Function sni_callback

examples/example_config.py:236–240

(socket, server_hostname, context)

    # Server can also return different server certificate depending which
    # hostname the client uses. Requires Python 3.7 or later.
    def sni_callback(socket, server_hostname, context):
        if server_hostname == "foo.127.0.0.1.nip.io":
            new_context = default_ssl_context_factory()
            new_context.load_cert_chain(certfile="foo.pem", keyfile="foo-key.pem")
            socket.context = new_context

    context.sni_callback = sni_callback