1 files changed, 80 insertions, 0 deletions
diff --git a/apps/settings/lib/SetupChecks/InternetConnectivity.php b/apps/settings/lib/SetupChecks/InternetConnectivity.php
new file mode 100644
index 00000000000..18f2af63b8d
--- /dev/null
+++ b/apps/settings/lib/SetupChecks/InternetConnectivity.php
@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\Settings\SetupChecks;
+
+use OCP\Http\Client\IClientService;
+use OCP\IConfig;
+use OCP\IL10N;
+use OCP\SetupCheck\ISetupCheck;
+use OCP\SetupCheck\SetupResult;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Checks if the server can connect to the internet using HTTPS and HTTP
+ */
+class InternetConnectivity implements ISetupCheck {
+	public function __construct(
+		private IL10N $l10n,
+		private IConfig $config,
+		private IClientService $clientService,
+		private LoggerInterface $logger,
+	) {
+	}
+
+	public function getCategory(): string {
+		return 'network';
+	}
+
+	public function getName(): string {
+		return $this->l10n->t('Internet connectivity');
+	}
+
+	public function run(): SetupResult {
+		if ($this->config->getSystemValue('has_internet_connection', true) === false) {
+			return SetupResult::success($this->l10n->t('Internet connectivity is disabled in configuration file.'));
+		}
+
+		$siteArray = $this->config->getSystemValue('connectivity_check_domains', [
+			'https://www.nextcloud.com', 'https://www.startpage.com', 'https://www.eff.org', 'https://www.edri.org'
+		]);
+
+		foreach ($siteArray as $site) {
+			if ($this->isSiteReachable($site)) {
+				// successful as soon as one connection succeeds
+				return SetupResult::success();
+			}
+		}
+		return SetupResult::warning($this->l10n->t('This server has no working internet connection: Multiple endpoints could not be reached. This means that some of the features like mounting external storage, notifications about updates or installation of third-party apps will not work. Accessing files remotely and sending of notification emails might not work, either. Establish a connection from this server to the internet to enjoy all features.'));
+	}
+
+	/**
+	 * Checks if the Nextcloud server can connect to a specific URL
+	 * @param string $site site domain or full URL with http/https protocol
+	 * @return bool success/failure
+	 */
+	private function isSiteReachable(string $site): bool {
+		// if there is no protocol specified, test http:// first then, if necessary, https://
+		if (preg_match('/^https?:\/\//', $site) !== 1) {
+			$httpSite = 'http://' . $site . '/';
+			$httpsSite = 'https://' . $site . '/';
+			return $this->isSiteReachable($httpSite) || $this->isSiteReachable($httpsSite);
+		}
+		try {
+			$client = $this->clientService->newClient();
+			$client->get($site);
+		} catch (\Exception $e) {
+			$this->logger->error('Cannot connect to: ' . $site, [
+				'app' => 'internet_connection_check',
+				'exception' => $e,
+			]);
+			return false;
+		}
+		return true;
+	}
+}