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Parámetros

Parámetro Detalles
IDictionary<string,object> environment Esta es la única recopilación en la que OWIN comunica información durante una llamada. Todas las claves se pueden encontrar en https://docs.asp.net/en/latest/fundamentals/owin.html#owin-keys

Observaciones

El tipo AppFunc es solo un alias para el tipo Func<IDictionary<string, object>, Task> para acortar las firmas de métodos, de manera muy similar a typedef en C ++.

Muestra la ruta de la solicitud y el tiempo que llevó procesarla.

//define a short alias to avoid chubby method signatures
using AppFunc = Func<IDictionary<string, object>, Task>;

class RequestTimeMiddleware
{
    private AppFunc _next;

    public RequestTimeMiddleware(AppFunc next)
    {
        _next = next;
    }

    public async Task Invoke(IDictionary<string, object> environment)
    {
        IOwinContext context = new OwinContext(environment);
        
        var path = context.Request.Path;
        var sw = Stopwatch.StartNew();
        //Queue up the next middleware in the pipeline
        await _next(environment);
        //When the request comes back, log the elapsed time
        Console.WriteLine($"Request for {path} processed in {sw.ElapsedMilliseconds}ms");
    }
}

public static class RequestTimeMiddlewareExtensions
{
    //Extension method as syntactic sugar, to get a meaningful way 
    //in adding the middleware to the pipeline
    public static void UseRequestTimeMiddleware(this IAppBuilder app)
    {
        app.Use<RequestTimeMiddleware>();
    }
}


public class Startup
{
    public void Configuration(IAppBuilder app)
    {
        //add the Middleware as early as possible
        app.UseRequestTimeMiddleware();
        //Queue up every other module
        app.Use(async (environment, next) =>
        {
            await environment.Response.WriteAsync("Hello from the console world");
            await next();
        });
    }
}


Modified text is an extract of the original Stack Overflow Documentation
Licenciado bajo CC BY-SA 3.0
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