如何使用 HtmlAgilityPack - C# 提取完整的 url [英] How to extract full url with HtmlAgilityPack - C#

问题描述

好的，下面的方法只提取这样的引用网址

Alright with the way below it is extracting only referring url like this

提取码:

foreach (HtmlNode link in hdDoc.DocumentNode.SelectNodes("//a[@href]"))
{
    lsLinks.Add(link.Attributes["href"].Value.ToString());
}

网址代码

<a href="Login.aspx">Login</a>

提取的网址

Login.aspx

但我想获得浏览器解析的真实链接

But i want to get real link what browser parsed like

http://www.monstermmorpg.com/Login.aspx

我可以通过检查 url 是否包含 http 来实现，如果不添加域值，但在某些情况下可能会导致一些问题，我认为这不是一个非常明智的解决方案.

I can do it with checking the url whether containing http and if not add the domain value but it may cause some problems at some occasions and i think not a very wise solution.

c# 4.0 , HtmlAgilityPack.1.4.0

c# 4.0 , HtmlAgilityPack.1.4.0

推荐答案

假设您有原始 url，您可以将解析后的 url 组合成这样:

Assuming you have the original url, you can combine the parsed url something like this:

// The address of the page you crawled
var baseUrl = new Uri("http://example.com/path/to-page/here.aspx");

// root relative
var url = new Uri(baseUrl, "/Login.aspx");
Console.WriteLine (url.AbsoluteUri); // prints 'http://example.com/Logon.aspx'

// relative
url = new Uri(baseUrl, "../foo.aspx?q=1");
Console.WriteLine (url.AbsoluteUri); // prints 'http://example.com/path/foo.aspx?q=1'

// absolute
url = new Uri(baseUrl, "http://stackoverflow.com/questions/7760286/");
Console.WriteLine (url.AbsoluteUri); // prints 'http://stackoverflow.com/questions/7760286/'

// other...
url = new Uri(baseUrl, "javascript:void(0)");
Console.WriteLine (url.AbsoluteUri); // prints 'javascript:void(0)'

注意使用 AbsoluteUri 而不是依赖于 ToString() 因为 ToString 解码 URL(使其更人类可读"")，这通常不是您想要的.

Note the use of AbsoluteUri and not relying on ToString() because ToString decodes the URL (to make it more "human-readable"), which is not typically what you want.

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