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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
*
* @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 OC\Files\Storage\Wrapper;
use OCP\Files\Storage\IStorage;
/**
* Availability checker for storages
*
* Throws a StorageNotAvailableException for storages with known failures
*/
class Availability extends Wrapper {
const RECHECK_TTL_SEC = 600; // 10 minutes
public static function shouldRecheck($availability) {
if (!$availability['available']) {
// trigger a recheck if TTL reached
if ((time() - $availability['last_checked']) > self::RECHECK_TTL_SEC) {
return true;
}
}
return false;
}
/**
* Only called if availability === false
*
* @return bool
*/
private function updateAvailability() {
// reset availability to false so that multiple requests don't recheck concurrently
$this->setAvailability(false);
try {
$result = $this->test();
} catch (\Exception $e) {
$result = false;
}
$this->setAvailability($result);
return $result;
}
/**
* @return bool
*/
private function isAvailable() {
$availability = $this->getAvailability();
if (self::shouldRecheck($availability)) {
return $this->updateAvailability();
}
return $availability['available'];
}
/**
* @throws \OCP\Files\StorageNotAvailableException
*/
private function checkAvailability() {
if (!$this->isAvailable()) {
throw new \OCP\Files\StorageNotAvailableException();
}
}
/** {@inheritdoc} */
public function mkdir($path) {
$this->checkAvailability();
try {
return parent::mkdir($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function rmdir($path) {
$this->checkAvailability();
try {
return parent::rmdir($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function opendir($path) {
$this->checkAvailability();
try {
return parent::opendir($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function is_dir($path) {
$this->checkAvailability();
try {
return parent::is_dir($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function is_file($path) {
$this->checkAvailability();
try {
return parent::is_file($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function stat($path) {
$this->checkAvailability();
try {
return parent::stat($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function filetype($path) {
$this->checkAvailability();
try {
return parent::filetype($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function filesize($path) {
$this->checkAvailability();
try {
return parent::filesize($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function isCreatable($path) {
$this->checkAvailability();
try {
return parent::isCreatable($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function isReadable($path) {
$this->checkAvailability();
try {
return parent::isReadable($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function isUpdatable($path) {
$this->checkAvailability();
try {
return parent::isUpdatable($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function isDeletable($path) {
$this->checkAvailability();
try {
return parent::isDeletable($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function isSharable($path) {
$this->checkAvailability();
try {
return parent::isSharable($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function getPermissions($path) {
$this->checkAvailability();
try {
return parent::getPermissions($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function file_exists($path) {
if ($path === '') {
return true;
}
$this->checkAvailability();
try {
return parent::file_exists($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function filemtime($path) {
$this->checkAvailability();
try {
return parent::filemtime($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function file_get_contents($path) {
$this->checkAvailability();
try {
return parent::file_get_contents($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function file_put_contents($path, $data) {
$this->checkAvailability();
try {
return parent::file_put_contents($path, $data);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function unlink($path) {
$this->checkAvailability();
try {
return parent::unlink($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function rename($path1, $path2) {
$this->checkAvailability();
try {
return parent::rename($path1, $path2);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function copy($path1, $path2) {
$this->checkAvailability();
try {
return parent::copy($path1, $path2);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function fopen($path, $mode) {
$this->checkAvailability();
try {
return parent::fopen($path, $mode);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function getMimeType($path) {
$this->checkAvailability();
try {
return parent::getMimeType($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function hash($type, $path, $raw = false) {
$this->checkAvailability();
try {
return parent::hash($type, $path, $raw);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function free_space($path) {
$this->checkAvailability();
try {
return parent::free_space($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function search($query) {
$this->checkAvailability();
try {
return parent::search($query);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function touch($path, $mtime = null) {
$this->checkAvailability();
try {
return parent::touch($path, $mtime);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function getLocalFile($path) {
$this->checkAvailability();
try {
return parent::getLocalFile($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function hasUpdated($path, $time) {
$this->checkAvailability();
try {
return parent::hasUpdated($path, $time);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function getOwner($path) {
try {
return parent::getOwner($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function getETag($path) {
$this->checkAvailability();
try {
return parent::getETag($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function getDirectDownload($path) {
$this->checkAvailability();
try {
return parent::getDirectDownload($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function copyFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath) {
$this->checkAvailability();
try {
return parent::copyFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function moveFromStorage(IStorage $sourceStorage, $sourceInternalPath, $targetInternalPath) {
$this->checkAvailability();
try {
return parent::moveFromStorage($sourceStorage, $sourceInternalPath, $targetInternalPath);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
/** {@inheritdoc} */
public function getMetaData($path) {
$this->checkAvailability();
try {
return parent::getMetaData($path);
} catch (\OCP\Files\StorageNotAvailableException $e) {
$this->setAvailability(false);
throw $e;
}
}
}