Re: Anybody knows good ftp-programm

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#106

From: Jarle Aase
Date: Thu, 02 Jan 1997 00:00

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"Petra Lehmann" <lehmann@hypernet.de> wrote:

>Does anybody knows a ftp-programm, which continous a download which stopped
>at the middle of the download?

>For example: file is 11 MB - the provider cuts the connection after every 3
>MB?

The REST command is part of the FTP specs. However - according to the
RFC it require use of BLOCK or COMPRESS mode to work. Neither UNIX
ftpd, wu-ftpd, War-FTPd or any other FTP server that I know of support
these modes, and I have never seen a FTP client that asks the server
to use them.

  RFC 959 sect. 3.5.  ERROR RECOVERY AND RESTART

  The restart procedure is defined only for the block and compressed
  modes of data transfer.  It requires the sender of data to insert
  a special marker code in the data stream with some marker
  information.  The marker information has meaning only to the
  sender, but must consist of printable characters in the default or
  negotiated language of the control connection (ASCII or EBCDIC).

That was the bad news :-)

Most (all?) modern FTP servers support the REST command by simply
using a byte offset in stead of the "marker" the RFC describes. This
"feature" require about 10 - 50 lines of c code in a FTP program. In
other words - if you use a FTP client that _dont_ support this -
you're using the wrong FTP client!

The _best_ ftp client I've used on Windows95/NT is ncftp.exe This is a
32 bit command line program (looks very primitive at first sight), but
it is packed with useful features, including resume.

Jarle

-- 
Jarle Aase                      email: jgaa@online.no
Author of freeware.             http://www.jgaa.com
(War FTP Daemon)                news:alt.comp.jgaa

<<< no need to argue - just kill'em all! >>>

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From: jgaa@online.no (Jarle Aase)
Subject: Re: Anybody knows good ftp-programm
Date: 1997/01/02
Message-ID: <5agct2$g83@elle.eunet.no>
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organization: Jgaa's Internet (www.jgaa.com)
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