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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author André Gaul <gaul@web-yard.de>
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Christian Berendt <berendt@b1-systems.de>
* @author Christopher T. Johnson <ctjctj@gmail.com>
* @author Johan Björk <johanimon@gmail.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Martin Mattel <martin.mattel@diemattels.at>
* @author Michael Gapczynski <GapczynskiM@gmail.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Philipp Kapfer <philipp.kapfer@gmx.at>
* @author Robin Appelman <robin@icewind.nl>
* @author Robin McCorkell <robin@mccorkell.me.uk>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @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\Files_External\Lib\Storage;
use Aws\Result;
use Aws\S3\S3Client;
use Aws\S3\Exception\S3Exception;
use Icewind\Streams\CallbackWrapper;
use Icewind\Streams\IteratorDirectory;
use OC\Cache\CappedMemoryCache;
use OC\Files\ObjectStore\S3ConnectionTrait;
use OC\Files\ObjectStore\S3ObjectTrait;
use OCP\Constants;
class AmazonS3 extends \OC\Files\Storage\Common {
use S3ConnectionTrait;
use S3ObjectTrait;
public function needsPartFile() {
return false;
}
/**
* @var int in seconds
*/
private $rescanDelay = 10;
/** @var CappedMemoryCache|Result[] */
private $objectCache;
public function __construct($parameters) {
parent::__construct($parameters);
$this->parseParams($parameters);
$this->objectCache = new CappedMemoryCache();
}
/**
* @param string $path
* @return string correctly encoded path
*/
private function normalizePath($path) {
$path = trim($path, '/');
if (!$path) {
$path = '.';
}
return $path;
}
private function isRoot($path) {
return $path === '.';
}
private function cleanKey($path) {
if ($this->isRoot($path)) {
return '/';
}
return $path;
}
private function clearCache() {
$this->objectCache = new CappedMemoryCache();
}
private function invalidateCache($key) {
unset($this->objectCache[$key]);
$keys = array_keys($this->objectCache->getData());
$keyLength = strlen($key);
foreach ($keys as $existingKey) {
if (substr($existingKey, 0, $keyLength) === $key) {
unset($this->objectCache[$existingKey]);
}
}
}
/**
* @param $key
* @return Result|boolean
*/
private function headObject($key) {
if (!isset($this->objectCache[$key])) {
try {
$this->objectCache[$key] = $this->getConnection()->headObject(array(
'Bucket' => $this->bucket,
'Key' => $key
));
} catch (S3Exception $e) {
if ($e->getStatusCode() >= 500) {
throw $e;
}
$this->objectCache[$key] = false;
}
}
return $this->objectCache[$key];
}
/**
* Updates old storage ids (v0.2.1 and older) that are based on key and secret to new ones based on the bucket name.
* TODO Do this in an update.php. requires iterating over all users and loading the mount.json from their home
*
* @param array $params
*/
public function updateLegacyId(array $params) {
$oldId = 'amazon::' . $params['key'] . md5($params['secret']);
// find by old id or bucket
$stmt = \OC::$server->getDatabaseConnection()->prepare(
'SELECT `numeric_id`, `id` FROM `*PREFIX*storages` WHERE `id` IN (?, ?)'
);
$stmt->execute(array($oldId, $this->id));
while ($row = $stmt->fetch()) {
$storages[$row['id']] = $row['numeric_id'];
}
if (isset($storages[$this->id]) && isset($storages[$oldId])) {
// if both ids exist, delete the old storage and corresponding filecache entries
\OC\Files\Cache\Storage::remove($oldId);
} else if (isset($storages[$oldId])) {
// if only the old id exists do an update
$stmt = \OC::$server->getDatabaseConnection()->prepare(
'UPDATE `*PREFIX*storages` SET `id` = ? WHERE `id` = ?'
);
$stmt->execute(array($this->id, $oldId));
}
// only the bucket based id may exist, do nothing
}
/**
* Remove a file or folder
*
* @param string $path
* @return bool
*/
protected function remove($path) {
// remember fileType to reduce http calls
$fileType = $this->filetype($path);
if ($fileType === 'dir') {
return $this->rmdir($path);
} else if ($fileType === 'file') {
return $this->unlink($path);
} else {
return false;
}
}
public function mkdir($path) {
$path = $this->normalizePath($path);
if ($this->is_dir($path)) {
return false;
}
try {
$this->getConnection()->putObject(array(
'Bucket' => $this->bucket,
'Key' => $path . '/',
'Body' => '',
'ContentType' => 'httpd/unix-directory'
));
$this->testTimeout();
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
$this->invalidateCache($path);
return true;
}
public function file_exists($path) {
return $this->filetype($path) !== false;
}
public function rmdir($path) {
$path = $this->normalizePath($path);
if ($this->isRoot($path)) {
return $this->clearBucket();
}
if (!$this->file_exists($path)) {
return false;
}
$this->invalidateCache($path);
return $this->batchDelete($path);
}
protected function clearBucket() {
$this->clearCache();
try {
$this->getConnection()->clearBucket($this->bucket);
return true;
// clearBucket() is not working with Ceph, so if it fails we try the slower approach
} catch (\Exception $e) {
return $this->batchDelete();
}
return false;
}
private function batchDelete($path = null) {
$params = array(
'Bucket' => $this->bucket
);
if ($path !== null) {
$params['Prefix'] = $path . '/';
}
try {
$connection = $this->getConnection();
// Since there are no real directories on S3, we need
// to delete all objects prefixed with the path.
do {
// instead of the iterator, manually loop over the list ...
$objects = $connection->listObjects($params);
// ... so we can delete the files in batches
if (isset($objects['Contents'])) {
$connection->deleteObjects([
'Bucket' => $this->bucket,
'Delete' => [
'Objects' => $objects['Contents']
]
]);
$this->testTimeout();
}
// we reached the end when the list is no longer truncated
} while ($objects['IsTruncated']);
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
return true;
}
public function opendir($path) {
$path = $this->normalizePath($path);
if ($this->isRoot($path)) {
$path = '';
} else {
$path .= '/';
}
try {
$files = array();
$results = $this->getConnection()->getPaginator('ListObjects', [
'Bucket' => $this->bucket,
'Delimiter' => '/',
'Prefix' => $path,
]);
foreach ($results as $result) {
// sub folders
if (is_array($result['CommonPrefixes'])) {
foreach ($result['CommonPrefixes'] as $prefix) {
$files[] = substr(trim($prefix['Prefix'], '/'), strlen($path));
}
}
if (is_array($result['Contents'])) {
foreach ($result['Contents'] as $object) {
if (isset($object['Key']) && $object['Key'] === $path) {
// it's the directory itself, skip
continue;
}
$file = basename(
isset($object['Key']) ? $object['Key'] : $object['Prefix']
);
$files[] = $file;
}
}
}
return IteratorDirectory::wrap($files);
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
}
public function stat($path) {
$path = $this->normalizePath($path);
try {
$stat = array();
if ($this->is_dir($path)) {
//folders don't really exist
$stat['size'] = -1; //unknown
$stat['mtime'] = time() - $this->rescanDelay * 1000;
} else {
$result = $this->headObject($path);
$stat['size'] = $result['ContentLength'] ? $result['ContentLength'] : 0;
if (isset($result['Metadata']['lastmodified'])) {
$stat['mtime'] = strtotime($result['Metadata']['lastmodified']);
} else {
$stat['mtime'] = strtotime($result['LastModified']);
}
}
$stat['atime'] = time();
return $stat;
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
}
public function is_dir($path) {
$path = $this->normalizePath($path);
try {
return $this->isRoot($path) || $this->headObject($path . '/');
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
}
public function filetype($path) {
$path = $this->normalizePath($path);
if ($this->isRoot($path)) {
return 'dir';
}
try {
if ($this->headObject($path)) {
return 'file';
}
if ($this->headObject($path . '/')) {
return 'dir';
}
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
return false;
}
public function getPermissions($path) {
$type = $this->filetype($path);
if (!$type) {
return 0;
}
return $type === 'dir' ? Constants::PERMISSION_ALL : Constants::PERMISSION_ALL - Constants::PERMISSION_CREATE;
}
public function unlink($path) {
$path = $this->normalizePath($path);
if ($this->is_dir($path)) {
return $this->rmdir($path);
}
try {
$this->deleteObject($path);
$this->invalidateCache($path);
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
return true;
}
public function fopen($path, $mode) {
$path = $this->normalizePath($path);
switch ($mode) {
case 'r':
case 'rb':
try {
return $this->readObject($path);
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
case 'w':
case 'wb':
$tmpFile = \OCP\Files::tmpFile();
$handle = fopen($tmpFile, 'w');
return CallbackWrapper::wrap($handle, null, null, function () use ($path, $tmpFile) {
$this->writeBack($tmpFile, $path);
});
case 'a':
case 'ab':
case 'r+':
case 'w+':
case 'wb+':
case 'a+':
case 'x':
case 'x+':
case 'c':
case 'c+':
if (strrpos($path, '.') !== false) {
$ext = substr($path, strrpos($path, '.'));
} else {
$ext = '';
}
$tmpFile = \OCP\Files::tmpFile($ext);
if ($this->file_exists($path)) {
$source = $this->readObject($path);
file_put_contents($tmpFile, $source);
}
$handle = fopen($tmpFile, $mode);
return CallbackWrapper::wrap($handle, null, null, function () use ($path, $tmpFile) {
$this->writeBack($tmpFile, $path);
});
}
return false;
}
public function touch($path, $mtime = null) {
$path = $this->normalizePath($path);
$metadata = array();
if (is_null($mtime)) {
$mtime = time();
}
$metadata = [
'lastmodified' => gmdate(\DateTime::RFC1123, $mtime)
];
$fileType = $this->filetype($path);
try {
if ($fileType !== false) {
if ($fileType === 'dir' && !$this->isRoot($path)) {
$path .= '/';
}
$this->getConnection()->copyObject([
'Bucket' => $this->bucket,
'Key' => $this->cleanKey($path),
'Metadata' => $metadata,
'CopySource' => $this->bucket . '/' . $path,
'MetadataDirective' => 'REPLACE',
]);
$this->testTimeout();
} else {
$mimeType = \OC::$server->getMimeTypeDetector()->detectPath($path);
$this->getConnection()->putObject([
'Bucket' => $this->bucket,
'Key' => $this->cleanKey($path),
'Metadata' => $metadata,
'Body' => '',
'ContentType' => $mimeType,
'MetadataDirective' => 'REPLACE',
]);
$this->testTimeout();
}
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
$this->invalidateCache($path);
return true;
}
public function copy($path1, $path2) {
$path1 = $this->normalizePath($path1);
$path2 = $this->normalizePath($path2);
if ($this->is_file($path1)) {
try {
$this->getConnection()->copyObject(array(
'Bucket' => $this->bucket,
'Key' => $this->cleanKey($path2),
'CopySource' => S3Client::encodeKey($this->bucket . '/' . $path1)
));
$this->testTimeout();
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
} else {
$this->remove($path2);
try {
$this->getConnection()->copyObject(array(
'Bucket' => $this->bucket,
'Key' => $path2 . '/',
'CopySource' => S3Client::encodeKey($this->bucket . '/' . $path1 . '/')
));
$this->testTimeout();
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
$dh = $this->opendir($path1);
if (is_resource($dh)) {
while (($file = readdir($dh)) !== false) {
if (\OC\Files\Filesystem::isIgnoredDir($file)) {
continue;
}
$source = $path1 . '/' . $file;
$target = $path2 . '/' . $file;
$this->copy($source, $target);
}
}
}
$this->invalidateCache($path2);
return true;
}
public function rename($path1, $path2) {
$path1 = $this->normalizePath($path1);
$path2 = $this->normalizePath($path2);
if ($this->is_file($path1)) {
if ($this->copy($path1, $path2) === false) {
return false;
}
if ($this->unlink($path1) === false) {
$this->unlink($path2);
return false;
}
} else {
if ($this->copy($path1, $path2) === false) {
return false;
}
if ($this->rmdir($path1) === false) {
$this->rmdir($path2);
return false;
}
}
return true;
}
public function test() {
$this->getConnection()->headBucket([
'Bucket' => $this->bucket
]);
return true;
}
public function getId() {
return $this->id;
}
public function writeBack($tmpFile, $path) {
try {
$source = fopen($tmpFile, 'r');
$this->writeObject($path, $source);
$this->invalidateCache($path);
fclose($source);
unlink($tmpFile);
return true;
} catch (S3Exception $e) {
\OCP\Util::logException('files_external', $e);
return false;
}
}
/**
* check if curl is installed
*/
public static function checkDependencies() {
return true;
}
}