如何使用vertx- HTTP -proxy丰富http请求头

import io.vertx.core.AbstractVerticle;
import io.vertx.core.buffer.Buffer;
import io.vertx.core.http.HttpClient;
import io.vertx.core.http.HttpClientRequest;
import io.vertx.core.http.HttpClientResponse;
import io.vertx.core.http.HttpHeaders;
import io.vertx.core.http.HttpServer;
import io.vertx.core.http.HttpServerRequest;
import io.vertx.core.http.HttpServerResponse;
import io.vertx.core.json.JsonObject;

public class HttpProxyVerticle extends AbstractVerticle {

    private static final int SERVER_PORT = 8080;
    private static final String TARGET_HOST = "example.com";
    private static final int TARGET_PORT = 80;

    private HttpClient httpClient;

    @Override
    public void start() {
        HttpServer server = vertx.createHttpServer();
        server.requestHandler(this::handleRequest);

        httpClient = vertx.createHttpClient();

        server.listen(SERVER_PORT);
    }

    private void handleRequest(HttpServerRequest request) {
        // 获取客户端请求的HTTP头
        JsonObject headers = new JsonObject();
        for (String headerName : request.headers().names()) {
            headers.put(headerName, request.headers().get(headerName));
        }

        // 修改或添加HTTP头信息
        headers.put("User-Agent", "MyCustomUserAgent");

        // 创建向目标服务器发送请求的HttpClientRequest对象
        HttpClientRequest httpClientRequest = httpClient.request(request.method(),
                TARGET_PORT, TARGET_HOST, request.uri());

        // 将修改后的HTTP头信息设置到HttpClientRequest对象中
        httpClientRequest.headers().setAll(headers.getMap());

        // 处理目标服务器响应的回调函数
        httpClientRequest.handler(httpClientResponse -> handleResponse(request.response(), httpClientResponse));

        // 处理客户端请求的回调函数
        request.handler(buffer -> httpClientRequest.write(buffer));
        request.endHandler(v -> httpClientRequest.end());
    }

    private void handleResponse(HttpServerResponse response, HttpClientResponse httpClientResponse) {
        // 将目标服务器响应的HTTP头信息设置到响应对象中
        response.headers().setAll(httpClientResponse.headers());

        // 处理目标服务器响应的数据
        httpClientResponse.handler(buffer -> {
            response.write(buffer);
            response.end();
        });
    }
}