simple tcp server with node.js

node-tcp.js

const Net = require("net");
// The port on which the server is listening.
const port = 8080;

// Use net.createServer() in your code. This is just for illustration purpose.
// Create a new TCP server.
const server = new Net.Server();
// The server listens to a socket for a client to make a connection request.
// Think of a socket as an end point.
server.listen(port, function () {
  console.log(
    `Server listening for connection requests on socket localhost:${port}`
  );
});

// When a client requests a connection with the server, the server creates a new
// socket dedicated to that client.
server.on("connection", function (socket) {
  console.log("A new connection has been established.");

  socket.write("Hello, client.");

  // The server can also receive data from the client by reading from its socket.
  socket.on("data", function (chunk) {
    console.log(`Data received from client: ${chunk.toString()}`);
  });

  // When the client requests to end the TCP connection with the server, the server
  // ends the connection.
  socket.on("end", function () {
    console.log("Closing connection with the client");
  });

  // Don't forget to catch error, for your own sake.
  socket.on("error", function (err) {
    console.log(`Error: ${err}`);
  });
});