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<?php
/**
* ownCloud
*
* @author Michael Gapczynski
* @copyright 2012 Michael Gapczynski mtgap@owncloud.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*/
namespace OC\Files\Storage;
require_once 'aws-sdk/sdk.class.php';
class AmazonS3 extends \OC\Files\Storage\Common {
private $s3;
private $bucket;
private $objects = array();
private $id;
private static $tempFiles = array();
// TODO options: storage class, encryption server side, encrypt before upload?
public function __construct($params) {
$this->id = 'amazon::'.$params['key'] . md5($params['secret']);
$this->s3 = new \AmazonS3(array('key' => $params['key'], 'secret' => $params['secret']));
$this->bucket = $params['bucket'];
}
private function getObject($path) {
if (array_key_exists($path, $this->objects)) {
return $this->objects[$path];
} else {
$response = $this->s3->get_object_metadata($this->bucket, $path);
if ($response) {
$this->objects[$path] = $response;
return $response;
// This object could be a folder, a '/' must be at the end of the path
} else if (substr($path, -1) != '/') {
$response = $this->s3->get_object_metadata($this->bucket, $path.'/');
if ($response) {
$this->objects[$path] = $response;
return $response;
}
}
}
return false;
}
public function getId(){
return $this->id;
}
public function mkdir($path) {
// Folders in Amazon S3 are 0 byte objects with a '/' at the end of the name
if (substr($path, -1) != '/') {
$path .= '/';
}
$response = $this->s3->create_object($this->bucket, $path, array('body' => ''));
return $response->isOK();
}
public function rmdir($path) {
if (substr($path, -1) != '/') {
$path .= '/';
}
return $this->unlink($path);
}
public function opendir($path) {
if ($path == '' || $path == '/') {
// Use the '/' delimiter to only fetch objects inside the folder
$opt = array('delimiter' => '/');
} else {
if (substr($path, -1) != '/') {
$path .= '/';
}
$opt = array('delimiter' => '/', 'prefix' => $path);
}
$response = $this->s3->list_objects($this->bucket, $opt);
if ($response->isOK()) {
$files = array();
foreach ($response->body->Contents as $object) {
// The folder being opened also shows up in the list of objects, don't add it to the files
if ($object->Key != $path) {
$files[] = basename($object->Key);
}
}
// Sub folders show up as CommonPrefixes
foreach ($response->body->CommonPrefixes as $object) {
$files[] = basename($object->Prefix);
}
\OC_FakeDirStream::$dirs['amazons3'.$path] = $files;
return opendir('fakedir://amazons3'.$path);
}
return false;
}
public function stat($path) {
if ($path == '' || $path == '/') {
$stat['size'] = $this->s3->get_bucket_filesize($this->bucket);
$stat['atime'] = time();
$stat['mtime'] = $stat['atime'];
} else if ($object = $this->getObject($path)) {
$stat['size'] = $object['Size'];
$stat['atime'] = time();
$stat['mtime'] = strtotime($object['LastModified']);
}
if (isset($stat)) {
return $stat;
}
return false;
}
public function filetype($path) {
if ($path == '' || $path == '/') {
return 'dir';
} else if ($object = $this->getObject($path)) {
// Amazon S3 doesn't have typical folders, this is an alternative method to detect a folder
if (substr($object['Key'], -1) == '/' && $object['Size'] == 0) {
return 'dir';
} else {
return 'file';
}
}
return false;
}
public function isReadable($path) {
// TODO Check acl and determine who grantee is
return true;
}
public function isUpdatable($path) {
// TODO Check acl and determine who grantee is
return true;
}
public function file_exists($path) {
if ($this->filetype($path) == 'dir' && substr($path, -1) != '/') {
$path .= '/';
}
return $this->s3->if_object_exists($this->bucket, $path);
}
public function unlink($path) {
$response = $this->s3->delete_object($this->bucket, $path);
return $response->isOK();
}
public function fopen($path, $mode) {
switch ($mode) {
case 'r':
case 'rb':
$tmpFile = \OC_Helper::tmpFile();
$handle = fopen($tmpFile, 'w');
$response = $this->s3->get_object($this->bucket, $path, array('fileDownload' => $handle));
if ($response->isOK()) {
return fopen($tmpFile, 'r');
}
break;
case 'w':
case 'wb':
case 'a':
case 'ab':
case 'r+':
case 'w+':
case 'wb+':
case 'a+':
case 'x':
case 'x+':
case 'c':
case 'c+':
if (strrpos($path, '.') !== false) {
$ext = substr($path, strrpos($path, '.'));
} else {
$ext = '';
}
$tmpFile = \OC_Helper::tmpFile($ext);
\OC_CloseStreamWrapper::$callBacks[$tmpFile] = array($this, 'writeBack');
if ($this->file_exists($path)) {
$source = $this->fopen($path, 'r');
file_put_contents($tmpFile, $source);
}
self::$tempFiles[$tmpFile] = $path;
return fopen('close://'.$tmpFile, $mode);
}
return false;
}
public function writeBack($tmpFile) {
if (isset(self::$tempFiles[$tmpFile])) {
$handle = fopen($tmpFile, 'r');
$response = $this->s3->create_object($this->bucket, self::$tempFiles[$tmpFile], array('fileUpload' => $handle));
if ($response->isOK()) {
unlink($tmpFile);
}
}
}
public function getMimeType($path) {
if ($this->filetype($path) == 'dir') {
return 'httpd/unix-directory';
} else if ($object = $this->getObject($path)) {
return $object['ContentType'];
}
return false;
}
public function free_space($path) {
// Infinite?
return false;
}
public function touch($path, $mtime = null) {
if (is_null($mtime)) {
$mtime = time();
}
if ($this->filetype($path) == 'dir' && substr($path, -1) != '/') {
$path .= '/';
}
$response = $this->s3->update_object($this->bucket, $path, array('meta' => array('LastModified' => $mtime)));
return $response->isOK();
}
}
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