GData OAuth in Django

views.py

from django.shortcuts import render_to_response
from django.core.urlresolvers import reverse
from django.http import HttpResponseRedirect
import gdata.gauth
import gdata.contacts.client

CONSUMER_KEY = 'nothx'
CONSUMER_SECRET = 'nothx'
SCOPE = ['https://www.google.com/m8/feeds/']
DOMAIN = 'nothx'

def index(request):
    client = gdata.contacts.client.ContactsClient(source='sandbox')
    
    if 'access_token' in request.session:
        # User is fully authenticated, use stored token and token secret
        access = request.session['access_token']
        client.auth_token = gdata.gauth.OAuthHmacToken(CONSUMER_KEY, CONSUMER_SECRET,
            access.token, access.token_secret, gdata.gauth.ACCESS_TOKEN)
        
        # Get some contacts and render them
        contacts = client.GetContacts().entry
        return render_to_response('index.html', {'contacts': contacts})
    else:
        # User hasn't been authenticated yet, get a request token
        oauth_callback_url = request.build_absolute_uri(reverse('oauth_callback'))
        request_token = client.GetOAuthToken(SCOPE, oauth_callback_url, 
            CONSUMER_KEY, consumer_secret=CONSUMER_SECRET)
        request.session['request_token'] = request_token
        
        # Redirect to Google authorization URL
        return HttpResponseRedirect(
            request_token.generate_authorization_url(google_apps_domain=DOMAIN))
    
def oauth_callback(request):
    # Authorize and upgrade the request token to an access token
    client = gdata.contacts.client.ContactsClient(source='sandbox')
    request_token = gdata.gauth.AuthorizeRequestToken(
        request.session['request_token'], request.build_absolute_uri())
    access_token = client.GetAccessToken(request_token)
    request.session['access_token'] = access_token
    return HttpResponseRedirect(reverse('index'))