import asyncio from aiohttp import web from aiohttp_security.abc import (AbstractIdentityPolicy, AbstractAuthorizationPolicy) IDENTITY_KEY = 'aiohttp_security_identity_policy' AUTZ_KEY = 'aiohttp_security_autz_policy' @asyncio.coroutine def remember(request, response, identity, **kwargs): """Remember identity into response. The action is performed by identity_policy.remember() Usually the idenity is stored in user cookies homehow but may be pushed into custom header also. """ assert isinstance(identity, str), identity identity_policy = request.app.get(IDENTITY_KEY) if identity_policy is None: text = ("Security subsystem is not initialized, " "call aiohttp_security.setup(...) first") # in order to see meaningful exception message both: on console # output and rendered page we add same message to *reason* and # *text* arguments. raise web.HTTPInternalServerError(reason=text, text=text) yield from identity_policy.remember(request, response, identity, **kwargs) @asyncio.coroutine def forget(request, response): """Forget previously remembered identity. Usually it clears cookie or server-side storage to forget user session. """ identity_policy = request.app.get(IDENTITY_KEY) if identity_policy is None: text = ("Security subsystem is not initialized, " "call aiohttp_security.setup(...) first") # in order to see meaningful exception message both: on console # output and rendered page we add same message to *reason* and # *text* arguments. raise web.HTTPInternalServerError(reason=text, text=text) yield from identity_policy.forget(request, response) @asyncio.coroutine def authorized_userid(request): identity_policy = request.app.get(IDENTITY_KEY) autz_policy = request.app.get(AUTZ_KEY) if identity_policy is None or autz_policy is None: return None identity = yield from identity_policy.identify(request) user_id = yield from autz_policy.authorized_userid(identity) return user_id @asyncio.coroutine def permits(request, permission, context=None): assert isinstance(permission, str), permission identity_policy = request.app.get(IDENTITY_KEY) autz_policy = request.app.get(AUTZ_KEY) if identity_policy is None or autz_policy is None: return True identity = yield from identity_policy.identify(request) access = yield from autz_policy.permits(identity, permission, context) return access def setup(app, identity_policy, autz_policy): assert isinstance(identity_policy, AbstractIdentityPolicy), identity_policy assert isinstance(autz_policy, AbstractAuthorizationPolicy), autz_policy app[IDENTITY_KEY] = identity_policy app[AUTZ_KEY] = autz_policy