using Microsoft.AspNetCore.Http;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WIDESEA_Core.Middlewares
{
    public class HttpRequestMiddleware
    {
        private readonly RequestDelegate _next;

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

        /// <summary>
        /// 中间件方法，用于处理HTTP请求上下文。
        /// 向响应头添加"Access-Control-Expose-Headers"字段，允许客户端访问自定义头"WIDESEA_exp"。
        /// </summary>
        /// <param name="context">HTTP请求上下文对象</param>
        /// <returns>异步任务</returns>
        public async Task InvokeAsync(HttpContext context)
        {
            context.Response.Headers.Add("Access-Control-Expose-Headers", "WIDESEA_exp");
            await _next(context);
        }
    }
}