prevent the root storage from accidentally scanning user folders

while this scan *should* never be triggered, it's good to have some failsafe to ensure
that the users home contents don't end up getting scanned in the root storage

Signed-off-by: Robin Appelman <robin@icewind.nl>

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/private/Files/Cache/LocalRootScanner.php b/lib/private/Files/Cache/LocalRootScanner.php
new file mode 100644
index 00000000000..9ecc8c6611d
--- /dev/null
+++ b/lib/private/Files/Cache/LocalRootScanner.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2020 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 OC\Files\Cache;
+
+class LocalRootScanner extends Scanner {
+	public function scanFile($file, $reuseExisting = 0, $parentId = -1, $cacheData = null, $lock = true, $data = null) {
+		if ($this->shouldScanPath($file)) {
+			return parent::scanFile($file, $reuseExisting, $parentId, $cacheData, $lock, $data);
+		} else {
+			return null;
+		}
+	}
+
+	public function scan($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1, $lock = true) {
+		if ($this->shouldScanPath($path)) {
+			return parent::scan($path, $recursive, $reuse, $lock);
+		} else {
+			return null;
+		}
+	}
+
+	private function shouldScanPath(string $path): bool {
+		$path = trim($path, '/');
+		return $path === '' || strpos($path, 'appdata_') === 0 || strpos($path, '__groupfolders') === 0;
+	}
+}