Swagger POST with non-json body - api

Question

I'm defining a resource that you POST to with a non-JSON body. It's just a string like form parameters. Something like what happens with OAuth:
grant_type=&code=&redirect_uri=
How can I document that on Swagger? Do I have to use formParam format instead of body? Everything I put into body it converts to JSON examples.
TokenRequest:
properties:
grant_type:
type: string
description: OAuth Grant Type
enum:
- authorization_code
- refresh
code:
type: string
description: Authorization Code obtained from /authorize required if grant_type = au
redirect_uri:
type: string
description: Defined Redirect URI Example - https://example.com/callback
refresh_token:
type: string
description: Required if grant_type = refresh

Answer 1

Here is an example on how to document the form data:
post:
tags:
- pet
summary: Updates a pet in the store with form data
description: ''
operationId: updatePetWithForm
consumes:
- application/x-www-form-urlencoded
produces:
- application/xml
- application/json
parameters:
- name: petId
in: path
description: ID of pet that needs to be updated
required: true
type: integer
format: int64
- name: name
in: formData
description: Updated name of the pet
required: false
type: string
- name: status
in: formData
description: Updated status of the pet
required: false
type: string
responses:
'405':
description: Invalid input
security:
- petstore_auth:
- 'write:pets'
- 'read:pets'
But in your case, it seems you want to define OAuth setting so please refer to Swagger Spec 2.0 for more information. Here is an example for PetStore:
securityDefinitions:
petstore_auth:
type: oauth2
authorizationUrl: 'http://petstore.swagger.io/api/oauth/dialog'
flow: implicit
scopes:
'write:pets': modify pets in your account
'read:pets': read your pets
api_key:
type: apiKey
name: api_key
in: header