fix: Handle Depth header for COPY as this is required by RFC

lib/DAV/CorePlugin.php

@@ -589,6 +589,11 @@ public function httpMove(RequestInterface $request, ResponseInterface $response)
 
         $moveInfo = $this->server->getCopyAndMoveInfo($request);
 
+        // MOVE does only allow "infinity" every other header value is considered invalid
+        if ($moveInfo['depth'] !== 'infinity') {
+            throw new BadRequest('The HTTP Depth header must only contain "infinity" for MOVE');
+        }
+
         if ($moveInfo['destinationExists']) {
             if (!$this->server->emit('beforeUnbind', [$moveInfo['destination']])) {
                 return false;
@@ -645,7 +650,7 @@ public function httpCopy(RequestInterface $request, ResponseInterface $response)
         if (!$this->server->emit('beforeBind', [$copyInfo['destination']])) {
             return false;
         }
-        if (!$this->server->emit('beforeCopy', [$path, $copyInfo['destination']])) {
+        if (!$this->server->emit('beforeCopy', [$path, $copyInfo['destination'], $copyInfo['depth']])) {
             return false;
         }
 
@@ -656,8 +661,8 @@ public function httpCopy(RequestInterface $request, ResponseInterface $response)
             $this->server->tree->delete($copyInfo['destination']);
         }
 
-        $this->server->tree->copy($path, $copyInfo['destination']);
-        $this->server->emit('afterCopy', [$path, $copyInfo['destination']]);
+        $this->server->tree->copy($path, $copyInfo['destination'], $copyInfo['depth']);
+        $this->server->emit('afterCopy', [$path, $copyInfo['destination'], $copyInfo['depth']]);
         $this->server->emit('afterBind', [$copyInfo['destination']]);
 
         // If a resource was overwritten we should send a 204, otherwise a 201

lib/DAV/ICopyTarget.php

@@ -31,8 +31,11 @@ interface ICopyTarget extends ICollection
      * @param string $targetName new local file/collection name
      * @param string $sourcePath Full path to source node
      * @param INode  $sourceNode Source node itself
+     * @param string|int $depth How many level of children to copy.
+     *                          The value can be 'infinity' or a positiv number including zero.
+     *                          Zero means to only copy a shallow collection with props but without children.
      *
      * @return bool
      */
-    public function copyInto($targetName, $sourcePath, INode $sourceNode);
+    public function copyInto($targetName, $sourcePath, INode $sourceNode, $depth);
 }

lib/DAV/Server.php

@@ -725,10 +725,17 @@ public function getCopyAndMoveInfo(RequestInterface $request)
             throw new Exception\BadRequest('The destination header was not supplied');
         }
         $destination = $this->calculateUri($request->getHeader('Destination'));
-        $overwrite = $request->getHeader('Overwrite');
-        if (!$overwrite) {
-            $overwrite = 'T';
+
+        // Depth of inifinty is valid for MOVE and COPY. If it is not set the RFC requires to act like it was 'infinity'.
+        $depth = strtolower($request->getHeader('Depth') ?? 'infinity');
+        if ($depth !== 'infinity' && is_numeric($depth)) {
+            $depth = (int)$depth;
+            if ($depth < 0) {
+                throw new Exception\BadRequest('The HTTP Depth header may only be "infinity", 0 or a positiv number');
+            }
         }
+
+        $overwrite = $request->getHeader('Overwrite') ?? 'T';
         if ('T' == strtoupper($overwrite)) {
             $overwrite = true;
         } elseif ('F' == strtoupper($overwrite)) {
@@ -773,6 +780,7 @@ public function getCopyAndMoveInfo(RequestInterface $request)
 
         // These are the three relevant properties we need to return
         return [
+            'depth' => $depth,
             'destination' => $destination,
             'destinationExists' => (bool) $destinationNode,
             'destinationNode' => $destinationNode,

lib/DAV/Tree.php

@@ -137,8 +137,11 @@ public function nodeExists($path)
      *
      * @param string $sourcePath      The source location
      * @param string $destinationPath The full destination path
+     * @param int|string $depth How much levle of children to copy.
+     *                          The value can be 'infinity' or a positiv integer, including zero.
+     *                          Zero means only copy the collection without children but with its properties.
      */
-    public function copy($sourcePath, $destinationPath)
+    public function copy($sourcePath, $destinationPath, $depth = 'infinity')
     {
         $sourceNode = $this->getNodeForPath($sourcePath);
 
@@ -147,8 +150,8 @@ public function copy($sourcePath, $destinationPath)
 
         $destinationParent = $this->getNodeForPath($destinationDir);
         // Check if the target can handle the copy itself. If not, we do it ourselves.
-        if (!$destinationParent instanceof ICopyTarget || !$destinationParent->copyInto($destinationName, $sourcePath, $sourceNode)) {
-            $this->copyNode($sourceNode, $destinationParent, $destinationName);
+        if (!$destinationParent instanceof ICopyTarget || !$destinationParent->copyInto($destinationName, $sourcePath, $sourceNode, $depth)) {
+            $this->copyNode($sourceNode, $destinationParent, $destinationName, $depth);
         }
 
         $this->markDirty($destinationDir);
@@ -178,7 +181,8 @@ public function move($sourcePath, $destinationPath)
                 $moveSuccess = $newParentNode->moveInto($destinationName, $sourcePath, $sourceNode);
             }
             if (!$moveSuccess) {
-                $this->copy($sourcePath, $destinationPath);
+                // Move is a copy with depth = infinity and deleting the source afterwards
+                $this->copy($sourcePath, $destinationPath, 'infinity');
                 $this->getNodeForPath($sourcePath)->delete();
             }
         }
@@ -215,9 +219,13 @@ public function getChildren($path)
             $basePath .= '/';
         }
 
-        foreach ($node->getChildren() as $child) {
-            $this->cache[$basePath.$child->getName()] = $child;
-            yield $child;
+        if ($node instanceof ICollection) {
+            foreach ($node->getChildren() as $child) {
+                $this->cache[$basePath.$child->getName()] = $child;
+                yield $child;
+            }
+        } else {
+            yield from [];
         }
     }
 
@@ -303,8 +311,9 @@ public function getMultipleNodes($paths)
      * copyNode.
      *
      * @param string $destinationName
+     * @param int|string $depth How many children of the node to copy
      */
-    protected function copyNode(INode $source, ICollection $destinationParent, $destinationName = null)
+    protected function copyNode(INode $source, ICollection $destinationParent, ?string $destinationName = null, $depth = 'infinity')
     {
         if ('' === (string) $destinationName) {
             $destinationName = $source->getName();
@@ -326,10 +335,16 @@ protected function copyNode(INode $source, ICollection $destinationParent, $dest
             $destination = $destinationParent->getChild($destinationName);
         } elseif ($source instanceof ICollection) {
             $destinationParent->createDirectory($destinationName);
-
             $destination = $destinationParent->getChild($destinationName);
-            foreach ($source->getChildren() as $child) {
-                $this->copyNode($child, $destination);
+
+            // Copy children if depth is not zero
+            if ($depth !== 0) {
+                // Adjust next depth for children (keep 'infinity' or decrease)
+                $depth = $depth === 'infinity' ? 'infinity' : $depth - 1;
+                $destination = $destinationParent->getChild($destinationName);
+                foreach ($source->getChildren() as $child) {
+                    $this->copyNode($child, $destination, null, $depth);
+                }
             }
         }
         if ($source instanceof IProperties && $destination instanceof IProperties) {

tests/Sabre/DAV/CorePluginTest.php

@@ -4,11 +4,61 @@
 
 namespace Sabre\DAV;
 
+use PHPUnit\Framework\MockObject\MockObject;
+use Sabre\DAV\Exception\BadRequest;
+use Sabre\HTTP;
+
 class CorePluginTest extends \PHPUnit\Framework\TestCase
 {
     public function testGetInfo()
     {
         $corePlugin = new CorePlugin();
         self::assertEquals('core', $corePlugin->getPluginInfo()['name']);
     }
+
+    public function moveInvalidDepthHeaderProvider() {
+        return [
+            [0],
+            [1],
+        ];
+    }
+
+    /**
+     * MOVE does only allow "infinity" every other header value is considered invalid
+     * @dataProvider moveInvalidDepthHeaderProvider
+     */
+    public function testMoveWithInvalidDepth($depthHeader) {
+        $request = new HTTP\Request('MOVE', '/path/');
+        $response = new HTTP\Response();
+
+        /** @var Server|MockObject */
+        $server = $this->getMockBuilder(Server::class)->getMock();
+        $corePlugin = new CorePlugin();
+        $corePlugin->initialize($server);
+
+        $server->expects($this->once())
+            ->method('getCopyAndMoveInfo')
+            ->willReturn(['depth' => $depthHeader]);
+
+        $this->expectException(BadRequest::class);
+        $corePlugin->httpMove($request, $response);
+    }
+
+    /**
+     * MOVE does only allow "infinity" every other header value is considered invalid
+     */
+    public function testMoveSupportsDepth() {
+        $request = new HTTP\Request('MOVE', '/path/');
+        $response = new HTTP\Response();
+
+        /** @var Server|MockObject */
+        $server = $this->getMockBuilder(Server::class)->getMock();
+        $corePlugin = new CorePlugin();
+        $corePlugin->initialize($server);
+
+        $server->expects($this->once())
+            ->method('getCopyAndMoveInfo')
+            ->willReturn(['depth' => 'infinity', 'destinationExists' => true, 'destination' => 'dst']);
+        $corePlugin->httpMove($request, $response);
+    }
 }

tests/Sabre/DAV/FSExt/ServerTest.php

@@ -234,7 +234,10 @@ public function testCopy()
     {
         mkdir($this->tempDir.'/testcol');
 
-        $request = new HTTP\Request('COPY', '/test.txt', ['Destination' => '/testcol/test2.txt']);
+        $request = new HTTP\Request('COPY', '/test.txt', [
+            'Destination' => '/testcol/test2.txt',
+            'Depth' => 'infinity',
+        ]);
         $this->server->httpRequest = ($request);
         $this->server->exec();
 

tests/Sabre/DAV/HttpCopyTest.php

@@ -21,20 +21,29 @@ class HttpCopyTest extends AbstractDAVServerTestCase
      */
     public function setUpTree()
     {
-        $this->tree = new Mock\Collection('root', [
+        $propsCollection = new Mock\PropertiesCollection('propscoll', [
+            'file3' => 'content3',
+            'file4' => 'content4',
+        ], [
+            'my-prop' => 'my-value',
+        ]);
+        $propsCollection->failMode = 'updatepropstrue';
+        $this->tree = new Mock\PropertiesCollection('root', [
             'file1' => 'content1',
             'file2' => 'content2',
-            'coll1' => [
+            'coll1' => new Mock\Collection('coll1', [
                 'file3' => 'content3',
                 'file4' => 'content4',
-            ],
+            ]),
+            'propscoll' => $propsCollection,
         ]);
     }
 
     public function testCopyFile()
     {
         $request = new HTTP\Request('COPY', '/file1', [
             'Destination' => '/file5',
+            'Depth' => 'infinity',
         ]);
         $response = $this->request($request);
         self::assertEquals(201, $response->getStatus());
@@ -54,6 +63,7 @@ public function testCopyFileToExisting()
     {
         $request = new HTTP\Request('COPY', '/file1', [
             'Destination' => '/file2',
+            'Depth' => 'infinity',
         ]);
         $response = $this->request($request);
         self::assertEquals(204, $response->getStatus());
@@ -64,6 +74,7 @@ public function testCopyFileToExistingOverwriteT()
     {
         $request = new HTTP\Request('COPY', '/file1', [
             'Destination' => '/file2',
+            'Depth' => 'infinity',
             'Overwrite' => 'T',
         ]);
         $response = $this->request($request);
@@ -75,6 +86,7 @@ public function testCopyFileToExistingOverwriteBadValue()
     {
         $request = new HTTP\Request('COPY', '/file1', [
             'Destination' => '/file2',
+            'Depth' => 'infinity',
             'Overwrite' => 'B',
         ]);
         $response = $this->request($request);
@@ -85,6 +97,7 @@ public function testCopyFileNonExistantParent()
     {
         $request = new HTTP\Request('COPY', '/file1', [
             'Destination' => '/notfound/file2',
+            'Depth' => 'infinity',
         ]);
         $response = $this->request($request);
         self::assertEquals(409, $response->getStatus());
@@ -94,6 +107,7 @@ public function testCopyFileToExistingOverwriteF()
     {
         $request = new HTTP\Request('COPY', '/file1', [
             'Destination' => '/file2',
+            'Depth' => 'infinity',
             'Overwrite' => 'F',
         ]);
         $response = $this->request($request);
@@ -110,6 +124,7 @@ public function testCopyFileToExistinBlockedCreateDestination()
         });
         $request = new HTTP\Request('COPY', '/file1', [
             'Destination' => '/file2',
+            'Depth' => 'infinity',
             'Overwrite' => 'T',
         ]);
         $response = $this->request($request);
@@ -122,16 +137,39 @@ public function testCopyColl()
     {
         $request = new HTTP\Request('COPY', '/coll1', [
             'Destination' => '/coll2',
+            'Depth' => 'infinity',
         ]);
         $response = $this->request($request);
         self::assertEquals(201, $response->getStatus());
         self::assertEquals('content3', $this->tree->getChild('coll2')->getChild('file3')->get());
     }
 
+    public function testShallowCopyColl()
+    {
+        // Ensure proppatches are applied
+        $this->tree->failMode = 'updatepropstrue';
+        $request = new HTTP\Request('COPY', '/propscoll', [
+            'Destination' => '/shallow-coll',
+            'Depth' => '0',
+        ]);
+        $response = $this->request($request);
+        // reset
+        $this->tree->failMode = false;
+
+        self::assertEquals(201, $response->getStatus());
+        // The copied collection exists
+        self::assertEquals(true, $this->tree->childExists('shallow-coll'));
+        // But it does not contain children
+        self::assertEquals([], $this->tree->getChild('shallow-coll')->getChildren());
+        // But the properties are preserved
+        self::assertEquals(['my-prop' => 'my-value'], $this->tree->getChild('shallow-coll')->getProperties([]));
+    }
+
     public function testCopyCollToSelf()
     {
         $request = new HTTP\Request('COPY', '/coll1', [
             'Destination' => '/coll1',
+            'Depth' => 'infinity',
         ]);
         $response = $this->request($request);
         self::assertEquals(403, $response->getStatus());
@@ -141,6 +179,7 @@ public function testCopyCollToExisting()
     {
         $request = new HTTP\Request('COPY', '/coll1', [
             'Destination' => '/file2',
+            'Depth' => 'infinity',
         ]);
         $response = $this->request($request);
         self::assertEquals(204, $response->getStatus());
@@ -151,6 +190,7 @@ public function testCopyCollToExistingOverwriteT()
     {
         $request = new HTTP\Request('COPY', '/coll1', [
             'Destination' => '/file2',
+            'Depth' => 'infinity',
             'Overwrite' => 'T',
         ]);
         $response = $this->request($request);
@@ -162,6 +202,7 @@ public function testCopyCollToExistingOverwriteF()
     {
         $request = new HTTP\Request('COPY', '/coll1', [
             'Destination' => '/file2',
+            'Depth' => 'infinity',
             'Overwrite' => 'F',
         ]);
         $response = $this->request($request);
@@ -173,6 +214,7 @@ public function testCopyCollIntoSubtree()
     {
         $request = new HTTP\Request('COPY', '/coll1', [
             'Destination' => '/coll1/subcol',
+            'Depth' => 'infinity',
         ]);
         $response = $this->request($request);
         self::assertEquals(409, $response->getStatus());

tests/Sabre/DAV/Locks/PluginTest.php

@@ -585,6 +585,7 @@ public function testLockCopyLockSource()
 
         $request = new HTTP\Request('COPY', '/dir/child.txt', [
             'Destination' => '/dir/child2.txt',
+            'Depth' => 'infinity',
         ]);
 
         $this->server->httpRequest = $request;
@@ -619,6 +620,7 @@ public function testLockCopyLockDestination()
 
         $request = new HTTP\Request('COPY', '/dir/child.txt', [
             'Destination' => '/dir/child2.txt',
+            'Depth' => 'infinity',
         ]);
         $this->server->httpRequest = $request;
         $this->server->exec();