added configurable logout redirect URL

app/views.py

@@ -387,7 +387,10 @@ def logout():
     session.pop('google_token', None)
     session.clear()
     logout_user()
-    return redirect(url_for('login'))
+    if app.config.get('SAML_LOGOUT_REDIRECT'):
+	return redirect(app.config.get('SAML_LOGOUT_REDIRECT'))
+    else:
+    	return redirect(url_for('login'))
 
 
 @app.route('/dashboard', methods=['GET', 'POST'])

config_template.py

@@ -92,6 +92,8 @@ SAML_METADATA_CACHE_LIFETIME = 1
 SAML_SP_ENTITY_ID = 'http://<SAML SP Entity ID>'
 SAML_SP_CONTACT_NAME = '<contact name>'
 SAML_SP_CONTACT_MAIL = '<contact mail>'
+## uncomment to redirect to the given URL on logout
+# SAML_LOGOUT_REDIRECT = 'https://<idp>/logout'
 
 #Default Auth
 BASIC_ENABLED = True