34 lines
1.1 KiB
C#
34 lines
1.1 KiB
C#
// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT License.
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using System;
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using System.IO;
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using System.IO.Compression;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Mvc.Filters;
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namespace mvc.Controllers
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{
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internal sealed class DeflateFilter : ResultFilterAttribute
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{
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public override async Task OnResultExecutionAsync( ResultExecutingContext context, ResultExecutionDelegate next)
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{
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var httpContext = context.HttpContext;
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using (var memoryStream = new MemoryStream())
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{
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var responseStream = httpContext.Response.Body;
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httpContext.Response.Body = memoryStream;
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await next();
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using (var compressedStream = new DeflateStream(responseStream, CompressionLevel.Fastest))
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{
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httpContext.Response.Headers.Add("Content-Encoding", new[] { "deflate" });
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memoryStream.Seek(0, SeekOrigin.Begin);
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await memoryStream.CopyToAsync(compressedStream);
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}
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}
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}
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}
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}
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