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if RUBY_VERSION >= '1.9'
require 'uri'
str = "\xE6\x97\xA5\xE6\x9C\xAC\xE8\xAA\x9E" # Ni-ho-nn-go in UTF-8, means Japanese.
str.force_encoding(Encoding::UTF_8) if str.respond_to?(:force_encoding)
parser = URI::Parser.new
unless str == parser.unescape(parser.escape(str))
URI::Parser.class_eval do
remove_method :unescape
def unescape(str, escaped = @regexp[:ESCAPED])
enc = (str.encoding == Encoding::US_ASCII) ? Encoding::UTF_8 : str.encoding
str.gsub(escaped) { [$&[1, 2].hex].pack('C') }.force_encoding(enc)
end
end
end
end
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