Feature/display request headers

viewer/Controllers/UpdatesController.cs

@@ -98,13 +98,16 @@ private async Task<JsonResult> HandleValidation(string jsonContent)
                 JsonConvert.DeserializeObject<List<GridEvent<Dictionary<string, string>>>>(jsonContent)
                     .First();
 
+            var headers = GetRequestHeaders();
+
             await this._hubContext.Clients.All.SendAsync(
                 "gridupdate",
                 gridEvent.Id,
                 gridEvent.EventType,
                 gridEvent.Subject,
                 gridEvent.EventTime.ToLongTimeString(),
-                jsonContent.ToString());
+                jsonContent.ToString(),
+                headers);
 
             // Retrieve the validation code and echo back.
             var validationCode = gridEvent.Data["validationCode"];
@@ -117,6 +120,8 @@ await this._hubContext.Clients.All.SendAsync(
         private async Task<IActionResult> HandleGridEvents(string jsonContent)
         {
             var events = JArray.Parse(jsonContent);
+            var headers = GetRequestHeaders();
+
             foreach (var e in events)
             {
                 // Invoke a method on the clients for 
@@ -128,7 +133,8 @@ await this._hubContext.Clients.All.SendAsync(
                     details.EventType,
                     details.Subject,
                     details.EventTime.ToLongTimeString(),
-                    e.ToString());
+                    e.ToString(),
+                    headers);
             }
 
             return Ok();
@@ -138,14 +144,16 @@ private async Task<IActionResult> HandleCloudEvent(string jsonContent)
         {
             var details = JsonConvert.DeserializeObject<CloudEvent<dynamic>>(jsonContent);
             var eventData = JObject.Parse(jsonContent);
+            var headers = GetRequestHeaders();
 
             await this._hubContext.Clients.All.SendAsync(
                 "gridupdate",
                 details.Id,
                 details.Type,
                 details.Subject,
                 details.Time,
-                eventData.ToString()
+                eventData.ToString(),
+                headers
             );
 
             return Ok();
@@ -173,6 +181,19 @@ private static bool IsCloudEvent(string jsonContent)
             return false;
         }
 
+        // Capture all HTTP request headers for debugging purposes
+        private Dictionary<string, string> GetRequestHeaders()
+        {
+            var headers = new Dictionary<string, string>();
+
+            foreach (var header in HttpContext.Request.Headers)
+            {
+                headers[header.Key] = string.Join(", ", header.Value);
+            }
+
+            return headers;
+        }
+
         #endregion
     }
 }

viewer/Views/Home/Index.cshtml

@@ -38,7 +38,12 @@
     <tr class="hiddenRow collapse" id="event-{{gridEventId}}">
         <td colspan="12">
             <div class="accordian-body">
+                <h5>Event Data:</h5>
                 <pre><code class="nohighlight">{{gridEvent}}</code></pre>
+                {{#if gridEventHeaders}}
+                <h5>Request Headers:</h5>
+                <pre><code class="json">{{gridEventHeaders}}</code></pre>
+                {{/if}}
             </div>
         </td>
     </tr>
@@ -60,12 +65,16 @@
             $("#grid-events").hide();
         }
 
-        var addEvent = function (id, eventType, subject, eventTime, data) {
+        var addEvent = function (id, eventType, subject, eventTime, data, headers) {
+            // Format headers for display
+            var formattedHeaders = headers && Object.keys(headers).length > 0 ? JSON.stringify(headers, null, 2) : null;
+
             var context = {
                 gridEventType: eventType,
                 gridEventSubject: subject,
                 gridEventId: id,
-                gridEvent: data
+                gridEvent: data,
+                gridEventHeaders: formattedHeaders
             };
             var source = document.getElementById('event-template').innerHTML;
             var template = Handlebars.compile(source);
@@ -88,8 +97,8 @@
                 .build();
 
             hubConnection.start().catch(err => console.error(err.toString()));
-            hubConnection.on('gridupdate', function (id, eventType, subject, eventTime, data) {
-                addEvent(id, eventType, subject, eventTime, data);
+            hubConnection.on('gridupdate', function (id, eventType, subject, eventTime, data, headers) {
+                addEvent(id, eventType, subject, eventTime, data, headers);
             });
         };