Hi,
+-From: "Oberhuber, Martin" <[EMAIL PROTECTED]> --
|_Date: Wed, 19 Sep 2007 11:47:37 +0200 _______________________
|
|I'm wondering if anybody thought about the case yet where
|I'd like to transfer files via Sftp, where the file names
|Use non-ASCII foreign language characters, and the character
|Encoding on the local system is different than the remote.
|
|Say, I want to transfer from a Windows box to a Linux box.
|On Windows, my encoding is Cp1252
|On remote Linux, my encoding is UTF-8
|I want to transfer file "m,Mv(Bchte"
|
|Currently, channel always seems to encode Java Unicode Strings
|With Platform default encoding (Cp1252 in my case). On the
|Remote, file names will not appear as expected.
Yes, it is a bug/incompleteness of jsch.
As far as I have understood, we have to send filenames in UTF-8 over
sftp protocol. For example, its IETF draft[1] has said as follows,
8.1.1. Opening a File
Files are opened and created using the SSH_FXP_OPEN message.
byte SSH_FXP_OPEN
uint32 request-id
string filename [UTF-8]
uint32 desired-access
uint32 flags
ATTRS attrs
On the other hand, in the current jsch implementation,
filenames have been sent in the local default encoding.
I'll fix it in the next version, but it will cause the troubles for others.
It seems to me that OpenSSH(for example, openssh-4.7p1)'s sftp-server has
not implemented such encoding conversion. So, as for the avobe case,
if the remote host does not use UTF-8, users will get unexpected results.
This is the reason I had not implemented it.
|To fix this, I think there should be
| Channel.setControlEncoding(String encoding)
|So I can specify the encoding to use forr file and
|Path names on the remote. At the time the Java unicode
|String for arguments is converted to byte arrray, it
|Should do so with the default encoding specified by me.
Unfortunately, the client does not have the initiative to choose the
encoding and filenames must be sent in UTF-8 according to the RFC.
[1] http://tools.ietf.org/html/draft-ietf-secsh-filexfer-13
Sincerely,
--
Atsuhiko Yamanaka
JCraft,Inc.
1-14-20 HONCHO AOBA-KU,
SENDAI, MIYAGI 980-0014 Japan.
Tel +81-22-723-2150
+1-415-578-3454
Fax +81-22-224-8773
Skype callto://jcraft/
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