Can you list and describe custom middleware you have created or used in your projects?

In C# projects using ASP.NET Core, I have created custom middleware to solve various tasks, such as:

• Request and response logging: middleware intercepts HTTP requests and responses, recording important information (URL, method, execution time) for monitoring and debugging.

• Error handling: middleware that catches exceptions occurring in the request processing pipeline and formats a unified error response.

• Authentication and authorization: custom middleware for token verification or other authentication methods when standard solutions are not suitable.

Example of simple middleware for request logging:

public class RequestLoggingMiddleware
{
    private readonly RequestDelegate _next;

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

    public async Task InvokeAsync(HttpContext context)
    {
        Console.WriteLine($"Request: {context.Request.Method} {context.Request.Path}");
        await _next(context);
        Console.WriteLine($"Response Status: {context.Response.StatusCode}");
    }
}

// Registration in Startup.cs
// app.UseMiddleware<RequestLoggingMiddleware>();