def _has_dns_message_content_type(flow):
    """
    Check if HTTP request has a DNS-looking 'Content-Type' header

    :param flow: mitmproxy flow
    :return: True if 'Content-Type' header is DNS-looking, False otherwise
    """
    doh_content_types = ['application/dns-message']
    if 'Content-Type' in flow.request.headers:
        if flow.request.headers['Content-Type'] in doh_content_types:
            return True
    return False