NODEJS HTTP CLIENT EXAMPLE INSTALL
NODEJS HTTP CLIENT EXAMPLE CODE

Node.js comes bundled with an http and an https module. In a Node.js app, you can communicate with web APIs by making HTTP requests. In this design, the different services communicate via web APIs-standard formats that allow you to programmatically send and receive data. For example, a web app that allows you to purchase a book online may involve communication between a customer orders server, a book inventory server, and a payment server. It’s common for a modern web application to communicate with other servers to accomplish a task. We love hearing your ideas!įor more on implementing JavaScript with PubNub, take a look at our React Native blog post tutorials for real-time geolocation tracking, a real-time chat app, and more! There is also a blog post about socket programming in Python.The author selected the COVID-19 Relief Fund to receive a donation as part of the Write for DOnations program. Please reach out to us at if you need assistance or have some questions about building a real-time application. I hope you were able to glean some valuable insights from this peer-to-peer, client-to-server, and server-to-client WebSocket data streaming tutorial.

NODEJS HTTP CLIENT EXAMPLE INSTALL

I made a second script with the same code, except the published message indicates that it comes from client number “2.” Be sure to install the PubNub Node.js SDK before you try executing the scripts on your command line. When we execute the above script in 2 terminal windows, we can see real-time Pub/Sub in action. Here is the documentation for the PubNub JavaScript SDK.

NODEJS HTTP CLIENT EXAMPLE CODE

Socket Server JavaScript Code // Node.js socket server scriptĬonst server = net.createServer((socket) => ) PubNub Node.js SDK If you already serve assets with something like Express.js, Hapi, or the native Node.js HTTP library, we can jump into the socket code. The code from the video, and also this article is available in my Node.js WebSocket Examples GitHub Repository.įirst we’ll go over some plain socket code, followed by WebSocket code. We can accomplish this in a single Node.js server app! You need to serve assets to your users over HTTP, but you also need to provide them with streams for bi-directional messaging. Your users can be any type of client, like a web browser, mobile app, IoT device, Node.js client, or anything that knows TCP. Let’s say you need to write a server application, and you chose Node.js as your programming language. Let’s go over some basic socket and WebSocket programming with Node.js. Similar functionality can be implemented using HTTP Long Polling or using a service like PubNub. WebSockets create a TCP socket connection between multiple devices or processes. When Should I Write WebSocket Code?īesides a real-time stock or cryptocurrency tracker app, other common real-time use cases for WebSockets are: This pattern is far superior to HTTP request-response when an application requires systems to get the latest data ASAP. WebSockets create a full-duplex connection for sending messages from client to server, or server to client at any instant. WebSocket is its own layer 7 protocol, similar to HTTP. The faster a user learns about a stock price’s change, the faster they can react, and execute a buy or sell order. Imagine an app user interface where you see real-time stock prices.

WebSockets are an excellent technology selection when you are designing your real-time app.

Nodejs http client example