SSE - unders/mywiki GitHub Wiki Spec server-sent-events eventsource/ Polyfill event-source-polyfill JavaScript sse-websockets-data-flow-http2 Go golang-html5-sse-example peterhellberg/sseclient writing-a-server-sent-events-server-in-go hy-is-golang-http-responsewriter-execution-being-delayed go-eventsource Dart dart-eventsource Articles server-sent-events server-sent-events