Log error if gzip fails during response

src/NzbDrone.Api/Extensions/Pipelines/GZipPipeline.cs

@@ -1,13 +1,22 @@
-using System.IO;
+using System;
+using System.IO;
 using System.IO.Compression;
 using System.Linq;
 using Nancy;
 using Nancy.Bootstrapper;
+using NLog;
 
 namespace NzbDrone.Api.Extensions.Pipelines
 {
     public class GzipCompressionPipeline : IRegisterNancyPipeline
     {
+        private readonly Logger _logger;
+
+        public GzipCompressionPipeline(Logger logger)
+        {
+            _logger = logger;
+        }
+
         public void Register(IPipelines pipelines)
         {
             pipelines.AfterRequest.AddItemToEndOfPipeline(c => CompressResponse(c.Request, c.Response));
@@ -15,34 +24,43 @@ namespace NzbDrone.Api.Extensions.Pipelines
 
         private Response CompressResponse(Request request, Response response)
         {
-            if (!response.ContentType.Contains("image")
+            try
+            {
+                if (!response.ContentType.Contains("image")
                 && request.Headers.AcceptEncoding.Any(x => x.Contains("gzip"))
                 && (!response.Headers.ContainsKey("Content-Encoding") || response.Headers["Content-Encoding"] != "gzip"))
-            {
-                var data = new MemoryStream();
-                response.Contents.Invoke(data);
-                data.Position = 0;
-                if (data.Length < 1024)
                 {
-                    response.Contents = stream =>
+                    var data = new MemoryStream();
+                    response.Contents.Invoke(data);
+                    data.Position = 0;
+                    if (data.Length < 1024)
                     {
-                        data.CopyTo(stream);
-                        stream.Flush();
-                    };
-                }
-                else
-                {
-                    response.Headers["Content-Encoding"] = "gzip";
-                    response.Contents = s =>
+                        response.Contents = stream =>
+                        {
+                            data.CopyTo(stream);
+                            stream.Flush();
+                        };
+                    }
+                    else
                     {
-                        var gzip = new GZipStream(s, CompressionMode.Compress, true);
-                        data.CopyTo(gzip);
-                        gzip.Close();
-                    };
+                        response.Headers["Content-Encoding"] = "gzip";
+                        response.Contents = s =>
+                        {
+                            var gzip = new GZipStream(s, CompressionMode.Compress, true);
+                            data.CopyTo(gzip);
+                            gzip.Close();
+                        };
+                    }
                 }
+
+                return response;
             }
 
-            return response;
+            catch (Exception ex)
+            {
+                _logger.ErrorException("Unable to gzip response", ex);
+                throw;
+            }
         }
     }
 }