为什么 CoreRT 编译的程序无法处理 ZIP 文件?

Question

我写了以下简单的程序来测试：

using System;
using System.IO;
using System.IO.Compression;
namespace HelloZip
{
class Program
{
static void Main(string[] args)
{
string path = Path.Combine(AppContext.BaseDirectory, "test.zip");
using (ZipArchive z = ZipFile.Open(path, ZipArchiveMode.Create))
{
var f = z.CreateEntry("hello.txt");
using (StreamWriter writer = new StreamWriter(f.Open()))
{
writer.Write("Hello World!");
}
}
}
}
}

根据此页面，我从 HelloZip 项目目录中运行了dotnet new nuget，在 nuget.config 中添加了推荐的包源，然后运行以下命令：

dotnet add package Microsoft.DotNet.ILCompiler -v 1.0.0-alpha-*
dotnet publish -r win-x64 -c release -o out
outHelloZip.exe

我收到以下错误：

Unhandled Exception: System.IO.Compression.ZLibException: The underlying compression routine could not be loaded correctly. ---> System.DllNotFoundException: Unable to load DLL 'clrcompression.dll': The specified module could not be found.
at HelloZip!<BaseAddress>+0x1199e7
at HelloZip!<BaseAddress>+0x119904
at Interop.zlib.DeflateInit2_(ZLibNative.ZStream&, ZLibNative.CompressionLevel, ZLibNative.CompressionMethod, Int32, Int32, ZLibNative.CompressionStrategy) + 0x48
at System.IO.Compression.ZLibNative.ZLibStreamHandle.DeflateInit2_(ZLibNative.CompressionLevel, Int32, Int32, ZLibNative.CompressionStrategy) + 0x4f
at System.IO.Compression.Deflater.DeflateInit(ZLibNative.CompressionLevel, Int32, Int32, ZLibNative.CompressionStrategy) + 0x59
--- End of inner exception stack trace ---
at System.IO.Compression.Deflater.DeflateInit(ZLibNative.CompressionLevel, Int32, Int32, ZLibNative.CompressionStrategy) + 0x1db
at System.IO.Compression.Deflater..ctor(CompressionLevel, Int32) + 0x50
at System.IO.Compression.DeflateStream.InitializeDeflater(Stream, Boolean, Int32, CompressionLevel) + 0x39
at System.IO.Compression.ZipArchiveEntry.GetDataCompressor(Stream, Boolean, EventHandler) + 0x4b
at System.IO.Compression.ZipArchiveEntry.OpenInWriteMode() + 0x65
at HelloZip.Program.Main(String[]) + 0x75
at HelloZip!<BaseAddress>+0x1716a2

是我犯了一个错误，还是AOT编译器还没有正确支持System.IO.Compress？

Answer 1

您遇到了一个已知的未实现功能。解决方法是现在手动复制 clrcompression.dll旁边的已编译可执行文件。在此处查看详细信息：https://github.com/dotnet/corert/issues/5496