Re: FTP objects

[David Bateman]

Judd Storrs wrote:
> > > | Anothe
> I setup a local ftp server for testing (i.e. it will only work for me,
> the firewalls won't let outsiders in).
>
> hostname: cuneus.msbb.uc.edu
> username: ftpuser
> password: 12345
>
> If I start matlab and run
>
> fp = ftp('cuneus.msbb.uc.edu','ftpuser','12345') ;
> save ftp.mat fp
> dir(fp)
>
> I get the expected file listing. If I then quit matlab and restart
>
> load ftp.mat
> dir(fp)
>
> works and gives the same file listing.
>   
Ok that is pretty conclusive.

>   
> > I don't know if matlab provides the get accessor function for FTP
> > objects and so this might just fail. The only other way to see if matlab
> > stores the username/password is to read the ftp.m constructor and maybe
> > modify the display method.
> >     
>
> Tab completion in the Matlab command window indicates that fp.password exists.
>
>   
I didn't think you should be allowed to access the fields of the object 
as a structure in this manner

> > > struct(fp)
> > >       
>
> ans =
>
>       jobject: [1x1 org.apache.commons.net.ftp.FTPClient]
>          host: 'cuneus.msbb.uc.edu'
>          port: 21
>      username: 'ftpuser'
>      password: '12345'
>     remotePwd: [1x1 java.lang.StringBuffer]
>          type: [1x1 java.lang.StringBuffer]
>   
I'm currently storing "host", "username", "password" and a key into an 
array of CURL handles in the object itself. This curl handle is probably 
equivalent to the jobject in matlab. The remote path I'm adding into the 
object to store in the saveobj method and at the same time removing the 
curl handle. I'm not storing the port of the type.

> So it looks like the password is saved in plaintext. 
Yes it does so I'll leave it at that.

> I'm attaching
> ftp.mat. It wouldn't load in octave because I didn't have a matching
> constructor. I can't remember how to get around that but I think there
> is a way.
>   
Could I have a v6 version of this file.. The compression of a v7 format 
makes the file difficult to read manually..  As for loading it into 
Octave, I believe the only way to do it is to modify ls-mat5.cc so that 
classes without constructors are treated as structures, or just disable 
classes temporarily by setting "isclass=false" at the "case 
MAT_FILE_STRUCT_CLASS" statement in the load function.

D.

> --judd
>   


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