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@ -5,6 +5,7 @@ using System.Linq;
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using Nancy;
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using Nancy;
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using Nancy.Bootstrapper;
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using Nancy.Bootstrapper;
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using NLog;
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using NLog;
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using NzbDrone.Common.Extensions;
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namespace NzbDrone.Api.Extensions.Pipelines
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namespace NzbDrone.Api.Extensions.Pipelines
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{
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{
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@ -21,50 +22,62 @@ namespace NzbDrone.Api.Extensions.Pipelines
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public void Register(IPipelines pipelines)
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public void Register(IPipelines pipelines)
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{
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{
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pipelines.AfterRequest.AddItemToEndOfPipeline(c => CompressResponse(c.Request, c.Response));
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pipelines.AfterRequest.AddItemToEndOfPipeline(CompressResponse);
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}
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}
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private Response CompressResponse(Request request, Response response)
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private void CompressResponse(NancyContext context)
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{
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{
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var request = context.Request;
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var response = context.Response;
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try
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try
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{
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{
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if (
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if (
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!response.ContentType.Contains("image")
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!response.ContentType.Contains("image")
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&& !response.ContentType.Contains("font")
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&& !response.ContentType.Contains("font")
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&& request.Headers.AcceptEncoding.Any(x => x.Contains("gzip"))
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&& request.Headers.AcceptEncoding.Any(x => x.Contains("gzip"))
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&& (!response.Headers.ContainsKey("Content-Encoding") || response.Headers["Content-Encoding"] != "gzip"))
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&& !AlreadyGzipEncoded(response)
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&& !ContentLengthIsTooSmall(response))
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{
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{
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var data = new MemoryStream();
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var contents = response.Contents;
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response.Contents.Invoke(data);
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data.Position = 0;
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response.Headers["Content-Encoding"] = "gzip";
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if (data.Length < 1024)
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response.Contents = responseStream =>
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{
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{
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response.Contents = stream =>
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using (var gzip = new GZipStream(responseStream, CompressionMode.Compress, true))
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using (var buffered = new BufferedStream(gzip, 8192))
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{
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{
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data.CopyTo(stream);
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contents.Invoke(buffered);
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stream.Flush();
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};
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}
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}
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else
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{
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response.Headers["Content-Encoding"] = "gzip";
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response.Contents = s =>
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{
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var gzip = new GZipStream(s, CompressionMode.Compress, true);
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data.CopyTo(gzip);
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gzip.Close();
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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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return response;
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}
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catch (Exception ex)
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catch (Exception ex)
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{
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{
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_logger.Error(ex, "Unable to gzip response");
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_logger.Error(ex, "Unable to gzip response");
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throw;
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throw;
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}
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}
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}
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}
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private static bool ContentLengthIsTooSmall(Response response)
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{
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var contentLength = response.Headers.GetValueOrDefault("Content-Length");
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if (contentLength != null && long.Parse(contentLength) < 1024)
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{
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return true;
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}
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return false;
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}
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private static bool AlreadyGzipEncoded(Response response)
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{
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var contentEncoding = response.Headers.GetValueOrDefault("Content-Encoding");
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if (contentEncoding == "gzip")
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{
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return true;
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}
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return false;
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}
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}
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}
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}
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}
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