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https://github.com/nextcloud/server.git
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137 lines
3.7 KiB
PHP
137 lines
3.7 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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namespace OC\OCM;
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use GuzzleHttp\Exception\ConnectException;
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use JsonException;
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use OCP\AppFramework\Http;
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use OCP\Http\Client\IClientService;
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use OCP\ICache;
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use OCP\ICacheFactory;
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use OCP\IConfig;
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use OCP\OCM\Exceptions\OCMProviderException;
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use OCP\OCM\IOCMDiscoveryService;
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use OCP\OCM\IOCMProvider;
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use Psr\Log\LoggerInterface;
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/**
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* @since 28.0.0
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*/
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class OCMDiscoveryService implements IOCMDiscoveryService {
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private ICache $cache;
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private array $supportedAPIVersion =
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[
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'1.0-proposal1',
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'1.0',
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'1.1'
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];
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public function __construct(
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ICacheFactory $cacheFactory,
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private IClientService $clientService,
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private IConfig $config,
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private IOCMProvider $provider,
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private LoggerInterface $logger,
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) {
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$this->cache = $cacheFactory->createDistributed('ocm-discovery');
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}
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/**
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* @param string $remote
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* @param bool $skipCache
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*
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* @return IOCMProvider
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* @throws OCMProviderException
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*/
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public function discover(string $remote, bool $skipCache = false): IOCMProvider {
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$remote = rtrim($remote, '/');
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if (!str_starts_with($remote, 'http://') && !str_starts_with($remote, 'https://')) {
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// if scheme not specified, we test both;
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try {
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return $this->discover('https://' . $remote, $skipCache);
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} catch (OCMProviderException|ConnectException) {
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return $this->discover('http://' . $remote, $skipCache);
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}
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}
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if (!$skipCache) {
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try {
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$cached = $this->cache->get($remote);
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if ($cached === false) {
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throw new OCMProviderException('Previous discovery failed.');
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}
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$this->provider->import(json_decode($cached ?? '', true, 8, JSON_THROW_ON_ERROR) ?? []);
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if ($this->supportedAPIVersion($this->provider->getApiVersion())) {
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return $this->provider; // if cache looks valid, we use it
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}
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} catch (JsonException|OCMProviderException $e) {
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// we ignore cache on issues
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}
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}
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$client = $this->clientService->newClient();
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try {
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$response = $client->get(
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$remote . '/ocm-provider/',
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[
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'timeout' => 10,
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'verify' => !$this->config->getSystemValueBool('sharing.federation.allowSelfSignedCertificates'),
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'connect_timeout' => 10,
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]
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);
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if ($response->getStatusCode() === Http::STATUS_OK) {
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$body = $response->getBody();
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// update provider with data returned by the request
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$this->provider->import(json_decode($body, true, 8, JSON_THROW_ON_ERROR) ?? []);
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$this->cache->set($remote, $body, 60 * 60 * 24);
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}
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} catch (JsonException|OCMProviderException $e) {
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$this->cache->set($remote, false, 5 * 60);
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throw new OCMProviderException('data returned by remote seems invalid - ' . ($body ?? ''));
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} catch (\Exception $e) {
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$this->cache->set($remote, false, 5 * 60);
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$this->logger->warning('error while discovering ocm provider', [
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'exception' => $e,
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'remote' => $remote
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]);
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throw new OCMProviderException('error while requesting remote ocm provider');
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}
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if (!$this->supportedAPIVersion($this->provider->getApiVersion())) {
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$this->cache->set($remote, false, 5 * 60);
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throw new OCMProviderException('API version not supported');
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}
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return $this->provider;
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}
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/**
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* Check the version from remote is supported.
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* The minor version of the API will be ignored:
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* 1.0.1 is identified as 1.0
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*
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* @param string $version
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*
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* @return bool
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*/
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private function supportedAPIVersion(string $version): bool {
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$dot1 = strpos($version, '.');
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$dot2 = strpos($version, '.', $dot1 + 1);
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if ($dot2 > 0) {
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$version = substr($version, 0, $dot2);
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}
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return (in_array($version, $this->supportedAPIVersion));
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}
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}
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