apewer-dotnet/Apewer/Internals/GzipHelper.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Text;

namespace Apewer.Internals
{

    internal class GzipHelper
    {

        /// <summary>对数据进行 GZip 压缩。</summary>
        public static byte[] ToGzip(byte[] bytes)
        {
            if (bytes == null) return Constant.EmptyBytes;
            if (bytes.Length == 0) return Constant.EmptyBytes;

            byte[] result;
            var output = new MemoryStream();
            var zip = new GZipStream(output, CompressionMode.Compress, true);
            zip.Write(bytes, 0, bytes.Length);
            zip.Close();
            zip.Dispose();
            result = output.ToArray();
            output.Close();
            output.Dispose();
            return result;
        }

        /// <summary>对数据进行 GZip 解压。</summary>
        public static byte[] FromGzip(byte[] bytes)
        {
            if (bytes == null) return Constant.EmptyBytes;
            if (bytes.Length == 0) return Constant.EmptyBytes;

            byte[] result;
            var input = new MemoryStream(bytes);
            var output = new MemoryStream();
            input.Position = 0;
            var zip = new GZipStream(input, CompressionMode.Decompress, true);
            StreamHelper.Read(zip, output, 64);
            result = output.ToArray();
            zip.Close();
            zip.Dispose();
            input.Close();
            input.Dispose();
            output.Close();
            output.Dispose();
            return result;
        }

    }

}