Main方法创建两个创建HttpWebRequests的线程.如果用户希望,他们可以通过单击按钮然后调用Abort方法来中止请求.

private Thread first;
private Thread second;
private string uri = "http://somewhere";
 
public void Main()
{
  first = new Thread(GetFirst);
  first.Start();
 
  second = new Thread(GetSecond);
  second.Start();
 
  // Some block on threads... like the Countdown class
  countdown.Wait();
}
 
public void Abort()
{
  try
  {
    first.Abort();
  }
  catch { // do nothing }
 
  try
  {
    second.Abort();
  }
  catch { // do nothing }
}
 
private void GetFirst(object state)
{
  MyHandler h = new MyHandler(uri);
  h.RunRequest();
}
 
private void GetSecond(object state)
{
  MyHandler h = new MyHandler(uri);
  h.RunRequest();
}

第一个线程被SocketException中断：

A blocking operation was interrupted by a call to WSACancelBlockingCall

第二个线程挂起在GetResponse()上.

如何以Web服务器知道连接已中止的方式中止这两个请求？和/或,是否有更好的方法来执行此操作？

UPDATE

正如所建议的,一个很好的选择是使用BeginGetResponse.但是,我无法访问HttpWebRequest对象 – 它在MyHandler类中被抽象化.我修改了这个问题来证明这一点.

public class MyHandler
{
  public void RunRequest(string uri)
  {
    HttpWebRequest req = HttpWebRequest.Create(uri);
    HttpWebResponse res = req.GetResponse();
  }
}