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module ActiveSupport
module JSON
module Encoding
ESCAPED_CHARS = {
"\010" => '\b',
"\f" => '\f',
"\n" => '\n',
"\r" => '\r',
"\t" => '\t',
'"' => '\"',
'\\' => '\\\\',
">" => '\076',
'<' => '\074'
}
end
end
end
class String
def to_json(options = nil) #: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
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