使用curl向elasticsearch批量插入数据的时候报错：The bulk request must be terminated by a newline [\\n]

{"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"The bulk request must be terminated by a newline [\n]"}],"type":"illegal_argument_exception","reason":"The bulk request must be terminated by a newline [\n]"},"status":400}