osqa/forum_modules/oauthauth/consumer.py

   1 import urllib
   2 import urllib2
   3 import httplib
   4 import time
   5
   6 from forum.authentication.base import AuthenticationConsumer, InvalidAuthentication
   7 from django.utils.translation import ugettext as _
   8
   9 from lib import oauth
  10
  11 class OAuthAbstractAuthConsumer(AuthenticationConsumer):
  12
  13     def __init__(self, consumer_key, consumer_secret, server_url, request_token_url, access_token_url, authorization_url):
  14         self.consumer_secret = consumer_secret
  15         self.consumer_key = consumer_key
  16
  17         self.consumer = oauth.OAuthConsumer(consumer_key, consumer_secret)
  18         self.signature_method = oauth.OAuthSignatureMethod_HMAC_SHA1()
  19
  20         self.server_url = server_url
  21         self.request_token_url = request_token_url
  22         self.access_token_url = access_token_url
  23         self.authorization_url = authorization_url
  24
  25     def prepare_authentication_request(self, request, redirect_to):
  26         request_token = self.fetch_request_token()
  27         request.session['unauthed_token'] = request_token.to_string()
  28         return self.authorize_token_url(request_token)
  29
  30     def process_authentication_request(self, request):
  31         unauthed_token = request.session.get('unauthed_token', None)
  32         if not unauthed_token:
  33              raise InvalidAuthentication(_('Error, the oauth token is not on the server'))
  34
  35         token = oauth.OAuthToken.from_string(unauthed_token)
  36
  37         if token.key != request.GET.get('oauth_token', 'no-token'):
  38             raise InvalidAuthentication(_("Something went wrong! Auth tokens do not match"))
  39
  40         access_token = self.fetch_access_token(token)
  41
  42         return access_token.to_string()
  43
  44     def get_user_data(self, key):
  45         #token = oauth.OAuthToken.from_string(access_token)
  46         return {}
  47
  48     def fetch_request_token(self):
  49         oauth_request = oauth.OAuthRequest.from_consumer_and_token(self.consumer, http_url=self.request_token_url)
  50         oauth_request.sign_request(self.signature_method, self.consumer, None)
  51         params = oauth_request.parameters
  52         data = urllib.urlencode(params)
  53         full_url='%s?%s'%(self.request_token_url, data)
  54         response = urllib2.urlopen(full_url)
  55         return oauth.OAuthToken.from_string(response.read())
  56
  57     def authorize_token_url(self, token, callback_url=None):
  58         oauth_request = oauth.OAuthRequest.from_token_and_callback(token=token,\
  59                         callback=callback_url, http_url=self.authorization_url)
  60         params = oauth_request.parameters
  61         data = urllib.urlencode(params)
  62         full_url='%s?%s'%(self.authorization_url, data)
  63         return full_url
  64
  65     def fetch_access_token(self, token):
  66         oauth_request = oauth.OAuthRequest.from_consumer_and_token(self.consumer, token=token, http_url=self.access_token_url)
  67         oauth_request.sign_request(self.signature_method, self.consumer, token)
  68         params = oauth_request.parameters
  69         data = urllib.urlencode(params)
  70         full_url='%s?%s'%(self.access_token_url, data)
  71         response = urllib2.urlopen(full_url)
  72         return oauth.OAuthToken.from_string(response.read())
  73
  74     def fetch_data(self, token, http_url, parameters=None):
  75         access_token = oauth.OAuthToken.from_string(token)
  76         oauth_request = oauth.OAuthRequest.from_consumer_and_token(
  77             self.consumer, token=access_token, http_method="GET",
  78             http_url=http_url, parameters=parameters,
  79         )
  80         oauth_request.sign_request(self.signature_method, self.consumer, access_token)
  81
  82         url = oauth_request.to_url()
  83         connection = httplib.HTTPSConnection(self.server_url)
  84         connection.request(oauth_request.http_method, url)
  85
  86         return connection.getresponse().read()
  87