Web请求超时处理？ [英] web request timeout handling?

问题描述

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Timeout = 20000;
using (WebResponse response = request.GetResponse())
using (var stream = response.GetResponseStream())
using (var reader = new StreamReader(stream))
{
    var result = reader.ReadToEnd();
    // Do something with result
}

东西在上面的例子中，我有超时定义，如果碰巧击中超时我怎么会知道，结果将是空的？

In the above example I have a timeout defined, if it happens to hit the timeout how would I know, the result would be empty ?

我是否收到任何效应初探类型？

Do I receive any reponse types ?

我怎样才能确保我得到超时？

How can I make sure I got timed out ?

推荐答案

的GetResponse（）将抛出一个 引发WebException 。它的简单测试的究竟的会发生什么，但 - 超时设置为1毫秒，并尝试打什么这需要一段时间才能回来。

GetResponse() would throw a WebException. It's simple to test exactly what happens though - set the timeout to 1ms and try to hit anything which takes a while to come back.

在。事实上，文档状态此明确：

In fact, the documentation states this explicitly:

如果超时期满可以返回的资源面前，引发WebException。

If the timeout period expires before the resource can be returned, a WebException is thrown.

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