从主机获取有效的web url.TopLevelDomain c#

本文关键字：url TopLevelDomain web 主机 获取 有效 | 更新日期: 2023-09-27 18:16:52

给定一个包含部分url的字符串，例如"google.com"

是否有可能从该字符串获得有效的URI ?

预期的结果将是相同的，你从任何网页浏览器的地址栏中放置google.com。例如http://www.google.com/

最后我想把这个值传递给一个新的Uri对象，这样我就可以在HttpWebRequest中使用它来检索Favicons。

从主机获取有效的web url.TopLevelDomain c#

你在找这样的东西吗?

class Program
    {
        static void Main(string[] args)
        {
            var URL = "google.com/Somepath/";
            var CorrectedURL = new TopLevelURL(URL,"http").ParsedURL;
            Console.WriteLine(CorrectedURL);
            Console.Read();
        }

    }
    public class TopLevelURL
    {
        private string URL = "";
        private string Protocol = "";
        public string ParsedURL { get; private set; }
        public TopLevelURL(string _URL,string WantedProtocol)
        {
            URL = _URL;
            Protocol = (WantedProtocol == "http" ? "http://" : "https://") ?? "http://";
            ParseURL();
        }
        private void ParseURL()
        {
            if (URL.ToLower().Contains("http"))
            {
                //If the URL is provided with the protocol check the validity of URL
                if (!Uri.IsWellFormedUriString(URL, UriKind.RelativeOrAbsolute))
                    throw new Exception("Malformed URL!");
                //If the URL is provided with the protocol and is valid, just get the absolute URL. e.g: http://helloworld.com
                URL = new Uri(URL).AbsoluteUri.Replace(new Uri(URL).AbsolutePath, "");
            }
            else
            { 
                //If the URL does not have the protocol then start constructing it with the protocol
                URL = Protocol + URL;
                if(!Uri.IsWellFormedUriString(URL,UriKind.RelativeOrAbsolute))
                    throw new Exception("Could not parse the URL. Invalid character before the domain name!");
                URL = new Uri(URL).AbsoluteUri.Replace(new Uri(URL).AbsolutePath,"");
            }
            ParsedURL = URL;
        }

    }

这是简化的。你可以登录http://doepud.co.uk/blog/anatomy-of-a-url查看更严格的规则。上面的示例检查简单协议，并在删除路径后输出URL。

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