def place_order():
	code = request.json['code']
	quantity = request.json['quantity']
	price = request.json['price']
	side = request.json['side']
	ltype = request.json['type']
	cc = check_parameters(request.json)
	message = cc.place_order(code, quantity, price, side, ltype)
	logtext = log_handler(message, '下单')
	no_db_logger.info(logtext)
	return json.dumps(message, ensure_ascii=False)