从HTML Agility Pack HtmlWeb获取HttpWebResponse

本文介绍了从HTML Agility Pack HtmlWeb获取HttpWebResponse的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

能否从Html Agility Pack HtmlWeb获得HttpWebResponse?

Can HttpWebResponse be obtained from Html Agility Pack HtmlWeb?

如是，如果我打电话:

HtmlWeb web = new HtmlWeb ();
HtmlDocument document = web.Load ("http://stackoverflow.com/");

是否有一种方便的方法从web实例中检索HttpWebResponse以查看标头-例如检索标头属性(如内容类型)?

Is there a convenient method to retrieve the HttpWebResponse from the web instance to view headers - such as to retrieve header properties like content type?

有前任和后任代表，它们将起作用:

There are pre and post delegates, which will work:

HtmlWeb web = new HtmlWeb ();

web.PreRequest = delegate (HttpWebRequest request) {
    request.Timeout = 10 * 1000;
    return true;
};
web.PostResponse = delegate (HttpWebRequest request, HttpWebResponse response) {
    //response.Headers;
    //response.ContentType;
};

HtmlDocument document = web.Load ("http://stackoverflow.com/");

相反，有没有办法获得类似以下内容的响应:(HttpWebResponse)web.GetResponse();

Instead, is there a way to get the response something like: (HttpWebResponse)web.GetResponse();

推荐答案

您可以使用TaskCompletionSource + async/await

You can use TaskCompletionSource + async/await

var web = new HtmlAgilityPack.HtmlWeb();
var tcs = new TaskCompletionSource<HttpWebResponse>();

web.PostResponse = delegate(HttpWebRequest request, HttpWebResponse response)
{
    tcs.SetResult(response);
};

var  document = web.Load("http://stackoverflow.com/");
var httpWebResponse = await tcs.Task;

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