Synnefo

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# This is based on the docs at: https://github.com/simplegeo/python-oauth2

import oauth2 as oauth

import urlparse

import uuid

from django.conf import settings

from django.http import HttpResponse

from django.utils import simplejson as json

from django.contrib.auth import authenticate

from astakos.im.target.util import prepare_response

from astakos.im.util import get_or_create_user

# It's probably a good idea to put your consumer's OAuth token and

# OAuth secret into your project's settings. 

consumer = oauth.Consumer(settings.TWITTER_KEY, settings.TWITTER_SECRET)

client = oauth.Client(consumer)

request_token_url = 'http://twitter.com/oauth/request_token'

access_token_url = 'http://twitter.com/oauth/access_token'

# This is the slightly different URL used to authenticate/authorize.

authenticate_url = 'http://twitter.com/oauth/authenticate'

def login(request):

    # Step 1. Get a request token from Twitter.

    resp, content = client.request(request_token_url, "GET")

    if resp['status'] != '200':

        raise Exception("Invalid response from Twitter.")

    request_token = dict(urlparse.parse_qsl(content))

    if request.GET.get('next'):

        request_token['next'] = request.GET['next']

    # Step 2. Store the request token in a session for later use.

    response = HttpResponse()

    response.set_cookie('Twitter-Request-Token', value=json.dumps(request_token), max_age=300)

    # Step 3. Redirect the user to the authentication URL.

    url = "%s?oauth_token=%s" % (authenticate_url, request_token['oauth_token'])

    response['Location'] = url

    response.status_code = 302

    return response

def authenticated(request):

    # Step 1. Use the request token in the session to build a new client.

    data = request.COOKIES.get('Twitter-Request-Token', None)

    if not data:

        raise Exception("Request token cookie not found.")

    request_token = json.loads(data)

    if not hasattr(request_token, '__getitem__'):

        raise BadRequest('Invalid data formating')

    try:

        token = oauth.Token(request_token['oauth_token'],

                            request_token['oauth_token_secret'])

    except:

        raise BadRequest('Invalid request token cookie formatting')

    client = oauth.Client(consumer, token)

    # Step 2. Request the authorized access token from Twitter.

    resp, content = client.request(access_token_url, "GET")

    if resp['status'] != '200':

        raise Exception("Invalid response from Twitter.")

    """

    This is what you'll get back from Twitter. Note that it includes the

    user's user_id and screen_name.

    {

        'oauth_token_secret': 'IcJXPiJh8be3BjDWW50uCY31chyhsMHEhqJVsphC3M',

        'user_id': '120889797', 

        'oauth_token': '120889797-H5zNnM3qE0iFoTTpNEHIz3noL9FKzXiOxwtnyVOD',

        'screen_name': 'heyismysiteup'

    }

    """

    access_token = dict(urlparse.parse_qsl(content))

    # Step 3. Lookup the user or create them if they don't exist.

    # When creating the user I just use their screen_name@twitter.com

    # for their email and the oauth_token_secret for their password.

    # These two things will likely never be used. Alternatively, you 

    # can prompt them for their email here. Either way, the password 

    # should never be used.

    email = '%s@twitter.com' % access_token['screen_name']

    realname = access_token['screen_name']

    username = uuid.uuid4().hex[:30]

    user = get_or_create_user(username, realname=realname, affiliation='Twitter', level=0, email=email)

    # in order to login the user we must call authenticate first

    user = authenticate(email=user.email, auth_token=user.auth_token)

    return prepare_response(request,

                            user,

                            request_token.get('next'))