added cloudevents v1 validation support

Author: dbarkol

viewer/Controllers/UpdatesController.cs

@@ -43,6 +43,21 @@ public UpdatesController(IHubContext<GridEventsHub> gridEventsHubContext)
 
         #region Public Methods
 
+        [HttpOptions]
+        public async Task<IActionResult> Options()
+        {
+            using (var reader = new StreamReader(Request.Body, Encoding.UTF8))
+            {
+                var webhookRequestOrigin = HttpContext.Request.Headers["WebHook-Request-Origin"].FirstOrDefault();
+                var webhookRequestCallback = HttpContext.Request.Headers["WebHook-Request-Callback"];
+                var webhookRequestRate = HttpContext.Request.Headers["WebHook-Request-Rate"];
+                HttpContext.Response.Headers.Add("WebHook-Allowed-Rate", "*");
+                HttpContext.Response.Headers.Add("WebHook-Allowed-Origin", webhookRequestOrigin);
+            }
+
+            return Ok();
+        }
+
         [HttpPost]
         public async Task<IActionResult> Post()
         {
@@ -122,14 +137,15 @@ await this._hubContext.Clients.All.SendAsync(
         private async Task<IActionResult> HandleCloudEvent(string jsonContent)
         {
             var details = JsonConvert.DeserializeObject<CloudEvent<dynamic>>(jsonContent);
+            var eventData = JObject.Parse(jsonContent);
 
             await this._hubContext.Clients.All.SendAsync(
                 "gridupdate",
                 details.Id,
                 details.Type,
-                details.Source,
+                details.Subject,
                 details.Time,
-                jsonContent
+                eventData.ToString()
             );
 
             return Ok();