Add GetRemoteIp ext method

MyApp.ServiceInterface/Data/StatUtils.cs

@@ -1,6 +1,7 @@
 using System.Security.Claims;
 using Microsoft.AspNetCore.Http;
 using MyApp.ServiceModel;
+using ServiceStack;
 
 namespace MyApp.Data;
 
@@ -10,11 +11,23 @@ public static class StatUtils
     public static string? GetUserName(this ClaimsPrincipal? user) => user?.Identity?.Name;
     public static bool IsAdminOrModerator(this ClaimsPrincipal? user) => Stats.IsAdminOrModerator(user?.Identity?.Name);
 
+    public static string? GetRemoteIp(this HttpContext? ctx)
+    {
+        var headers = ctx?.Request.Headers;
+        if (headers == null)
+            return null;
+        return string.IsNullOrEmpty(headers[HttpHeaders.XForwardedFor])
+            ? headers[HttpHeaders.XForwardedFor].ToString()
+            : string.IsNullOrEmpty(headers[HttpHeaders.XRealIp])
+                ? headers[HttpHeaders.XForwardedFor].ToString()
+                : ctx?.Connection.RemoteIpAddress?.ToString();
+    }
+
     public static T WithRequest<T>(this T stat, HttpContext? ctx) where T : StatBase
     {
         var user = ctx?.User;
         stat.UserName = user?.Identity?.Name;
-        stat.RemoteIp = ctx?.Connection.RemoteIpAddress?.ToString();
+        stat.RemoteIp = ctx.GetRemoteIp();
         stat.CreatedDate = DateTime.UtcNow;
         return stat;
     }