class Excon::Response

def self.parse_headers(socket, datum)
  last_key = nil
  until (data = socket.readline.chomp).empty?
    if !data.lstrip!.nil?
      raise Excon::Error::ResponseParse, 'malformed header' unless last_key
      # append to last_key's last value
      datum[:response][:headers][last_key] << ' ' << data.rstrip
    else
      key, value = data.split(':', 2)
      raise Excon::Error::ResponseParse, 'malformed header' unless value
      # add key/value or append value to existing values
      datum[:response][:headers][key] = ([datum[:response][:headers][key]] << value.strip).compact.join(', ')
      if key.casecmp?('Set-Cookie')
        datum[:response][:cookies] << value.strip
      end
      last_key = key
    end
  end
end