/**
* Determine if $session_id represents a valid session and if so start the session
*
*/
public static function start($session_id, $sessions = false)
{
global $langmessage, $dataDir, $wbMessageBuffer;
static $locked_message = false;
//get the session file
if (!$sessions) {
$sessions = self::GetSessionIds();
if (!isset($sessions[$session_id])) {
self::cookie(gp_session_cookie);
//make sure the cookie is deleted
msg($langmessage['Session Expired'] . ' (timeout)');
return false;
}
}
$sess_info = $sessions[$session_id];
//check ~ip, ~user agent ...
if (gp_browser_auth && !empty($sess_info['uid'])) {
$auth_uid = self::auth_browseruid();
$auth_uid_legacy = self::auth_browseruid(true);
//legacy option added to prevent logging users out, added 2.0b2
if ($sess_info['uid'] != $auth_uid && $sess_info['uid'] != $auth_uid_legacy) {
self::cookie(gp_session_cookie);
//make sure the cookie is deleted
msg($langmessage['Session Expired'] . ' (browser auth)');
return false;
}
}
$session_file = $dataDir . '/data/_sessions/' . $sess_info['file_name'];
if ($session_file === false || !\gp\tool\Files::Exists($session_file)) {
self::cookie(gp_session_cookie);
//make sure the cookie is deleted
msg($langmessage['Session Expired'] . ' (invalid)');
return false;
}
//prevent browser caching when editing
Header('Last-Modified: ' . gmdate('D, j M Y H:i:s') . ' GMT');
Header('Expires: ' . gmdate('D, j M Y H:i:s', time()) . ' GMT');
Header('Cache-Control: no-store, no-cache, must-revalidate');
// HTTP/1.1
Header('Cache-Control: post-check=0, pre-check=0', false);
Header('Pragma: no-cache');
// HTTP/1.0
$GLOBALS['gpAdmin'] = self::SessionData($session_file, $checksum);
//lock to prevent conflicting edits
if (gp_lock_time > 0 && (!empty($GLOBALS['gpAdmin']['editing']) || !empty($GLOBALS['gpAdmin']['granted']))) {
$expires = gp_lock_time;
if (!\gp\tool\Files::Lock('admin', sha1(sha1($session_id)), $expires)) {
msg($langmessage['site_locked'] . ' ' . sprintf($langmessage['lock_expires_in'], ceil($expires / 60)));
$locked_message = true;
$GLOBALS['gpAdmin']['locked'] = true;
} else {
unset($GLOBALS['gpAdmin']['locked']);
}
}
//extend cookie?
if (isset($GLOBALS['gpAdmin']['remember'])) {
$elapsed = time() - $GLOBALS['gpAdmin']['remember'];
if ($elapsed > 604800) {
//7 days
$GLOBALS['gpAdmin']['remember'] = time();
self::cookie(gp_session_cookie, $session_id);
}
}
register_shutdown_function(array('\\gp\\tool\\Session', 'close'), $session_file, $checksum);
self::SaveSetting();
//make sure forms have admin nonce
ob_start(array('\\gp\\tool\\Session', 'AdminBuffer'));
\gp\tool\Output::$lang_values += array('cancel' => 'ca', 'update' => 'up', 'caption' => 'cp', 'Width' => 'Width', 'Height' => 'Height', 'save' => 'Save', 'Saved' => 'Saved', 'Saving' => 'Saving', 'Close' => 'Close', 'Page' => 'Page', 'theme_content' => 'Extra', 'Publish Draft' => 'Draft', 'Publish' => 'Publish');
\gp\tool::LoadComponents('sortable,autocomplete,gp-admin,gp-admin-css');
\gp\admin\Tools::VersionsAndCheckTime();
\gp\tool\Output::$inline_vars += array('gpRem' => \gp\admin\Tools::CanRemoteInstall());
//prepend messages from message buffer
if (isset($GLOBALS['gpAdmin']['message_buffer']) && count($GLOBALS['gpAdmin']['message_buffer'])) {
$wbMessageBuffer = array_merge($GLOBALS['gpAdmin']['message_buffer'], $wbMessageBuffer);
unset($GLOBALS['gpAdmin']['message_buffer']);
}
//alias
if (isset($_COOKIE['gp_alias'])) {
$GLOBALS['gpAdmin']['useralias'] = $_COOKIE['gp_alias'];
} else {
$GLOBALS['gpAdmin']['useralias'] = $GLOBALS['gpAdmin']['username'];
}
return true;
}
