| 1 | import { ClusterWorker } from 'poolifier' |
| 2 | import { type RawData, WebSocketServer } from 'ws' |
| 3 | import { |
| 4 | type DataPayload, |
| 5 | type MessagePayload, |
| 6 | MessageType, |
| 7 | type WorkerData, |
| 8 | type WorkerResponse |
| 9 | } from './types.js' |
| 10 | |
| 11 | const factorial: (n: number) => number = n => { |
| 12 | if (n === 0) { |
| 13 | return 1 |
| 14 | } |
| 15 | return factorial(n - 1) * n |
| 16 | } |
| 17 | |
| 18 | const startWebSocketServer = (workerData?: WorkerData): WorkerResponse => { |
| 19 | const { port } = workerData as WorkerData |
| 20 | const wss = new WebSocketServer({ port }, () => { |
| 21 | console.info( |
| 22 | `⚡️[ws server]: WebSocket server is started in cluster worker at ws://localhost:${port}/` |
| 23 | ) |
| 24 | }) |
| 25 | |
| 26 | wss.on('connection', ws => { |
| 27 | ws.on('error', console.error) |
| 28 | ws.on('message', (message: RawData) => { |
| 29 | const { type, data } = JSON.parse( |
| 30 | // eslint-disable-next-line @typescript-eslint/no-base-to-string |
| 31 | message.toString() |
| 32 | ) as MessagePayload<DataPayload> |
| 33 | switch (type) { |
| 34 | case MessageType.echo: |
| 35 | ws.send( |
| 36 | JSON.stringify({ |
| 37 | type: MessageType.echo, |
| 38 | data |
| 39 | }) |
| 40 | ) |
| 41 | break |
| 42 | case MessageType.factorial: |
| 43 | ws.send( |
| 44 | JSON.stringify({ |
| 45 | type: MessageType.factorial, |
| 46 | data: { number: factorial(data.number as number) } |
| 47 | }) |
| 48 | ) |
| 49 | break |
| 50 | } |
| 51 | }) |
| 52 | }) |
| 53 | return { |
| 54 | status: true, |
| 55 | port: wss.options.port |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | class WebSocketServerWorker extends ClusterWorker<WorkerData, WorkerResponse> { |
| 60 | public constructor () { |
| 61 | super(startWebSocketServer) |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | export const webSocketServerWorker = new WebSocketServerWorker() |