为什么我在7-ZipSDK上收到数据错误异常？winrar 5解压缩

Question

我附加了特殊的winrar存档，sdk给了我错误。拜托你能帮帮我吗？

用于模拟错误和测试的存档

打电话给示例：

 MemoryStream inputMemoryStream = new MemoryStream();
 string archiveFilePath = @"c:\winrar.rar";
 File.OpenRead(archiveFilePath).CopyTo(inputMemoryStream);
 var bb = ExtractBytes(inputMemoryStream.ToArray());



private byte[] ExtractBytes(byte[] data)
{
        using (var inStream = new MemoryStream(data))
        {
            var decoder = new SevenZip.Compression.LZMA.Decoder();
            inStream.Seek(0, 0);
            using (var outStream = new MemoryStream())
            {
                long outSize;
                decoder.SetDecoderProperties(GetLzmaProperties(inStream, out outSize));
                decoder.Code(inStream, outStream, inStream.Length - inStream.Position, outSize, null);
                return outStream.ToArray();
            }
        }
 }
    
     private byte[] GetLzmaProperties(Stream inStream, out long outSize)
    {
        var lzmAproperties = new byte[5];
        if (inStream.Read(lzmAproperties, 0, 5) != 5)
        {
            throw new Exception("LzmaException");
        }
        outSize = 0;
        for (int i = 0; i < 8; i++)
        {
            int b = inStream.ReadByte();
            if (b < 0)
            {
                throw new Exception("LzmaException");
            }
            outSize |= ((long)(byte)b) << (i << 3);
        }
        return lzmAproperties;
    }

当调用代码函数时出现异常：

decoder.Code(inStream, outStream, inStream.Length - inStream.Position, outSize, null);

https://www.7-zip.org/sdk.html ver.19.00

异常调试详细信息

​

想要的行为: 7zip支持winrar，那么我的代码出了什么问题？

存档格式信息：https://superuser.com/questions/770370/what-is-the-difference-between-rar-and-rar5-compression

Answer 1

无法使用LZMA SDK提取RAR档案：

• RAR不使用LZMA作为压缩算法，LZMA SDK也不支持RAR。
• Zip和LZMA SDK不是一回事。
• 7-Zip使用RARLAB的unrar代码，这是专有的。