在C＃中的多个HTTP请求 [英] Multiple HTTP request in C#

问题描述

我需要并行约200 HTTP请求发送到不同的服务器，并得到回应。 我在C＃中使用HttpWebRequest类。 但我没有看到好的时间增强请求时，并行处理。 例如，如果一个请求需要3秒获得响应，并行2请求 - 6秒，3请求 - 8秒，4请求 - 11sec ... 这是不好的，我希望应该有最好的时间，约10秒200的请求。 它看起来像只有2-3请求执行并行，但超时WebRequest对象创建后立即启动。 我试着设置 DefaultConnectionLimit 和 MaxServicePoints 的值，但ID没有帮助。据我了解这些参数的请求并行一个网站的数量。我需要请求发送到不同的站点。

I need to send about 200 HTTP requests in parallel to different servers and get response. I use HttpWebRequest class in C#. But I don't see good time enhancement when requests are handled in parallel. For example if one request needs 3sec to get response, 2 request in parallel - 6sec, 3 requests - 8 secs, 4 requests - 11sec ... It is not good, I hope that there should be best time, about 10 sec for 200 requests. It looks like only 2-3 requests performs in parallel, but timeout starts immediately after WebRequest object creation. I tried set DefaultConnectionLimit and MaxServicePoints values, but id didn't help. As I understand these parameters for number of requests to one site in parallel. I need requests to different sites.

$ C，我用它来测试$ C例如：

Code example that I use to test:

ArrayList a = new ArrayList(150);

for (i = 50; i < 250; i++ )
{
   a.Add("http://207.242.7." + i.ToString() + "/");
}

for (i = 0; i < a.Count; i++)
{
    Thread t = new Thread(new ParameterizedThreadStart(performRequest));
    t.Start(a[i]);
}


static void performRequest(object ip)
{
      HttpWebRequest req = (HttpWebRequest)WebRequest.Create((stirng)ip);

      HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
}

Сan有人曾经遇到过这样的问题吗？ 感谢您的任何建议。

Сan anyone ever encountered such a problem? Thank you for any suggestions.

推荐答案

而不是启动自己的线程试图使用HttpWebRequest的异步方法，如<一的href="http://msdn.microsoft.com/en-us/library/system.net.httpwebrequest.begingetresponse%28v=VS.100%29.aspx"相对=nofollow> HttpWebRequest.BeginGetResponse 和<一href="http://msdn.microsoft.com/en-us/library/system.net.httpwebrequest.begingetrequeststream%28v=VS.100%29.aspx"相对=nofollow> HttpWebRequest.BeginGetRequestStream 。

Instead of starting up your own threads try using the asynchronous methods of HttpWebRequest such as HttpWebRequest.BeginGetResponse and HttpWebRequest.BeginGetRequestStream.

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