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

namespace Blog3000.Server.MiddleWares
{
    public class NoCacheHeaderAdder
    {
        private string[] urls;

        public NoCacheHeaderAdder(string[] urls)
        {
            this.urls = urls;
        }

        public void Process(HttpContext context)
        {
            var p = context.Request.Path.ToString().ToLowerInvariant();

            bool noCache = false;
            foreach (var u in urls)
            {
                if (p.StartsWith(u))
                {
                    noCache = true;
                    break;
                }
            }

            if (noCache)
            {
                context.Response.Headers.Add("Pragma", "no-cache"); // HTTP1.0
                context.Response.Headers.Add("Cache-Control", "no-cache, must-revalidate"); // HTTP1.1
            }


        }
    }
}