Fix ValueError for some invalid Range requests

fixes #2526
2017-11-23 10:32:13 +01:00 · 2017-11-23 10:32:13 +01:00 · c52e1b7388
commit c52e1b7388
parent f347d3c59e
3 changed files with 30 additions and 2 deletions
--- a/flask/helpers.py
+++ b/flask/helpers.py
@ -591,7 +591,8 @@ def send_file(filename_or_fp, mimetype=None, as_attachment=False,
                rv = rv.make_conditional(request, accept_ranges=True,
                                         complete_length=fsize)
            except RequestedRangeNotSatisfiable:
-                file.close()
+                if file is not None:
+                    file.close()
                raise
        else:
            rv = rv.make_conditional(request)