391 lines
11 KiB
PHP
391 lines
11 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Bjoern Schiessle <bjoern@schiessle.org>
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* @author Björn Schießle <bjoern@schiessle.org>
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* @author Lukas Reschke <lukas@statuscode.ch>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OCA\FederatedFileSharing;
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use OCP\AppFramework\Http;
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use OCP\BackgroundJob\IJobList;
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use OCP\Federation\ICloudFederationFactory;
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use OCP\Federation\ICloudFederationProviderManager;
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use OCP\Http\Client\IClientService;
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use OCP\OCS\IDiscoveryService;
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class Notifications {
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const RESPONSE_FORMAT = 'json'; // default response format for ocs calls
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/** @var AddressHandler */
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private $addressHandler;
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/** @var IClientService */
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private $httpClientService;
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/** @var IDiscoveryService */
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private $discoveryService;
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/** @var IJobList */
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private $jobList;
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/** @var ICloudFederationProviderManager */
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private $federationProviderManager;
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/** @var ICloudFederationFactory */
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private $cloudFederationFactory;
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/**
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* @param AddressHandler $addressHandler
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* @param IClientService $httpClientService
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* @param IDiscoveryService $discoveryService
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* @param IJobList $jobList
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* @param ICloudFederationProviderManager $federationProviderManager
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* @param ICloudFederationFactory $cloudFederationFactory
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*/
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public function __construct(
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AddressHandler $addressHandler,
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IClientService $httpClientService,
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IDiscoveryService $discoveryService,
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IJobList $jobList,
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ICloudFederationProviderManager $federationProviderManager,
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ICloudFederationFactory $cloudFederationFactory
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) {
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$this->addressHandler = $addressHandler;
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$this->httpClientService = $httpClientService;
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$this->discoveryService = $discoveryService;
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$this->jobList = $jobList;
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$this->federationProviderManager = $federationProviderManager;
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$this->cloudFederationFactory = $cloudFederationFactory;
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}
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/**
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* send server-to-server share to remote server
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*
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* @param string $token
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* @param string $shareWith
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* @param string $name
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* @param int $remote_id
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* @param string $owner
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* @param string $ownerFederatedId
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* @param string $sharedBy
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* @param string $sharedByFederatedId
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* @return bool
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* @throws \OC\HintException
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* @throws \OC\ServerNotAvailableException
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*/
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public function sendRemoteShare($token, $shareWith, $name, $remote_id, $owner, $ownerFederatedId, $sharedBy, $sharedByFederatedId) {
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list($user, $remote) = $this->addressHandler->splitUserRemote($shareWith);
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if ($user && $remote) {
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$local = $this->addressHandler->generateRemoteURL();
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$fields = array(
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'shareWith' => $user,
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'token' => $token,
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'name' => $name,
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'remoteId' => $remote_id,
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'owner' => $owner,
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'ownerFederatedId' => $ownerFederatedId,
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'sharedBy' => $sharedBy,
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'sharedByFederatedId' => $sharedByFederatedId,
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'remote' => $local,
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);
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$result = $this->tryHttpPostToShareEndpoint($remote, '', $fields);
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$status = json_decode($result['result'], true);
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$ocsStatus = isset($status['ocs']);
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$ocsSuccess = $ocsStatus && ($status['ocs']['meta']['statuscode'] === 100 || $status['ocs']['meta']['statuscode'] === 200);
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if ($result['success'] && (!$ocsStatus ||$ocsSuccess)) {
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\OC_Hook::emit('OCP\Share', 'federated_share_added', ['server' => $remote]);
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return true;
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}
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}
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return false;
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}
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/**
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* ask owner to re-share the file with the given user
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*
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* @param string $token
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* @param int $id remote Id
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* @param int $shareId internal share Id
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* @param string $remote remote address of the owner
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* @param string $shareWith
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* @param int $permission
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* @return bool
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* @throws \OC\HintException
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* @throws \OC\ServerNotAvailableException
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*/
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public function requestReShare($token, $id, $shareId, $remote, $shareWith, $permission) {
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$fields = array(
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'shareWith' => $shareWith,
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'token' => $token,
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'permission' => $permission,
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'remoteId' => $shareId
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);
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$result = $this->tryHttpPostToShareEndpoint(rtrim($remote, '/'), '/' . $id . '/reshare', $fields);
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$status = json_decode($result['result'], true);
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$httpRequestSuccessful = $result['success'];
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$ocsCallSuccessful = $status['ocs']['meta']['statuscode'] === 100 || $status['ocs']['meta']['statuscode'] === 200;
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$validToken = isset($status['ocs']['data']['token']) && is_string($status['ocs']['data']['token']);
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$validRemoteId = isset($status['ocs']['data']['remoteId']);
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if ($httpRequestSuccessful && $ocsCallSuccessful && $validToken && $validRemoteId) {
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return [
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$status['ocs']['data']['token'],
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(int)$status['ocs']['data']['remoteId']
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];
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}
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return false;
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}
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/**
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* send server-to-server unshare to remote server
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*
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* @param string $remote url
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* @param int $id share id
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* @param string $token
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* @return bool
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*/
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public function sendRemoteUnShare($remote, $id, $token) {
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$this->sendUpdateToRemote($remote, $id, $token, 'unshare');
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}
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/**
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* send server-to-server unshare to remote server
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*
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* @param string $remote url
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* @param int $id share id
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* @param string $token
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* @return bool
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*/
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public function sendRevokeShare($remote, $id, $token) {
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$this->sendUpdateToRemote($remote, $id, $token, 'revoke');
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}
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/**
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* send notification to remote server if the permissions was changed
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*
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* @param string $remote
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* @param int $remoteId
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* @param string $token
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* @param int $permissions
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* @return bool
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*/
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public function sendPermissionChange($remote, $remoteId, $token, $permissions) {
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$this->sendUpdateToRemote($remote, $remoteId, $token, 'permissions', ['permissions' => $permissions]);
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}
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/**
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* forward accept reShare to remote server
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*
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* @param string $remote
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* @param int $remoteId
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* @param string $token
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*/
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public function sendAcceptShare($remote, $remoteId, $token) {
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$this->sendUpdateToRemote($remote, $remoteId, $token, 'accept');
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}
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/**
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* forward decline reShare to remote server
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*
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* @param string $remote
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* @param int $remoteId
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* @param string $token
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*/
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public function sendDeclineShare($remote, $remoteId, $token) {
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$this->sendUpdateToRemote($remote, $remoteId, $token, 'decline');
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}
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/**
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* inform remote server whether server-to-server share was accepted/declined
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*
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* @param string $remote
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* @param string $token
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* @param int $remoteId Share id on the remote host
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* @param string $action possible actions: accept, decline, unshare, revoke, permissions
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* @param array $data
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* @param int $try
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* @return boolean
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*/
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public function sendUpdateToRemote($remote, $remoteId, $token, $action, $data = [], $try = 0) {
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$fields = array('token' => $token);
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foreach ($data as $key => $value) {
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$fields[$key] = $value;
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}
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$result = $this->tryHttpPostToShareEndpoint(rtrim($remote, '/'), '/' . $remoteId . '/' . $action, $fields);
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$status = json_decode($result['result'], true);
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if ($result['success'] &&
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($status['ocs']['meta']['statuscode'] === 100 ||
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$status['ocs']['meta']['statuscode'] === 200
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)
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) {
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return true;
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} elseif ($try === 0) {
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// only add new job on first try
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$this->jobList->add('OCA\FederatedFileSharing\BackgroundJob\RetryJob',
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[
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'remote' => $remote,
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'remoteId' => $remoteId,
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'token' => $token,
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'action' => $action,
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'data' => json_encode($data),
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'try' => $try,
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'lastRun' => $this->getTimestamp()
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]
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);
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}
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return false;
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}
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/**
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* return current timestamp
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*
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* @return int
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*/
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protected function getTimestamp() {
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return time();
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}
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/**
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* try http post with the given protocol, if no protocol is given we pick
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* the secure one (https)
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*
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* @param string $remoteDomain
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* @param string $urlSuffix
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* @param array $fields post parameters
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* @param string $action define the action (possible values: share, reshare, accept, decline, unshare, revoke, permissions)
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* @return array
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* @throws \Exception
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*/
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protected function tryHttpPostToShareEndpoint($remoteDomain, $urlSuffix, array $fields, $action="share") {
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if ($this->addressHandler->urlContainProtocol($remoteDomain) === false) {
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$remoteDomain = 'https://' . $remoteDomain;
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}
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$result = [
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'success' => false,
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'result' => '',
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];
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// if possible we use the new OCM API
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$ocmResult = $this->tryOCMEndPoint($remoteDomain, $fields, $action);
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if ($ocmResult) {
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$result['success'] = true;
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return $result;
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}
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// Fall back to old API
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$client = $this->httpClientService->newClient();
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$federationEndpoints = $this->discoveryService->discover($remoteDomain, 'FEDERATED_SHARING');
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$endpoint = isset($federationEndpoints['share']) ? $federationEndpoints['share'] : '/ocs/v2.php/cloud/shares';
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try {
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$response = $client->post($remoteDomain . $endpoint . $urlSuffix . '?format=' . self::RESPONSE_FORMAT, [
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'body' => $fields,
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'timeout' => 10,
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'connect_timeout' => 10,
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]);
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$result['result'] = $response->getBody();
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$result['success'] = true;
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} catch (\Exception $e) {
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// if flat re-sharing is not supported by the remote server
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// we re-throw the exception and fall back to the old behaviour.
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// (flat re-shares has been introduced in Nextcloud 9.1)
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if ($e->getCode() === Http::STATUS_INTERNAL_SERVER_ERROR) {
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throw $e;
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}
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}
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return $result;
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}
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/**
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* check if server supports the new OCM api and ask for the correct end-point
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*
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* @param string $url
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* @return string
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*/
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protected function getOCMEndPoint($url) {
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$client = $this->httpClientService->newClient();
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try {
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$response = $client->get($url, ['timeout' => 10, 'connect_timeout' => 10]);
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} catch (\Exception $e) {
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return '';
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}
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$result = $response->getBody();
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$result = json_decode($result, true);
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if (isset($result['end-point'])) {
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return $result['end-point'];
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}
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return '';
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}
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/**
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* send action regarding federated sharing to the remote server using the OCM API
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*
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* @param $remoteDomain
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* @param $fields
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* @param $action
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*
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* @return bool
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*/
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protected function tryOCMEndPoint($remoteDomain, $fields, $action) {
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switch ($action) {
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case 'share':
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$share = $this->cloudFederationFactory->getCloudFederationShare(
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$fields['shareWith'] . '@' . $remoteDomain,
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$fields['name'],
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'',
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$fields['remoteId'],
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$fields['ownerFederatedId'],
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$fields['owner'],
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$fields['sharedByFederatedId'],
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$fields['sharedBy'],
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['name' => 'webdav', 'options' => ['access_token' => $fields['token'], 'permissions' => ['read', 'write', 'share']]],
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'user',
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'file'
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);
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return $this->federationProviderManager->sendShare($share);
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}
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}
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}
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