How to set the Accept header globally in OpenAPI 3.0? - openapi

Question

I have a new OpenAPI setup via SwaggerHub. Is there an option to force a certain Accept header globally?
I have set up the Content-Type on the response:
openapi: 3.0.0
paths:
/test-path:
get:
responses:
'200':
description: OK
content:
application/vnd.company.v1.0.0+json:
When inserting a different Accept header via cURL request, the following out is made:
{"message":"Missing matching response for specified Accept header"}
That makes sense, since we aren't providing any response for that.

Answer 1

Unlike OpenAPI/Swagger 2.0, which has global consumes and produces, OpenAPI 3.0 requires that request and response media types be defined in each operation individually. There's no way to define the Content-Type or requests or responses globally.
You can, however, $ref common response definitions (such as error responses), which can reduce the repetition.
openapi: 3.0.2
...
paths:
/foo:
get:
responses:
'400':
$ref: '#/components/responses/ErrorResponse'
/bar:
get:
responses:
'400':
$ref: '#/components/responses/ErrorResponse'
components:
responses:
ErrorResponse:
description: An error occurred
content:
application/vnd.error+json:
schema:
...