Implement Server Sent Events

[imclint21]

Hey,

This is the first base of the SSE implementation!

Kind regards

[imclint21]

@CephalonRho, for SSE I use written this, we need to ensure that SEE is covered by JWT authentication if it's enabled, what I need to add below?

let sse = warp::path("notifications")
    .and(warp::get())
    .map(|| {
        warp::sse::reply(warp::sse::keep_alive()
            .stream(sse_events()))
    })
    .and(sse_enabled);

PS: sometimes we have verify_auth, sometimes check_webui I think that we need to uniform this!

[imclint21]

It works! (like said Apache)

Just some things to change:

• what I said here https://github.com/lucid-kv/lucid/pull/60#pullrequestreview-374747564
• async is missing for sse_event_stream()
• empty SSE events are broadcast without any reason

An example of empty events:

[imclint21]

I Merge #60 to create a Lucid PoC.