[Asp.net core]自定义中间件

            using
             System;

            using
             System.Collections.Generic;

            using
             System.Linq;

            using
             System.Threading.Tasks;

            using
             Microsoft.AspNetCore.Builder;

            using
             Microsoft.AspNetCore.Http;

            using
             Microsoft.Extensions.Logging;


            namespace
             Wolfy.IPDemo.Middlewares
{
    
            //
             You may need to install the Microsoft.AspNetCore.Http.Abstractions package into your project
            public
            class
             IPMiddleware
    {
        
            private
            readonly
             RequestDelegate _next;
        
            private
            readonly
             ILogger _logger;
        
            public
             IPMiddleware(RequestDelegate next, ILoggerFactory loggerFactory)
        {
            _next = next;
            _logger = loggerFactory.CreateLogger<IPMiddleware>();
        }

        public Task Invoke(HttpContext httpContext)
        {
            _logger.LogInformation($"Client Ip:{httpContext.Connection.RemoteIpAddress.ToString()}");
            return _next(httpContext);
        }
    }

    // Extension method used to add the middleware to the HTTP request pipeline.publicstaticclass IPMiddlewareExtensions
    {
        publicstatic IApplicationBuilder UseIP(this IApplicationBuilder builder)
        {
            return builder.UseMiddleware<IPMiddleware>();
        }
    }
}

            public
            class
             Startup
    {
        
            //
             This method gets called by the runtime. Use this method to add services to the container.
        
            //
             For more information on how to configure your application, visit 
            http://go.microsoft.com/fwlink/?LinkID=398940
            public
            void
             ConfigureServices(IServiceCollection services)
        {
        }

        
            //
             This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
            public
            void
             Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
        {
            loggerFactory.AddConsole();
            app.UseIP();
            
            if
             (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            app.Run(
            async (context) =>
            {
                await context.Response.WriteAsync("Hello World!");
            });
        }
    }