Current File : //data/old/usr/share/perl5/vendor_perl/Net/FTPServer/InMem/DirHandle.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::InMem::DirHandle - Store files in local memory
=head1 SYNOPSIS
use Net::FTPServer::InMem::DirHandle;
=head1 METHODS
=cut
package Net::FTPServer::InMem::DirHandle;
use strict;
use vars qw($VERSION);
( $VERSION ) = '$Revision: 1.1 $ ' =~ /\$Revision:\s+([^\s]+)/;
use Carp qw(confess croak);
use IO::Scalar;
use Net::FTPServer::DirHandle;
use vars qw(@ISA);
@ISA = qw(Net::FTPServer::DirHandle);
# Global variables.
use vars qw(%dirs $next_dir_id %files $next_file_id);
# The initial directory structure.
$next_dir_id = 2;
$dirs{1} = { name => "", parent => 0 };
$next_file_id = 1;
# Return a new directory handle.
sub new
{
my $class = shift;
my $ftps = shift; # FTP server object.
my $pathname = shift || "/"; # (only used in internal calls)
my $dir_id = shift; # (only used in internal calls)
# Create object.
my $self = Net::FTPServer::DirHandle->new ($ftps, $pathname);
bless $self, $class;
if ($dir_id)
{
$self->{fs_dir_id} = $dir_id;
}
else
{
$self->{fs_dir_id} = 1;
}
return $self;
}
# Return a subdirectory handle or a file handle within this directory.
sub get
{
my $self = shift;
my $filename = shift;
# None of these cases should ever happen.
confess "no filename" unless defined($filename) && length($filename);
confess "slash filename" if $filename =~ /\//;
confess ".. filename" if $filename eq "..";
confess ". filename" if $filename eq ".";
# Search for the file first, since files are more common than dirs.
foreach (keys %files)
{
if ($files{$_}{dir_id} == $self->{fs_dir_id} &&
$files{$_}{name} eq $filename)
{
# Found a file.
return new Net::FTPServer::InMem::FileHandle ($self->{ftps},
$self->pathname . $filename,
$self->{fs_dir_id},
$_,
$files{$_}{content});
}
}
# Search for a directory.
foreach (keys %dirs)
{
if ($dirs{$_}{parent} == $self->{fs_dir_id} &&
$dirs{$_}{name} eq $filename)
{
# Found a directory.
return new Net::FTPServer::InMem::DirHandle ($self->{ftps},
$self->pathname . $filename . "/",
$_);
}
}
# Not found.
return undef;
}
# Get parent of current directory.
sub parent
{
my $self = shift;
return $self if $self->is_root;
# Get a new directory handle.
my $dirh = $self->SUPER::parent;
# Find directory ID of the parent directory.
$dirh->{fs_dir_id} = $dirs{$self->{fs_dir_id}}{parent};
return bless $dirh, ref $self;
}
sub list
{
my $self = shift;
my $wildcard = shift;
# Convert wildcard to regular expression.
if ($wildcard)
{
if ($wildcard ne "*")
{
$wildcard = $self->{ftps}->wildcard_to_regex ($wildcard);
}
else
{
$wildcard = undef;
}
}
# Get subdirectories.
my @dirs;
if ($wildcard)
{
@dirs = grep { $dirs{$_}{parent} == $self->{fs_dir_id} &&
$dirs{$_}{name} =~ /$wildcard/ } keys %dirs;
}
else
{
@dirs = grep { $dirs{$_}{parent} == $self->{fs_dir_id} } keys %dirs;
}
my @result = ();
my $username = substr $self->{ftps}{user}, 0, 8;
foreach (@dirs)
{
my $dirh
= new Net::FTPServer::InMem::DirHandle ($self->{ftps},
$self->pathname . $dirs{$_}{name} . "/",
$_);
push @result, [ $dirs{$_}{name}, $dirh ];
}
# Get files.
my @files;
if ($wildcard)
{
@files = grep { $files{$_}{dir_id} == $self->{fs_dir_id} &&
$files{$_}{name} =~ /$wildcard/ } keys %files;
}
else
{
@files = grep { $files{$_}{dir_id} == $self->{fs_dir_id} } keys %files;
}
foreach (@files)
{
my $fileh
= new Net::FTPServer::InMem::FileHandle ($self->{ftps},
$self->pathname . $files{$_}{name},
$self->{fs_dir_id},
$_,
$files{$_}{content});
push @result, [ $files{$_}{name}, $fileh ];
}
return \@result;
}
sub list_status
{
my $self = shift;
my $wildcard = shift;
# Convert wildcard to regular expression.
if ($wildcard)
{
if ($wildcard ne "*")
{
$wildcard = $self->{ftps}->wildcard_to_regex ($wildcard);
}
else
{
$wildcard = undef;
}
}
# Get subdirectories.
my @dirs;
if ($wildcard)
{
@dirs = grep { $dirs{$_}{parent} == $self->{fs_dir_id} &&
$dirs{$_}{name} =~ /$wildcard/ } keys %dirs;
}
else
{
@dirs = grep { $dirs{$_}{parent} == $self->{fs_dir_id} } keys %dirs;
}
my @result = ();
my $username = substr $self->{ftps}{user}, 0, 8;
foreach (@dirs)
{
my $dirh
= new Net::FTPServer::InMem::DirHandle ($self->{ftps},
$self->pathname . $dirs{$_}{name} . "/",
$_);
my @status = $dirh->status;
push @result, [ $dirs{$_}{name}, $dirh, \@status ];
}
# Get files.
my @files;
if ($wildcard)
{
@files = grep { $files{$_}{dir_id} == $self->{fs_dir_id} &&
$files{$_}{name} =~ /$wildcard/ } keys %files;
}
else
{
@files = grep { $files{$_}{dir_id} == $self->{fs_dir_id} } keys %files;
}
foreach (@files)
{
my $fileh
= new Net::FTPServer::InMem::FileHandle ($self->{ftps},
$self->pathname . $files{$_}{name},
$self->{fs_dir_id},
$_,
$files{$_}{content});
my @status = $fileh->status;
push @result, [ $files{$_}{name}, $fileh, \@status ];
}
return \@result;
}
# Return the status of this directory.
sub status
{
my $self = shift;
my $username = substr $self->{ftps}{user}, 0, 8;
return ( 'd', 0755, 1, $username, "users", 1024, 0 );
}
# Move a directory to elsewhere.
sub move
{
my $self = shift;
my $dirh = shift;
my $filename = shift;
# You can't move the root directory. That would be bad :-)
return -1 if $self->is_root;
$dirs{$self->{fs_dir_id}}{parent} = $dirh->{fs_dir_id};
$dirs{$self->{fs_dir_id}}{name} = $filename;
return 0;
}
sub delete
{
my $self = shift;
delete $dirs{$self->{fs_dir_id}};
return 0;
}
# Create a subdirectory.
sub mkdir
{
my $self = shift;
my $dirname = shift;
$dirs{$next_dir_id++} = { name => $dirname, parent => $self->{fs_dir_id} };
return 0;
}
# Open or create a file in this directory.
sub open
{
my $self = shift;
my $filename = shift;
my $mode = shift;
if ($mode eq "r") # Open an existing file for reading.
{
foreach (keys %files)
{
if ($files{$_}{dir_id} == $self->{fs_dir_id} &&
$files{$_}{name} eq $filename)
{
return new IO::Scalar ($files{$_}{content});
}
}
return undef;
}
elsif ($mode eq "w") # Create/overwrite the file.
{
# If a file with the same name exists already, erase it.
foreach (keys %files)
{
if ($files{$_}{dir_id} == $self->{fs_dir_id} &&
$files{$_}{name} eq $filename)
{
delete $files{$_};
last;
}
}
my $content = "";
$files{$next_file_id++} = { dir_id => $self->{fs_dir_id},
name => $filename,
content => \$content };
return new IO::Scalar (\$content);
}
elsif ($mode eq "a") # Append to the file.
{
foreach (keys %files)
{
if ($files{$_}{dir_id} == $self->{fs_dir_id} &&
$files{$_}{name} eq $filename)
{
return new IO::Scalar ($files{$_}{content});
}
}
return undef;
}
else
{
croak "unknown file mode: $mode; use 'r', 'w' or 'a' instead";
}
}
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
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