Merge pull request #12907 from owncloud/delete-invalid-external-share

Fix deleting invalid s2s shares

apps/files_sharing/lib/external/storage.php

@@ -167,6 +167,14 @@ class Storage extends DAV implements ISharedStorage {
 		}
 	}
 
+	public function file_exists($path) {
+		if ($path === '') {
+			return true;
+		} else {
+			return parent::file_exists($path);
+		}
+	}
+
 	/**
 	 * check if the configured remote is a valid ownCloud instance
 	 *

lib/private/files/view.php

@@ -280,6 +280,11 @@ class View {
 	}
 
 	public function isDeletable($path) {
+		$absolutePath = $this->getAbsolutePath($path);
+		$mount = Filesystem::getMountManager()->find($absolutePath);
+		if ($mount->getInternalPath($absolutePath) === '') {
+			return $mount instanceof MoveableMount;
+		}
 		return $this->basicOperation('isDeletable', $path);
 	}