/ 
DjVu-Detect-0.04
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/ DjVu::Detect

NAME

DjVu::Detect - Detect DjVu files.

SYNOPSIS

use DjVu::Detect qw(detect_djvu_file detect_djvu_chunk);

my $has_djvu_chunk = detect_djvu_chunk($file, $chunk_name);
my $is_djvu = detect_djvu_file($file);

DESCRIPTION

This Perl module detect DjVu files through magic string and detect if DjVu file has chunk type.

List of supported files: djvu

SUBROUTINES

detect_djvu_chunk

my $has_djvu_chunk = detect_djvu_chunk($file, $chunk_name);

Detect if DjVu file contain DjVu chunk.

Returns 1/0.

detect_djvu_file

my $is_djvu = detect_djvu_file($file);

Detect if file is DjVu file by magic string of IFF and first 'FORM' chunk.

Returns 1/0.

ERRORS

detect_djvu_chunk():
        Program 'djvudump' doesn't exists.

detect_dwg_file():
        Cannot close file '%s'.
        Cannot open file '%s'.

EXAMPLE1

use strict;
use warnings;

use DjVu::Detect qw(detect_djvu_file);
use File::Temp qw(tempfile);
use IO::Barf qw(barf);
use MIME::Base64;

# Data in base64.
my $data = <<'END';
QVQmVEZPUk0=
END

# Temp file.
my (undef, $temp_file) = tempfile();

# Save data to file.
barf($temp_file, decode_base64($data));

# Check file.
my $is_djvu = detect_djvu_file($temp_file);

# Print out.
if ($is_djvu) {
        print "File '$temp_file' is DjVu file.\n";
} else {
        print "File '$temp_file' isn't DjVu file.\n";
}

# Output like:
# File '%s' isn't DjVu file.

EXAMPLE2

use strict;
use warnings;

use DjVu::Detect qw(detect_djvu_file);

# Arguments.
if (@ARGV < 1) {
        print STDERR "Usage: $0 file\n";
        exit 1;
}
my $file = $ARGV[0];

# Check DjVu file.
my $is_djvu = detect_djvu_file($file);

# Print out.
if ($is_djvu) {
        print "File '$file' is DjVu file.\n";
} else {
        print "File '$file' isn't Djvu file.\n";
}

# Output:
# Usage: __SCRIPT__ file

DEPENDENCIES

Alien::DjVuLibre, Error::Pure, Exporter, File::Spec::Functions.

SEE ALSO

File::Find::Rule::DjVu

Common rules for searching DjVu files.

REPOSITORY

https://github.com/michal-josef-spacek/DjVu-Detect

TEST FILES

Test file 11a7ffc0-c61e-11e6-ac1c-001018b5eb5c.djvu is generated from scanned book edition from http://www.digitalniknihovna.cz/mzk/view/uuid:814e66a0-b6df-11e6-88f6-005056827e52?page=uuid:11a7ffc0-c61e-11e6-ac1c-001018b5eb5c

AUTHOR

Michal Josef Špaček mailto:skim@cpan.org

http://skim.cz

LICENSE AND COPYRIGHT

© 2021-2023 Michal Josef Špaček

BSD 2-Clause License

VERSION

0.04