WriteHeader and add a delay to push last seen

main.go

@@ -79,6 +79,7 @@ func Subscribe(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
   w.Header().Set("Content-Type", "text/event-stream")
   w.Header().Set("Cache-Control", "no-cache")
   w.Header().Set("Connection", "keep-alive")
+  w.WriteHeader(200)
 
   userId := p.ByName("userid")
 
@@ -94,6 +95,7 @@ func Subscribe(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
   ticker := time.NewTicker(25 * time.Second)
 
   // Push cached value (if it exists) to the connection
+  go func(){
     cachedTime, err1 := redisClient.HGet(userId, "time").Result()
     cachedStatus, err2 := redisClient.HGet(userId, "status").Result()
     if err1 == nil && err2 == nil {
@@ -105,11 +107,13 @@ func Subscribe(w http.ResponseWriter, r *http.Request, p httprouter.Params) {
         }
         pingBytes, err := json.Marshal(&ping)
         if err == nil {
+          time.Sleep(1 * time.Second)
           fmt.Fprintf(w, "data: %s\n\n", pingBytes)
           flusher.Flush()
         }
       }
     }
+  }()
 
   for {
     select {