彗星是在ASP.NET中更容易使用异步页？ [英] Is Comet easier in ASP.NET with Asynchronous Pages?

问题描述

我的意思不是要问，的是ASPNET比码头彗星更容易？的我的意思是，是彗星容易客栈要么ASPNET或Jetty，相对于其他的选择吗？我想ASP.NET和Jetty的非同步功能，特别是使彗星更具可扩展性在这些平台上实现，我想确认时。

I don't mean to ask, is Comet easier in ASPNET than in Jetty? I mean, is Comet easier inn either ASPNET or Jetty, as compared to other alternatives? I think the asynch capabilities of ASP.NET and Jetty specifically make Comet more scalable when implemented on those platforms and I'd like to confirm that.

ASPNET推出的异步页早在2005年。当时的想法是应用熟悉.NET非同步模式，ASP.NET页面处理。

ASPNET introduced "Asynchronous pages" back in 2005. The idea was to apply the familiar .NET asynch model to ASP.NET page processing.

public partial class AsyncPage : System.Web.UI.Page
{
    private WebRequest _request;

    void Page_Load (object sender, EventArgs e)
    {
        AddOnPreRenderCompleteAsync (
            new BeginEventHandler(BeginAsyncOperation),
            new EndEventHandler (EndAsyncOperation)
        );
    }

    IAsyncResult BeginAsyncOperation (object sender, EventArgs e, 
        AsyncCallback cb, object state)
    {
        _request = WebRequest.Create("http://msdn.microsoft.com");
        return _request.BeginGetResponse (cb, state);
    }
    void EndAsyncOperation (IAsyncResult ar)
    {
        string text;
        using (WebResponse response = _request.EndGetResponse(ar))
        {
            using (StreamReader reader = 
                new StreamReader(response.GetResponseStream()))
            {
                text = reader.ReadToEnd();
            }
        }

        Regex regex = new Regex ("href\\s*=\\s*\"([^\"]*)\"", 
            RegexOptions.IgnoreCase);
        MatchCollection matches = regex.Matches(text);

        StringBuilder builder = new StringBuilder(1024);
        foreach (Match match in matches)
        {
            builder.Append (match.Groups[1]);
            builder.Append("<br/>");
        }

        Output.Text = builder.ToString ();
    }
}

Q1：这难道不是让ASP.NET扩展多的Comet风格的应用程序更好？
有没有人用这个和测试它？

Q1: Doesn't this make ASP.NET scale much better for Comet-style applications? Has anyone used this and tested it?

我认为其他的服务器端框架也有类似的东西。如果我没有记错的码头有这样的事情，从而能够更好地规模彗星场景。

I think that other server-side frameworks also have something similar. If I'm not mistaken Jetty has something like this, to enable better scale in Comet scenarios.

Q2：任何人都可以阐明的是的光？

Q2: Can anyone shed light on that?

推荐答案

在.NET中的异步处理确实为构建Comet应用程序的基础。具体地，它的IHttpAsyncHandler可以用来作为基础。

The asynchronous processing in .NET does indeed provide a basis for building comet applications. Specifically, it's the IHttpAsyncHandler that can be used as a foundation.

这是说，没有一个第三方库，实施彗星从无到有是...困难。有IIS的一个.NET实现彗星称为 WebSync 将比较的码头。

That said, without a third-party library, implementing Comet from scratch is... difficult. There's a .NET implementation of Comet for IIS called WebSync that would compare against Jetty.

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