Asp.Net Core2.0获取客户IP地址，及解决发布到Ubuntu服务器获取不到正确IP解决办法

1、获取客户端IP地址实现方法（扩展类）

 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc.ModelBinding;
 using System.Collections.Generic;
 using System.Linq;

 namespace WebApi.Controllers
 {
     /// <summary>
     /// 扩展类
     /// </summary>
     public static class Extension
     {
         /// <summary>
         /// 获取客户Ip
         /// </summary>
         /// <param name="context"></param>
         /// <returns></returns>
         public static string GetClientUserIp(this HttpContext context)
         {
             var ip = context.Request.Headers["X-Forwarded-For"].FirstOrDefault();
             if (string.IsNullOrEmpty(ip))
             {
                 ip = context.Connection.RemoteIpAddress.ToString();
             }
             return ip;
         }
     }
 }

调用该方法：

var ip = HttpContext.GetClientUserIp();

2、解决Asp.Net Core2.0发布到Ubuntu后不能正确获取客户IP解决办法

         /// <summary>
         ///
         /// </summary>
         /// <param name="app"></param>
         /// <param name="env"></param>
         /// <param name="loggerFactory"></param>
         public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
         {
             #region 解决Ubuntu Nginx 代理不能获取IP问题
             app.UseForwardedHeaders(new ForwardedHeadersOptions
             {
                 ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
             });
             #endregion
         }

本人站点用的是Nginx进行代理，而站点指向是本地Ip,不能正确获得客户的IP,这时就需要通过Nginx获取到的IP传递给站点

Nginx的配置

 server {
         listen ;
          server_name www.xxx.com;
          root /var/www/html;
           index index.html index.htm index.nginx-debian.html;

         location / {
         proxy_pass http://localhost:5000;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection keep-alive;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_cache_bypass $http_upgrade;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     }
 }

重启Nginx：

sudo service nginx restart;