fixed plugin assembly downloads as well as debug/release detection with nuget assemblies

MediaBrowser.Common/Net/BaseRestService.cs

@@ -241,6 +241,10 @@ namespace MediaBrowser.Common.Net
             {
                 return false;
             }
+            if (contentType.StartsWith("application/", StringComparison.OrdinalIgnoreCase))
+            {
+                return false;
+            }
 
             return true;
         }
@@ -257,7 +261,10 @@ namespace MediaBrowser.Common.Net
             if (!compress || string.IsNullOrEmpty(RequestContext.CompressionType))
             {
                 Response.ContentType = contentType;
-                return await factoryFn().ConfigureAwait(false);
+
+                var stream = await factoryFn().ConfigureAwait(false);
+
+                return new StreamWriter(stream);
             }
 
             string content;

MediaBrowser.Common/Net/MimeTypes.cs

@@ -173,7 +173,7 @@ namespace MediaBrowser.Common.Net
             // Misc
             if (ext.Equals(".dll", StringComparison.OrdinalIgnoreCase))
             {
-                return "application/x-msdownload";
+                return "application/octet-stream";
             }
 
             // Web

MediaBrowser.Common/Net/StreamWriter.cs

@@ -0,0 +1,48 @@
+using ServiceStack.Service;
+using System.IO;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Common.Net
+{
+    /// <summary>
+    /// Class StreamWriter
+    /// </summary>
+    public class StreamWriter : IStreamWriter
+    {
+        /// <summary>
+        /// Gets or sets the source stream.
+        /// </summary>
+        /// <value>The source stream.</value>
+        public Stream SourceStream { get; set; }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="StreamWriter" /> class.
+        /// </summary>
+        /// <param name="source">The source.</param>
+        public StreamWriter(Stream source)
+        {
+            SourceStream = source;
+        }
+
+        /// <summary>
+        /// Writes to.
+        /// </summary>
+        /// <param name="responseStream">The response stream.</param>
+        public void WriteTo(Stream responseStream)
+        {
+            var task = WriteToAsync(responseStream);
+
+            Task.WaitAll(task);
+        }
+
+        /// <summary>
+        /// Writes to async.
+        /// </summary>
+        /// <param name="responseStream">The response stream.</param>
+        /// <returns>Task.</returns>
+        private Task WriteToAsync(Stream responseStream)
+        {
+            return SourceStream.CopyToAsync(responseStream);
+        }
+    }
+}