Problem Not Working Connection with Nodejs or Browser

[sergioxdev]

I post the code that I am creating,
starting it from the shell with the command: node script.js

result:
lost connection! undefined
connection closed! undefined

'use strict'
var mqtt = require('mqtt')
var url = require('url')
var path = require('path')
var fs = require('fs')
var TRUSTED_CA_LIST = fs.readFileSync(path.join(__dirname, '/ca.cer'))
var endpoint = 'wss://server:port/mqtt'
var parsed = url.parse(endpoint)
var mqttOptions = {
	keepalive: 60,
	reschedulePings: true,
	protocolId: 'MQTT',
	protocolVersion: 5,
	reconnectPeriod: 1000,
	connectTimeout: 10 * 1000,
	clean: true,
	protocol: 'wss',
	clientId: 'example',
	username: 'example',
	password: 'example',
  	ca: TRUSTED_CA_LIST,
  	rejectUnauthorized: true,
	will: {
		topic: 'WillMsg',
		payload: 'Connection Closed abnormally..!',
		qos: 0,
		retain: false
	},
	debug: true,
}
var client = mqtt.connect(parsed, mqttOptions)
client.subscribe('example')

client.on('connect', function () {
  console.log('connected')
})
client.on('error', function (a) {
  console.log('error! ' + a)
})
client.on('offline', function (a) {
  console.log('lost connection! ' + a)
})
client.on('close', function (a) {
  console.log('connection closed! ' + a)
})
client.on('message', function (topic, message) {
  console.log(message.toString())
})

---

same code, starting it from firefox: inserted in a web page

result: it works

html
head
<script src="https://unpkg.com/mqtt/dist/mqtt.min.js"></script> 

script
var TRUSTED_CA_LIST = 'example'

var endpoint = 'wss://server:port/mqtt'

var mqttOptions = {
	keepalive: 60,
	reschedulePings: true,
	protocolId: 'MQTT',
	protocolVersion: 5,
	reconnectPeriod: 1000,
	connectTimeout: 10 * 1000,
	clean: true,
	protocol: 'wss',
	clientId: 'example',
	username: 'example',
	password: 'example',
  	ca: TRUSTED_CA_LIST,
  	rejectUnauthorized: true,
	will: {
		topic: 'WillMsg',
		payload: 'Connection Closed abnormally..!',
		qos: 0,
		retain: false
	},
	debug: true,
}

var client = mqtt.connect(endpoint, mqttOptions)
client.subscribe('example')

client.on('connect', function () {
  console.log('connected')
})

client.on('error', function (a) {
  console.log('error! ' + a)
})

client.on('offline', function (a) {
  console.log('lost connection! ' + a)
})

client.on('close', function (a) {
  console.log('connection closed! ' + a)
})

client.on('message', function (topic, message) {
  console.log(message.toString())
})

/script
/head
body
/body
/html

something wrong, suggestions are welcome

[sergioxdev]

updates I kept testing:
premise:

• certicates signed by CA authority are used
• I have tested the services on the different ports with other clients and the brocker works fine

nodejs:

• mqtt > OK
• mqtts > OK
• ws > OK
• WSS > NO - (lost connection! undefined - connection closed! undefined)

firefox:

• mqtt > NO - (error Javascript on -> createConnection(r))
• mqtts > NO - (error Javascript on -> createConnection(r))
• ws > NO - (lost connection! undefined - connection closed! undefined)
• WSS > OK

[YoDaMa]

@sergioxdev so I understand correctly, you are saying that with your snippet of code using WSS, it does not work in NodeJS but it does work when running the code in a Browser environment?

[sergioxdev]

@sergioxdev so I understand correctly, you are saying that with your snippet of code using WSS, it does not work in NodeJS but it does work when running the code in a Browser environment?

@YoDaMa Yes, right

[robertsLando]

MQTT 5.0.0 BETA is now available! Try it out and give us feedback: npm i mqtt@beta. It may fix your issues

[robertsLando]

Feel free to reopen this issue if it happens also with v5