使用纯 JavaScript 通过 Websocket 连接到 MQTT 代理

Question

I have been using the native JS websocket object to build apps that use WS to communicate with the server. I have set up a Mosquitto MQTT broker and have enabled ws connections on the server.

I'm not a big fan of importing third-party libraries if it can be avoided but can't seem to find any examples of how to connect just using the native JS websocket object.

Does this mean it's not possible?

Answer 1

It's perfectly possible, but you will just end up totally re-implementing the whole MQTT protocol ( spec ). MQTT over Websockets is just the raw TCP protocol tunnelled over a websocket connection.

Just use the Paho Javascript client and save yourself a lot of effort and testing.