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do not try to search after the last page 

- saves an LDAP requests in these cases
- prevents a Protocol Error logged on < 7.3 API (for backports)

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>
This commit is contained in:
Arthur Schiwon 2021-04-27 12:52:26 +02:00 committed by backportbot[bot]
parent f369fdaf94
commit 46ae746379
4 changed files with 49 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
apps/user_ldap/composer/composer/autoload_classmap.php
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@ -28,6 +28,7 @@ return array(
'OCA\\User_LDAP\\Events\\UserBackendRegistered' => $baseDir . '/../lib/Events/UserBackendRegistered.php',
'OCA\\User_LDAP\\Exceptions\\AttributeNotSet' => $baseDir . '/../lib/Exceptions/AttributeNotSet.php',
'OCA\\User_LDAP\\Exceptions\\ConstraintViolationException' => $baseDir . '/../lib/Exceptions/ConstraintViolationException.php',
'OCA\\User_LDAP\\Exceptions\\NoMoreResults' => $baseDir . '/../lib/Exceptions/NoMoreResults.php',
'OCA\\User_LDAP\\Exceptions\\NotOnLDAP' => $baseDir . '/../lib/Exceptions/NotOnLDAP.php',
'OCA\\User_LDAP\\FilesystemHelper' => $baseDir . '/../lib/FilesystemHelper.php',
'OCA\\User_LDAP\\GroupPluginManager' => $baseDir . '/../lib/GroupPluginManager.php',

1
apps/user_ldap/composer/composer/autoload_static.php
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@ -43,6 +43,7 @@ class ComposerStaticInitUser_LDAP
'OCA\\User_LDAP\\Events\\UserBackendRegistered' => __DIR__ . '/..' . '/../lib/Events/UserBackendRegistered.php',
'OCA\\User_LDAP\\Exceptions\\AttributeNotSet' => __DIR__ . '/..' . '/../lib/Exceptions/AttributeNotSet.php',
'OCA\\User_LDAP\\Exceptions\\ConstraintViolationException' => __DIR__ . '/..' . '/../lib/Exceptions/ConstraintViolationException.php',
'OCA\\User_LDAP\\Exceptions\\NoMoreResults' => __DIR__ . '/..' . '/../lib/Exceptions/NoMoreResults.php',
'OCA\\User_LDAP\\Exceptions\\NotOnLDAP' => __DIR__ . '/..' . '/../lib/Exceptions/NotOnLDAP.php',
'OCA\\User_LDAP\\FilesystemHelper' => __DIR__ . '/..' . '/../lib/FilesystemHelper.php',
'OCA\\User_LDAP\\GroupPluginManager' => __DIR__ . '/..' . '/../lib/GroupPluginManager.php',

20
apps/user_ldap/lib/Access.php
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@ -51,6 +51,7 @@ use OC\HintException;
use OC\Hooks\PublicEmitter;
use OC\ServerNotAvailableException;
use OCA\User_LDAP\Exceptions\ConstraintViolationException;
use OCA\User_LDAP\Exceptions\NoMoreResults;
use OCA\User_LDAP\Mapping\AbstractMapping;
use OCA\User_LDAP\User\Manager;
use OCA\User_LDAP\User\OfflineUser;
@ -267,7 +268,14 @@ class Access extends LDAPUtility {
* @throws ServerNotAvailableException
*/
public function executeRead($cr, $dn, $attribute, $filter, $maxResults) {
$this->initPagedSearch($filter, $dn, [$attribute], $maxResults, 0);
try {
$this->initPagedSearch($filter, $dn, [$attribute], $maxResults, 0);
} catch (NoMoreResults $e) {
// does not happen, no pagination here since offset is 0, but the
// previous call is needed for a potential reset of the state.
// Tools would still point out a possible NoMoreResults exception.
return false;
}
$dn = $this->helper->DNasBaseParameter($dn);
$rr = @$this->invokeLDAPMethod('read', $cr, $dn, $filter, [$attribute]);
if (!$this->ldap->isResource($rr)) {
@ -1146,7 +1154,12 @@ class Access extends LDAPUtility {
}
//check whether paged search should be attempted
$pagedSearchOK = $this->initPagedSearch($filter, $base, $attr, (int)$limit, (int)$offset);
try {
$pagedSearchOK = $this->initPagedSearch($filter, $base, $attr, (int)$limit, (int)$offset);
} catch (NoMoreResults $e) {
// beyond last results page
return false;
}
$sr = $this->invokeLDAPMethod('search', $cr, $base, $filter, $attr);
// cannot use $cr anymore, might have changed in the previous call!
@ -1999,6 +2012,7 @@ class Access extends LDAPUtility {
* @param int $offset
* @return bool|true
* @throws ServerNotAvailableException
* @throws NoMoreResults
*/
private function initPagedSearch(
string $filter,
@ -2030,7 +2044,7 @@ class Access extends LDAPUtility {
if (!$this->hasMoreResults()) {
// when the cookie is reset with != 0 offset, there are no further
// results, so stop.
return false;
throw new NoMoreResults();
}
}
if ($this->lastCookie !== '' && $offset === 0) {

30
apps/user_ldap/lib/Exceptions/NoMoreResults.php Normal file
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@ -0,0 +1,30 @@
<?php
declare(strict_types=1);
/**
* @copyright Copyright (c) 2021 Arthur Schiwon <blizzz@arthur-schiwon.de>
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
namespace OCA\User_LDAP\Exceptions;
class NoMoreResults extends \Exception {
}