Current File : //data/old/usr/share/perl5/vendor_perl/Net/FTPServer/DBeg1/FileHandle.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::FileHandle - The full FTP server personality
=head1 SYNOPSIS
use Net::FTPServer::DBeg1::FileHandle;
=head1 METHODS
=cut
package Net::FTPServer::DBeg1::FileHandle;
use strict;
use vars qw($VERSION);
( $VERSION ) = '$Revision: 1.1 $ ' =~ /\$Revision:\s+([^\s]+)/;
use Carp qw(croak confess);
use Net::FTPServer::FileHandle;
use Net::FTPServer::DBeg1::DirHandle;
use Net::FTPServer::DBeg1::IOBlob;
use vars qw(@ISA);
@ISA = qw(Net::FTPServer::FileHandle);
use vars qw($sth1 $sth2 $sth3 $sth4);
# Return a new file handle.
sub new
{
my $class = shift;
my $ftps = shift;
my $pathname = shift;
my $dir_id = shift;
my $file_id = shift;
my $content = shift;
# Create object.
my $self = Net::FTPServer::FileHandle->new ($ftps, $pathname);
$self->{fs_dir_id} = $dir_id;
$self->{fs_file_id} = $file_id;
$self->{fs_content} = $content;
return bless $self, $class;
}
# Return the directory handle for this file.
sub dir
{
my $self = shift;
return Net::FTPServer::DBeg1::DirHandle->new ($self->{ftps},
$self->dirname,
$self->{fs_dir_id});
}
# Open the file handle.
sub open
{
my $self = shift;
my $mode = shift;
if ($mode eq "r") # Open file for reading.
{
return new Net::FTPServer::DBeg1::IOBlob ('r', $self->{ftps}{fs_dbh}, $self->{fs_content});
}
elsif ($mode eq "w") # Create/overwrite the file.
{
# Remove the existing large object and create a new one.
my $dbh = $self->{ftps}{fs_dbh};
my $blob_id = $dbh->func ($dbh->{pg_INV_WRITE}|$dbh->{pg_INV_READ},
'lo_creat');
my $sql = "update files set content = ? where id = ?";
$sth4 ||= $dbh->prepare ($sql);
$sth4->execute ($blob_id, int ($self->{fs_file_id}));
$dbh->func ($self->{fs_content}, 'lo_unlink');
$self->{fs_content} = $blob_id;
return new Net::FTPServer::DBeg1::IOBlob ('w', $self->{ftps}{fs_dbh}, $self->{fs_content});
}
elsif ($mode eq "a") # Append to the file.
{
return new Net::FTPServer::DBeg1::IOBlob ('w', $self->{ftps}{fs_dbh}, $self->{fs_content});
}
else
{
croak "unknown file mode: $mode; use 'r', 'w' or 'a' instead";
}
}
sub status
{
my $self = shift;
my $dbh = $self->{ftps}{fs_dbh};
my $username = substr $self->{ftps}{user}, 0, 8;
# Tricky: pull out the size information for this blob.
# XXX For some reason PostgreSQL (6.4) fails when you call lo_open
# the first time. But if you retry a second time it succeeds. Therefore
# there is this hack. [RWMJ]
my $blob_fd;
for (my $retries = 0; !$blob_fd && $retries < 3; ++$retries)
{
$blob_fd = $dbh->func ($self->{fs_content}, $dbh->{pg_INV_READ},
'lo_open');
}
die "failed to open blob $self->{fs_content}: ", $dbh->errstr
unless $blob_fd;
my $size = $dbh->func ($blob_fd, 0, 2, 'lo_lseek');
$dbh->func ($blob_fd, 'lo_close');
return ( 'f', 0644, 1, $username, "users", $size, 0 );
}
# Move a file to elsewhere.
sub move
{
my $self = shift;
my $dirh = shift;
my $filename = shift;
my $sql = "update files set dir_id = ?, name = ? where id = ?";
$sth2 ||= $self->{ftps}{fs_dbh}->prepare ($sql);
$sth2->execute (int ($dirh->{fs_dir_id}), $filename,
int ($self->{fs_file_id}));
return 0;
}
# Delete a file.
sub delete
{
my $self = shift;
my $sql = "delete from files where id = ?";
$sth1 ||= $self->{ftps}{fs_dbh}->prepare ($sql);
$sth1->execute (int ($self->{fs_file_id}));
# Delete the large object.
$self->{ftps}{fs_dbh}->func ($self->{fs_content}, 'lo_unlink');
return 0;
}
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<perl(1)>
=cut
Mini Shell