-url = ('https://%s/discovery/v1/apis/'
- '{api}/{apiVersion}/rest' % os.environ['ARVADOS_API_HOST'])
+url = ('https://%s:%s/discovery/v1/apis/'
+ '{api}/{apiVersion}/rest' %
+ (os.environ['ARVADOS_API_HOST'],
+ os.environ.get('ARVADOS_API_PORT') or "443"))