Node.js Net

Node.js Net Module: TCP Sockets

Node.js comes with powerful networking via the built-in net module. Using TCP sockets, you can build chat systems, messaging platforms, or any app needing two-way communication between clients and servers.

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Server Code

// net_server.js
const net = require('net');

const server = net.createServer((socket) => {
  socket.end('goodbye
');
}).on('error', (err) => {
  throw err;
});

server.listen(50302, () => {
  console.log('Server listening on port', 50302);
});

Client Code

// net_client.js
const net = require('net');

const client = net.connect({ port: 50302 }, () => {
  console.log('Connected to server!');
  client.write('world!
');
});

client.on('data', (data) => {
  console.log(data.toString());
  client.end();
});

client.on('end', () => {
  console.log('Disconnected from server');
});

Run It

# Terminal 1
node net_server.js

# Terminal 2
node net_client.js

Important Notes

• Both server and client must use the same port.
• Handle error, data, end, and close events for robustness.
• For HTTP, use the http module instead ÔÇö net is for raw TCP.

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Conclusion

The Node.js net module is your gateway to TCP socket programming. With just a few lines you can build real-time messaging and custom protocols. For more guides, stay tuned to .

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