return -1 if file is empty otherwise we run into infinite loops

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/files/cache/cache.php b/lib/files/cache/cache.php
index 76e1ee97727..bd2f774190d 100644
--- a/lib/files/cache/cache.php
+++ b/lib/files/cache/cache.php
@@ -287,6 +287,10 @@ class Cache {
 	 * @return int
 	 */
 	public function getId($file) {
+		// if no file is given return -1
+		if ($file === '') {
+			return -1;
+		}
 		// normalize path
 		$file = $this->normalize($file);
 
@@ -518,7 +522,7 @@ class Cache {
 				if ($entry['size'] !== $totalSize) {
 					$this->update($id, array('size' => $totalSize));
 				}
-				
+
 			}
 		}
 		return $totalSize;