Writing Custom Middleware in ASP.NET Core 6.x

Prerequisites

Prerequisites

Prerequisites

 .Net 6.x

public class MyCustomMiddleware
{
    private readonly RequestDelegate _next;

    public MyCustomMiddleware(RequestDelegate next)
    {
        _next = next;
    }

    // IMessageWriter is injected into InvokeAsync
    public async Task InvokeAsync(HttpContext httpContext, IMessageWriter svc)
    {
        svc.Write(DateTime.Now.Ticks.ToString());
        await _next(httpContext);
    }
}

public static class MyCustomMiddlewareExtensions
{
    public static IApplicationBuilder UseMyCustomMiddleware(
        this IApplicationBuilder builder)
    {
        return builder.UseMiddleware<MyCustomMiddleware>();
    }
}

How to use

var builder = WebApplication.CreateBuilder(args);


var app = builder.Build();

app.UseHttpsRedirection();

app.UseMyCustomMiddleware();

app.MapGet("/", () => "Hello World!");

app.Run();