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nodejs websocket with ws and http - full minimal example
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| // starter was this very helpful post from @lpinca | |
| // https://github.com/websockets/ws/issues/2052#issuecomment-1142529734 | |
| // installation: npm install ws | |
| const WebSocketServer = require("ws"); | |
| const http = require('http'); | |
| const PORT = process.env.PORT || 8084; | |
| const data = `<!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| </head> | |
| <body> | |
| <script> | |
| (function () { | |
| var ws = new WebSocket('ws://localhost:8084'); | |
| ws.onopen = function () { | |
| console.log('open'); | |
| setInterval(() => { | |
| ws.send('message from client'); | |
| }, 2000) | |
| }; | |
| ws.onmessage = function (msg) { | |
| console.log('client received', msg.data); | |
| }; | |
| })(); | |
| </script> | |
| </body> | |
| </html>`; | |
| const server = http.createServer((req, res) => { | |
| if (req.method === 'GET') { | |
| res.setHeader('Content-Type', 'text/html'); | |
| res.end(data); | |
| } | |
| }) | |
| const wss = new WebSocketServer.Server({ server }); | |
| wss.on('connection', function (ws) { | |
| console.log('connected'); | |
| ws.on('error', console.error); | |
| ws.on('message', function message(data) { | |
| console.log('server received: %s', data); | |
| }); | |
| setInterval(() => { | |
| ws.send('message from server'); | |
| }, 1000); | |
| }); | |
| server.listen(PORT, () => { | |
| console.log(`Server is running on port ${PORT}`); | |
| }); | |
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