Reverse routing with next url endpoint

[c-bata]

Summary

Sometimes, we want to set query_parameters when redirecting like:

• http://flask.pocoo.org/docs/0.12/patterns/viewdecorators/

Caution

This option bumped with url variables.

@app.route('/foo/{next}')
def foo(next: str) -> Response:
    return Response('foo')

[c-bata]

Maybe next_url does not conflict with url variables.