitle ) {
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// If it's a MediaWiki message we can just hit the message cache
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if( $this->mUseMessageCache && $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
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$key = $this->mTitle->getDBkey();
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$text = wfMsgForContentNoTrans( $key );
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# If the message doesn't exist, return a blank
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if( wfEmptyMsg( $key, $text ) )
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$text = '';
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$found = true;
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} else {
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// Get it from the DB
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$rev = Revision::newFromTitle( $this->mTitle, $this->mOldId );
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if( $rev ) {
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$lastmod = wfTimestamp( TS_RFC2822, $rev->getTimestamp() );
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header( "Last-modified: $lastmod" );
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if( !is_null($this->mSection ) ) {
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global $wgParser;
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$text = $wgParser->getSection ( $rev->getText(), $this->mSection );
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} else
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$text = $rev->getText();
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$found = true;
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}
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}
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}
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# Bad title or page does not exist
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if( !$found && $this->mContentType == 'text/x-wiki' ) {
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# Don't return a 404 response for CSS or JavaScript;
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# 404s aren't generally cached and it would create
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# extra hits when user CSS/JS are on and the user doesn't
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# have the pages.
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header( "HTTP/1.0 404 Not Found" );
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}
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// Special-case for empty CSS/JS
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//
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// Internet Explorer for Mac handles empty files badly;
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// particularly so when keep-alive is active. It can lead
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// to long timeouts as it seems to sit there waiting for
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// more data that never comes.
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//
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// Give it a comment...
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if( strlen( $text ) == 0 &&
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($this->mContentType == 'text/css' ||
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$this->mContentType == 'text/javascript' ) ) {
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return "/* Empty */";
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}
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return $this->parseArticleText( $text );
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}
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function parseArticleText( $text ) {
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if( $text === '' )
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return '';
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else
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if( $this->mExpandTemplates ) {
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global $wgParser;
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return $wgParser->preprocess( $text, $this->mTitle, new ParserOptions() );
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} else
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return $text;
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}
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}
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