Server Sent Events

[mtiller]

I was looking for a way for huma resources to implement Server Sent Events. In that example, they see if the response writer conforms to the Flusher interface. If it does, there is no problem. But I've tried that with huma.Context and it does not conform to the Flusher interface. As a result, it isn't possible to flush the events as they are generated.

Any suggestions here?

[mtiller]

A related question would be how to integrate websockets, should the need arise?

[danielgtaylor]

@mtiller this is something I've been meaning to look into as we may start using SSE in the next few months as well. I don't know whether it is currently possible (it seems like it's not) so maybe we need to add Flusher to the huma.Context interface as a first step.

[mt35-rs]

What I don't quite get is why the ResponseWriter doesn't already implement the Flusher interface. I'm pretty sure I read that http.ResponseWriter does but it is possible that it could be wrapped by something that doesn't. But I didn't see any case where huma was wrapping it. Just ensuring that the ResponseWriter that is used to compose huma.Context supports Flusher would be sufficient presumably. I wonder if simply nesting the ResponseWriter is somehow interfering with the ability to cast it to Flusher?

[mt35-rs]

I've added a pull request (#89) that resolves this. If you could merge this, my tests indicate that SSE should work at that point.

[danielgtaylor]

Closing as this was resolved in #89 for Huma v1, and Huma v2 has an sse package to enable this functionality at a higher level.