From: Timothy Hunter <TimHunter@...>
Date: 2007-02-27T09:20:05+09:00
Subject: Net::FTP hangs


Running ruby 1.8.5 (2006-08-25) on Mac OS X 10.4.8.

I'm trying to get this example from the _Ruby_Cookbook_ to work, but it 
hangs in the ftp.list method. What am I doing wrong?

#!/usr/bin/env ruby

require 'net/ftp'

ftp = Net::FTP.open("ftp.ibiblio.org") do |ftp|
    ftp.login
    ftp.chdir("pub/linux/")
    ftp.list('*Linux*') {|file| puts file}
end

Eventually this will fail with these messages:

/opt/local/lib/ruby/1.8/net/ftp.rb:241:in `getresp': 425 Unable to build 
data connection: Connection timed out (Net::FTPTempError)
        from /opt/local/lib/ruby/1.8/net/ftp.rb:264:in `sendcmd'
        from /opt/local/lib/ruby/1.8/monitor.rb:238:in `synchronize'
        from /opt/local/lib/ruby/1.8/net/ftp.rb:262:in `sendcmd'
        from /opt/local/lib/ruby/1.8/net/ftp.rb:336:in `transfercmd'
        from /opt/local/lib/ruby/1.8/net/ftp.rb:421:in `retrlines'
        from /opt/local/lib/ruby/1.8/monitor.rb:238:in `synchronize'
        from /opt/local/lib/ruby/1.8/net/ftp.rb:419:in `retrlines'
        from /opt/local/lib/ruby/1.8/net/ftp.rb:625:in `list'
        from ftptest.rb:8
        from /opt/local/lib/ruby/1.8/net/ftp.rb:115:in `open'
        from ftptest.rb:5

I can connect to this server and issue similar commands using the 
command line ftp client:

ruby$ ftp
ftp> open ftp.ibiblio.org
Connected to ibiblio.org.
220 ProFTPD Server (Bring it on...)
Name (ftp.ibiblio.org:tim): anonymous
331 Anonymous login ok, send your complete email address as your password.
Password:
230-
   Welcome to ftp.ibiblio.org, the public ftp server of ibiblio.org.  We
   hope you find what you're looking for.
 
   If you have any problems or questions, please send email to
 
   ftpkeeper@ibiblio.org
 
   Thanks!
 
230 Anonymous access granted, restrictions apply.
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> cd pub/linux
250 CWD command successful
ftp> ls *Linux*
229 Entering Extended Passive Mode (|||60724|)
150 Opening ASCII mode data connection for file list
-rw-r--r--   1 (?)      users      531113 Feb 26 11:06 00-find.Linux.gz
-rw-rw-r--   1 (?)      admin          73 Mar  9  2001 How-do-I-get-Linux
226 Transfer complete.
ftp>