Apache Mina SSHD - FileZilla 显示错误的目录结构

【问题标题】：Apache Mina SSHD - FileZilla shows wrong directory structureApache Mina SSHD - FileZilla 显示错误的目录结构
【发布时间】：2016-04-11 15:17:18
【问题描述】：

我使用 Apache Mina SSHD 将 SSH 服务器设置为 SFTP 服务器。我实现了自己的FileSystemFactory，以便为登录的用户创建特定的目录。当我使用 FileZilla 打开与服务器的连接时，目录结构显示错误。

在根目录视图中，会显示一个空文件夹。这个不存在。应该只有两个目录。 “上传”和“下载”。

当我打开上传目录时，我再次看到一个不应显示的空目录，因为它不存在。此外，还显示了另一个上传目录。我无法打开它，因为它说 /upload/upload 不存在，这是真的，但我不知道为什么会显示它。

当我连接 WinSCP 时，我没有收到此显示错误。有谁知道它为什么会发生或如何解决？

编辑：

FileSystemFactory 实现：

public class CustomFileSystemFactory implements FileSystemFactory {
  private String defaultHomeDir;
  private FileSystem fileSystem;

  public CustomFileSystemFactory(String defaultHomeDir){
    this.defaultHomeDir = defaultHomeDir;
  }

  public String getDefaultHome(){
    return defaultHomeDir;
  }

  public FileSystem getFileSystem(){
    return fileSystem;
  }

  @Override
  public FileSystem createFileSystem(Session session) throws IOException {
    Path dir = computeRootDir(session.getUsername());
    if (dir == null) {
      throw new InvalidPathException(session.getUsername(), "Cannot resolve home directory");
    }

    if(!Files.exists(dir)){
      Files.createDirectory(dir);
    }
    setupFolders(session.getUsername());
    FileSystem fileSystem = new RootedFileSystemProvider().newFileSystem(dir, Collections.emptyMap());
    return fileSystem;
  }

  protected Path computeRootDir(String username){
    Path path = Paths.get(defaultHomeDir + Utils.getPrincipalExtId(username) + "/");
    return path;
  }

  protected void setupFolders(String username) throws IOException {
    Path homeDir = computeRootDir(username);
    File uploadFolder = new File(homeDir + "/upload/");
    File downloadFolder = new File(homeDir + "/download/");
    if(!uploadFolder.exists()){
      uploadFolder.mkdirs();
    }
    if(!downloadFolder.exists()){
      downloadFolder.mkdirs();
    }
  }
}

这是调试级别 2 上的 WinSCP 日志：

. 2016-01-07 14:46:46.909 Listing directory "/".
> 2016-01-07 14:46:46.909 Type: SSH_FXP_OPENDIR, Size: 10, Number: 4107
> 2016-01-07 14:46:46.909 0B,00,00,10,0B,00,00,00,01,2F,
. 2016-01-07 14:46:46.909 Sent 14 bytes
. 2016-01-07 14:46:46.909 There are 0 bytes remaining in the send buffer
. 2016-01-07 14:46:46.909 Looking for network events
. 2016-01-07 14:46:46.909 Timeout waiting for network events
. 2016-01-07 14:46:46.909 Waiting for another 4 bytes
. 2016-01-07 14:46:46.909 Looking for incoming data
. 2016-01-07 14:46:46.909 Looking for network events
. 2016-01-07 14:46:46.913 Detected network event
. 2016-01-07 14:46:46.913 Enumerating network events for socket 1084
. 2016-01-07 14:46:46.913 Enumerated 1 network events making 1 cumulative events for socket 1084
. 2016-01-07 14:46:46.913 Handling network read event on socket 1084 with error 0
. 2016-01-07 14:46:46.913 Received 45 bytes (0)
. 2016-01-07 14:46:46.913 Read 4 bytes (41 pending)
. 2016-01-07 14:46:46.913 Read 41 bytes (0 pending)
< 2016-01-07 14:46:46.913 Type: SSH_FXP_HANDLE, Size: 41, Number: 4107
< 2016-01-07 14:46:46.913 66,00,00,10,0B,00,00,00,20,34,34,30,63,33,34,36,32,62,30,34,65,39,37,32,61,
< 2016-01-07 14:46:46.913 34,39,34,62,62,31,30,64,36,65,62,61,35,65,61,33,
> 2016-01-07 14:46:46.913 Type: SSH_FXP_READDIR, Size: 41, Number: 4364
> 2016-01-07 14:46:46.913 0C,00,00,11,0C,00,00,00,20,34,34,30,63,33,34,36,32,62,30,34,65,39,37,32,61,
> 2016-01-07 14:46:46.913 34,39,34,62,62,31,30,64,36,65,62,61,35,65,61,33,
. 2016-01-07 14:46:46.913 Sent 45 bytes
. 2016-01-07 14:46:46.914 There are 0 bytes remaining in the send buffer
. 2016-01-07 14:46:46.914 Looking for network events
. 2016-01-07 14:46:46.914 Timeout waiting for network events
. 2016-01-07 14:46:46.914 Waiting for another 4 bytes
. 2016-01-07 14:46:46.914 Looking for incoming data
. 2016-01-07 14:46:46.914 Looking for network events
. 2016-01-07 14:46:46.924 Detected network event
. 2016-01-07 14:46:46.924 Enumerating network events for socket 1084
. 2016-01-07 14:46:46.924 Enumerated 1 network events making 1 cumulative events for socket 1084
. 2016-01-07 14:46:46.924 Handling network read event on socket 1084 with error 0
. 2016-01-07 14:46:46.925 Received 1113 bytes (0)
. 2016-01-07 14:46:46.925 Read 4 bytes (1109 pending)
. 2016-01-07 14:46:46.925 Read 1109 bytes (0 pending)
< 2016-01-07 14:46:46.925 Type: SSH_FXP_NAME, Size: 1109, Number: 4364
< 2016-01-07 14:46:46.925 68,00,00,11,0C,00,00,00,03,00,00,00,01,2E,00,00,00,7C,02,00,00,41,B6,00,00,
< 2016-01-07 14:46:46.925 00,00,56,79,11,96,00,00,00,00,56,79,11,96,00,00,00,00,56,79,11,96,00,00,01,
< 2016-01-07 14:46:46.925 37,00,00,00,07,00,00,00,00,00,00,00,00,00,1F,01,FF,00,00,00,1C,56,4F,52,44,
< 2016-01-07 14:46:46.925 45,46,49,4E,49,45,52,54,5C,41,64,6D,69,6E,69,73,74,72,61,74,6F,72,65,6E,00,
< 2016-01-07 14:46:46.925 00,00,00,00,00,00,0B,00,00,00,00,00,00,00,1C,56,4F,52,44,45,46,49,4E,49,45,
< 2016-01-07 14:46:46.925 52,54,5C,41,64,6D,69,6E,69,73,74,72,61,74,6F,72,65,6E,00,00,00,00,00,00,00,
< 2016-01-07 14:46:46.925 00,00,1F,01,FF,00,00,00,14,4E,54,2D,41,55,54,4F,52,49,54,C3,84,54,5C,53,59,
< 2016-01-07 14:46:46.925 53,54,45,4D,00,00,00,00,00,00,00,0B,00,00,00,00,00,00,00,14,4E,54,2D,41,55,
< 2016-01-07 14:46:46.925 54,4F,52,49,54,C3,84,54,5C,53,59,53,54,45,4D,00,00,00,00,00,00,00,03,00,12,
< 2016-01-07 14:46:46.925 00,A9,00,00,00,15,56,4F,52,44,45,46,49,4E,49,45,52,54,5C,42,65,6E,75,74,7A,
< 2016-01-07 14:46:46.925 65,72,00,00,00,00,00,00,00,00,00,13,01,BF,00,00,00,27,4E,54,2D,41,55,54,4F,
< 2016-01-07 14:46:46.925 52,49,54,C3,84,54,5C,41,75,74,68,65,6E,74,69,66,69,7A,69,65,72,74,65,20,42,
< 2016-01-07 14:46:46.925 65,6E,75,74,7A,65,72,00,00,00,00,00,00,00,0B,00,01,00,00,00,00,00,27,4E,54,
< 2016-01-07 14:46:46.925 2D,41,55,54,4F,52,49,54,C3,84,54,5C,41,75,74,68,65,6E,74,69,66,69,7A,69,65,
< 2016-01-07 14:46:46.925 72,74,65,20,42,65,6E,75,74,7A,65,72,00,00,00,08,64,6F,77,6E,6C,6F,61,64,00,
< 2016-01-07 14:46:46.925 00,00,7C,02,00,00,41,B6,00,00,00,00,56,8E,52,55,00,00,00,00,56,8E,52,55,00,
< 2016-01-07 14:46:46.925 00,00,00,56,8E,52,55,00,00,01,54,00,00,00,08,00,00,00,00,00,00,00,03,00,1F,
< 2016-01-07 14:46:46.925 01,FF,00,00,00,0D,44,55,53,5C,6E,6D,65,63,6B,6D,61,6E,6E,00,00,00,00,00,00,
< 2016-01-07 14:46:46.925 00,00,00,1F,01,FF,00,00,00,1C,56,4F,52,44,45,46,49,4E,49,45,52,54,5C,41,64,
< 2016-01-07 14:46:46.925 6D,69,6E,69,73,74,72,61,74,6F,72,65,6E,00,00,00,00,00,00,00,0B,00,00,00,00,
< 2016-01-07 14:46:46.925 00,00,00,1C,56,4F,52,44,45,46,49,4E,49,45,52,54,5C,41,64,6D,69,6E,69,73,74,
< 2016-01-07 14:46:46.925 72,61,74,6F,72,65,6E,00,00,00,00,00,00,00,00,00,1F,01,FF,00,00,00,14,4E,54,
< 2016-01-07 14:46:46.925 2D,41,55,54,4F,52,49,54,C3,84,54,5C,53,59,53,54,45,4D,00,00,00,00,00,00,00,
< 2016-01-07 14:46:46.925 0B,00,00,00,00,00,00,00,14,4E,54,2D,41,55,54,4F,52,49,54,C3,84,54,5C,53,59,
< 2016-01-07 14:46:46.925 53,54,45,4D,00,00,00,00,00,00,00,03,00,12,00,A9,00,00,00,15,56,4F,52,44,45,
< 2016-01-07 14:46:46.925 46,49,4E,49,45,52,54,5C,42,65,6E,75,74,7A,65,72,00,00,00,00,00,00,00,00,00,
< 2016-01-07 14:46:46.925 13,01,BF,00,00,00,27,4E,54,2D,41,55,54,4F,52,49,54,C3,84,54,5C,41,75,74,68,
< 2016-01-07 14:46:46.925 65,6E,74,69,66,69,7A,69,65,72,74,65,20,42,65,6E,75,74,7A,65,72,00,00,00,00,
< 2016-01-07 14:46:46.925 00,00,00,0B,00,01,00,00,00,00,00,27,4E,54,2D,41,55,54,4F,52,49,54,C3,84,54,
< 2016-01-07 14:46:46.925 5C,41,75,74,68,65,6E,74,69,66,69,7A,69,65,72,74,65,20,42,65,6E,75,74,7A,65,
< 2016-01-07 14:46:46.925 72,00,00,00,06,75,70,6C,6F,61,64,00,00,00,7C,02,00,00,41,B6,00,00,00,00,56,
< 2016-01-07 14:46:46.925 8E,51,ED,00,00,00,00,56,8E,51,ED,00,00,00,00,56,8E,51,ED,00,00,01,37,00,00,
< 2016-01-07 14:46:46.925 00,07,00,00,00,00,00,00,00,00,00,1F,01,FF,00,00,00,1C,56,4F,52,44,45,46,49,
< 2016-01-07 14:46:46.925 4E,49,45,52,54,5C,41,64,6D,69,6E,69,73,74,72,61,74,6F,72,65,6E,00,00,00,00,
< 2016-01-07 14:46:46.925 00,00,00,0B,00,00,00,00,00,00,00,1C,56,4F,52,44,45,46,49,4E,49,45,52,54,5C,
< 2016-01-07 14:46:46.925 41,64,6D,69,6E,69,73,74,72,61,74,6F,72,65,6E,00,00,00,00,00,00,00,00,00,1F,
< 2016-01-07 14:46:46.925 01,FF,00,00,00,14,4E,54,2D,41,55,54,4F,52,49,54,C3,84,54,5C,53,59,53,54,45,
< 2016-01-07 14:46:46.925 4D,00,00,00,00,00,00,00,0B,00,00,00,00,00,00,00,14,4E,54,2D,41,55,54,4F,52,
< 2016-01-07 14:46:46.925 49,54,C3,84,54,5C,53,59,53,54,45,4D,00,00,00,00,00,00,00,03,00,12,00,A9,00,
< 2016-01-07 14:46:46.925 00,00,15,56,4F,52,44,45,46,49,4E,49,45,52,54,5C,42,65,6E,75,74,7A,65,72,00,
< 2016-01-07 14:46:46.925 00,00,00,00,00,00,00,00,13,01,BF,00,00,00,27,4E,54,2D,41,55,54,4F,52,49,54,
< 2016-01-07 14:46:46.925 C3,84,54,5C,41,75,74,68,65,6E,74,69,66,69,7A,69,65,72,74,65,20,42,65,6E,75,
< 2016-01-07 14:46:46.925 74,7A,65,72,00,00,00,00,00,00,00,0B,00,01,00,00,00,00,00,27,4E,54,2D,41,55,
< 2016-01-07 14:46:46.926 54,4F,52,49,54,C3,84,54,5C,41,75,74,68,65,6E,74,69,66,69,7A,69,65,72,74,65,
< 2016-01-07 14:46:46.926 20,42,65,6E,75,74,7A,65,72,
> 2016-01-07 14:46:46.926 Type: SSH_FXP_READDIR, Size: 41, Number: 4620
> 2016-01-07 14:46:46.926 0C,00,00,12,0C,00,00,00,20,34,34,30,63,33,34,36,32,62,30,34,65,39,37,32,61,
> 2016-01-07 14:46:46.926 34,39,34,62,62,31,30,64,36,65,62,61,35,65,61,33,
. 2016-01-07 14:46:46.926 Sent 45 bytes
. 2016-01-07 14:46:46.926 There are 0 bytes remaining in the send buffer
. 2016-01-07 14:46:46.926 Looking for network events
. 2016-01-07 14:46:46.926 Timeout waiting for network events
. 2016-01-07 14:46:46.926 Read file '.' from listing
. 2016-01-07 14:46:46.926 Read file 'download' from listing
. 2016-01-07 14:46:46.926 Read file 'upload' from listing
. 2016-01-07 14:46:46.926 Waiting for another 4 bytes
. 2016-01-07 14:46:46.926 Looking for incoming data
. 2016-01-07 14:46:46.926 Looking for network events
. 2016-01-07 14:46:46.926 Detected network event
. 2016-01-07 14:46:46.926 Enumerating network events for socket 1084
. 2016-01-07 14:46:46.926 Enumerated 1 network events making 1 cumulative events for socket 1084
. 2016-01-07 14:46:46.926 Handling network read event on socket 1084 with error 0
. 2016-01-07 14:46:46.926 Received 46 bytes (0)
. 2016-01-07 14:46:46.926 Read 4 bytes (42 pending)
. 2016-01-07 14:46:46.926 Read 42 bytes (0 pending)
< 2016-01-07 14:46:46.926 Type: SSH_FXP_STATUS, Size: 42, Number: 4620
< 2016-01-07 14:46:46.926 65,00,00,12,0C,00,00,00,01,00,00,00,19,44,69,72,65,63,74,6F,72,79,20,72,65,
< 2016-01-07 14:46:46.926 61,64,69,6E,67,20,69,73,20,64,6F,6E,65,00,00,00,00,
< 2016-01-07 14:46:46.926 Status code: 1
> 2016-01-07 14:46:46.926 Type: SSH_FXP_CLOSE, Size: 41, Number: 4868
> 2016-01-07 14:46:46.926 04,00,00,13,04,00,00,00,20,34,34,30,63,33,34,36,32,62,30,34,65,39,37,32,61,
> 2016-01-07 14:46:46.926 34,39,34,62,62,31,30,64,36,65,62,61,35,65,61,33,
. 2016-01-07 14:46:46.926 Sent 45 bytes
. 2016-01-07 14:46:46.926 There are 0 bytes remaining in the send buffer
. 2016-01-07 14:46:46.926 Looking for network events
. 2016-01-07 14:46:46.926 Timeout waiting for network events
. 2016-01-07 14:46:46.927 download;D;0;2016-01-07T11:56:05.000Z;"" [0];"" [0];rw-rw-rw-;1
. 2016-01-07 14:46:46.927 upload;D;0;2016-01-07T11:54:21.000Z;"" [0];"" [0];rw-rw-rw-;1
. 2016-01-07 14:46:47.009 Startup conversation with host finished.
. 2016-01-07 14:46:47.122 Session upkeep
. 2016-01-07 14:46:47.122 Looking for network events
. 2016-01-07 14:46:47.122 Detected network event
. 2016-01-07 14:46:47.122 Enumerating network events for socket 1084
. 2016-01-07 14:46:47.122 Enumerated 1 network events making 1 cumulative events for socket 1084
. 2016-01-07 14:46:47.122 Handling network read event on socket 1084 with error 0
. 2016-01-07 14:46:47.122 Received 21 bytes (0)
. 2016-01-07 14:46:47.124 Session upkeep
. 2016-01-07 14:46:47.124 Looking for network events
. 2016-01-07 14:46:47.124 Timeout waiting for network events
. 2016-01-07 14:46:47.257 Session upkeep
. 2016-01-07 14:46:47.257 Looking for network events
. 2016-01-07 14:46:47.257 Timeout waiting for network events
. 2016-01-07 14:46:47.768 Session upkeep
. 2016-01-07 14:46:47.768 Looking for network events
. 2016-01-07 14:46:47.768 Timeout waiting for network events
. 2016-01-07 14:46:48.267 Session upkeep
. 2016-01-07 14:46:48.267 Looking for network events
. 2016-01-07 14:46:48.267 Timeout waiting for network events
. 2016-01-07 14:46:48.781 Session upkeep
. 2016-01-07 14:46:48.782 Looking for network events
. 2016-01-07 14:46:48.782 Timeout waiting for network events
. 2016-01-07 14:46:48.832 Cached directory change via "download" to "/download".
. 2016-01-07 14:46:48.832 Getting current directory name.
. 2016-01-07 14:46:48.832 Listing directory "/download".
> 2016-01-07 14:46:48.832 Type: SSH_FXP_OPENDIR, Size: 18, Number: 5131
> 2016-01-07 14:46:48.832 0B,00,00,14,0B,00,00,00,09,2F,64,6F,77,6E,6C,6F,61,64,
. 2016-01-07 14:46:48.832 Sent 22 bytes
. 2016-01-07 14:46:48.832 There are 0 bytes remaining in the send buffer
. 2016-01-07 14:46:48.832 Looking for network events
. 2016-01-07 14:46:48.834 Timeout waiting for network events
. 2016-01-07 14:46:48.834 Read 4 bytes (17 pending)
. 2016-01-07 14:46:48.834 Read 17 bytes (0 pending)
< 2016-01-07 14:46:48.834 Type: SSH_FXP_STATUS, Size: 17, Number: 4868
< 2016-01-07 14:46:48.834 65,00,00,13,04,00,00,00,00,00,00,00,00,00,00,00,00,
. 2016-01-07 14:46:48.834 Discarding reserved response
. 2016-01-07 14:46:48.834 Waiting for another 4 bytes
. 2016-01-07 14:46:48.834 Looking for incoming data
. 2016-01-07 14:46:48.834 Looking for network events
. 2016-01-07 14:46:48.834 Detected network event
. 2016-01-07 14:46:48.834 Enumerating network events for socket 1084
. 2016-01-07 14:46:48.834 Enumerated 1 network events making 1 cumulative events for socket 1084
. 2016-01-07 14:46:48.834 Handling network read event on socket 1084 with error 0
. 2016-01-07 14:46:48.834 Received 45 bytes (0)
. 2016-01-07 14:46:48.834 Read 4 bytes (41 pending)
. 2016-01-07 14:46:48.834 Read 41 bytes (0 pending)
< 2016-01-07 14:46:48.834 Type: SSH_FXP_HANDLE, Size: 41, Number: 5131
< 2016-01-07 14:46:48.834 66,00,00,14,0B,00,00,00,20,30,61,33,38,32,30,37,31,37,64,61,65,34,34,39,61,
< 2016-01-07 14:46:48.834 30,31,66,36,32,65,35,61,33,34,65,34,30,33,39,34,
> 2016-01-07 14:46:48.834 Type: SSH_FXP_READDIR, Size: 41, Number: 5388
> 2016-01-07 14:46:48.834 0C,00,00,15,0C,00,00,00,20,30,61,33,38,32,30,37,31,37,64,61,65,34,34,39,61,
> 2016-01-07 14:46:48.834 30,31,66,36,32,65,35,61,33,34,65,34,30,33,39,34,
. 2016-01-07 14:46:48.835 Sent 45 bytes
. 2016-01-07 14:46:48.835 There are 0 bytes remaining in the send buffer
. 2016-01-07 14:46:48.835 Looking for network events
. 2016-01-07 14:46:48.835 Timeout waiting for network events
. 2016-01-07 14:46:48.835 Waiting for another 4 bytes
. 2016-01-07 14:46:48.835 Looking for incoming data
. 2016-01-07 14:46:48.835 Looking for network events
. 2016-01-07 14:46:48.840 Detected network event
. 2016-01-07 14:46:48.840 Enumerating network events for socket 1084
. 2016-01-07 14:46:48.840 Enumerated 1 network events making 1 cumulative events for socket 1084
. 2016-01-07 14:46:48.840 Handling network read event on socket 1084 with error 0
. 2016-01-07 14:46:48.840 Received 749 bytes (0)
. 2016-01-07 14:46:48.840 Read 4 bytes (745 pending)
. 2016-01-07 14:46:48.840 Read 745 bytes (0 pending)
< 2016-01-07 14:46:48.840 Type: SSH_FXP_NAME, Size: 745, Number: 5388
< 2016-01-07 14:46:48.840 68,00,00,15,0C,00,00,00,02,00,00,00,01,2E,00,00,00,7C,02,00,00,41,B6,00,00,
< 2016-01-07 14:46:48.840 00,00,56,8E,52,55,00,00,00,00,56,8E,52,55,00,00,00,00,56,8E,52,55,00,00,01,
< 2016-01-07 14:46:48.840 54,00,00,00,08,00,00,00,00,00,00,00,03,00,1F,01,FF,00,00,00,0D,44,55,53,5C,
< 2016-01-07 14:46:48.840 6E,6D,65,63,6B,6D,61,6E,6E,00,00,00,00,00,00,00,00,00,1F,01,FF,00,00,00,1C,
< 2016-01-07 14:46:48.840 56,4F,52,44,45,46,49,4E,49,45,52,54,5C,41,64,6D,69,6E,69,73,74,72,61,74,6F,
< 2016-01-07 14:46:48.840 72,65,6E,00,00,00,00,00,00,00,0B,00,00,00,00,00,00,00,1C,56,4F,52,44,45,46,
< 2016-01-07 14:46:48.840 49,4E,49,45,52,54,5C,41,64,6D,69,6E,69,73,74,72,61,74,6F,72,65,6E,00,00,00,
< 2016-01-07 14:46:48.840 00,00,00,00,00,00,1F,01,FF,00,00,00,14,4E,54,2D,41,55,54,4F,52,49,54,C3,84,
< 2016-01-07 14:46:48.840 54,5C,53,59,53,54,45,4D,00,00,00,00,00,00,00,0B,00,00,00,00,00,00,00,14,4E,
< 2016-01-07 14:46:48.840 54,2D,41,55,54,4F,52,49,54,C3,84,54,5C,53,59,53,54,45,4D,00,00,00,00,00,00,
< 2016-01-07 14:46:48.840 00,03,00,12,00,A9,00,00,00,15,56,4F,52,44,45,46,49,4E,49,45,52,54,5C,42,65,
< 2016-01-07 14:46:48.840 6E,75,74,7A,65,72,00,00,00,00,00,00,00,00,00,13,01,BF,00,00,00,27,4E,54,2D,
< 2016-01-07 14:46:48.840 41,55,54,4F,52,49,54,C3,84,54,5C,41,75,74,68,65,6E,74,69,66,69,7A,69,65,72,
< 2016-01-07 14:46:48.840 74,65,20,42,65,6E,75,74,7A,65,72,00,00,00,00,00,00,00,0B,00,01,00,00,00,00,
< 2016-01-07 14:46:48.840 00,27,4E,54,2D,41,55,54,4F,52,49,54,C3,84,54,5C,41,75,74,68,65,6E,74,69,66,
< 2016-01-07 14:46:48.840 69,7A,69,65,72,74,65,20,42,65,6E,75,74,7A,65,72,00,00,00,02,2E,2E,00,00,00,
< 2016-01-07 14:46:48.840 7C,02,00,00,41,B6,00,00,00,00,56,79,11,96,00,00,00,00,56,79,11,96,00,00,00,
< 2016-01-07 14:46:48.840 00,56,79,11,96,00,00,01,37,00,00,00,07,00,00,00,00,00,00,00,00,00,1F,01,FF,
< 2016-01-07 14:46:48.840 00,00,00,1C,56,4F,52,44,45,46,49,4E,49,45,52,54,5C,41,64,6D,69,6E,69,73,74,
< 2016-01-07 14:46:48.840 72,61,74,6F,72,65,6E,00,00,00,00,00,00,00,0B,00,00,00,00,00,00,00,1C,56,4F,
< 2016-01-07 14:46:48.840 52,44,45,46,49,4E,49,45,52,54,5C,41,64,6D,69,6E,69,73,74,72,61,74,6F,72,65,
< 2016-01-07 14:46:48.840 6E,00,00,00,00,00,00,00,00,00,1F,01,FF,00,00,00,14,4E,54,2D,41,55,54,4F,52,
< 2016-01-07 14:46:48.840 49,54,C3,84,54,5C,53,59,53,54,45,4D,00,00,00,00,00,00,00,0B,00,00,00,00,00,
< 2016-01-07 14:46:48.840 00,00,14,4E,54,2D,41,55,54,4F,52,49,54,C3,84,54,5C,53,59,53,54,45,4D,00,00,
< 2016-01-07 14:46:48.840 00,00,00,00,00,03,00,12,00,A9,00,00,00,15,56,4F,52,44,45,46,49,4E,49,45,52,
< 2016-01-07 14:46:48.840 54,5C,42,65,6E,75,74,7A,65,72,00,00,00,00,00,00,00,00,00,13,01,BF,00,00,00,
< 2016-01-07 14:46:48.840 27,4E,54,2D,41,55,54,4F,52,49,54,C3,84,54,5C,41,75,74,68,65,6E,74,69,66,69,
< 2016-01-07 14:46:48.840 7A,69,65,72,74,65,20,42,65,6E,75,74,7A,65,72,00,00,00,00,00,00,00,0B,00,01,
< 2016-01-07 14:46:48.840 00,00,00,00,00,27,4E,54,2D,41,55,54,4F,52,49,54,C3,84,54,5C,41,75,74,68,65,
< 2016-01-07 14:46:48.841 6E,74,69,66,69,7A,69,65,72,74,65,20,42,65,6E,75,74,7A,65,72,
> 2016-01-07 14:46:48.841 Type: SSH_FXP_READDIR, Size: 41, Number: 5644
> 2016-01-07 14:46:48.841 0C,00,00,16,0C,00,00,00,20,30,61,33,38,32,30,37,31,37,64,61,65,34,34,39,61,
> 2016-01-07 14:46:48.841 30,31,66,36,32,65,35,61,33,34,65,34,30,33,39,34,
. 2016-01-07 14:46:48.841 Sent 45 bytes
. 2016-01-07 14:46:48.841 There are 0 bytes remaining in the send buffer
. 2016-01-07 14:46:48.841 Looking for network events
. 2016-01-07 14:46:48.841 Timeout waiting for network events
. 2016-01-07 14:46:48.841 Read file '.' from listing
. 2016-01-07 14:46:48.841 Read file '..' from listing
. 2016-01-07 14:46:48.841 Waiting for another 4 bytes
. 2016-01-07 14:46:48.841 Looking for incoming data
. 2016-01-07 14:46:48.841 Looking for network events
. 2016-01-07 14:46:48.841 Detected network event
. 2016-01-07 14:46:48.841 Enumerating network events for socket 1084
. 2016-01-07 14:46:48.841 Enumerated 1 network events making 1 cumulative events for socket 1084
. 2016-01-07 14:46:48.841 Handling network read event on socket 1084 with error 0
. 2016-01-07 14:46:48.841 Received 46 bytes (0)
. 2016-01-07 14:46:48.841 Read 4 bytes (42 pending)
. 2016-01-07 14:46:48.841 Read 42 bytes (0 pending)
< 2016-01-07 14:46:48.841 Type: SSH_FXP_STATUS, Size: 42, Number: 5644
< 2016-01-07 14:46:48.841 65,00,00,16,0C,00,00,00,01,00,00,00,19,44,69,72,65,63,74,6F,72,79,20,72,65,
< 2016-01-07 14:46:48.841 61,64,69,6E,67,20,69,73,20,64,6F,6E,65,00,00,00,00,
< 2016-01-07 14:46:48.842 Status code: 1
> 2016-01-07 14:46:48.842 Type: SSH_FXP_CLOSE, Size: 41, Number: 5892
> 2016-01-07 14:46:48.842 04,00,00,17,04,00,00,00,20,30,61,33,38,32,30,37,31,37,64,61,65,34,34,39,61,
> 2016-01-07 14:46:48.842 30,31,66,36,32,65,35,61,33,34,65,34,30,33,39,34,
. 2016-01-07 14:46:48.842 Sent 45 bytes
. 2016-01-07 14:46:48.842 There are 0 bytes remaining in the send buffer
. 2016-01-07 14:46:48.842 Looking for network events
. 2016-01-07 14:46:48.842 Timeout waiting for network events
. 2016-01-07 14:46:48.842 ..;D;0;2015-12-22T09:02:14.000Z;"" [0];"" [0];rw-rw-rw-;1
. 2016-01-07 14:46:49.283 Session upkeep
. 2016-01-07 14:46:49.283 Looking for network events
. 2016-01-07 14:46:49.283 Detected network event
. 2016-01-07 14:46:49.283 Enumerating network events for socket 1084
. 2016-01-07 14:46:49.283 Enumerated 1 network events making 1 cumulative events for socket 1084
. 2016-01-07 14:46:49.283 Handling network read event on socket 1084 with error 0
. 2016-01-07 14:46:49.283 Received 21 bytes (0)
. 2016-01-07 14:46:49.472 Cached directory change via ".." to "/".
. 2016-01-07 14:46:49.472 Getting current directory name.
. 2016-01-07 14:46:49.473 Directory content loaded from cache.
. 2016-01-07 14:46:49.795 Session upkeep
. 2016-01-07 14:46:49.795 Looking for network events
. 2016-01-07 14:46:49.795 Timeout waiting for network events
. 2016-01-07 14:46:49.880 Cached directory change via "upload" to "/upload".
. 2016-01-07 14:46:49.880 Getting current directory name.
. 2016-01-07 14:46:49.881 Listing directory "/upload".
> 2016-01-07 14:46:49.881 Type: SSH_FXP_OPENDIR, Size: 16, Number: 6155
> 2016-01-07 14:46:49.881 0B,00,00,18,0B,00,00,00,07,2F,75,70,6C,6F,61,64,
. 2016-01-07 14:46:49.881 Sent 20 bytes
. 2016-01-07 14:46:49.881 There are 0 bytes remaining in the send buffer
. 2016-01-07 14:46:49.881 Looking for network events
. 2016-01-07 14:46:49.882 Timeout waiting for network events
. 2016-01-07 14:46:49.882 Read 4 bytes (17 pending)
. 2016-01-07 14:46:49.882 Read 17 bytes (0 pending)
< 2016-01-07 14:46:49.882 Type: SSH_FXP_STATUS, Size: 17, Number: 5892
< 2016-01-07 14:46:49.882 65,00,00,17,04,00,00,00,00,00,00,00,00,00,00,00,00,
. 2016-01-07 14:46:49.882 Discarding reserved response
. 2016-01-07 14:46:49.882 Waiting for another 4 bytes
. 2016-01-07 14:46:49.882 Looking for incoming data
. 2016-01-07 14:46:49.882 Looking for network events
. 2016-01-07 14:46:49.882 Detected network event
. 2016-01-07 14:46:49.882 Enumerating network events for socket 1084
. 2016-01-07 14:46:49.883 Enumerated 1 network events making 1 cumulative events for socket 1084
. 2016-01-07 14:46:49.883 Handling network read event on socket 1084 with error 0
. 2016-01-07 14:46:49.883 Received 45 bytes (0)
. 2016-01-07 14:46:49.883 Read 4 bytes (41 pending)
. 2016-01-07 14:46:49.883 Read 41 bytes (0 pending)
< 2016-01-07 14:46:49.883 Type: SSH_FXP_HANDLE, Size: 41, Number: 6155
< 2016-01-07 14:46:49.883 66,00,00,18,0B,00,00,00,20,30,38,61,36,35,34,38,66,61,36,39,63,66,31,64,37,
< 2016-01-07 14:46:49.883 65,31,33,34,32,33,63,32,61,30,32,30,35,33,63,37,
> 2016-01-07 14:46:49.883 Type: SSH_FXP_READDIR, Size: 41, Number: 6412
> 2016-01-07 14:46:49.883 0C,00,00,19,0C,00,00,00,20,30,38,61,36,35,34,38,66,61,36,39,63,66,31,64,37,
> 2016-01-07 14:46:49.883 65,31,33,34,32,33,63,32,61,30,32,30,35,33,63,37,
. 2016-01-07 14:46:49.883 Sent 45 bytes
. 2016-01-07 14:46:49.883 There are 0 bytes remaining in the send buffer
. 2016-01-07 14:46:49.883 Looking for network events
. 2016-01-07 14:46:49.883 Timeout waiting for network events
. 2016-01-07 14:46:49.883 Waiting for another 4 bytes
. 2016-01-07 14:46:49.883 Looking for incoming data
. 2016-01-07 14:46:49.883 Looking for network events
. 2016-01-07 14:46:49.889 Detected network event
. 2016-01-07 14:46:49.890 Enumerating network events for socket 1084
. 2016-01-07 14:46:49.890 Enumerated 1 network events making 1 cumulative events for socket 1084
. 2016-01-07 14:46:49.890 Handling network read event on socket 1084 with error 0
. 2016-01-07 14:46:49.890 Received 720 bytes (0)
. 2016-01-07 14:46:49.890 Read 4 bytes (716 pending)
. 2016-01-07 14:46:49.890 Read 716 bytes (0 pending)

问候

【问题讨论】：

  • 向我们展示一个来自 WinSCP 和 FileZilla 的会话日志文件（一个真正的日志文件，而不是来自 GUI 的消息日志）。
  • 我添加了两个日志文件。希望这是你想看到的？
  • 对不起，我没有意识到它是 SFTP，所以在普通日志中不会看到列表。您可以从 WinSCP 添加“调试 2”级别的日志吗？同时向我们展示您的文件系统代码。
  • 我为 FileSystemFactory 添加了我的实现。 WinSCP日志的“Debug 2”级别真的有必要加吗？ WinSCP 正在按预期工作。
  • 从 Debug 2 日志中，我们可以看到您的服务器正在发送到 WinSCP 的列表。

标签： java sftp filezilla apache-mina sshd


【解决方案1】：

问题在 Apache Mina SSHD 1.1.0 中得到解决，参见

保留早期版本的解决方案：

问题部分出在双方，Mina SSHD 服务器和 FileZilla 客户端。

在 SFTP 版本 3（FileZilla 使用）中，每个文件的条目都包含结构化元数据和仅显示字符串（又名 longname 字段），其格式与 *nix ls -l 命令中的格式相似.不应解析该仅显示字符串。

但 FileZilla 会解析它，而不是使用结构化元数据（文件时间戳除外）。 FileZilla 用于实现 SFTP 协议的内部 psftp 进程仅将此信息提供给父 FileZilla 进程（sftp_cmd_ls 函数）：

if (ournames[i]->attrs.flags & SSH_FILEXFER_ATTR_ACMODTIME) {
    mtime = ournames[i]->attrs.mtime;
}
fzprintf(sftpListentry, "%lu %s", mtime, ournames[i]->longname);

Mina SSHD/SFTP（SftpSubsystem 类）在列出 . 和 .. 元目录时，错误地在仅显示字符串中使用了当前文件夹名称和父文件夹名称，而不是. 和 ..。它在结构化数据（shortname 字段）中正确使用了. 和..。

FileZilla 从列表中读取错误的名称并感到困惑，将条目视为实际的子目录条目，而不是元目录。

在根目录中，. 和.. 可能都列为/。 FileZilla 会修剪所有内容，直到最后一个 /，导致出现空条目（并且两个同名的 [empty-named] 条目可能合并为一个）。

所以不是

.
..
upload
download

FileZilla 看到

/ [treated as an empty string]
/ [treated as an empty string and ignored as duplicate]
upload
download

在upload 目录中，. 列为upload，.. 列为/（导致空条目）。

所以不是

.
..

FileZilla 看到

upload
/ [treated as an empty string]

相反，WinSCP 从不使用仅显示字符串来解析文件/目录名称。并且主要（如果服务器支持，Mina SSHD 所做的）使用 SFTP 版本 4，它甚至不包括仅显示字符串。

要解决此问题，您需要将SftpSubsystem.writeDirEntry 方法的shortName 参数传递给被调用的.getLongName 方法。并修改.getLongName 以在它返回的字符串中使用shortName 而不是getShortName(f)。

请参见下面的修改后的代码SftpSubsystem，其中 cmets 描述了这些更改。代码来自 Mina SSHD 1.0 版

protected void writeDirEntry(int id, DirectoryHandle dir, Buffer buffer, int index, Path f, String shortName, LinkOption... options) throws IOException {
   ...
    if (version == SFTP_V3) {
        // added shortName argument
        String longName = getLongName(f, options, shortName);
    } else {
    ...
}

// added shortName parameter
protected String getLongName(Path f, LinkOption... options, String shortName) throws IOException {
    // added shortName argument
    return getLongName(f, true, options, shortName);
}

// added shortName parameter
private String getLongName(Path f, boolean sendAttrs, LinkOption... options, String shortName) throws IOException {
    ...
    // added shortName argument
    return getLongName(f, attributes, shortName);
}

// added shortName parameter
private String getLongName(Path f, Map<String, ?> attributes, String shortName) throws IOException {
    ...
    return (SftpHelper.getBool(isDirectory) ? "d" : (SftpHelper.getBool(isLink) ? "l" : "-"))
            + PosixFilePermissions.toString(perms) + "  "
            + (attributes.containsKey("nlink") ? attributes.get("nlink") : "1")
            + " " + username + " " + group + " " + lengthString + " "
            + UnixDateFormat.getUnixDate((FileTime) attributes.get("lastModifiedTime"))
            // using shortName instead of getShortName(f) 
            + " " + shortName;
}

// + you need to modify sendPath to pass getShortName(f) 
//   to its call to getLongName

我不会 Java，所以请原谅任何损坏的代码。

考虑将错误报告给 Mina SSHD 项目。如果您这样做，请在此处链接问题。

【讨论】：

  • 感谢您的宝贵时间。这似乎行得通。 :) 我也向 Apache Mina SSHD 项目报告了这一点。 issues.apache.org/jira/browse/SSHD-622
  • 嗨@nlsn，我正在尝试实现相同类型的虚拟目录结构，但一直在创建根目录。如果您有工作代码库，是否可以共享它以便我参考。下面是我到目前为止制定的代码。 stackoverflow.com/questions/59822992/…
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