2017-09-19 08:54:37 +00:00
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from textwrap import dedent
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2020-12-18 17:58:38 +00:00
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from typing import Dict, NoReturn
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2017-09-19 08:54:37 +00:00
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from aiohttp import web
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2018-01-24 10:29:20 +00:00
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from aiohttp_security import (
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remember, forget, authorized_userid,
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2018-09-06 10:06:55 +00:00
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check_permission, check_authorized,
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2018-01-24 10:29:20 +00:00
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)
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2017-09-19 08:54:37 +00:00
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from .authz import check_credentials
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2020-12-18 17:58:38 +00:00
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from .users import User
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2017-09-19 08:54:37 +00:00
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index_template = dedent("""
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<!doctype html>
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2018-01-24 10:29:20 +00:00
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<head></head>
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<body>
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<p>{message}</p>
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<form action="/login" method="post">
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Login:
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<input type="text" name="username">
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Password:
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<input type="password" name="password">
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<input type="submit" value="Login">
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</form>
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<a href="/logout">Logout</a>
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</body>
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""")
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2017-09-19 08:54:37 +00:00
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2020-12-18 17:58:38 +00:00
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async def index(request: web.Request) -> web.Response:
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2017-09-19 08:54:37 +00:00
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username = await authorized_userid(request)
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if username:
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template = index_template.format(
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message='Hello, {username}!'.format(username=username))
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else:
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template = index_template.format(message='You need to login')
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return web.Response(
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text=template,
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content_type='text/html',
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)
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2020-12-18 17:58:38 +00:00
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async def login(request: web.Request) -> NoReturn:
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user_map: Dict[str, User] = request.app['user_map']
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invalid_response = web.HTTPUnauthorized(body='Invalid username / password combination')
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2017-09-19 08:54:37 +00:00
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form = await request.post()
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username = form.get('username')
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password = form.get('password')
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2020-12-18 17:58:38 +00:00
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if not (isinstance(username, str) and isinstance(password, str)):
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raise invalid_response
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verified = await check_credentials(user_map, username, password)
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2017-09-19 08:54:37 +00:00
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if verified:
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2020-12-18 17:58:38 +00:00
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response = web.HTTPFound('/')
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2017-09-19 08:54:37 +00:00
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await remember(request, response, username)
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2020-12-18 17:58:38 +00:00
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raise response
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2017-09-19 08:54:37 +00:00
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2020-12-18 17:58:38 +00:00
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raise invalid_response
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2017-09-19 08:54:37 +00:00
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2020-12-18 17:58:38 +00:00
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async def logout(request: web.Request) -> web.Response:
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2018-09-06 10:06:55 +00:00
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await check_authorized(request)
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2017-09-19 08:54:37 +00:00
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response = web.Response(
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text='You have been logged out',
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content_type='text/html',
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)
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await forget(request, response)
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return response
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2020-12-18 17:58:38 +00:00
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async def internal_page(request: web.Request) -> web.Response:
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2018-09-06 10:06:55 +00:00
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await check_permission(request, 'public')
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2017-09-19 08:54:37 +00:00
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response = web.Response(
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text='This page is visible for all registered users',
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content_type='text/html',
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)
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return response
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2020-12-18 17:58:38 +00:00
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async def protected_page(request: web.Request) -> web.Response:
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2018-09-06 10:06:55 +00:00
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await check_permission(request, 'protected')
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2017-09-19 08:54:37 +00:00
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response = web.Response(
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text='You are on protected page',
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content_type='text/html',
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)
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return response
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2020-12-18 17:58:38 +00:00
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def configure_handlers(app: web.Application) -> None:
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2017-09-19 08:54:37 +00:00
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router = app.router
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router.add_get('/', index, name='index')
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router.add_post('/login', login, name='login')
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router.add_get('/logout', logout, name='logout')
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router.add_get('/public', internal_page, name='public')
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router.add_get('/protected', protected_page, name='protected')
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