django view file for google oauth2

google-oauth2-django-view.py

"""Example Django views file to use Google's oauth2
Prequisites:
1. You have a the Google+ API enabled at console.developers.google.com
2. You have a OAuth 2.0 client ID
3. In the Client ID you have authorized
    - JavaScript origin of http://127.0.0.1:8000
    - Redirect URI of http://127.0.0.1:8000/google_callback
4. You have downloaded OAuth 2.0 client credentials to google_auth_data.json
5. You have a urls that direct requests to googlelogin and to google_callback
6. You have run
    pip install --upgrade google-api-python-client
    pip install httplib2
"""

import httplib2
import oauth2client
from django.http import HttpResponseRedirect, JsonResponse
from apiclient.discovery import build


OAUTH2FLOW_LOGIN = oauth2client.client.flow_from_clientsecrets('google_auth_data.json',  
                               redirect_uri='http://127.0.0.1:8000/google_callback', 
                               scope='email')
GOOGLE_LOGIN_AUTH_URI = OAUTH2FLOW_LOGIN.step1_get_authorize_url()


def googlelogin(request):
    return HttpResponseRedirect(GOOGLE_LOGIN_AUTH_URI)


def get_data_from_google_code(code, flow):
    """
    Args:
      code: authorization code from Google, used to get credentials
      flow(oauth2client.client.flow_from_clientsecrets): Used to obtain actual credentials
    """
    # Credentials allow access to Google assets that are within the flow's scope
    credentials = flow.step2_exchange(code)

    # Apply credential to headers, then make a new, authorized request
    http = credentials.authorize(httplib2.Http())
    google_request = build('plus', 'v1').people().get(userId='me')
    google_oauth2_response = google_request.execute(http)

    # Finally parse out useful data from the response with the authorized headers
    email = google_oauth2_response['emails'][0]['value']
    firstname = google_oauth2_response['name']['givenName']
    lastname = google_oauth2_response['name']['familyName']
    return {'email': email, 'firstname': firstname, 'lastname': lastname}


def google_callback(request):
    '''This url callback is definined in Google API's developer console.
    Args:
      request (HTTP request): an HTTP request that was modified
        by google with authorization code as a GET parameter
    '''
    if 'code' in request.GET:
        data = get_data_from_google_code(request.GET['code'], OAUTH2FLOW_LOGIN)
        JsonResponse(data)
    else:
        JsonResponse({'message': 'an error occured when logging in with your google account'})