.NET Core 3.1 / .NET 5 的 TikaOnDotNet 失败，方法未找到：'Void System.IO.FileStream..ctor

Question

对于 .NET Core 3.1 和 .NET 5，我尝试引用 TikaOnDotNet NuGet 包。

示例代码如下

using System;
using System.IO;
using TikaOnDotNet.TextExtraction;

    namespace tika
    {
        class Program
        {
            static void Main(string[] args)
            {
    
                var textExtractor = new TextExtractor();
    
                var original = new FileInfo(Path.Combine(Directory.GetCurrentDirectory(), @"pptexamples.ppt"));
    
                var wordDocContents = textExtractor.Extract(original.FullName);
    
            }
        }
    }

在 textExtractor.Extract 方法中抛出以下异常。

TikaOnDotNet.TextExtraction.TextExtractionException: "Extraction of text from the file '/Users/serhatonal/Projects/tika/tika/bin/Debug/netcoreapp3.1/pptexamples.ppt' failed." ---> TikaOnDotNet.TextExtraction.TextExtractionException: "Extraction failed." ---> System.MissingMethodException: "Method not found: 'Void System.IO.FileStream..ctor(System.String, System.IO.FileMode, System.Security.AccessControl.FileSystemRights, System.IO.FileShare, Int32, System.IO.FileOptions)'."
  at Java_java_io_FileDescriptor.open(String name, FileMode fileMode, FileAccess fileAccess)
  at java.io.FileDescriptor.open(String , FileMode , FileAccess )
  at java.io.FileDescriptor.open(String , Int32 , Int32 )
  at java.io.FileDescriptor.openReadOnly(String )
  at Java_java_io_RandomAccessFile.open0(Object _this, String name, Int32 mode, FileDescriptor fd, Int32 O_RDWR)
  at java.io.RandomAccessFile.open0(String , Int32 )
  at java.io.RandomAccessFile.open(String , Int32 )
  at java.io.RandomAccessFile..ctor(File file, String mode)
  at java.util.zip.ZipFile..ctor(File file, Int32 mode, Charset charset)
  at java.util.zip.ZipFile..ctor(File file, Int32 mode)
  at java.util.jar.JarFile..ctor(File file, Boolean verify, Int32 mode)
  at java.util.jar.JarFile..ctor(String name)
  at IKVM.NativeCode.ikvm.runtime.AssemblyClassLoader.lazyDefinePackages(ClassLoader _this)
  at ikvm.runtime.AssemblyClassLoader.lazyDefinePackages()
  at ikvm.runtime.AssemblyClassLoader.lazyDefinePackagesCheck()
  at ikvm.runtime.AssemblyClassLoader.getPackage(String name)
  at java.lang.Package.getPackage(Class )
  at java.lang.Class.getPackage()
  at org.apache.tika.mime.MimeTypesFactory.create(String coreFilePath, String extensionFilePath, ClassLoader classLoader)
  at org.apache.tika.mime.MimeTypes.getDefaultMimeTypes(ClassLoader classLoader)
  at org.apache.tika.config.TikaConfig.getDefaultMimeTypes(ClassLoader )
  at org.apache.tika.config.TikaConfig..ctor()
  at org.apache.tika.config.TikaConfig.getDefaultConfig()
  at org.apache.tika.parser.AutoDetectParser..ctor()
  at TikaOnDotNet.TextExtraction.Stream.StreamTextExtractor.Extract(Func`2 streamFactory, Stream outputStream)
  --- End of inner exception stack trace ---
  at TikaOnDotNet.TextExtraction.Stream.StreamTextExtractor.Extract(Func`2 streamFactory, Stream outputStream)
  at TikaOnDotNet.TextExtraction.TextExtractor.Extract[TExtractionResult](Func`2 streamFactory, Func`3 extractionResultAssembler)
  at TikaOnDotNet.TextExtraction.TextExtractor.Extract[TExtractionResult](String filePath, Func`3 extractionResultAssembler)
  --- End of inner exception stack trace ---
  at TikaOnDotNet.TextExtraction.TextExtractor.Extract[TExtractionResult](String filePath, Func`3 extractionResultAssembler)
  at TikaOnDotNet.TextExtraction.TextExtractor.Extract(String filePath)
  at tika.Program.Main(String[] args) in /Users/serhatonal/Projects/tika/tika/Program.cs:16

尽管我发现了这个问题 "System.MissingMethodException: "Method not found: 'Void System.IO.FileStream..ctor(System.String, System.IO.FileMode, System.Security.AccessControl.FileSystemRights, System.IO.FileShare, Int32, System.IO.FileOptions)'.""" 被认为已在 .NET 5 中修复根据以下问题发布。但是问题依旧。

https://github.com/dotnet/runtime/issues/30435

有人遇到同样的问题吗？

Answer 1

IMVM the basis of the library, as this is a java port, is not dotnet core compatible.

https://github.com/KevM/tikaondotnet/issues/136#issuecomment-583695410

不幸的是，这就是原因。

.NET Core 3.1 / .NET 5 的 TikaOnDotNet 失败，方法未找到：'Void System.IO.FileStream..ctor

TikaOnDotNet with .NET Core 3.1 / .NET 5 fails with Method not found: 'Void System.IO.FileStream..ctor

ikvm

apache-tika

.net-5