GEEKING

Client.LegacyAssemblies/Roblox.Common/CcrHttpHandler.cs

@@ -0,0 +1,120 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Threading;
+using System.Web;
+using Microsoft.Ccr.Core;
+using Roblox.Common;
+
+namespace Roblox.Ccr
+{
+    public abstract class HttpHandler : IHttpAsyncHandler, IHttpHandler
+    {
+        static HttpHandler()
+        {
+            new Thread(MonitorPerformance) 
+                { IsBackground = true, Name = "Performance Monitor: Ccr.HttpHandler" }
+                .Start();
+        }
+
+        protected abstract IEnumerator<ITask> Execute(HttpContext context);
+
+        protected virtual bool SynchronousExecute(HttpContext context) => false;
+
+        private IEnumerator<ITask> ExecuteAndComplete(HttpContext context, FastAsyncResult result)
+        {
+            IEnumerator<ITask> enu;
+            try
+            {
+                enu = Execute(context);
+            }
+            catch (Exception completed)
+            {
+                result.SetCompleted(completed);
+                yield break;
+            }
+
+            using (enu)
+            {
+                for (;;)
+                {
+                    try
+                    {
+                        if (!enu.MoveNext())
+                        {
+                            result.SetCompleted();
+                            yield break;
+                        }
+                    }
+                    catch (Exception completed)
+                    {
+                        result.SetCompleted(completed);
+                        yield break;
+                    }
+
+                    yield return enu.Current;
+                }
+            }
+        }
+
+        private static void MonitorPerformance()
+        {
+            try
+            {
+                var categoryName = "Roblox Ccr.HttpHandler";
+                if (!PerformanceCounterCategory.Exists(categoryName))
+                {
+                    var counterCreationDataCollection = new CounterCreationDataCollection();
+                    counterCreationDataCollection.Add(new CounterCreationData("Pending Async Calls", string.Empty,
+                        PerformanceCounterType.NumberOfItems64));
+                    PerformanceCounterCategory.Create(categoryName, string.Empty,
+                        PerformanceCounterCategoryType.SingleInstance, counterCreationDataCollection);
+                }
+
+                var perfPendingAsyncCalls = new PerformanceCounter(categoryName, "Pending Async Calls", false);
+                while (true)
+                {
+                    perfPendingAsyncCalls.RawValue = _PendingAsyncCalls;
+                    Thread.Sleep(500);
+                }
+            }
+            catch (ThreadAbortException)
+            {
+            }
+            catch (Exception ex)
+            {
+                ExceptionHandler.LogException(ex);
+            }
+        }
+
+        public IAsyncResult BeginProcessRequest(HttpContext context, AsyncCallback cb, object extraData)
+        {
+            if (SynchronousExecute(context))
+                return new SynchronousCompletionAsyncResult(cb, extraData);
+            Interlocked.Increment(ref _PendingAsyncCalls);
+
+            var asyncResult = new FastAsyncResult(cb, extraData);
+            CcrService.Singleton.SpawnIterator(context, asyncResult, ExecuteAndComplete);
+            return asyncResult;
+        }
+
+        public void EndProcessRequest(IAsyncResult result)
+        {
+            var fastResult = result as FastAsyncResult;
+
+            if (fastResult != null)
+            {
+                var error = fastResult.Error;
+                fastResult.Dispose();
+                Interlocked.Decrement(ref _PendingAsyncCalls);
+                if (error != null) throw new ApplicationException("Roblox.Ccr.HttpHandler Error", error);
+            }
+        }
+        
+        public abstract bool IsReusable { get; }
+
+        public void ProcessRequest(HttpContext context) => throw new NotImplementedException();
+
+        private static long _PendingAsyncCalls;
+    }
+}