more updates

Former-commit-id: 8c19eda25f60e0fc5587dde8c19a8428befc3e0d

http_utils.go

@@ -1,24 +0,0 @@
-package filemanager
-
-import (
-	"net/http"
-	"os"
-)
-
-// errorToHTTPCode converts errors to HTTP Status Code.
-func errorToHTTPCode(err error, gone bool) int {
-	switch {
-	case os.IsPermission(err):
-		return http.StatusForbidden
-	case os.IsNotExist(err):
-		if !gone {
-			return http.StatusNotFound
-		}
-
-		return http.StatusGone
-	case os.IsExist(err):
-		return http.StatusGone
-	default:
-		return http.StatusInternalServerError
-	}
-}