Golang packets.NewControlPacket函數代碼示例

func Test_persistInbound_pubrel(t *testing.T) {
	ts := &TestStore{}
	pub := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
	pub.Qos = 2
	pub.TopicName = "/pub2"
	pub.Payload = []byte{0xCC, 0x06}
	pub.MessageID = 55
	publishKey := inboundKeyFromMID(pub.MessageID)
	ts.Put(publishKey, pub)

	m := packets.NewControlPacket(packets.Pubrel).(*packets.PubrelPacket)
	m.MessageID = 55

	persistInbound(ts, m) // will overwrite publish

	if len(ts.mput) != 2 {
		t.Fatalf("persistInbound in bad state")
	}

	if len(ts.mget) != 0 {
		t.Fatalf("persistInbound in bad state")
	}

	if len(ts.mdel) != 0 {
		t.Fatalf("persistInbound in bad state")
	}
}

func Test_persistInbound_puback(t *testing.T) {
	ts := &TestStore{}
	pub := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
	pub.Qos = 1
	pub.TopicName = "/pub1"
	pub.Payload = []byte{0xCC, 0x04}
	pub.MessageID = 53
	publishKey := inboundKeyFromMID(pub.MessageID)
	ts.Put(publishKey, pub)

	m := packets.NewControlPacket(packets.Puback).(*packets.PubackPacket)
	m.MessageID = 53

	persistInbound(ts, m) // "deletes" packets.Publish from store

	if len(ts.mput) != 1 { // not actually deleted in TestStore
		t.Fatalf("persistInbound in bad state")
	}

	if len(ts.mget) != 0 {
		t.Fatalf("persistInbound in bad state")
	}

	if len(ts.mdel) != 1 || ts.mdel[0] != 53 {
		t.Fatalf("persistInbound in bad state")
	}
}

func Test_persistInbound_pubrec(t *testing.T) {
	ts := &TestStore{}
	pub := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
	pub.Qos = 2
	pub.TopicName = "/pub2"
	pub.Payload = []byte{0xCC, 0x05}
	pub.MessageID = 54
	publishKey := inboundKeyFromMID(pub.MessageID)
	ts.Put(publishKey, pub)

	m := packets.NewControlPacket(packets.Pubrec).(*packets.PubrecPacket)
	m.MessageID = 54

	persistInbound(ts, m)

	if len(ts.mput) != 1 || ts.mput[0] != 54 {
		t.Fatalf("persistInbound in bad state")
	}

	if len(ts.mget) != 0 {
		t.Fatalf("persistInbound in bad state")
	}

	if len(ts.mdel) != 0 {
		t.Fatalf("persistInbound in bad state")
	}
}

func Test_MatchAndDispatch(t *testing.T) {
	calledback := make(chan bool)

	cb := func(c *Client, m Message) {
		calledback <- true
	}

	pub := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
	pub.Qos = 2
	pub.TopicName = "a"
	pub.Payload = []byte("foo")

	msgs := make(chan *packets.PublishPacket)

	router, stopper := newRouter()
	router.addRoute("a", cb)

	router.matchAndDispatch(msgs, true, nil)

	msgs <- pub

	<-calledback

	stopper <- true

	select {
	case msgs <- pub:
		t.Errorf("msgs should not have a listener")
	default:
	}

}

// SubscribeMultiple starts a new subscription for multiple topics. Provide a MessageHandler to
// be executed when a message is published on one of the topics provided.
func (c *Client) SubscribeMultiple(filters map[string]byte, callback MessageHandler) Token {
	var err error
	token := newToken(packets.Subscribe).(*SubscribeToken)
	DEBUG.Println(CLI, "enter SubscribeMultiple")
	if !c.IsConnected() {
		token.err = ErrNotConnected
		token.flowComplete()
		return token
	}
	sub := packets.NewControlPacket(packets.Subscribe).(*packets.SubscribePacket)
	if sub.Topics, sub.Qoss, err = validateSubscribeMap(filters); err != nil {
		token.err = err
		return token
	}

	if callback != nil {
		for topic := range filters {
			c.msgRouter.addRoute(topic, callback)
		}
	}
	token.subs = make([]string, len(sub.Topics))
	copy(token.subs, sub.Topics)
	//c.oboundP <- &PacketAndToken{p: sub, t: token}
	sendServer(c, sub, token)
	DEBUG.Println(CLI, "exit SubscribeMultiple")
	return token
}

// Subscribe starts a new subscription. Provide a MessageHandler to be executed when
// a message is published on the topic provided.
func (c *Client) Subscribe(topic string, qos byte, callback MessageHandler) Token {
	token := newToken(packets.Subscribe).(*SubscribeToken)
	DEBUG.Println(CLI, "enter Subscribe")
	if !c.IsConnected() {
		token.err = ErrNotConnected
		token.flowComplete()
		return token
	}
	sub := packets.NewControlPacket(packets.Subscribe).(*packets.SubscribePacket)
	if err := validateTopicAndQos(topic, qos); err != nil {
		token.err = err
		return token
	}
	sub.Topics = append(sub.Topics, topic)
	sub.Qoss = append(sub.Qoss, qos)
	DEBUG.Println(sub.String())

	if callback != nil {
		c.msgRouter.addRoute(topic, callback)
	}

	token.subs = append(token.subs, topic)
	//c.oboundP <- &PacketAndToken{p: sub, t: token}
	sendServer(c, sub, token)
	DEBUG.Println(CLI, "exit Subscribe")
	return token
}

// Publish will publish a message with the specified QoS
// and content to the specified topic.
// Returns a read only channel used to track
// the delivery of the message.
func (c *Client) Publish(topic string, qos byte, retained bool, payload interface{}) Token {
	token := newToken(packets.Publish).(*PublishToken)
	DEBUG.Println(CLI, "enter Publish")
	if !c.IsConnected() {
		token.err = ErrNotConnected
		token.flowComplete()
		return token
	}
	pub := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
	pub.Qos = qos
	pub.TopicName = topic
	pub.Retain = retained
	switch payload.(type) {
	case string:
		pub.Payload = []byte(payload.(string))
	case []byte:
		pub.Payload = payload.([]byte)
	default:
		token.err = errors.New("Unknown payload type")
		token.flowComplete()
		return token
	}

	DEBUG.Println(CLI, "sending publish message, topic:", topic)

	c.obound <- &PacketAndToken{p: pub, t: token}
	return token
}

func newConnectMsgFromOptions(options *ClientOptions) *packets.ConnectPacket {
	m := packets.NewControlPacket(packets.Connect).(*packets.ConnectPacket)

	m.CleanSession = options.CleanSession
	m.WillFlag = options.WillEnabled
	m.WillRetain = options.WillRetained
	m.ClientIdentifier = options.ClientID

	if options.WillEnabled {
		m.WillQos = options.WillQos
		m.WillTopic = options.WillTopic
		m.WillMessage = options.WillPayload
	}

	if options.Username != "" {
		m.UsernameFlag = true
		m.Username = options.Username
		//mustn't have password without user as well
		if options.Password != "" {
			m.PasswordFlag = true
			m.Password = []byte(options.Password)
		}
	}

	m.KeepaliveTimer = uint16(options.KeepAlive.Seconds())

	return m
}

func Test_NewPingReqMessage(t *testing.T) {
	pr := packets.NewControlPacket(packets.Pingreq).(*packets.PingreqPacket)
	if pr.MessageType != packets.Pingreq {
		t.Errorf("NewPingReqMessage bad msg type: %v", pr.MessageType)
	}
	if pr.RemainingLength != 0 {
		t.Errorf("NewPingReqMessage bad remlen, expected 0, got %d", pr.RemainingLength)
	}

	exp := []byte{
		0xC0,
		0x00,
	}

	var buf bytes.Buffer
	pr.Write(&buf)
	bs := buf.Bytes()

	if len(bs) != 2 {
		t.Errorf("NewPingReqMessage.Bytes() wrong length: %d", len(bs))
	}

	if exp[0] != bs[0] || exp[1] != bs[1] {
		t.Errorf("NewPingMessage.Bytes() wrong")
	}
}

func Test_FileStore_Get(t *testing.T) {
	storedir := "/tmp/TestStore/_get"
	f := NewFileStore(storedir)
	f.Open()
	pm := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
	pm.Qos = 1
	pm.TopicName = "/a/b/c"
	pm.Payload = []byte{0xBE, 0xEF, 0xED}
	pm.MessageID = 120

	key := outboundKeyFromMID(pm.MessageID)
	f.Put(key, pm)

	if !exists(storedir + "/o.120.msg") {
		t.Fatalf("message not in store")
	}

	exp := []byte{
		/* msg type */
		0x32, // qos 1

		/* remlen */
		0x0d,

		/* topic, msg id in varheader */
		0x00, // length of topic
		0x06,
		0x2F, // /
		0x61, // a
		0x2F, // /
		0x62, // b
		0x2F, // /
		0x63, // c

		/* msg id (is always 2 bytes) */
		0x00,
		0x78,

		/*payload */
		0xBE,
		0xEF,
		0xED,
	}

	m := f.Get(key)

	if m == nil {
		t.Fatalf("message not retreived from store")
	}

	var msg bytes.Buffer
	m.Write(&msg)
	if !bytes.Equal(exp, msg.Bytes()) {
		t.Fatal("message from store not same as what went in", msg.Bytes())
	}
}

func Test_MemoryStore_Get(t *testing.T) {
	m := NewMemoryStore()
	m.Open()
	pm := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
	pm.Qos = 1
	pm.TopicName = "/a/b/c"
	pm.Payload = []byte{0xBE, 0xEF, 0xED}
	pm.MessageID = 120

	key := outboundKeyFromMID(pm.MessageID)
	m.Put(key, pm)

	if len(m.messages) != 1 {
		t.Fatalf("message not in store")
	}

	exp := []byte{
		/* msg type */
		0x32, // qos 1

		/* remlen */
		0x0d,

		/* topic, msg id in varheader */
		0x00, // length of topic
		0x06,
		0x2F, // /
		0x61, // a
		0x2F, // /
		0x62, // b
		0x2F, // /
		0x63, // c

		/* msg id (is always 2 bytes) */
		0x00,
		0x78,

		/*payload */
		0xBE,
		0xEF,
		0xED,
	}

	msg := m.Get(key)

	if msg == nil {
		t.Fatalf("message not retreived from store")
	}

	var buf bytes.Buffer
	msg.Write(&buf)
	if !bytes.Equal(exp, buf.Bytes()) {
		t.Fatalf("message from store not same as what went in")
	}
}

// Disconnect will end the connection with the server, but not before waiting
// the specified number of milliseconds to wait for existing work to be
// completed.
func (c *Client) Disconnect(quiesce uint) {
	if !c.IsConnected() {
		WARN.Println(CLI, "already disconnected")
		return
	}
	DEBUG.Println(CLI, "disconnecting")
	c.setConnected(false)

	dm := packets.NewControlPacket(packets.Disconnect).(*packets.DisconnectPacket)
	dt := newToken(packets.Disconnect)
	c.oboundP <- &PacketAndToken{p: dm, t: dt}

	// wait for work to finish, or quiesce time consumed
	dt.WaitTimeout(time.Duration(quiesce) * time.Millisecond)
	c.disconnect()
}

func Test_MemoryStore_write(t *testing.T) {
	m := NewMemoryStore()
	m.Open()

	pm := packets.NewControlPacket(packets.Publish).(*packets.PublishPacket)
	pm.Qos = 1
	pm.TopicName = "/a/b/c"
	pm.Payload = []byte{0xBE, 0xEF, 0xED}
	pm.MessageID = 91
	key := inboundKeyFromMID(pm.MessageID)
	m.Put(key, pm)

	if len(m.messages) != 1 {
		t.Fatalf("message not in store")
	}
}

func Test_persistInbound_connack(t *testing.T) {
	ts := &TestStore{}
	m := packets.NewControlPacket(packets.Connack)
	persistInbound(ts, m)

	if len(ts.mput) != 0 {
		t.Fatalf("persistInbound in bad state")
	}

	if len(ts.mget) != 0 {
		t.Fatalf("persistInbound in bad state")
	}

	if len(ts.mdel) != 0 {
		t.Fatalf("persistInbound in bad state")
	}
}

func Test_persistOutbound_disconnect(t *testing.T) {
	ts := &TestStore{}
	m := packets.NewControlPacket(packets.Disconnect)
	persistOutbound(ts, m)

	if len(ts.mput) != 0 {
		t.Fatalf("persistOutbound put message it should not have")
	}

	if len(ts.mget) != 0 {
		t.Fatalf("persistOutbound get message it should not have")
	}

	if len(ts.mdel) != 0 {
		t.Fatalf("persistOutbound del message it should not have")
	}
}