vendor/rails/activesupport/lib/active_support/json/encoders/string.rb

   1 module ActiveSupport
   2   module JSON
   3     module Encoding
   4       mattr_accessor :escape_regex
   5
   6       ESCAPED_CHARS = {
   7         "\010" =>  '\b',
   8         "\f"   =>  '\f',
   9         "\n"   =>  '\n',
  10         "\r"   =>  '\r',
  11         "\t"   =>  '\t',
  12         '"'    =>  '\"',
  13         '\\'   =>  '\\\\',
  14         '>'    =>  '\u003E',
  15         '<'    =>  '\u003C',
  16         '&'    =>  '\u0026'
  17       }
  18     end
  19   end
  20 end
  21
  22 ActiveSupport.escape_html_entities_in_json = true
  23
  24 class String
  25   def to_json(options = nil) #:nodoc:
  26     json = '"' + gsub(ActiveSupport::JSON::Encoding.escape_regex) { |s|
  27       ActiveSupport::JSON::Encoding::ESCAPED_CHARS[s]
  28     }
  29     json.force_encoding('ascii-8bit') if respond_to?(:force_encoding)
  30     json.gsub(/([\xC0-\xDF][\x80-\xBF]|
  31              [\xE0-\xEF][\x80-\xBF]{2}|
  32              [\xF0-\xF7][\x80-\xBF]{3})+/nx) { |s|
  33       s.unpack("U*").pack("n*").unpack("H*")[0].gsub(/.{4}/, '\\\\u\&')
  34     } + '"'
  35   end
  36 end