├── .gitignore
├── Gopkg.lock
├── Gopkg.toml
├── Makefile
├── README.md
└── main.go


/.gitignore:
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1 | vendor
2 | 


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/Gopkg.lock:
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 1 | # This file is autogenerated, do not edit; changes may be undone by the next 'dep ensure'.
 2 | 
 3 | 
 4 | [[projects]]
 5 |   name = "github.com/eclipse/paho.mqtt.golang"
 6 |   packages = [".","packets"]
 7 |   revision = "aff15770515e3c57fc6109da73d42b0d46f7f483"
 8 |   version = "v1.1.0"
 9 | 
10 | [[projects]]
11 |   branch = "master"
12 |   name = "golang.org/x/net"
13 |   packages = ["proxy","websocket"]
14 |   revision = "a04bdaca5b32abe1c069418fb7088ae607de5bd0"
15 | 
16 | [solve-meta]
17 |   analyzer-name = "dep"
18 |   analyzer-version = 1
19 |   inputs-digest = "4b1e2f372b614cd9bb649cbca18cc5f79b2ad7ee294c4e85011e0287bfd9dfbe"
20 |   solver-name = "gps-cdcl"
21 |   solver-version = 1
22 | 


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/Gopkg.toml:
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 1 | 
 2 | # Gopkg.toml example
 3 | #
 4 | # Refer to https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md
 5 | # for detailed Gopkg.toml documentation.
 6 | #
 7 | # required = ["github.com/user/thing/cmd/thing"]
 8 | # ignored = ["github.com/user/project/pkgX", "bitbucket.org/user/project/pkgA/pkgY"]
 9 | #
10 | # [[constraint]]
11 | #   name = "github.com/user/project"
12 | #   version = "1.0.0"
13 | #
14 | # [[constraint]]
15 | #   name = "github.com/user/project2"
16 | #   branch = "dev"
17 | #   source = "github.com/myfork/project2"
18 | #
19 | # [[override]]
20 | #  name = "github.com/x/y"
21 | #  version = "2.4.0"
22 | 
23 | 
24 | [[constraint]]
25 |   name = "github.com/eclipse/paho.mqtt.golang"
26 |   version = "1.1.0"
27 | 


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/Makefile:
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1 | all: deps run
2 | 
3 | deps:
4 | 	@dep ensure
5 | 
6 | run:
7 | 	@go run main.go
8 | 


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/README.md:
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 1 | # Go MQTT Example
 2 | 
 3 | This is a simple Go example on how to interact with MQTT.
 4 | 
 5 | This example sends a messages every second and the same process receive the message and prints it to the console.
 6 | 
 7 | ## Getting started
 8 | 
 9 | * Make sure you have [dep](https://github.com/golang/dep) installed
10 | * Clone this repo `git clone https://github.com/CloudMQTT/go-mqtt-example.git`
11 | * `export CLOUDMQTT_URL=mqtt://<user>:<pass>@<server>.cloudmqtt.com:<port>/<topic>`
12 | * Run `make` to download dependencies and run the application
13 | 
14 | 


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/main.go:
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 1 | package main
 2 | 
 3 | import (
 4 | 	"fmt"
 5 | 	"log"
 6 | 	"net/url"
 7 | 	"os"
 8 | 	"time"
 9 | 
10 | 	mqtt "github.com/eclipse/paho.mqtt.golang"
11 | )
12 | 
13 | func connect(clientId string, uri *url.URL) mqtt.Client {
14 | 	opts := createClientOptions(clientId, uri)
15 | 	client := mqtt.NewClient(opts)
16 | 	token := client.Connect()
17 | 	for !token.WaitTimeout(3 * time.Second) {
18 | 	}
19 | 	if err := token.Error(); err != nil {
20 | 		log.Fatal(err)
21 | 	}
22 | 	return client
23 | }
24 | 
25 | func createClientOptions(clientId string, uri *url.URL) *mqtt.ClientOptions {
26 | 	opts := mqtt.NewClientOptions()
27 | 	opts.AddBroker(fmt.Sprintf("tcp://%s", uri.Host))
28 | 	opts.SetUsername(uri.User.Username())
29 | 	password, _ := uri.User.Password()
30 | 	opts.SetPassword(password)
31 | 	opts.SetClientID(clientId)
32 | 	return opts
33 | }
34 | 
35 | func listen(uri *url.URL, topic string) {
36 | 	client := connect("sub", uri)
37 | 	client.Subscribe(topic, 0, func(client mqtt.Client, msg mqtt.Message) {
38 | 		fmt.Printf("* [%s] %s\n", msg.Topic(), string(msg.Payload()))
39 | 	})
40 | }
41 | 
42 | func main() {
43 | 	uri, err := url.Parse(os.Getenv("CLOUDMQTT_URL"))
44 | 	if err != nil {
45 | 		log.Fatal(err)
46 | 	}
47 | 	topic := uri.Path[1:len(uri.Path)]
48 | 	if topic == "" {
49 | 		topic = "test"
50 | 	}
51 | 
52 | 	go listen(uri, topic)
53 | 
54 | 	client := connect("pub", uri)
55 | 	timer := time.NewTicker(1 * time.Second)
56 | 	for t := range timer.C {
57 | 		client.Publish(topic, 0, false, t.String())
58 | 	}
59 | }
60 | 


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