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
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.
cd pub/linux
250 CWD command successful
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.
···
Works for me from script or in irb. I'd be suspicious about your name resolution
I'd suggest breaking this down - do any of the net examples work?
Try an http example
Try writing a dns client
Good luck
pboothOSXhome:~ pbooth$ uname -a
Darwin pboothOSXhome.local 8.8.2 Darwin Kernel Version 8.8.2: Thu Sep 28 20:43:26 PDT 2006; root:xnu-792.14.14.obj~1/RELEASE_I386 i386 i386
pboothOSXhome:~ pbooth$
pboothOSXhome:~ pbooth$ ruby ftpscript.rb
-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
pboothOSXhome:~ pbooth
Last login: Mon Feb 26 21:18:06 on console
Welcome to Darwin!
pboothOSXhome:~ pbooth$ irb
irb(main):001:0> require 'net/ftp'
=> true
irb(main):002:0> ftp = Net::FTP.open("ftp.ibiblio.org") do |ftp|
irb(main):003:1* ftp.login
irb(main):004:1> ftp.chdir("pub/linux")
irb(main):005:1> ftp.list('*Linux*') {|f| puts f}
irb(main):006:1> end
-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
=> nil
irb(main):007:0> quit
pboothOSXhome:~ pbooth$ ruby -v
ruby 1.8.5 (2006-08-25) [powerpc-darwin8.8.0]
pboothOSXhome:~ pbooth$
···
On Feb 26, 2007, at 7:20 PM, Timothy Hunter wrote:
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
> 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.
> cd pub/linux
250 CWD command successful
> 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.
>
Peter Booth wrote:
Works for me from script or in irb. I'd be suspicious about your name resolution
I'd suggest breaking this down - do any of the net examples work?
Try an http example
Try writing a dns client
open-uri works to retrieve a web page via a url. curl works. I installed the most recent version of Ruby but it didn't help.
That did the trick, Ara! Thanks! Now the question is, why?
···
ara.t.howard@noaa.gov wrote:
On Wed, 28 Feb 2007, Timothy Hunter wrote:
Peter Booth wrote:
Works for me from script or in irb. I'd be suspicious about your name resolution
I'd suggest breaking this down - do any of the net examples work?
Try an http example
Try writing a dns client
open-uri works to retrieve a web page via a url. curl works. I installed the most recent version of Ruby but it didn't help.
ftp.passive = true
??
-a
This has to do with the proliferation of FTP servers hidden behind
firewalls over the last few years. There's a fairly detailed
explanation here:
http://slacksite.com/other/ftp.html
If you'd like more information, just google passive FTP.
···
On 2/28/07, Timothy Hunter <TimHunter@nc.rr.com> wrote:
ara.t.howard@noaa.gov wrote:
>
> ftp.passive = true
>
> ??
>
> -a
That did the trick, Ara! Thanks! Now the question is, why?
most client software auto negotiates this these days, like curl, which is very
smart. ruby's ftp lib doesn't. i always forget which is which between
passive and active, but i think people are moving toward passive because it
plays nice with firewalls.
Active FTP vs. Passive FTP, a Definitive Explanation
regards.
-a
···
On Thu, 1 Mar 2007, Timothy Hunter wrote:
ara.t.howard@noaa.gov wrote:
On Wed, 28 Feb 2007, Timothy Hunter wrote:
Peter Booth wrote:
Works for me from script or in irb. I'd be suspicious about your name resolution
I'd suggest breaking this down - do any of the net examples work?
Try an http example
Try writing a dns client
open-uri works to retrieve a web page via a url. curl works. I installed the most recent version of Ruby but it didn't help.
ftp.passive = true
??
-a
That did the trick, Ara! Thanks! Now the question is, why?
--
be kind whenever possible... it is always possible.
- the dalai lama
Thank you for the education, Ara. My ignorance of FTP is a bit less vast than before, thanks to you.
···
ara.t.howard@noaa.gov wrote:
most client software auto negotiates this these days, like curl, which is very
smart. ruby's ftp lib doesn't. i always forget which is which between
passive and active, but i think people are moving toward passive because it
plays nice with firewalls.
Active FTP vs. Passive FTP, a Definitive Explanation
regards.
-a