Wiremock proxying to different Url like Apache ProxyPass

As far as I know, proxying isn't configurable in this way. Looking at the documentation, WireMock will only proxy the same request via the proxyBaseUrl.

Unfortunately, it looks like your best bet is going to be to write a custom response transformer that does this redirect for you. I don't think the request/response objects given in the transformer class will handle redirection on their own, so you will probably need to set up your own client to forward the requests.

Psuedo code like:

class MyCustomTransformer extends ResponseTransformer {
    public String getName() {
         return "MyCustomTransformer";
    }

    @Override
    public Response transform(Request request, Response response, FileSource files, Parameters parameters) {
        Pattern pattern = Pattern.compile("/regex/url/to/match/");
        Matcher matcher = pattern.matcher(request.getUrl());

        if (matcher.matches()) {
            // Code to modify request and send via your own client
            // For the example, you've saved the returned response as `responseBody`
            return Response.Builder.like(response).but().body(responseBody.toJSONString()).build();
        } else {
            return response
        }
    }

}