BaseLoader: fix load text resource from assets

src/main/haxework/net/BaseLoader.hx

@@ -1,5 +1,6 @@
 package haxework.net;
 
+import flash.utils.JSON;
 import haxe.Timer;
 import flash.net.URLRequestMethod;
 import flash.events.ProgressEvent;
@@ -79,14 +80,26 @@ class BaseLoader<T> extends Deferred<T> implements ILoader<T> {
   public function GET(url:String, data:Dynamic = null):Deferred<T> {
     #if (openfl && lime)
     if (StringTools.startsWith(url, "%assets%")) {
+      try {
         var path:String = url.substring(9);
+        // ToDo: get text resources with getText method
+        var extension:String = path.substring(path.lastIndexOf(".")+1, path.length);
+        if (extension == "json" || extension == "txt") {
+          var data:T = cast JSON.parse(openfl.Assets.getText(path));
+          resolve(data);
+          return this;
+        }
         var bytes:ByteArray = openfl.Assets.getBytes(path);
         if (bytes == null) {
           throwError("Bytes is null for asset: " + path);
-        return null;
+          return this;
         } else {
           return fromBytes(bytes);
         }
+      } catch (error:Dynamic) {
+        throwError(error);
+        return this;
+      }
     }
     #end
     return request(url, URLRequestMethod.GET, data);