sessions: addition of KVSession interface

Signed-off-by: Harris Tzovanakis <me@drjova.com>

Author: drjova

invenio_accounts/config.py

@@ -226,3 +226,7 @@
 
 ACCOUNTS_USERINFO_HEADERS = False
 """If True, add X-Session-ID and X-User-ID to the HTTP response."""
+
+SESSION_INTERFACE_FACTORY = \
+    'invenio_accounts.sessions:KVSessionInterfaceWithAnonymousSessions'
+"""Set the session interface factory for KVSession"""

invenio_accounts/sessions.py

@@ -17,6 +17,8 @@
 from __future__ import absolute_import, print_function
 
 from flask import after_this_request, current_app, request, session
+from flask_kvsession import KVSessionInterface
+from flask_login import current_user
 from geolite2 import geolite2
 from invenio_db import db
 from ua_parser import user_agent_parser
@@ -152,3 +154,14 @@ def default_session_store_factory(app):
             accounts_session_redis_url))
     from simplekv.memory import DictStore
     return DictStore()
+
+
+class KVSessionInterfaceWithAnonymousSessions(KVSessionInterface):
+    """Session interface to avoid storing anonymous sessions."""
+
+    def store_session(self, session):
+        """Store session only when user is authenticated."""
+        if current_user.is_authenticated:
+            super(KVSessionInterfaceWithAnonymousSessions, self).store_session(
+                session
+            )