11/12/2022 0 Comments Node fetch![]() At this point, the body is not yet available. When fetch is called, it returns a promise which will resolve to a Response object as soon as the server responds with the headers. #Node fetch fulllog( body) // prints a chock full of HTML richnessįetch has a single mandatory argument which is the resource URL. #Node fetch installThen install cheerio and node-fetch by running the following command: npm install cheerio node-fetchįor the purpose of this article, we will scrape reddit:Ĭonsole.Make sure you have a package.json, if not: cheerio helps with that, it provides a very intuitive JQuery-like API and will allows you to extract data from the HTML you received with node-fetch. While node-fetch allows us to get the HTML of any page, because the result will just be a bunch of text, you will need some tooling to extract what you need from it. To get the gig rolling, you must first install cheerio alongside node-fetch. Scraping the web with node-fetch and cheerio It's as simple as running npm install node-fetch and writing HTTP requests almost the same way you would in a browser. This means that developers no longer have to learn different APIs, their various terminologies, or how fetching actually happens behind the scenes to perform HTTP requests from the server-side. Node-fetch brings all of this to the server-side. There are a few more technical differences: i.e when a request returns with an HTTP status code 404, the promise that is returned from the fetch call doesn't get rejected. This means that developers no longer have to fear the callback hell, messy code, and the extremely verbose APIs that XHR has. The biggest and most important difference between fetch and its predecessor XHR is the fact that it's built around Promises. The browser fetch API and node-fetch are implementations of this specification. A proper understanding of promises and some experience with async/await.įetch is a specification that aims to standardize what a request, response, and everything in between, which the standard declares as fetching (hence the name fetch).Some experience with writing ES6 Javascript.To get the full benefit of this article, you should have: In this article, we will take a look at how node-fetch can be used to help you scrape the web! Prerequisites Until node-fetch came along, which aimed to provide the same fetch API that browsers support. While that is great news for frontend developers, as fetch can only be used in the browser, backend developers still had to rely on different third-party packages. This means that developers no longer have to download third-party packages just to make an HTTP request. The introduction of the Fetch API changed how Javascript developers make HTTP calls. ![]()
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