How to use socket.io in RestApplication of loopback 4?

Question

I have created my rest application in Loopback 4 and now I want to implement socket in it. Is there any way to do so in RestApplication?

export class MyApplication extends BootMixin(
    ServiceMixin(RepositoryMixin(RestApplication)),
) {

    constructor(
        options: ApplicationConfig = {}
    ) {
        super(options);
    }

    ....

    async start() {
        await super.start();

        const io = socketio(this.restServer);
        io.on('connection', (socket: any) => {
            console.log('connected');
        });

    }
}

const io = socketio(this.restServer); isn't working for me

Did you find a solution to your issue? – DFord Dec 03 '19 at 21:10 — DFord, Dec 03 '19 at 21:10

score 2 · Answer 1 · answered Jul 26 '19 at 03:58

2

Here is a Official Loopback 4 example with socket.io integration. This example is created to explore how to expose Websocket (socket.io) endpoints in conjunction with LoopBack controllers.

https://github.com/raymondfeng/loopback4-example-websocket

answered Jul 26 '19 at 03:58

Manish Balodia

1,863
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4

the example you mentioned is implemented using HttpServer class, but my application using RestApplication class and restServer, so I am unable to use it in my current project. – Muhammad Ali Shahzad Jul 26 '19 at 22:07

score 1 · Answer 2 · answered Aug 16 '19 at 06:16

I have created my rest application in Loopback 4 and now I want to implement socket in it.

What is your demand? After Customer A successfully calls a REST API, and the result of this call will be sent to the specified client via websocket?

You can created both rest server and websocket server at the same time in application.ts (how to creat websocket server). Then you can create Interceptor to send message via websocket after each controller method is called.

How to use socket.io in RestApplication of loopback 4?

2 Answers2