diff options
Diffstat (limited to 'activesupport/lib/active_support/json')
15 files changed, 179 insertions, 93 deletions
diff --git a/activesupport/lib/active_support/json/decoding.rb b/activesupport/lib/active_support/json/decoding.rb new file mode 100644 index 0000000000..60003a94e5 --- /dev/null +++ b/activesupport/lib/active_support/json/decoding.rb @@ -0,0 +1,40 @@ +require 'yaml' +require 'strscan' + +module ActiveSupport + module JSON + class ParseError < StandardError + end + + class << self + # Converts a JSON string into a Ruby object. + def decode(json) + YAML.load(convert_json_to_yaml(json)) + rescue ArgumentError => e + raise ParseError, "Invalid JSON string" + end + + protected + # Ensure that ":" and "," are always followed by a space + def convert_json_to_yaml(json) #:nodoc: + scanner, quoting, marks = StringScanner.new(json), false, [] + + while scanner.scan_until(/(['":,]|\\.)/) + case char = scanner[1] + when '"', "'" + quoting = quoting == char ? false : char + when ":", "," + marks << scanner.pos - 1 unless quoting + end + end + + if marks.empty? + json + else + ranges = ([0] + marks.map(&:succ)).zip(marks + [json.length]) + ranges.map { |(left, right)| json[left..right] }.join(" ") + end + end + end + end +end diff --git a/activesupport/lib/active_support/json/encoders.rb b/activesupport/lib/active_support/json/encoders.rb deleted file mode 100644 index c3e3619f59..0000000000 --- a/activesupport/lib/active_support/json/encoders.rb +++ /dev/null @@ -1,25 +0,0 @@ -module ActiveSupport - module JSON #:nodoc: - module Encoders - mattr_accessor :encoders - @@encoders = {} - - class << self - def define_encoder(klass, &block) - encoders[klass] = block - end - - def [](klass) - klass.ancestors.each do |k| - encoder = encoders[k] - return encoder if encoder - end - end - end - end - end -end - -Dir[File.dirname(__FILE__) + '/encoders/*.rb'].each do |file| - require file[0..-4] -end diff --git a/activesupport/lib/active_support/json/encoders/core.rb b/activesupport/lib/active_support/json/encoders/core.rb deleted file mode 100644 index f6cdfbcde5..0000000000 --- a/activesupport/lib/active_support/json/encoders/core.rb +++ /dev/null @@ -1,68 +0,0 @@ -module ActiveSupport - module JSON #:nodoc: - module Encoders #:nodoc: - define_encoder Object do |object| - object.instance_values.to_json - end - - define_encoder TrueClass do - 'true' - end - - define_encoder FalseClass do - 'false' - end - - define_encoder NilClass do - 'null' - end - - ESCAPED_CHARS = { - "\010" => '\b', - "\f" => '\f', - "\n" => '\n', - "\r" => '\r', - "\t" => '\t', - '"' => '\"', - '\\' => '\\\\' - } - - define_encoder String do |string| - '"' + string.gsub(/[\010\f\n\r\t"\\]/) { |s| - ESCAPED_CHARS[s] - }.gsub(/([\xC0-\xDF][\x80-\xBF]| - [\xE0-\xEF][\x80-\xBF]{2}| - [\xF0-\xF7][\x80-\xBF]{3})+/nx) { |s| - s.unpack("U*").pack("n*").unpack("H*")[0].gsub(/.{4}/, '\\\\u\&') - } + '"' - end - - define_encoder Numeric do |numeric| - numeric.to_s - end - - define_encoder Symbol do |symbol| - symbol.to_s.to_json - end - - define_encoder Enumerable do |enumerable| - "[#{enumerable.map { |value| value.to_json } * ', '}]" - end - - define_encoder Hash do |hash| - returning result = '{' do - result << hash.map do |key, value| - key = ActiveSupport::JSON::Variable.new(key.to_s) if - ActiveSupport::JSON.can_unquote_identifier?(key) - "#{key.to_json}: #{value.to_json}" - end * ', ' - result << '}' - end - end - - define_encoder Regexp do |regexp| - regexp.inspect - end - end - end -end diff --git a/activesupport/lib/active_support/json/encoders/enumerable.rb b/activesupport/lib/active_support/json/encoders/enumerable.rb new file mode 100644 index 0000000000..150d233939 --- /dev/null +++ b/activesupport/lib/active_support/json/encoders/enumerable.rb @@ -0,0 +1,5 @@ +module Enumerable + def to_json #:nodoc: + "[#{map { |value| ActiveSupport::JSON.encode(value) } * ', '}]" + end +end diff --git a/activesupport/lib/active_support/json/encoders/false_class.rb b/activesupport/lib/active_support/json/encoders/false_class.rb new file mode 100644 index 0000000000..78524e2a03 --- /dev/null +++ b/activesupport/lib/active_support/json/encoders/false_class.rb @@ -0,0 +1,5 @@ +class FalseClass + def to_json #:nodoc: + 'false' + end +end diff --git a/activesupport/lib/active_support/json/encoders/hash.rb b/activesupport/lib/active_support/json/encoders/hash.rb new file mode 100644 index 0000000000..3654e10b2e --- /dev/null +++ b/activesupport/lib/active_support/json/encoders/hash.rb @@ -0,0 +1,12 @@ +class Hash + def to_json #:nodoc: + returning result = '{' do + result << map do |key, value| + key = ActiveSupport::JSON::Variable.new(key.to_s) if + ActiveSupport::JSON.can_unquote_identifier?(key) + "#{ActiveSupport::JSON.encode(key)}: #{ActiveSupport::JSON.encode(value)}" + end * ', ' + result << '}' + end + end +end diff --git a/activesupport/lib/active_support/json/encoders/nil_class.rb b/activesupport/lib/active_support/json/encoders/nil_class.rb new file mode 100644 index 0000000000..98bb6fb677 --- /dev/null +++ b/activesupport/lib/active_support/json/encoders/nil_class.rb @@ -0,0 +1,5 @@ +class NilClass + def to_json #:nodoc: + 'null' + end +end diff --git a/activesupport/lib/active_support/json/encoders/numeric.rb b/activesupport/lib/active_support/json/encoders/numeric.rb new file mode 100644 index 0000000000..5d9b2eea9e --- /dev/null +++ b/activesupport/lib/active_support/json/encoders/numeric.rb @@ -0,0 +1,5 @@ +class Numeric + def to_json #:nodoc: + to_s + end +end diff --git a/activesupport/lib/active_support/json/encoders/object.rb b/activesupport/lib/active_support/json/encoders/object.rb new file mode 100644 index 0000000000..51852e17cb --- /dev/null +++ b/activesupport/lib/active_support/json/encoders/object.rb @@ -0,0 +1,10 @@ +class Object + # Dumps object in JSON (JavaScript Object Notation). See www.json.org for more info. + # + # Account.find(1).to_json + # => "{attributes: {username: \"foo\", id: \"1\", password: \"bar\"}}" + # + def to_json + ActiveSupport::JSON.encode(instance_values) + end +end diff --git a/activesupport/lib/active_support/json/encoders/regexp.rb b/activesupport/lib/active_support/json/encoders/regexp.rb new file mode 100644 index 0000000000..a3f32eafa2 --- /dev/null +++ b/activesupport/lib/active_support/json/encoders/regexp.rb @@ -0,0 +1,5 @@ +class Regexp + def to_json #:nodoc: + inspect + end +end diff --git a/activesupport/lib/active_support/json/encoders/string.rb b/activesupport/lib/active_support/json/encoders/string.rb new file mode 100644 index 0000000000..707298d987 --- /dev/null +++ b/activesupport/lib/active_support/json/encoders/string.rb @@ -0,0 +1,27 @@ +module ActiveSupport + module JSON + module Encoding + ESCAPED_CHARS = { + "\010" => '\b', + "\f" => '\f', + "\n" => '\n', + "\r" => '\r', + "\t" => '\t', + '"' => '\"', + '\\' => '\\\\' + } + end + end +end + +class String + def to_json #:nodoc: + '"' + gsub(/[\010\f\n\r\t"\\]/) { |s| + ActiveSupport::JSON::Encoding::ESCAPED_CHARS[s] + }.gsub(/([\xC0-\xDF][\x80-\xBF]| + [\xE0-\xEF][\x80-\xBF]{2}| + [\xF0-\xF7][\x80-\xBF]{3})+/nx) { |s| + s.unpack("U*").pack("n*").unpack("H*")[0].gsub(/.{4}/, '\\\\u\&') + } + '"' + end +end diff --git a/activesupport/lib/active_support/json/encoders/symbol.rb b/activesupport/lib/active_support/json/encoders/symbol.rb new file mode 100644 index 0000000000..57291e5448 --- /dev/null +++ b/activesupport/lib/active_support/json/encoders/symbol.rb @@ -0,0 +1,5 @@ +class Symbol + def to_json #:nodoc: + ActiveSupport::JSON.encode(to_s) + end +end diff --git a/activesupport/lib/active_support/json/encoders/true_class.rb b/activesupport/lib/active_support/json/encoders/true_class.rb new file mode 100644 index 0000000000..f652f8bb54 --- /dev/null +++ b/activesupport/lib/active_support/json/encoders/true_class.rb @@ -0,0 +1,5 @@ +class TrueClass + def to_json #:nodoc: + 'true' + end +end diff --git a/activesupport/lib/active_support/json/encoding.rb b/activesupport/lib/active_support/json/encoding.rb new file mode 100644 index 0000000000..babb65a924 --- /dev/null +++ b/activesupport/lib/active_support/json/encoding.rb @@ -0,0 +1,45 @@ +require 'active_support/json/variable' + +require 'active_support/json/encoders/object' # Require this file explicitly for rdoc +Dir[File.dirname(__FILE__) + '/encoders/**/*.rb'].each { |file| require file[0..-4] } + +module ActiveSupport + module JSON + # When +true+, Hash#to_json will omit quoting string or symbol keys + # if the keys are valid JavaScript identifiers. Note that this is + # technically improper JSON (all object keys must be quoted), so if + # you need strict JSON compliance, set this option to +false+. + mattr_accessor :unquote_hash_key_identifiers + @@unquote_hash_key_identifiers = true + + class CircularReferenceError < StandardError + end + + class << self + REFERENCE_STACK_VARIABLE = :json_reference_stack #:nodoc: + + # Converts a Ruby object into a JSON string. + def encode(value) + raise_on_circular_reference(value) do + value.send(:to_json) + end + end + + def can_unquote_identifier?(key) #:nodoc: + unquote_hash_key_identifiers && + ActiveSupport::JSON.valid_identifier?(key) + end + + protected + def raise_on_circular_reference(value) #:nodoc: + stack = Thread.current[REFERENCE_STACK_VARIABLE] ||= [] + raise CircularReferenceError, 'object references itself' if + stack.include? value + stack << value + yield + ensure + stack.pop + end + end + end +end diff --git a/activesupport/lib/active_support/json/variable.rb b/activesupport/lib/active_support/json/variable.rb new file mode 100644 index 0000000000..325ac9b7a6 --- /dev/null +++ b/activesupport/lib/active_support/json/variable.rb @@ -0,0 +1,10 @@ +module ActiveSupport + module JSON + # A string that returns itself as as its JSON-encoded form. + class Variable < String + def to_json + self + end + end + end +end |