.NetCore 中间件学习

    public class TestMiddleware
    {
        private readonly RequestDelegate _next;

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

        public Task Invoke(HttpContext httpContext)
        {
            // TO DO
            return _next(httpContext);
        }
    }

    public static class TestMiddlewareExtensions
    {
        public static IApplicationBuilder UseTestMiddleware(this IApplicationBuilder builder)
        {
            return builder.UseMiddleware<TestMiddleware>();
        }
    }

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    //app.Use<TestMiddleware>();
    app.UseTestMiddleware();
}

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    app.Use(async (context, next) =>
    {
        // TO DO
        await next();
    });
}