发布：2022/11/13 23:26:37作者：管理员 来源：本站 浏览次数：867

重点是拿到HttpContext 对象。

先从Headers["Cdn-Src-Ip"] 中取IP，其次从Headers["X-Forwarded-For"] 取，最后从context.Connection.RemoteIpAddress 中取。

有可能遇到“::ffff:192.168.2.131” 这种IP,把"::ffff:"Replace掉。

工具类CoreMvcClientIpUtil：

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namespace CommonUtils

{

   public static class CoreMvcClientIpUtil

   {

       public static string GetClientIP(HttpContext context)

       {

           var ip = context.Request.Headers["Cdn-Src-Ip"].FirstOrDefault();

           if (!string.IsNullOrEmpty(ip))

               return IpReplace(ip);

           ip = context.Request.Headers["X-Forwarded-For"].FirstOrDefault();

           if (!string.IsNullOrEmpty(ip))

               return IpReplace(ip);

           ip = context.Connection.RemoteIpAddress.ToString();

           return IpReplace(ip);

       }

       static string IpReplace(string inip)

       {

           //::ffff:

           //::ffff:192.168.2.131 这种IP处理

           if (inip.Contains("::ffff:"))

           {

               inip = inip.Replace("::ffff:", "");

           }

           return inip;

       }

   }

}

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一、使用HttpContextAccessor

在Program.cs中增加一行：

//获取IP使用

builder.Services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

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var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllersWithViews();

//获取IP使用

builder.Services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

var app = builder.Build();

// Configure the HTTP request pipeline.

if (!app.Environment.IsDevelopment())

{

   app.UseExceptionHandler("/Home/Error");

}

app.UseStaticFiles();

app.UseRouting();

app.UseAuthorization();

app.MapControllerRoute(

   name: "default",

   pattern: "{controller=Home}/{action=Index}/{id?}");

app.Run();

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修改Controller:

全局变量增加

private readonly IHttpContextAccessor _httpContextAccessor;

构造函数增加

_httpContextAccessor = httpContextAccessor;

Action中获取IP

var ip = CoreMvcClientIpUtil.GetClientIP(_httpContextAccessor.HttpContext);

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using CommonUtils;

using CommonUtils.Extensions;

using Microsoft.AspNetCore.Mvc;

namespace AspNetCoreMvcClientIp2.Controllers

{

   public class OkController : Controller

   {

       private readonly IHttpContextAccessor _httpContextAccessor;

       public OkController(IHttpContextAccessor httpContextAccessor)

       {

           _httpContextAccessor = httpContextAccessor;

       }

       // GET: OkController

       public ActionResult Index()

       {

           var ip = CoreMvcClientIpUtil.GetClientIP(_httpContextAccessor.HttpContext);

           ViewBag.myip1 = "ip:" + ip;

           //直接实例化HttpContextAccessor

           IHttpContextAccessor ih = new HttpContextAccessor();

           string ip2 = CoreMvcClientIpUtil.GetClientIP(ih.HttpContext);

           ViewBag.myip2 = "ip2:" + ip2;

           //使用ControllerBase的HttpContext

           var ip3 = CoreMvcClientIpUtil.GetClientIP(HttpContext);

           ViewBag.myip3 = "ip3:" + ip3;

           //扩展方法

           var ip4 = HttpContext.GetClientIP();

           ViewBag.myip4 = "ip4:" + ip4;

           return View();

       }

   }

}

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也可以直接实例化HttpContextAccessor：

IHttpContextAccessor ih = new HttpContextAccessor();

           string ip2 = CoreMvcClientIpUtil.GetClientIP(ih.HttpContext);

二、使用ControllerBase的HttpContext

//使用ControllerBase的HttpContext

           var ip3 = CoreMvcClientIpUtil.GetClientIP(HttpContext);

           ViewBag.myip3 = "ip3:" + ip3;

三、扩展HttpContext

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using Microsoft.AspNetCore.Http;

namespace CommonUtils.Extensions

{

   public static class HttpContextExtension

   {

       public static string GetClientIP(this HttpContext context)

       {

           var ip = context.Request.Headers["Cdn-Src-Ip"].FirstOrDefault();

           if (!string.IsNullOrEmpty(ip))

               return IpReplace(ip);

           ip = context.Request.Headers["X-Forwarded-For"].FirstOrDefault();

           if (!string.IsNullOrEmpty(ip))

               return IpReplace(ip);

           ip = context.Connection.RemoteIpAddress.ToString();

           return IpReplace(ip);

       }

       static string IpReplace(string inip)

       {

           //::ffff:

           //::ffff:192.168.2.131 这种IP处理

           if (inip.Contains("::ffff:"))

           {

               inip = inip.Replace("::ffff:", "");

           }

           return inip;

       }

   }

}

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在Controller中使用时要using CommonUtils.Extensions;

var ip4 = HttpContext.GetClientIP();

           ViewBag.myip = "ip4:" + ip4;