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Provide simple websocket example #21

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@mraible

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@mraible

I have a simple websocket example that I'm trying to implement with rsocket-js (since I'm connecting to a Spring WebFlux-powered websocket endpoint).

This works using plain ol' websockets:

const socket = new WebSocket('ws://localhost:8080/ws/profiles');
socket.addEventListener('message', (event: any) => {
    window.alert('message from server: ' + event.data);
});

From the current docs, I figured this is equivalent to the following.

// Create an instance of a client
const client = new RSocketClient({
  // send/receive objects instead of strings/buffers
  serializers: JsonSerializers,
  setup: {
    // ms btw sending keepalive to server
    keepAlive: 60000,
    // ms timeout if no keepalive response
    lifetime: 180000,
    // format of `data`
    dataMimeType: 'application/json',
    // format of `metadata`
    metadataMimeType: 'application/json',
  },
  transport: new RSocketWebSocketClient({url: 'ws://localhost:8080/ws/profiles'}),
});

client.connect().subscribe({
  onComplete: (socket: any) => {
    socket.requestResponse();
  },
  onError: (error: any) => console.error(error),
  onNext(payload: any) {
    console.log('onNext(%s)', payload.data);
  },
});

However, I don't get any console logs when I trigger a new websocket event.

Related: does rsocket-js support sending an authorization header in the request like socket.io-client does?

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