function init()
 {
     if (!is_dir('store')) {
         os_mkdir('store', STORAGE_DEFAULT_PERMISSIONS, false);
     }
     $which = null;
     if (argc() > 1) {
         $which = argv(1);
     }
     $profile = 0;
     \App::$page['htmlhead'] .= '<link rel="alternate" type="application/atom+xml" href="' . z_root() . '/feed/' . $which . '" />' . "\r\n";
     if ($which) {
         profile_load($which, $profile);
     }
     $auth = new \Zotlabs\Storage\BasicAuth();
     $ob_hash = get_observer_hash();
     if ($ob_hash) {
         if (local_channel()) {
             $channel = \App::get_channel();
             $auth->setCurrentUser($channel['channel_address']);
             $auth->channel_id = $channel['channel_id'];
             $auth->channel_hash = $channel['channel_hash'];
             $auth->channel_account_id = $channel['channel_account_id'];
             if ($channel['channel_timezone']) {
                 $auth->setTimezone($channel['channel_timezone']);
             }
         }
         $auth->observer = $ob_hash;
     }
     if ($_GET['davguest']) {
         $_SESSION['davguest'] = true;
     }
     $_SERVER['QUERY_STRING'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['QUERY_STRING']);
     $_SERVER['QUERY_STRING'] = strip_zids($_SERVER['QUERY_STRING']);
     $_SERVER['QUERY_STRING'] = preg_replace('/[\\?&]davguest=(.*?)([\\?&]|$)/ism', '', $_SERVER['QUERY_STRING']);
     $_SERVER['REQUEST_URI'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['REQUEST_URI']);
     $_SERVER['REQUEST_URI'] = strip_zids($_SERVER['REQUEST_URI']);
     $_SERVER['REQUEST_URI'] = preg_replace('/[\\?&]davguest=(.*?)([\\?&]|$)/ism', '', $_SERVER['REQUEST_URI']);
     $rootDirectory = new \Zotlabs\Storage\Directory('/', $auth);
     // A SabreDAV server-object
     $server = new SDAV\Server($rootDirectory);
     // prevent overwriting changes each other with a lock backend
     $lockBackend = new SDAV\Locks\Backend\File('store/[data]/locks');
     $lockPlugin = new SDAV\Locks\Plugin($lockBackend);
     $server->addPlugin($lockPlugin);
     $is_readable = false;
     // provide a directory view for the cloud in Hubzilla
     $browser = new \Zotlabs\Storage\Browser($auth);
     $auth->setBrowserPlugin($browser);
     $server->addPlugin($browser);
     // Experimental QuotaPlugin
     //	require_once('\Zotlabs\Storage/QuotaPlugin.php');
     //	$server->addPlugin(new \Zotlabs\Storage\\QuotaPlugin($auth));
     ob_start();
     // All we need to do now, is to fire up the server
     $server->exec();
     ob_end_flush();
     killme();
 }

 function init()
 {
     logger('oep: ' . print_r($_REQUEST, true), LOGGER_DEBUG, LOG_INFO);
     $html = argc() > 1 && argv(1) === 'html' ? true : false;
     if ($_REQUEST['url']) {
         $_REQUEST['url'] = strip_zids($_REQUEST['url']);
         $url = $_REQUEST['url'];
     }
     if (!$url) {
         http_status_exit(404, 'Not found');
     }
     $maxwidth = $_REQUEST['maxwidth'];
     $maxheight = $_REQUEST['maxheight'];
     $format = $_REQUEST['format'];
     if ($format && $format !== 'json') {
         http_status_exit(501, 'Not implemented');
     }
     if (fnmatch('*/photos/*/album/*', $url)) {
         $arr = $this->oep_album_reply($_REQUEST);
     } elseif (fnmatch('*/photos/*/image/*', $url)) {
         $arr = $this->oep_photo_reply($_REQUEST);
     } elseif (fnmatch('*/photos*', $url)) {
         $arr = $this->oep_phototop_reply($_REQUEST);
     } elseif (fnmatch('*/display/*', $url)) {
         $arr = $this->oep_display_reply($_REQUEST);
     } elseif (fnmatch('*/channel/*mid=*', $url)) {
         $arr = $this->oep_mid_reply($_REQUEST);
     } elseif (fnmatch('*/channel*', $url)) {
         $arr = $this->oep_profile_reply($_REQUEST);
     } elseif (fnmatch('*/profile/*', $url)) {
         $arr = $this->oep_profile_reply($_REQUEST);
     }
     if ($arr) {
         if ($html) {
             if ($arr['type'] === 'rich') {
                 header('Content-Type: text/html');
                 echo $arr['html'];
             }
         } else {
             header('Content-Type: application/json+oembed');
             echo json_encode($arr);
         }
         killme();
     }
     http_status_exit(404, 'Not found');
 }

function red_zrlify_img_callback($matches)
{
    require_once 'include/hubloc.php';
    $zrl = is_matrix_url($matches[2]);
    $t = strip_zids($matches[2]);
    if ($t !== $matches[2]) {
        $zrl = true;
        $matches[2] = $t;
    }
    if ($zrl) {
        return '[zmg' . $matches[1] . ']' . $matches[2] . '[/zmg]';
    }
    return $matches[0];
}

 * Language was set earlier, but we can over-ride it in the session.
 * We have to do it here because the session was just now opened.
 */
if (array_key_exists('system_language', $_POST)) {
    if (strlen($_POST['system_language'])) {
        $_SESSION['language'] = $_POST['system_language'];
    } else {
        unset($_SESSION['language']);
    }
}
if (x($_SESSION, 'language') && $_SESSION['language'] !== $lang) {
    $a->language = $_SESSION['language'];
    load_translation_table($a->language);
}
if (x($_GET, 'zid') && !$a->install) {
    $a->query_string = strip_zids($a->query_string);
    if (!local_channel()) {
        $_SESSION['my_address'] = $_GET['zid'];
        zid_init($a);
    }
}
if (x($_SESSION, 'authenticated') || x($_POST, 'auth-params') || $a->module === 'login') {
    require 'include/auth.php';
}
if (!x($_SESSION, 'sysmsg')) {
    $_SESSION['sysmsg'] = array();
}
if (!x($_SESSION, 'sysmsg_info')) {
    $_SESSION['sysmsg_info'] = array();
}
/*

/**
 * @brief Fires up the SabreDAV server.
 *
 * @param App &$a
 */
function cloud_init(&$a)
{
    // call ($currenttheme)_init since we're operating outside of index.php
    $theme_info_file = "view/theme/" . current_theme() . "/php/theme.php";
    if (file_exists($theme_info_file)) {
        require_once $theme_info_file;
        if (function_exists(str_replace('-', '_', current_theme()) . '_init')) {
            $func = str_replace('-', '_', current_theme()) . '_init';
            $func($a);
        }
    }
    require_once 'include/reddav.php';
    if (!is_dir('store')) {
        os_mkdir('store', STORAGE_DEFAULT_PERMISSIONS, false);
    }
    $which = null;
    if (argc() > 1) {
        $which = argv(1);
    }
    $profile = 0;
    $channel = $a->get_channel();
    $a->page['htmlhead'] .= '<link rel="alternate" type="application/atom+xml" href="' . $a->get_baseurl() . '/feed/' . $which . '" />' . "\r\n";
    if ($which) {
        profile_load($a, $which, $profile);
    }
    $auth = new RedBasicAuth();
    $ob_hash = get_observer_hash();
    if ($ob_hash) {
        if (local_user()) {
            $channel = $a->get_channel();
            $auth->setCurrentUser($channel['channel_address']);
            $auth->channel_name = $channel['channel_address'];
            $auth->channel_id = $channel['channel_id'];
            $auth->channel_hash = $channel['channel_hash'];
            $auth->channel_account_id = $channel['channel_account_id'];
            if ($channel['channel_timezone']) {
                $auth->timezone = $channel['channel_timezone'];
            }
        }
        $auth->observer = $ob_hash;
    }
    if ($_GET['davguest']) {
        $_SESSION['davguest'] = true;
    }
    $_SERVER['QUERY_STRING'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['QUERY_STRING']);
    $_SERVER['QUERY_STRING'] = strip_zids($_SERVER['QUERY_STRING']);
    $_SERVER['QUERY_STRING'] = preg_replace('/[\\?&]davguest=(.*?)([\\?&]|$)/ism', '', $_SERVER['QUERY_STRING']);
    $_SERVER['REQUEST_URI'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['REQUEST_URI']);
    $_SERVER['REQUEST_URI'] = strip_zids($_SERVER['REQUEST_URI']);
    $_SERVER['REQUEST_URI'] = preg_replace('/[\\?&]davguest=(.*?)([\\?&]|$)/ism', '', $_SERVER['REQUEST_URI']);
    $rootDirectory = new RedDirectory('/', $auth);
    // A SabreDAV server-object
    $server = new DAV\Server($rootDirectory);
    // prevent overwriting changes each other with a lock backend
    $lockBackend = new DAV\Locks\Backend\File('store/[data]/locks');
    $lockPlugin = new DAV\Locks\Plugin($lockBackend);
    $server->addPlugin($lockPlugin);
    // The next section of code allows us to bypass prompting for http-auth if a FILE is being accessed anonymously and permissions
    // allow this. This way one can create hotlinks to public media files in their cloud and anonymous viewers won't get asked to login.
    // If a DIRECTORY is accessed or there are permission issues accessing the file and we aren't previously authenticated via zot,
    // prompt for HTTP-auth. This will be the default case for mounting a DAV directory.
    // In order to avoid prompting for passwords for viewing a DIRECTORY, add the URL query parameter 'davguest=1'
    $isapublic_file = false;
    $davguest = x($_SESSION, 'davguest') ? true : false;
    if (!$auth->observer && $_SERVER['REQUEST_METHOD'] === 'GET') {
        try {
            $x = RedFileData('/' . $a->cmd, $auth);
            if ($x instanceof RedFile) {
                $isapublic_file = true;
            }
        } catch (Exception $e) {
            $isapublic_file = false;
        }
    }
    if (!$auth->observer && !$isapublic_file && !$davguest) {
        try {
            $auth->Authenticate($server, t('Red Matrix - Guests: Username: {your email address}, Password: +++'));
        } catch (Exception $e) {
            logger('mod_cloud: auth exception' . $e->getMessage());
            http_status_exit($e->getHTTPCode(), $e->getMessage());
        }
    }
    // provide a directory view for the cloud in Red Matrix
    $browser = new RedBrowser($auth);
    $auth->setBrowserPlugin($browser);
    $server->addPlugin($browser);
    // All we need to do now, is to fire up the server
    $server->exec();
    killme();
}

/**
 * @brief Fires up the SabreDAV server.
 *
 * @param App &$a
 */
function cloud_init(&$a)
{
    require_once 'include/reddav.php';
    if (!is_dir('store')) {
        os_mkdir('store', STORAGE_DEFAULT_PERMISSIONS, false);
    }
    $which = null;
    if (argc() > 1) {
        $which = argv(1);
    }
    $profile = 0;
    $a->page['htmlhead'] .= '<link rel="alternate" type="application/atom+xml" href="' . $a->get_baseurl() . '/feed/' . $which . '" />' . "\r\n";
    if ($which) {
        profile_load($a, $which, $profile);
    }
    $auth = new RedDAV\RedBasicAuth();
    $ob_hash = get_observer_hash();
    if ($ob_hash) {
        if (local_channel()) {
            $channel = $a->get_channel();
            $auth->setCurrentUser($channel['channel_address']);
            $auth->channel_id = $channel['channel_id'];
            $auth->channel_hash = $channel['channel_hash'];
            $auth->channel_account_id = $channel['channel_account_id'];
            if ($channel['channel_timezone']) {
                $auth->setTimezone($channel['channel_timezone']);
            }
        }
        $auth->observer = $ob_hash;
    }
    if ($_GET['davguest']) {
        $_SESSION['davguest'] = true;
    }
    $_SERVER['QUERY_STRING'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['QUERY_STRING']);
    $_SERVER['QUERY_STRING'] = strip_zids($_SERVER['QUERY_STRING']);
    $_SERVER['QUERY_STRING'] = preg_replace('/[\\?&]davguest=(.*?)([\\?&]|$)/ism', '', $_SERVER['QUERY_STRING']);
    $_SERVER['REQUEST_URI'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['REQUEST_URI']);
    $_SERVER['REQUEST_URI'] = strip_zids($_SERVER['REQUEST_URI']);
    $_SERVER['REQUEST_URI'] = preg_replace('/[\\?&]davguest=(.*?)([\\?&]|$)/ism', '', $_SERVER['REQUEST_URI']);
    $rootDirectory = new RedDAV\RedDirectory('/', $auth);
    // A SabreDAV server-object
    $server = new DAV\Server($rootDirectory);
    // prevent overwriting changes each other with a lock backend
    $lockBackend = new DAV\Locks\Backend\File('store/[data]/locks');
    $lockPlugin = new DAV\Locks\Plugin($lockBackend);
    $server->addPlugin($lockPlugin);
    $is_readable = false;
    if ($_SERVER['REQUEST_METHOD'] === 'GET') {
        try {
            $x = RedFileData('/' . $a->cmd, $auth);
        } catch (\Exception $e) {
            if ($e instanceof Sabre\DAV\Exception\Forbidden) {
                http_status_exit(401, 'Permission denied.');
            }
        }
    }
    require_once 'include/RedDAV/RedBrowser.php';
    // provide a directory view for the cloud in Hubzilla
    $browser = new RedDAV\RedBrowser($auth);
    $auth->setBrowserPlugin($browser);
    $server->addPlugin($browser);
    // Experimental QuotaPlugin
    //	require_once('include/RedDAV/QuotaPlugin.php');
    //	$server->addPlugin(new RedDAV\QuotaPlugin($auth));
    // All we need to do now, is to fire up the server
    $server->exec();
    killme();
}

 * Language was set earlier, but we can over-ride it in the session.
 * We have to do it here because the session was just now opened.
 */
if (array_key_exists('system_language', $_POST)) {
    if (strlen($_POST['system_language'])) {
        $_SESSION['language'] = $_POST['system_language'];
    } else {
        unset($_SESSION['language']);
    }
}
if (x($_SESSION, 'language') && $_SESSION['language'] !== $lang) {
    App::$language = $_SESSION['language'];
    load_translation_table(App::$language);
}
if (x($_GET, 'zid') && !App::$install) {
    App::$query_string = strip_zids(App::$query_string);
    if (!local_channel()) {
        $_SESSION['my_address'] = $_GET['zid'];
        zid_init($a);
    }
}
if (x($_SESSION, 'authenticated') || x($_POST, 'auth-params') || App::$module === 'login') {
    require 'include/auth.php';
}
if (!x($_SESSION, 'sysmsg')) {
    $_SESSION['sysmsg'] = array();
}
if (!x($_SESSION, 'sysmsg_info')) {
    $_SESSION['sysmsg_info'] = array();
}
/*

 public function run()
 {
     /*
      * Bootstrap the application, load configuration, load modules, load theme, etc.
      */
     require_once 'boot.php';
     sys_boot();
     \App::$language = get_best_language();
     load_translation_table(\App::$language, \App::$install);
     /**
      *
      * Important stuff we always need to do.
      *
      * The order of these may be important so use caution if you think they're all
      * intertwingled with no logical order and decide to sort it out. Some of the
      * dependencies have changed, but at least at one time in the recent past - the
      * order was critical to everything working properly
      *
      */
     if (\App::$session) {
         \App::$session->start();
     } else {
         session_start();
         register_shutdown_function('session_write_close');
     }
     /**
      * Language was set earlier, but we can over-ride it in the session.
      * We have to do it here because the session was just now opened.
      */
     if (array_key_exists('system_language', $_POST)) {
         if (strlen($_POST['system_language'])) {
             $_SESSION['language'] = $_POST['system_language'];
         } else {
             unset($_SESSION['language']);
         }
     }
     if (x($_SESSION, 'language') && $_SESSION['language'] !== $lang) {
         \App::$language = $_SESSION['language'];
         load_translation_table(\App::$language);
     }
     if (x($_GET, 'zid') && !\App::$install) {
         \App::$query_string = strip_zids(\App::$query_string);
         if (!local_channel()) {
             $_SESSION['my_address'] = $_GET['zid'];
             zid_init();
         }
     }
     if (x($_GET, 'zat') && !\App::$install) {
         \App::$query_string = strip_zats(\App::$query_string);
         if (!local_channel()) {
             zat_init();
         }
     }
     if (x($_SESSION, 'authenticated') || x($_POST, 'auth-params') || \App::$module === 'login') {
         require 'include/auth.php';
     }
     if (!x($_SESSION, 'sysmsg')) {
         $_SESSION['sysmsg'] = array();
     }
     if (!x($_SESSION, 'sysmsg_info')) {
         $_SESSION['sysmsg_info'] = array();
     }
     /*
      * check_config() is responsible for running update scripts. These automatically
      * update the DB schema whenever we push a new one out. It also checks to see if
      * any plugins have been added or removed and reacts accordingly.
      */
     if (\App::$install) {
         /* Allow an exception for the view module so that pcss will be interpreted during installation */
         if (\App::$module != 'view') {
             \App::$module = 'setup';
         }
     } else {
         check_config($a);
     }
     nav_set_selected('nothing');
     $Router = new Router($a);
     /* initialise content region */
     if (!x(\App::$page, 'content')) {
         \App::$page['content'] = '';
     }
     call_hooks('page_content_top', \App::$page['content']);
     $Router->Dispatch($a);
     // If you're just visiting, let javascript take you home
     if (x($_SESSION, 'visitor_home')) {
         $homebase = $_SESSION['visitor_home'];
     } elseif (local_channel()) {
         $homebase = z_root() . '/channel/' . \App::$channel['channel_address'];
     }
     if (isset($homebase)) {
         \App::$page['content'] .= '<script>var homebase = "' . $homebase . '";</script>';
     }
     // now that we've been through the module content, see if the page reported
     // a permission problem and if so, a 403 response would seem to be in order.
     if (is_array($_SESSION['sysmsg']) && stristr(implode("", $_SESSION['sysmsg']), t('Permission denied'))) {
         header($_SERVER['SERVER_PROTOCOL'] . ' 403 ' . t('Permission denied.'));
     }
     call_hooks('page_end', \App::$page['content']);
     construct_page($a);
     killme();
//.........这里部分代码省略.........

 function get()
 {
     logger('linkinfo: ' . print_r($_REQUEST, true));
     $text = null;
     $str_tags = '';
     $br = "\n";
     if (x($_GET, 'binurl')) {
         $url = trim(hex2bin($_GET['binurl']));
     } else {
         $url = trim($_GET['url']);
     }
     $url = strip_zids($url);
     if (substr($url, 0, 1) != '/' && substr($url, 0, 4) != 'http') {
         $url = 'http://' . $url;
     }
     if ($_GET['title']) {
         $title = strip_tags(trim($_GET['title']));
     }
     if ($_GET['description']) {
         $text = strip_tags(trim($_GET['description']));
     }
     if ($_GET['tags']) {
         $arr_tags = str_getcsv($_GET['tags']);
         if (count($arr_tags)) {
             array_walk($arr_tags, 'self::arr_add_hashes');
             $str_tags = $br . implode(' ', $arr_tags) . $br;
         }
     }
     logger('linkinfo: ' . $url);
     $result = z_fetch_url($url, false, 0, array('novalidate' => true, 'nobody' => true));
     if ($result['success']) {
         $hdrs = array();
         $h = explode("\n", $result['header']);
         foreach ($h as $l) {
             list($k, $v) = array_map("trim", explode(":", trim($l), 2));
             $hdrs[$k] = $v;
         }
         if (array_key_exists('Content-Type', $hdrs)) {
             $type = $hdrs['Content-Type'];
         }
         if ($type) {
             $zrl = is_matrix_url($url);
             if (stripos($type, 'image/') !== false) {
                 if ($zrl) {
                     echo $br . '[zmg]' . $url . '[/zmg]' . $br;
                 } else {
                     echo $br . '[img]' . $url . '[/img]' . $br;
                 }
                 killme();
             }
             if (stripos($type, 'video/') !== false) {
                 if ($zrl) {
                     echo $br . '[zvideo]' . $url . '[/zvideo]' . $br;
                 } else {
                     echo $br . '[video]' . $url . '[/video]' . $br;
                 }
                 killme();
             }
             if (stripos($type, 'audio/') !== false) {
                 if ($zrl) {
                     echo $br . '[zaudio]' . $url . '[/zaudio]' . $br;
                 } else {
                     echo $br . '[audio]' . $url . '[/audio]' . $br;
                 }
                 killme();
             }
         }
     }
     $template = $br . '#^[url=%s]%s[/url]%s' . $br;
     $arr = array('url' => $url, 'text' => '');
     call_hooks('parse_link', $arr);
     if (strlen($arr['text'])) {
         echo $arr['text'];
         killme();
     }
     $x = oembed_process($url);
     if ($x) {
         echo $x;
         killme();
     }
     if ($url && $title && $text) {
         $text = $br . '[quote]' . trim($text) . '[/quote]' . $br;
         $title = str_replace(array("\r", "\n"), array('', ''), $title);
         $result = sprintf($template, $url, $title ? $title : $url, $text) . $str_tags;
         logger('linkinfo (unparsed): returns: ' . $result);
         echo $result;
         killme();
     }
     $siteinfo = self::parseurl_getsiteinfo($url);
     // If this is a Red site, use zrl rather than url so they get zids sent to them by default
     if (x($siteinfo, 'generator') && strpos($siteinfo['generator'], \Zotlabs\Project\System::get_platform_name() . ' ') === 0) {
         $template = str_replace('url', 'zrl', $template);
     }
     if ($siteinfo["title"] == "") {
         echo sprintf($template, $url, $url, '') . $str_tags;
         killme();
     } else {
         $text = $siteinfo["text"];
         $title = $siteinfo["title"];
     }
//.........这里部分代码省略.........

/**
 * @brief Fires up the SabreDAV server.
 *
 * @param App &$a
 */
function cloud_init(&$a)
{
    require_once 'include/reddav.php';
    if (!is_dir('store')) {
        os_mkdir('store', STORAGE_DEFAULT_PERMISSIONS, false);
    }
    $which = null;
    if (argc() > 1) {
        $which = argv(1);
    }
    $profile = 0;
    $a->page['htmlhead'] .= '<link rel="alternate" type="application/atom+xml" href="' . $a->get_baseurl() . '/feed/' . $which . '" />' . "\r\n";
    if ($which) {
        profile_load($a, $which, $profile);
    }
    $auth = new RedDAV\RedBasicAuth();
    $ob_hash = get_observer_hash();
    if ($ob_hash) {
        if (local_channel()) {
            $channel = $a->get_channel();
            $auth->setCurrentUser($channel['channel_address']);
            $auth->channel_id = $channel['channel_id'];
            $auth->channel_hash = $channel['channel_hash'];
            $auth->channel_account_id = $channel['channel_account_id'];
            if ($channel['channel_timezone']) {
                $auth->setTimezone($channel['channel_timezone']);
            }
        }
        $auth->observer = $ob_hash;
    }
    if ($_GET['davguest']) {
        $_SESSION['davguest'] = true;
    }
    $_SERVER['QUERY_STRING'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['QUERY_STRING']);
    $_SERVER['QUERY_STRING'] = strip_zids($_SERVER['QUERY_STRING']);
    $_SERVER['QUERY_STRING'] = preg_replace('/[\\?&]davguest=(.*?)([\\?&]|$)/ism', '', $_SERVER['QUERY_STRING']);
    $_SERVER['REQUEST_URI'] = str_replace(array('?f=', '&f='), array('', ''), $_SERVER['REQUEST_URI']);
    $_SERVER['REQUEST_URI'] = strip_zids($_SERVER['REQUEST_URI']);
    $_SERVER['REQUEST_URI'] = preg_replace('/[\\?&]davguest=(.*?)([\\?&]|$)/ism', '', $_SERVER['REQUEST_URI']);
    $rootDirectory = new RedDAV\RedDirectory('/', $auth);
    // A SabreDAV server-object
    $server = new DAV\Server($rootDirectory);
    // prevent overwriting changes each other with a lock backend
    $lockBackend = new DAV\Locks\Backend\File('store/[data]/locks');
    $lockPlugin = new DAV\Locks\Plugin($lockBackend);
    $server->addPlugin($lockPlugin);
    /* This next bit should no longer be needed... */
    // The next section of code allows us to bypass prompting for http-auth if a
    // FILE is being accessed anonymously and permissions allow this. This way
    // one can create hotlinks to public media files in their cloud and anonymous
    // viewers won't get asked to login.
    // If a DIRECTORY is accessed or there are permission issues accessing the
    // file and we aren't previously authenticated via zot, prompt for HTTP-auth.
    // This will be the default case for mounting a DAV directory.
    // In order to avoid prompting for passwords for viewing a DIRECTORY, add
    // the URL query parameter 'davguest=1'.
    //	$isapublic_file = false;
    //	$davguest = ((x($_SESSION, 'davguest')) ? true : false);
    //	if ((! $auth->observer) && ($_SERVER['REQUEST_METHOD'] === 'GET')) {
    //		try {
    //			$x = RedFileData('/' . $a->cmd, $auth);
    //			if($x instanceof RedDAV\RedFile)
    //				$isapublic_file = true;
    //		}
    //		catch (Exception $e) {
    //			$isapublic_file = false;
    //		}
    //	}
    //	if ((! $auth->observer) && (! $isapublic_file) && (! $davguest)) {
    //		logger('mod_cloud: auth exception');
    //		http_status_exit(401, 'Permission denied.');
    //	}
    require_once 'include/RedDAV/RedBrowser.php';
    // provide a directory view for the cloud in Hubzilla
    $browser = new RedDAV\RedBrowser($auth);
    $auth->setBrowserPlugin($browser);
    $server->addPlugin($browser);
    // Experimental QuotaPlugin
    //	require_once('include/RedDAV/QuotaPlugin.php');
    //	$server->addPlugin(new RedDAV\QuotaPlugin($auth));
    // All we need to do now, is to fire up the server
    $server->exec();
    killme();
}