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feat(dav): introduce paginate with custom headers
Signed-off-by: Benjamin Gaussorgues <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,28 @@ | ||
| <?php | ||
|
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| declare(strict_types=1); | ||
|
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| /** | ||
| * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors | ||
| * SPDX-License-Identifier: AGPL-3.0-or-later | ||
| */ | ||
|
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| namespace OCA\DAV\BackgroundJob; | ||
|
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| use OC\BackgroundJob\Job; | ||
| use OCA\DAV\Paginate\PaginateCache; | ||
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| class CleanupPaginateCacheJob extends Job { | ||
|
Check failure on line 15 in apps/dav/lib/BackgroundJob/CleanupPaginateCacheJob.php
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| /** @var PaginateCache */ | ||
| private $cache; | ||
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| public function __construct(PaginateCache $cache) { | ||
| $this->cache = $cache; | ||
| } | ||
|
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| public function run($argument) { | ||
| $this->cache->cleanup(); | ||
| } | ||
|
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| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| <?php | ||
|
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| declare(strict_types=1); | ||
|
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| /** | ||
| * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors | ||
| * SPDX-License-Identifier: AGPL-3.0-or-later | ||
| */ | ||
|
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| namespace OCA\DAV\Migration; | ||
|
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| use OCP\DB\ISchemaWrapper; | ||
| use OCP\DB\Types; | ||
| use OCP\Migration\IOutput; | ||
| use OCP\Migration\SimpleMigrationStep; | ||
|
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| class Version1032Date20241011093632 extends SimpleMigrationStep { | ||
| public function name(): string { | ||
| return 'Add dav_page_cache table'; | ||
| } | ||
|
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| public function description(): string { | ||
| return 'Add table to cache webdav multistatus responses for pagination purpose'; | ||
| } | ||
|
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| public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) { | ||
| /** @var ISchemaWrapper $schema */ | ||
| $schema = $schemaClosure(); | ||
|
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| if (!$schema->hasTable('dav_page_cache')) { | ||
| $table = $schema->createTable('dav_page_cache'); | ||
|
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| $table->addColumn('id', Types::BIGINT, [ | ||
| 'autoincrement' => true | ||
| ]); | ||
| $table->addColumn('url_hash', Types::STRING, [ | ||
| 'notnull' => true, | ||
| 'length' => 32, | ||
| ]); | ||
| $table->addColumn('token', Types::STRING, [ | ||
| 'notnull' => true, | ||
| 'length' => 32 | ||
| ]); | ||
| $table->addColumn('result_index', Types::INTEGER, [ | ||
| 'notnull' => true | ||
| ]); | ||
| $table->addColumn('result_value', Types::TEXT, [ | ||
| 'notnull' => false, | ||
| ]); | ||
| $table->addColumn('insert_time', Types::DATETIME, [ | ||
| 'notnull' => true, | ||
| ]); | ||
|
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| $table->setPrimaryKey(['id'], 'dav_page_cache_id_index'); | ||
| $table->addIndex(['token', 'url_hash'], 'dav_page_cache_token_url'); | ||
| $table->addUniqueIndex(['token', 'url_hash', 'result_index'], 'dav_page_cache_url_index'); | ||
| $table->addIndex(['result_index'], 'dav_page_cache_index'); | ||
| $table->addIndex(['insert_time'], 'dav_page_cache_time'); | ||
| } | ||
|
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| return $schema; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
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| /** | ||
| * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors | ||
| * SPDX-License-Identifier: AGPL-3.0-or-later | ||
| */ | ||
|
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| namespace OCA\DAV\Paginate; | ||
|
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| /** | ||
| * Save a copy of the first X items into a separate iterator | ||
| * | ||
| * this allows us to pass the iterator to the cache while keeping a copy | ||
| * of the first X items | ||
| */ | ||
| class LimitedCopyIterator extends \AppendIterator { | ||
|
Check failure on line 18 in apps/dav/lib/Paginate/LimitedCopyIterator.php
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| /** @var array */ | ||
| private array $copy = []; | ||
|
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| public function __construct(\Traversable $iterator, int $count) { | ||
| parent::__construct(); | ||
|
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| if (!$iterator instanceof \Iterator) { | ||
| $iterator = new \IteratorIterator($iterator); | ||
| } | ||
| $iterator = new \NoRewindIterator($iterator); | ||
|
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| while ($iterator->valid() && count($this->copy) < $count) { | ||
| $this->copy[] = $iterator->current(); | ||
| $iterator->next(); | ||
| } | ||
|
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| $this->append($this->getFirstItems()); | ||
| $this->append($iterator); | ||
| } | ||
|
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| public function getFirstItems(): \Iterator { | ||
| return new \ArrayIterator($this->copy); | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,89 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
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| /** | ||
| * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors | ||
| * SPDX-License-Identifier: AGPL-3.0-or-later | ||
| */ | ||
|
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| namespace OCA\DAV\Paginate; | ||
|
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| use OCP\AppFramework\Utility\ITimeFactory; | ||
| use OCP\DB\QueryBuilder\IQueryBuilder; | ||
| use OCP\IDBConnection; | ||
| use OCP\Security\ISecureRandom; | ||
|
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| class PaginateCache { | ||
| public const TTL = 3600; | ||
|
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| public function __construct( | ||
| private IDBConnection $database, | ||
| private ISecureRandom $random, | ||
| private ITimeFactory $timeFactory, | ||
| ) { | ||
| } | ||
|
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| public function store(string $uri, \Iterator $items): array { | ||
| $token = $this->random->generate(32); | ||
| $now = $this->timeFactory->getTime(); | ||
|
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| $query = $this->database->getQueryBuilder(); | ||
| $query->insert('dav_page_cache') | ||
| ->values([ | ||
| 'url_hash' => $query->createNamedParameter(md5($uri), IQueryBuilder::PARAM_STR), | ||
| 'token' => $query->createNamedParameter($token, IQueryBuilder::PARAM_STR), | ||
| 'insert_time' => $query->createNamedParameter($now, IQueryBuilder::PARAM_INT), | ||
| 'result_index' => $query->createParameter('index'), | ||
| 'result_value' => $query->createParameter('value'), | ||
| ]); | ||
|
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| $count = 0; | ||
| foreach ($items as $item) { | ||
| $value = json_encode($item); | ||
| $query->setParameter('index', $count, IQueryBuilder::PARAM_INT); | ||
| $query->setParameter('value', $value); | ||
| $query->executeStatement(); | ||
| $count++; | ||
| } | ||
|
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| return [$token, $count]; | ||
| } | ||
|
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| /** | ||
| * @param string $url | ||
| * @param string $token | ||
| * @param int $offset | ||
| * @param int $count | ||
| * @return array|\Traversable | ||
| */ | ||
| public function get(string $url, string $token, int $offset, int $count) { | ||
| $query = $this->database->getQueryBuilder(); | ||
| $query->select(['result_value']) | ||
| ->from('dav_page_cache') | ||
| ->where($query->expr()->eq('token', $query->createNamedParameter($token))) | ||
| ->andWhere($query->expr()->eq('url_hash', $query->createNamedParameter(md5($url)))) | ||
| ->andWhere($query->expr()->gte('result_index', $query->createNamedParameter($offset, IQueryBuilder::PARAM_INT))) | ||
| ->andWhere($query->expr()->lt('result_index', $query->createNamedParameter($offset + $count, IQueryBuilder::PARAM_INT))); | ||
|
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| $result = $query->executeQuery(); | ||
| return array_map(function (string $entry) { | ||
| return json_decode($entry, true); | ||
| }, $result->fetchAll(\PDO::FETCH_COLUMN)); | ||
| } | ||
|
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| public function cleanup(): void { | ||
| $now = $this->timeFactory->getTime(); | ||
|
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| $query = $this->database->getQueryBuilder(); | ||
| $query->delete('dav_page_cache') | ||
| ->where($query->expr()->lt('insert_time', $query->createNamedParameter($now - self::TTL))); | ||
| $query->executeStatement(); | ||
| } | ||
|
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| public function clear(): void { | ||
| $query = $this->database->getQueryBuilder(); | ||
| $query->delete('dav_page_cache'); | ||
| $query->executeStatement(); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| <?php | ||
|
|
||
| declare(strict_types=1); | ||
|
|
||
| /** | ||
| * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors | ||
| * SPDX-License-Identifier: AGPL-3.0-only | ||
| */ | ||
|
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| namespace OCA\DAV\Paginate; | ||
|
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| use Sabre\DAV\Server; | ||
| use Sabre\DAV\ServerPlugin; | ||
| use Sabre\HTTP\RequestInterface; | ||
| use Sabre\HTTP\ResponseInterface; | ||
|
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| class PaginatePlugin extends ServerPlugin { | ||
| public const PAGINATE_HEADER = 'x-nc-paginate'; | ||
| public const PAGINATE_TOTAL_HEADER = 'x-nc-paginate-total'; | ||
| public const PAGINATE_TOKEN_HEADER = 'x-nc-paginate-token'; | ||
| public const PAGINATE_OFFSET_HEADER = 'x-nc-paginate-offset'; | ||
| public const PAGINATE_COUNT_HEADER = 'x-nc-paginate-count'; | ||
|
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| /** @var Server */ | ||
| private $server; | ||
|
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| public function __construct( | ||
| private PaginateCache $cache, | ||
| private int $pageSize = 100, | ||
| ) { | ||
| } | ||
|
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| public function initialize(Server $server): void { | ||
| $this->server = $server; | ||
| $server->on('beforeMultiStatus', [$this, 'onMultiStatus']); | ||
| $server->on('method:SEARCH', [$this, 'onMethod'], 1); | ||
| $server->on('method:PROPFIND', [$this, 'onMethod'], 1); | ||
| $server->on('method:REPORT', [$this, 'onMethod'], 1); | ||
| } | ||
|
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| public function getFeatures(): array { | ||
| return ['nc-paginate']; | ||
| } | ||
|
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| public function onMultiStatus(&$fileProperties): void { | ||
| $request = $this->server->httpRequest; | ||
| if (is_array($fileProperties)) { | ||
| $fileProperties = new \ArrayIterator($fileProperties); | ||
| } | ||
| if ( | ||
| $request->hasHeader(self::PAGINATE_HEADER) && | ||
| !$request->hasHeader(self::PAGINATE_TOKEN_HEADER) | ||
| ) { | ||
| $url = $request->getUrl(); | ||
|
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| $pageSize = (int)$request->getHeader(self::PAGINATE_COUNT_HEADER) ?: $this->pageSize; | ||
| $copyIterator = new LimitedCopyIterator($fileProperties, $pageSize); | ||
| [$token, $count] = $this->cache->store($url, $copyIterator); | ||
|
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| $fileProperties = $copyIterator->getFirstItems(); | ||
| $this->server->httpResponse->addHeader(self::PAGINATE_HEADER, 'true'); | ||
| $this->server->httpResponse->addHeader(self::PAGINATE_TOKEN_HEADER, $token); | ||
| $this->server->httpResponse->addHeader(self::PAGINATE_TOTAL_HEADER, $count); | ||
| } | ||
| } | ||
|
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| public function onMethod(RequestInterface $request, ResponseInterface $response) { | ||
| if ( | ||
| $request->hasHeader(self::PAGINATE_TOKEN_HEADER) && | ||
| $request->hasHeader(self::PAGINATE_OFFSET_HEADER) | ||
| ) { | ||
| $url = $this->server->httpRequest->getUrl(); | ||
| $token = $request->getHeader(self::PAGINATE_TOKEN_HEADER); | ||
| $offset = (int)$request->getHeader(self::PAGINATE_OFFSET_HEADER); | ||
| $count = (int)$request->getHeader(self::PAGINATE_COUNT_HEADER) ?: $this->pageSize; | ||
|
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| $items = $this->cache->get($url, $token, $offset, $count); | ||
|
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| $response->setStatus(207); | ||
| $response->addHeader(self::PAGINATE_HEADER, 'true'); | ||
| $response->setHeader('Content-Type', 'application/xml; charset=utf-8'); | ||
| $response->setHeader('Vary', 'Brief,Prefer'); | ||
|
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| $prefer = $this->server->getHTTPPrefer(); | ||
| $minimal = $prefer['return'] === 'minimal'; | ||
|
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| $data = $this->server->generateMultiStatus($items, $minimal); | ||
| $response->setBody($data); | ||
| return false; | ||
| } | ||
| } | ||
| } |
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