First version of OSM Oauth backend

umap/osm_backend.py

@@ -0,0 +1,64 @@
+"""
+OSM OAuth support.
+
+This adds support for OSM OAuth service. An application must
+be registered first on OSM and the settings OSM_CONSUMER_KEY
+and OSM_CONSUMER_SECRET must be defined with the corresponding
+values.
+
+More info: http://wiki.openstreetmap.org/wiki/OAuth
+"""
+from xml.dom import minidom
+from social_auth.backends import ConsumerBasedOAuth, OAuthBackend, USERNAME
+
+# OSM configuration
+OSM_SERVER = 'http://www.openstreetmap.org/oauth'
+OSM_REQUEST_TOKEN_URL = '%s/request_token' % OSM_SERVER
+OSM_ACCESS_TOKEN_URL = '%s/access_token' % OSM_SERVER
+OSM_AUTHORIZATION_URL = '%s/authorize' % OSM_SERVER
+OSM_USER_DATA_URL = 'http://api.openstreetmap.org/api/0.6/user/details'
+
+
+class OSMBackend(OAuthBackend):
+    """OSM OAuth authentication backend"""
+    name = 'openstreetmap'
+    EXTRA_DATA = [
+        ('username', 'username'),
+    ]
+
+    def get_user_details(self, response):
+        """Return user details from OSM account"""
+        return {USERNAME: response.get('username')}
+
+    def get_user_id(self, details, response):
+        """Return the user id, both email and username can change in OSM."""
+        return response['id']
+
+
+class OSMAuth(ConsumerBasedOAuth):
+    """OSM OAuth authentication mechanism"""
+    AUTHORIZATION_URL = OSM_AUTHORIZATION_URL
+    REQUEST_TOKEN_URL = OSM_REQUEST_TOKEN_URL
+    ACCESS_TOKEN_URL = OSM_ACCESS_TOKEN_URL
+    AUTH_BACKEND = OSMBackend
+    SETTINGS_KEY_NAME = 'OSM_CONSUMER_KEY'
+    SETTINGS_SECRET_NAME = 'OSM_CONSUMER_SECRET'
+
+    def user_data(self, access_token):
+        """Return user data provided"""
+        url = OSM_USER_DATA_URL
+        request = self.oauth_request(access_token, url)
+        response = self.fetch_response(request)
+        doc = minidom.parseString(response)
+        user_node = doc.getElementsByTagName('user')[0]
+        username = user_node.getAttribute('display_name')
+        user_id = user_node.getAttribute('id')
+        return {
+            "username": username,
+            "id": user_id
+        }
+
+# Backend definition
+BACKENDS = {
+    'openstreetmap': OSMAuth,
+}

umap/static/umap/umap.css

@@ -116,3 +116,6 @@ input:-moz-placeholder, :-moz-placeholder {
 .login-grid .login-twitter {
     background-image: url("./twitter.png");
 }
+.login-grid .login-openstreetmap {
+    background-image: url("./openstreetmap.png");
+}