File Content: Syck.pm package JSON::Syck; use strict; use vars qw( $VERSION @EXPORT_OK @ISA ); use Exporter; use YAML::Syck (); BEGIN { $VERSION = '1.27'; @EXPORT_OK = qw( Load Dump LoadFile DumpFile DumpInto ); @ISA = 'Exporter'; *Load = \&YAML::Syck::LoadJSON; *Dump = \&YAML::Syck::DumpJSON; } sub DumpFile { my $file = shift; if ( YAML::Syck::_is_glob($file) ) { my $err = YAML::Syck::DumpJSONFile( $_[0], $file ); if ($err) { $! = 0 + $err; die "Error writing to filehandle $file: $!\n"; } } else { open( my $fh, '>', $file ) or die "Cannot write to $file: $!"; my $err = YAML::Syck::DumpJSONFile( $_[0], $fh ); if ($err) { $! = 0 + $err; die "Error writing to file $file: $!\n"; } close $fh or die "Error writing to file $file: $!\n"; } return 1; } sub LoadFile { my $file = shift; if ( YAML::Syck::_is_glob($file) ) { YAML::Syck::LoadJSON( do { local $/; <$file> } ); } else { if ( !-e $file || -z $file ) { die("'$file' is non-existent or empty"); } open( my $fh, '<', $file ) or die "Cannot read from $file: $!"; YAML::Syck::LoadJSON( do { local $/; <$fh> } ); } } sub DumpInto { my $bufref = shift; ( ref $bufref ) or die "DumpInto not given reference to output buffer\n"; YAML::Syck::DumpJSONInto( $_[0], $bufref ); 1; } $JSON::Syck::ImplicitTyping = 1; $JSON::Syck::MaxDepth = 512; $JSON::Syck::Headless = 1; $JSON::Syck::ImplicitUnicode = 0; $JSON::Syck::SingleQuote = 0; 1; __END__ =head1 NAME JSON::Syck - JSON is YAML (but consider using L<JSON::XS> instead!) =head1 SYNOPSIS use JSON::Syck; # no exports by default my $data = JSON::Syck::Load($json); my $json = JSON::Syck::Dump($data); # $file can be an IO object, or a filename my $data = JSON::Syck::LoadFile($file); JSON::Syck::DumpFile($file, $data); # Dump into a pre-existing buffer my $json; JSON::Syck::DumpInto(\$json, $data); =head1 DESCRIPTION JSON::Syck is a syck implementation of JSON parsing and generation. Because JSON is YAML (L<http://redhanded.hobix.com/inspect/yamlIsJson.html>), using syck gives you a fast and memory-efficient parser and dumper for JSON data representation. However, a newer module L<JSON::XS>, has since emerged. It is more flexible, efficient and robust, so please consider using it instead of this module. =head1 DIFFERENCE WITH JSON You might want to know the difference between the I<JSON> module and this one. Since JSON is a pure-perl module and JSON::Syck is based on libsyck, JSON::Syck is supposed to be very fast and memory efficient. See chansen's benchmark table at L<http://idisk.mac.com/christian.hansen/Public/perl/serialize.pl> JSON.pm comes with dozens of ways to do the same thing and lots of options, while JSON::Syck doesn't. There's only C<Load> and C<Dump>. Oh, and JSON::Syck doesn't use camelCase method names :-) =head1 REFERENCES =head2 SCALAR REFERENCE For now, when you pass a scalar reference to JSON::Syck, it dereferences to get the actual scalar value. JSON::Syck raises an exception when you pass in circular references. If you want to serialize self refernecing stuff, you should use YAML which supports it. =head2 SUBROUTINE REFERENCE When you pass subroutine reference, JSON::Syck dumps it as null. =head1 UTF-8 FLAGS By default this module doesn't touch any of utf-8 flags set in strings, and assumes UTF-8 bytes to be passed and emit. However, when you set C<$JSON::Syck::ImplicitUnicode> to 1, this module properly decodes UTF-8 binaries and sets UTF-8 flag everywhere, as in: JSON (UTF-8 bytes) => Perl (UTF-8 flagged) JSON (UTF-8 flagged) => Perl (UTF-8 flagged) Perl (UTF-8 bytes) => JSON (UTF-8 flagged) Perl (UTF-8 flagged) => JSON (UTF-8 flagged) By default, JSON::Syck::Dump will only transverse up to 512 levels of a datastructure in order to avoid an infinite loop when it is presented with an circular reference. However, you set C<$JSON::Syck::MaxLevels> to a larger value if you have very complex structures. Unfortunately, there's no implicit way to dump Perl UTF-8 flagged data structure to utf-8 encoded JSON. To do this, simply use Encode module, e.g.: use Encode; use JSON::Syck qw(Dump); my $json = encode_utf8( Dump($data) ); Alternatively you can use Encode::JavaScript::UCS to encode Unicode strings as in I<%uXXXX> form. use Encode; use Encode::JavaScript::UCS; use JSON::Syck qw(Dump); my $json_unicode_escaped = encode( 'JavaScript-UCS', Dump($data) ); =head1 QUOTING According to the JSON specification, all JSON strings are to be double-quoted. However, when embedding JavaScript in HTML attributes, it may be more convenient to use single quotes. Set C<$JSON::Syck::SingleQuote> to 1 will make both C<Dump> and C<Load> expect single-quoted string literals. =head1 BUGS Dumping into tied (or other magic variables) with C<DumpInto> might not work properly in all cases. When dumping with C<DumpFile>, some spacing might be wrong and C<$JSON::Syck::SingleQuote> might be handled incorrectly. =head1 SEE ALSO L<JSON::XS>, L<YAML::Syck> =head1 AUTHORS Audrey Tang E<lt>cpan@audreyt.orgE<gt> Tatsuhiko Miyagawa E<lt>miyagawa@gmail.comE<gt> =head1 COPYRIGHT Copyright 2005-2009 by Audrey Tang E<lt>cpan@audreyt.orgE<gt>. This software is released under the MIT license cited below. The F<libsyck> code bundled with this library is released by "why the lucky stiff", under a BSD-style license. See the F<COPYING> file for details. =head2 The "MIT" License Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. =cut Submit