mqttsub.go

package main

import (
	"github.com/godaner/brokerc/broker"
	"github.com/godaner/brokerc/broker/mqttv1"
	"github.com/urfave/cli"
	"os"
	"os/signal"
)

var MQTTSubscribeCommand = cli.Command{
	Name:      "mqttsub",
	Usage:     "subscribe mqtt message",
	UsageText: "Usage: brokerc mqttsub [options...] <uri>, uri arg format: mqtt[s]://[username][:password]@host.domain[:port]",
	Flags: []cli.Flag{
		cli.StringFlag{
			Name:     "t",
			Usage:    "topic.",
			Required: true,
		},
		cli.StringFlag{
			Name:     "i",
			Usage:    "client id.",
			Required: false,
		},
		cli.BoolFlag{
			Name:     "d",
			Usage:    "debug.",
			Required: false,
		},
		cli.IntFlag{
			Name:     "q",
			Usage:    "quality of service level to use for all messages. Defaults to 0.",
			Required: false,
		},
		cli.BoolFlag{
			Name:     "c",
			Usage:    "disable 'clean session' (store subscription and pending messages when client disconnects).",
			Required: false,
		},
		cli.StringFlag{
			Name:     "cafile",
			Usage:    "path to a file containing trusted CA certificates to enable encrypted communication.",
			Required: false,
		},
		cli.StringFlag{
			Name:     "cert",
			Usage:    "client certificate for authentication, if required by server.",
			Required: false,
		},
		cli.StringFlag{
			Name:     "key",
			Usage:    "client private key for authentication, if required by server.",
			Required: false,
		},
		cli.BoolFlag{
			Name:     "insecure",
			Usage:    "do not check that the server certificate hostname matches the remote hostname.",
			Required: false,
		},
		cli.StringFlag{
			Name:     "will-payload",
			Usage:    "payload for the client Will, which is sent by the broker in case of unexpected disconnection.",
			Required: false,
		},
		cli.StringFlag{
			Name:     "will-topic",
			Usage:    "the topic on which to publish the client Will.",
			Required: false,
		},
		cli.BoolFlag{
			Name:     "will-retain",
			Usage:    "if given, make the client Will retained.",
			Required: false,
		},
		cli.StringFlag{
			Name:     "will-qos",
			Usage:    "QoS level for the client Will.",
			Required: false,
		},
	},
	Action: func(context *cli.Context) error {
		uri := context.Args().Get(0)
		i, t, d, q, c, wt, wp, wr, wq, cafile, cert, key, insecure :=
			context.String("i"),
			context.String("t"),
			context.Bool("d"),
			context.Int("q"),
			context.Bool("c"),
			context.String("will-topic"),
			context.String("will-payload"),
			context.Bool("will-retain"),
			context.Int("will-qos"),
			context.String("cafile"),
			context.String("cert"),
			context.String("key"),
			context.Bool("insecure")
		logger.SetDebug(d)
		b := mqttv1.MQTTBrokerV1{
			URI:        uri,
			CID:        i,
			WT:         wt,
			WP:         wp,
			WR:         wr,
			WQ:         byte(wq),
			C:          c,
			CACertFile: cafile,
			CertFile:   cert,
			KeyFile:    key,
			Insecure:   insecure,
			Logger:     logger,
			Debug:      d,
		}
		err := b.Connect()
		if err != nil {
			return err
		}
		defer b.Disconnect()
		s, err := b.Subscribe([]string{t}, func(event broker.Event) error {
			logger.Infof("SUBSCRIBE=> uri:%v, i:%v, t:%v, q:%v, c:%v, m:%v !", uri, i, t, q, c, string(event.Message().Body))
			return nil
		}, broker.SetSubQOS(q))
		if err != nil {
			return err
		}
		defer s.Unsubscribe()
		sig := make(chan os.Signal, 1)
		signal.Notify(sig, os.Interrupt, os.Kill)
		<-sig
		return nil
	},
}