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															@@ -111,7 +111,7 @@ namespace MediaBrowser.Common.Net.Handlers 
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															         /// <summary>
 
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															         /// <summary>
 
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															         /// Gets the MIME type to include in the response headers
 
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															         /// Gets the MIME type to include in the response headers
 
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															         /// </summary>
 
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															         /// </summary>
 
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															-        public abstract string ContentType { get; }
 
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															+        public abstract Task<string> GetContentType();
 
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															         /// <summary>
 
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															         /// <summary>
 
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															         /// Gets the status code to include in the response headers
 
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															         /// Gets the status code to include in the response headers
 
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															@@ -129,31 +129,9 @@ namespace MediaBrowser.Common.Net.Handlers 
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															             }
 
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															             }
 
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															         }
 
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															         }
 
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															-        private bool _LastDateModifiedDiscovered = false;
 
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															-        private DateTime? _LastDateModified = null;
 
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															-        /// <summary>
 
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															-        /// Gets the last date modified of the content being returned, if this can be determined.
 
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															-        /// This will be used to invalidate the cache, so it's not needed if CacheDuration is 0.
 
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															-        /// </summary>
 
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															-        public DateTime? LastDateModified
 
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															+        public virtual bool ShouldCompressResponse(string contentType)
 
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															         {
 
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															         {
 
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															-            get
 
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															-            {
 
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															-                if (!_LastDateModifiedDiscovered)
 
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															-                {
 
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															-                    _LastDateModified = GetLastDateModified();
 
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															-                }
 
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															-
 
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															-                return _LastDateModified;
 
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															-            }
 
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															-        }
 
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															-        
 
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															-        public virtual bool CompressResponse
 
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															-        {
 
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															-            get
 
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															-            {
 
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															-                return true;
 
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															-            }
 
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															+            return true;
 
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															         }
 
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															         }
 
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															         private bool ClientSupportsCompression
 
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															         private bool ClientSupportsCompression
 
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															@@ -207,10 +185,12 @@ namespace MediaBrowser.Common.Net.Handlers 
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															                 // When serving a range request, we need to return status code 206 to indicate a partial response body
 
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															                 // When serving a range request, we need to return status code 206 to indicate a partial response body
 
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															                 StatusCode = SupportsByteRangeRequests && IsRangeRequest ? 206 : 200;
 
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															                 StatusCode = SupportsByteRangeRequests && IsRangeRequest ? 206 : 200;
 
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															-                ctx.Response.ContentType = ContentType;
 
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															+                ctx.Response.ContentType = await GetContentType();
 
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															                 TimeSpan cacheDuration = CacheDuration;
 
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															                 TimeSpan cacheDuration = CacheDuration;
 
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															+                DateTime? lastDateModified = await GetLastDateModified();
 
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															+
 
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															                 if (ctx.Request.Headers.AllKeys.Contains("If-Modified-Since"))
 
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															                 if (ctx.Request.Headers.AllKeys.Contains("If-Modified-Since"))
 
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															                 {
 
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															                 {
 
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															                     DateTime ifModifiedSince;
 
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															                     DateTime ifModifiedSince;
 
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															@@ -218,18 +198,20 @@ namespace MediaBrowser.Common.Net.Handlers 
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															                     if (DateTime.TryParse(ctx.Request.Headers["If-Modified-Since"].Replace(" GMT", string.Empty), out ifModifiedSince))
 
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															                     if (DateTime.TryParse(ctx.Request.Headers["If-Modified-Since"].Replace(" GMT", string.Empty), out ifModifiedSince))
 
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															                     {
 
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															                     {
 
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															                         // If the cache hasn't expired yet just return a 304
 
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															                         // If the cache hasn't expired yet just return a 304
 
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															-                        if (IsCacheValid(ifModifiedSince, cacheDuration, LastDateModified))
 
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															+                        if (IsCacheValid(ifModifiedSince, cacheDuration, lastDateModified))
 
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															                         {
 
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															                         {
 
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															                             StatusCode = 304;
 
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															                             StatusCode = 304;
 
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															                         }
 
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															                         }
 
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															                     }
 
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															                     }
 
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															                 }
 
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															                 }
 
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															-                PrepareResponse();
 
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															+                await PrepareResponse();
 
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															                 if (IsResponseValid)
 
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															                 if (IsResponseValid)
 
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															                 {
 
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															                 {
 
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															-                    await ProcessUncachedRequest(ctx, cacheDuration);
 
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															+                    bool compressResponse = ShouldCompressResponse(ctx.Response.ContentType) && ClientSupportsCompression;
 
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															+
 
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															+                    await ProcessUncachedRequest(ctx, compressResponse, cacheDuration, lastDateModified);
 
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															                 }
 
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															                 }
 
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															                 else
 
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															                 else
 
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															                 {
 
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															                 {
 
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															@@ -241,7 +223,7 @@ namespace MediaBrowser.Common.Net.Handlers 
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															             {
 
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															             {
 
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															                 // It might be too late if some response data has already been transmitted, but try to set this
 
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															                 // It might be too late if some response data has already been transmitted, but try to set this
 
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															                 ctx.Response.StatusCode = 500;
 
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															                 ctx.Response.StatusCode = 500;
 
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															-                
 
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															+
 
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															                 Logger.LogException(ex);
 
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															                 Logger.LogException(ex);
 
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															             }
 
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															             }
 
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															             finally
 
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															             finally
 
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															@@ -250,7 +232,7 @@ namespace MediaBrowser.Common.Net.Handlers 
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															             }
 
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															             }
 
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															         }
 
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															         }
 
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															-        private async Task ProcessUncachedRequest(HttpListenerContext ctx, TimeSpan cacheDuration)
 
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															+        private async Task ProcessUncachedRequest(HttpListenerContext ctx, bool compressResponse, TimeSpan cacheDuration, DateTime? lastDateModified)
 
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															         {
 
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															         {
 
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															             long? totalContentLength = TotalContentLength;
 
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															             long? totalContentLength = TotalContentLength;
 
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															@@ -270,7 +252,7 @@ namespace MediaBrowser.Common.Net.Handlers 
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															             }
 
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															             }
 
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															             // Add the compression header
 
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															             // Add the compression header
 
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															-            if (CompressResponse && ClientSupportsCompression)
 
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															+            if (compressResponse)
 
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															             {
 
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															             {
 
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															                 ctx.Response.AddHeader("Content-Encoding", CompressionMethod);
 
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															                 ctx.Response.AddHeader("Content-Encoding", CompressionMethod);
 
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															             }
 
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															             }
 
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															@@ -278,7 +260,7 @@ namespace MediaBrowser.Common.Net.Handlers 
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															             // Add caching headers
 
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															             // Add caching headers
 
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															             if (cacheDuration.Ticks > 0)
 
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															             if (cacheDuration.Ticks > 0)
 
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															             {
 
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															             {
 
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															-                CacheResponse(ctx.Response, cacheDuration, LastDateModified);
 
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															+                CacheResponse(ctx.Response, cacheDuration, lastDateModified);
 
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															             }
 
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															             }
 
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															             // Set the status code
 
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															             // Set the status code
 
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															@@ -289,7 +271,7 @@ namespace MediaBrowser.Common.Net.Handlers 
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															                 // Finally, write the response data
 
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															                 // Finally, write the response data
 
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															                 Stream outputStream = ctx.Response.OutputStream;
 
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															                 Stream outputStream = ctx.Response.OutputStream;
 
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															-                if (CompressResponse && ClientSupportsCompression)
 
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															+                if (compressResponse)
 
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															                 {
 
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															                 {
 
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															                     if (CompressionMethod.Equals("deflate", StringComparison.OrdinalIgnoreCase))
 
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															                     if (CompressionMethod.Equals("deflate", StringComparison.OrdinalIgnoreCase))
 
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															                     {
 
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															                     {
 
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															@@ -321,10 +303,11 @@ namespace MediaBrowser.Common.Net.Handlers 
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															         }
 
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															         }
 
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															         /// <summary>
 
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															         /// <summary>
 
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															-        /// Gives subclasses a chance to do and prep work, and also to validate data and set an error status code, if needed
 
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															+        /// Gives subclasses a chance to do any prep work, and also to validate data and set an error status code, if needed
 
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															         /// </summary>
 
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															         /// </summary>
 
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															-        protected virtual void PrepareResponse()
 
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															+        protected virtual Task PrepareResponse()
 
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															         {
 
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															         {
 
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															+            return Task.Run(() => { });
 
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															         }
 
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															         }
 
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															         protected abstract Task WriteResponseToOutputStream(Stream stream);
 
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															         protected abstract Task WriteResponseToOutputStream(Stream stream);
 
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															@@ -372,9 +355,11 @@ namespace MediaBrowser.Common.Net.Handlers 
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															             return null;
 
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															             return null;
 
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															         }
 
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															         }
 
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															-        protected virtual DateTime? GetLastDateModified()
 
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															+        protected virtual Task<DateTime?> GetLastDateModified()
 
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															         {
 
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															         {
 
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															-            return null;
 
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															+            DateTime? value = null;
 
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															+
 
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															+            return Task.Run<DateTime?>(() => { return value; });
 
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															         }
 
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															         }
 
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															         private bool IsResponseValid
 
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															         private bool IsResponseValid
 
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