A filter that provides CSRF protection.
These must be by name parameters because the typical use case for instantiating the filter is in Global, which
happens before the application is started. Since the default values for the parameters are loaded from config
and hence depend on a started application, they must be by name.
A csrf configuration object
A token provider to use.
handling failed token error.
Default constructor, useful from Java
in 2.5.0. This constructor uses global state.