OKHTTP:如何测量请求和响应的总字节数？

import okhttp3.Interceptor;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.ResponseBody;

import java.io.IOException;

public class ByteCountInterceptor implements Interceptor {
    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request();
        Response response = chain.proceed(request);

        // 获取请求和响应的字节数
        long requestBytes = request.body().contentLength();
        long responseBytes = response.body().contentLength();

        // 打印请求和响应的字节数
        System.out.println("请求字节数：" + requestBytes);
        System.out.println("响应字节数：" + responseBytes);

        return response;
    }
}

public class Main {
    public static void main(String[] args) {
        OkHttpClient client = new OkHttpClient.Builder()
                .addInterceptor(new ByteCountInterceptor())
                .build();

        // 创建请求
        Request request = new Request.Builder()
                .url("https://example.com")
                .build();

        try {
            // 发送请求
            Response response = client.newCall(request).execute();

            // 处理响应
            ResponseBody responseBody = response.body();
            if (responseBody != null) {
                // 获取响应体的字节数
                long responseBytes = responseBody.contentLength();
                System.out.println("响应体字节数：" + responseBytes);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}