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* lib/json.rb, lib/json/*: moved to ext/json/lib.

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M    trunk/ChangeLog
D    trunk/lib/json
D    trunk/lib/json.rb
A    trunk/ext/json/lib
A    trunk/ext/json/lib/json
A    trunk/ext/json/lib/json.rb
A    trunk/ext/json/extconf.rb


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14100 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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naruse 2007-12-04 08:09:44 +00:00
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require 'json/common'
# = json - JSON for Ruby
#
# == Description
#
# This is a implementation of the JSON specification according to RFC 4627
# (http://www.ietf.org/rfc/rfc4627.txt). Starting from version 1.0.0 on there
# will be two variants available:
#
# * A pure ruby variant, that relies on the iconv and the stringscan
# extensions, which are both part of the ruby standard library.
# * The quite a bit faster C extension variant, which is in parts implemented
# in C and comes with its own unicode conversion functions and a parser
# generated by the ragel state machine compiler
# (http://www.cs.queensu.ca/~thurston/ragel).
#
# Both variants of the JSON generator escape all non-ASCII an control
# characters with \uXXXX escape sequences, and support UTF-16 surrogate pairs
# in order to be able to generate the whole range of unicode code points. This
# means that generated JSON text is encoded as UTF-8 (because ASCII is a subset
# of UTF-8) and at the same time avoids decoding problems for receiving
# endpoints, that don't expect UTF-8 encoded texts. On the negative side this
# may lead to a bit longer strings than necessarry.
#
# All strings, that are to be encoded as JSON strings, should be UTF-8 byte
# sequences on the Ruby side. To encode raw binary strings, that aren't UTF-8
# encoded, please use the to_json_raw_object method of String (which produces
# an object, that contains a byte array) and decode the result on the receiving
# endpoint.
#
# == Author
#
# Florian Frank <mailto:flori@ping.de>
#
# == License
#
# This software is distributed under the same license as Ruby itself, see
# http://www.ruby-lang.org/en/LICENSE.txt.
#
# == Download
#
# The latest version of this library can be downloaded at
#
# * http://rubyforge.org/frs?group_id=953
#
# Online Documentation should be located at
#
# * http://json.rubyforge.org
#
# == Usage
#
# To use JSON you can
# require 'json'
# to load the installed variant (either the extension 'json' or the pure
# variant 'json_pure'). If you have installed the extension variant, you can
# pick either the extension variant or the pure variant by typing
# require 'json/ext'
# or
# require 'json/pure'
#
# You can choose to load a set of common additions to ruby core's objects if
# you
# require 'json/add/core'
#
# After requiring this you can, e. g., serialise/deserialise Ruby ranges:
#
# JSON JSON(1..10) # => 1..10
#
# To find out how to add JSON support to other or your own classes, read the
# Examples section below.
#
# To get the best compatibility to rails' JSON implementation, you can
# require 'json/add/rails'
#
# Both of the additions attempt to require 'json' (like above) first, if it has
# not been required yet.
#
# == Speed Comparisons
#
# I have created some benchmark results (see the benchmarks subdir of the
# package) for the JSON-Parser to estimate the speed up in the C extension:
#
# JSON::Pure::Parser:: 28.90 calls/second
# JSON::Ext::Parser:: 505.50 calls/second
#
# This is ca. <b>17.5</b> times the speed of the pure Ruby implementation.
#
# I have benchmarked the JSON-Generator as well. This generates a few more
# values, because there are different modes, that also influence the achieved
# speed:
#
# * JSON::Pure::Generator:
# generate:: 35.06 calls/second
# pretty_generate:: 34.00 calls/second
# fast_generate:: 41.06 calls/second
#
# * JSON::Ext::Generator:
# generate:: 492.11 calls/second
# pretty_generate:: 348.85 calls/second
# fast_generate:: 541.60 calls/second
#
# * Speedup Ext/Pure:
# generate safe:: 14.0 times
# generate pretty:: 10.3 times
# generate fast:: 13.2 times
#
# The rails framework includes a generator as well, also it seems to be rather
# slow: I measured only 23.87 calls/second which is slower than any of my pure
# generator results. Here a comparison of the different speedups with the Rails
# measurement as the divisor:
#
# * Speedup Pure/Rails:
# generate safe:: 1.5 times
# generate pretty:: 1.4 times
# generate fast:: 1.7 times
#
# * Speedup Ext/Rails:
# generate safe:: 20.6 times
# generate pretty:: 14.6 times
# generate fast:: 22.7 times
#
# To achieve the fastest JSON text output, you can use the
# fast_generate/fast_unparse methods. Beware, that this will disable the
# checking for circular Ruby data structures, which may cause JSON to go into
# an infinite loop.
#
# == Examples
#
# To create a JSON text from a ruby data structure, you
# can call JSON.generate (or JSON.unparse) like that:
#
# json = JSON.generate [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
# # => "[1,2,{\"a\":3.141},false,true,null,\"4..10\"]"
#
# To create a valid JSON text you have to make sure, that the output is
# embedded in either a JSON array [] or a JSON object {}. The easiest way to do
# this, is by putting your values in a Ruby Array or Hash instance.
#
# To get back a ruby data structure from a JSON text, you have to call
# JSON.parse on it:
#
# JSON.parse json
# # => [1, 2, {"a"=>3.141}, false, true, nil, "4..10"]
#
# Note, that the range from the original data structure is a simple
# string now. The reason for this is, that JSON doesn't support ranges
# or arbitrary classes. In this case the json library falls back to call
# Object#to_json, which is the same as #to_s.to_json.
#
# It's possible to add JSON support serialization to arbitrary classes by
# simply implementing a more specialized version of the #to_json method, that
# should return a JSON object (a hash converted to JSON with #to_json) like
# this (don't forget the *a for all the arguments):
#
# class Range
# def to_json(*a)
# {
# 'json_class' => self.class.name, # = 'Range'
# 'data' => [ first, last, exclude_end? ]
# }.to_json(*a)
# end
# end
#
# The hash key 'json_class' is the class, that will be asked to deserialise the
# JSON representation later. In this case it's 'Range', but any namespace of
# the form 'A::B' or '::A::B' will do. All other keys are arbitrary and can be
# used to store the necessary data to configure the object to be deserialised.
#
# If a the key 'json_class' is found in a JSON object, the JSON parser checks
# if the given class responds to the json_create class method. If so, it is
# called with the JSON object converted to a Ruby hash. So a range can
# be deserialised by implementing Range.json_create like this:
#
# class Range
# def self.json_create(o)
# new(*o['data'])
# end
# end
#
# Now it possible to serialise/deserialise ranges as well:
#
# json = JSON.generate [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
# # => "[1,2,{\"a\":3.141},false,true,null,{\"json_class\":\"Range\",\"data\":[4,10,false]}]"
# JSON.parse json
# # => [1, 2, {"a"=>3.141}, false, true, nil, 4..10]
#
# JSON.generate always creates the shortest possible string representation of a
# ruby data structure in one line. This good for data storage or network
# protocols, but not so good for humans to read. Fortunately there's also
# JSON.pretty_generate (or JSON.pretty_generate) that creates a more
# readable output:
#
# puts JSON.pretty_generate([1, 2, {"a"=>3.141}, false, true, nil, 4..10])
# [
# 1,
# 2,
# {
# "a": 3.141
# },
# false,
# true,
# null,
# {
# "json_class": "Range",
# "data": [
# 4,
# 10,
# false
# ]
# }
# ]
#
# There are also the methods Kernel#j for unparse, and Kernel#jj for
# pretty_unparse output to the console, that work analogous to Core Ruby's p
# and the pp library's pp methods.
#
# The script tools/server.rb contains a small example if you want to test, how
# receiving a JSON object from a webrick server in your browser with the
# javasript prototype library (http://www.prototypejs.org) works.
#
module JSON
require 'json/version'
if VARIANT_BINARY
require 'json/ext'
else
begin
require 'json/ext'
rescue LoadError
require 'json/pure'
end
end
JSON_LOADED = true
end

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/* XPM */
static char * Array_xpm[] = {
"16 16 2 1",
" c None",
". c #000000",
" ",
" ",
" ",
" .......... ",
" . . ",
" . . ",
" . . ",
" . . ",
" . . ",
" . . ",
" . . ",
" . . ",
" .......... ",
" ",
" ",
" "};

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/* XPM */
static char * False_xpm[] = {
"16 16 2 1",
" c None",
". c #FF0000",
" ",
" ",
" ",
" ...... ",
" . ",
" . ",
" . ",
" ...... ",
" . ",
" . ",
" . ",
" . ",
" . ",
" ",
" ",
" "};

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/* XPM */
static char * Hash_xpm[] = {
"16 16 2 1",
" c None",
". c #000000",
" ",
" ",
" ",
" . . ",
" . . ",
" . . ",
" ......... ",
" . . ",
" . . ",
" ......... ",
" . . ",
" . . ",
" . . ",
" ",
" ",
" "};

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/* XPM */
static char * Key_xpm[] = {
"16 16 54 1",
" c None",
". c #110007",
"+ c #0E0900",
"@ c #000013",
"# c #070600",
"$ c #F6F006",
"% c #ECE711",
"& c #E5EE00",
"* c #16021E",
"= c #120900",
"- c #EDF12B",
"; c #000033",
"> c #0F0000",
", c #FFFE03",
"' c #E6E500",
") c #16021B",
"! c #F7F502",
"~ c #000E00",
"{ c #130000",
"] c #FFF000",
"^ c #FFE711",
"/ c #140005",
"( c #190025",
"_ c #E9DD27",
": c #E7DC04",
"< c #FFEC09",
"[ c #FFE707",
"} c #FFDE10",
"| c #150021",
"1 c #160700",
"2 c #FAF60E",
"3 c #EFE301",
"4 c #FEF300",
"5 c #E7E000",
"6 c #FFFF08",
"7 c #0E0206",
"8 c #040000",
"9 c #03052E",
"0 c #041212",
"a c #070300",
"b c #F2E713",
"c c #F9DE13",
"d c #36091E",
"e c #00001C",
"f c #1F0010",
"g c #FFF500",
"h c #DEDE00",
"i c #050A00",
"j c #FAF14A",
"k c #F5F200",
"l c #040404",
"m c #1A0D00",
"n c #EDE43D",
"o c #ECE007",
" ",
" ",
" .+@ ",
" #$%&* ",
" =-;>,') ",
" >!~{]^/ ",
" (_:<[}| ",
" 1234567 ",
" 890abcd ",
" efghi ",
" >jkl ",
" mnol ",
" >kl ",
" ll ",
" ",
" "};

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/* XPM */
static char * False_xpm[] = {
"16 16 2 1",
" c None",
". c #000000",
" ",
" ",
" ",
" ... ",
" . . ",
" . . ",
" . . ",
" . . ",
" . . ",
" . . ",
" . . ",
" . . ",
" ... ",
" ",
" ",
" "};

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/* XPM */
static char * Numeric_xpm[] = {
"16 16 9 1",
" c None",
". c #FF0000",
"+ c #0000FF",
"@ c #0023DB",
"# c #00EA14",
"$ c #00FF00",
"% c #004FAF",
"& c #0028D6",
"* c #00F20C",
" ",
" ",
" ",
" ... +++@#$$$$ ",
" .+ %& $$ ",
" . + $ ",
" . + $$ ",
" . ++$$$$ ",
" . + $$ ",
" . + $ ",
" . + $ ",
" . + $ $$ ",
" .....++++*$$ ",
" ",
" ",
" "};

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/* XPM */
static char * String_xpm[] = {
"16 16 77 1",
" c None",
". c #000000",
"+ c #040404",
"@ c #080806",
"# c #090606",
"$ c #EEEAE1",
"% c #E7E3DA",
"& c #E0DBD1",
"* c #D4B46F",
"= c #0C0906",
"- c #E3C072",
"; c #E4C072",
"> c #060505",
", c #0B0A08",
"' c #D5B264",
") c #D3AF5A",
"! c #080602",
"~ c #E1B863",
"{ c #DDB151",
"] c #DBAE4A",
"^ c #DDB152",
"/ c #DDB252",
"( c #070705",
"_ c #0C0A07",
": c #D3A33B",
"< c #020201",
"[ c #DAAA41",
"} c #040302",
"| c #E4D9BF",
"1 c #0B0907",
"2 c #030201",
"3 c #020200",
"4 c #C99115",
"5 c #080704",
"6 c #DBC8A2",
"7 c #E7D7B4",
"8 c #E0CD9E",
"9 c #080601",
"0 c #040400",
"a c #010100",
"b c #0B0B08",
"c c #DCBF83",
"d c #DCBC75",
"e c #DEB559",
"f c #040301",
"g c #BC8815",
"h c #120E07",
"i c #060402",
"j c #0A0804",
"k c #D4A747",
"l c #D6A12F",
"m c #0E0C05",
"n c #C8C1B0",
"o c #1D1B15",
"p c #D7AD51",
"q c #070502",
"r c #080804",
"s c #BC953B",
"t c #C4BDAD",
"u c #0B0807",
"v c #DBAC47",
"w c #1B150A",
"x c #B78A2C",
"y c #D8A83C",
"z c #D4A338",
"A c #0F0B03",
"B c #181105",
"C c #C59325",
"D c #C18E1F",
"E c #060600",
"F c #CC992D",
"G c #B98B25",
"H c #B3831F",
"I c #C08C1C",
"J c #060500",
"K c #0E0C03",
"L c #0D0A00",
" ",
" .+@# ",
" .$%&*= ",
" .-;>,')! ",
" .~. .{]. ",
" .^/. (_:< ",
" .[.}|$12 ",
" 345678}90 ",
" a2bcdefgh ",
" ijkl.mno ",
" <pq. rstu ",
" .]v. wx= ",
" .yzABCDE ",
" .FGHIJ ",
" 0KL0 ",
" "};

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/* XPM */
static char * TrueClass_xpm[] = {
"16 16 2 1",
" c None",
". c #0BF311",
" ",
" ",
" ",
" ......... ",
" . ",
" . ",
" . ",
" . ",
" . ",
" . ",
" . ",
" . ",
" . ",
" ",
" ",
" "};

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# This file contains implementations of ruby core's custom objects for
# serialisation/deserialisation.
unless Object.const_defined?(:JSON) and ::JSON.const_defined?(:JSON_LOADED) and
::JSON::JSON_LOADED
require 'json'
end
require 'date'
class Time
def self.json_create(object)
at(*object.values_at('s', 'u'))
end
def to_json(*args)
{
'json_class' => self.class.name.to_s,
's' => tv_sec,
'u' => tv_usec,
}.to_json(*args)
end
end
class Date
def self.json_create(object)
civil(*object.values_at('y', 'm', 'd', 'sg'))
end
def to_json(*args)
{
'json_class' => self.class.name.to_s,
'y' => year,
'm' => month,
'd' => day,
'sg' => @sg,
}.to_json(*args)
end
end
class DateTime
def self.json_create(object)
args = object.values_at('y', 'm', 'd', 'H', 'M', 'S')
of_a, of_b = object['of'].split('/')
args << Rational(of_a.to_i, of_b.to_i)
args << object['sg']
civil(*args)
end
def to_json(*args)
{
'json_class' => self.class.name.to_s,
'y' => year,
'm' => month,
'd' => day,
'H' => hour,
'M' => min,
'S' => sec,
'of' => offset.to_s,
'sg' => @sg,
}.to_json(*args)
end
end
class Range
def self.json_create(object)
new(*object['a'])
end
def to_json(*args)
{
'json_class' => self.class.name.to_s,
'a' => [ first, last, exclude_end? ]
}.to_json(*args)
end
end
class Struct
def self.json_create(object)
new(*object['v'])
end
def to_json(*args)
klass = self.class.name.to_s
klass.empty? and raise JSON::JSONError, "Only named structs are supported!"
{
'json_class' => klass,
'v' => values,
}.to_json(*args)
end
end
class Exception
def self.json_create(object)
result = new(object['m'])
result.set_backtrace object['b']
result
end
def to_json(*args)
{
'json_class' => self.class.name.to_s,
'm' => message,
'b' => backtrace,
}.to_json(*args)
end
end
class Regexp
def self.json_create(object)
new(object['s'], object['o'])
end
def to_json(*)
{
'json_class' => self.class.name.to_s,
'o' => options,
's' => source,
}.to_json
end
end

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# This file contains implementations of rails custom objects for
# serialisation/deserialisation.
unless Object.const_defined?(:JSON) and ::JSON.const_defined?(:JSON_LOADED) and
::JSON::JSON_LOADED
require 'json'
end
class Object
def self.json_create(object)
obj = new
for key, value in object
next if key == 'json_class'
instance_variable_set "@#{key}", value
end
obj
end
def to_json(*a)
result = {
'json_class' => self.class.name
}
instance_variables.inject(result) do |r, name|
r[name[1..-1]] = instance_variable_get name
r
end
result.to_json(*a)
end
end
class Symbol
def to_json(*a)
to_s.to_json(*a)
end
end
module Enumerable
def to_json(*a)
to_a.to_json(*a)
end
end
# class Regexp
# def to_json(*)
# inspect
# end
# end
#
# The above rails definition has some problems:
#
# 1. { 'foo' => /bar/ }.to_json # => "{foo: /bar/}"
# This isn't valid JSON, because the regular expression syntax is not
# defined in RFC 4627. (And unquoted strings are disallowed there, too.)
# Though it is valid Javascript.
#
# 2. { 'foo' => /bar/mix }.to_json # => "{foo: /bar/mix}"
# This isn't even valid Javascript.

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require 'json/version'
module JSON
class << self
# If _object_ is string like parse the string and return the parsed result
# as a Ruby data structure. Otherwise generate a JSON text from the Ruby
# data structure object and return it.
#
# The _opts_ argument is passed through to generate/parse respectively, see
# generate and parse for their documentation.
def [](object, opts = {})
if object.respond_to? :to_str
JSON.parse(object.to_str, opts => {})
else
JSON.generate(object, opts => {})
end
end
# Returns the JSON parser class, that is used by JSON. This might be either
# JSON::Ext::Parser or JSON::Pure::Parser.
attr_reader :parser
# Set the JSON parser class _parser_ to be used by JSON.
def parser=(parser) # :nodoc:
@parser = parser
remove_const :Parser if const_defined? :Parser
const_set :Parser, parser
end
# Return the constant located at _path_. The format of _path_ has to be
# either ::A::B::C or A::B::C. In any case A has to be located at the top
# level (absolute namespace path?). If there doesn't exist a constant at
# the given path, an ArgumentError is raised.
def deep_const_get(path) # :nodoc:
path = path.to_s
path.split(/::/).inject(Object) do |p, c|
case
when c.empty? then p
when p.const_defined?(c) then p.const_get(c)
else raise ArgumentError, "can't find const #{path}"
end
end
end
# Set the module _generator_ to be used by JSON.
def generator=(generator) # :nodoc:
@generator = generator
generator_methods = generator::GeneratorMethods
for const in generator_methods.constants
klass = deep_const_get(const)
modul = generator_methods.const_get(const)
klass.class_eval do
instance_methods(false).each do |m|
m.to_s == 'to_json' and remove_method m
end
include modul
end
end
self.state = generator::State
const_set :State, self.state
end
# Returns the JSON generator modul, that is used by JSON. This might be
# either JSON::Ext::Generator or JSON::Pure::Generator.
attr_reader :generator
# Returns the JSON generator state class, that is used by JSON. This might
# be either JSON::Ext::Generator::State or JSON::Pure::Generator::State.
attr_accessor :state
# This is create identifier, that is used to decide, if the _json_create_
# hook of a class should be called. It defaults to 'json_class'.
attr_accessor :create_id
end
self.create_id = 'json_class'
NaN = (-1.0) ** 0.5
Infinity = 1.0/0
MinusInfinity = -Infinity
# The base exception for JSON errors.
class JSONError < StandardError; end
# This exception is raised, if a parser error occurs.
class ParserError < JSONError; end
# This exception is raised, if the nesting of parsed datastructures is too
# deep.
class NestingError < ParserError; end
# This exception is raised, if a generator or unparser error occurs.
class GeneratorError < JSONError; end
# For backwards compatibility
UnparserError = GeneratorError
# If a circular data structure is encountered while unparsing
# this exception is raised.
class CircularDatastructure < GeneratorError; end
# This exception is raised, if the required unicode support is missing on the
# system. Usually this means, that the iconv library is not installed.
class MissingUnicodeSupport < JSONError; end
module_function
# Parse the JSON string _source_ into a Ruby data structure and return it.
#
# _opts_ can have the following
# keys:
# * *max_nesting*: The maximum depth of nesting allowed in the parsed data
# structures. Disable depth checking with :max_nesting => false, it defaults
# to 19.
# * *allow_nan*: If set to true, allow NaN, Infinity and -Infinity in
# defiance of RFC 4627 to be parsed by the Parser. This option defaults
# to false.
# * *create_additions*: If set to false, the Parser doesn't create
# additions even if a matchin class and create_id was found. This option
# defaults to true.
def parse(source, opts = {})
JSON.parser.new(source, opts).parse
end
# Parse the JSON string _source_ into a Ruby data structure and return it.
# The bang version of the parse method, defaults to the more dangerous values
# for the _opts_ hash, so be sure only to parse trusted _source_ strings.
#
# _opts_ can have the following keys:
# * *max_nesting*: The maximum depth of nesting allowed in the parsed data
# structures. Enable depth checking with :max_nesting => anInteger. The parse!
# methods defaults to not doing max depth checking: This can be dangerous,
# if someone wants to fill up your stack.
# * *allow_nan*: If set to true, allow NaN, Infinity, and -Infinity in
# defiance of RFC 4627 to be parsed by the Parser. This option defaults
# to true.
# * *create_additions*: If set to false, the Parser doesn't create
# additions even if a matchin class and create_id was found. This option
# defaults to true.
def parse!(source, opts = {})
opts = {
:max_nesting => false,
:allow_nan => true
}.update(opts)
JSON.parser.new(source, opts).parse
end
# Unparse the Ruby data structure _obj_ into a single line JSON string and
# return it. _state_ is
# * a JSON::State object,
# * or a Hash like object (responding to to_hash),
# * an object convertible into a hash by a to_h method,
# that is used as or to configure a State object.
#
# It defaults to a state object, that creates the shortest possible JSON text
# in one line, checks for circular data structures and doesn't allow NaN,
# Infinity, and -Infinity.
#
# A _state_ hash can have the following keys:
# * *indent*: a string used to indent levels (default: ''),
# * *space*: a string that is put after, a : or , delimiter (default: ''),
# * *space_before*: a string that is put before a : pair delimiter (default: ''),
# * *object_nl*: a string that is put at the end of a JSON object (default: ''),
# * *array_nl*: a string that is put at the end of a JSON array (default: ''),
# * *check_circular*: true if checking for circular data structures
# should be done (the default), false otherwise.
# * *allow_nan*: true if NaN, Infinity, and -Infinity should be
# generated, otherwise an exception is thrown, if these values are
# encountered. This options defaults to false.
# * *max_nesting*: The maximum depth of nesting allowed in the data
# structures from which JSON is to be generated. Disable depth checking
# with :max_nesting => false, it defaults to 19.
#
# See also the fast_generate for the fastest creation method with the least
# amount of sanity checks, and the pretty_generate method for some
# defaults for a pretty output.
def generate(obj, state = nil)
if state
state = State.from_state(state)
else
state = State.new
end
obj.to_json(state)
end
# :stopdoc:
# I want to deprecate these later, so I'll first be silent about them, and later delete them.
alias unparse generate
module_function :unparse
# :startdoc:
# Unparse the Ruby data structure _obj_ into a single line JSON string and
# return it. This method disables the checks for circles in Ruby objects, and
# also generates NaN, Infinity, and, -Infinity float values.
#
# *WARNING*: Be careful not to pass any Ruby data structures with circles as
# _obj_ argument, because this will cause JSON to go into an infinite loop.
def fast_generate(obj)
obj.to_json(nil)
end
# :stopdoc:
# I want to deprecate these later, so I'll first be silent about them, and later delete them.
alias fast_unparse fast_generate
module_function :fast_unparse
# :startdoc:
# Unparse the Ruby data structure _obj_ into a JSON string and return it. The
# returned string is a prettier form of the string returned by #unparse.
#
# The _opts_ argument can be used to configure the generator, see the
# generate method for a more detailed explanation.
def pretty_generate(obj, opts = nil)
state = JSON.state.new(
:indent => ' ',
:space => ' ',
:object_nl => "\n",
:array_nl => "\n",
:check_circular => true
)
if opts
if opts.respond_to? :to_hash
opts = opts.to_hash
elsif opts.respond_to? :to_h
opts = opts.to_h
else
raise TypeError, "can't convert #{opts.class} into Hash"
end
state.configure(opts)
end
obj.to_json(state)
end
# :stopdoc:
# I want to deprecate these later, so I'll first be silent about them, and later delete them.
alias pretty_unparse pretty_generate
module_function :pretty_unparse
# :startdoc:
# Load a ruby data structure from a JSON _source_ and return it. A source can
# either be a string like object, an IO like object, or an object responding
# to the read method. If _proc_ was given, it will be called with any nested
# Ruby object as an argument recursively in depth first order.
#
# This method is part of the implementation of the load/dump interface of
# Marshal and YAML.
def load(source, proc = nil)
if source.respond_to? :to_str
source = source.to_str
elsif source.respond_to? :to_io
source = source.to_io.read
else
source = source.read
end
result = parse(source, :max_nesting => false, :allow_nan => true)
recurse_proc(result, &proc) if proc
result
end
def recurse_proc(result, &proc)
case result
when Array
result.each { |x| recurse_proc x, &proc }
proc.call result
when Hash
result.each { |x, y| recurse_proc x, &proc; recurse_proc y, &proc }
proc.call result
else
proc.call result
end
end
private :recurse_proc
module_function :recurse_proc
alias restore load
module_function :restore
# Dumps _obj_ as a JSON string, i.e. calls generate on the object and returns
# the result.
#
# If anIO (an IO like object or an object that responds to the write method)
# was given, the resulting JSON is written to it.
#
# If the number of nested arrays or objects exceeds _limit_ an ArgumentError
# exception is raised. This argument is similar (but not exactly the
# same!) to the _limit_ argument in Marshal.dump.
#
# This method is part of the implementation of the load/dump interface of
# Marshal and YAML.
def dump(obj, anIO = nil, limit = nil)
if anIO and limit.nil?
anIO = anIO.to_io if anIO.respond_to?(:to_io)
unless anIO.respond_to?(:write)
limit = anIO
anIO = nil
end
end
limit ||= 0
result = generate(obj, :allow_nan => true, :max_nesting => limit)
if anIO
anIO.write result
anIO
else
result
end
rescue JSON::NestingError
raise ArgumentError, "exceed depth limit"
end
end
module ::Kernel
# Outputs _objs_ to STDOUT as JSON strings in the shortest form, that is in
# one line.
def j(*objs)
objs.each do |obj|
puts JSON::generate(obj, :allow_nan => true, :max_nesting => false)
end
nil
end
# Ouputs _objs_ to STDOUT as JSON strings in a pretty format, with
# indentation and over many lines.
def jj(*objs)
objs.each do |obj|
puts JSON::pretty_generate(obj, :allow_nan => true, :max_nesting => false)
end
nil
end
# If _object_ is string like parse the string and return the parsed result as
# a Ruby data structure. Otherwise generate a JSON text from the Ruby data
# structure object and return it.
#
# The _opts_ argument is passed through to generate/parse respectively, see
# generate and parse for their documentation.
def JSON(object, opts = {})
if object.respond_to? :to_str
JSON.parse(object.to_str, opts)
else
JSON.generate(object, opts)
end
end
end
class ::Class
# Returns true, if this class can be used to create an instance
# from a serialised JSON string. The class has to implement a class
# method _json_create_ that expects a hash as first parameter, which includes
# the required data.
def json_creatable?
respond_to?(:json_create)
end
end
# vim: set et sw=2 ts=2:

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require 'json/common'
module JSON
# This module holds all the modules/classes that implement JSON's
# functionality as C extensions.
module Ext
require 'json/ext/parser'
require 'json/ext/generator'
$DEBUG and warn "Using c extension for JSON."
JSON.parser = Parser
JSON.generator = Generator
end
end

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require 'json/common'
require 'json/pure/parser'
require 'json/pure/generator'
module JSON
begin
require 'iconv'
# An iconv instance to convert from UTF8 to UTF16 Big Endian.
UTF16toUTF8 = Iconv.new('utf-8', 'utf-16be') # :nodoc:
# An iconv instance to convert from UTF16 Big Endian to UTF8.
UTF8toUTF16 = Iconv.new('utf-16be', 'utf-8') # :nodoc:
UTF8toUTF16.iconv('no bom')
rescue Errno::EINVAL, Iconv::InvalidEncoding
# Iconv doesn't support big endian utf-16. Let's try to hack this manually
# into the converters.
begin
old_verbose, $VERBSOSE = $VERBOSE, nil
# An iconv instance to convert from UTF8 to UTF16 Big Endian.
UTF16toUTF8 = Iconv.new('utf-8', 'utf-16') # :nodoc:
# An iconv instance to convert from UTF16 Big Endian to UTF8.
UTF8toUTF16 = Iconv.new('utf-16', 'utf-8') # :nodoc:
UTF8toUTF16.iconv('no bom')
if UTF8toUTF16.iconv("\xe2\x82\xac") == "\xac\x20"
swapper = Class.new do
def initialize(iconv) # :nodoc:
@iconv = iconv
end
def iconv(string) # :nodoc:
result = @iconv.iconv(string)
JSON.swap!(result)
end
end
UTF8toUTF16 = swapper.new(UTF8toUTF16) # :nodoc:
end
if UTF16toUTF8.iconv("\xac\x20") == "\xe2\x82\xac"
swapper = Class.new do
def initialize(iconv) # :nodoc:
@iconv = iconv
end
def iconv(string) # :nodoc:
string = JSON.swap!(string.dup)
@iconv.iconv(string)
end
end
UTF16toUTF8 = swapper.new(UTF16toUTF8) # :nodoc:
end
rescue Errno::EINVAL, Iconv::InvalidEncoding
raise MissingUnicodeSupport, "iconv doesn't seem to support UTF-8/UTF-16 conversions"
ensure
$VERBOSE = old_verbose
end
rescue LoadError
raise MissingUnicodeSupport,
"iconv couldn't be loaded, which is required for UTF-8/UTF-16 conversions"
end
# Swap consecutive bytes of _string_ in place.
def self.swap!(string) # :nodoc:
0.upto(string.size / 2) do |i|
break unless string[2 * i + 1]
string[2 * i], string[2 * i + 1] = string[2 * i + 1], string[2 * i]
end
string
end
# This module holds all the modules/classes that implement JSON's
# functionality in pure ruby.
module Pure
$DEBUG and warn "Using pure library for JSON."
JSON.parser = Parser
JSON.generator = Generator
end
end

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module JSON
MAP = {
"\x0" => '\u0000',
"\x1" => '\u0001',
"\x2" => '\u0002',
"\x3" => '\u0003',
"\x4" => '\u0004',
"\x5" => '\u0005',
"\x6" => '\u0006',
"\x7" => '\u0007',
"\b" => '\b',
"\t" => '\t',
"\n" => '\n',
"\xb" => '\u000b',
"\f" => '\f',
"\r" => '\r',
"\xe" => '\u000e',
"\xf" => '\u000f',
"\x10" => '\u0010',
"\x11" => '\u0011',
"\x12" => '\u0012',
"\x13" => '\u0013',
"\x14" => '\u0014',
"\x15" => '\u0015',
"\x16" => '\u0016',
"\x17" => '\u0017',
"\x18" => '\u0018',
"\x19" => '\u0019',
"\x1a" => '\u001a',
"\x1b" => '\u001b',
"\x1c" => '\u001c',
"\x1d" => '\u001d',
"\x1e" => '\u001e',
"\x1f" => '\u001f',
'"' => '\"',
'\\' => '\\\\',
'/' => '\/',
} # :nodoc:
# Convert a UTF8 encoded Ruby string _string_ to a JSON string, encoded with
# UTF16 big endian characters as \u????, and return it.
def utf8_to_json(string) # :nodoc:
string = string.gsub(/["\\\/\x0-\x1f]/) { |c| MAP[c] }
string.gsub!(/(
(?:
[\xc2-\xdf][\x80-\xbf] |
[\xe0-\xef][\x80-\xbf]{2} |
[\xf0-\xf4][\x80-\xbf]{3}
)+ |
[\x80-\xc1\xf5-\xff] # invalid
)/nx) { |c|
c.size == 1 and raise GeneratorError, "invalid utf8 byte: '#{c}'"
s = JSON::UTF8toUTF16.iconv(c).unpack('H*')[0]
s.gsub!(/.{4}/n, '\\\\u\&')
}
string
rescue Iconv::Failure => e
raise GeneratorError, "Caught #{e.class}: #{e}"
end
module_function :utf8_to_json
module Pure
module Generator
# This class is used to create State instances, that are use to hold data
# while generating a JSON text from a a Ruby data structure.
class State
# Creates a State object from _opts_, which ought to be Hash to create
# a new State instance configured by _opts_, something else to create
# an unconfigured instance. If _opts_ is a State object, it is just
# returned.
def self.from_state(opts)
case opts
when self
opts
when Hash
new(opts)
else
new
end
end
# Instantiates a new State object, configured by _opts_.
#
# _opts_ can have the following keys:
#
# * *indent*: a string used to indent levels (default: ''),
# * *space*: a string that is put after, a : or , delimiter (default: ''),
# * *space_before*: a string that is put before a : pair delimiter (default: ''),
# * *object_nl*: a string that is put at the end of a JSON object (default: ''),
# * *array_nl*: a string that is put at the end of a JSON array (default: ''),
# * *check_circular*: true if checking for circular data structures
# should be done (the default), false otherwise.
# * *check_circular*: true if checking for circular data structures
# should be done, false (the default) otherwise.
# * *allow_nan*: true if NaN, Infinity, and -Infinity should be
# generated, otherwise an exception is thrown, if these values are
# encountered. This options defaults to false.
def initialize(opts = {})
@seen = {}
@indent = ''
@space = ''
@space_before = ''
@object_nl = ''
@array_nl = ''
@check_circular = true
@allow_nan = false
configure opts
end
# This string is used to indent levels in the JSON text.
attr_accessor :indent
# This string is used to insert a space between the tokens in a JSON
# string.
attr_accessor :space
# This string is used to insert a space before the ':' in JSON objects.
attr_accessor :space_before
# This string is put at the end of a line that holds a JSON object (or
# Hash).
attr_accessor :object_nl
# This string is put at the end of a line that holds a JSON array.
attr_accessor :array_nl
# This integer returns the maximum level of data structure nesting in
# the generated JSON, max_nesting = 0 if no maximum is checked.
attr_accessor :max_nesting
def check_max_nesting(depth) # :nodoc:
return if @max_nesting.zero?
current_nesting = depth + 1
current_nesting > @max_nesting and
raise NestingError, "nesting of #{current_nesting} is too deep"
end
# Returns true, if circular data structures should be checked,
# otherwise returns false.
def check_circular?
@check_circular
end
# Returns true if NaN, Infinity, and -Infinity should be considered as
# valid JSON and output.
def allow_nan?
@allow_nan
end
# Returns _true_, if _object_ was already seen during this generating
# run.
def seen?(object)
@seen.key?(object.__id__)
end
# Remember _object_, to find out if it was already encountered (if a
# cyclic data structure is if a cyclic data structure is rendered).
def remember(object)
@seen[object.__id__] = true
end
# Forget _object_ for this generating run.
def forget(object)
@seen.delete object.__id__
end
# Configure this State instance with the Hash _opts_, and return
# itself.
def configure(opts)
@indent = opts[:indent] if opts.key?(:indent)
@space = opts[:space] if opts.key?(:space)
@space_before = opts[:space_before] if opts.key?(:space_before)
@object_nl = opts[:object_nl] if opts.key?(:object_nl)
@array_nl = opts[:array_nl] if opts.key?(:array_nl)
@check_circular = !!opts[:check_circular] if opts.key?(:check_circular)
@allow_nan = !!opts[:allow_nan] if opts.key?(:allow_nan)
if !opts.key?(:max_nesting) # defaults to 19
@max_nesting = 19
elsif opts[:max_nesting]
@max_nesting = opts[:max_nesting]
else
@max_nesting = 0
end
self
end
# Returns the configuration instance variables as a hash, that can be
# passed to the configure method.
def to_h
result = {}
for iv in %w[indent space space_before object_nl array_nl check_circular allow_nan max_nesting]
result[iv.intern] = instance_variable_get("@#{iv}")
end
result
end
end
module GeneratorMethods
module Object
# Converts this object to a string (calling #to_s), converts
# it to a JSON string, and returns the result. This is a fallback, if no
# special method #to_json was defined for some object.
def to_json(*) to_s.to_json end
end
module Hash
# Returns a JSON string containing a JSON object, that is unparsed from
# this Hash instance.
# _state_ is a JSON::State object, that can also be used to configure the
# produced JSON string output further.
# _depth_ is used to find out nesting depth, to indent accordingly.
def to_json(state = nil, depth = 0, *)
if state
state = JSON.state.from_state(state)
state.check_max_nesting(depth)
json_check_circular(state) { json_transform(state, depth) }
else
json_transform(state, depth)
end
end
private
def json_check_circular(state)
if state and state.check_circular?
state.seen?(self) and raise JSON::CircularDatastructure,
"circular data structures not supported!"
state.remember self
end
yield
ensure
state and state.forget self
end
def json_shift(state, depth)
state and not state.object_nl.empty? or return ''
state.indent * depth
end
def json_transform(state, depth)
delim = ','
delim << state.object_nl if state
result = '{'
result << state.object_nl if state
result << map { |key,value|
s = json_shift(state, depth + 1)
s << key.to_s.to_json(state, depth + 1)
s << state.space_before if state
s << ':'
s << state.space if state
s << value.to_json(state, depth + 1)
}.join(delim)
result << state.object_nl if state
result << json_shift(state, depth)
result << '}'
result
end
end
module Array
# Returns a JSON string containing a JSON array, that is unparsed from
# this Array instance.
# _state_ is a JSON::State object, that can also be used to configure the
# produced JSON string output further.
# _depth_ is used to find out nesting depth, to indent accordingly.
def to_json(state = nil, depth = 0, *)
if state
state = JSON.state.from_state(state)
state.check_max_nesting(depth)
json_check_circular(state) { json_transform(state, depth) }
else
json_transform(state, depth)
end
end
private
def json_check_circular(state)
if state and state.check_circular?
state.seen?(self) and raise JSON::CircularDatastructure,
"circular data structures not supported!"
state.remember self
end
yield
ensure
state and state.forget self
end
def json_shift(state, depth)
state and not state.array_nl.empty? or return ''
state.indent * depth
end
def json_transform(state, depth)
delim = ','
delim << state.array_nl if state
result = '['
result << state.array_nl if state
result << map { |value|
json_shift(state, depth + 1) << value.to_json(state, depth + 1)
}.join(delim)
result << state.array_nl if state
result << json_shift(state, depth)
result << ']'
result
end
end
module Integer
# Returns a JSON string representation for this Integer number.
def to_json(*) to_s end
end
module Float
# Returns a JSON string representation for this Float number.
def to_json(state = nil, *)
case
when infinite?
if !state || state.allow_nan?
to_s
else
raise GeneratorError, "#{self} not allowed in JSON"
end
when nan?
if !state || state.allow_nan?
to_s
else
raise GeneratorError, "#{self} not allowed in JSON"
end
else
to_s
end
end
end
module String
# This string should be encoded with UTF-8 A call to this method
# returns a JSON string encoded with UTF16 big endian characters as
# \u????.
def to_json(*)
'"' << JSON.utf8_to_json(self) << '"'
end
# Module that holds the extinding methods if, the String module is
# included.
module Extend
# Raw Strings are JSON Objects (the raw bytes are stored in an array for the
# key "raw"). The Ruby String can be created by this module method.
def json_create(o)
o['raw'].pack('C*')
end
end
# Extends _modul_ with the String::Extend module.
def self.included(modul)
modul.extend Extend
end
# This method creates a raw object hash, that can be nested into
# other data structures and will be unparsed as a raw string. This
# method should be used, if you want to convert raw strings to JSON
# instead of UTF-8 strings, e. g. binary data.
def to_json_raw_object
{
JSON.create_id => self.class.name,
'raw' => self.unpack('C*'),
}
end
# This method creates a JSON text from the result of
# a call to to_json_raw_object of this String.
def to_json_raw(*args)
to_json_raw_object.to_json(*args)
end
end
module TrueClass
# Returns a JSON string for true: 'true'.
def to_json(*) 'true' end
end
module FalseClass
# Returns a JSON string for false: 'false'.
def to_json(*) 'false' end
end
module NilClass
# Returns a JSON string for nil: 'null'.
def to_json(*) 'null' end
end
end
end
end
end

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require 'strscan'
module JSON
module Pure
# This class implements the JSON parser that is used to parse a JSON string
# into a Ruby data structure.
class Parser < StringScanner
STRING = /" ((?:[^\x0-\x1f"\\] |
\\["\\\/bfnrt] |
\\u[0-9a-fA-F]{4} |
\\[\x20-\xff])*)
"/nx
INTEGER = /(-?0|-?[1-9]\d*)/
FLOAT = /(-?
(?:0|[1-9]\d*)
(?:
\.\d+(?i:e[+-]?\d+) |
\.\d+ |
(?i:e[+-]?\d+)
)
)/x
NAN = /NaN/
INFINITY = /Infinity/
MINUS_INFINITY = /-Infinity/
OBJECT_OPEN = /\{/
OBJECT_CLOSE = /\}/
ARRAY_OPEN = /\[/
ARRAY_CLOSE = /\]/
PAIR_DELIMITER = /:/
COLLECTION_DELIMITER = /,/
TRUE = /true/
FALSE = /false/
NULL = /null/
IGNORE = %r(
(?:
//[^\n\r]*[\n\r]| # line comments
/\* # c-style comments
(?:
[^*/]| # normal chars
/[^*]| # slashes that do not start a nested comment
\*[^/]| # asterisks that do not end this comment
/(?=\*/) # single slash before this comment's end
)*
\*/ # the End of this comment
|[ \t\r\n]+ # whitespaces: space, horicontal tab, lf, cr
)+
)mx
UNPARSED = Object.new
# Creates a new JSON::Pure::Parser instance for the string _source_.
#
# It will be configured by the _opts_ hash. _opts_ can have the following
# keys:
# * *max_nesting*: The maximum depth of nesting allowed in the parsed data
# structures. Disable depth checking with :max_nesting => false|nil|0,
# it defaults to 19.
# * *allow_nan*: If set to true, allow NaN, Infinity and -Infinity in
# defiance of RFC 4627 to be parsed by the Parser. This option defaults
# to false.
# * *create_additions*: If set to false, the Parser doesn't create
# additions even if a matchin class and create_id was found. This option
# defaults to true.
def initialize(source, opts = {})
super
if !opts.key?(:max_nesting) # defaults to 19
@max_nesting = 19
elsif opts[:max_nesting]
@max_nesting = opts[:max_nesting]
else
@max_nesting = 0
end
@allow_nan = !!opts[:allow_nan]
ca = true
ca = opts[:create_additions] if opts.key?(:create_additions)
@create_id = ca ? JSON.create_id : nil
end
alias source string
# Parses the current JSON string _source_ and returns the complete data
# structure as a result.
def parse
reset
obj = nil
until eos?
case
when scan(OBJECT_OPEN)
obj and raise ParserError, "source '#{peek(20)}' not in JSON!"
@current_nesting = 1
obj = parse_object
when scan(ARRAY_OPEN)
obj and raise ParserError, "source '#{peek(20)}' not in JSON!"
@current_nesting = 1
obj = parse_array
when skip(IGNORE)
;
else
raise ParserError, "source '#{peek(20)}' not in JSON!"
end
end
obj or raise ParserError, "source did not contain any JSON!"
obj
end
private
# Unescape characters in strings.
UNESCAPE_MAP = Hash.new { |h, k| h[k] = k.chr }
UNESCAPE_MAP.update({
?" => '"',
?\\ => '\\',
?/ => '/',
?b => "\b",
?f => "\f",
?n => "\n",
?r => "\r",
?t => "\t",
?u => nil,
})
def parse_string
if scan(STRING)
return '' if self[1].empty?
self[1].gsub(%r((?:\\[\\bfnrt"/]|(?:\\u(?:[A-Fa-f\d]{4}))+|\\[\x20-\xff]))n) do |c|
if u = UNESCAPE_MAP[c[1]]
u
else # \uXXXX
bytes = ''
i = 0
while c[6 * i] == ?\\ && c[6 * i + 1] == ?u
bytes << c[6 * i + 2, 2].to_i(16) << c[6 * i + 4, 2].to_i(16)
i += 1
end
JSON::UTF16toUTF8.iconv(bytes)
end
end
else
UNPARSED
end
rescue Iconv::Failure => e
raise GeneratorError, "Caught #{e.class}: #{e}"
end
def parse_value
case
when scan(FLOAT)
Float(self[1])
when scan(INTEGER)
Integer(self[1])
when scan(TRUE)
true
when scan(FALSE)
false
when scan(NULL)
nil
when (string = parse_string) != UNPARSED
string
when scan(ARRAY_OPEN)
@current_nesting += 1
ary = parse_array
@current_nesting -= 1
ary
when scan(OBJECT_OPEN)
@current_nesting += 1
obj = parse_object
@current_nesting -= 1
obj
when @allow_nan && scan(NAN)
NaN
when @allow_nan && scan(INFINITY)
Infinity
when @allow_nan && scan(MINUS_INFINITY)
MinusInfinity
else
UNPARSED
end
end
def parse_array
raise NestingError, "nesting of #@current_nesting is to deep" if
@max_nesting.nonzero? && @current_nesting > @max_nesting
result = []
delim = false
until eos?
case
when (value = parse_value) != UNPARSED
delim = false
result << value
skip(IGNORE)
if scan(COLLECTION_DELIMITER)
delim = true
elsif match?(ARRAY_CLOSE)
;
else
raise ParserError, "expected ',' or ']' in array at '#{peek(20)}'!"
end
when scan(ARRAY_CLOSE)
if delim
raise ParserError, "expected next element in array at '#{peek(20)}'!"
end
break
when skip(IGNORE)
;
else
raise ParserError, "unexpected token in array at '#{peek(20)}'!"
end
end
result
end
def parse_object
raise NestingError, "nesting of #@current_nesting is to deep" if
@max_nesting.nonzero? && @current_nesting > @max_nesting
result = {}
delim = false
until eos?
case
when (string = parse_string) != UNPARSED
skip(IGNORE)
unless scan(PAIR_DELIMITER)
raise ParserError, "expected ':' in object at '#{peek(20)}'!"
end
skip(IGNORE)
unless (value = parse_value).equal? UNPARSED
result[string] = value
delim = false
skip(IGNORE)
if scan(COLLECTION_DELIMITER)
delim = true
elsif match?(OBJECT_CLOSE)
;
else
raise ParserError, "expected ',' or '}' in object at '#{peek(20)}'!"
end
else
raise ParserError, "expected value in object at '#{peek(20)}'!"
end
when scan(OBJECT_CLOSE)
if delim
raise ParserError, "expected next name, value pair in object at '#{peek(20)}'!"
end
if @create_id and klassname = result[@create_id]
klass = JSON.deep_const_get klassname
break unless klass and klass.json_creatable?
result = klass.json_create(result)
end
break
when skip(IGNORE)
;
else
raise ParserError, "unexpected token in object at '#{peek(20)}'!"
end
end
result
end
end
end
end

9
ext/json/lib/json/version.rb Normal file
View file

@ -0,0 +1,9 @@
module JSON
# JSON version
VERSION = '1.1.2'
VERSION_ARRAY = VERSION.split(/\./).map { |x| x.to_i } # :nodoc:
VERSION_MAJOR = VERSION_ARRAY[0] # :nodoc:
VERSION_MINOR = VERSION_ARRAY[1] # :nodoc:
VERSION_BUILD = VERSION_ARRAY[2] # :nodoc:
VARIANT_BINARY = false
end