+ append_content_security_policy_directives(
+ :connect_src => %w(nominatim.openstreetmap.org overpass-api.de router.project-osrm.org valhalla.mapzen.com),
+ :script_src => %w(graphhopper.com open.mapquestapi.com),
+ :img_src => %w(developer.mapquest.com)
+ )
+