This plug provides content type negotiation by validating the content-type and accept headers.

The proper jsonapi.org content type is: application/vnd.api+json.

As per the spec this plug does three things.

1. Returns 415 unless the content-type header is correct.
2. Returns 406 unless the accept header is correct.
3. Registers a before send hook to set the content-type if not already set.

Usage

Just include in your plug stack:

plug JaSerializer.ContentTypeNegotiation