Scala/Spray/Akka unable to leverage mapRequest

Question

I am new to Scala/Spray/AKKA so please excuse this dumb requests. I have the following Directive and it is being called as the first logger line ("inside") is showing up in logs. However, anything inside mapRequest{} is skipped over. The logging line ("headers:") isn't showing up

private def directiveToGetHeaders(input: String) : Directive0 = {
    logger.info("inside")
    mapRequest { request =>
    val headList: List[HttpHeader] = request.headers
        logger.info("headers: " + headList.size)
        request
    }
}

I am not sure what I did wrong. My goal is to pull out all the HTTP headers. Any tip/pointer much appreciated. Thanks

-v

Answer 1

You can use extractRequest directive for getting headers.

private def directiveToGetHeaders(input: String) : Directive0 = {
    logger.info("inside")
    extractRequest { request =>
      val headList: Seq[HttpHeader] = request.headers
      logger.info("headers: " + headList.size)
      complete(HttpResponse())
    }
}