Display downtime message for Nebulance

src/NzbDrone.Core/Indexers/Definitions/Nebulance.cs

@@ -228,10 +228,21 @@ namespace NzbDrone.Core.Indexers.Definitions
 
             if (indexerResponse.HttpResponse.StatusCode != HttpStatusCode.OK)
             {
-                throw new IndexerException(indexerResponse, $"Unexpected response status {indexerResponse.HttpResponse.StatusCode} code from indexer request");
+                throw new IndexerException(indexerResponse, "Unexpected response status '{0}' code from indexer request", indexerResponse.HttpResponse.StatusCode);
             }
 
-            var jsonResponse = STJson.Deserialize<JsonRpcResponse<NebulanceTorrents>>(indexerResponse.HttpResponse.Content);
+            JsonRpcResponse<NebulanceTorrents> jsonResponse;
+
+            try
+            {
+                jsonResponse = STJson.Deserialize<JsonRpcResponse<NebulanceTorrents>>(indexerResponse.HttpResponse.Content);
+            }
+            catch (Exception ex)
+            {
+                STJson.TryDeserialize<JsonRpcResponse<string>>(indexerResponse.HttpResponse.Content, out var response);
+
+                throw new IndexerException(indexerResponse, "Unexpected response from indexer request: {0}", ex, response?.Result ?? ex.Message);
+            }
 
             if (jsonResponse.Error != null || jsonResponse.Result == null)
             {

src/NzbDrone.Core/Indexers/Exceptions/IndexerException.cs

@@ -1,23 +1,34 @@
-using NzbDrone.Common.Exceptions;
+using System;
+using NzbDrone.Common.Exceptions;
 
 namespace NzbDrone.Core.Indexers.Exceptions
 {
     public class IndexerException : NzbDroneException
     {
-        private readonly IndexerResponse _indexerResponse;
+        public IndexerResponse Response { get; }
+
+        public IndexerException(IndexerResponse response, string message)
+            : base(message)
+        {
+            Response = response;
+        }
+
+        public IndexerException(IndexerResponse response, string message, Exception innerException)
+            : base(message, innerException)
+        {
+            Response = response;
+        }
 
         public IndexerException(IndexerResponse response, string message, params object[] args)
             : base(message, args)
         {
-            _indexerResponse = response;
+            Response = response;
         }
 
-        public IndexerException(IndexerResponse response, string message)
-            : base(message)
+        public IndexerException(IndexerResponse response, string message, Exception innerException, params object[] args)
+            : base(message, innerException, args)
         {
-            _indexerResponse = response;
+            Response = response;
         }
-
-        public IndexerResponse Response => _indexerResponse;
     }
 }