c#关于Content-Encoding: gzip的读取方法

一个网站返回的response，CharacterSet = "gb2312"，读取时编码用了Encoding.GetEncoding("gb2312")，转成字符串后乱码，然后发现ContentEncoding = "gzip"，搜索以后这个格式是压缩过的 https://www.cnblogs.com/lexus/archive/2013/04/03/2997451.html，这边解决方法是python的，又找了c#的 https://blog.csdn.net/apple151128/article/details/46708491：

private string GZipDecompress(Stream webStream)
{
    using (System.IO.Compression.GZipStream stream = new System.IO.Compression.GZipStream(webStream, System.IO.Compression.CompressionMode.Decompress))
    {
        stream.Flush();
        byte[] decompressBuffer = ToByteArray(stream);
        int nSizeIncept = decompressBuffer.Length;
        stream.Close();
        return System.Text.Encoding.GetEncoding("gb2312").GetString(decompressBuffer, 0, nSizeIncept);   //转换为普通的字符串，这里编码可以根据CharacterSet修改
    }
}

private byte[] ToByteArray(Stream stream)
{
    byte[] buffer = new byte[32768];
    using (MemoryStream ms = new MemoryStream())
    {
        while (true)
        {
            int read = stream.Read(buffer, 0, buffer.Length);
            if (read <= 0)
                return ms.ToArray();
            ms.Write(buffer, 0, read);
        }
    }
}

 另：中文乱码 https://blog.csdn.net/yewuzhitou/article/details/106387718