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:

/// <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：