Grails - content-type dependent afterInterceptor

Question

Can I set a controller afterInterceptor based on content-type?

Example: only call afterInterceptor if the incoming request type is application/json; otherwise do not call afterInterceptor

I'm not finding a way and the "withFormat" closure approach is going to be cumbersome to set on every action.

I want to convert the model to json only if the incoming request type is json.

Or, are there other ways to achieve my goal?

Thanks in advance, Todd

Answer 1

You can add a guard clause to your afterInterceptor that exits if the request content-type is not JSON.

def afterInterceptor = { model ->
    if (request.getHeader('Content-Type')?.startsWith('application/json')) {
        return
    }
    //do your json stuff here
}

Or, if you are really interested in the incoming Accept header, then you would use

if (request.format != 'JSON') return