NAME
JSON::DWIW - JSON converter that Does What I WantSYNOPSIS
my $json_obj = JSON::DWIW->new;
my $data = $json_obj->from_json($json_str);
my $str = $json_obj->to_json($data);
my $data = JSON::DWIW->from_json($json_str);
my $str = JSON:DWIW->to_json($data);DESCRIPTION
Other JSON modules require setting several parameters before calling the conversion methods to do what I want. This module does things by default that I think should be done when working with JSON in Perl. This module also encodes and decodes faster than JSON.pm and JSON::Syck in my benchmarks.
This means that any piece of data in Perl will get converted to something in JSON instead of throwing an exception. It also means that output will be strict JSON, while accepted input will be flexible, without having to set any options.
Encoding
Perl objects get encoded as their underlying data structure. For example, a blessed hash ref will be represented as an object in JSON, a blessed array will be represented as an array. etc. A reference to a scalar is dereferenced and represented as the scalar itself. Globs, filehandles, etc., get stringified.
Decoding
When decoding, null, true, and false become undef, 1, and 0, repectively.
The parser is flexible in what it accepts and handles some things not in the JSON spec:
- quotes
-
Both single and double quotes are allowed for quoting a string, e.g., [ "string1", 'string2' ] - bare keys
-
Object/hash keys can be bare if they look like an identifier, e.g., { var1: "myval1", var2: "myval2" } - extra commas
-
Extra commas in objects/hashes and arrays are ignored, e.g., [1,2,3,,,4,] becomes a 4 element array containing 1, 2, 3, and 4.
METHODS
my $json_str = to_json($data)
Returns the JSON representation of $data (arbitrary
datastructure). See http://www.json.org/ for details.
Aliases: toJson, toJSON, objToJsonmy ($data, $error_msg) = from_json($json_str)
Returns the Perl data structure for the given JSON string. The
value for true becomes 1, false becomes 0, and null gets
converted to undef.
Called in list context, this method returns a where the first
element is the data and the second element is the error message,
if any. If $error_msg is defined, there was a problem parsing
the JSON string, and $data will be undef.
Aliases: fromJson, fromJSON, jsonToObjBENCHMARKS
Latest benchmarks against JSON and JSON::Syck run on my MacBook
Pro:
Using a small data set:
Encode (50000 iterations):
==========================
Rate JSON JSON::Syck JSON::DWIW
JSON 2670/s -- -72% -89%
JSON::Syck 9416/s 253% -- -61%
JSON::DWIW 24155/s 805% 157% --
Decode (50000 iterations):
==========================
Rate JSON JSON::Syck JSON::DWIW
JSON 2300/s -- -81% -93%
JSON::Syck 12195/s 430% -- -64%
JSON::DWIW 33784/s 1369% 177% --
Using a larger data set (8KB JSON string) generated from Yahoo!
Local's search API (http://nanoref.com/yahooapis/mgPdGg)
Encode (1000 iterations):
=========================
Rate JSON JSON::Syck JSON::DWIW
JSON 135/s -- -54% -74%
JSON::Syck 290/s 115% -- -45%
JSON::DWIW 526/s 291% 82% --
Decode (1000 iterations):
=========================
Rate JSON JSON::Syck JSON::DWIW
JSON 35.9/s -- -92% -94%
JSON::Syck 444/s 1137% -- -25%
JSON::DWIW 595/s 1557% 34% --DEPENDENCIES
Perl 5.6 or later
AUTHOR
Don Owens <don@regexguy.com>
LICENSE AND COPYRIGHT
Copyright (c) 2007 Don Owens <don@regexguy.com>. All rights reserved.
This is free software; you can redistribute it and/or modify it under the same terms as Perl itself. See perlartistic.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
SEE ALSO
JSON
JSON::Syck (included in YAML::Syck)VERSION
0.03