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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Bjoern Schiessle <bjoern@schiessle.org>
* @author Björn Schießle <bjoern@schiessle.org>
* @author Lukas Reschke <lukas@statuscode.ch>
*
* @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\FederatedFileSharing;
use OCP\AppFramework\Http;
use OCP\BackgroundJob\IJobList;
use OCP\Http\Client\IClientService;
use OCP\OCS\IDiscoveryService;
class Notifications {
const RESPONSE_FORMAT = 'json'; // default response format for ocs calls
/** @var AddressHandler */
private $addressHandler;
/** @var IClientService */
private $httpClientService;
/** @var IDiscoveryService */
private $discoveryService;
/** @var IJobList */
private $jobList;
/**
* @param AddressHandler $addressHandler
* @param IClientService $httpClientService
* @param IDiscoveryService $discoveryService
* @param IJobList $jobList
*/
public function __construct(
AddressHandler $addressHandler,
IClientService $httpClientService,
IDiscoveryService $discoveryService,
IJobList $jobList
) {
$this->addressHandler = $addressHandler;
$this->httpClientService = $httpClientService;
$this->discoveryService = $discoveryService;
$this->jobList = $jobList;
}
/**
* send server-to-server share to remote server
*
* @param string $token
* @param string $shareWith
* @param string $name
* @param int $remote_id
* @param string $owner
* @param string $ownerFederatedId
* @param string $sharedBy
* @param string $sharedByFederatedId
* @return bool
* @throws \OC\HintException
* @throws \OC\ServerNotAvailableException
*/
public function sendRemoteShare($token, $shareWith, $name, $remote_id, $owner, $ownerFederatedId, $sharedBy, $sharedByFederatedId) {
list($user, $remote) = $this->addressHandler->splitUserRemote($shareWith);
if ($user && $remote) {
$local = $this->addressHandler->generateRemoteURL();
$fields = array(
'shareWith' => $user,
'token' => $token,
'name' => $name,
'remoteId' => $remote_id,
'owner' => $owner,
'ownerFederatedId' => $ownerFederatedId,
'sharedBy' => $sharedBy,
'sharedByFederatedId' => $sharedByFederatedId,
'remote' => $local,
);
$result = $this->tryHttpPostToShareEndpoint($remote, '', $fields);
$status = json_decode($result['result'], true);
if ($result['success'] && ($status['ocs']['meta']['statuscode'] === 100 || $status['ocs']['meta']['statuscode'] === 200)) {
\OC_Hook::emit('OCP\Share', 'federated_share_added', ['server' => $remote]);
return true;
}
}
return false;
}
/**
* ask owner to re-share the file with the given user
*
* @param string $token
* @param int $id remote Id
* @param int $shareId internal share Id
* @param string $remote remote address of the owner
* @param string $shareWith
* @param int $permission
* @return bool
* @throws \OC\HintException
* @throws \OC\ServerNotAvailableException
*/
public function requestReShare($token, $id, $shareId, $remote, $shareWith, $permission) {
$fields = array(
'shareWith' => $shareWith,
'token' => $token,
'permission' => $permission,
'remoteId' => $shareId
);
$result = $this->tryHttpPostToShareEndpoint(rtrim($remote, '/'), '/' . $id . '/reshare', $fields);
$status = json_decode($result['result'], true);
$httpRequestSuccessful = $result['success'];
$ocsCallSuccessful = $status['ocs']['meta']['statuscode'] === 100 || $status['ocs']['meta']['statuscode'] === 200;
$validToken = isset($status['ocs']['data']['token']) && is_string($status['ocs']['data']['token']);
$validRemoteId = isset($status['ocs']['data']['remoteId']);
if ($httpRequestSuccessful && $ocsCallSuccessful && $validToken && $validRemoteId) {
return [
$status['ocs']['data']['token'],
(int)$status['ocs']['data']['remoteId']
];
}
return false;
}
/**
* send server-to-server unshare to remote server
*
* @param string $remote url
* @param int $id share id
* @param string $token
* @return bool
*/
public function sendRemoteUnShare($remote, $id, $token) {
$this->sendUpdateToRemote($remote, $id, $token, 'unshare');
}
/**
* send server-to-server unshare to remote server
*
* @param string $remote url
* @param int $id share id
* @param string $token
* @return bool
*/
public function sendRevokeShare($remote, $id, $token) {
$this->sendUpdateToRemote($remote, $id, $token, 'revoke');
}
/**
* send notification to remote server if the permissions was changed
*
* @param string $remote
* @param int $remoteId
* @param string $token
* @param int $permissions
* @return bool
*/
public function sendPermissionChange($remote, $remoteId, $token, $permissions) {
$this->sendUpdateToRemote($remote, $remoteId, $token, 'permissions', ['permissions' => $permissions]);
}
/**
* forward accept reShare to remote server
*
* @param string $remote
* @param int $remoteId
* @param string $token
*/
public function sendAcceptShare($remote, $remoteId, $token) {
$this->sendUpdateToRemote($remote, $remoteId, $token, 'accept');
}
/**
* forward decline reShare to remote server
*
* @param string $remote
* @param int $remoteId
* @param string $token
*/
public function sendDeclineShare($remote, $remoteId, $token) {
$this->sendUpdateToRemote($remote, $remoteId, $token, 'decline');
}
/**
* inform remote server whether server-to-server share was accepted/declined
*
* @param string $remote
* @param string $token
* @param int $remoteId Share id on the remote host
* @param string $action possible actions: accept, decline, unshare, revoke, permissions
* @param array $data
* @param int $try
* @return boolean
*/
public function sendUpdateToRemote($remote, $remoteId, $token, $action, $data = [], $try = 0) {
$fields = array('token' => $token);
foreach ($data as $key => $value) {
$fields[$key] = $value;
}
$result = $this->tryHttpPostToShareEndpoint(rtrim($remote, '/'), '/' . $remoteId . '/' . $action, $fields);
$status = json_decode($result['result'], true);
if ($result['success'] &&
($status['ocs']['meta']['statuscode'] === 100 ||
$status['ocs']['meta']['statuscode'] === 200
)
) {
return true;
} elseif ($try === 0) {
// only add new job on first try
$this->jobList->add('OCA\FederatedFileSharing\BackgroundJob\RetryJob',
[
'remote' => $remote,
'remoteId' => $remoteId,
'token' => $token,
'action' => $action,
'data' => json_encode($data),
'try' => $try,
'lastRun' => $this->getTimestamp()
]
);
}
return false;
}
/**
* return current timestamp
*
* @return int
*/
protected function getTimestamp() {
return time();
}
/**
* try http post with the given protocol, if no protocol is given we pick
* the secure one (https)
*
* @param string $remoteDomain
* @param string $urlSuffix
* @param array $fields post parameters
* @return array
* @throws \Exception
*/
protected function tryHttpPostToShareEndpoint($remoteDomain, $urlSuffix, array $fields) {
$client = $this->httpClientService->newClient();
if ($this->addressHandler->urlContainProtocol($remoteDomain) === false) {
$remoteDomain = 'https://' . $remoteDomain;
}
$result = [
'success' => false,
'result' => '',
];
$federationEndpoints = $this->discoveryService->discover($remoteDomain, 'FEDERATED_SHARING');
$endpoint = isset($federationEndpoints['share']) ? $federationEndpoints['share'] : '/ocs/v2.php/cloud/shares';
try {
$response = $client->post($remoteDomain . $endpoint . $urlSuffix . '?format=' . self::RESPONSE_FORMAT, [
'body' => $fields,
'timeout' => 10,
'connect_timeout' => 10,
]);
$result['result'] = $response->getBody();
$result['success'] = true;
} catch (\Exception $e) {
// if flat re-sharing is not supported by the remote server
// we re-throw the exception and fall back to the old behaviour.
// (flat re-shares has been introduced in Nextcloud 9.1)
if ($e->getCode() === Http::STATUS_INTERNAL_SERVER_ERROR) {
throw $e;
}
}
return $result;
}
}