public static void main(String[] args) throws Exception {

System.setProperty("jdk.httpclient.HttpClient.log","all");

InetAddress loopback = InetAddress.getLoopbackAddress();

InetSocketAddress addr = new InetSocketAddress (loopback, 0);

SSLContext sslContext = new SimpleSSLContext().get();

var server1 = HttpsServer.create(addr,100);

server1.setHttpsConfigurator(new HttpsConfigurator(sslContext));

var proxy = HttpServer.create(addr,100);

var ctx = proxy.createContext("/", new ProxyHandler());

server1.createContext("/test", (HttpExchange exchange) -> {

System.out.println("request headers: "+exchange.getRequestHeaders());

exchange.sendResponseHeaders(200,0);

if(exchange.getRequestMethod().equals("POST")) {

exchange.getRequestBody().transferTo(exchange.getResponseBody());

exchange.getResponseBody().close();

} else {

try (var os = exchange.getResponseBody()) {

os.write("hello".getBytes());

}

}

});

proxy.start();

server1.start();

try {

var client = HttpClient.newBuilder()

.proxy(ProxySelector.of(new InetSocketAddress(proxy.getAddress().getHostName(),proxy.getAddress().getPort())))

.sslContext(sslContext )

.build();

try(client) {

var uri = URIBuilder.newBuilder().scheme("https").host(server1.getAddress().getHostName()).port(server1.getAddress().getPort()).path("/test").build();

var response = client.send(HttpRequest.newBuilder(uri).build(),HttpResponse.BodyHandlers.ofString());

if(!response.body().equals("hello")) throw new IllegalStateException("incorrect body "+response.body());

// response = client.send(HttpRequest.newBuilder(uri).POST(HttpRequest.BodyPublishers.ofString("senditback")).build(),HttpResponse.BodyHandlers.ofString());

// if(!response.body().equals("senditback")) throw new IllegalStateException("incorrect body "+response.body());

}

} finally {

server1.stop(0);

proxy.stop(0);

}

}

}