def read_request_headers(request)
      headers = {}
      request.env.keys.each do |key|
        if EXCLUDE_REQUEST_HEADER_PATTERNS.all? { |p| !key.starts_with? p }
          headers.merge!(cleanup_header(key) => request.env[key])
        end
      end
      headers
    end
def read_request_headers(request)
      headers = {}
      request.env.keys.each do |key|
        if EXCLUDE_REQUEST_HEADER_PATTERNS.all? { |p| !key.starts_with? p }
          headers.merge!(cleanup_header(key) => request.env[key])
        end
      end
      headers
    end
read and cleanup request headers
 returns Hash