func chatHandler(s sockjs.Session) {
users.Add(s)
defer users.Remove(s)
for {
m := s.Receive()
if m == nil {
break
}
fullAddr := s.Info().RemoteAddr
addr := fullAddr[:strings.LastIndex(fullAddr, ":")]
m = []byte(fmt.Sprintf("%s: %s", addr, m))
users.Broadcast(m)
}
}
