http解压缩gzip

        static async Task Main(string[] args)
        {
            var files = Directory.GetFiles("C:\Users\admin\Desktop\新建文件夹");

            foreach (string file in files)
            {
                var src = await File.ReadAllBytesAsync(file);
                ReadOnlySequence asMemory = new ReadOnlySequence(src.AsMemory());
                ReadSession(ref asMemory, out _);
                bool isgZip = false;
                await using MemoryStream ms = new MemoryStream(asMemory.ToArray());
                try
                {
                    GZipStream gZip=new GZipStream(ms,CompressionMode.Decompress);
                    await using MemoryStream destStream=new MemoryStream();
                    await gZip.CopyToAsync(destStream);
                    var destBytes = destStream.ToArray();
                    await File.WriteAllBytesAsync(file+"gzip1.txt",destBytes);
                    isgZip = true;
                }
                catch (Exception e)
                {
                    
                }

                if (!isgZip)
                {
                    await File.WriteAllBytesAsync(file + "gzip0.txt", asMemory.ToArray());
                }


            }
        }

        public static bool ReadSession(ref ReadOnlySequence buffer,
            out ReadOnlySequence request)
        {
            ReadOnlySpan newSplit = new[] { (byte)'
', (byte)'
' , (byte)'
', (byte)'
' };
            var reader = new SequenceReader(buffer);
            if (reader.TryReadTo(out request, newSplit))
            {
                buffer = buffer.Slice(reader.Position);
                return true;
            }
            request = default;
            return false;

        }