func (h *Heartbeat) request() {
// close the session on any errors
defer h.sess.Close()
// request highest possible priority for heartbeats
priority := frame.StreamPriority(0x7FFFFFFF)
stream, err := h.sess.OpenStream(priority, heartbeatExtensionType, false)
if err != nil {
return
}
// send heartbeats and then check that we got them back
var id uint32
for {
time.Sleep(h.interval)
if err := binary.Write(stream, binary.BigEndian, id); err != nil {
return
}
var respId uint32
if err := binary.Read(stream, binary.BigEndian, &respId); err != nil {
return
}
if id != respId {
return
}
// record the time
h.mark <- 1
}
}
func (a *sessionAdaptor) OpenStream(priority StreamPriority, streamType StreamType, fin bool) (Stream, error) {
str, err := a.ISession.OpenStream(frame.StreamPriority(priority), frame.StreamType(streamType), fin)
return &streamAdaptor{str}, err
}