Socket.io 与 Adonis.js

Question

I am using Adonis 4.1.0 and Adonis-websocket is only been available for v3 . Can anyone tell me workaround for using socket.io with Adonis 4.1.0?

Answer 1

apparently they have been working on this not long ago, it was based on socket.io but because of some issues like memory leaks and others, they decided to use websockets directly instead, check these discussions:
https://github.com/adonisjs/discussion/issues/51
https://forum.adonisjs.com/t/integrating-socket-io-with-adonis-4/519

have you tried using socket.io without relying on Adonis ? , something like:

var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);

app.get('/', function(req, res){
  res.sendFile(__dirname + '/index.html');
});

io.on('connection', function(socket){
  console.log('a user connected');
});

http.listen(3000, function(){
  console.log('listening on *:3000');
});

But you should be able to do this with Adonis by now according to: https://github.com/adonisjs/adonis-websocket-protocol

Example:

const filereader = require('simple-filereader')
const msgpack = require('msgpack-lite')
const packets = require('@adonisjs/websocket-packets')

const client = new WebSocket('ws://localhost:3000/adonis-ws')

client.onopen = function () {
  // TCP connection created
}

client.onerror = function () {
  // TCP connection error
}

client.onmessage = function (message) {
  filereader(message, function (error, payload) {
    const packet = msgpack.decode(payload)
    handlePacket(packet)
  })
}

function handlePacket (packet) {
  if (packets.isOpenPacket(packet)) {
    console.log('Server ack connection. Make channel subscriptions now')
  }

  if (packets.isJoinAck(packet)) {
    console.log('subscription created for %s', packet.d.topic)
  }
}

check this for broadcast examples using WS : https://github.com/websockets/ws#broadcast-example

Answer 2

Create start/socket.js file and paste following code inside it.

const Server = use('Server')
const io = use('socket.io')(Server.getInstance())

io.on('connection', function (socket) {
console.log(socket.id)
})

From Virk Himself in this forum: https://forum.adonisjs.com/t/integrating-socket-io-with-adonis-4/519

Answer 3

create a standalone socket io configuration file in start/socket.js

const io = require('socket.io')();
io.listen(3000);
io.on('connection', function (socket) {
  console.log(socket.id)
})

to start your socket io server you can configure your server.js as below

new Ignitor(require('@adonisjs/fold'))
  .appRoot(__dirname)
  .preLoad('start/socket') //path of socket.js
  .fireHttpServer()
  .catch(console.error)

now when you start your server then it will start along with socket io