morganhein / crier

A Server-Sent Events manager written in Go.

I'm learning Go, so the code may be rough.

To use this library:

Server Side:

crier := crier.NewCrier()
http.Handle("/events/", crier)
crier.Broadcast(fmt.Sprintf("data: Message: %d - the time is %v\n\n", i, time.Now()))

Client Side:

<script type="text/javascript">
    var source = new EventSource('/events/');
    source.onmessage = function(e) {
        document.body.innerHTML += e.data + '<br>';
    };
</script>

Much love taken from https://github.com/kljensen/golang-html5-sse-example/blob/master/server.go and https://godoc.org/github.com/donovanhide/eventsource

TODO:

• Ability to resend previous event using the history
• Ability to send events to a specific client or group
• Auto-resend previous event if not successfully sent the first time
• Write test cases. I've never done this before, so this'll be fun
• Figure out how to allow importee code to have access to a list of clients