Exemplo n.º 1
0
 /** Set the cache control headers in the HTTP response.
  */
 function cacheControl($strategy = CACHE_CONTROL, $max_age = CACHE_CONTROL_MAX_AGE)
 {
     if ($strategy == 'NO_CACHE') {
         $cache_control = "no-cache";
         // better set private. See Pear HTTP_Header
         $max_age = -20;
     } elseif ($strategy == 'ALLOW_STALE' && $max_age > 0) {
         $cache_control = sprintf("max-age=%d", $max_age);
     } else {
         $cache_control = "must-revalidate";
         $max_age = -20;
     }
     header("Cache-Control: {$cache_control}");
     header("Expires: " . Rfc1123DateTime(time() + $max_age));
     header("Vary: Cookie");
     // FIXME: add more here?
 }
Exemplo n.º 2
0
function displayPage(&$request, $template = false)
{
    global $WikiTheme;
    global $robots;
    $pagename = $request->getArg('pagename');
    $version = $request->getArg('version');
    $page = $request->getPage();
    if ($version) {
        $revision = $page->getRevision($version);
        if (!$revision) {
            NoSuchRevision($request, $page, $version);
        }
        /* Tell Google (and others) to ignore old versions of pages */
        $robots = "noindex,nofollow";
        $toks['ROBOTS_META'] = $robots;
    } else {
        $revision = $page->getCurrentRevision();
    }
    $format = $request->getArg('format');
    if ($format == 'xml') {
        // fast ajax: include page content asynchronously
        global $charset;
        header("Content-Type: text/xml");
        echo "<", "?xml version=\"1.0\" encoding=\"{$charset}\"?", ">\n";
        // DOCTYPE html needed to allow unencoded entities like &nbsp; without !CDATA[]
        echo '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">', "\n";
        if ($page->exists()) {
            header("Last-Modified: " . Rfc1123DateTime($revision->get('mtime')));
            $request->cacheControl();
            $request->setArg('format', '');
            $page_content = $revision->getTransformedContent();
            $page_content->printXML();
            $request->_is_buffering_output = false;
            // avoid wrong Content-Length with errors
            $request->finish();
        } else {
            $request->cacheControl();
            echo '<div style="display:none;" />';
            $request->_is_buffering_output = false;
            // avoid wrong Content-Length with errors
            $request->finish();
            exit;
        }
    }
    if (isSubPage($pagename)) {
        $pages = explode(SUBPAGE_SEPARATOR, $pagename);
        $last_page = array_pop($pages);
        // deletes last element from array as side-effect
        $pageheader = HTML::span(HTML::a(array('href' => WikiURL($pages[0]), 'class' => 'pagetitle'), $WikiTheme->maybeSplitWikiWord($pages[0] . SUBPAGE_SEPARATOR)));
        $first_pages = $pages[0] . SUBPAGE_SEPARATOR;
        array_shift($pages);
        foreach ($pages as $p) {
            $pageheader->pushContent(HTML::a(array('href' => WikiURL($first_pages . $p), 'class' => 'backlinks'), $WikiTheme->maybeSplitWikiWord($p . SUBPAGE_SEPARATOR)));
            $first_pages .= $p . SUBPAGE_SEPARATOR;
        }
        $backlink = HTML::a(array('href' => WikiURL($pagename, array('action' => _("BackLinks"))), 'class' => 'backlinks'), $WikiTheme->maybeSplitWikiWord($last_page));
        $backlink->addTooltip(sprintf(_("BackLinks for %s"), $pagename));
        $pageheader->pushContent($backlink);
    } else {
        $pageheader = HTML::a(array('href' => WikiURL($pagename, array('action' => _("BackLinks"))), 'class' => 'backlinks'), $WikiTheme->maybeSplitWikiWord($pagename));
        $pageheader->addTooltip(sprintf(_("BackLinks for %s"), $pagename));
        if ($request->getArg('frame')) {
            $pageheader->setAttr('target', '_top');
        }
    }
    $pagetitle = SplitPagename($pagename);
    if ($redirect_from = $request->getArg('redirectfrom')) {
        $redirect_message = HTML::span(array('class' => 'redirectfrom'), fmt("(Redirected from %s)", RedirectorLink($redirect_from)));
        // abuse the $redirected template var for some status update notice
    } elseif ($request->getArg('errormsg')) {
        $redirect_message = $request->getArg('errormsg');
        $request->setArg('errormsg', false);
    }
    $request->appendValidators(array('pagerev' => $revision->getVersion(), '%mtime' => $revision->get('mtime')));
    /*
        // FIXME: This is also in the template...
        if ($request->getArg('action') != 'pdf' and !headers_sent()) {
          // FIXME: enable MathML/SVG/... support
          if (ENABLE_XHTML_XML
                 and (!isBrowserIE()
                      and strstr($request->get('HTTP_ACCEPT'),'application/xhtml+xml')))
                header("Content-Type: application/xhtml+xml; charset=" . $GLOBALS['charset']);
            else
                header("Content-Type: text/html; charset=" . $GLOBALS['charset']);
        }
    */
    $toks['TITLE'] = $pagetitle;
    // <title> tag
    $toks['HEADER'] = $pageheader;
    // h1 with backlink
    $toks['revision'] = $revision;
    // On external searchengine (google) referrer, highlight the searchterm and
    // pass through the Searchhighlight actionpage.
    if ($result = isExternalReferrer($request)) {
        if (!empty($result['query'])) {
            if (ENABLE_SEARCHHIGHLIGHT) {
                $request->_searchhighlight = $result;
                $request->appendValidators(array('%mtime' => time()));
                // force no cache(?)
                // Should be changed to check the engine and search term only
                // $request->setArg('nocache', 1);
                $page_content = new TransformedText($revision->getPage(), $revision->getPackedContent(), $revision->getMetaData());
                /* Now add the SearchHighlight plugin to the top of the page, in memory only.
                		   You can parametrize this by changing the SearchHighlight action page.
                		*/
                if ($actionpage = $request->findActionPage('SearchHighlight')) {
                    $actionpage = $request->getPage($actionpage);
                    $actionrev = $actionpage->getCurrentRevision();
                    $pagetitle = HTML(fmt("%s: %s", $actionpage->getName(), $WikiTheme->linkExistingWikiWord($pagename, false, $version)));
                    $request->appendValidators(array('actionpagerev' => $actionrev->getVersion(), '%mtime' => $actionrev->get('mtime')));
                    $toks['SEARCH_ENGINE'] = $result['engine'];
                    $toks['SEARCH_ENGINE_URL'] = $result['engine_url'];
                    $toks['SEARCH_TERM'] = $result['query'];
                    //$toks['HEADER'] = HTML($actionpage->getName(),": ",$pageheader); // h1 with backlink
                    $actioncontent = new TransformedText($actionrev->getPage(), $actionrev->getPackedContent(), $actionrev->getMetaData());
                    // prepend the actionpage in front of the hightlighted content
                    $toks['CONTENT'] = HTML($actioncontent, $page_content);
                }
            }
        } else {
            $page_content = $revision->getTransformedContent();
        }
    } else {
        $page_content = $revision->getTransformedContent();
    }
    /* Check for special pagenames, which are no actionpages. */
    /*
    if ( $pagename == _("RecentVisitors")) {
        $robots = "noindex,follow";
        $toks['ROBOTS_META'] = $robots;
    } else
    */
    if ($pagename == _("SandBox")) {
        $robots = "noindex,nofollow";
        $toks['ROBOTS_META'] = $robots;
    } else {
        if (isActionPage($pagename)) {
            // AllPages must not be indexed, but must be followed to get all pages
            $robots = "noindex,follow";
            $toks['ROBOTS_META'] = $robots;
        } else {
            if (!isset($toks['ROBOTS_META'])) {
                $robots = "index,follow";
                $toks['ROBOTS_META'] = $robots;
            }
        }
    }
    if (!isset($toks['CONTENT'])) {
        $toks['CONTENT'] = new Template('browse', $request, $page_content);
    }
    if (!empty($redirect_message)) {
        $toks['redirected'] = $redirect_message;
    }
    // Massive performance problem parsing at run-time into all xml objects
    // looking for p's. Should be optional, if not removed at all.
    //$toks['PAGE_DESCRIPTION'] = $page_content->getDescription();
    $toks['PAGE_KEYWORDS'] = GleanKeywords($page);
    if (!$template) {
        $template = new Template('html', $request);
    }
    // Handle other formats: So far we had html only.
    // xml is requested by loaddump, rss is handled by RecentChanges,
    // pdf is a special action, but should be a format to dump multiple pages
    // if the actionpage plugin returns a pagelist.
    // rdf, owl, kbmodel, daml, ... are handled by SemanticWeb.
    /* Only single page versions. rss only if not already handled by RecentChanges.
     */
    if (!$format or $format == 'html' or $format == 'sidebar' or $format == 'contribs') {
        $template->printExpansion($toks);
    } else {
        // No pagelist here. Single page version only
        require_once "lib/PageList.php";
        $pagelist = new PageList();
        $pagelist->addPage($page);
        if ($format == 'pdf') {
            require_once "lib/pdf.php";
            $request->setArg('format', '');
            ConvertAndDisplayPdfPageList($request, $pagelist);
            // time-sorted rdf a la RecentChanges
        } elseif (in_array($format, array("rss91", "rss2", "rss", "atom"))) {
            //$request->setArg('format','');
            if ($pagename == _("RecentChanges")) {
                $template->printExpansion($toks);
            } else {
                require_once "lib/plugin/RecentChanges.php";
                $plugin = new WikiPlugin_RecentChanges();
                $args = $request->getArgs();
                return $plugin->format($plugin->getChanges($request->_dbi, $args), $args);
            }
        } elseif ($format == 'rdf') {
            // all semantic relations and attributes
            require_once "lib/SemanticWeb.php";
            $rdf = new RdfWriter($request, $pagelist);
            $rdf->format();
        } elseif ($format == 'owl') {
            // or daml?
            require_once "lib/SemanticWeb.php";
            $rdf = new OwlWriter($request, $pagelist);
            $rdf->format();
        } elseif ($format == 'json') {
            // include page content asynchronously
            $request->setArg('format', '');
            if ($page->exists()) {
                $content = $page_content->asXML();
            } else {
                $content = '';
            }
            $req_args = $request->args;
            unset($req_args['format']);
            // no meta-data so far, just the content
            $json = array('content' => $content, 'args' => $req_args, 'phpwiki-version' => PHPWIKI_VERSION);
            if (loadPhpExtension('json')) {
                $json_enc = json_encode($json);
            } else {
                require_once "lib/pear/JSON.php";
                $j = new Services_JSON();
                $json_enc = $j->encode($json);
            }
            header("Content-Type: application/json");
            die($json_enc);
        } else {
            if (!in_array($pagename, array(_("LinkDatabase")))) {
                trigger_error(sprintf(_("Unsupported argument: %s=%s"), "format", $format), E_USER_WARNING);
            }
            $template->printExpansion($toks);
        }
    }
    $page->increaseHitCount();
    if ($request->getArg('action') != 'pdf') {
        $request->checkValidators();
        flush();
    }
    return '';
}