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Editing: WellKnownUrls.php

<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2024 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\IURLGenerator;
use OCP\SetupCheck\CheckServerResponseTrait;
use OCP\SetupCheck\ISetupCheck;
use OCP\SetupCheck\SetupResult;
use Psr\Log\LoggerInterface;

class WellKnownUrls implements ISetupCheck {

use CheckServerResponseTrait;

public function __construct(
		protected IL10N $l10n,
		protected IConfig $config,
		protected IURLGenerator $urlGenerator,
		protected IClientService $clientService,
		protected LoggerInterface $logger,
	) {
	}

public function getCategory(): string {
		return 'network';
	}

public function getName(): string {
		return $this->l10n->t('.well-known URLs');
	}

public function run(): SetupResult {
		if (!$this->config->getSystemValueBool('check_for_working_wellknown_setup', true)) {
			return SetupResult::info($this->l10n->t('`check_for_working_wellknown_setup` is set to false in your configuration, so this check was skipped.'));
		}

$urls = [
			['get', '/.well-known/webfinger', [200, 400, 404], true], // 400 indicates a handler is installed but (correctly) failed because we didn't specify a resource
			['get', '/.well-known/nodeinfo', [200, 404], true],
			['propfind', '/.well-known/caldav', [207], false],
			['propfind', '/.well-known/carddav', [207], false],
		];

$requestOptions = ['httpErrors' => false, 'options' => ['allow_redirects' => ['track_redirects' => true]]];
		foreach ($urls as [$verb,$url,$validStatuses,$checkCustomHeader]) {
			$works = null;
			foreach ($this->runRequest($verb, $url, $requestOptions, isRootRequest: true) as $response) {
				// Check that the response status matches
				$works = in_array($response->getStatusCode(), $validStatuses);
				// and (if needed) the custom Nextcloud header is set
				if ($checkCustomHeader) {
					$works = $works && !empty($response->getHeader('X-NEXTCLOUD-WELL-KNOWN'));
				} else {
					// For default DAV endpoints we lack authorization, but we still can check that the redirect works as expected
					if (!$works && $response->getStatusCode() === 401) {
						$redirectHops = explode(',', $response->getHeader('X-Guzzle-Redirect-History'));
						$effectiveUri = end($redirectHops);
						$works = str_ends_with(rtrim($effectiveUri, '/'), '/remote.php/dav');
					}
				}
				// Skip the other requests if one works
				if ($works === true) {
					break;
				}
			}
			// If 'works' is null then we could not connect to the server
			if ($works === null) {
				return SetupResult::info(
					$this->l10n->t('Could not check that your web server serves `.well-known` correctly. Please check manually.') . "\n" . $this->serverConfigHelp(),
					$this->urlGenerator->linkToDocs('admin-setup-well-known-URL'),
				);
			}
			// Otherwise if we fail we can abort here
			if ($works === false) {
				return SetupResult::warning(
					$this->l10n->t("Your web server is not properly set up to resolve `.well-known` URLs, failed on:\n`%s`", [$url]),
					$this->urlGenerator->linkToDocs('admin-setup-well-known-URL'),
				);
			}
		}
		return SetupResult::success(
			$this->l10n->t('Your server is correctly configured to serve `.well-known` URLs.')
		);
	}
}

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