XL: ListObjects should not list when delimiter and prefix are '/'. (#1777)

fs-v1.go

@@ -338,6 +338,15 @@ func (fs fsObjects) listObjectsFS(bucket, prefix, marker, delimiter string, maxK
 		return ListObjectsInfo{}, nil
 	}
 
+	// For delimiter and prefix as '/' we do not list anything at all
+	// since according to s3 spec we stop at the 'delimiter'
+	// along // with the prefix. On a flat namespace with 'prefix'
+	// as '/' we don't have any entries, since all the keys are
+	// of form 'keyName/...'
+	if delimiter == slashSeparator && prefix == slashSeparator {
+		return ListObjectsInfo{}, nil
+	}
+
 	// Over flowing count - reset to maxObjectList.
 	if maxKeys < 0 || maxKeys > maxObjectList {
 		maxKeys = maxObjectList