—

              
#!/usr/bin/env perl
use warnings;
use strict;
use XML::Compile::Schema ();
use XML::Compile::Util   qw/type_of_node/;
use Getopt::Long         qw/GetOptions :config gnu_compat bundling/;
use JSON::XS             qw/encode_json/;
my ($xml_input, $root_type, @schemas, $bigints, $bigfloats, $json_out);
my $mixed  = 'TEXTUAL';
my $keep_root = 1;
GetOptions
   'bigints|bi|b!' => \$bigints
 , 'bigfloats|bf'  => \$bigfloats
 , 'output|o=s'    => \$json_out
 , 'schema|s=s'    => \@schemas
 , 'type|t=s'      => \$root_type
 , 'xml|x=s'       => \$xml_input
 , 'mixed=s'       => \$mixed
 , 'keep-root|r!'  => \$keep_root
   or exit 1;
$xml_input = '-' if @schemas && !defined $xml_input;
$json_out  = '-' unless defined $json_out;
if(@ARGV)
{   die "ERROR: either use options or no options, not mixed\n"
        if defined $xml_input && @ARGV;
    ($xml_input, @schemas) = @ARGV;
}
defined $xml_input
    or die "ERROR: no input message specified\n";
@schemas
    or die "ERROR: no schema's specified\n";
@schemas   = map { split /\,/ } @schemas;
my $parser = XML::LibXML->new;
my $msg    = $xml_input eq '-'
           ? $parser->parse_fh(\*STDIN)
           : $parser->parse_file($xml_input);
my $top    = $msg->documentElement;
$root_type ||= type_of_node $top;
my $schema = XML::Compile::Schema->new( \@schemas );
my $read   = $schema->compile
  ( READER          => $root_type
  , sloppy_integers => !$bigints
  , sloppy_floats   => !$bigfloats
  , json_friendly   => 1
  , mixed_elements  => $mixed
  );
my $ast  = $read->($top);
$ast     = { $top->localname => $ast }
    if $keep_root;
my $data = encode_json $ast;
if($json_out eq '-')
{   print $data;
}
else
{   open OUT, ">:utf8", $json_out
        or die "ERROR: cannot write json to $json_out: $!\n";
    print OUT $data;
    close OUT
        or die "ERROR: write error for $json_out: $!\n";
}
exit 0;
__END__
HideShow 79 lines of Pod
=head1 NAME
xml2json - convert an XML message with a schema into JSON
=head1 SYNOPSIS
 xml2json xml-file schema-file(s)  >json-file
 xml2json -x xml-file -s schema-files -o json-file
=head1 DESCRIPTION
Convert an XML message into JSON with the same structure.  A schema
is required to enforce the correct syntax, especially for optionally
repeated elements.
=head2 Options
You can either specify an XML message filename and one or more
schema filenames as arguments, or use the options.
=over 4
=item --xml|-x filename
The file which contains the xml message.  A single dash means "stdin".
=item --schema|-s filename(s)
This option can be repeated, or the filenames separated by comma's, if
you have more than one schema file to parse.  All imported and included
schema components have to be provided explicitly.
=item --bigints|-b  (boolean)
By default, the translation is a little sloppy: Integer types are defined
to support at least 18 digits in XML.  However, this is usually unnecessary
large and unreadible in JSON.
=item --no-keep-root  (boolean)
Do not include the top node in the output.
=item --mixed HOW
[1.32] How to treat mixed elements.  The default is TEXTUAL.  Other values
are C<ATTRIBUTES>, C<XML_STRING>, and C<STRUCTURAL>.  More details
about mixed_elements in XML::Compile::Translate::Reader.
=item --type|-t TYPE
The type of the root element, required if the XML is not namespaceo
qualified, although the schema is.  If not specified, the root element
is automatically inspected.
The TYPE notation is C<{namespace}localname>.  Be warned to use quoting
on the UNIX command-line, because curly braces have a special meaning
for the shell.
=item --output|-o filename
By default (or when the filename is a dash), the output is printed to stdout.
=back
=head1 SEE ALSO
This module is part of Perl's XML-Compile distribution.
Website: F<http://perl.overmeer.net/xml-compile/>
=head1 LICENSE
Copyrights 2017 by Slaven Rezic and Mark Overmeer. For other contributors
see ChangeLog.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
See F<http://www.perl.com/perl/misc/Artistic.html>