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

48 lines
1.6 KiB

using System.IO;
using System.IO.Compression;
using System.Linq;
using Nancy;
using Nancy.Bootstrapper;
namespace NzbDrone.Api.Extensions.Pipelines
{
public class GzipCompressionPipeline : IRegisterNancyPipeline
{
public void Register(IPipelines pipelines)
{
pipelines.AfterRequest.AddItemToEndOfPipeline(c => CompressResponse(c.Request, c.Response));
}
private Response CompressResponse(Request request, Response response)
{
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 =>
{
data.CopyTo(stream);
stream.Flush();
};
}
else
{
response.Headers["Content-Encoding"] = "gzip";
response.Contents = s =>
{
var gzip = new GZipStream(s, CompressionMode.Compress, true);
data.CopyTo(gzip);
gzip.Close();
};
}
}
return response;
}
}
}