1 files changed, 83 insertions, 0 deletions
diff --git a/apps/dav/lib/Connector/Sabre/ChecksumUpdatePlugin.php b/apps/dav/lib/Connector/Sabre/ChecksumUpdatePlugin.php
new file mode 100644
index 00000000000..3247259357f
--- /dev/null
+++ b/apps/dav/lib/Connector/Sabre/ChecksumUpdatePlugin.php
@@ -0,0 +1,83 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2021 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 OCA\DAV\Connector\Sabre;
+
+use Sabre\DAV\ServerPlugin;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+
+class ChecksumUpdatePlugin extends ServerPlugin {
+	/**
+	 * @var \Sabre\DAV\Server
+	 */
+	protected $server;
+
+	public function initialize(\Sabre\DAV\Server $server) {
+		$this->server = $server;
+		$server->on('method:PATCH', [$this, 'httpPatch']);
+	}
+
+	public function getPluginName(): string {
+		return 'checksumupdate';
+	}
+
+	public function getHTTPMethods($path): array {
+		$tree = $this->server->tree;
+
+		if ($tree->nodeExists($path)) {
+			$node = $tree->getNodeForPath($path);
+			if ($node instanceof File) {
+				return ['PATCH'];
+			}
+		}
+
+		return [];
+	}
+
+	public function getFeatures(): array {
+		return ['nextcloud-checksum-update'];
+	}
+
+	public function httpPatch(RequestInterface $request, ResponseInterface $response) {
+		$path = $request->getPath();
+
+		$node = $this->server->tree->getNodeForPath($path);
+		if ($node instanceof File) {
+			$type = strtolower(
+				(string)$request->getHeader('X-Recalculate-Hash')
+			);
+
+			$hash = $node->hash($type);
+			if ($hash) {
+				$checksum = strtoupper($type) . ':' . $hash;
+				$node->setChecksum($checksum);
+				$response->addHeader('OC-Checksum', $checksum);
+				$response->setHeader('Content-Length', '0');
+				$response->setStatus(204);
+
+				return false;
+			}
+		}
+	}
+}