Added Steam OpenID provider

Author: miedzinski

velruse/providers/steam.py

@@ -0,0 +1,88 @@
+from __future__ import absolute_import
+
+from openid.consumer import consumer
+from openid.extensions import ax
+
+from pyramid.security import NO_PERMISSION_REQUIRED
+
+from ..api import (
+    register_provider,
+    AuthenticationDenied,
+)
+
+from ..exceptions import ThirdPartyFailure
+
+from .openid import (
+    OpenIDAuthenticationComplete,
+    OpenIDConsumer,
+)
+
+
+class SteamAuthenticationComplete(OpenIDAuthenticationComplete):
+    """ Steam auth complete """
+    def __init__(self, claimed_id, provider_name, provider_type):
+        self.claimed_id = claimed_id
+        self.provider_name = provider_name
+        self.provider_type = provider_type
+
+
+class SteamAuthenticationDenied(AuthenticationDenied):
+    """ Steam auth denied """
+
+
+def includeme(config):
+    config.add_directive('add_steam_login', add_steam_login)
+
+
+def add_steam_login(config,
+                    name='steam',
+                    realm=None,
+                    storage=None,
+                    login_path='/login/steam',
+                    callback_path='/login/steam/callback'):
+    """ Add a Steam login provider to the application """
+    provider = SteamConsumer(name, realm, storage)
+
+    config.add_route(provider.login_route, login_path)
+    config.add_view(provider, attr='login', route_name=provider.login_route,
+                    permission=NO_PERMISSION_REQUIRED)
+
+    config.add_route(provider.callback_route, callback_path,
+                     use_global_views=True, factory=provider.callback)
+
+    register_provider(config, name, provider)
+
+
+class SteamConsumer(OpenIDConsumer):
+    def __init__(self, name, realm=None, storage=None):
+        """ Handle Steam auth """
+        super(SteamConsumer, self).__init__(name, 'steam', realm, storage,
+                                            context=SteamAuthenticationComplete)
+
+    def _lookup_identifier(self, request, identifier):
+        """ Return the Steam OpenID directed endpoint """
+        return 'http://steamcommunity.com/openid'
+
+    def callback(self, request):
+        """ Handle incoming redirect from Steam OpenID """
+        openid_session = request.session.pop('velruse.openid_session', None)
+
+        if not openid_session:
+            raise ThirdPartyFailure('No OpenID session has begun')
+
+        # Setup the consumer and parse the information coming back
+        oidconsumer = consumer.Consumer(openid_session, self.openid_store)
+        return_to = request.route_url(self.callback_route)
+        info = oidconsumer.complete(request.params, return_to)
+
+        if info.status in [consumer.FAILURE, consumer.CANCEL]:
+            return SteamAuthenticationDenied('OpenID failure',
+                                             provider_name=self.name,
+                                             provider_type=self.type)
+        elif info.status == consumer.SUCCESS:
+            claimed_id = str(info.identity_url)
+            return SteamAuthenticationComplete(claimed_id=claimed_id,
+                                               provider_name=self.name,
+                                               provider_type=self.type)
+        else:
+            raise ThirdPartyFailure('OpenID failed')