class Faraday::Utils::Headers

def parse(header_string)
  return unless header_string && !header_string.empty?
  headers = header_string.split("\r\n")
  # Find the last set of response headers.
  start_index = headers.rindex { |x| x.start_with?('HTTP/') } || 0
  last_response = headers.slice(start_index, headers.size)
  last_response
    .tap { |a| a.shift if a.first.start_with?('HTTP/') }
    .map { |h| h.split(/:\s*/, 2) } # split key and value
    .reject { |p| p[0].nil? } # ignore blank lines
    .each { |key, value| add_parsed(key, value) }
end