If you are curious, you can get more in-depth knowledge of event emitters by reading our Using Event Emitters in Node.js guide. The way in which you respond to data coming from a stream is the same as the way in which you respond to data from events. In Node.js, streams are instances of event emitters. The methods used to send HTTP requests have a Stream-based API. HTTP CLIENT NODEJS HOW TOTo install Node.js on macOS or Ubuntu 18.04, follow the steps in How To Install Node.js and Create a Local Development Environment on macOS or the Installing Using a PPA section of How To Install Node.js on Ubuntu 18.04. This tutorial uses Node.js version 10.19.0. Once installed, you will be able to access the https module that’s used throughout the tutorial. This tutorial requires that you have Node.js installed. Finally, you will make POST, PUT, and DELETE requests so that you can modify data in an external server. You will then look at ways to customize your request, such as by adding headers. You will begin by making a GET request, the standard HTTP request to receive data. In this tutorial, you will use the https module to make HTTP requests to JSON Placeholder, a fake REST API for testing purposes. As it’s a core module, you do not need to install any libraries to use it. This key functionality equips Node.js programmers to create modern, API-driven web applications with Node.js. They can also make HTTP requests to other servers. These modules have functions to create an HTTP server so that a Node.js program can respond to HTTP requests. 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. The author selected the COVID-19 Relief Fund to receive a donation as part of the Write for DOnations program.
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