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<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
namespace OCA\DAV\DAV;
use Sabre\DAV\Auth\Backend\BackendInterface;
use Sabre\HTTP\RequestInterface;
use Sabre\HTTP\ResponseInterface;
class PublicAuth implements BackendInterface {
/** @var string[] */
private $publicURLs;
public function __construct() {
$this->publicURLs = [
'public-calendars',
'principals/system/public'
];
}
/**
* When this method is called, the backend must check if authentication was
* successful.
*
* The returned value must be one of the following
*
* [true, "principals/username"]
* [false, "reason for failure"]
*
* If authentication was successful, it's expected that the authentication
* backend returns a so-called principal url.
*
* Examples of a principal url:
*
* principals/admin
* principals/user1
* principals/users/joe
* principals/uid/123457
*
* If you don't use WebDAV ACL (RFC3744) we recommend that you simply
* return a string such as:
*
* principals/users/[username]
*
* @param RequestInterface $request
* @param ResponseInterface $response
* @return array
*/
public function check(RequestInterface $request, ResponseInterface $response) {
if ($this->isRequestPublic($request)) {
return [true, 'principals/system/public'];
}
return [false, 'No public access to this resource.'];
}
/**
* @inheritdoc
*/
public function challenge(RequestInterface $request, ResponseInterface $response) {
}
/**
* @param RequestInterface $request
* @return bool
*/
private function isRequestPublic(RequestInterface $request) {
$url = $request->getPath();
$matchingUrls = array_filter($this->publicURLs, function ($publicUrl) use ($url) {
return str_starts_with($url, $publicUrl);
});
return !empty($matchingUrls);
}
}
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