Encode request into client_message

def encode_request(name, items):
    """ Encode request into client_message"""
    client_message = ClientMessage(payload_size=calculate_size(name, items))
    client_message.set_message_type(REQUEST_TYPE)
    client_message.set_retryable(RETRYABLE)
    client_message.append_str(name)
    client_message.append_int(len(items))
    for items_item in items:
        client_message.append_data(items_item)
    client_message.update_frame_length()
    return client_message