Passing parameters in BODY with GET request

Question

I want to pass some data within request body, but I'm using GET request, because I just want to modify this data and send it back.

I know that it is bad practice to use body with GET requests.

But what should I do with this situation if I want to build correct RESTful service?

P.S. I'm not changin any object on server. I'm not putting any new object on server.

Answer 1

You want a POST. Something like

POST /hashes
{
    "myInput": ...
}

The response would be the hashed value. There's no rule that the created resource must be retained by the server.

From the RFC:

The action performed by the POST method might not result in a
resource that can be identified by a URI. In this case, either 200
(OK) or 204 (No Content) is the appropriate response status,
depending on whether or not the response includes an entity that
describes the result.