Exemple #1
0
func (this result) EncodeS() (exp s.Expression, err error) {
	var v1, v2, v3 s.Expression
	v1 = s.Identifier("result")
	v2, err = s.Encode(this.id)
	if err != nil {
		return
	}
	v3, err = s.Encode(this.value)
	if err != nil {
		return
	}
	exp = s.NewList(v1, v2, v3)
	return
}
Exemple #2
0
func WebSocketHandler(conn *websocket.Conn) {
	// Make a new listener which we'll close when the websocket is closed
	listener := NewListener()
	defer listener.Close()

	// Read messages from the user
	go func() {
		for {
			exp, err := s.Read(conn)
			if err != nil {
				if err != io.EOF {
					log.Printf("<- [ERROR] %v", err)
				}
				close(listener)
				return
			}
			log.Printf("<- %v", exp)

			lst, ok := exp.(s.List)
			if !ok {
				listener.Errorf("Invalid request: expected List")
				continue
			}

			n, err := lst.Head()
			if err != nil {
				listener.Errorf("Invalid request: expected at least one item")
				continue
			}

			var action string
			err = n.Scan(&action)
			if err != nil {
				listener.Errorf("Invalid request: expected string")
				continue
			}

			h, ok := handlers[action]
			if !ok {
				listener.Errorf("Unknown action: %v", action)
				continue
			}

			tail, _ := lst.Tail()
			h(listener, tail)
		}
	}()

	// Write messages from the server
	for {
		val, ok := <-listener
		if !ok {
			break
		}
		exp, err := s.Encode(val)
		if err != nil {
			exp, _ = s.Encode(err)
		}
		var buf bytes.Buffer
		err = exp.Write(&buf)
		if err != nil {
			break
		}
		str := buf.String()
		log.Printf("-> %v", str)
		_, err = io.WriteString(conn, str)
		if err != nil {
			break
		}
	}
}