django-ai-kit-auth

django-ai-kit-auth

django-ai-kit-auth bundles everything authentication related and is meant to work seamlessly with the ai-kit-auth react component.

It provides routes for login, password validation, password reset, registration and account verification.

It also handles email notifications on registration and password reset. Look at the template section of the settings to configure the email templates.

It works with the standard django and with a custom user model as long as its provides an email address.

Standard Django sessions are used for authentification.

Index

• Quick Start_

• Api Documentation_

  • Login_
  • Logout_
  • Me_
  • Registration_
  • Initiate Password Reset_
  • Password Reset_
  • Validate Password_
  • Activate User_

• Error Codes_

• Signals_

Quick Start

1.) Add ai_kit_auth to your INSTALLED_APPS like so:

::

INSTALLED_APPS = (
    # ...
    "rest_framework",
    # ...
    "ai_kit_auth",
    # ...
    "corsheaders",
)

rest_framework from the pip package djangorestframework and corsheaders from the pip package django-cors-headers are dependencies and must be installed.

The cors headers middleware has to be put into the middleware configuration like so:

::

MIDDLEWARE = (
    "corsheaders.middleware.CorsMiddleware",
    # ...
)

This middleware has to be put as high as possible in the middlware list.

For more details see the django-cors-headers <https://github.com/adamchainz/django-cors-headers>__ documentation.

2.) Configuration is namespaced unter AI_KIT_AUTH like so:

::

AI_KIT_AUTH = {
    "FRONTEND": {
        "URL": "example.com",
    },
    # ...
}

Note that FRONTEND.URL is a required configuration that does not have a default. Default configurations are:

::

AI_KIT_AUTH = {
    # You can disable any or all of the endpoints created by ai-kit-auth
    # by setting the respective entry in this section to False.
    "ENABLE_ENDPOINTS": {
        "LOGIN": True,
        # Route to activate an email address after registration
        "ACTIVATE_EMAIL": True,
        "LOGOUT": True,
        # Endpoint which checks whether the client making the request is
        # logged in, and if so returns user information
        "ME": True,
        # endpoint to check whether the backend will accept a certain password
        "VALIDATE_PASSWORD": True,
        # Calling this endpoint triggers an email for password recovery to be sent
        "SEND_PW_RESET_MAIL": True,
        # endpoint for actually changing the password
        "RESET_PASSWORD": True,
        # registers a new user
        "REGISTER": True,
    },
    # Templates for all the email notifications to the user
    "EMAIL_TEMPLATES": {
        # Here you can supply a function taking no arguments and returning
        # a dictionary with entries, that you would like to pass to the
        # email template in case you want to provide your own.
        # By default it points to a function that returns an empty dictionary.
        "CUSTOM_DATA_FUNCTION": "ai_kit_auth.services.custom_email_data",
        # is send when the user is created by registration
        "USER_CREATED": {
            "TITLE": "ai_kit_auth/user_created_title.txt",
            "BODY_PLAINTEXT": "ai_kit_auth/user_created_body.txt",
            "BODY_HTML": "ai_kit_auth/user_created_body.html",
        },
        # is send to the user after they triggered the forget password
        # feature. Contains the time limited password reset link
        "RESET_PASSWORD": {
            "TITLE": "ai_kit_auth/reset_password_title.txt",
            "BODY_PLAINTEXT": "ai_kit_auth/reset_password_body.txt",
            "BODY_HTML": "ai_kit_auth/reset_password_body.html",
        },
    },
    # If you need complete control over how the activation email is sent,
    # override this setting with your own function. Ai-kit-auth will pass
    # two arguments: a user object and url as a string, which points to the
    # frontend page which needs to be visited in order to activate the account
    "SEND_USER_ACTIVATION_MAIL": "ai_kit_auth.services.default_send_user_activation_mail",
    # If you need complete control over how the activation email is sent,
    # override this setting with your own function. Ai-kit-auth will pass
    # two arguments: a user object and url as a string, which points to the
    # frontend page which needs to be visited in order to activate the account
    "SEND_ACTIVATION_BY_ADMIN_MAIL": "ai_kit_auth.services.default_send_activation_by_admin_mail",
    # If you need complete control over how the password reset email is sent,
    # override this setting with your own function. Ai-kit-auth will pass
    # two arguments: a user object and url as a string, which points to the
    # frontend page which needs to be visited in order to reset the password
    "SEND_RESET_PW_MAIL": "ai_kit_auth.services.default_send_reset_pw_mail",
    # Set this to False to prevent ai-kit-auth to register its own admin forms
    # with django admin. It will then use the default admin forms from
    # django.contrib.auth.admin or your own forms.
    "USE_AI_KIT_AUTH_ADMIN": True,
    # If you want to configure the layout of the admin form or you use a
    # use model doesn't have all the fields you need, you can supply your
    # own fieldsets.
    "ADMIN_FIELDSETS": (
        (None, {"fields": ("username", "email", "password")}),
        (_("Personal info"), {"fields": ("first_name", "last_name")}),
        (
            _("Permissions"),
            {
                "fields": (
                    "is_active",
                    "is_staff",
                    "is_superuser",
                    "groups",
                    "user_permissions",
                ),
            },
        ),
        (_("Important dates"), {"fields": ("last_login", "date_joined")}),
    ),
    "ADMIN_ADD_FIELDSETS": (
        (
            None,
            {
                "classes": ("wide",),
                "fields": ("username", "email", "password1", "password2"),
            },
        ),
    ),
    # If true, the user has to specify a username in addition to the
    # mail address
    "USERNAME_REQUIRED": False,
    # A serializer which is used by the ai-kit-auth endpoints for
    # sending user information to the frontend. Override it if you need
    # additional information about a user in the frontend, like e.g. avatar
    # image, user role etc.
    # The default USER_SERIALIZER contains id, email and username.
    "USER_SERIALIZER": "ai_kit_auth.serializers.UserSerializer",
    # A serializer which is used by the registration endpoint. Override if
    # you need additional information about the user directly in the
    # registration. The default serializer sets username, password and email
    "REGISTRATION_SERIALIZER": "ai_kit_auth.serializers.RegistrationSerializer",
    # The user model fields which are used to identify a user.
    # They are iterated over in the given order to find a user from the "ident" parameter
    # provided to the views.
    "USER_IDENTITY_FIELDS": ("email", "username"),
    # information about the frontend, mostly the used routes. In most cases
    # the defaults are fine, but can be changed for localisation of the
    # urls.
    # Only the actual frontend url is unset and you will get an
    # configuration error if you don't specify it.
    "FRONTEND": {
        "URL": "",
        "ACTIVATION_ROUTE": "/auth/activation/",
        "RESET_PW_ROUTE": "/auth/reset_password/",
    },
}

In addition to that some general configuration is required:

::

CORS_ORIGIN_WHITELIST = [
    "http://localhost:8000",
    "http://localhost:3000",
    # add other front-end backend urls
]

CORS_ALLOW_CREDENTIALS = True

CSRF_USE_SESSIONS = True

CSRF_TRUSTED_ORIGINS = [
    "http://localhost:8000",
    "http://localhost:3000",
    # add other front-end backend urls
]

The CSRF_USE_SESSIONS configuration doesn't need to be set to enable Ai-Kit-Auth, but in prevents problems with double logins, for example if a user is logged into the Admin interface and also logged in the frontend. Django saves CSRF tokens in cookies by default.

Please note that CORS_ORIGIN_WHITELIST takes the whole URL including the scheme (e.g. 'http://'), whereas CSRF_TRUSTED_ORIGINS takes only the domain, for example: "example.org".

3.) Include the routes in your urls.py:

::

urlpatterns = [
    # ...
    path("api/v1/auth/", include("ai_kit_auth.urls"))
    # ...
]

4.) Run python manage.py migrate. Only required if you add the dependencies to your project since this package does not define models on its own.

Api Documentation

Of course you don't have to use the front and backend components in tandem. But if you start to mix and match, you have to speak to the Rest-API directly.

To do that, here are the endpoints:

Login

POST ../login/

visibility: everyone

expects

::

{
    ident: <username or email>,
    password: <the password>
}

both fields are required. In addition a csrf-token returned from the /me call is needed in the request header as X-CSRFTOKEN. The endpoint answers with the status code 200 and

::

{
    user: {
        username: <the username>,
        email: <the email address>,
        id: <the internal id>,
    },
    csrf: <csrf token>
}

Error cases:

Field specific errors are given back like so:

::

{
    <field name>: <error code>
}

fields are ident or password and the only possible error code is blank.

Errors that are not field specific are mapped to the key non_field_errors. Currently, the only error code that can be returned here is invalid_credentials.

Logout

POST ../logout/

visibility: authenticated users

expects

::

{}

and answers with status code 200 and

::

{
    csrf: <csrf token>
}

At least when the csrf token is stored via session storage, it changes at logout and you have to update it in the frontend.

Me

GET ../me/

visibility: everyone

The answer is very similar to login: status code 200 and

::

{
    user: null | {
        username: <the username>,
        email: <the email address>,
        id: <the internal id>,
    },
    csrf: <csrf token>
}

The only difference is that me is reachable for anonymous users that are not (yet) logged in. In that case, the user property is set to null.

Registration

POST register

visibility: everyone

expects

::

{
    "username": <username, only if the USERNAME_REQUIRED option is set>,
    "email": <email>,
    "password": <password>,
}

and answers with status code 201 and

::

{}

or errors out with status code 400 because fields is missing or the password validation fails.

Initiate Password Reset

POST send_pw_reset_email

visibility: everyone

expects

::

{
    "email": <email>,
}

and answers with status code 200

::

{}

This endpoint never gives back errors to not give out unnecessary information.

Password Reset

POST reset_password

visibility: everyone

expects

::

{
    "ident": <identifer for the user, from the reset link>,
    "token": <reset token, from the reset link>,
    "password": <password>,
}

and answers with status code 200 and

::

{}

On error, status code 400 is given back and the errors can be missing fields, reset_password_link_invalid for invalid identifiers or token or the standard invalid password errors.

Validate Password

POST validate_password

visibility: everyone

expects

::

{
    "ident": <identifier>,
    "username": <username>,
    "email": <email>,
    "password": <password>,
}

you have to supply either ident or both username and email if USERNAME_REQUIRED is configured. Otherwise you have to supply either ident or email.

and answers with status code 200 and

::

{}

if the password respects all the configured password validators or it errors out on status code 400 and gives back the respective error code to indicate what rule was violated.

Activate User

POST activate_email

expects

::

{
    "ident": <identifer for the user, from the reset link>,
    "token": <reset token, from the reset link>,
}

and answers with status code 200 and

::

{}

or errors out on status code 400 with the activation_link_invalid error code.

Error Codes

The backend never sends user facing error messages, but general error codes. Internationalisation happens in the frontend.

+-------------------------------+-------------------------------------------------------+ | error code | possible user facing message | +===============================+=======================================================+ | blank | This field may not be blank. | +-------------------------------+-------------------------------------------------------+ | username_unique | This username has already been taken. | +-------------------------------+-------------------------------------------------------+ | password_too_short | Password too short, it should contain at least 8 | | | characters. | +-------------------------------+-------------------------------------------------------+ | password_too_similar | Password too similar to your username or email | | | address. | +-------------------------------+-------------------------------------------------------+ | password_too_common | The password you've entered is too common and | | | thus unsafe. Please try to think of something | | | else. | +-------------------------------+-------------------------------------------------------+ | passwords_not_identical | Both passwords entered are not identical. | +-------------------------------+-------------------------------------------------------+ | invalid_credentials | The combination of username (or email, depending | | | on configuration) and password is invalid. Please | | | try again. | +-------------------------------+-------------------------------------------------------+ | activation_link_invalid | The activation link you tried to use is invalid. | | | This may be due to a typo, or because it has | | | been used already. | +-------------------------------+-------------------------------------------------------+ | password_reset_link_invalid | The password reset link you tried to use is invalid. | | | This may be due to a typo, or because it has | | | been used already. | +-------------------------------+-------------------------------------------------------+

Another reason for getting password_reset_link_invalid might be that you are logged in into the django admin view with the same user you are trying to reset the password for.

Signals

You can use the Signals AI-Kit Authentication emits when states are changed. The following Signals are available:

• user_pre_login is emitted before a login request is handled
• user_post_login is emitted after a login request is handled
• user_pre_logout is emitted before a logout request is handled
• user_post_logout is emitted after a logout request is handled
• user_pre_registered is emitted before a request to register is handled
• user_post_registered is emitted after a request to register is handled
• user_pre_activated is emitted before a request to activate a user is handled
• user_post_activated is emitted after a request to activate a user is handled
• user_pre_forgot_password is emitted before a forgot_password request is handled
• user_post_forgot_password is emitted after a forgot_password request is handled
• user_pre_reset_password is emitted before a reset_password request is handled
• user_post_reset_password is emitted after a reset_password request is handled