52 lines
1.6 KiB
C#
52 lines
1.6 KiB
C#
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using System.IO.Compression;
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namespace PARR.Infrastructure.Redis.Helpers
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{
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/// <summary>
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/// Архивация/разарзивация данных
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/// </summary>
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internal static class CompressionHelper
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{
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// Не сжимать маленькие значения
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private const int MinCompressionSize = 1024; // 1Кб
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/// <summary>
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/// Сжать
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/// </summary>
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/// <param name="data"></param>
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/// <returns></returns>
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public static byte[] Compress(byte[] data)
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{
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if (data.Length < MinCompressionSize)
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return data;
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using var output = new MemoryStream();
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using (var gzip = new GZipStream(output, CompressionLevel.Optimal))
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{
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gzip.Write(data, 0, data.Length);
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}
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return output.ToArray();
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}
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/// <summary>
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/// Разархивировать если это GZip
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/// </summary>
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/// <param name="data"></param>
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/// <returns></returns>
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public static byte[] Decompress(byte[] data)
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{
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// Проверяем сигнатуру GZip (0x1F, 0x8B)
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if (data.Length < 2 || data[0] != 0x1F || data[1] != 0x8B)
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return data; // Не сжато
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using var input = new MemoryStream(data);
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using var gzip = new GZipStream(input, CompressionMode.Decompress);
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using var output = new MemoryStream();
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gzip.CopyTo(output);
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return output.ToArray();
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}
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}
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}
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