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<?php
/**
* @copyright Copyright (c) 2017 Robin Appelman <robin@icewind.nl>
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
namespace OC\Remote;
use OC\Remote\Api\NotFoundException;
use OCP\Http\Client\IClientService;
use OCP\ICache;
use OCP\Remote\IInstance;
/**
* Provides some basic info about a remote Nextcloud instance
*/
class Instance implements IInstance {
/** @var string */
private $url;
/** @var ICache */
private $cache;
/** @var IClientService */
private $clientService;
/** @var array|null */
private $status;
/**
* @param string $url
* @param ICache $cache
* @param IClientService $clientService
*/
public function __construct($url, ICache $cache, IClientService $clientService) {
$url = str_replace('https://', '', $url);
$this->url = str_replace('http://', '', $url);
$this->cache = $cache;
$this->clientService = $clientService;
}
/**
* @return string The url of the remote server without protocol
*/
public function getUrl() {
return $this->url;
}
/**
* @return string The of of the remote server with protocol
*/
public function getFullUrl() {
return $this->getProtocol() . '://' . $this->getUrl();
}
/**
* @return string The full version string in '13.1.2.3' format
*/
public function getVersion() {
$status = $this->getStatus();
return $status['version'];
}
/**
* @return string 'http' or 'https'
*/
public function getProtocol() {
$status = $this->getStatus();
return $status['protocol'];
}
/**
* Check that the remote server is installed and not in maintenance mode
*
* @return bool
*/
public function isActive() {
$status = $this->getStatus();
return $status['installed'] && !$status['maintenance'];
}
/**
* @return array
* @throws NotFoundException
* @throws \Exception
*/
private function getStatus() {
if ($this->status) {
return $this->status;
}
$key = 'remote/' . $this->url . '/status';
$httpsKey = 'remote/' . $this->url . '/https';
$status = $this->cache->get($key);
if (!$status) {
$response = $this->downloadStatus('https://' . $this->getUrl() . '/status.php');
$protocol = 'https';
if (!$response) {
if ($status = $this->cache->get($httpsKey)) {
throw new \Exception('refusing to connect to remote instance(' . $this->url . ') over http that was previously accessible over https');
}
$response = $this->downloadStatus('http://' . $this->getUrl() . '/status.php');
$protocol = 'http';
} else {
$this->cache->set($httpsKey, true, 60 * 60 * 24 * 365);
}
$status = json_decode($response, true);
if ($status) {
$status['protocol'] = $protocol;
}
if ($status) {
$this->cache->set($key, $status, 5 * 60);
$this->status = $status;
} else {
throw new NotFoundException('Remote server not found at address ' . $this->url);
}
}
return $status;
}
/**
* @param string $url
* @return bool|string
*/
private function downloadStatus($url) {
try {
$request = $this->clientService->newClient()->get($url);
return $request->getBody();
} catch (\Exception $e) {
return false;
}
}
}