def read_response_headers(response)
      raw_headers = response.headers
      headers = {}
      EXCLUDE_RESPONSE_HEADER_PATTERNS.each do |pattern|
        raw_headers = raw_headers.reject { |h| h if h.starts_with? pattern }
      end
      raw_headers.each do |key, val|
        headers.merge!(cleanup_header(key) => val)
      end
      headers
    end
def read_response_headers(response)
      raw_headers = response.headers
      headers = {}
      EXCLUDE_RESPONSE_HEADER_PATTERNS.each do |pattern|
        raw_headers = raw_headers.reject { |h| h if h.starts_with? pattern }
      end
      raw_headers.each do |key, val|
        headers.merge!(cleanup_header(key) => val)
      end
      headers
    end
read and cleanup response headers
 returns Hash