class ActionDispatch::Journey::Router::Utils::UriEncoder

def escape(component, pattern)
  component.gsub(pattern) { |unsafe| percent_encode(unsafe) }.force_encoding(US_ASCII)
end

def escape_fragment(fragment)
  escape(fragment, FRAGMENT)
end

def escape_path(path)
  escape(path, PATH)
end

def escape_segment(segment)
  escape(segment, SEGMENT)
end

def percent_encode(unsafe)
  safe = EMPTY.dup
  unsafe.each_byte { |b| safe << DEC2HEX[b] }
  safe
end

def unescape_uri(uri)
  encoding = uri.encoding == US_ASCII ? UTF_8 : uri.encoding
  uri.gsub(ESCAPED) { |match| [match[1, 2].hex].pack("C") }.force_encoding(encoding)
end