RE: Using Apache VFS to FTP to the AS/400 IFS -- JAVA400-L

Sara:

Sorry I missed your earlier post. Thanks for the feedback.

We had a similar problem with DataExpress. The powers-that-be declared
we had to use DataExpress instead of letting customers connect to our
FTP server (an AS400). DataExpress would then connect to our FTP server
and deliver the file.

The similar problem was that DataExpress couldn't be configured to send
NAMEFMT=1.

We solved that by targeting DataExpress to a Windows server and deliver
to a drive which was mapped to a folder in the IFS.

I think fixing Apache Commons VFS should not be too big a problem. The
reason I think this is that it supports PASV (from what I read). That
means it has support for negotiation of commands between Apache Commons
VFS and the FTP server.

The trick will be finding where the PASV stuff is handled, subclass
those to add support for NAMEFMT then subclass the FTP configuration
class to use the NAMEFMT class added.

Good luck!
Bill Blalock

-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx
[mailto:java400-l-bounces@xxxxxxxxxxxx] On Behalf Of Sarah Poger
Gladstone
Sent: Monday, October 20, 2008 7:22 AM
To: Java Programming on and around the iSeries / AS400
Subject: Re: Using Apache VFS to FTP to the AS/400 IFS

I was able to get Apache Commons VFS working by changing the CHGFTPA
so that the default naming is IFS style. But, this solution was
unacceptable to the sys admins, as it affects everyone on the box.
But I was unable to get VFS to work any other way. So I opened a issue
in the Apache VFS bug tracking system. The url to the issue is
https://issues.apache.org/jira/browse/VFS-224

I have a lower-level Java API for FTP that I usually use, but I was
hoping to use VFS instead because it also supports SFTP , HTTP, HTTPS,
WebDAV, telnet, SSH,local File systems, and in memory files. Ideally I
would like to use one API to cover all these protocols, or at least
both FTP and SFTP.

-Sarah

On Wed, Oct 15, 2008 at 10:18 AM, Sarah Poger Gladstone
<sarah@xxxxxxxxxxxxxx> wrote:

Bill - I tried my code with setUserDirIsRoot set to true, and also
tried false. Neither worked. I looked into subclassing
FtpFileSystemConfigBuilder, but it is only a transfer object used to
store config settings. It does not connect to the FTP server or do any
communication. Any other suggestions?

Thanks,
Sarah

On Tue, Oct 14, 2008 at 4:18 PM, Blalock, Bill <Bill.Blalock@xxxxxxxx>

wrote:

Hey Sarah:

I got curious and checked out the Apache VFS site.

You might try changing

FtpFileSystemConfigBuilder.getInstance().
setUserDirIsRoot(fileSystemOptions, true);

To "false".

According to the javadocs this method
> use user directory as root (do not change to fs root)

I think "true" is telling the FTP server to put the file in the

CURLIB.

"false" might tell the FTP server to put the file relative to the

root.

That might cause a CD and force NAMEFMT to change (as Tamas

suggests).

The real solution would be to subclass FtpFileSystemConfigBuilder for
the i5 FTP server ;)

Let us know if that works please.

Bill Blalock

-----Original Message-----
From: java400-l-bounces@xxxxxxxxxxxx
[mailto:java400-l-bounces@xxxxxxxxxxxx] On Behalf Of Tamas Perlaky
Sent: Tuesday, October 14, 2008 3:23 PM
To: Java Programming on and around the iSeries / AS400
Subject: Re: Using Apache VFS to FTP to the AS/400 IFS

Hi Sarah,

Since you're not using FTP directly (i.e. with VFS as an intermediate
layer) your only option may be to change the system default to *PATH
naming (NAMEFMT 1) via the CHGFTPA command. Of course this may break
other things which expect *SYS naming (NAMEFMT 0) so be sure to check
with any appropriate parties first.

If you were using a different FTP client you might be able to use an
FTP site command to issue a literal SITE NAMEFMT 1 to the FTP server
to effect this switch. This may somehow be possible with VFS but I'm
not familiar with it at all so I can't make a recommendation there.
Another trick would be to force the first command of your FTP session
to be a CD such that the directory specified starts with a slash

(e.g.

"CD /home/aplsup"), in which case the leading slash would trigger an
implicit switch to *PATH naming for that session...

If you're looking for an FTP client library I can recommend jScape's
(commercial license) which I quite like. I've also used /n

software's

(also commercial), which I quite dislike.

t.

On 14-Oct-08, at 1:36 PM, Sarah Poger Gladstone wrote:

I have been using the Apache VFS API's to upload to Unix FTP servers
successfully. But I am unable to upload to the IFS on my AS/400. I
can upload to QGPL, but not the IFS.

Below is an excerpt from my Java code:

FileSystemManager mgr;
try {
mgr = VFS.getManager();

FileSystemOptions fileSystemOptions;
FileSystemOptions opts = new

FileSystemOptions();

fileSystemOptions = opts;
FtpFileSystemConfigBuilder
.getInstance().setUserDirIsRoot(fileSystemOptions,
true);

String strLocalFile =

"C:\\sgladstone\\edfiles\\mydata.txt";

FileObject foLocalFile =

mgr.resolveFile(strLocalFile);

String rUrlStr =
"ftp://myusername:mypassword@myas400/home/aplsup/sarahtest.txt"; ;
FileObject foRemoteFile = mgr.resolveFile(

rUrlStr, opts);

FileSelector fS = Selectors.SELECT_SELF ;
foRemoteFile.copyFrom(foLocalFile, fS);

When I run this code, it throws the exception:

Caused by: org.apache.commons.vfs.FileSystemException: Could not
create FTP directory "ftp://myusername:mypassword@myas400/home";

I think this issue is caused by the AS/400 trying to use System
naming, instead of using NAMEFMT=1.

Any ideas of how to get the VFS APIs to get the AS/400 to switch to
NAMEFMT =1 ?

Thanks,
Sarah
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