django-nets-core 0.1.140

A lazy API rest request handler.

TODO: DOCUMENTATION PENDING

• [ ] Add documentation in PSMDOC format

• [ ] Add examples of send email, PUSH NOTIFICATIONS, SMS, etc

• [ ] Add examples of create roles and permissions in multi project support

• [ ] Add examples of request_handler usage to validate permissions, ownership, etc

NETS CORE

And set of lazy API request handlers and common tasks. Just use it if you are really sure that you don’t want to repeat common tasks in request from many sources.

REQUIREMENTS

This package requires the following packages that will be installed automatically:

Django pytz python-dateutil shortuuid django-oauth-toolkit firebase-admin django-cors-headers celery django-celery-beat django-cors-headers django-memcached python-memcached pymemcache channels[‘daphne’]

NOTES:

• For celery to work, you need to set up a broker, for example, RabbitMQ or Redis. see https://docs.celeryq.dev/en/stable/getting-started/backends-and-brokers/index.html and set it in settings.py

• Create a celery.py file in your project folder and set up the celery app see https://docs.celeryproject.org/en/stable/django/first-steps-with-django.html

• For django-celery-beat to work, you need to set up a scheduler, for example, RabbitMQ or Redis. see https://docs.celeryproject.org/en/stable/userguide/periodic-tasks.html#starting-the-scheduler and set it in settings.py

• For firebase to work, you need to set up a firebase project and download the credentials file and set it in settings.py as FIREBASE_CONFIG = os.path.join(BASE_DIR, ‘firebase-credentials.json’) see https://firebase.google.com/docs/admin/setup

• For django-oauth-toolkit to work, you need to set up the authentication backend in settings.py as AUTHENTICATION_BACKENDS = [‘oauth2_provider.backends.OAuth2Backend’] see https://django-oauth-toolkit.readthedocs.io/en/latest/rest-framework/getting_started.html#step-1-configure-your-authentication-backends

• For django-cors-headers to work, you need to set up the middleware in settings.py as MIDDLEWARE = [‘corsheaders.middleware.CorsMiddleware’, ‘django.middleware.common.CommonMiddleware’] see

COMMANDS:

check if settings are set correctly .. code-block:: bash

./manage.py nets-settings

create settings required for nets_core .. code-block:: bash

./manage.py nets-settings –create

force create settings required for nets_core and overwrite existing settings if any .. code-block:: bash

./manage.py nets-settings –create –force

create superuser .. code-block:: bash

./manage.py createsuperuser

INSTALLATION

pip install django-nets-core

Add ‘nets_core’ to your INSTALLED_APPS setting like this:

INSTALLED_APPS = [
    ...
    'oauth2_provider', # required for authentication
    'nets_core',
]

Include the nets_core URLconf in your project urls.py like this:

path("", include("nets_core.auth_urls", namespace="auth")),

USAGE

# this already include csrf_exempt for API requests
from nets_core.decorators import request_handler
from nets_core.params import RequestParam
from django.http import JsonResponse

from .models import MyModel

@request_handler(
    MyModel, # model that you want to use if view requires it, this return 404 if not found and check ownership or permissions test in can_do param
    index_field='id' # field that will be used to get object from model, default is 'id',

    # params list that you want to get from request
    # this will be validated and converted to python types
    # if something is missing or wrong type, error will be raised
    # if public is True, this will be public in API and auth is not required
    # ensure you set you authentication methods in settings include OAuth2
    params=[
        RequestParam('name', str, optional=False),
    ],
    public=False, # default is False
    can_do='myapp.can_delete_object', # this will be check permission to do action, if not passed, only owner of object can do action, if permission does not exists will be created
    perm_required=False, # default is False, this will check if user has permission to do action or is owner of object, if set to TRUE only acces will be granted if can_do is passed

)
def my_view(request):
    # do something
    return JsonResponse({'ok': True})

Cache is required for verification code: check https://docs.djangoproject.com/en/4.1/topics/cache/ and pick your preference cache engine and set it in settings.py.

CACHES = {
    'default': {
    'BACKEND': 'django.core.cache.backends.memcached.PyMemcacheCache',
    'LOCATION': '127.0.0.1:11211'
    }
}

settings VARS:

And set of lazy API request handlers and commong tasks. Just use it if you are really sure that you dont want to repeat common tasks in request from many sources. settings VARS:

@request_handle

include csrf_exempt

Cache is required for verification code: check https://docs.djangoproject.com/en/4.1/topics/cache/ and pick your preference cache engine.

CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.memcached.PyMemcacheCache',
        'LOCATION': '127.0.0.1:11211',
    }
}

NETS_CORE SETTINGS

Enabled multi project support

NETS_CORE_PROJECT_MODEL = 'myapp.MyProjectModel'
NETS_CORE_PROJECT_MEMBER_MODEL = 'myapp.MyProjectMemberModel'

Note that both models should be defined in your settings file. Both require def __str__(self): to be defined. If enabled roles and permissions will be check over project and membership enabled example of models:

from nets_core.models import OwnedModel, NetsCoreBaseModel
# use of OwnedModel is optional, but recommended to include user, created and updated fields,
# if not used, include user, created and updated fields in your model
class MyProjectModel(OwnedModel):
    name = models.CharField(max_length=255)
    enabled = models.BooleanField(default=True)
    description = models.TextField(blank=True, null=True)

    PROTECTED_FIELDS = ['user']
    JSON_DATA_FIELDS=['name', 'description', 'enabled', 'created', 'updated' ] # OPTIONAL, but recommended is extends OwnedModel or NetsCoreBaseModel , fields to include in json data if to_json is called witout fields parameter

    def __str__(self):
        return self.name

MEMBER_ROLES = [
    ('superuser', 'Superuser'),
    ('member', 'Member'),
    ('admin', 'Admin'),
    ('viewer', 'Viewer')
]
class MyProjectMemberModel(OwnedModel):
    project = models.ForeignKey(MyProjectModel, on_delete=models.CASCADE)
    is_superuser = models.BooleanField(default=False)
    enabled = models.BooleanField(default=True)
    role = models.CharField(max_length=255, choices=MEMBER_ROLES, default='member')
    JSON_DATA_FIELDS = ['id', 'is_superuser', 'role', 'user'] # User is a ForeignKey to user model, foreign models to include in json data should extend OwnedModel or NetsCoreBaseModel and include JSON_DATA_FIELDS is required

    PROTECTED_FIELDS = ['is_superuser', 'project']


    def __str__(self):
        return f'{self.user} - {self.project}'


    # example of custom method to convert member to json
    # each model that extends OwnedModel or NetsCoreBaseModel
    # has a to_json method that can be used to convert the model to json
    def member_to_json(self):
        """
        Convert the member object to a JSON representation.

        :return: A dictionary representing the member object in JSON format.
        """
        return {
            'id': self.id,
            'project_id': self.project.id,
            'user_id': self.user.id,
            'role': self.role,
            'user': self.user.to_json(fields=('id', 'first_name', 'last_name')),
        }

Setting is_superuser to True will give user superuser permissions over project, OwnedModel is Abstract model that include user, created and updated fields

Warning

The NetsCoreBaseModel is an abstract model that includes created and updated fields. It implements a to_json method that allows the model to be serialized to JSON. This method accepts fields as a tuple to include or “__all__” to include all fields. This is a stored function in the database for fast access to JSON data.

PROTECTED_FIELDS is a list of fields that will not be exposed, even if the request includes these fields. If PROTECTED_FIELDS is not set, all fields that contain any NETS_CORE_GLOBAL_PROTECTED_FIELDS will be removed from the response. For example, fields such as ‘old_password’, ‘password’, ‘origin_ip’, ‘ip’ will be removed from the response if not set in PROTECTED_FIELDS in your model class. You can set NETS_CORE_GLOBAL_PROTECTED_FIELDS in your settings.py to replace the default fields to be protected.

NetsCoreBaseModel includes updated_fields, which is a JSONField that will store changes in the model. This field will be updated by nets_core when the model is updated. This is useful for tracking changes in the model. Do not make changes to this field, as it will be updated by nets_core.

OwnerModel extends NetsCoreBaseModel and includes a user field. This is useful for tracking the ownership of the model and will be used to check if a user is the owner of the model.

TODO: include examples of use to serialize model to json based on fields required per view or endpoint. Inspired in Facebook GraphQL

set NETS_CORE_GLOBAL_PROTECTED_FIELDS

NETS_CORE_PROTECTED_FIELDS = [
    'password',
    'is_active',
    'enabled',
    'staff',
    'superuser',
    'verified',
    'deleted',
    'token',
    'auth',
    'perms',
    'groups',
    'ip',
    'email',
    'doc',
    'permissions',
    'date_joined',
    'last_login',
    'verified',
    'updated_fields'
] # default fields to be protected

Set verification code expire time

NETS_CORE_VERIFICATION_CODE_EXPIRE_SECONDS = 15*60 # 900 seconds

Set email footer

NETS_CORE_EMAIL_FOOTER_ENABLED = True
NETS_CORE_EMAIL_FOOTER = '<p>Thank you for using our service </p>' # html email footer
NETS_CORE_EMAIL_FOOTER_TEMPLATE = 'myapp/email_foote.html' # template to use for email footer

Warning

If NETS_CORE_EMAIL_FOOTER_TEMPLATE is set, NETS_CORE_EMAIL_FOOTER will be ignored

Set email debug

Enable sent emails while settings.DEBUG is True, default to False. Enable if you want sent emails in development .. code-block:: python

NETS_CORE_EMAIL_DEBUG_ENABLED = True

Set excluded domains

Sometimes you want to exclude some domains from sent emails to avoid spamming, like temporary emails or testing domains like service providers as mailinator.com, temp-mail.org, guerillamail.com, emailondeck.com, ironmail.com, cloakmail.com, 10minutemail.com, 33mail.com, maildrop.cc, etc.

NETS_CORE_EMAIL_EXCLUDE_DOMAINS = ['mailinator.com', 'temp-mail.org', 'guerillamail.com', 'emailondeck.com', 'ironmail.com', 'cloakmail.com', '10minutemail.com', '33mail.com', 'maildrop.cc']

This will avoid to send emails to these domains: example user request access with [e-mail] will not receive any email

Set verification code cache key

Set cache key to store verification code, default is ‘NC_T’ .. code-block:: python

NETS_CORE_VERIFICATION_CODE_CACHE_KEY = ‘NC_T’

Set prohibited fields

Warning

This will be deprecated in future versions, use PROTECTED_FIELDS in your model class to exclude fields from being updated by auth.urls

nets_core.auth_urls provide endpoints to update user model fields, you can exclude some fields from being updated by auth.urls

Set fields that should not be updated by auth.urls

prohibited_fields = [
    "password",
    "is_superuser",
    "is_staff",
    "is_active",
    "verified",
    "email_verified",
    "last_login",
    "date_joined",
    "updated_fields",
    "groups",
    "user_permissions",
    "doc_*",
]
# set this in your settings.py to exclude fields from user model to be updated by auth.urls
NETS_CORE_USER_PROHIBITED_FIELDS = prohibited_fields

Include nets_core.auth_urls

To enabled authentication provided by nets_core include auth.urls in your project urls.py

from django.urls import path, include

urlpatterns = [
    ...
    path("", include("nets_core.auth_urls", namespace="auth")),
    ...
]

Enabled testers for tests or third party verifications

Enabling testers will allow test autentication without receiving email verification code, for this to work you need to set the following settings

NETS_CORE_TESTERS_EMAILS = ['google_testers234*', '[e-mail]']
NETS_CORE_TESTERS_VERIFICATION_CODE = '475638'

NETS_CORE_TESTERS_EMAILS is a list of emails that will be allowed to authenticate without receiving email verification code this could end with * to allow all emails that start with the string before the *, for production use a strong string and different for each project and environment, to avoid unauthorized access

NETS_CORE_TESTERS_VERIFICATION_CODE is the verification code that will be used to authenticate testers

Warning

Use a unique and strong string emails and verification code for each project and environment to avoid unauthorized access

Customize account deletion template

To customize the account deletion email template, create a template in your project templates folder and set the path in settings.py

NETS_CORE_DELETE_ACCOUNT_TEMPLATE = 'myapp/account_deletion.html'

This will include and info template in account deletion view.

Warning

If NETS_CORE_DELETE_ACCOUNT_TEMPLATE is not set not info template will be included in account deletion view

# login url accept device to link verification code to device
 valid_device_fields = [
    "name",
    "os",
    "os_version",
    "device_token",
    "firebase_token",
    "app_version",
    "device_id",
    "device_type",
]

valid_device_fields is use to update or create device if uuid is provided, device will be updated, otherwise created if invalid uuid is provided, error will be raised

DJANGO SETTINGS

DEFAULT_FROM_EMAIL is used for emails

CORS REQUEST AND POST require
CSRF_COOKIE_SAMESITE = 'None'
CSRF_COOKIE_SECURE = True

# firebase credentials
FIREBASE_CONFIG = os.path.join(BASE_DIR, 'firebase-credentials.json')

Dependencies

Django pytz python-dateutil shortuuid django-oauth-toolkit firebase-admin django-cors-headers

Authentication is made with:

django-oauth-toolkit django-cors-headers

Authentication

from nets_core.security import authenticate authenticate(user, code, client_id, client_secret)

Just to be lazy.