module Roda::RodaPlugins::Base::InstanceMethods

rack response to use.
the route block can throw :halt at any point with the
receiver, with the related request. Catch :halt so that
instance_exec the route block in the scope of the

def call(&block)
  catch(:halt) do
    r = @_request
    r.block_result(instance_exec(r, &block))
    @_response.finish
  end
end