Re: SFTP Doubts

On Tue, May 27, 2008 at 8:26 AM, Rajnikant
<[email protected]> wrote:
> Hello everyone,
>
> I'm trying to replace FTP module by SFTP. I'm facing some issues in doing
> same.
> Following is the list of my doubts :(.
snip

These are questions, not doubts.  See
http://www.perlmonks.org/?node_id=444996 for more information about
the difference.

snip
> 1. why are there no ascii and binary methods associated with SFTP?
snip

Because the spec doesn't call for them.  There are innumerable
different ways of encoding text and more are being invented everyday.
When FTP was invented there were basically three: ASCII, EBCIDIC, and
binary.  Should SFTP support UTF-8?  What about UTF-16?  Should it do
automatic conversions?  No, it should transfer files and leave the
conversion decisions to other programs like iconv.  The less code in
SFTP the less chance of a bug that could compromise security.

snip
> 2. Are there any methods exists in SFTP similar to that of
> login,ascii,binary as that in FTP module?
snip

Well, IBM added an EBCIDIC->ASCII and vice versa option to their
mainframe version, but to my knowledge that is it.

snip
> 3. How to check SFTP method failure in Perl?
snip

Depends on what module you are using.

snip
> 4. how to delete the SFTP object created by New method?
snip

The same way all Perl objects are garbage collected, when it goes out of scope.

-- 
Chas. Owens
wonkden.net
The most important skill a programmer can have is the ability to read.