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libmqtt.go
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libmqtt.go
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package main
/* vim: set ts=2 sw=2 sts=2 ff=unix ft=go noet: */
import (
"fmt"
"time"
"github.com/goiiot/libmqtt"
)
var mqttClient libmqtt.Client
func mqttSubscribe(name string) {
log.Debugf("Subscribing: %s", name)
mqttClient.Subscribe(&libmqtt.Topic{Name: name})
}
func pubHandler(topic string, err error) {
if err != nil {
log.Error("PubErr:", err)
} else {
log.Infof("Pub: %s", topic)
}
}
func subHandler(topics []*libmqtt.Topic, err error) {
if err != nil {
log.Error("SubErr:", err)
// TODO: We musr recover this first!!!
} else {
for _, topic := range topics {
log.Infof("Subscribed: %s", topic)
}
}
}
func unSubHandler(topics []string, err error) {
if err != nil {
log.Error("UnSubErr:", err)
} else {
for _, topic := range topics {
log.Infof("UnSubscribed: %s", topic)
}
}
}
func netHandler(server string, err error) {
if err != nil {
log.Error("NetErr:", server, err)
} else {
log.Infof("ServerConnected: %s", server)
}
}
func persistHandler(err error) {
if err != nil {
log.Error("PersistErr:", err)
} else {
log.Infof("PersistHandler")
}
}
func mqttConnect(host string, port uint16, name, user, pass string) {
mqtturi := fmt.Sprintf("%s:%d", host, port)
var err error
mqttClient, err = libmqtt.NewClient(
libmqtt.WithServer(mqtturi),
libmqtt.WithBuf(512, 512), // send, recv
libmqtt.WithClientID(name),
libmqtt.WithDialTimeout(2), // Connection timeout
libmqtt.WithIdentity(user, pass),
libmqtt.WithKeepalive(30, 1),
libmqtt.WithLog(libmqtt.Info), // Silent/Verbose/Debug/Info/Warning/Error
libmqtt.WithRouter(libmqtt.NewRegexRouter()),
//libmqtt.WithPersist
libmqtt.WithBackoffStrategy(1*time.Second, 30*time.Second, 1.5),
libmqtt.WithAutoReconnect(true),
)
if err != nil {
// handle client creation error
log.Panic("mqttClient creation ERR:", err)
}
mqttClient.HandlePub(pubHandler)
mqttClient.HandleSub(subHandler)
mqttClient.HandleUnSub(unSubHandler)
// register handler for net error (optional, but recommended)
mqttClient.HandleNet(netHandler)
// register handler for persist error (optional, but recommended)
mqttClient.HandlePersist(persistHandler)
mqttClient.Handle(".*",
func(topic string, qos libmqtt.QosLevel, msg []byte) {
espMessageHandler(topic, msg)
})
// connect to server
mqttClient.Connect(func(server string, code byte, err error) {
if err != nil {
log.Error("mqttConnect ERR:", err)
return
}
if code != libmqtt.CodeSuccess {
// server rejected or in error
log.Panicf("mqttConnect server CODE: %d", code)
}
espInit()
})
}