update MeatKit (9a1a68ab68cd0650227af944ffa30d1166b9e056)

Assets/MeatKit/Editor/Updater/AsyncDownloader.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor;
+using UnityEngine.Networking;
+
+namespace MeatKit
+{
+    [InitializeOnLoad]
+    public static class AsyncDownloader
+    {
+        private static readonly Dictionary<UnityWebRequest, Action<UnityWebRequest>> ActiveRequests = new Dictionary<UnityWebRequest, Action<UnityWebRequest>>();
+
+        static AsyncDownloader()
+        {
+            EditorApplication.update += Update;
+        }
+
+        public static void WaitForCompletion(UnityWebRequest request, Action<UnityWebRequest> callback)
+        {
+            if (request == null) throw new ArgumentException("Request cannot be null", "request");
+            request.Send();
+            ActiveRequests.Add(request, callback);
+        }
+        
+        private static void Update()
+        {
+            foreach (var kv in ActiveRequests.ToArray())
+            {
+                UnityWebRequest request = kv.Key;
+                Action<UnityWebRequest> callback = kv.Value;
+                if (!request.isDone) continue;
+                if (callback != null) callback(request);
+                ActiveRequests.Remove(request);
+            }
+        }
+    }
+}