working commit

app/storage/storage.go

@@ -78,7 +78,7 @@ func (store *Storage) WriteTempFile(source io.Reader) (string, int64, string, er
 	var size int64
 	var csum string
 
-	tmpName := fmt.Sprintf("%d.tmp", auxuuid.NewUUID())
+	tmpName := fmt.Sprintf("%s.tmp", auxuuid.NewUUID())
 	tmpPath := store.makeTmppath(tmpName)
 
 	tmpdirpath := store.makeTmpsubdir()
@@ -120,7 +120,7 @@ func (store *Storage) HardlinkFile(tmpName, collection, filename string) error {
 	}
 	filename = store.makeFilepath(collection, filename)
 	_, err = os.Stat(dirname)
-	if os.IsExist(err) {
+	if err == nil {
 		os.Remove(filename) // TODO: safe removing
 	}
 	tmpName = store.makeTmppath(tmpName)