catalogue/image.pl

   1 #!/usr/bin/perl
   2 #
   3 # Copyright (C) 2011 C & P Bibliography Services
   4 # Jared Camins-Esakov <jcamins@cpbibliograpy.com>
   5 #
   6 # based on patronimage.pl
   7 #
   8 # This file is part of Koha.
   9 #
  10 # Koha is free software; you can redistribute it and/or modify it under the
  11 # terms of the GNU General Public License as published by the Free Software
  12 # Foundation; either version 2 of the License, or (at your option) any later
  13 # version.
  14 #
  15 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
  16 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  17 # A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
  18 #
  19 # You should have received a copy of the GNU General Public License along
  20 # with Koha; if not, write to the Free Software Foundation, Inc.,
  21 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  22 #
  23 #
  24 #
  25
  26 use strict;
  27 use warnings;
  28
  29 use CGI;    #qw(:standard escapeHTML);
  30 use C4::Context;
  31 use C4::Images;
  32
  33 $| = 1;
  34
  35 my $DEBUG = 0;
  36 my $data  = new CGI;
  37 my $imagenumber;
  38
  39 =head1 NAME
  40
  41 image.pl - Script for retrieving and formatting local cover images for display
  42
  43 =head1 SYNOPSIS
  44
  45 <img src="image.pl?imagenumber=X" />
  46 <img src="image.pl?biblionumber=X" />
  47 <img src="image.pl?imagenumber=X&thumbnail=1" />
  48 <img src="image.pl?biblionumber=X&thumbnail=1" />
  49
  50 =head1 DESCRIPTION
  51
  52 This script, when called from within HTML and passed a valid imagenumber or
  53 biblionumber, will retrieve the image data associated with that biblionumber
  54 if one exists, format it in proper HTML format and pass it back to be displayed.
  55 If the parameter thumbnail has been provided, a thumbnail will be returned
  56 rather than the full-size image. When a biblionumber is provided rather than an
  57 imagenumber, a random image is selected.
  58
  59 =cut
  60
  61 my ( $image, $mimetype ) = C4::Images->NoImage;
  62 if ( C4::Context->preference("LocalCoverImages") ) {
  63     if ( defined $data->param('imagenumber') ) {
  64         $imagenumber = $data->param('imagenumber');
  65     }
  66     elsif ( defined $data->param('biblionumber') ) {
  67         my @imagenumbers = ListImagesForBiblio( $data->param('biblionumber') );
  68         if (@imagenumbers) {
  69             $imagenumber = $imagenumbers[0];
  70         }
  71         else {
  72             warn "No images for this biblio" if $DEBUG;
  73         }
  74     }
  75     else {
  76         $imagenumber = shift;
  77     }
  78
  79     if ($imagenumber) {
  80         warn "imagenumber passed in: $imagenumber" if $DEBUG;
  81         my $imagedata = RetrieveImage($imagenumber);
  82         if ($imagedata) {
  83             if ( $data->param('thumbnail') ) {
  84                 $image = $imagedata->{'thumbnail'};
  85             }
  86             else {
  87                 $image = $imagedata->{'imagefile'};
  88             }
  89             $mimetype = $imagedata->{'mimetype'};
  90         }
  91     }
  92 }
  93 print $data->header(
  94     -type            => $mimetype,
  95     -expires         => '+30m',
  96     -Content_Length  => length($image)
  97 ), $image;
  98
  99 =head1 AUTHOR
 100
 101 Chris Nighswonger cnighswonger <at> foundations <dot> edu
 102
 103 modified for local cover images by Koustubha Kale kmkale <at> anantcorp <dot> com
 104
 105 =cut