Radarr/NzbDrone.Api/Extensions/GZipPipeline.cs

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using System.IO;
using System.IO.Compression;
using System.Linq;
using Nancy;
namespace NzbDrone.Api.Extensions
{
public static class GzipCompressionPipeline
{
public static void Handle(NancyContext context)
{
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context.Response.CompressResponse(context.Request);
}
public static Response CompressResponse(this Response response, Request request)
{
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if (!response.ContentType.Contains("image")
&& request.Headers.AcceptEncoding.Any(x => x.Contains("gzip"))
&& (!response.Headers.ContainsKey("Content-Encoding") || response.Headers["Content-Encoding"] != "gzip"))
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{
var data = new MemoryStream();
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response.Contents.Invoke(data);
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data.Position = 0;
if (data.Length < 1024)
{
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response.Contents = stream =>
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{
data.CopyTo(stream);
stream.Flush();
};
}
else
{
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response.Headers["Content-Encoding"] = "gzip";
response.Contents = s =>
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{
var gzip = new GZipStream(s, CompressionMode.Compress, true);
data.CopyTo(gzip);
gzip.Close();
};
}
}
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return response;
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}
}
}