RESTEasy Reactive - support binary content streaming with header control

[huw0]

Description

Summary - Quarkus RESTEasy Reactive should natively support Uni<RestResponse<Multi<byte[]>>>

Description

I am using the solution outlined here for streaming binary content using Multi<byte[]>.

It is essential that the response and headers can be set dynamically. For example Content-Type and ETag. The latter allows dynamically sending 304 Not Modified on any later duplicate requests.

There has been discussion about this on Zulip.

Implementation ideas

No response

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[quarkus-bot]

/cc @FroMage, @geoand, @stuartwdouglas

[geoand]

Thanks for reporting.

I would say that supporting Uni<RestResponse<Multi<byte[]>>> is not ideal as that type is very complicated and not very intuitive...

[FroMage]

Well, the type is far from ideal, for sure. But I can think of cases where this is required, for example if the header data comes from the DB (size, file name) and the content is then streamed from FS or online storage or whatever. So unfortunately it makes a lot of sense :(

[geoand]

#33197 introduces RestMulti which can be used to control the response headers and status code