Unable to use Mustache template with Mockserver alternate response

Question

I have a MockServer 5.14.0 (Netty) application running as a Docker container. I'm trying to setup an expectation that based on a given GET request by identifier, if the resource exists, return the dataset available for the same, otherwise a predefined HTTP 404 (Not Found) response.

I would like to use a (Mustache) template for only the body of the HTTP 404 (Not Found) response:

// templates/not-found.response.mustache

{
  "timestamp": "{{ now_iso_8601 }}",
  "status": 404,
  "error": "Not Found",
  "message": null,
  "path": "{{ request.path }}"
}

The problem is that I can't find a way to plug this into the HttpResponse within the callback:

@Override
public HttpResponse handle(final HttpRequest httpRequest) throws Exception {
  final var id = StringUtils.substringAfterLast(new URI(httpRequest.getPath().getValue()).getPath(), "/");
  logger.debug("Retrieving character with identifier [{}]", id);
  final var template = HttpTemplate.template(HttpTemplate.TemplateType.MUSTACHE,
      FileReader.readFileFromClassPathOrPath("templates/not-found.response.mustache"));
  return repository.findById(UUID.fromString(id))
      .map(it -> HttpResponse.response()
          .withBody(JsonBody.json(it))
          .withHeader("content-type", "application/json")
          .withStatusCode(200)
        .orElseGet(() -> HttpResponse.notFoundResponse()
            .withHeader("content-type", "application/json")
            .withBody(template.getTemplate()));
}

Is there a way to achieve what I'm looking for, or should this be repurposed in a different way?

Unable to use Mustache template with Mockserver alternate response

0 Answers0