No way to respond() with headers

[antskelton42]

Proposed change

Unless I've missed it I don't see anyway for a service's endpoint to respond() whilst supplying headers (other than in the Error case, that is).

Use case

Add a respond_with_headers() method following the pattern set by request_with_headers() and publish_with_headers().

Contribution

No response

[Jarema]

It was a design decision.

We're discussing some way to handle headers, but we need to be careful when having any data beyond payload in service API, mostly because of future schema validations possibilities.

We're discusisng ability to have metadata abstraction that would use headers under the hood and clearly inform users that it will not be part of any validations.