feat(middleware): Make logging http writer SSE compatible

Author: Neurostep

pkg/middleware/logger.go

@@ -124,6 +124,12 @@ func (lrw *loggingResponseWriter) WriteHeader(code int) {
 	lrw.ResponseWriter.WriteHeader(code)
 }
 
+func (lrw *loggingResponseWriter) Flush() {
+	if f, ok := lrw.ResponseWriter.(http.Flusher); ok {
+		f.Flush()
+	}
+}
+
 func newLoggingResponseWriter(w http.ResponseWriter) *loggingResponseWriter {
 	// WriteHeader(int) is not called if our response implicitly returns 200 OK, so
 	// we default to that status code.