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# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
=encoding utf8
=head1 NAME
Dselect::Method::Ftp - dselect FTP method support
=head1 DESCRIPTION
This module provides support functions for the FTP method.
B<Note>: This is a private module, its API can change at any time.
=cut
package Dselect::Method::Ftp 0.01;
use strict;
use warnings;
our @EXPORT = qw(
do_connect
do_mdtm
);
use Exporter qw(import);
use Carp;
eval q{
use Net::FTP;
use Data::Dumper;
};
if ($@) {
warn "Missing Net::FTP modules required by the FTP access method.\n\n";
exit 1;
}
sub do_connect {
my (%opts) = @_;
my($rpass,$remotehost,$remoteuser,$ftp);
TRY_CONNECT:
while(1) {
my $exit = 0;
if ($opts{useproxy}) {
$remotehost = $opts{proxyhost};
$remoteuser = $opts{username} . '@' . $opts{ftpsite};
} else {
$remotehost = $opts{ftpsite};
$remoteuser = $opts{username};
}
print "Connecting to $opts{ftpsite}...\n";
$ftp = Net::FTP->new($remotehost, Passive => $opts{passive});
if(!$ftp || !$ftp->ok) {
print "Failed to connect\n";
$exit = 1;
}
if (!$exit) {
# $ftp->debug(1);
if ($opts{useproxy}) {
print "Login on $opts{proxyhost}...\n";
$ftp->_USER($opts{proxylogname});
$ftp->_PASS($opts{proxypassword});
}
print "Login as $opts{username}...\n";
if ($opts{password} eq '?') {
print 'Enter password for ftp: ';
system('stty', '-echo');
$rpass = <STDIN>;
chomp $rpass;
print "\n";
system('stty', 'echo');
} else {
$rpass = $opts{password};
}
if(!$ftp->login($remoteuser, $rpass))
{ print $ftp->message() . "\n"; $exit = 1; }
}
if (!$exit) {
print "Setting transfer mode to binary...\n";
if(!$ftp->binary()) { print $ftp->message . "\n"; $exit = 1; }
}
if (!$exit) {
print "Cd to '$opts{ftpdir}'...\n";
if (!$ftp->cwd($opts{ftpdir})) {
print $ftp->message . "\n";
$exit = 1;
}
}
if ($exit) {
if (yesno ('y', 'Retry connection at once')) {
next TRY_CONNECT;
} else {
die 'error';
}
}
last TRY_CONNECT;
}
# if(!$ftp->pasv()) { print $ftp->message . "\n"; die 'error'; }
return $ftp;
}
##############################
# assume server supports MDTM - will be adjusted if needed
my $has_mdtm = 1;
my %months = (
Jan => 0,
Feb => 1,
Mar => 2,
Apr => 3,
May => 4,
Jun => 5,
Jul => 6,
Aug => 7,
Sep => 8,
Oct => 9,
Nov => 10,
Dec => 11,
);
my $ls_l_re = qr<
([^ ]+\ *){5} # Perms, Links, User, Group, Size
[^ ]+ # Blanks
\ ([A-Z][a-z]{2}) # Month name (abbreviated)
\ ([0-9 ][0-9]) # Day of month
\ ([0-9 ][0-9][:0-9][0-9]{2}) # Filename
>x;
sub do_mdtm {
my ($ftp, $file) = @_;
my ($time);
#if ($has_mdtm) {
$time = $ftp->mdtm($file);
# my $code = $ftp->code();
# my $message = $ftp->message();
# print " [ $code: $message ] ";
if ($ftp->code() == 502 || # MDTM not implemented
$ftp->code() == 500) { # command not understood (SUN firewall)
$has_mdtm = 0;
} elsif (!$ftp->ok()) {
return;
}
#}
if (! $has_mdtm) {
require Time::Local;
my @files = $ftp->dir($file);
if (($#files == -1) ||
($ftp->code == 550)) { # No such file or directory
return;
}
# my $code = $ftp->code();
# my $message = $ftp->message();
# print " [ $code: $message ] ";
# print "[$#files]";
# get the date components from the output of 'ls -l'
if ($files[0] =~ $ls_l_re) {
my($month_name, $day, $year_or_time, $month, $hours, $minutes,
$year);
# what we can read
$month_name = $2;
$day = 0 + $3;
$year_or_time = $4;
# translate the month name into number
$month = $months{$month_name};
# recognize time or year, and compute missing one
if ($year_or_time =~ /([0-9]{2}):([0-9]{2})/) {
$hours = 0 + $1; $minutes = 0 + $2;
my @this_date = gmtime(time());
my $this_month = $this_date[4];
my $this_year = $this_date[5];
if ($month > $this_month) {
$year = $this_year - 1;
} else {
$year = $this_year;
}
} elsif ($year_or_time =~ / [0-9]{4}/) {
$hours = 0; $minutes = 0;
$year = $year_or_time - 1900;
} else {
die 'cannot parse year-or-time';
}
# build a system time
$time = Time::Local::timegm(0, $minutes, $hours, $day, $month, $year);
} else {
die 'regex match failed on LIST output';
}
}
return $time;
}
=head1 CHANGES
=head2 Version 0.xx
This is a private module.
=cut
1;
__END__
|
