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<?php
/**
* Raw page text accessor
*
* Copyright © 2004 Gabriel Wicke <wicke@wikidev.net>
* http://wikidev.net/
*
* Based on HistoryPage and SpecialExport
*
* License: GPL (http://www.gnu.org/copyleft/gpl.html)
*
* @author Gabriel Wicke <wicke@wikidev.net>
* @file
*/
/**
* A simple method to retrieve the plain source of an article,
* using "action=raw" in the GET request string.
*/
class RawPage {
var $mArticle, $mTitle, $mRequest;
var $mOldId, $mGen, $mCharset, $mSection;
var $mSmaxage, $mMaxage;
var $mContentType, $mExpandTemplates;
function __construct( Page $article, $request = false ) {
global $wgRequest, $wgSquidMaxage, $wgJsMimeType, $wgGroupPermissions;
$allowedCTypes = array( 'text/x-wiki', $wgJsMimeType, 'text/css', 'application/x-zope-edit' );
$this->mArticle = $article;
$this->mTitle = $article->getTitle();
if( $request === false ) {
$this->mRequest = $wgRequest;
} else {
$this->mRequest = $request;
}
$ctype = $this->mRequest->getVal( 'ctype' );
$smaxage = $this->mRequest->getIntOrNull( 'smaxage' );
$maxage = $this->mRequest->getInt( 'maxage', $wgSquidMaxage );
$this->mExpandTemplates = $this->mRequest->getVal( 'templates' ) === 'expand';
$this->mUseMessageCache = $this->mRequest->getBool( 'usemsgcache' );
$this->mSection = $this->mRequest->getIntOrNull( 'section' );
$oldid = $this->mRequest->getInt( 'oldid' );
switch( $wgRequest->getText( 'direction' ) ) {
case 'next':
# output next revision, or nothing if there isn't one
if( $oldid ) {
$oldid = $this->mTitle->getNextRevisionId( $oldid );
}
$oldid = $oldid ? $oldid : -1;
break;
case 'prev':
# output previous revision, or nothing if there isn't one
if( !$oldid ) {
# get the current revision so we can get the penultimate one
$this->mArticle->getTouched();
$oldid = $this->mArticle->getLatest();
}
$prev = $this->mTitle->getPreviousRevisionId( $oldid );
$oldid = $prev ? $prev : -1 ;
break;
case 'cur':
$oldid = 0;
break;
}
$this->mOldId = $oldid;
# special case for 'generated' raw things: user css/js
$gen = $this->mRequest->getVal( 'gen' );
if( $gen == 'css' ) {
$this->mGen = $gen;
if( is_null( $smaxage ) ) {
$smaxage = $wgSquidMaxage;
}
if( $ctype == '' ) {
$ctype = 'text/css';
}
} elseif( $gen == 'js' ) {
$this->mGen = $gen;
if( is_null( $smaxage ) ) $smaxage = $wgSquidMaxage;
if($ctype == '') $ctype = $wgJsMimeType;
} else {
$this->mGen = false;
}
$this->mCharset = 'UTF-8';
# Force caching for CSS and JS raw content, default: 5 minutes
if( is_null( $smaxage ) && ( $ctype == 'text/css' || $ctype == $wgJsMimeType ) ) {
global $wgForcedRawSMaxage;
$this->mSmaxage = intval( $wgForcedRawSMaxage );
} else {
$this->mSmaxage = intval( $smaxage );
}
$this->mMaxage = $maxage;
# Output may contain user-specific data;
# vary generated content for open sessions and private wikis
if( $this->mGen || !$wgGroupPermissions['*']['read'] ) {
$this->mPrivateCache = $this->mSmaxage == 0 || session_id() != '';
} else {
$this->mPrivateCache = false;
}
if( $ctype == '' || !in_array( $ctype, $allowedCTypes ) ) {
$this->mContentType = 'text/x-wiki';
} else {
$this->mContentType = $ctype;
}
}
function view() {
global $wgOut, $wgRequest;
if( !$wgRequest->checkUrlExtension() ) {
$wgOut->disable();
return;
}
header( 'Content-type: ' . $this->mContentType . '; charset=' . $this->mCharset );
# allow the client to cache this for 24 hours
$mode = $this->mPrivateCache ? 'private' : 'public';
header( 'Cache-Control: ' . $mode . ', s-maxage=' . $this->mSmaxage . ', max-age=' . $this->mMaxage );
global $wgUseFileCache;
if( $wgUseFileCache && HTMLFileCache::useFileCache() ) {
$cache = new HTMLFileCache( $this->mTitle, 'raw' );
if( $cache->isFileCacheGood( /* Assume up to date */ ) ) {
$cache->loadFromFileCache();
$wgOut->disable();
return;
} else {
ob_start( array( &$cache, 'saveToFileCache' ) );
}
}
$text = $this->getRawText();
if( !wfRunHooks( 'RawPageViewBeforeOutput', array( &$this, &$text ) ) ) {
wfDebug( __METHOD__ . ": RawPageViewBeforeOutput hook broke raw page output.\n" );
}
echo $text;
$wgOut->disable();
}
function getRawText() {
global $wgOut, $wgUser;
if( $this->mGen ) {
$sk = $wgUser->getSkin();
if( !StubObject::isRealObject( $wgOut ) ) {
$wgOut->_unstub( 2 );
}
$sk->initPage( $wgOut );
if( $this->mGen == 'css' ) {
return $sk->generateUserStylesheet();
} elseif( $this->mGen == 'js' ) {
return $sk->generateUserJs();
}
} else {
return $this->getArticleText();
}
}
function getArticleText() {
$found = false;
$text = '';
if( $this->mTitle ) {
// If it's a MediaWiki message we can just hit the message cache
if( $this->mUseMessageCache && $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
$key = $this->mTitle->getDBkey();
$msg = wfMessage( $key )->inContentLanguage();
# If the message doesn't exist, return a blank
$text = !$msg->exists() ? '' : $msg->plain();
$found = true;
} else {
// Get it from the DB
$rev = Revision::newFromTitle( $this->mTitle, $this->mOldId );
if( $rev ) {
$lastmod = wfTimestamp( TS_RFC2822, $rev->getTimestamp() );
header( "Last-modified: $lastmod" );
if( !is_null( $this->mSection ) ) {
global $wgParser;
$text = $wgParser->getSection( $rev->getText(), $this->mSection );
} else {
$text = $rev->getText();
}
$found = true;
}
}
}
# Bad title or page does not exist
if( !$found && $this->mContentType == 'text/x-wiki' ) {
# Don't return a 404 response for CSS or JavaScript;
# 404s aren't generally cached and it would create
# extra hits when user CSS/JS are on and the user doesn't
# have the pages.
header( 'HTTP/1.0 404 Not Found' );
}
return $this->parseArticleText( $text );
}
/**
* @param $text
* @return string
*/
function parseArticleText( $text ) {
if( $text === '' ) {
return '';
} else {
if( $this->mExpandTemplates ) {
global $wgParser;
return $wgParser->preprocess( $text, $this->mTitle, new ParserOptions() );
} else {
return $text;
}
}
}
}
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