使用 Apache HttpComponents HttpClient 测量带宽使用情况

Question

如何测量我的应用程序的 HttpClients 带宽使用情况？ (HttpComponents 4.3)

我有一个使用 HttpClient 与服务器通信的客户端应用程序。 所有请求都是使用池化 http 连接管理器通过同一个客户端完成的。 不幸的是，大多数请求直接使用 httpclient（不是全部），因此在请求位置测量带宽是可行的，但很痛苦。

在客户端的构造函数或连接管理器中是否有一个地方可以简单地注入我自己的带宽监视器（或者它是否已经内置在我没有发现的地方）？

我可以用这个做吗？

    HttpClientBuilder.create().addInterceptorLast(new HttpResponseInterceptor()
    {

        @Override
        public void process(HttpResponse response, HttpContext context) throws HttpException, IOException
        {

        }
    }).build();

Answer 1

自定义HttpRequestExecutor应该是最方便的拦截点

这是一个非常粗略的解决方案，但我希望足以让您入门。

final AtomicLong totalBytes = new AtomicLong();

HttpRequestExecutor requestExecutor = new HttpRequestExecutor() {

    @Override
    protected HttpResponse doSendRequest(
            final HttpRequest request,
            final HttpClientConnection conn,
            final HttpContext context) throws IOException, HttpException {
        HttpResponse response = super.doSendRequest(request, conn, context);
        HttpConnectionMetrics metrics = conn.getMetrics();
        totalBytes.addAndGet(metrics.getSentBytesCount());
        metrics.reset();
        return response;
    }

    @Override
    protected HttpResponse doReceiveResponse(
            final HttpRequest request,
            final HttpClientConnection conn,
            final HttpContext context) throws HttpException, IOException {
        HttpResponse response = super.doReceiveResponse(request, conn, context);
        HttpConnectionMetrics metrics = conn.getMetrics();
        totalBytes.addAndGet(metrics.getReceivedBytesCount());
        metrics.reset();
        return response;
    }
};

CloseableHttpClient httpclient = HttpClients
        .custom()
        .setRequestExecutor(requestExecutor)
        .build();

Answer 2

HttpClient client = HttpClients.createDefault();
HttpGet req = new HttpGet("https://www.google.com/");
HttpClientContext hcc = HttpClientContext.create();
HttpResponse res = client.execute(req, hcc);
HttpConnectionMetrics metrics = hcc.getConnection().getMetrics();
EntityUtils.consumeQuietly(res.getEntity());
LOG.debug("sent: {}, recv: {}, reqcnt: {}, rescnt: {}",
        metrics.getSentBytesCount(), metrics.getReceivedBytesCount(),
        metrics.getRequestCount(), metrics.getResponseCount());

HttpConnectionMetrics 包含您需要的一切。