func main() {
tlsconfig := NewTlsConfig()
opts := MQTT.NewClientOptions()
opts.AddBroker("ssl://hushbox.net:17004")
opts.SetClientId("ssl-sample").SetTlsConfig(tlsconfig)
opts.SetDefaultPublishHandler(f)
// Start the connection
c := MQTT.NewClient(opts)
_, err := c.Start()
if err != nil {
panic(err)
}
filter, _ := MQTT.NewTopicFilter("/go-mqtt/sample", 0)
c.StartSubscription(nil, filter)
i := 0
for _ = range time.Tick(time.Duration(1) * time.Second) {
if i == 5 {
break
}
text := fmt.Sprintf("this is msg #%d!", i)
c.Publish(MQTT.QOS_ZERO, "/go-mqtt/sample", []byte(text))
i++
}
c.Disconnect(250)
}
func main() {
myNoOpStore := &NoOpStore{}
opts := MQTT.NewClientOptions()
opts.AddBroker("tcp://test.mosquitto.org:1883")
opts.SetClientId("custom-store")
opts.SetStore(myNoOpStore)
var callback MQTT.MessageHandler = func(client *MQTT.MqttClient, msg MQTT.Message) {
fmt.Printf("TOPIC: %s\n", msg.Topic())
fmt.Printf("MSG: %s\n", msg.Payload())
}
c := MQTT.NewClient(opts)
_, err := c.Start()
if err != nil {
panic(err)
}
filter, _ := MQTT.NewTopicFilter("/go-mqtt/sample", 0)
c.StartSubscription(callback, filter)
for i := 0; i < 5; i++ {
text := fmt.Sprintf("this is msg #%d!", i)
c.Publish(MQTT.QOS_ONE, "/go-mqtt/sample", []byte(text))
}
for i := 1; i < 5; i++ {
time.Sleep(1 * time.Second)
}
c.Disconnect(250)
}
func main() {
opts := MQTT.NewClientOptions().AddBroker("tcp://test.mosquitto.org:1883").SetClientId("trivial")
opts.SetDefaultPublishHandler(f)
c := MQTT.NewClient(opts)
_, err := c.Start()
if err != nil {
panic(err)
}
filter, _ := MQTT.NewTopicFilter("/go-mqtt/sample", 0)
if receipt, err := c.StartSubscription(nil, filter); err != nil {
fmt.Println(err)
os.Exit(1)
} else {
<-receipt
}
for i := 0; i < 5; i++ {
text := fmt.Sprintf("this is msg #%d!", i)
receipt := c.Publish(MQTT.QOS_ONE, "/go-mqtt/sample", []byte(text))
<-receipt
}
time.Sleep(3 * time.Second)
if receipt, err := c.EndSubscription("/go-mqtt/sample"); err != nil {
fmt.Println(err)
os.Exit(1)
} else {
<-receipt
}
c.Disconnect(250)
}
func main() {
opts := MQTT.NewClientOptions().AddBroker("tcp://test.mosquitto.org:1883").SetClientId("router-sample")
opts.SetCleanSession(true)
c := MQTT.NewClient(opts)
_, err := c.Start()
if err != nil {
panic(err)
}
loadFilter, _ := MQTT.NewTopicFilter("$SYS/broker/load/#", 0)
if receipt, err := c.StartSubscription(brokerLoadHandler, loadFilter); err != nil {
fmt.Println(err)
os.Exit(1)
} else {
<-receipt
}
connectionFilter, _ := MQTT.NewTopicFilter("$SYS/broker/connection/#", 0)
if receipt, err := c.StartSubscription(brokerConnectionHandler, connectionFilter); err != nil {
fmt.Println(err)
os.Exit(1)
} else {
<-receipt
}
clientsFilter, _ := MQTT.NewTopicFilter("$SYS/broker/clients/#", 0)
if receipt, err := c.StartSubscription(brokerClientsHandler, clientsFilter); err != nil {
fmt.Println(err)
os.Exit(1)
} else {
<-receipt
}
num_bload := 0
num_bconns := 0
num_bclients := 0
for i := 0; i < 100; i++ {
select {
case <-broker_load:
num_bload++
case <-broker_connection:
num_bconns++
case <-broker_clients:
num_bclients++
}
}
fmt.Printf("Received %3d Broker Load messages\n", num_bload)
fmt.Printf("Received %3d Broker Connection messages\n", num_bconns)
fmt.Printf("Received %3d Broker Clients messages\n", num_bclients)
c.Disconnect(250)
}
func (p *MQTTPublisher) configureMqttConnection() {
connOpts := MQTT.NewClientOptions().
AddBroker(p.config.URL).
SetClientId(p.clientId).
SetCleanSession(true).
SetOnConnectionLost(p.onConnectionLost)
// Username/password authentication
if p.config.Username != "" && p.config.Password != "" {
connOpts.SetUsername(p.config.Username)
connOpts.SetPassword(p.config.Password)
}
// SSL/TLS
if strings.HasPrefix(p.config.URL, "ssl") {
tlsConfig := &tls.Config{}
// Custom CA to auth broker with a self-signed certificate
if p.config.CaFile != "" {
caFile, err := ioutil.ReadFile(p.config.CaFile)
if err != nil {
logger.Printf("MQTTPublisher.configureMqttConnection() ERROR: failed to read CA file %s:%s\n", p.config.CaFile, err.Error())
} else {
tlsConfig.RootCAs = x509.NewCertPool()
ok := tlsConfig.RootCAs.AppendCertsFromPEM(caFile)
if !ok {
logger.Printf("MQTTPublisher.configureMqttConnection() ERROR: failed to parse CA certificate %s\n", p.config.CaFile)
}
}
}
// Certificate-based client authentication
if p.config.CertFile != "" && p.config.KeyFile != "" {
cert, err := tls.LoadX509KeyPair(p.config.CertFile, p.config.KeyFile)
if err != nil {
logger.Printf("MQTTPublisher.configureMqttConnection() ERROR: failed to load client TLS credentials: %s\n",
err.Error())
} else {
tlsConfig.Certificates = []tls.Certificate{cert}
}
}
connOpts.SetTlsConfig(tlsConfig)
}
p.client = MQTT.NewClient(connOpts)
}
func main() {
stdin := bufio.NewReader(os.Stdin)
hostname, _ := os.Hostname()
server := flag.String("server", "tcp://127.0.0.1:1883", "The full URL of the MQTT server to connect to")
topic := flag.String("topic", hostname, "Topic to publish the messages on")
qos := flag.Int("qos", 0, "The QoS to send the messages at")
//retained := flag.Bool("retained", false, "Are the messages sent with the retained flag")
clientid := flag.String("clientid", hostname+strconv.Itoa(time.Now().Second()), "A clientid for the connection")
username := flag.String("username", "", "A username to authenticate to the MQTT server")
password := flag.String("password", "", "Password to match username")
flag.Parse()
connOpts := MQTT.NewClientOptions().AddBroker(*server).SetClientId(*clientid).SetCleanSession(true)
if *username != "" {
connOpts.SetUsername(*username)
if *password != "" {
connOpts.SetPassword(*password)
}
}
client := MQTT.NewClient(connOpts)
_, err := client.Start()
if err != nil {
panic(err)
} else {
fmt.Printf("Connected to %s\n", *server)
}
for {
message, err := stdin.ReadString('\n')
if err == io.EOF {
os.Exit(0)
}
r := client.Publish(MQTT.QoS(*qos), *topic, []byte(strings.TrimSpace(message)))
<-r
fmt.Println("Message Sent")
}
}
func main() {
topic := flag.String("topic", "", "The topic name to/from which to publish/subscribe")
broker := flag.String("broker", "", "The broker URI. ex: tcp://10.10.1.1:1883")
password := flag.String("password", "", "The password (optional)")
user := flag.String("user", "", "The User (optional)")
id := flag.String("id", "", "The ClientID (optional)")
cleansess := flag.Bool("clean", false, "Set Clean Session (default false)")
qos := flag.Int("qos", 0, "The Quality of Service 0,1,2 (default 0)")
num := flag.Int("num", 1, "The number of messages to publish or subscribe (default 1)")
payload := flag.String("message", "", "The message text to publish (default empty)")
action := flag.String("action", "", "Action publish or subscribe (required)")
store := flag.String("store", ":memory:", "The Store Directory (default use memory store)")
flag.Parse()
if *broker == "" {
fmt.Println("Invalid setting for -broker")
return
}
if *action != "pub" && *action != "sub" {
fmt.Println("Invalid setting for -action, must be pub or sub")
return
}
if *topic == "" {
fmt.Println("Invalid setting for -topic, must not be empty")
return
}
fmt.Printf("Sample Info:\n")
fmt.Printf("\taction: %s\n", *action)
fmt.Printf("\tbroker: %s\n", *broker)
fmt.Printf("\tclientid: %s\n", *id)
fmt.Printf("\tuser: %s\n", *user)
fmt.Printf("\tpassword: %s\n", *password)
fmt.Printf("\ttopic: %s\n", *topic)
fmt.Printf("\tmessage: %s\n", *payload)
fmt.Printf("\tqos: %d\n", *qos)
fmt.Printf("\tcleansess: %v\n", *cleansess)
fmt.Printf("\tnum: %d\n", *num)
fmt.Printf("\tstore: %s\n", *store)
opts := MQTT.NewClientOptions()
opts.AddBroker(*broker)
opts.SetClientId(*id)
opts.SetUsername(*user)
opts.SetPassword(*password)
opts.SetCleanSession(*cleansess)
if *store != ":memory:" {
opts.SetStore(MQTT.NewFileStore(*store))
}
if *action == "pub" {
client := MQTT.NewClient(opts)
_, err := client.Start()
gotareceipt := make(chan bool)
if err != nil {
panic(err)
}
fmt.Println("Sample Publisher Started")
for i := 0; i < *num; i++ {
fmt.Println("---- doing publish ----")
receipt := client.Publish(MQTT.QoS(*qos), *topic, []byte(*payload))
go func() {
<-receipt
fmt.Println(" message delivered!")
gotareceipt <- true
}()
}
for i := 0; i < *num; i++ {
<-gotareceipt
}
client.Disconnect(250)
fmt.Println("Sample Publisher Disconnected")
} else {
num_received := 0
choke := make(chan [2]string)
opts.SetDefaultPublishHandler(func(client *MQTT.MqttClient, msg MQTT.Message) {
choke <- [2]string{msg.Topic(), string(msg.Payload())}
})
client := MQTT.NewClient(opts)
_, err := client.Start()
if err != nil {
panic(err)
}
filter, e := MQTT.NewTopicFilter(*topic, byte(*qos))
if e != nil {
fmt.Println(e)
os.Exit(1)
}
client.StartSubscription(nil, filter)
for num_received < *num {
incoming := <-choke
fmt.Printf("RECEIVED TOPIC: %s MESSAGE: %s\n", incoming[0], incoming[1])
num_received++
}
client.Disconnect(250)
fmt.Println("Sample Subscriber Disconnected")
}
}
