Question

我的程序中有一个名为</img>的方法：

getResponse()

当我在以下代码中从外部方法调用此方法时：

public ClosableHTTPResponse getResponse()
{

        RequestConfig requestConfig = RequestConfig.custom().setConnectTimeout(120 * 1000).build();

        CloseableHttpClient httpClient = null;
        CloseableHttpResponse response = null;


        try {
            httpClient = HttpClientBuilder.create().setDefaultRequestConfig(requestConfig).build();
            HttpGet httpPostRequest = new HttpGet(getURL);
            httpPostRequest.addHeader("Authorization", "Token " + APIKey);
            httpPostRequest.setHeader("Content-type", "application/json");


            response = httpClient.execute(httpPostRequest);
            String statusLine = response.getStatusLine().toString();
            System.out.println("Status Line Response: " + statusLine);

        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (response != null) response.close();
            if (httpClient != null) httpClient.close();
        }


        return response;
    }

}

我遇到public void analzyeReponseA() { CloseableHttpResponse response = null; try { response = getResponse("p1", "p2"); String OKResponse = "HTTP/1.1 200 OK"; String statusLine = response.getStatusLine().toString(); if (statusLine.contains(OKResponse)) { HttpEntity entity = response.getEntity(); // java.net.SocketException: Socket is closed exception thrown on next line.. String responseString = EntityUtils.toString(entity, "UTF-8"); System.out.println("Response String:\n" + responseString); } }异常在这一行：

java.net.SocketException: Socket is closed

基于this和this线程，大概是因为我在String responseString = EntityUtils.toString(entity, "UTF-8");方法中调用if (response != null) response.close();（正确吗？） >

如果是这样，我现在的问题是如何在程序不引发异常的情况下返回getResponse()？在CloseableHttpResponse方法中调用String responseString = EntityUtils.toString(entity, "UTF-8");并返回getReponse()而不是responseString的唯一选择吗？如果我仍然想访问调用者代码中的CloseableHttpResponse对象（例如检查状态行或其他内容）怎么办？

Answer 1

如果我正确理解了这个问题，那么我首先来看一下代码是否真的需要返回HttpResponse。如果所有调用getResponse()的方法只需要例如内容，则返回内容而不是响应。

否则，您应该可以使用try-with-resources方法进行操作：

public void callingMethod() {
  try (CloseableHttpResponse resp = getResponse();) {
  {
      // example
      HttpEntity entity = resp.getEntity();
  }
}

然后从getResponse()方法中删除关闭。

此外，您不想在每次调用时都打开/关闭HttpClient。该类被设计为可以多次使用。 You're Using HttpClient wrong and it is destabilizing your software上有更多信息。因此，您可能希望重构代码以将HttpClient移动到其他位置。

如何返回CloseableHttpResponse？

1 个答案: