Light12306/ChatRoomServer.Www/Controllers/AnnouncementController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace ChatRoomServer.Www.Controllers
{
	using System.Data.Entity;
	using System.Text.RegularExpressions;
	using System.Threading.Tasks;
	using System.Web.Http.Cors;
	using System.Web.Mvc.Filters;
	using ChatRoomServer.Db;
	using FSLib.MvcWeb;
	using FSLib.Network.Http;

	public class AnnouncementController : Controller
	{
		/// <summary>
		/// Called when authorization occurs.
		/// </summary>
		/// <param name="filterContext">Information about the current request and action.</param>
		protected override void OnAuthorization(AuthorizationContext filterContext)
		{
			base.OnAuthorization(filterContext);

			var origin = filterContext.RequestContext.HttpContext.Request.Headers["Origin"];
			if (!origin.IsNullOrEmpty())
			{
				if (!Regex.IsMatch(origin, @"^https?://.*?\.(fishlee\.net|liebao\.cn)$", RegexOptions.IgnoreCase))
				{
					filterContext.Result = new EmptyResult();
					return;
				}

				filterContext.HttpContext.Response.AppendHeader("Access-Control-Allow-Origin", origin);
			}
		}


		[AllowAnonymous]
		[HttpGet, OutputCache(Duration = 1200, VaryByHeader = "Origin")]
		public async Task<ContentResult> List()
		{
			var client = new HttpClient();
			var ctx = client.Create<string>(HttpMethod.Get, $"http://{Request.Url.Host}:{Request.Url.Port}/api/announcement/list");
			await ctx.SendAsync().ConfigureAwait(false);

			return Content(ctx.Result, "application/json");
		}
	}
}