What is the best way to add some API-ish behaviour to a standard Rails application ? I mean, is it possible to add some new actions to a controller or modify the existing ones so that they return JSON (without specifying JSON extension in the URL (like http://myhost.com/books and not http://myhost.com/books.json and be able to return either HTML or JSON in the same time? Thank you.
➜ rails_app git:(master) ✗ http :3000/books
HTTP/1.1 200 OK
Cache-Control: max-age=0, private, must-revalidate
Content-Type: application/json; charset=utf-8
ETag: W/"966ef6fc32020fa85b7250fa20f25208"
Transfer-Encoding: chunked
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN
X-Request-Id: 893c63ac-b9e3-40ee-b8f5-7b9938916ca5
X-Runtime: 0.359281
X-XSS-Protection: 1; mode=block
[
{
"created_at": "2017-12-10T16:06:29.896Z",
"id": 1,
"isbn": "12345",
"title": "Java",
"updated_at": "2017-12-10T16:06:29.896Z"
}
]