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decouple userExists from userExistsOnLDAP check

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allows to mark users as offline right away, avoids a gap of being not a
user and causing weird side effects

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>
This commit is contained in:
Arthur Schiwon 2019-11-29 13:21:45 +01:00 committed by Backportbot
parent dcd5b15443
commit b7a6a9d4a2
3 changed files with 57 additions and 15 deletions
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15
apps/user_ldap/lib/User/User.php
View file

@ -175,6 +175,21 @@ class User {
}
}
/**
* marks a user as deleted
*
* @throws \OCP\PreConditionNotMetException
*/
public function markUser() {
$curValue = $this->config->getUserValue($this->getUsername(), 'user_ldap', 'isDeleted', '0');
if($curValue === '1') {
// the user is already marked, do not write to DB again
return;
}
$this->config->setUserValue($this->getUsername(), 'user_ldap', 'isDeleted', '1');
$this->config->setUserValue($this->getUsername(), 'user_ldap', 'foundDeleted', (string)time());
}
/**
* processes results from LDAP for attributes as returned by getAttributesToRead()
* @param array $ldapEntry the user entry as retrieved from LDAP

20
apps/user_ldap/lib/User_LDAP.php
View file

@ -297,6 +297,12 @@ class User_LDAP extends BackendUtility implements \OCP\IUserBackend, \OCP\UserIn
if(is_null($user)) {
return false;
}
$uid = $user instanceof User ? $user->getUsername() : $user->getOCName();
$cacheKey = 'userExistsOnLDAP' . $uid;
$userExists = $this->access->connection->getFromCache($cacheKey);
if(!is_null($userExists)) {
return (bool)$userExists;
}
$dn = $user->getDN();
//check if user really still exists by reading its entry
@ -304,18 +310,22 @@ class User_LDAP extends BackendUtility implements \OCP\IUserBackend, \OCP\UserIn
try {
$uuid = $this->access->getUserMapper()->getUUIDByDN($dn);
if (!$uuid) {
$this->access->connection->writeToCache($cacheKey, false);
return false;
}
$newDn = $this->access->getUserDnByUuid($uuid);
//check if renamed user is still valid by reapplying the ldap filter
if ($newDn === $dn || !is_array($this->access->readAttribute($newDn, '', $this->access->connection->ldapUserFilter))) {
$this->access->connection->writeToCache($cacheKey, false);
return false;
}
$this->access->getUserMapper()->setDNbyUUID($newDn, $uuid);
$this->access->connection->writeToCache($cacheKey, true);
return true;
} catch (ServerNotAvailableException $e) {
throw $e;
} catch (\Exception $e) {
$this->access->connection->writeToCache($cacheKey, false);
return false;
}
}
@ -324,6 +334,7 @@ class User_LDAP extends BackendUtility implements \OCP\IUserBackend, \OCP\UserIn
$user->unmark();
}
$this->access->connection->writeToCache($cacheKey, true);
return true;
}
@ -346,15 +357,10 @@ class User_LDAP extends BackendUtility implements \OCP\IUserBackend, \OCP\UserIn
$this->access->connection->ldapHost, ILogger::DEBUG);
$this->access->connection->writeToCache('userExists'.$uid, false);
return false;
} else if($user instanceof OfflineUser) {
//express check for users marked as deleted. Returning true is
//necessary for cleanup
return true;
}
$result = $this->userExistsOnLDAP($user);
$this->access->connection->writeToCache('userExists'.$uid, $result);
return $result;
$this->access->connection->writeToCache('userExists'.$uid, true);
return true;
}
/**

37
apps/user_ldap/lib/User_Proxy.php
View file

@ -37,7 +37,8 @@ use OCP\IUserSession;
use OCP\Notification\IManager as INotificationManager;
class User_Proxy extends Proxy implements \OCP\IUserBackend, \OCP\UserInterface, IUserLDAP {
private $backends = array();
private $backends = [];
/** @var User_LDAP */
private $refBackend = null;
/**
@ -49,9 +50,14 @@ class User_Proxy extends Proxy implements \OCP\IUserBackend, \OCP\UserInterface,
* @param INotificationManager $notificationManager
* @param IUserSession $userSession
*/
public function __construct(array $serverConfigPrefixes, ILDAPWrapper $ldap, IConfig $ocConfig,
INotificationManager $notificationManager, IUserSession $userSession,
UserPluginManager $userPluginManager) {
public function __construct(
array $serverConfigPrefixes,
ILDAPWrapper $ldap,
IConfig $ocConfig,
INotificationManager $notificationManager,
IUserSession $userSession,
UserPluginManager $userPluginManager
) {
parent::__construct($ldap);
foreach($serverConfigPrefixes as $configPrefix) {
$this->backends[$configPrefix] =
@ -105,13 +111,13 @@ class User_Proxy extends Proxy implements \OCP\IUserBackend, \OCP\UserInterface,
&& method_exists($this->getAccess($prefix), $method)) {
$instance = $this->getAccess($prefix);
}
$result = call_user_func_array(array($instance, $method), $parameters);
$result = call_user_func_array([$instance, $method], $parameters);
if($result === $passOnWhen) {
//not found here, reset cache to null if user vanished
//because sometimes methods return false with a reason
$userExists = call_user_func_array(
array($this->backends[$prefix], 'userExists'),
array($uid)
[$this->backends[$prefix], 'userExistsOnLDAP'],
[$uid]
);
if(!$userExists) {
$this->writeToCache($cacheKey, null);
@ -170,7 +176,22 @@ class User_Proxy extends Proxy implements \OCP\IUserBackend, \OCP\UserInterface,
* @return boolean
*/
public function userExists($uid) {
return $this->handleRequest($uid, 'userExists', array($uid));
$existsOnLDAP = false;
$existsLocally = $this->handleRequest($uid, 'userExists', array($uid));
if($existsLocally) {
$existsOnLDAP = $this->userExistsOnLDAP($uid);
}
if($existsLocally && !$existsOnLDAP) {
try {
$user = $this->getLDAPAccess($uid)->userManager->get($uid);
if($user instanceof User) {
$user->markUser();
}
} catch (\Exception $e) {
// ignore
}
}
return $existsLocally;
}
/**