From: Knute Johnson <nospam@...>
Date: 2008-02-20T04:19:59+09:00
Subject: FTP problem under Linux?

The code below, as ugly as it is, runs perfectly on Windows but hangs at
the gettextfile under Linux.  I'm using ruby-1.8.6.111-1.fc8 on Fedora 8 
and ruby 1.8.6 (2007-09-24 patchlevel 111) [i386-mswin32] under Windows 
XP.  I am able to use the command line ftp client to log into the site 
and retrieve the file with no problems.  Any ideas?

Thanks,

#!/usr/bin/ruby

require 'net/ftp'

def getMetar(id)
     metar = Array.new
     i = 0
     ftp = Net::FTP.new('tgftp.nws.noaa.gov')
     puts ftp.login
     puts ftp.sendcmd('PASV')
     ftp.chdir('/data/observations/metar/stations')
     ftp.gettextfile("#{id.upcase}.TXT") do |line|
         metar[i] = line
         i = i + 1
     end
     ftp.close
     return metar
end

puts getMetar("KBFL")

[knute@www ~]$ ruby metar.rb
230 Login successful.
227 Entering Passive Mode (140,90,128,71,154,251)
/usr/lib/ruby/1.8/net/ftp.rb:340:in `accept': Interrupt
         from /usr/lib/ruby/1.8/net/ftp.rb:340:in `transfercmd'
         from /usr/lib/ruby/1.8/net/ftp.rb:421:in `retrlines'
         from /usr/lib/ruby/1.8/monitor.rb:242:in `synchronize'
         from /usr/lib/ruby/1.8/net/ftp.rb:419:in `retrlines'
         from /usr/lib/ruby/1.8/net/ftp.rb:518:in `gettextfile'
         from metar.rb:13:in `getMetar'
         from metar.rb:37

The error trace is generated when I press control-C after the hang.

-- 

Knute Johnson
email s/nospam/knute/


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