[testing] Allow to lock a file without the lock being killed at the end of the request (#22823)

* Allow to lock a file without the lock being killed at the end of the request

* Make DB locking detectable

3 files changed, 311 insertions, 0 deletions

diff --git a/apps/testing/appinfo/routes.php b/apps/testing/appinfo/routes.php
index 6684d486360..619daf40da9 100644
--- a/apps/testing/appinfo/routes.php
+++ b/apps/testing/appinfo/routes.php
@@ -22,6 +22,7 @@
 namespace OCA\Testing\AppInfo;
 
 use OCA\Testing\Config;
+use OCA\Testing\Locking\Provisioning;
 use OCP\API;
 
 $config = new Config(
@@ -44,3 +45,17 @@ API::register(
 	'testing',
 	API::ADMIN_AUTH
 );
+
+$locking = new Provisioning(
+	\OC::$server->getLockingProvider(),
+	\OC::$server->getDatabaseConnection(),
+	\OC::$server->getConfig(),
+	\OC::$server->getRequest()
+);
+API::register('get', '/apps/testing/api/v1/lockprovisioning', [$locking, 'isLockingEnabled'], 'files_lockprovisioning', API::ADMIN_AUTH);
+API::register('get', '/apps/testing/api/v1/lockprovisioning/{type}/{user}', [$locking, 'isLocked'], 'files_lockprovisioning', API::ADMIN_AUTH);
+API::register('post', '/apps/testing/api/v1/lockprovisioning/{type}/{user}', [$locking, 'acquireLock'], 'files_lockprovisioning', API::ADMIN_AUTH);
+API::register('put', '/apps/testing/api/v1/lockprovisioning/{type}/{user}', [$locking, 'changeLock'], 'files_lockprovisioning', API::ADMIN_AUTH);
+API::register('delete', '/apps/testing/api/v1/lockprovisioning/{type}/{user}', [$locking, 'releaseLock'], 'files_lockprovisioning', API::ADMIN_AUTH);
+API::register('delete', '/apps/testing/api/v1/lockprovisioning/{type}', [$locking, 'releaseAll'], 'files_lockprovisioning', API::ADMIN_AUTH);
+API::register('delete', '/apps/testing/api/v1/lockprovisioning', [$locking, 'releaseAll'], 'files_lockprovisioning', API::ADMIN_AUTH);
diff --git a/apps/testing/locking/fakedblockingprovider.php b/apps/testing/locking/fakedblockingprovider.php
new file mode 100644
index 00000000000..fd090e0e075
--- /dev/null
+++ b/apps/testing/locking/fakedblockingprovider.php
@@ -0,0 +1,69 @@
+<?php
+/**
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\Testing\Locking;
+
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\IDBConnection;
+use OCP\ILogger;
+
+class FakeDBLockingProvider extends \OC\Lock\DBLockingProvider {
+	// Lock for 10 hours just to be sure
+	const TTL = 36000;
+
+	/**
+	 * Need a new child, because parent::connection is private instead of protected...
+	 * @var IDBConnection
+	 */
+	protected $db;
+
+	/**
+	 * @param \OCP\IDBConnection $connection
+	 * @param \OCP\ILogger $logger
+	 * @param \OCP\AppFramework\Utility\ITimeFactory $timeFactory
+	 */
+	public function __construct(IDBConnection $connection, ILogger $logger, ITimeFactory $timeFactory) {
+		parent::__construct($connection, $logger, $timeFactory);
+		$this->db = $connection;
+	}
+
+
+	/**
+	 * @param string $path
+	 * @param int $type self::LOCK_SHARED or self::LOCK_EXCLUSIVE
+	 */
+	public function releaseLock($path, $type) {
+		// we DONT keep shared locks till the end of the request
+		if ($type === self::LOCK_SHARED) {
+			$this->db->executeUpdate(
+				'UPDATE `*PREFIX*file_locks` SET `lock` = 0 WHERE `key` = ? AND `lock` = 1',
+				[$path]
+			);
+		}
+
+		parent::releaseLock($path, $type);
+	}
+
+	public function __destruct() {
+		// Prevent cleaning up at the end of the live time.
+		// parent::__destruct();
+	}
+}
diff --git a/apps/testing/locking/provisioning.php b/apps/testing/locking/provisioning.php
new file mode 100644
index 00000000000..55a1be0caee
--- /dev/null
+++ b/apps/testing/locking/provisioning.php
@@ -0,0 +1,227 @@
+<?php
+/**
+ * @author Joas Schilling <nickvergessen@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OCA\Testing\Locking;
+
+use OC\Lock\DBLockingProvider;
+use OC\Lock\MemcacheLockingProvider;
+use OC\User\NoUserException;
+use OCP\AppFramework\Http;
+use OCP\Files\NotFoundException;
+use OCP\IConfig;
+use OCP\IDBConnection;
+use OCP\IRequest;
+use OCP\Lock\ILockingProvider;
+use OCP\Lock\LockedException;
+
+class Provisioning {
+
+	/** @var ILockingProvider */
+	protected $lockingProvider;
+
+	/** @var IDBConnection */
+	protected $connection;
+
+	/** @var IConfig */
+	protected $config;
+
+	/** @var IRequest */
+	protected $request;
+
+	/**
+	 * @param ILockingProvider $lockingProvider
+	 * @param IDBConnection $connection
+	 * @param IConfig $config
+	 * @param IRequest $request
+	 */
+	public function __construct(ILockingProvider $lockingProvider, IDBConnection $connection, IConfig $config, IRequest $request) {
+		$this->lockingProvider = $lockingProvider;
+		$this->connection = $connection;
+		$this->config = $config;
+		$this->request = $request;
+	}
+
+	/**
+	 * @return ILockingProvider
+	 */
+	protected function getLockingProvider() {
+		if ($this->lockingProvider instanceof DBLockingProvider) {
+			return \OC::$server->query('OCA\Testing\Locking\FakeDBLockingProvider');
+		} else {
+			throw new \RuntimeException('Lock provisioning is only possible using the DBLockingProvider');
+		}
+	}
+
+	/**
+	 * @param array $parameters
+	 * @return int
+	 */
+	protected function getType($parameters) {
+		return isset($parameters['type']) ? (int) $parameters['type'] : 0;
+	}
+
+	/**
+	 * @param array $parameters
+	 * @return int
+	 */
+	protected function getPath($parameters) {
+		$node = \OC::$server->getRootFolder()
+			->getUserFolder($parameters['user'])
+			->get($this->request->getParam('path'));
+		return 'files/' . md5($node->getStorage()->getId() . '::' . trim($node->getInternalPath(), '/'));
+	}
+
+	/**
+	 * @return \OC_OCS_Result
+	 */
+	public function isLockingEnabled() {
+		try {
+			$this->getLockingProvider();
+			return new \OC_OCS_Result(null, 100);
+		} catch (\RuntimeException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_NOT_IMPLEMENTED, $e->getMessage());
+		}
+	}
+
+	/**
+	 * @param array $parameters
+	 * @return \OC_OCS_Result
+	 */
+	public function acquireLock(array $parameters) {
+		try {
+			$path = $this->getPath($parameters);
+		} catch (NoUserException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_NOT_FOUND, 'User not found');
+		} catch (NotFoundException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_NOT_FOUND, 'Path not found');
+		}
+		$type = $this->getType($parameters);
+
+		$lockingProvider = $this->getLockingProvider();
+
+		try {
+			$lockingProvider->acquireLock($path, $type);
+			$this->config->setAppValue('testing', 'locking_' . $path, $type);
+			return new \OC_OCS_Result(null, 100);
+		} catch (LockedException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_LOCKED);
+		}
+	}
+
+	/**
+	 * @param array $parameters
+	 * @return \OC_OCS_Result
+	 */
+	public function changeLock(array $parameters) {
+		try {
+			$path = $this->getPath($parameters);
+		} catch (NoUserException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_NOT_FOUND, 'User not found');
+		} catch (NotFoundException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_NOT_FOUND, 'Path not found');
+		}
+		$type = $this->getType($parameters);
+
+		$lockingProvider = $this->getLockingProvider();
+
+		try {
+			$lockingProvider->changeLock($path, $type);
+			$this->config->setAppValue('testing', 'locking_' . $path, $type);
+			return new \OC_OCS_Result(null, 100);
+		} catch (LockedException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_LOCKED);
+		}
+	}
+
+	/**
+	 * @param array $parameters
+	 * @return \OC_OCS_Result
+	 */
+	public function releaseLock(array $parameters) {
+		try {
+			$path = $this->getPath($parameters);
+		} catch (NoUserException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_NOT_FOUND, 'User not found');
+		} catch (NotFoundException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_NOT_FOUND, 'Path not found');
+		}
+		$type = $this->getType($parameters);
+
+		$lockingProvider = $this->getLockingProvider();
+
+		try {
+			$lockingProvider->releaseLock($path, $type);
+			$this->config->deleteAppValue('testing', 'locking_' . $path);
+			return new \OC_OCS_Result(null, 100);
+		} catch (LockedException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_LOCKED);
+		}
+	}
+
+	/**
+	 * @param array $parameters
+	 * @return \OC_OCS_Result
+	 */
+	public function isLocked(array $parameters) {
+		try {
+			$path = $this->getPath($parameters);
+		} catch (NoUserException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_NOT_FOUND, 'User not found');
+		} catch (NotFoundException $e) {
+			return new \OC_OCS_Result(null, Http::STATUS_NOT_FOUND, 'Path not found');
+		}
+		$type = $this->getType($parameters);
+
+		$lockingProvider = $this->getLockingProvider();
+
+		if ($lockingProvider->isLocked($path, $type)) {
+			return new \OC_OCS_Result(null, 100);
+		}
+
+		return new \OC_OCS_Result(null, Http::STATUS_LOCKED);
+	}
+
+	/**
+	 * @param array $parameters
+	 * @return \OC_OCS_Result
+	 */
+	public function releaseAll(array $parameters) {
+		$type = $this->getType($parameters);
+
+		$lockingProvider = $this->getLockingProvider();
+
+		foreach ($this->config->getAppKeys('testing') as $lock) {
+			if (strpos($lock, 'locking_') === 0) {
+				$path = substr($lock, strlen('locking_'));
+
+				if ($type === ILockingProvider::LOCK_EXCLUSIVE && $this->config->getAppValue('testing', $lock) == ILockingProvider::LOCK_EXCLUSIVE) {
+					$lockingProvider->releaseLock($path, $this->config->getAppValue('testing', $lock));
+				} else if ($type === ILockingProvider::LOCK_SHARED && $this->config->getAppValue('testing', $lock) == ILockingProvider::LOCK_SHARED) {
+					$lockingProvider->releaseLock($path, $this->config->getAppValue('testing', $lock));
+				} else {
+					$lockingProvider->releaseLock($path, $this->config->getAppValue('testing', $lock));
+				}
+			}
+		}
+
+		return new \OC_OCS_Result(null, 100);
+	}
+}