asp.net core使用jexus部署在linux无法正确 获取远程ip的解决办法

asp.net core程序部署在centos7（下面的解决方案，其他系统都能使用，这里只是我自己部署在centos7），使用服务器jexus进行部署，AppHost模式。

因为请求是由jexus进行了转发的，所以asp.net zero获取的ip永远都是127.0.0.1.。

解决方案：

使用由Jexus作者宇内流云提供的JwsIntegration替换IISIntegration，它改变默认从请求头获取ip的规则，改为由 “X-Original-For”获取远程ip（经测试 使用"X-Real-IP"也能获取）。

JwsIntegration.cs:

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/// <summary> /// 用于处理客户IP地址、端口的HostBuilder中间件 /// </summary> public static class WebHostBuilderJexusExtensions {       /// <summary>     /// 启用JexusIntegration中间件     /// </summary>     /// <param name="hostBuilder"></param>     /// <returns></returns>     public static IWebHostBuilder UseJexusIntegration(this IWebHostBuilder hostBuilder)     {         if (hostBuilder == null)         {             throw new ArgumentNullException(nameof(hostBuilder));         }           // 检查是否已经加载过了         if (hostBuilder.GetSetting(nameof(UseJexusIntegration)) != null)         {             return hostBuilder;         }             // 设置已加载标记，防止重复加载         hostBuilder.UseSetting(nameof(UseJexusIntegration), true.ToString());             // 添加configure处理         hostBuilder.ConfigureServices(services =>         {             services.AddSingleton<IStartupFilter>(new JwsSetupFilter());         });             return hostBuilder;     }   }   class JwsSetupFilter : IStartupFilter {     public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next)     {         return app =>         {             app.UseMiddleware<JexusMiddleware>();             next(app);         };     } }     class JexusMiddleware {     readonly RequestDelegate _next;     public JexusMiddleware(RequestDelegate next, ILoggerFactory loggerFactory, IOptions<IISOptions> options)     {         _next = next;     }       public async Task Invoke(HttpContext httpContext)     {         var headers = httpContext.Request.Headers;           try         {             if (headers != null && headers.ContainsKey("X-Original-For"))             {                 var ipaddAdndPort = headers["X-Original-For"].ToArray()[0];                 var dot = ipaddAdndPort.IndexOf(":", StringComparison.Ordinal);                 var ip = ipaddAdndPort;                 var port = 0;                 if (dot > 0)                 {                     ip = ipaddAdndPort.Substring(0, dot);                     port = int.Parse(ipaddAdndPort.Substring(dot + 1));                 }                   httpContext.Connection.RemoteIpAddress = System.Net.IPAddress.Parse(ip);                 if (port != 0) httpContext.Connection.RemotePort = port;             }         }         finally         {             await _next(httpContext);         }       }   }

使用方法：