http://qs1969.pair.com?node_id=181479


in reply to Re: Net::FTP via CGI mystery
in thread Net::FTP via CGI mystery

I tried increasing the debug level as you suggest, and it leaves me more baffled, but in a more specific way. First, I boiled down the script to the absolute minimum necessary to recreate the problem. It's now:
#!/usr/bin/perl -w use strict; use Net::FTP; #use CGI::Carp qw(fatalsToBrowser warningsToBrowser); my $ftp = Net::FTP->new("ftp.xxxxx.xxx"); $ftp->pasv; $ftp->login('xxx','xxx'); my @files = $ftp->ls('/tst') or die "could not do ls"; print "Content-Type: text/html\n\n"; print "$_\n" for @files; print "done\n";
Now, it still works fine when run from the command line, and fails when run from the browser. When it fails in the browser I just get an internal server error, because I deleted CGI::Carp, but reviewing the error logs shows the following (n.b. I tried this with a different ftp server too, so I really think that the problem is here):

Output from the script when run from the COMMAND LINE

Net::FTP: Net::FTP(2.61) Net::FTP: Exporter(5.562) Net::FTP: Net::Cmd(2.20) Net::FTP: IO::Socket::INET(1.25) Net::FTP: IO::Socket(1.26) Net::FTP: IO::Handle(1.21) Net::FTP=GLOB(0x81177a8)<<< 220 xxxxxxxx.xxx ULTRA FTP SERVER Net::FTP=GLOB(0x81177a8)>>> PASV Net::FTP=GLOB(0x81177a8)<<< 530 Please login with USER and PASS. Net::FTP=GLOB(0x81177a8)>>> user xxx Net::FTP=GLOB(0x81177a8)<<< 331 Password required for xxx. Net::FTP=GLOB(0x81177a8)>>> PASS .... Net::FTP=GLOB(0x81177a8)<<< 230 CyBo welcomes replicant xxx. Net::FTP=GLOB(0x81177a8)>>> PASV Net::FTP=GLOB(0x81177a8)<<< 227 Entering Passive Mode (XXX,XX,XXX,XXX, +XXX,XXX). Net::FTP=GLOB(0x81177a8)>>> NLST /tst Net::FTP=GLOB(0x81177a8)<<< 150 Opening ASCII mode data connection for + file list Net::FTP=GLOB(0x81177a8)<<< 226 Transfer complete. Content-Type: text/html /tst/graphics /tst/style /tst/images done Net::FTP=GLOB(0x81177a8)>>> QUIT Net::FTP=GLOB(0x81177a8)<<< 221 Goodbye.

Error Log report when run from the WEB BROWSER

Net::FTP: Net::FTP(2.61) Net::FTP: Exporter(5.562) Net::FTP: Net::Cmd(2.20) Net::FTP: IO::Socket::INET(1.25) Net::FTP: IO::Socket(1.26) Net::FTP: IO::Handle(1.21) Net::FTP=GLOB(0x8286474)<<< 220 xxxxx.xxx ULTRA FTP SERVER Net::FTP=GLOB(0x8286474)>>> PASV Net::FTP=GLOB(0x8286474)<<< 530 Please login with USER and PASS. Net::FTP=GLOB(0x8286474)>>> user xxx Net::FTP=GLOB(0x8286474)<<< 331 Password required for xxx. Net::FTP=GLOB(0x8286474)>>> PASS .... Net::FTP=GLOB(0x8286474)<<< 230 CyBo welcomes replicant xxx. Net::FTP=GLOB(0x8286474)>>> PORT XXX,XX,XXX,XXX,XXX,XXX Net::FTP=GLOB(0x8286474)<<< 200 PORT command successful. Net::FTP=GLOB(0x8286474)>>> NLST /tst Net::FTP=GLOB(0x8286474)<<< 425 Can't build data connection: Connectio +n refused could not do ls at ftp.pl line 9. Net::FTP=GLOB(0x8286474)>>> QUIT Net::FTP=GLOB(0x8286474)<<< 221 Goodbye.
So... it seems that what's happening is that when run from the browser the script doesn't go into passive mode (whatever that means)... but I thought it already was in passive mode. I'm completely out of my depth here, and I would be most grateful for a steer on how to get this to work.

George Sherston