Current File : //data/old/usr/share/perl5/vendor_perl/Net/FTPServer/DBeg1/Server.pm
# -*- perl -*-
# Net::FTPServer A Perl FTP Server
# Copyright (C) 2000 Bibliotech Ltd., Unit 2-3, 50 Carnwath Road,
# London, SW6 3EG, United Kingdom.
#
# 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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
=pod
=head1 NAME
Net::FTPServer::DBeg1::Server - The DB example FTP server personality
=head1 SYNOPSIS
dbeg1-ftpd.pl [-d] [-v] [-p port] [-s] [-S] [-V] [-C conf_file]
=head1 DESCRIPTION
C<Net::FTPServer::DBeg1::Server> is the example DB-based FTP server
personality. This personality implements a simple
FTP server with a PostgreSQL database back-end.
=head1 METHODS
=cut
package Net::FTPServer::DBeg1::Server;
use strict;
use vars qw($VERSION);
( $VERSION ) = '$Revision: 1.1 $ ' =~ /\$Revision:\s+([^\s]+)/;
use DBI;
use Net::FTPServer;
use Net::FTPServer::DBeg1::FileHandle;
use Net::FTPServer::DBeg1::DirHandle;
use vars qw(@ISA);
@ISA = qw(Net::FTPServer);
# Cached statement handles.
use vars qw($sth1 $sth2 $sth3);
# This is called before configuration.
sub pre_configuration_hook
{
my $self = shift;
$self->{version_string} .= " Net::FTPServer::DBeg1/$VERSION";
# Custom SITE commands.
$self->{site_command_table}{USAGE} = \&_SITE_USAGE_command;
}
# This is called just after accepting a new connection. We connect
# to the database here.
sub post_accept_hook
{
my $self = shift;
# Connect to the database.
my $dbh = DBI->connect ("dbi:Pg(RaiseError=>1,AutoCommit=>0):dbname=ftp",
"", "")
or die "cannot connect to database: ftp: $!";
# Store the database handle.
$self->{fs_dbh} = $dbh;
}
# This is called after executing every command. It commits the transaction
# into the database.
sub post_command_hook
{
my $self = shift;
$self->{fs_dbh}->commit;
}
# Perform login against the database.
sub authentication_hook
{
my $self = shift;
my $user = shift;
my $pass = shift;
my $user_is_anon = shift;
# Disallow anonymous access.
return -1 if $user_is_anon;
# Verify access against the database.
my $sql = "select password from users where username = ?";
$sth1 ||= $self->{fs_dbh}->prepare ($sql);
$sth1->execute ($user);
my $row = $sth1->fetch or return -1; # No such user.
# Check password.
my $hashed_pass = $row->[0];
return -1 unless crypt ($pass, $hashed_pass) eq $hashed_pass;
# Successful login.
return 0;
}
# Called just after user C<$user> has successfully logged in.
sub user_login_hook
{
# Do nothing for now, but in future it would be a good
# idea to change uid or chroot to a safe place.
}
# Return an instance of Net::FTPServer::DBeg1::DirHandle
# corresponding to the root directory.
sub root_directory_hook
{
my $self = shift;
return new Net::FTPServer::DBeg1::DirHandle ($self);
}
# The SITE USAGE command.
sub _SITE_USAGE_command
{
my $self = shift;
my $cmd = shift;
my $rest = shift;
# Count the number of files and directories used.
my $sql = "select count(id) from files";
$sth2 ||= $self->{fs_dbh}->prepare ($sql);
$sth2->execute;
my $row = $sth2->fetch or die "no rows returned from count";
my $nr_files = $row->[0];
$sql = "select count(id) from directories";
$sth3 ||= $self->{fs_dbh}->prepare ($sql);
$sth3->execute;
$row = $sth3->fetch or die "no rows returned from count";
my $nr_dirs = $row->[0];
$self->reply (200,
"There are $nr_files files and $nr_dirs directories.");
}
1 # So that the require or use succeeds.
__END__
=head1 AUTHORS
Richard Jones (rich@annexia.org).
=head1 COPYRIGHT
Copyright (C) 2000 Biblio@Tech Ltd., Unit 2-3, 50 Carnwath Road,
London, SW6 3EG, UK
=head1 SEE ALSO
C<Net::FTPServer(3)>,
C<Net::FTP(3)>,
C<perl(1)>,
RFC 765,
RFC 959,
RFC 1579,
RFC 2389,
RFC 2428,
RFC 2577,
RFC 2640,
Extensions to FTP Internet Draft draft-ietf-ftpext-mlst-NN.txt.
=cut
Mini Shell