96 lines
2.9 KiB
Python
96 lines
2.9 KiB
Python
import asyncio
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import functools
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from aiohttp import web
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from aiohttp_security import remember, forget, authorized_userid, permits
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from .db_auth import check_credentials
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def require(permission):
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def wrapper(f):
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@asyncio.coroutine
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@functools.wraps(f)
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def wrapped(self, request):
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has_perm = yield from permits(request, permission)
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if not has_perm:
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message = 'User has no permission {}'.format(permission)
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raise web.HTTPForbidden(body=message.encode())
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return (yield from f(self, request))
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return wrapped
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return wrapper
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class Web(object):
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index_template = """
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<!doctype html>
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<head>
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</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="login">
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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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@asyncio.coroutine
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def index(self, request):
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username = yield from authorized_userid(request)
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if username:
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template = self.index_template.format(
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message='Hello, {username}!'.format(username=username))
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else:
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template = self.index_template.format(message='You need to login')
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response = web.Response(body=template.encode())
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return response
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@asyncio.coroutine
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def login(self, request):
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response = web.HTTPFound('/')
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form = yield from request.post()
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login = form.get('login')
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password = form.get('password')
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db_engine = request.app.db_engine
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if (yield from check_credentials(db_engine, login, password)):
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yield from remember(request, response, login)
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return response
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return web.HTTPUnauthorized(
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body=b'Invalid username/password combination')
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@require('public')
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@asyncio.coroutine
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def logout(self, request):
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response = web.Response(body=b'You have been logged out')
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yield from forget(request, response)
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return response
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@require('public')
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@asyncio.coroutine
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def internal_page(self, request):
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response = web.Response(
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body=b'This page is visible for all registered users')
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return response
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@require('protected')
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@asyncio.coroutine
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def protected_page(self, request):
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response = web.Response(body=b'You are on protected page')
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return response
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def configure(self, app):
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router = app.router
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router.add_route('GET', '/', self.index, name='index')
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router.add_route('POST', '/login', self.login, name='login')
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router.add_route('GET', '/logout', self.logout, name='logout')
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router.add_route('GET', '/public', self.internal_page, name='public')
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router.add_route('GET', '/protected', self.protected_page,
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name='protected')
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