Connecting a WebSocket in Angular

Question

I have WebSocket Connection in Node which works fine. Now I want to use it in Angular with a rxjs websocket, but I have no idea how to solve the connection.

const WebSocket = require('ws');

const ws = new WebSocket('wss://example.com');


ws.on('open', function open() {
  // on connection, send our authentication request
  ws.send(JSON.stringify({action: 'auth', key: apiKey, secret: apiSecret}));  
});

ws.on('close', function close() {
  console.log('disconnected');
});

ws.on('message', function incoming(data) {
  console.log(data)
  var msg = JSON.parse(data);
  if (msg.type === 'status' && msg.status === 'authenticated') {
    // if we got authentication confirmation, send subscribe event to the server
    ws.send(JSON.stringify({action: 'subscribe', buckets: ['exampleBucket']}));
  }
});

Sayooj V R · Accepted Answer · 2020-03-31 14:07:59Z

Listening for messages from the server

import { webSocket } from "rxjs/webSocket";
const subject = webSocket('wss://example.com');

subject.subscribe(
   msg => console.log('message received: ' + msg), // Called whenever there is a message from the server.
   err => console.log(err), // Called if at any point WebSocket API signals some kind of error.
   () => console.log('complete') // Called when connection is closed (for whatever reason).
 );

Pushing messages to the server

import { webSocket } from "rxjs/webSocket";
const subject = webSocket('wss://example.com');

subject.subscribe();
// Note that at least one consumer has to subscribe to the created subject - otherwise "nexted" values will be just buffered and not sent,
// since no connection was established!

subject.next({message: 'some message'});
// This will send a message to the server once a connection is made. Remember value is serialized with JSON.stringify by default!

subject.complete(); // Closes the connection.

subject.error({code: 4000, reason: 'I think our app just broke!'});
// Also closes the connection, but let's the server know that this closing is caused by some error.

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