func responder(port string) {
// A simple echo operation with a 500ms response delay
gotalk.HandleBufferRequest("echo", func(s *gotalk.Sock, op string, buf []byte) ([]byte, error) {
println("responder: handling request")
return buf, nil
})
// Start a server
s, err := gotalk.Listen("tcp", "localhost:"+port)
if err != nil {
panic(err)
}
// Print when we receive heartbeats
s.OnHeartbeat = func(load int, t time.Time) {
fmt.Printf("responder: received heartbeat: load=%v, time=%v\n", load, t)
}
// Configure limits with a read timeout of one second
s.Limits = gotalk.NewLimits(0, 0)
s.Limits.SetReadTimeout(time.Second)
// Accept connections
println("responder: listening at", s.Addr())
go s.Accept()
}
func client(port string) {
gotalk.HandleBufferRequest("ping", func(_ *gotalk.Sock, _ string, b []byte) ([]byte, error) {
fmt.Printf("client: handling 'ping' request: %q\n", string(b))
return []byte("pong"), nil
})
// Connect to the server
s, err := gotalk.Connect("tcp", "localhost:"+port)
if err != nil {
panic(err)
}
fmt.Printf("client: connected to %s\n", s.Addr())
// Send a notification as JSON
fmt.Printf("client: sending 'msg' notification\n")
if err := s.Notify("msg", struct{ Msg string }{"World"}); err != nil {
fmt.Printf("client: notification: %v\n", err.Error())
}
// Send a notification as byte string
fmt.Printf("client: sending 'msg' notification\n")
if err := s.BufferNotify("msg", []byte("Hello")); err != nil {
fmt.Printf("client: notification: error %v\n", err.Error())
}
// Send a request & read result via JSON-encoded go values
fmt.Printf("client: sending 'greet' request\n")
greeting := GreetOut{}
if err := s.Request("greet", GreetIn{"Rasmus"}, &greeting); err != nil {
fmt.Printf("client: greet: error %v\n", err.Error())
} else {
fmt.Printf("client: greet: %+v\n", greeting)
}
// Send a request & read result as byte strings
fmt.Printf("client: sending 'echo' request\n")
b, err := s.BufferRequest("echo", []byte("abc"))
if err != nil {
fmt.Printf("client: echo: error %v\n", err.Error())
} else {
fmt.Printf("client: echo: %v\n", string(b))
}
s.Close()
}
func main() {
gotalk.Handle("greet", func(in GreetIn) (GreetOut, error) {
println("in greet handler: in.Name=", in.Name)
return GreetOut{"Hello " + in.Name}, nil
})
gotalk.HandleBufferRequest("echó", func(s *gotalk.Sock, op string, b []byte) ([]byte, error) {
return b, nil
})
ws := gotalk.WebSocketHandler()
ws.OnAccept = onAccept
http.Handle("/gotalk/", ws)
http.Handle("/", http.FileServer(http.Dir(".")))
err := http.ListenAndServe(":1234", nil)
if err != nil {
panic(err)
}
}
func responder(port string) {
// A simple echo operation with a 500ms response delay
gotalk.HandleBufferRequest("echo", func(s *gotalk.Sock, op string, buf []byte) ([]byte, error) {
println("responder: handling request")
time.Sleep(time.Millisecond * 400)
return buf, nil
})
// Start a server
s, err := gotalk.Listen("tcp", "localhost:"+port)
if err != nil {
panic(err)
}
// Limit this server to 5 concurrent requests (and disable streaming messages)
s.Limits = gotalk.NewLimits(5, 0)
// Accept connections
println("listening at", s.Addr())
go s.Accept()
}
