using System.Web;
using System.Web.Mvc;

namespace WeApp
{
    public class AccessOriginalAttribute : ActionFilterAttribute, IExceptionFilter
    {
        public void InternalExecuteAccessController(HttpResponseBase response, HttpRequestBase request)
        {
            var header = response.Headers;
            var requestHeader = request.Headers;
            header.Set("Access-Control-Allow-Origin", requestHeader["Origin"] ?? "http://" + requestHeader["Host"]);
            header.Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
            header.Set("Access-Control-Max-Age", "3600");
            header.Set("Access-Control-Allow-Headers", "*");
            header.Set("Access-Control-Allow-Credentials", "true");
            header.Set("X-Frame-Options", "allow-from *");
        }

        //public override void OnActionExecuting(ActionExecutingContext filterContext)
        //{
        //    base.OnActionExecuting(filterContext);
        //}

        public override void OnActionExecuted(ActionExecutedContext filterContext)
        {
            InternalExecuteAccessController(filterContext.HttpContext.Response, filterContext.HttpContext.Request);
            base.OnActionExecuted(filterContext);
        }

        //public override void OnResultExecuting(ResultExecutingContext filterContext)
        //{
        //    base.OnResultExecuting(filterContext);
        //}

        //public override void OnResultExecuted(ResultExecutedContext filterContext)
        //{
        //    base.OnResultExecuted(filterContext);
        //}

        public void OnException(ExceptionContext filterContext)
        {
            filterContext.Result = new JsonResult()
            {
                Data = new { Succeed = 0, filterContext.Exception.Message },
                JsonRequestBehavior = JsonRequestBehavior.AllowGet
            };
            filterContext.ExceptionHandled = true;
        }
    }
}