Integrate Server-Sent Events in some fashion

[rawhat]

It's not very ergonomic right now, though technically possible.

There were a few approaches discussed in the Discord. Just going to copy them for visibility.

Messages

• did a little thinking on potential APIs for this... i think what i'm going to be able to provide would be pretty minimal, i.e. you're kind of on your own. i think it's unfortunately a bit necessary due to how it works. but my initial thought was something like:

  let assert Ok(sse_connection) =
  mist.start_sse(conn, response.new() |> response.add_header(...)) // dunno if headers are valid
  // this is where you'd have to do all the heavy lifting to get whatever data you need...
  // but i'm not sure there's another way
  let resp = mist.send_event(sse_connection, data) // -> Result(Nil, ..)
  // if resp is Error there was some issue with the socket, so you shouldn't try to send any more
  mist.end_events(sse_connection)

• i slept like shit so my brain is not firing on all cylinders rn... i just kinda skimmed some documentation about SSEs. there seems to be stuff like some "retry window" on the response, and probably some other stuff. but i think this would work?

• i could try to do something like the websocket api like you mentioned, but right now that's annoying because i have to spawn a whole separate process for that... which kinda sucks that is likely a better api though?

[rawhat]

Need to do this like the websocket API, as detailed in the last message above.