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
  11 # under the terms of the GNU General Public License as published by
  12 # the Free Software Foundation; either version 3 of the License, or
  13 # (at your option) any later version.
  14 #
  15 # Koha is distributed in the hope that it will be useful, but
  16 # WITHOUT ANY WARRANTY; without even the implied warranty of
  17 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18 # GNU General Public License for more details.
  19 #
  20 # You should have received a copy of the GNU General Public License
  21 # along with Koha; if not, see <http://www.gnu.org/licenses>.
  22 #
  23 #
  24 #
  25
  26 use Modern::Perl;
  27
  28 use CGI qw ( -utf8 );    #qw(:standard escapeHTML);
  29 use C4::Context;
  30 use C4::Images;
  31
  32 $| = 1;
  33
  34 my $DEBUG = 0;
  35 my $data  = new CGI;
  36 my $imagenumber;
  37
  38 =head1 NAME
  39
  40 image.pl - Script for retrieving and formatting local cover images for display
  41
  42 =head1 SYNOPSIS
  43
  44 <img src="image.pl?imagenumber=X" />
  45 <img src="image.pl?biblionumber=X" />
  46 <img src="image.pl?imagenumber=X&thumbnail=1" />
  47 <img src="image.pl?biblionumber=X&thumbnail=1" />
  48
  49 =head1 DESCRIPTION
  50
  51 This script, when called from within HTML and passed a valid imagenumber or
  52 biblionumber, will retrieve the image data associated with that biblionumber
  53 if one exists, format it in proper HTML format and pass it back to be displayed.
  54 If the parameter thumbnail has been provided, a thumbnail will be returned
  55 rather than the full-size image. When a biblionumber is provided rather than an
  56 imagenumber, a random image is selected.
  57
  58 =cut
  59
  60 my ( $image, $mimetype ) = C4::Images->NoImage;
  61 if ( C4::Context->preference("LocalCoverImages") ) {
  62     if ( defined $data->param('imagenumber') ) {
  63         $imagenumber = $data->param('imagenumber');
  64     }
  65     elsif ( defined $data->param('biblionumber') ) {
  66         my @imagenumbers = ListImagesForBiblio( $data->multi_param('biblionumber') );
  67         if (@imagenumbers) {
  68             $imagenumber = $imagenumbers[0];
  69         }
  70         else {
  71             warn "No images for this biblio" if $DEBUG;
  72         }
  73     }
  74     else {
  75         $imagenumber = shift;
  76     }
  77
  78     if ($imagenumber) {
  79         warn "imagenumber passed in: $imagenumber" if $DEBUG;
  80         my $imagedata = RetrieveImage($imagenumber);
  81         if ($imagedata) {
  82             if ( $data->param('thumbnail') ) {
  83                 $image = $imagedata->{'thumbnail'};
  84             }
  85             else {
  86                 $image = $imagedata->{'imagefile'};
  87             }
  88             $mimetype = $imagedata->{'mimetype'};
  89         }
  90     }
  91 }
  92 print $data->header(
  93     -type            => $mimetype,
  94     -expires         => '+30m',
  95     -Content_Length  => length($image)
  96 ), $image;
  97
  98 =head1 AUTHOR
  99
 100 Chris Nighswonger cnighswonger <at> foundations <dot> edu
 101
 102 modified for local cover images by Koustubha Kale kmkale <at> anantcorp <dot> com
 103
 104 =cut