Steam OpenId support. Closes #596

example/example/settings.py

@@ -144,6 +144,7 @@
     'social_auth.backends.contrib.stocktwits.StocktwitsBackend',
     'social_auth.backends.contrib.behance.BehanceBackend',
     'social_auth.backends.contrib.readability.ReadabilityBackend',
+    'social_auth.backends.steam.SteamBackend',
     'django.contrib.auth.backends.ModelBackend',
 )
 

social_auth/backends/steam.py

@@ -0,0 +1,72 @@
+"""Steam OpenId support"""
+import re
+import urllib
+import urllib2
+
+from django.utils import simplejson
+
+from social_auth.backends import OpenIdAuth, OpenIDBackend, USERNAME
+from social_auth.exceptions import AuthFailed
+from social_auth.utils import setting
+
+
+STEAM_ID = re.compile('steamcommunity.com/openid/id/(.*?)$')
+USER_INFO = 'http://api.steampowered.com/ISteamUser/GetPlayerSummaries/v0002/?'
+
+
+class SteamBackend(OpenIDBackend):
+    """Steam OpenId authentication backend"""
+    name = 'steam'
+
+    def get_user_id(self, details, response):
+        """Return user unique id provided by service"""
+        return self._user_id(response)
+
+    def get_user_details(self, response):
+        user_id = self._user_id(response)
+        url = USER_INFO + urllib.urlencode({'key': setting('STEAM_API_KEY'),
+                                            'steamids': user_id})
+        details = {}
+        try:
+            player = simplejson.load(urllib2.urlopen(url))
+        except (ValueError, IOError):
+            pass
+        else:
+            if len(player['response']['players']) > 0:
+                player = player['response']['players'][0]
+                details = {USERNAME: player.get('personaname'),
+                           'email': '',
+                           'fullname': '',
+                           'first_name': '',
+                           'last_name': '',
+                           'player': player}
+        return details
+
+    def extra_data(self, user, uid, response, details):
+        return details['player']
+
+    def _user_id(self, response):
+        match = STEAM_ID.search(response.identity_url)
+        if match is None:
+            raise AuthFailed(self, 'Missing Steam Id')
+        return match.group(1)
+
+
+class SteamAuth(OpenIdAuth):
+    """Steam OpenId authentication"""
+    AUTH_BACKEND = SteamBackend
+
+    def openid_url(self):
+        """Return Steam OpenId service url"""
+        return 'http://steamcommunity.com/openid'
+
+    @classmethod
+    def enabled(cls):
+        """Steam OpenId is enabled when STEAM_API_KEY is defined"""
+        return setting('STEAM_API_KEY') is not None
+
+
+# Backend definition
+BACKENDS = {
+    'steam': SteamAuth
+}