cant "download" file dont know if its easily possible

[M4rcellxD]

I am using flask response for downloading a file within the normal browser

like this:

response = make_response('test')
response.headers["Cache-Control"] = "must-revalidate"
response.headers["Pragma"] = "must-revalidate"
response.headers["Content-type"] = "application/txt"
response.headers["Content-Disposition"] = "attachment; filename="test"
return response

and nothing happend and i dont know how to fix it.

Have found this but i don't know how to deal with it.

https://doc.qt.io/qt-5/qwebengineprofile.html#downloadRequested
https://code.qt.io/cgit/qt/qtwebengine.git/tree/src/webenginewidgets/api/qwebengineprofile.h#n106