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<?php declare(strict_types=1);
/**
* @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 SearchDAV\DAV;
use Sabre\DAV\INode;
use Sabre\DAV\PropFind;
use Sabre\DAV\Server;
use Sabre\DAV\ServerPlugin;
use Sabre\HTTP\RequestInterface;
use Sabre\HTTP\ResponseInterface;
use Sabre\Xml\ParseException;
use SearchDAV\Backend\ISearchBackend;
use SearchDAV\XML\SupportedQueryGrammar;
class SearchPlugin extends ServerPlugin {
const SEARCHDAV_NS = 'https://github.com/icewind1991/SearchDAV/ns';
/** @var ISearchBackend */
private $searchBackend;
/** @var QueryParser */
private $queryParser;
/** @var PathHelper */
private $pathHelper;
/** @var SearchHandler */
private $search;
/** @var DiscoverHandler */
private $discover;
public function __construct(ISearchBackend $searchBackend) {
$this->searchBackend = $searchBackend;
$this->queryParser = new QueryParser();
}
public function initialize(Server $server): void {
$this->pathHelper = new PathHelper($server);
$this->search = new SearchHandler($this->searchBackend, $this->pathHelper, $server);
$this->discover = new DiscoverHandler($this->searchBackend, $this->pathHelper, $this->queryParser);
$server->on('method:SEARCH', [$this, 'searchHandler']);
$server->on('afterMethod:OPTIONS', [$this, 'optionHandler']);
$server->on('propFind', [$this, 'propFindHandler']);
}
public function propFindHandler(PropFind $propFind, INode $node): void {
if ($propFind->getPath() === $this->searchBackend->getArbiterPath()) {
$propFind->handle('{DAV:}supported-query-grammar-set', new SupportedQueryGrammar());
}
}
/**
* SEARCH is allowed for users files
*
* @param string $path
* @return string[]
*/
public function getHTTPMethods($path): array {
$path = $this->pathHelper->getPathFromUri($path);
if ($this->searchBackend->getArbiterPath() === $path) {
return ['SEARCH'];
} else {
return [];
}
}
public function optionHandler(RequestInterface $request, ResponseInterface $response): void {
if ($request->getPath() === $this->searchBackend->getArbiterPath()) {
$response->addHeader('DASL', '<DAV:basicsearch>');
}
}
public function searchHandler(RequestInterface $request, ResponseInterface $response): bool {
$contentType = $request->getHeader('Content-Type') ?? '';
// Currently, we only support xml search queries
if ((strpos($contentType, 'text/xml') === false) && (strpos($contentType, 'application/xml') === false)) {
return true;
}
if ($request->getPath() !== $this->searchBackend->getArbiterPath()) {
return true;
}
try {
$xml = $this->queryParser->parse(
$request->getBodyAsString(),
$request->getUrl(),
$documentType
);
} catch (ParseException $e) {
$response->setStatus(400);
$response->setBody('Parse error: ' . $e->getMessage());
return false;
}
switch ($documentType) {
case '{DAV:}searchrequest':
return $this->search->handleSearchRequest($xml, $response);
case '{DAV:}query-schema-discovery':
return $this->discover->handelDiscoverRequest($xml, $request, $response);
default:
$response->setStatus(400);
$response->setBody('Unexpected document type: ' . $documentType . ' for this Content-Type, expected {DAV:}searchrequest or {DAV:}query-schema-discovery');
return false;
}
}
}
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