{message}
Logout """) async def index(request: web.Request) -> web.Response: username = await authorized_userid(request) if username: template = index_template.format( message='Hello, {username}!'.format(username=username)) else: template = index_template.format(message='You need to login') return web.Response( text=template, content_type='text/html', ) async def login(request: web.Request) -> NoReturn: user_map: Dict[str, User] = request.app['user_map'] invalid_response = web.HTTPUnauthorized(body='Invalid username / password combination') form = await request.post() username = form.get('username') password = form.get('password') if not (isinstance(username, str) and isinstance(password, str)): raise invalid_response verified = await check_credentials(user_map, username, password) if verified: response = web.HTTPFound('/') await remember(request, response, username) raise response raise invalid_response async def logout(request: web.Request) -> web.Response: await check_authorized(request) response = web.Response( text='You have been logged out', content_type='text/html', ) await forget(request, response) return response async def internal_page(request: web.Request) -> web.Response: await check_permission(request, 'public') response = web.Response( text='This page is visible for all registered users', content_type='text/html', ) return response async def protected_page(request: web.Request) -> web.Response: await check_permission(request, 'protected') response = web.Response( text='You are on protected page', content_type='text/html', ) return response def configure_handlers(app: web.Application) -> None: router = app.router router.add_get('/', index, name='index') router.add_post('/login', login, name='login') router.add_get('/logout', logout, name='logout') router.add_get('/public', internal_page, name='public') router.add_get('/protected', protected_page, name='protected')