diff options
Diffstat (limited to 'activesupport/lib/active_support/json/decoding.rb')
-rw-r--r-- | activesupport/lib/active_support/json/decoding.rb | 40 |
1 files changed, 40 insertions, 0 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 |