public HttpProxyServer startProxy(URL realUrl, URL proxyUrl) {
HttpRequestEnrichmentFilter requestFilter = serviceLoader().onlyOne(HttpRequestEnrichmentFilter.class);
HttpRequestEnrichmentService enrichmentService = serviceLoader().onlyOne(HttpRequestEnrichmentService.class);
requestFilter.initialize(enrichmentService);
HttpResponseDeenrichmentFilter responseDeenrichmentFilter = serviceLoader().onlyOne(HttpResponseDeenrichmentFilter.class);
responseDeenrichmentFilter.initialize(serviceLoader().onlyOne(HttpResponseDeenrichmentService.class));
String hostPort = realUrl.getHost() + ":" + realUrl.getPort();