func (e *echoChar) echo(req ble.Request, n ble.Notifier) {
ch := make(chan []byte)
e.Lock()
e.m[req.Conn().RemoteAddr().String()] = ch
e.Unlock()
log.Printf("echo: Notification subscribed")
defer func() {
e.Lock()
delete(e.m, req.Conn().RemoteAddr().String())
e.Unlock()
}()
for {
select {
case <-n.Context().Done():
log.Printf("echo: Notification unsubscribed")
return
case <-time.After(time.Second * 20):
log.Printf("echo: timeout")
return
case msg := <-ch:
if _, err := n.Write(msg); err != nil {
log.Printf("echo: can't indicate: %s", err)
return
}
}
}
}
func (e *echoChar) written(req ble.Request, rsp ble.ResponseWriter) {
e.Lock()
e.m[req.Conn().RemoteAddr().String()] <- req.Data()
e.Unlock()
}