63 lines
1.6 KiB
JavaScript
63 lines
1.6 KiB
JavaScript
'use strict';
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// Public modules from npm
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const isUrl = require("is-url-superb");
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const ky = require("ky-universal").create({
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throwHttpErrors: false
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});
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// Modules from file
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const {
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F95_BASE_URL
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} = require('./constants/urls.js');
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/**
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* @protected
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* Check if the url belongs to the domain of the F95 platform.
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* @param {String} url URL to check
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* @returns {Boolean} true if the url belongs to the domain, false otherwise
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*/
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module.exports.isF95URL = function(url) {
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if (url.toString().startsWith(F95_BASE_URL)) return true;
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else return false;
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}
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/**
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* @protected
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* Checks if the string passed by parameter has a properly formatted and valid path to a URL.
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* @param {String} url String to check for correctness
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* @returns {Boolean} true if the string is a valid URL, false otherwise
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*/
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module.exports.isStringAValidURL = function(url) {
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try {
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new URL(url);
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return true;
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} catch (err) {
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return false;
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}
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}
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/**
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* @public
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* Check if a particular URL is valid and reachable on the web.
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* @param {String} url URL to check
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* @param {Boolean} checkRedirect If true, the function will consider redirects a violation and return false
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* @returns {Promise<Boolean>} true if the URL exists, false otherwise
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*/
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module.exports.urlExists = async function(url, checkRedirect) {
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if (!isUrl(url)) {
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return false
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}
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const response = await ky.head(url);
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let valid = response !== undefined && !/4\d\d/.test(response.status);
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if(!valid) return false;
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if(checkRedirect) {
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if (response.url === url) valid = true;
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else valid = false;
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}
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return valid;
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} |