.. _aiohttp-security-reference: =========== Reference =========== .. module:: aiohttp_security .. currentmodule:: aiohttp_security .. highlight:: python Public API functions ==================== .. coroutinefunction:: remember(request, response, identity, **kwargs) Remember *identity* in *response*, e.g. by storing a cookie or saving info into session. The action is performed by registered :meth:`AbstractIdentityPolicy.remember`. Usually the *idenity* is stored in user cookies homehow for using by :func:`authorized_userid` and :func:`permits`. :param request: :class:`aiohttp.web.Request` object. :param response: :class:`aiohttp.web.StreamResponse` and descendants like :class:`aiohttp.web.Response`. :param str identity: :class:`aiohttp.web.Request` object. :param kwargs: additional arguments passed to :meth:`AbstractIdentityPolicy.remember`. They are policy-specific and may be used, e.g. for specifiying cookie lifetime. .. coroutinefunction:: forget(request, response) Forget previously remembered :term:`identity`. The action is performed by registered :meth:`AbstractIdentityPolicy.forget`. :param request: :class:`aiohttp.web.Request` object. :param response: :class:`aiohttp.web.StreamResponse` and descendants like :class:`aiohttp.web.Response`. .. coroutinefunction:: authorized_userid(request) Retrieve :term:`userid`. The user should be registered by :func:`remember` before the call. :param request: :class:`aiohttp.web.Request` object. :return: :class:`str` :term:`userid` or ``None`` for session without signed in user. .. coroutinefunction:: permits(request, permission, context=None) Check user's permission. Return ``True`` if user remembered in *request* has specified *permission*. Allowed permissions as well as *context* meaning are depends on :class:`AbstractAuthorizationPolicy` implementation. Actually it's a wrapper around :meth:`AbstractAuthorizationPolicy.permits` coroutine. The user should be registered by :func:`remember` before the call. :param request: :class:`aiohttp.web.Request` object. :param str permission: requested permission. :param context: additional object may be passed into :meth:`AbstractAuthorizationPolicy.permission` coroutine. :return: ``True`` if registered user has requested *permission*, ``False`` otherwise. .. function:: setup(app, identity_policy, autz_policy) Setup :mod:`aiohttp` application with security policies. :param app: aiohttp :class:`aiohttp.web.Application` instance. :param identity_policy: indentification policy, an :class:`AbstractIdentityPolicy` instance. :param autz_policy: authorization policy, an :class:`AbstractAuthorizationPolicy` instance. Abstract policies ================= *aiohttp_security* is built on top of two *abstract policies* -- :class:`AbstractIdentityPolicy` and :class:`AbstractAuthorizationPolicy`. The first one responds on remembering, retrieving and forgetting :term:`identity` into some session storage, e.g. HTTP cookie or authorization token. The second is responsible to return persistent :term:`userid` for session-wide :term:`identity` and check user's permissions. Most likely sofware developer reuses one of pre-implemented *identity policies* from *aiohttp_security* but build *authorization policy* from scratch for every application/project. Identification policy --------------------- .. class:: AbstractIdentityPolicy .. coroutinemethod:: identify(request) Extract :term:`identity` from *request*. Abstract method, should be overriden by descendant. :param request: :class:`aiohttp.web.Request` object. :return: the claimed identity of the user associated request or ``None`` if no identity can be found associated with the request. .. coroutinemethod:: remember(request, response, identity, **kwargs) Remember *identity*. May use *request* for accessing required data and *response* for storing *identity* (e.g. updating HTTP response cookies). *kwargs* may be used by concrete implementation for passing additional data. Abstract method, should be overriden by descendant. :param request: :class:`aiohttp.web.Request` object. :param response: :class:`aiohttp.web.StreamResponse` object or derivative. :param identity: :term:`identity` to store. :param kwargs: optional additional arguments. An individual identity policy and its consumers can decide on the composition and meaning of the parameter. .. coroutinemethod:: forget(request, response) Forget previously stored :term:`identity`. May use *request* for accessing required data and *response* for dropping *identity* (e.g. updating HTTP response cookies). Abstract method, should be overriden by descendant. :param request: :class:`aiohttp.web.Request` object. :param response: :class:`aiohttp.web.StreamResponse` object or derivative. Authorization policy --------------------- .. class:: AbstractAuthorizationPolicy .. coroutinemethod:: authorized_userid(identity) Retrieve authorized user id. Abstract method, should be overriden by descendant. :param identity: an :term:`identity` used for authorization. :return: the :term:`userid` of the user identified by the *identity* or ``None`` if no user exists related to the identity. .. coroutinemethod:: permits(identity, permission, context=None) Check user permissions. Abstract method, should be overriden by descendant. :param identity: an :term:`identity` used for authorization. :param permission: requested permission. The type of parameter is not fixed and depends on implementation.