No way to specify url using command line client?

[matthewadams]

My VerneMQ MQTT broker has a path portion of the connection url, which is similar to wss://the.server.name.here/mqtt. I'm trying to test using the command line client, but I don't see a way to specify the full url:

npx mqtt@5.5.0 publish --help
Usage: mqtt publish [opts] topic [message]

Available options:

  -h/--hostname HOST    the broker host
  -p/--port PORT        the broker port
  -i/--client-id ID     the client id
  -q/--qos 0/1/2        the QoS of the message
  -t/--topic TOPIC      the message topic
  -m/--message MSG      the message body
  -r/--retain           send a retained message
  -s/--stdin            read the message body from stdin
  -M/--multiline        read lines from stdin as multiple messages
  -u/--username USER    the username
  -P/--password PASS    the password
  -C/--protocol PROTO   the protocol to use, 'mqtt',
                        'mqtts', 'ws' or 'wss'
  --key PATH            path to the key file
  --cert PATH           path to the cert file
  --ca PATH             path to the ca certificate
  --insecure            do not verify the server certificate
  --will-topic TOPIC    the will topic
  --will-payload BODY   the will message
  --will-qos 0/1/2      the will qos
  --will-retain         send a will retained message
  -H/--help             show this

How do I specify the hostname & path?

[matthewadams]

...same for 4.3.7:

npx mqtt@4.3.7 publish --help
Usage: mqtt publish [opts] topic [message]

Available options:

  -h/--hostname HOST    the broker host
  -p/--port PORT        the broker port
  -i/--client-id ID     the client id
  -q/--qos 0/1/2        the QoS of the message
  -t/--topic TOPIC      the message topic
  -m/--message MSG      the message body
  -r/--retain           send a retained message
  -s/--stdin            read the message body from stdin
  -M/--multiline        read lines from stdin as multiple messages
  -u/--username USER    the username
  -P/--password PASS    the password
  -C/--protocol PROTO   the protocol to use, 'mqtt',
                        'mqtts', 'ws' or 'wss'
  --key PATH            path to the key file
  --cert PATH           path to the cert file
  --ca PATH             path to the ca certificate
  --insecure            do not verify the server certificate
  --will-topic TOPIC    the will topic
  --will-payload BODY   the will message
  --will-qos 0/1/2      the will qos
  --will-retain         send a will retained message
  -H/--help             show this

[robertsLando]

@matthewadams -h the.server.name.here/mqtt ?

[matthewadams]

No, it treats the string the.server.name.here/mqtt as the entire hostname and fails DNS lookup. Error is

# Note: I've changed the actual hostname with "the.server.name.here" below

$ DEBUG=mqttjs* npx mqtt@4.3.7 publish -C wss -h the.server.name.here/mqtt -p 443 -i matthew_mqttjs_cli -t foo -u admin -P password  -m "hello from mqttjs-cli @ $(date)"

  mqttjs connecting to an MQTT broker... +0ms
  mqttjs:client MqttClient :: options.protocol wss +0ms
  mqttjs:client MqttClient :: options.protocolVersion 4 +0ms
  mqttjs:client MqttClient :: options.username admin +0ms
  mqttjs:client MqttClient :: options.keepalive 60 +0ms
  mqttjs:client MqttClient :: options.reconnectPeriod 1000 +0ms
  mqttjs:client MqttClient :: options.rejectUnauthorized undefined +0ms
  mqttjs:client MqttClient :: options.topicAliasMaximum undefined +0ms
  mqttjs:client MqttClient :: clientId matthew_mqttjs_cli +0ms
  mqttjs:client MqttClient :: setting up stream +0ms
  mqttjs:client _setupStream :: calling method to clear reconnect +1ms
  mqttjs:client _clearReconnect : clearing reconnect timer +0ms
  mqttjs:client _setupStream :: using streamBuilder provided to client to create stream +0ms
  mqttjs calling streambuilder for wss +2ms
  mqttjs:ws streamBuilder +0ms
  mqttjs:ws createWebSocket +0ms
  mqttjs:ws protocol: MQTT 4 +0ms
  mqttjs:ws creating new Websocket for url: wss://the.server.name.here/mqtt:443/ and protocol: mqtt +0ms
  mqttjs:client _setupStream :: pipe stream to writable stream +20ms
  mqttjs:client _setupStream: sending packet `connect` +2ms
  mqttjs:client sendPacket :: packet: { cmd: 'connect' } +0ms
  mqttjs:client sendPacket :: emitting `packetsend` +1ms
  mqttjs:client sendPacket :: writing to stream +0ms
  mqttjs:client sendPacket :: writeToStream result true +9ms
  mqttjs:client streamErrorHandler :: error Unexpected server response: 404 +461ms
  mqttjs:client nop :: Error: Unexpected server response: 404
    at ClientRequest.<anonymous> (/Users/matthewadams/.asdf/installs/nodejs/20.9.0/.npm/lib/node_modules/mqtt/node_modules/ws/lib/websocket.js:783:7)
    at ClientRequest.emit (node:events:514:28)
    at HTTPParser.parserOnIncomingClient [as onIncoming] (node:_http_client:693:27)
    at HTTPParser.parserOnHeadersComplete (node:_http_common:119:17)
    at TLSSocket.socketOnData (node:_http_client:535:22)
    at TLSSocket.emit (node:events:514:28)
    at addChunk (node:internal/streams/readable:376:12)
    at readableAddChunk (node:internal/streams/readable:349:9)
    at Readable.push (node:internal/streams/readable:286:10)
    at TLSWrap.onStreamRead (node:internal/stream_base_commons:190:23) +0ms
  mqttjs:client (matthew_mqttjs_cli)stream :: on close +1ms
  mqttjs:client flushVolatile :: deleting volatile messages from the queue and setting their callbacks as error function +0ms
  mqttjs:client stream: emit close to MqttClient +0ms
  mqttjs:client close :: connected set to `false` +0ms
  mqttjs:client close :: clearing connackTimer +0ms
  mqttjs:client close :: clearing ping timer +0ms
  mqttjs:client close :: calling _setupReconnect +0ms
  mqttjs:client _setupReconnect :: emit `offline` state +0ms
  mqttjs:client _setupReconnect :: set `reconnecting` to `true` +0ms
  mqttjs:client _setupReconnect :: setting reconnectTimer for 1000 ms +0ms
  mqttjs:client reconnectTimer :: reconnect triggered! +1s
  mqttjs:client _reconnect: emitting reconnect to client +1ms
  mqttjs:client _reconnect: calling _setupStream +0ms
  mqttjs:client _setupStream :: calling method to clear reconnect +0ms
  mqttjs:client _clearReconnect : clearing reconnect timer +0ms
  mqttjs:client _setupStream :: using streamBuilder provided to client to create stream +1ms
  mqttjs calling streambuilder for wss +1s
  mqttjs:ws streamBuilder +1s
  mqttjs:ws createWebSocket +0ms
  mqttjs:ws protocol: MQTT 4 +0ms
  mqttjs:ws creating new Websocket for url: wss://the.server.name.here/mqtt:443/ and protocol: mqtt +0ms
  mqttjs:client _setupStream :: pipe stream to writable stream +4ms
  mqttjs:client _setupStream: sending packet `connect` +0ms
  mqttjs:client sendPacket :: packet: { cmd: 'connect' } +0ms
  mqttjs:client sendPacket :: emitting `packetsend` +0ms
  mqttjs:client sendPacket :: writing to stream +0ms
  mqttjs:client sendPacket :: writeToStream result true +0ms
  mqttjs:client streamErrorHandler :: error Unexpected server response: 404 +351ms
  mqttjs:client nop :: Error: Unexpected server response: 404
    at ClientRequest.<anonymous> (/Users/matthewadams/.asdf/installs/nodejs/20.9.0/.npm/lib/node_modules/mqtt/node_modules/ws/lib/websocket.js:783:7)
    at ClientRequest.emit (node:events:514:28)
    at HTTPParser.parserOnIncomingClient [as onIncoming] (node:_http_client:693:27)
    at HTTPParser.parserOnHeadersComplete (node:_http_common:119:17)
    at TLSSocket.socketOnData (node:_http_client:535:22)
    at TLSSocket.emit (node:events:514:28)
    at addChunk (node:internal/streams/readable:376:12)
    at readableAddChunk (node:internal/streams/readable:349:9)
    at Readable.push (node:internal/streams/readable:286:10)
    at TLSWrap.onStreamRead (node:internal/stream_base_commons:190:23) +1ms
  mqttjs:client (matthew_mqttjs_cli)stream :: on close +0ms
  mqttjs:client flushVolatile :: deleting volatile messages from the queue and setting their callbacks as error function +0ms
  mqttjs:client stream: emit close to MqttClient +0ms
  mqttjs:client close :: connected set to `false` +0ms
  mqttjs:client close :: clearing connackTimer +0ms
  mqttjs:client close :: clearing ping timer +0ms
  mqttjs:client close :: calling _setupReconnect +0ms
  mqttjs:client _setupReconnect :: setting reconnectTimer for 1000 ms +1ms
  mqttjs:client reconnectTimer :: reconnect triggered! +1s
  mqttjs:client _reconnect: emitting reconnect to cli

Notice the line:

mqttjs:ws creating new Websocket for url: wss://the.server.name.here/mqtt:443/ and protocol: mqtt +0ms

The port follows /mqtt. The strange thing is that the error is reported as a 404, when it should really be a DNS failure.

[robertsLando]

Want to submit a PR? The cli bin are not a priority for me right now as there are many alternatives like mosquitto pub for example

[matthewadams]

I will if I find the time.