从asp.net代码获取一些网站的来源

using System;
using System.Net.Http;
using System.Threading.Tasks;
using HtmlAgilityPack;
using System.Text.RegularExpressions;

namespace GetWebsiteSource
{
    class Program
    {
        static async Task Main(string[] args)
        {
            string url = "https://www.example.com";
            string html = await GetHtmlAsync(url);
            HtmlDocument document = new HtmlDocument();
            document.LoadHtml(html);

            string source = ExtractSource(document);
            Console.WriteLine(source);
        }

        static async Task<string> GetHtmlAsync(string url)
        {
            using HttpClient client = new HttpClient();
            HttpResponseMessage response = await client.GetAsync(url);
            response.EnsureSuccessStatusCode();
            return await response.Content.ReadAsStringAsync();
        }

        static string ExtractSource(HtmlDocument document)
        {
            string source = "";
            HtmlNodeCollection nodes = document.DocumentNode.SelectNodes("//script[@src]");
            if (nodes != null)
            {
                foreach (HtmlNode node in nodes)
                {
                    string src = node.Attributes["src"].Value;
                    if (src.StartsWith("http"))
                    {
                        source += src + "\n";
                    }
                    else
                    {
                        source += node.BaseUri.AbsoluteUri + src + "\n";
                    }
                }
            }
            return source;
        }
    }
}