smitsjelle commented on issue #690:
URL: https://github.com/apache/mina-sshd/issues/690#issuecomment-2717733324
I did a quick test with some OpenSSH SFTP server (from this Docker image)
that reports doReadIdentification `SSH-2.0-OpenSSH_8.4p1 Debian-5+deb11u3`. For
that one it does indeed work fine, which suggests that the issue might indeed
be either server-specific or maybe somewhere in OpenSSH 7.9.
The reason why I'm not sure whether it is a server specific issue yet, is
that this server was handling my append operations just fine when I used an
older Spring Integration version that still used Jsch as SFTP library. Also,
with a small change in the append code I seem to be able to do the append (see
the code snippet below). Do you know if that is because it inherently does a
_write from_ rather than a more dynamic append, or would this still be
considered a 'normal' append?
This snippet does produce working append behavior for this server:
```
SftpClient.CloseableHandle handle = this.sftpClient.open(
destination,
SftpClient.OpenMode.Create,
SftpClient.OpenMode.Write,
SftpClient.OpenMode.Append);
this.sftpClient.write(handle, offset,
inputStream.readAllBytes());
```
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