RuntimeError: Request.Response can only be called once per request

[vadim-shadrin]

from japronto import Application

def donotwork(request): access = 1 if isAllow(access,request): return request.Response(text='Hello world!')

def work(request): access = 1

if access == 0:
    return request.Response(headers={'Location': '/notauth'}, code=302)
if access == 1:
    return request.Response(headers={'Location': '/denied'}, code=302)
if access == 2:
    return request.Response(text='Hello world!')

def denied(request): return request.Response(text='denied!')

def allowed(request): return request.Response(text='allowed!')

def notauth(request): return request.Response(text='not auth!')

def isAllow(access,request):

if access == 0:
    return request.Response(headers={'Location': '/notauth'}, code=302)
if access == 1:
    return request.Response(headers={'Location': '/denied'}, code=302)
if access == 2:
    return True

app = Application() app.router.add_route('/donotwork', donotwork) app.router.add_route('/work', work) app.router.add_route('/allowed', allowed) app.router.add_route('/denied', denied) app.router.add_route('/notauth', notauth) app.router.add_route('/work', work) app.run(debug=True)

I try to solve problem of ACL

if I invoke "donotwork" handler I get error

RuntimeError: Request.Response can only be called once per request .**