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author | Sam Stephenson <sam@37signals.com> | 2007-03-18 07:05:58 +0000 |
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committer | Sam Stephenson <sam@37signals.com> | 2007-03-18 07:05:58 +0000 |
commit | 3202fbabe6df3591d7e2c35727ea9c8b68df8828 (patch) | |
tree | c55f19f82564280e074d9aca449ee4848a97f158 /activesupport/lib/active_support/json/encoding.rb | |
parent | 3d5c947155934fb498f8788a204ae9f2e03f2f42 (diff) | |
download | rails-3202fbabe6df3591d7e2c35727ea9c8b68df8828.tar.gz rails-3202fbabe6df3591d7e2c35727ea9c8b68df8828.tar.bz2 rails-3202fbabe6df3591d7e2c35727ea9c8b68df8828.zip |
Refactor ActiveSupport::JSON to be less obtuse. Add support for JSON decoding by way of Syck with ActiveSupport::JSON.decode(json_string). Prevent hash keys that are JavaScript reserved words from being unquoted during encoding.
git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6443 5ecf4fe2-1ee6-0310-87b1-e25e094e27de
Diffstat (limited to 'activesupport/lib/active_support/json/encoding.rb')
-rw-r--r-- | activesupport/lib/active_support/json/encoding.rb | 45 |
1 files changed, 45 insertions, 0 deletions
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 |