Throw StorageNotAvailable if propfind on root failed

If PROPFIND fails with 404 or 405 on the remote share root, it means the
storage is not available. Throw StorageNotAvailable is such case.

1 files changed, 5 insertions, 1 deletions

diff --git a/lib/private/files/storage/dav.php b/lib/private/files/storage/dav.php
index d67e6b9f97e..e02f971b38b 100644
--- a/lib/private/files/storage/dav.php
+++ b/lib/private/files/storage/dav.php
@@ -760,7 +760,11 @@ class DAV extends Common {
 				return $remoteMtime > $time;
 			}
 		} catch (ClientHttpException $e) {
-			if ($e->getHttpStatus() === 404) {
+			if ($e->getHttpStatus() === 404 || $e->getHttpStatus() === 405) {
+				if ($path === '') {
+					// if root is gone it means the storage is not available
+					throw new StorageNotAvailableException(get_class($e).': '.$e->getMessage());
+				}
 				return false;
 			}
 			$this->convertException($e);