Groovy HTTP Post

def doHttpPost(final String path, final String query) {
  final authority = 'example.com'
  final url = new URL("http://${authority}/${path}")
  final connection = url.openConnection()
  connection.with {
    setRequestMethod('POST')
    doOutput = true

    final writer = new OutputStreamWriter(outputStream)
    writer.with {
      write(query)
      flush()
      close()
    }

    connect()

    new JsonSlurper().parseText(content.text)
  }
}