public override void ExecuteResult(ControllerContext context)
{
TextWriter writer = context.HttpContext.Response.Output;
PaperRoll roll = PaperPond.Get(this.voteId);
roll.Write(writer);
}
private static void removedCallback(string key, Object value, CacheItemRemovedReason reason)
{
if (reason == CacheItemRemovedReason.Expired)
{
PaperRoll obj = (PaperRoll)value;
//insertNew(key, obj.VoteId);
}
}
private static PaperRoll insertNew(string key, string vote_id)
{
PaperRoll obj = new PaperRoll(vote_id); // if concurrency happens, this will be done more than once.
HttpRuntime.Cache.Insert(key, obj, null, DateTime.Now.AddSeconds(Consts.DEFAULT_CACHE_SECONDS),
Cache.NoSlidingExpiration, CacheItemPriority.Default, removedCallback);
// expires after some time for multi-node synchronization (unreliable).
return(obj);
}
public static PaperRoll Get(string vote_id)
{
string key = "PaperPond." + vote_id;
PaperRoll obj = (PaperRoll)HttpRuntime.Cache.Get(key);
if (obj == null)
{
obj = insertNew(key, vote_id);
}
return(obj);
}
public ActionResult VotePage(string vote_id)
{
// Todo: non-existent vote.
PaperRoll roll = PaperPond.Get(vote_id);
string title = roll.GetSetting("headings-title");
if (title == null)
{
title = "新投票";
}
ViewBag.Title = title /* + " | www.fotous.net"*/;
// Razor will do html encode to prevent xss attack.
return(View("VotePage"));
//return File("/Views/vote.html", "text/html");
}