.NET Core EndRequest中间件 [英] .NET Core EndRequest Middleware

问题描述

我正在构建 ASP.NET Core MVC 应用程序，并且需要像以前在 Global.asax中进行的那样 EndRequest 事件.

I'm builing ASP.NET Core MVC application and I need to have EndRequest event like I had before in Global.asax.

我该如何实现?

推荐答案

创建中间件并确保尽快在管道中注册它就很容易.

It's as easy as creating a middleware and making sure it gets registered as soon as possible in the pipeline.

例如:

public class EndRequestMiddleware
{
    private readonly RequestDelegate _next;

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

    public async Task Invoke(HttpContext context)
    {
        // Do tasks before other middleware here, aka 'BeginRequest'
        // ...

        // Let the middleware pipeline run
        await _next(context);

        // Do tasks after middleware here, aka 'EndRequest'
        // ...
    }
}

对await _next(context)的调用将导致所有中间件在管道中运行.执行完所有中间件后，将执行await _next(context)之后的 调用代码.有关中间件的更多信息，请参见 ASP.NET Core中间件文档. .尤其是来自文档的此图像使中间件执行更加清晰:

The call to await _next(context) will cause all middleware down the pipeline to run. After all middleware has been executed, the code after the await _next(context) call will be executed. See the ASP.NET Core middleware docs for more information about middleware. Especially this image from the docs makes middleware execution clear:

现在我们必须将其注册到Startup类中的管道中，最好尽快注册:

Now we have to register it to the pipeline in Startup class, preferably as soon as possible:

public void Configure(IApplicationBuilder app)
{
    app.UseMiddleware<EndRequestMiddleware>();

    // Register other middelware here such as:
    app.UseMvc();
}

这篇关于.NET Core EndRequest中间件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！