Apache HttpComponents HttpClient超时

Question

如何在httpcomponent httpclient中设置连接超时？我在：http://hc.apache.org/httpcomponents-client-ga/tutorial/html/connmgmt.html上找到了文档，但不清楚这些参数实际上是如何设置的。

此外，解释一下SO_TIMEOUT和CONNECTION_TIMEOUT之间的区别也会有所帮助。

Answer 1

在Apache Http客户端4.3版中，配置(再次)进行了重构。新的方式看起来像这样：

RequestConfig.Builder requestBuilder = RequestConfig.custom();
requestBuilder.setConnectTimeout(timeout);
requestBuilder.setConnectionRequestTimeout(timeout);

HttpClientBuilder builder = HttpClientBuilder.create();     
builder.setDefaultRequestConfig(requestBuilder.build());
HttpClient client = builder.build();

Answer 2

在HttpClient 4.3版本中，您可以使用以下示例。让我们说5秒钟

int timeout = 5;
RequestConfig config = RequestConfig.custom()
  .setConnectTimeout(timeout * 1000)
  .setConnectionRequestTimeout(timeout * 1000)
  .setSocketTimeout(timeout * 1000).build();
CloseableHttpClient client = 
  HttpClientBuilder.create().setDefaultRequestConfig(config).build();
HttpGet request = new HttpGet("http://localhost:8080/service"); // GET Request
response = client.execute(request);

Answer 3

来自@jontro的答案是正确的，但有一个关于如何做到这一点的代码片段总是很好的。有两种方法可以完成此操作：

版本1:为以下每个参数设置10秒超时：

HttpClient httpclient = new DefaultHttpClient();
// this one causes a timeout if a connection is established but there is 
// no response within 10 seconds
httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 10 * 1000);

// this one causes a timeout if no connection is established within 10 seconds
httpclient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 10 * 1000);

// now do the execute:
HttpGet httpget = new HttpGet(URL);
HttpResponse response = httpclient.execute(httpget);

版本2:还为以下每个参数设置了10秒超时：

HttpParams params = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(params, 10 * 1000);
HttpConnectionParams.setSoTimeout(params, 10 * 1000);

HttpClient httpclient = new DefaultHttpClient(params);
HttpGet httpget = new HttpGet(URL);
HttpResponse response = httpclient.execute(httpget);