.Net 6 System.IO.Compression 问题是否有任何解决方法。 DeflateStream.Read 方法在 .Net 6 中工作不正确,但在旧版本中工作正常
Is there any workaround for .Net 6 System.IO.Compression issue. DeflateStream.Read method works incorrect in .Net 6, but works fine in older versions
这里是真实项目的代码,采用了问题,所以一些数据是硬编码的:
static void Main(string[] args)
{
Console.WriteLine("Starting. " + Environment.Version);
using (var stream = new FileStream(@"stream_test.txt", FileMode.Open))
{
stream.Position = 0;
// .NET implements Deflate (RFC 1951) but not zlib (RFC 1950),
// so we have to skip the first two bytes.
stream.ReadByte();
stream.ReadByte();
var zipStream = new DeflateStream(stream, CompressionMode.Decompress, true);
// Hardcoded length from real project. In the previous .Net versions this is size of final result
long bytesToRead = (long)262 * 350;
var buffer = new byte[bytesToRead];
int bytesWereRead = zipStream.Read(buffer, 0, (int)bytesToRead);
if (bytesWereRead != bytesToRead)
{
throw new Exception("ZIP stream was not fully decompressed.");
}
Console.WriteLine("Ok");
Console.ReadKey();
}
}
解压问题并未出现在每个流上,因此可以在带有项目代码的 GitHub 上找到输入文件。 https://github.com/dimsa/Net6DeflateStreamIssue/tree/main/DeflateStreamTest
此代码在正常上有效:
- .NET Framework(已在 2.0、3.5、4 上测试)
- .NET 标准 2.1 和
- .NET 5
.NET 6 失败。 Net 6中解压后的数据长度不正确
是否有任何解决方法,或者应该使用其他压缩库?
DeflateStream 在 .NET 6 中的运行方式发生了重大变化。您可以阅读更多相关信息和建议的操作 in this Microsoft documentation。
基本上,您需要包装 .Read
操作并检查读取的长度与预期长度,因为操作现在可能 return 在读取完整长度之前。您的代码可能如下所示(基于文档中的示例):
int totalRead = 0;
var buffer = new byte[bytesToRead];
while (totalRead < buffer.Length)
{
int bytesRead = zipStream.Read(buffer.Slice(totalRead));
if (bytesRead == 0) break;
totalRead += bytesRead;
}
这里是真实项目的代码,采用了问题,所以一些数据是硬编码的:
static void Main(string[] args)
{
Console.WriteLine("Starting. " + Environment.Version);
using (var stream = new FileStream(@"stream_test.txt", FileMode.Open))
{
stream.Position = 0;
// .NET implements Deflate (RFC 1951) but not zlib (RFC 1950),
// so we have to skip the first two bytes.
stream.ReadByte();
stream.ReadByte();
var zipStream = new DeflateStream(stream, CompressionMode.Decompress, true);
// Hardcoded length from real project. In the previous .Net versions this is size of final result
long bytesToRead = (long)262 * 350;
var buffer = new byte[bytesToRead];
int bytesWereRead = zipStream.Read(buffer, 0, (int)bytesToRead);
if (bytesWereRead != bytesToRead)
{
throw new Exception("ZIP stream was not fully decompressed.");
}
Console.WriteLine("Ok");
Console.ReadKey();
}
}
解压问题并未出现在每个流上,因此可以在带有项目代码的 GitHub 上找到输入文件。 https://github.com/dimsa/Net6DeflateStreamIssue/tree/main/DeflateStreamTest
此代码在正常上有效:
- .NET Framework(已在 2.0、3.5、4 上测试)
- .NET 标准 2.1 和
- .NET 5
.NET 6 失败。 Net 6中解压后的数据长度不正确
是否有任何解决方法,或者应该使用其他压缩库?
DeflateStream 在 .NET 6 中的运行方式发生了重大变化。您可以阅读更多相关信息和建议的操作 in this Microsoft documentation。
基本上,您需要包装 .Read
操作并检查读取的长度与预期长度,因为操作现在可能 return 在读取完整长度之前。您的代码可能如下所示(基于文档中的示例):
int totalRead = 0;
var buffer = new byte[bytesToRead];
while (totalRead < buffer.Length)
{
int bytesRead = zipStream.Read(buffer.Slice(totalRead));
if (bytesRead == 0) break;
totalRead += bytesRead;
}