rest api ajax / jquery with HTTP header

node.js에서 작성하는거 처럼 인자랑 넣어주면 되는거 였군...

[링크 : https://stackoverflow.com/questions/25085012/how-to-call-rest-api-with-jquery-with-additional-headers]

[링크 : https://spring.io/guides/gs/consuming-rest-jquery/]