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OAuth 2.0 provider for python with Stateless tokens support

Project description

oauth2-stateless
#############

oauth2-stateless is a framework that aims at making it easy to provide authentication
via `OAuth 2.0 <http://tools.ietf.org/html/rfc6749>`_ within an application stack.
Main difference of this library is the simplicity
and the ability to work without any database just with 'stateless'
tokens based on JWT (JSON Web Tokens).


`Documentation <http://oauth2-stateless.readthedocs.org/en/latest/index.html>`_

Status
******

oauth2-stateless has reached its beta phase. All main parts of the `OAuth 2.0 RFC <http://tools.ietf.org/html/rfc6749>`_ such as the various types of Grants, Refresh Token and Scopes have been implemented.

Installation
************

oauth2-stateless is available on
`PyPI <http://pypi.python.org/pypi/oauth2-stateless/>`_.

pip install oauth2-stateless


Usage
*****

Example Authorization server

.. code-block:: python

from wsgiref.simple_server import make_server
import oauth2
import oauth2.grant
import oauth2.error
from oauth2.store.memory import ClientStore
from oauth2.store.stateless import Token Store
import oauth2.tokengenerator
import oauth2.web.wsgi


# Create a SiteAdapter to interact with the user.
# This can be used to display confirmation dialogs and the like.
class ExampleSiteAdapter(oauth2.web.AuthorizationCodeGrantSiteAdapter, oauth2.web.ImplicitGrantSiteAdapter):
TEMPLATE = '''
<html>
<body>
<p>
<a href="{url}&confirm=confirm">confirm</a>
</p>
<p>
<a href="{url}&deny=deny">deny</a>
</p>
</body>
</html>'''

def authenticate(self, request, environ, scopes, client):
# Check if the user has granted access
if request.post_param("confirm") == "confirm":
return {}

raise oauth2.error.UserNotAuthenticated

def render_auth_page(self, request, response, environ, scopes, client):
url = request.path + "?" + request.query_string
response.body = self.TEMPLATE.format(url=url)
return response

def user_has_denied_access(self, request):
# Check if the user has denied access
if request.post_param("deny") == "deny":
return True
return False

# Create an in-memory storage to store your client apps.
client_store = ClientStore()
# Add a client
client_store.add_client(client_id="abc", client_secret="xyz", redirect_uris=["http://localhost/callback"])

site_adapter = ExampleSiteAdapter()

# Create an in-memory storage to store issued tokens.
# LocalTokenStore can store access and auth tokens
stateless_token = oauth2.tokengenerator.StatelessTokenGenerator(secret_key='xxx')
token_store = TokenStore(stateless)

# Create the controller.
provider = oauth2.Provider(
access_token_store=token_store,
auth_code_store=token_store,
client_store=client_store,
token_generator=stateless_token)
)

# Add Grants you want to support
provider.add_grant(oauth2.grant.AuthorizationCodeGrant(site_adapter=site_adapter))
provider.add_grant(oauth2.grant.ImplicitGrant(site_adapter=site_adapter))

# Add refresh token capability and set expiration time of access tokens to 30 days
provider.add_grant(oauth2.grant.RefreshToken(expires_in=2592000))

# Wrap the controller with the Wsgi adapter
app = oauth2.web.wsgi.Application(provider=provider)

if __name__ == "__main__":
httpd = make_server('', 8080, app)
httpd.serve_forever()


This example only shows how to instantiate the server.
It is not a working example as a client app is missing.
Take a look at the `examples <docs/examples/>`_ directory.

Or just run this example:
python docs/examples/stateless_client_server.py

This is already a workable example. They can work without database
because oauth token already contain all the necessary information like
a user_id, grant_type, data, scopes and client_id.
If you want to check user state like a ban, disable, etc.
You can check this param on server site from database. By adding this check to
/api/me or redefine oauth2.tokengenerator and add specific logic.


Supported storage backends
**************************

oauth2-stateless does not force you to use a specific database or you
can work without database with stateless token.

It currently supports these storage backends out-of-the-box:

- MongoDB
- MySQL
- Redis
- Memcached
- Dynamodb

However, you are not not bound to these implementations.
By adhering to the interface defined by the base classes in ``oauth2.store``,
you can easily add an implementation of your backend.
It also is possible to mix different backends and e.g. read data of a client
from MongoDB while saving all tokens in memcached for fast access.

Take a look at the examples in the *examples* directory of the project.


Site adapter
************

- tornado
- flask
- uwsgi

Like for storage, oauth2-stateless does not define how you identify a
user or show a confirmation dialogue.
Instead your application should use the API defined by ``oauth2.web.SiteAdapter``.

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