Add RequestTraceMiddleware in Hosting project.

Source/Euonia.Hosting/Extensions/ServiceCollectionExtensions.cs

@@ -155,7 +155,7 @@ public static IServiceCollection AddUserPrincipal(this IServiceCollection servic
     }
 
     /// <summary>
-    /// 
+    /// Add <see cref="Serilog.ILogger"/> as logging provider.
     /// </summary>
     /// <param name="services"></param>
     /// <returns></returns>
@@ -174,7 +174,7 @@ public static IServiceCollection AddSerilog(this IServiceCollection services)
     }
 
     /// <summary>
-    /// 
+    /// Get hosting environment from <see cref="IServiceCollection"/>.
     /// </summary>
     /// <param name="services"></param>
     /// <returns></returns>

Source/Euonia.Hosting/HostingModule.cs

@@ -21,6 +21,7 @@ public override void OnApplicationInitialization(ApplicationInitializationContex
     {
         base.OnApplicationInitialization(context);
         var app = context.GetApplicationBuilder();
+        app.UseMiddleware<RequestTraceMiddleware>();
         app.Use(async (httpContext, next) =>
         {
             var accessor = httpContext.RequestServices.GetService<IServiceAccessor>();

Source/Euonia.Hosting/Middlewares/RequestTraceMiddleware.cs

@@ -0,0 +1,20 @@
+using Microsoft.AspNetCore.Http;
+
+namespace Nerosoft.Euonia.Hosting;
+
+public class RequestTraceMiddleware
+{
+    private readonly RequestDelegate _next;
+
+    public RequestTraceMiddleware(RequestDelegate next)
+    {
+        _next = next;
+    }
+
+    public async Task InvokeAsync(HttpContext context)
+    {
+        context.Response.Headers.Add("x-request-trace-id", context.TraceIdentifier);
+
+        await _next(context);
+    }
+}