RawAction.php

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<?php
class RawAction extends FormlessAction {
    private $gen = false;

    public function getName() {
        return 'raw';
    }

    public function requiresWrite() {
        return false;
    }

    public function requiresUnblock() {
        return false;
    }

    function onView() {
        $this->getOutput()->disable();
        $request = $this->getRequest();
        $config = $this->context->getConfig();

        if ( !$request->checkUrlExtension() ) {
            return;
        }

        if ( $this->getOutput()->checkLastModified( $this->page->getTouched() ) ) {
            return; // Client cache fresh and headers sent, nothing more to do.
        }

        # special case for 'generated' raw things: user css/js
        # This is deprecated and will only return empty content
        $gen = $request->getVal( 'gen' );
        $smaxage = $request->getIntOrNull( 'smaxage' );

        if ( $gen == 'css' || $gen == 'js' ) {
            $this->gen = true;
            if ( $smaxage === null ) {
                $smaxage = $config->get( 'SquidMaxage' );
            }
        }

        $contentType = $this->getContentType();

        # Force caching for CSS and JS raw content, default: 5 minutes.
        # Note: If using a canonical url for userpage css/js, we send an HTCP purge.
        if ( $smaxage === null ) {
            if ( $contentType == 'text/css' || $contentType == 'text/javascript' ) {
                $smaxage = intval( $config->get( 'ForcedRawSMaxage' ) );
            } else {
                $smaxage = 0;
            }
        }

        $maxage = $request->getInt( 'maxage', $config->get( 'SquidMaxage' ) );

        $response = $request->response();

        $response->header( 'Content-type: ' . $contentType . '; charset=UTF-8' );
        # Output may contain user-specific data;
        # vary generated content for open sessions on private wikis
        $privateCache = !User::isEveryoneAllowed( 'read' ) && ( $smaxage == 0 || session_id() != '' );
        // Bug 53032 - make this private if user is logged in,
        // so we don't accidentally cache cookies
        $privateCache = $privateCache ?: $this->getUser()->isLoggedIn();
        # allow the client to cache this for 24 hours
        $mode = $privateCache ? 'private' : 'public';
        $response->header(
            'Cache-Control: ' . $mode . ', s-maxage=' . $smaxage . ', max-age=' . $maxage
        );

        $text = $this->getRawText();

        if ( $text === false && $contentType == '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.
            $response->header( 'HTTP/1.x 404 Not Found' );
        }

        if ( !wfRunHooks( 'RawPageViewBeforeOutput', array( &$this, &$text ) ) ) {
            wfDebug( __METHOD__ . ": RawPageViewBeforeOutput hook broke raw page output.\n" );
        }

        echo $text;
    }

    public function getRawText() {
        global $wgParser;

        # No longer used
        if ( $this->gen ) {
            return '';
        }

        $text = false;
        $title = $this->getTitle();
        $request = $this->getRequest();

        // If it's a MediaWiki message we can just hit the message cache
        if ( $request->getBool( 'usemsgcache' ) && $title->getNamespace() == NS_MEDIAWIKI ) {
            // The first "true" is to use the database, the second is to use
            // the content langue and the last one is to specify the message
            // key already contains the language in it ("/de", etc.).
            $text = MessageCache::singleton()->get( $title->getDBkey(), true, true, true );
            // If the message doesn't exist, return a blank
            if ( $text === false ) {
                $text = '';
            }
        } else {
            // Get it from the DB
            $rev = Revision::newFromTitle( $title, $this->getOldId() );
            if ( $rev ) {
                $lastmod = wfTimestamp( TS_RFC2822, $rev->getTimestamp() );
                $request->response()->header( "Last-modified: $lastmod" );

                // Public-only due to cache headers
                $content = $rev->getContent();

                if ( $content === null ) {
                    // revision not found (or suppressed)
                    $text = false;
                } elseif ( !$content instanceof TextContent ) {
                    // non-text content
                    wfHttpError( 415, "Unsupported Media Type", "The requested page uses the content model `"
                        . $content->getModel() . "` which is not supported via this interface." );
                    die();
                } else {
                    // want a section?
                    $section = $request->getIntOrNull( 'section' );
                    if ( $section !== null ) {
                        $content = $content->getSection( $section );
                    }

                    if ( $content === null || $content === false ) {
                        // section not found (or section not supported, e.g. for JS and CSS)
                        $text = false;
                    } else {
                        $text = $content->getNativeData();
                    }
                }
            }
        }

        if ( $text !== false && $text !== '' && $request->getVal( 'templates' ) === 'expand' ) {
            $text = $wgParser->preprocess(
                $text,
                $title,
                ParserOptions::newFromContext( $this->getContext() )
            );
        }

        return $text;
    }

    public function getOldId() {
        $oldid = $this->getRequest()->getInt( 'oldid' );
        switch ( $this->getRequest()->getText( 'direction' ) ) {
            case 'next':
                # output next revision, or nothing if there isn't one
                $nextid = 0;
                if ( $oldid ) {
                    $nextid = $this->getTitle()->getNextRevisionID( $oldid );
                }
                $oldid = $nextid ?: -1;
                break;
            case 'prev':
                # output previous revision, or nothing if there isn't one
                if ( !$oldid ) {
                    # get the current revision so we can get the penultimate one
                    $oldid = $this->page->getLatest();
                }
                $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
                $oldid = $previd ?: -1;
                break;
            case 'cur':
                $oldid = 0;
                break;
        }

        return $oldid;
    }

    public function getContentType() {
        $ctype = $this->getRequest()->getVal( 'ctype' );

        if ( $ctype == '' ) {
            $gen = $this->getRequest()->getVal( 'gen' );
            if ( $gen == 'js' ) {
                $ctype = 'text/javascript';
            } elseif ( $gen == 'css' ) {
                $ctype = 'text/css';
            }
        }

        $allowedCTypes = array( 'text/x-wiki', 'text/javascript', 'text/css', 'application/x-zope-edit' );
        if ( $ctype == '' || !in_array( $ctype, $allowedCTypes ) ) {
            $ctype = 'text/x-wiki';
        }

        return $ctype;
    }
}