Skip to content
Related Articles

Related Articles

Node.js socket.connect() Method
  • Last Updated : 09 Aug, 2020

The socket.connect() method is an inbuilt application programming interface of class Socket within dgram module which is used to connect the particular server to a particular port and address.

Syntax:

const socket.connect(port[, address][, callback]) 

Parameters: This method accepts the following parameters:

  • port: This parameter holds the port number.
  • address: This parameter holds the server address information.
  • callback: This parameter holds the callback function for further operation.

Return Value: This method does not return any value.

Example 1: Filename: index.js



Javascript




// Node.js program to demonstrate the
// server.connect() method
  
// Importing dgram module
var dgram = require('dgram');
  
// Creating and initializing clinet
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");
  
// Catching the message event
server.on("message", function (msg) {
  
    // Displaying the client message
    process.stdout.write("UDP String: " + msg + "\n");
  
    // Exiting process
    process.exit();
})
    // Binding server with port
    .bind(1234, () => {
  
        // Getting the address information 
        // for the server by using 
        // address method
        const address = server.address()
  
        // Display the result
        console.log(address);
  
    });
  
// Connecting the server with particular local host 
// and address by using connect() method
server.connect(1234, "localhost", () => {
    console.log("connected")
})
  
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");

Output:

{ address: '0.0.0.0', family: 'IPv4', port: 1234 }
connected
UDP String: Hello

Example 2: Filename: index.js

Javascript




// Node.js program to demonstrate the
// server.connect() method
  
// Importing dgram module
var dgram = require('dgram');
  
// Creating and initializing clinet
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");
  
// Catching the message event
server.on("message", function (msg) {
  
    // Displaying the client message
    process.stdout.write("UDP String: " + msg + "\n");
  
    // Exiting process
    process.exit();
  
});
  
// Catching the listening event
server.on('listening', () => {
  
    // Getting address information for the server
    const address = server.address();
  
    // Display the result
    console.log(`server listening 
        ${address.address}:${address.port}`);
  
});
  
  
// Binding server with port address
// by using bind() method
server.bind(1234, () => {
  
    // Adding a multicast address for others to join
    server.addMembership('224.0.0.114');
  
});
  
  
// Connecting the server with particular local host 
// and address by using connect() method
server.connect(1234, "localhost", () => {
    console.log("connected")
})
  
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");

Output:

server listening 0.0.0.0:1234
connected
UDP String: Hello

Run the index.js file using the following command:

node index.js

Reference: https://nodejs.org/dist/latest-v12.x/docs/api/dgram.html#dgram_socket_connect_port_address_callback

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up
Recommended Articles
Page :