您好,欢迎来到榕意旅游网。
搜索
您的当前位置:首页ASP.NET Core中间件计算Http请求时间示例详解

ASP.NET Core中间件计算Http请求时间示例详解

来源:榕意旅游网

ASP.NET Core通过RequestDelegate这个委托类型来定义中间件

public delegate Task RequestDelegate(HttpContext context);

可将一个单独的请求委托并行指定为匿名方法(称为并行中间件),或在类中对其进行定义。可通过Use,或在Middleware类中配置要传递给委托执行的方法(参数类型HttpContext,返回值类型Task)。

public static IApplicationBuilder Use(this IApplicationBuilder app, Func<HttpContext, Func<Task>, Task> middleware);

public static IApplicationBuilder UseMiddleware<TMiddleware>(this IApplicationBuilder app, params object[] args);

通过定义一个中间件类 来计算http请求的时间,例:

public class ResponseTimeMiddleware
{
 // Name of the Response Header, Custom Headers starts with "X-" 
 private const string RESPONSE_HEADER_RESPONSE_TIME = "X-Response-Time-ms";
 // Handle to the next Middleware in the pipeline 
 private readonly RequestDelegate _next;
 public ResponseTimeMiddleware(RequestDelegate next)
 {
 _next = next;
 }
 public Task InvokeAsync(HttpContext context)
 {
 // Start the Timer using Stopwatch 
 var watch = new Stopwatch();
 watch.Start();
 context.Response.OnStarting(() => {
 // Stop the timer information and calculate the time 
 watch.Stop();
 var responseTimeForCompleteRequest = watch.ElapsedMilliseconds;
 // Add the Response time information in the Response headers. 
 context.Response.Headers[RESPONSE_HEADER_RESPONSE_TIME] = responseTimeForCompleteRequest.ToString();
 return Task.CompletedTask;
 });
 // Call the next delegate/middleware in the pipeline 
 return this._next(context);
 }
}

总结

Copyright © 2019- nryq.cn 版权所有 赣ICP备2024042798号-6

违法及侵权请联系:TEL:199 1889 7713 E-MAIL:2724546146@qq.com

本站由北京市万商天勤律师事务所王兴未律师提供法律服务