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#!/usr/bin/perl
use strict;
use Getopt::Long;
use JSON::PP ();
my $VERSION = '1.00';
# imported from JSON-XS/bin/json_xs
my %allow_json_opt = map { $_ => 1 } qw(
ascii latin1 utf8 pretty indent space_before space_after relaxed canonical allow_nonref
allow_singlequote allow_barekey allow_bignum loose escape_slash
);
GetOptions(
'v' => \( my $opt_verbose ),
'f=s' => \( my $opt_from = 'json' ),
't=s' => \( my $opt_to = 'json' ),
'json_opt=s' => \( my $json_opt = 'pretty' ),
'V' => \( my $version ),
) or die "Usage: $0 [-v] -f from_format [-t to_format]\n";
if ( $version ) {
print "$VERSION\n";
exit;
}
$json_opt = '' if $json_opt eq '-';
my @json_opt = grep { $allow_json_opt{ $_ } or die "'$_' is invalid json opttion" } split/,/, $json_opt;
my %F = (
'json' => sub {
my $json = JSON::PP->new;
$json->$_() for @json_opt;
$json->decode( $_ );
},
'eval' => sub {
my $v = eval "no strict;\n#line 1 \"input\"\n$_";
die "$@" if $@;
return $v;
},
);
my %T = (
'null' => sub { "" },
'json' => sub {
my $json = JSON::PP->new;
$json->$_() for @json_opt;
$json->encode( $_ );
},
'dumper' => sub {
require Data::Dumper;
Data::Dumper::Dumper($_)
},
);
$F{$opt_from}
or die "$opt_from: not a valid fromformat\n";
$T{$opt_to}
or die "$opt_from: not a valid toformat\n";
local $/;
$_ = <STDIN>;
$_ = $F{$opt_from}->();
$_ = $T{$opt_to}->();
print $_;
__END__
=pod
=encoding utf8
=head1 NAME
json_pp - JSON::PP command utility
=head1 SYNOPSIS
json_pp [-v] [-f from_format] [-t to_format] [-json_opt options_to_json]
=head1 DESCRIPTION
json_pp converts between some input and output formats (one of them is JSON).
This program was copied from L<json_xs> and modified.
The default input format is json and the default output format is json with pretty option.
=head1 OPTIONS
=head2 -f
-f from_format
Reads a data in the given format from STDIN.
Format types:
=over
=item json
as JSON
=item eval
as Perl code
=back
=head2 -t
Writes a data in the given format to STDOUT.
=over
=item null
no action.
=item json
as JSON
=item dumper
as Data::Dumper
=back
=head2 -json_opt
options to JSON::PP
Acceptable options are:
ascii latin1 utf8 pretty indent space_before space_after relaxed canonical allow_nonref
allow_singlequote allow_barekey allow_bignum loose escape_slash
=head2 -v
Verbose option, but currently no action in fact.
=head2 -V
Prints version and exits.
=head1 EXAMPLES
$ perl -e'print q|{"foo":"あい","bar":1234567890000000000000000}|' |\
json_pp -f json -t dumper -json_opt pretty,utf8,allow_bignum
$VAR1 = {
'bar' => bless( {
'value' => [
'0000000',
'0000000',
'5678900',
'1234'
],
'sign' => '+'
}, 'Math::BigInt' ),
'foo' => "\x{3042}\x{3044}"
};
$ perl -e'print q|{"foo":"あい","bar":1234567890000000000000000}|' |\
json_pp -f json -t dumper -json_opt pretty
$VAR1 = {
'bar' => '1234567890000000000000000',
'foo' => "\x{e3}\x{81}\x{82}\x{e3}\x{81}\x{84}"
};
=head1 SEE ALSO
L<JSON::PP>, L<json_xs>
=head1 AUTHOR
Makamaka Hannyaharamitu, E<lt>makamaka[at]cpan.orgE<gt>
=head1 COPYRIGHT AND LICENSE
Copyright 2010 by Makamaka Hannyaharamitu
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
=cut
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