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Monkey patch ActiveSupport to bring back to_json unicode character encoding. There is a better way if you have control over the to_json call, use JSON.generate(object, :ascii_only => true). Read more @ http://omegadelta.net/2013/04/28/changes-to-how-rails-3-2-13-and-4-0-encodes-unicode-in-json/
module ActiveSupport
module JSON
module Encoding
class << self
# from https://github.com/rails/rails/blob/v3.2.12/activesupport/lib/active_support/json/encoding.rb#L121
def escape(string)
if string.respond_to?(:force_encoding)
string = string.encode(::Encoding::UTF_8, :undef => :replace).force_encoding(::Encoding::BINARY)
end
json = string.
gsub(escape_regex) { |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}/n, '\\\\u\&')
}
## alternate encoding from https://github.com/rails/rails/issues/3727
#json = string.
# gsub(escape_regex) { |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}/n, '\\\\u\&')
#}
json = %("#{json}")
json.force_encoding(::Encoding::UTF_8) if json.respond_to?(:force_encoding)
json
end
end
end
end
end
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