Apache VFS2 Uristyle-根绝对路径以双重斜线结束



在使用我注意到的VFS2库上工作时,我必须启用vfs.seturistyle(true),以便库将工作目录更改为目标文件的父级目录我正在操作(CWD DirectoryName)。

但是,如果启用了uristyle,则一切都与根相关。如果根不是"//".

),那不是问题

类GenericFileName将根的绝对编号设置为"/",这使方法getPath()返回"/" getUritrailer(),在root的情况下总是返回"//"。与//相对解决的所有内容都有两个点通往他们的道路。

这意味着如果我执行以下代码:

public class RemoteFileTest {
public static void main(String[] args) {
    // Options for a RemoteFileObject connection
    VFS.setUriStyle(true);
    FileSystemOptions options = new FileSystemOptions();
    // we doing an ftp connection, hence we use the ftpConfigBuilder
    // we want to work in passive mode
    FtpFileSystemConfigBuilder.getInstance().setPassiveMode(options, true);
    FtpFileSystemConfigBuilder.getInstance().setUserDirIsRoot(options, false);
    // DefaultFileSystemConfigBuilder.getInstance().setRootURI(options, "/newRoot/");
    // System.out.println(DefaultFileSystemConfigBuilder.getInstance().getRootURI(options));
    // ftp://localhost:21/
    StaticUserAuthenticator auth = new StaticUserAuthenticator("", "user", "pass");
    try {
        DefaultFileSystemConfigBuilder.getInstance().setUserAuthenticator(options, auth);
    } catch (FileSystemException e) {
        e.printStackTrace();
        return;
    }
    // A FileSystemManager creates an abstract FileObject linked to are desired RemoteFile.
    // That link is just simulated and not yet real.
    FileSystemManager manager;
    try {
        manager = VFS.getManager();
    } catch (FileSystemException e) {
        e.printStackTrace();
        return;
    }
    try (FileObject remoteFile = manager.resolveFile("ftp://localhost:21/sub_folder/test.txt", options)) {
        System.out.println("Is Folder " + remoteFile.isFolder());
        System.out.println("Is File " + remoteFile.isFile());
    } catch (FileSystemException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
        return;
    }
}}

我接收与FTP服务器的交互:

USER user
PASS ****
TYPE I
CWD //
SYST
PASV
LIST ..sub_folder/
PWD
CWD ..sub_folder/

我希望这种交互是这样的,但是没有目录的两个点。

亲切的问候Barry

如下所述修复了它:

再次禁用Uristyle。写了我自己的VFS课程,该课程创建了我的自定义书面经理。该经理用我的自定义覆盖FTPFileProvider,这简单地将根部设置为自定义选择的行为,这会导致所需的行为。

import org.apache.commons.vfs2.FileName;
import org.apache.commons.vfs2.FileObject;
import org.apache.commons.vfs2.FileSystem;
import org.apache.commons.vfs2.FileSystemException;
import org.apache.commons.vfs2.FileSystemOptions;
import org.apache.commons.vfs2.impl.DefaultFileSystemConfigBuilder;
import org.apache.commons.vfs2.provider.ftp.FtpFileProvider;
public class AdvancedFtpFileProvider extends FtpFileProvider {
    public AdvancedFtpFileProvider() {
        super();
        // setFileNameParser(AdvancedFtpFileNameParser.getInstance());
    }
    @Override
    protected FileObject findFile(FileName name, FileSystemOptions fileSystemOptions) throws FileSystemException {
        // Check in the cache for the file system
        //getContext().getFileSystemManager().resolveName... resolves the configured RootUri relative to the selected root (name.getRoot()). This calls cwd to the selectedRoot and operates from there with relatives urls towards the new root!
        final FileName rootName = getContext().getFileSystemManager().resolveName(name.getRoot(), DefaultFileSystemConfigBuilder.getInstance().getRootURI(fileSystemOptions));
        final FileSystem fs = getFileSystem(rootName, fileSystemOptions);
        // Locate the file
        // return fs.resolveFile(name.getPath());
        return fs.resolveFile(name);
    }
}

遇到了这个问题,因为我在以下问题上遇到了同样的问题

ftp://user:pass@host//home/user/file.txt

成为...(请注意"家"之后的单斜线)

ftp://user:pass@host/home/user/file.txt

我这样做是为了解决问题...

// Setup some options, add as many as you need    
FileSystemOptions opts = new FileSystemOptions( );
// This line tells VFS to treat the URI as the absolute path and not relative
FtpsFileSystemConfigBuilder.getInstance( ).setUserDirIsRoot( opts, false );
// Retrieve the file from the remote FTP server    
FileObject realFileObject = fileSystemManager.resolveFile( fileSystemUri, opts );

我希望这可以帮助某人,如果没有,那么下次这会给我带来参考。

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