egroupware_official/calendar/freebusy.php
2021-04-13 18:15:25 +02:00

141 lines
4.6 KiB
PHP

<?php
/**
* EGroupware - simple / non-CalDAV freebusy URL eg. exported as FBURL in vCard of users
*
* Usage:
* - https://egw.example.org/egroupware/calendar/freebusy.php?user=%NAME%
* - https://egw.example.org/egroupware/calendar/freebusy.php?email=%NAME%@%SERVER%
* Authentication is required unless explicitly switched off in calendar preferences of the requested user:
* + EGroupware "sessionid" cookie
* + basic auth credentials of an EGroupware user
* + "password" GET parameter with a configured password from the requested user's preferences
* + "cred" GET parameter with base64 encoded "<username>:<password>" of an EGroupware user
*
* @link http://www.egroupware.org
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package calendar
* @subpackage export
*/
use EGroupware\Api;
$GLOBALS['egw_info'] = array(
'flags' => array(
'currentapp' => 'calendar',
'noheader' => True,
'nofooter' => True,
),
);
// check if we are already logged in
require_once __DIR__.'/../api/src/autoload.php';
if (!($logged_in = !empty(Api\Session::get_sessionid())))
{
// support basic auth for regular user-credentials
if (!empty($_SERVER['PHP_AUTH_PW']) || !empty($_SERVER['REDIRECT_HTTP_AUTHORIZATION']))
{
$GLOBALS['egw_info']['flags']['autocreate_session_callback'] = Api\Header\Authenticate::class.'::autocreate_session_callback';
$logged_in = true; // header sends 401, if not authenticated
}
else
{
$GLOBALS['egw_info']['flags']['currentapp'] = 'login';
$GLOBALS['egw_info']['flags']['noapi'] = True;
}
}
include ('../header.inc.php');
function fail_exit($msg)
{
echo "<html>\n<head>\n<title>$msg</title>\n<meta http-equiv=\"content-type\" content=\"text/html; charset=".
Api\Translation::charset()."\" />\n</head>\n<body><h1>$msg</h1>\n</body>\n</html>\n";
http_response_code(401);
exit;
}
if (!$logged_in)
{
include ('../api/src/loader.php');
$GLOBALS['egw_info']['flags']['currentapp'] = 'calendar';
}
// fix for SOGo connector, which does not decode the = in our f/b url
if (strpos($_SERVER['QUERY_STRING'],'=3D') !== false && substr($_GET['user'],0,2) == '3D')
{
foreach(['user', 'email', 'password', 'cred'] as $name)
{
if (isset($_GET[$name])) $_GET[$name] = substr($_GET[$name],2);
}
}
if (isset($_GET['user']) && !is_numeric($user = $_GET['user']))
{
// check if user contains the current domain --> remove it
list(, $domain) = explode('@', $user);
if ($domain === $GLOBALS['egw_info']['user']['domain'])
{
list($user) = explode('@', $user);
}
$user = $GLOBALS['egw']->accounts->name2id($user, 'account_lid', 'u');
}
elseif (isset($_GET['email']))
{
$user = $GLOBALS['egw']->accounts->name2id($_GET['email'], 'account_email', 'u');
}
if ($user === false || !($username = $GLOBALS['egw']->accounts->id2name($user)))
{
fail_exit(lang("freebusy: unknown user '%1', wrong password or not available to not logged in users !!!"." $username($user)",$_GET['user']));
}
if (!$logged_in)
{
if (empty($_GET['cred']))
{
$GLOBALS['egw_info']['user']['account_id'] = $user;
$GLOBALS['egw_info']['user']['account_lid'] = $username;
$GLOBALS['egw']->preferences->account_id = $user;
$GLOBALS['egw_info']['user']['preferences'] = $GLOBALS['egw']->preferences->read_repository();
$cal_prefs = &$GLOBALS['egw_info']['user']['preferences']['calendar'];
$logged_in = !empty($cal_prefs['freebusy']) &&
(empty($cal_prefs['freebusy_pw']) || $cal_prefs['freebusy_pw'] == $_GET['password']);
}
else
{
$credentials = base64_decode($_GET['cred']);
list($authuser, $password) = explode(':', $credentials, 2);
if (strpos($authuser, '@') === false)
{
$domain = $GLOBALS['egw_info']['server']['default_domain'];
$authuser .= '@' . $domain;
}
else
{
list(, $domain) = explode('@',$authuser, 2);
}
if (array_key_exists($domain, $GLOBALS['egw_domain']))
{
$_POST['login'] = $authuser;
$_REQUEST['domain'] = $domain;
$GLOBALS['egw_info']['server']['default_domain'] = $domain;
$GLOBALS['egw_info']['user']['domain'] = $domain;
$GLOBALS['egw_info']['flags']['currentapp'] = 'login';
$GLOBALS['egw_info']['flags']['noapi'] = false;
$logged_in = $GLOBALS['egw']->session->create($authuser, $password, 'text');
session_unset();
session_destroy();
}
}
if (!$logged_in)
{
fail_exit(lang("freebusy: unknown user '%1', or not available for unauthenticated users!", $_GET['user']));
}
}
if ($_GET['debug'])
{
echo "<pre>";
}
else
{
Api\Header\Content::type('freebusy.ifb','text/calendar');
}
$ical = new calendar_ical();
echo $ical->freebusy($user, $_GET['end']);