1`Accept Header` can be used to ask the server to return
2different type of response format
3
4For example :
5
6`/api/xname` endpoint , support both xml and json
7as response type so we can add accept header
8`application/xml` to get xml result and `application/json` result.
9
10If server does not support such type ,
11it will return `406 not acceptable` status code.