.net获取来路域名

using Microsoft.AspNetCore.Mvc;
using System;

public class HomeController : Controller
{
    public IActionResult Index()
    {
        string referer = Request.Headers["Referer"].ToString();
        if (!string.IsNullOrEmpty(referer))
        {
            Uri refererUri = new Uri(referer);
            string domain = refererUri.Host;
            // 处理域名信息
            return View("Domain", domain);
        }
        else
        {
            return View("NoReferer");
        }
    }
}

public void ConfigureServices(IServiceCollection services)
{
    services.AddCors(options =>
    {
        options.AddPolicy("AllowAllOrigins",
            builder =>
            {
                builder.AllowAnyOrigin()
                       .AllowAnyHeader()
                       .AllowAnyMethod();
            });
    });

    services.AddControllersWithViews();
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    if (env.IsDevelopment())
    {
        app.UseDeveloperExceptionPage();
    }
    else
    {
        app.UseExceptionHandler("/Home/Error");
        app.UseHsts();
    }

    app.UseHttpsRedirection();
    app.UseStaticFiles();

    app.UseRouting();

    app.UseCors("AllowAllOrigins");

    app.UseAuthorization();

    app.UseEndpoints(endpoints =>
    {
        endpoints.MapControllerRoute(
            name: "default",
            pattern: "{controller=Home}/{action=Index}/{id?}");
    });
}