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Diffstat (limited to 'dselect/methods/Dselect/Method/Ftp.pm')
| -rw-r--r-- | dselect/methods/Dselect/Method/Ftp.pm | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/dselect/methods/Dselect/Method/Ftp.pm b/dselect/methods/Dselect/Method/Ftp.pm new file mode 100644 index 0000000..c149e0e --- /dev/null +++ b/dselect/methods/Dselect/Method/Ftp.pm @@ -0,0 +1,232 @@ +# 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__ |