Handling Websockets with Express

Handling Websockets with Express

Handling Websockets with Express – onlinecode

In this post, we will give you information about Handling Websockets with Express – onlinecode. Here we will give you detail about Handling Websockets with Express – onlinecode And how to use it also give you a demo for it if it is necessary.

The ws npm module is the de facto library for websockets in Node.js. It has built-in support for Node.js’ native http servers. But, unfortunately, very few developers use Node’s built-in HTTP package directly, they usually use Express.

Integrating the ws package with Express is easy. There is also an express-ws module on npm, but I’ve never managed to get that module to work. Here’s how you can use the ws package to listen to websockets on an Express server.

Listening to Websockets with Express

The ws package supports native Node.js HTTP servers. Conveniently, Express’ listen() function returns a native Node.js HTTP server. So you can use the same process described in the ws docs:

const express = require('express');
const ws = require('ws');

const app = express();

// Set up a headless websocket server that prints any
// events that come in.
const wsServer = new ws.Server({ noServer: true });
wsServer.on('connection', socket => {
  socket.on('message', message => console.log(message));

// 'server' is a vanilla Node.js HTTP server, so use
// the same ws upgrade process described here:
// https://www.npmjs.com/package/ws#multiple-servers-sharing-a-single-https-server
const server = app.listen(3000);
server.on('upgrade', (request, socket, head) => {
  wsServer.handleUpgrade(request, socket, head, socket => {
    wsServer.emit('connection', socket, request);

Testing for Handling Websockets with Express

How do you actually connect to this server? ws also has a websocket client implementation as well as the server implementation.

const ws = require('ws');

const client = new ws('ws://localhost:3000');

client.on('open', () => {
  // Causes the server to print "Hello"

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I need more information on what you are looking for. Here are a few options for what you might mean by ‘express’:

  • Express train: A train that makes fewer stops than a regular train, and therefore travels faster.
  • Express delivery: A service that delivers packages quickly, usually within 24 hours.
  • Express yourself: To communicate your thoughts and feelings in a clear and direct way.
  • Express lane: A lane on a highway that is reserved for cars that are traveling faster than the other lanes.
  • Expresso: A strong, concentrated coffee.

Please let me know if any of these are what you were looking for. If not, please provide more information so I can better assist you.

Here are some examples of how to use the word ‘express’ in a sentence:

  • I took the express train to work today.
  • I ordered the package to be delivered express.
  • She expressed her anger by slamming the door.
  • The express lane was moving much faster than the other lanes.
  • I love the strong taste of espresso.

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