index.js

thoward37@gmail.com/push-test3-1791933214491 / index.js @ fe5b370d Download

Ladder Summary

file The module exports a single **default async function `isUp(url)`** that checks whether a given website is reachable. It extracts the hostname from the provided URL, queries the `https://isitup.org/<hostname>.json` API via `got`, throws an error if the API reports an invalid domain, and otherwise returns `true` when the site’s status code indicates it is up (and `false` when it is down).

import got from 'got';

const statusCodes = {
	isUp: 1,
	isDown: 2,
	invalidDomain: 3,
};

export default async function isUp(url) {
	const hostname = encodeURIComponent((new URL(url)).hostname);

	const {status_code: statusCode} = await got(`https://isitup.org/${hostname}.json`, {
		headers: {
			'user-agent': 'https://github.com/sindresorhus/is-up',
		},
	}).json();

	if (statusCode === statusCodes.invalidDomain) {
		throw new Error('Invalid domain');
	}

	return statusCode === statusCodes.isUp;
}