feat: add oc-ownerid and oc-permissions headers on PUT DAV requests

apps/dav/composer/composer/autoload_classmap.php

@@ -209,6 +209,7 @@
     'OCA\\DAV\\ConfigLexicon' => $baseDir . '/../lib/ConfigLexicon.php',
     'OCA\\DAV\\Connector\\LegacyDAVACL' => $baseDir . '/../lib/Connector/LegacyDAVACL.php',
     'OCA\\DAV\\Connector\\LegacyPublicAuth' => $baseDir . '/../lib/Connector/LegacyPublicAuth.php',
+    'OCA\\DAV\\Connector\\Sabre\\AddExtraHeadersPlugin' => $baseDir . '/../lib/Connector/Sabre/AddExtraHeadersPlugin.php',
     'OCA\\DAV\\Connector\\Sabre\\AnonymousOptionsPlugin' => $baseDir . '/../lib/Connector/Sabre/AnonymousOptionsPlugin.php',
     'OCA\\DAV\\Connector\\Sabre\\AppleQuirksPlugin' => $baseDir . '/../lib/Connector/Sabre/AppleQuirksPlugin.php',
     'OCA\\DAV\\Connector\\Sabre\\Auth' => $baseDir . '/../lib/Connector/Sabre/Auth.php',

apps/dav/composer/composer/autoload_static.php

@@ -224,6 +224,7 @@ class ComposerStaticInitDAV
         'OCA\\DAV\\ConfigLexicon' => __DIR__ . '/..' . '/../lib/ConfigLexicon.php',
         'OCA\\DAV\\Connector\\LegacyDAVACL' => __DIR__ . '/..' . '/../lib/Connector/LegacyDAVACL.php',
         'OCA\\DAV\\Connector\\LegacyPublicAuth' => __DIR__ . '/..' . '/../lib/Connector/LegacyPublicAuth.php',
+        'OCA\\DAV\\Connector\\Sabre\\AddExtraHeadersPlugin' => __DIR__ . '/..' . '/../lib/Connector/Sabre/AddExtraHeadersPlugin.php',
         'OCA\\DAV\\Connector\\Sabre\\AnonymousOptionsPlugin' => __DIR__ . '/..' . '/../lib/Connector/Sabre/AnonymousOptionsPlugin.php',
         'OCA\\DAV\\Connector\\Sabre\\AppleQuirksPlugin' => __DIR__ . '/..' . '/../lib/Connector/Sabre/AppleQuirksPlugin.php',
         'OCA\\DAV\\Connector\\Sabre\\Auth' => __DIR__ . '/..' . '/../lib/Connector/Sabre/Auth.php',

apps/dav/lib/Connector/Sabre/AddExtraHeadersPlugin.php

@@ -0,0 +1,69 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OCA\DAV\Connector\Sabre;
+
+use Psr\Log\LoggerInterface;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\Server;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+
+/**
+ * Adds the "OC-OwnerId" and "OC-Permissions" after PUT requests so that
+ * clients don't need to do a propfind after uploading a file to decide what
+ * to display.
+ */
+class AddExtraHeadersPlugin extends \Sabre\DAV\ServerPlugin {
+
+	private ?Server $server = null;
+
+	public function __construct(
+		private LoggerInterface $logger,
+		private bool $isPublic = false,
+	) {
+	}
+
+	public function initialize(Server $server): void {
+		$this->server = $server;
+
+		$server->on('afterMethod:PUT', $this->afterPut(...));
+	}
+
+	private function afterPut(RequestInterface $request, ResponseInterface $response): void {
+		if ($this->server === null) {
+			return;
+		}
+
+		$node = null;
+		try {
+			$node = $this->server->tree->getNodeForPath($request->getPath());
+		} catch (NotFound) {
+			$this->logger->error("Cannot set extra headers for non-existing file '{$request->getPath()}'");
+			return;
+		}
+
+		if (!$node instanceof Node) {
+			$nodeType = get_debug_type($node);
+			$this->logger->error("Cannot set extra headers for node of type {$nodeType} for file '{$request->getPath()}'");
+			return;
+		}
+
+		if (!$this->isPublic) {
+			$ownerId = $node->getOwner()?->getUID();
+			if ($ownerId !== null) {
+				$response->setHeader('X-NC-OwnerId', $ownerId);
+			}
+		}
+
+		$permissions = $this->isPublic ? $node->getPublicDavPermissions()
+			: $node->getDavPermissions();
+
+		$response->setHeader('X-NC-Permissions', $permissions);
+	}
+}

apps/dav/lib/Connector/Sabre/FilesPlugin.php

@@ -40,6 +40,7 @@
 use Sabre\HTTP\ResponseInterface;
 
 class FilesPlugin extends ServerPlugin {
+
 	// namespace
 	public const NS_OWNCLOUD = 'http://owncloud.org/ns';
 	public const NS_NEXTCLOUD = 'http://nextcloud.org/ns';
@@ -316,12 +317,7 @@ public function handleGetProperties(PropFind $propFind, \Sabre\DAV\INode $node)
 			});
 
 			$propFind->handle(self::PERMISSIONS_PROPERTYNAME, function () use ($node) {
-				$perms = $node->getDavPermissions();
-				if ($this->isPublic) {
-					// remove mount information
-					$perms = str_replace(['S', 'M'], '', $perms);
-				}
-				return $perms;
+				return $this->isPublic ? $node->getPublicDavPermissions() : $node->getDavPermissions();
 			});
 
 			$propFind->handle(self::SHARE_PERMISSIONS_PROPERTYNAME, function () use ($node, $httpRequest) {

apps/dav/lib/Connector/Sabre/Node.php

@@ -337,6 +337,13 @@ public function getDavPermissions() {
 		return DavUtil::getDavPermissions($this->info);
 	}
 
+	/**
+	 * Returns the DAV Permissions with share and mount infromation stripped.
+	 */
+	public function getPublicDavPermissions(): string {
+		return str_replace(['S', 'M'], '', $this->getDavPermissions());
+	}
+
 	public function getOwner() {
 		return $this->info->getOwner();
 	}

apps/dav/lib/Connector/Sabre/ServerFactory.php

@@ -209,6 +209,7 @@ public function createServer(
 				);
 			}
 			$server->addPlugin(new CopyEtagHeaderPlugin());
+			$server->addPlugin(new AddExtraHeadersPlugin($this->logger, $isPublicShare));
 
 			// Load dav plugins from apps
 			$event = new SabrePluginEvent($server);

apps/dav/lib/Server.php

@@ -27,6 +27,7 @@
 use OCA\DAV\CardDAV\Security\CardDavRateLimitingPlugin;
 use OCA\DAV\CardDAV\Validation\CardDavValidatePlugin;
 use OCA\DAV\Comments\CommentsPlugin;
+use OCA\DAV\Connector\Sabre\AddExtraHeadersPlugin;
 use OCA\DAV\Connector\Sabre\AnonymousOptionsPlugin;
 use OCA\DAV\Connector\Sabre\AppleQuirksPlugin;
 use OCA\DAV\Connector\Sabre\Auth;
@@ -384,6 +385,7 @@ public function __construct(
 						)
 					);
 				}
+				$this->server->addPlugin(new AddExtraHeadersPlugin($logger, false));
 				$this->server->addPlugin(new EnablePlugin(
 					\OCP\Server::get(IConfig::class),
 					\OCP\Server::get(BirthdayService::class),

apps/dav/tests/unit/Connector/Sabre/AddExtraHeadersPluginTest.php

@@ -0,0 +1,130 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace unit\Connector\Sabre;
+
+use LogicException;
+use OCA\DAV\Connector\Sabre\AddExtraHeadersPlugin;
+use OCA\DAV\Connector\Sabre\Node;
+use OCA\DAV\Connector\Sabre\Server;
+use OCP\IUser;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\MockObject\MockObject;
+use Psr\Log\LoggerInterface;
+use Sabre\DAV\Exception\NotFound;
+use Sabre\DAV\Tree;
+use Sabre\HTTP\RequestInterface;
+use Sabre\HTTP\ResponseInterface;
+use Test\TestCase;
+
+class AddExtraHeadersPluginTest extends TestCase {
+
+	private AddExtraHeadersPlugin $plugin;
+	private Server&MockObject $server;
+	private LoggerInterface&MockObject $logger;
+	private RequestInterface&MockObject $request;
+	private ResponseInterface&MockObject $response;
+	private Tree&MockObject $tree;
+
+	public static function afterPutData(): array {
+		return [
+			'owner and permissions present' => [
+				'user', true, 'PERMISSIONS', true, 2
+			],
+			'permissions only' => [
+				null, false, 'PERMISSIONS', true, 1
+			],
+		];
+	}
+
+	public function testAfterPutNotFoundException(): void {
+		$afterPut = null;
+		$this->server->expects($this->once())
+			->method('on')
+			->willReturnCallback(
+				function ($method, $callback) use (&$afterPut) {
+					$this->assertSame('afterMethod:PUT', $method);
+					$afterPut = $callback;
+				});
+
+		$this->plugin->initialize($this->server);
+		$node = $this->createMock(Node::class);
+		$this->tree->expects($this->once())->method('getNodeForPath')
+			->willThrowException(new NotFound());
+
+		$this->logger->expects($this->once())->method('error');
+
+		$afterPut($this->request, $this->response);
+	}
+
+	#[DataProvider('afterPutData')]
+	public function testAfterPut(?string $ownerId, bool $expectOwnerIdHeader,
+		?string $permissions, bool $expectPermissionsHeader,
+		int $expectedInvocations): void {
+		$afterPut = null;
+		$this->server->expects($this->once())
+			->method('on')
+			->willReturnCallback(
+				function ($method, $callback) use (&$afterPut) {
+					$this->assertSame('afterMethod:PUT', $method);
+					$afterPut = $callback;
+				});
+
+		$this->plugin->initialize($this->server);
+		$node = $this->createMock(Node::class);
+		$this->tree->expects($this->once())->method('getNodeForPath')
+			->willReturn($node);
+
+		$user = $this->createMock(IUser::class);
+		$node->expects($this->once())->method('getOwner')->willReturn($user);
+		$user->expects($this->once())->method('getUID')->willReturn($ownerId);
+		$node->expects($this->once())->method('getDavPermissions')->willReturn($permissions);
+
+		$matcher = $this->exactly($expectedInvocations);
+		$this->response->expects($matcher)->method('setHeader')
+			->willReturnCallback(function ($name, $value) use (
+				$expectedInvocations,
+				$expectPermissionsHeader,
+				$expectOwnerIdHeader,
+				$matcher,
+				$ownerId, $permissions) {
+				$invocationNumber = $matcher->numberOfInvocations();
+				if ($invocationNumber === 0) {
+					throw new LogicException('No invocations were expected');
+				}
+
+				if (($expectOwnerIdHeader && $expectedInvocations === 1)
+					|| ($expectedInvocations
+						=== 2 && $invocationNumber === 1)) {
+					$this->assertEquals('X-NC-OwnerId', $name);
+					$this->assertEquals($ownerId, $value);
+				}
+
+				if (($expectPermissionsHeader && $expectedInvocations === 1)
+					|| ($expectedInvocations
+						=== 2 && $invocationNumber === 2)) {
+					$this->assertEquals('X-NC-Permissions', $name);
+					$this->assertEquals($permissions, $value);
+				}
+			});
+
+		$afterPut($this->request, $this->response);
+	}
+
+	protected function setUp(): void {
+		parent::setUp();
+
+		$this->server = $this->createMock(Server::class);
+		$this->tree = $this->createMock(Tree::class);
+		$this->server->tree = $this->tree;
+		$this->logger = $this->createMock(LoggerInterface::class);
+		$this->plugin = new AddExtraHeadersPlugin($this->logger, false);
+		$this->request = $this->createMock(RequestInterface::class);
+		$this->response = $this->createMock(ResponseInterface::class);
+	}
+}

apps/dav/tests/unit/Connector/Sabre/FilesPluginTest.php

@@ -327,9 +327,12 @@ public function testGetPublicPermissions(): void {
 
 		/** @var File&MockObject $node */
 		$node = $this->createTestNode(File::class);
-		$node->expects($this->any())
-			->method('getDavPermissions')
-			->willReturn('DWCKMSR');
+		$node->expects($this->once())
+			->method('getPublicDavPermissions')
+			->willReturn('DWCKR');
+
+		$node->expects($this->never())
+			->method('getDavPermissions');
 
 		$this->plugin->handleGetProperties(
 			$propFind,