Java HTTP 客户端请求设置超时

Question

我想设置请求的超时时间。这是代码，到目前为止我已经得到了。

final HttpClient httpclient = HttpClients.createDefault();
final HttpPost httppost = new HttpPost(address);
httppost.setHeader("Accept", "text/xml");
httppost.setHeader("Content-type", "application/xml; charset=UTF-8");
httppost.setEntity(new StringEntity(body));
final HttpResponse response = httpclient.execute(httppost);
final HttpEntity entity = response.getEntity();

我已经试过了(不起作用，一直加载并忽略超时)

// set the connection timeout value to 30 seconds (30000 milliseconds)
final HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 30000);
client = new DefaultHttpClient(httpParams);

和(这个抛出 java.lang.UnsupportedOperationException)

httpclient = HttpClients.createDefault();
httpclient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 3000);
httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 6000);

还有其他方法可以设置超时吗？我真的不需要响应，所以异步请求之类的东西也可以完成这项工作。

Answer 1

Apache 的 HttpClient 有两个独立的超时:一个是等待建立 TCP 连接的超时时间，另一个是等待后续字节数据的超时时间。

HttpConnectionParams.setConnectionTimeout()用于建立 TCP 连接，而 HttpConnectionParams.setSoTimeout()在等待后续数据字节时使用。

// Creating default HttpClient
HttpClient httpClient = new DefaultHttpClient();
final HttpParams httpParams = httpClient.getParams();

// Setting timeouts
HttpConnectionParams.setConnectionTimeout(httpParams, 5000);
HttpConnectionParams.setSoTimeout(httpParams, 30000);

// Rest of your code
final HttpPost httppost = new HttpPost(address);
httppost.setHeader("Accept", "text/xml");
httppost.setHeader("Content-type", "application/xml; charset=UTF-8");
httppost.setEntity(new StringEntity(body));
final HttpResponse response = httpclient.execute(httppost);
final HttpEntity entity = response.getEntity();