Created
November 24, 2016 00:51
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using System; | |
using System.Collections.Generic; | |
using System.Linq; | |
using System.Threading; | |
using System.Threading.Tasks; | |
using System.Web; | |
namespace WebApplication1 | |
{ | |
public class Run : HttpTaskAsyncHandler | |
{ | |
static Dictionary<string, Tuple<DateTime, TaskCompletionSource<object>>> list = new Dictionary<string, Tuple<DateTime, TaskCompletionSource<object>>>(); | |
public static Tuple<string, DateTime>[] List | |
{ | |
get { | |
lock (list) { | |
return list.Select(x => Tuple.Create(x.Key, x.Value.Item1)).ToArray(); | |
} | |
} | |
} | |
public static void SetResult(string key) | |
{ | |
if (!ValidateKey(key)) { | |
return; | |
} | |
Tuple<DateTime, TaskCompletionSource<object>> t; | |
lock (list) { | |
if (!list.TryGetValue(key, out t)) { | |
return; | |
} | |
list.Remove(key); | |
} | |
t.Item2.SetResult(null); | |
} | |
static Timer timer = new Timer((_) => { | |
var now = DateTime.Now; | |
TaskCompletionSource<object>[] tcs; | |
lock (list) { | |
var expired = list.Where(x => now.Subtract(x.Value.Item1).TotalSeconds >= 5).ToArray(); | |
tcs = expired.Select(x => x.Value.Item2).ToArray(); | |
foreach (var x in expired) { | |
list.Remove(x.Key); | |
} | |
} | |
foreach (var x in tcs) { | |
x.SetResult(null); | |
} | |
}, null, 3000, 3000); | |
static Task Listen(string key) | |
{ | |
var tcs = new TaskCompletionSource<object>(); | |
lock (list) { | |
list.Add(key, Tuple.Create(DateTime.Now, tcs)); | |
} | |
return tcs.Task; | |
} | |
static string CreateKey() | |
{ | |
return Guid.NewGuid().ToString("N"); | |
} | |
static bool ValidateKey(string s) | |
{ | |
Guid _; | |
return Guid.TryParseExact(s, "N", out _); | |
} | |
public override async Task ProcessRequestAsync(HttpContext context) | |
{ | |
var key = CreateKey(); | |
await Listen(key); | |
if (!context.Response.IsClientConnected) { | |
return; | |
} | |
} | |
} | |
} |
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