From d3a1624880de10debace0568a3ed072a1c3a7b66 Mon Sep 17 00:00:00 2001
From: fiatjaf <fiatjaf@gmail.com>
Date: Sat, 25 Mar 2023 14:59:35 -0300
Subject: [PATCH] ping every 29 seconds.

fixes https://github.com/nbd-wtf/go-nostr/issues/72
---
 relay.go | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/relay.go b/relay.go
index 60c5e56..0ce5a3c 100644
--- a/relay.go
+++ b/relay.go
@@ -100,6 +100,23 @@ func (r *Relay) Connect(ctx context.Context) error {
 	conn := NewConnection(socket)
 	r.Connection = conn
 
+	// ping every 29 seconds
+	ticker := time.NewTicker(29 * time.Second)
+	defer ticker.Stop()
+	go func() {
+		for {
+			select {
+			case <-ticker.C:
+				err := conn.socket.WriteMessage(websocket.PingMessage, nil)
+				if err != nil {
+					log.Printf("error writing ping: %v; closing websocket", err)
+					return
+				}
+			}
+		}
+	}()
+
+	// handling received messages
 	go func() {
 		for {
 			typ, message, err := conn.socket.ReadMessage()