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#!/usr/bin/perl
#  
#----------------------------------------------------------------------------
#
# This program was written by Clif Harden.
# It is uses the PERL LDAP, Tk, and Tk::JPEG modules.
# These modules are available from the PERL CPAN
# system.
#
# $Id: jpegDisplay.pl,v 1.2 2003/06/18 18:23:31 gbarr Exp $
#
# Purpose: This program is designed to retrieve jpeg photo data
#          from a LDAP directory.
#
#
# Revisions:
# $Log: jpegDisplay.pl,v $
# Revision 1.2  2003/06/18 18:23:31  gbarr
# Remove all references to :all as it is not recomended
#
# Revision 1.1  2001/03/12 14:01:46  gbarr
# New contrib scripts from Clif Harden
#
#
#
#

use Getopt::Std;
use Net::LDAP;
use Net::LDAP::Filter;
use Net::LDAP;
use Net::LDAP::Util qw(ldap_error_name ldap_error_text); 
use Tk;
use Tk::JPEG;

#
# Initialize opt hash.
# You can change the defaults to match your setup.
# This can eliminate the need for many of the input
# options on the command line.
# 
my %opt = (
  'b' => 'dc=harden,dc=org',
  'h' => 'localhost',
  'd' => 0,
  'D' => 'cn=manager',
  'w' => 'password',
  'V' => '3',
  'a' => 'cn',
  'v' => 'commonName'
);

if ( @ARGV == 0 ) 
{
#
# print usage message.
#
Usage();
}

#
# Get command line options.
# 

getopts('b:h:d:D:w:V:a:v:',\%opt);

#
# build filter string
#
my $match = "( $opt{'a'}=$opt{'v'}  )";

$jpegFile = "./$opt{'a'}=$opt{'v'}.jpg";

#
# create filter object
#
my $f = Net::LDAP::Filter->new($match) or die "Bad filter '$match'";

#
# make ldap connection to directory.
#
my $ldap = new Net::LDAP($opt{'h'},
                         timeout => 10,
                         debug => $opt{'d'},
                        ) or die $@;

#
# Bind to directory.
#
$ldap->bind($opt{'D'}, password => "$opt{'w'}", version => $opt{'V'}) or die $@;

#
# Search directory for record that matches filter 
#
$mesg = $ldap->search(
  base   => $opt{b},
  filter => $f,
  attrs  => ["jpegPhoto"],
) or die $@;

die $mesg->error,$mesg->code
	if $mesg->code;

#
# get record entry object
#
$entry = $mesg->entry();

if ( !defined($entry) )
{
    print "\n";
    print "No data for filter $match.\n" if ($mesg->count == 0) ;
    print "\n";
}
else
{
  my @attrs = sort $entry->attributes;
  my $max = 0;

  $dn = $entry->dn();

    my $attr = $entry->get_value("jpegPhoto");
    if(ref($attr)) 
      {
      $picture = @$attr[0];
      }
    else
     {
      print "\n";
      print "No jpegPhoto attribute for DN\n";
      print "$dn\n";
      print "\n";
      $ldap->unbind;
      exit;
     } 
}

#
# Store the jpeg data to a temp file.
#
open(TMP, "+>$jpegFile");
binmode(TMP);
$| = 1;

print TMP $picture;
close(TMP);

if ( !-e "$jpegFile" )
{
print "\n";
print "Could not create temporary jpeg file $jpegFile\n";
print "\n";
$ldap->unbind;
exit(1);
}

$ldap->unbind;

#
# Create a TK window to display the jpeg picture.
#
my $mw  = MainWindow->new();

my $list = $mw ->Listbox( -height => 1, width => length($dn)  );  
$list->pack( -side => "top" );  
$list->insert("end", $dn);                                                                                 
my $image = $mw->Photo(-file => $jpegFile, -format => "jpeg" );

print "\n";
print "Displaying jpegPhoto for\n";
print "$dn\n";
print "\n";

$mw->Label(-image => $image)->pack(-expand => 1, -fill => 'both');
$mw->Button(-text => 'Quit', -command => [destroy => $mw])->pack;
MainLoop;

unlink $jpegFile;

#----------------------------------------#
# Usage() - display simple usage message #
#----------------------------------------#
sub Usage
{
   print( "Usage: [-b] <base> | [-h] <host> | [-d] <number> | [-D] <DN> | [-w] <password> | [-a] <attribute> | [-v] <data>\n" );
   print( "\t-b    Search base.\n" );
   print( "\t-d    Debug mode.  Display debug messages to stdout.\n" );
   print( "\t-D    Authenication Distingushed Name.\n" );
   print( "\t-h    LDAP directory host computer.\n" );
   print( "\t-w    Authenication password.\n" );
   print( "\t-a    Attribute that will be incorporated into the search filter.\n" );
   print( "\t-v    Data that will be incorporated into the search filter.\n" );
   print( "\t-V    LDAP version of the LDAP directory.\n" );
   print( "\n" );
   print( "\t      Perldoc pod documentation is included in this script.\n" );
   print( "\t      To read the pod documentation do the following;\n" );
   print( "\t      perldoc <script name>\n" );
   print( "\n" );
   print( "\n" );
   exit( 1 );
}                                                                               

__END__

=head1 NAME

jpegDisplay.pl  -  A script to display a jpeg picture from jpegPhoto attribute of a LDAP directory entry.

=head1 SYNOPSIS

The intent of this script is to show the user how to retrieve and
display a jpeg photo from a LDAP directory entry.

This script has been tested on a OpenLDAP 2.0.7 directory server
and a Netscape 4.x LDAP directory server.

You may need to change the first line of the PERL jpegDisplay.pl script
to point to your file pathname of perl.

=head1 Input options.

 -b    Search base.
 -d    Debug mode.  Display debug messages to stdout.
 -D    Distingushed Name for authenication purposes.
 -h    LDAP directory host computer.
 -w    Authenication password.
 -a    Attribute that will be incorporated into the search filter.
 -v    Data that will be incorporated into the search filter.
 -V    LDAP version of the LDAP directory.


 Usage: jpegDisplay.pl -b <base> -h <host> -d <number> -D <DN> \
                    -w <password> -a <attribute> -v <data>

Inside the script is a opt hash that can be initialized to 
default values that can elminate the need for many of the 
input options on the command line.

-------------------------------------------------------------------

=head1 REQUIREMENTS

To use this program you will need the following.

At least PERL version 5.004.  You can get a stable version of PERL
from the following URL;
   http://cpan.org/src/index.html

Perl LDAP module.  You can get this from the following URL;
   ftp://ftp.duke.edu/pub/CPAN/modules/by-module/Net/

Perl Tk.800.22 module.  You can get this from the following URL;
   ftp://ftp.duke.edu/pub/CPAN/modules/by-module/Net/

Perl Tk-JPEG-2.014 module.  You can get this from the following URL;
   ftp://ftp.duke.edu/pub/CPAN/modules/by-module/Net/

Bundled inside each PERL module is instructions on how to install the
module into your PERL system.

-------------------------------------------------------------------

=head1 INSTALLING THE SCRIPT

Install the jpegDisplay.pl script anywhere you wish, I suggest
/usr/local/bin/jpegDisplay.pl.

-------------------------------------------------------------------

Since the script is in PERL, feel free to modify it if it does not
meet your needs.  This is one of the main reasons I did it in PERL.
If you make an addition to the code that you feel other individuals
could use let me know about it.  I may incorporate your code
into my code.

=head1 AUTHOR

Clif Harden <charden@pobox.com>
If you find any errors in the code please let me know at
charden@pobox.com.

=head1 COPYRIGHT

Copyright (c) 2001 Clif Harden. All rights reserved. This program is
free software; you can redistribute it and/or modify it under the same
terms as Perl itself.

=cut