Ratpack simple example that serves first json file found in current directory

ratpack.groovy

@Grab('io.ratpack:ratpack-groovy:1.8.0')

import static ratpack.groovy.Groovy.ratpack
import static ratpack.jackson.Jackson.json
import groovy.json.JsonSlurper

def parser = new JsonSlurper()

ratpack {
  handlers {
      get {
          def file = new File('.').listFiles().find { it.name.endsWith('.json') }
          def text = file ? file.text : '{}'
          render json(parser.parseText(text))
      }
      post("event-types") {
        parse(jsonNode())
          .then { n ->  
            println(n.toString())
            render n.toString() 
        }
      }
  }
}