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<?php
/**
* Copyright (C) 2004 Gabriel Wicke <wicke@wikidev.net>
* http://wikidev.net/
* Based on PageHistory 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, $mExpandTemplates;
function __construct( &$article, $request = false ) {
global $wgRequest, $wgInputEncoding, $wgSquidMaxage, $wgJsMimeType, $wgForcedRawSMaxage, $wgGroupPermissions;
$allowedCTypes = array('text/x-wiki', $wgJsMimeType, 'text/css', 'application/x-zope-edit');
$this->mArticle =& $article;
$this->mTitle =& $article->mTitle;
if ( $request === false ) {
$this->mRequest =& $wgRequest;
} else {
$this->mRequest = $request;
}
$ctype = $this->mRequest->getVal( 'ctype' );
$smaxage = $this->mRequest->getIntOrNull( 'smaxage', $wgSquidMaxage );
$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->mLatest;
}
$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 = $wgInputEncoding;
# Force caching for CSS and JS raw content, default: 5 minutes
if (is_null($smaxage) and ($ctype=='text/css' or $ctype==$wgJsMimeType)) {
$this->mSmaxage = intval($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 or !$wgGroupPermissions['*']['read']) {
$this->mPrivateCache = ( $this->mSmaxage == 0 ) ||
( session_id() != '' );
} else {
$this->mPrivateCache = false;
}
if ( $ctype == '' or ! in_array( $ctype, $allowedCTypes ) ) {
$this->mContentType = 'text/x-wiki';
} else {
$this->mContentType = $ctype;
}
}
function view() {
global $wgOut, $wgScript;
if( isset( $_SERVER['SCRIPT_URL'] ) ) {
# Normally we use PHP_SELF to get the URL to the script
# as it was called, minus the query string.
#
# Some sites use Apache rewrite rules to handle subdomains,
# and have PHP set up in a weird way that causes PHP_SELF
# to contain the rewritten URL instead of the one that the
# outside world sees.
#
# If in this mode, use SCRIPT_URL instead, which mod_rewrite
# provides containing the "before" URL.
$url = $_SERVER['SCRIPT_URL'];
} else {
$url = $_SERVER['PHP_SELF'];
}
if( strcmp( $wgScript, $url ) ) {
# Internet Explorer will ignore the Content-Type header if it
# thinks it sees a file extension it recognizes. Make sure that
# all raw requests are done through the script node, which will
# have eg '.php' and should remain safe.
#
# We used to redirect to a canonical-form URL as a general
# backwards-compatibility / good-citizen nice thing. However
# a lot of servers are set up in buggy ways, resulting in
# redirect loops which hang the browser until the CSS load
# times out.
#
# Just return a 403 Forbidden and get it over with.
wfHttpError( 403, 'Forbidden',
'Raw pages must be accessed through the primary script entry point.' );
return;
}
header( "Content-type: ".$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 );
$text = $this->getRawText();
if( !wfRunHooks( 'RawPageViewBeforeOutput', array( &$this, &$text ) ) ) {
wfDebug( __METHOD__ . ': RawPageViewBeforeOutput hook broke raw page output.' );
}
echo $text;
$wgOut->disable();
}
function getRawText() {
global $wgUser, $wgOut, $wgRequest;
if($this->mGen) {
$sk = $wgUser->getSkin();
$sk->initPage($wgOut);
if($this->mGen == 'css') {
return $sk->getUserStylesheet();
} else if($this->mGen == 'js') {
return $sk->getUserJs();
}
} 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();
$text = wfMsgForContentNoTrans( $key );
# If the message doesn't exist, return a blank
if( wfEmptyMsg( $key, $text ) )
$text = '';
$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" );
}
// Special-case for empty CSS/JS
//
// Internet Explorer for Mac handles empty files badly;
// particularly so when keep-alive is active. It can lead
// to long timeouts as it seems to sit there waiting for
// more data that never comes.
//
// Give it a comment...
if( strlen( $text ) == 0 &&
($this->mContentType == 'text/css' ||
$this->mContentType == 'text/javascript' ) ) {
return "/* Empty */";
}
return $this->parseArticleText( $text );
}
function parseArticleText( $text ) {
if ( $text === '' )
return '';
else
if ( $this->mExpandTemplates ) {
global $wgParser;
return $wgParser->preprocess( $text, $this->mTitle, new ParserOptions() );
} else
return $text;
}
}
|
