How do add custom response headers for AWS Lambda Integration

[vladaman]

We are using API Gateway (HTTP) + AWS Lambda and we need to return extra header for CORS: Access-Control-Allow-Origin

How can we intercept all responses and add custom header to every response?

I tried following but does not seem to have an effect:

public class ResponseFilters implements ClientResponseFilter {
    @Override
    public void filter(ClientRequestContext clientRequestContext, ClientResponseContext clientResponseContext) throws IOException {
        clientResponseContext.getHeaders().add("Dummy", "me");
    }
}

[quarkus-bot[bot]]

/cc @matejvasek, @patriot1burke