hexo-util
Version:
Utilities for Hexo.
51 lines • 1.89 kB
JavaScript
;
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
const url_1 = require("url");
const cache_1 = __importDefault(require("./cache"));
const cache = new cache_1.default();
/**
* Check whether the link is external
* @param {String} input The url to check
* @param {String} input The hostname / url of website
* @param {Array} input Exclude hostnames. Specific subdomain is required when applicable, including www.
* @returns {Boolean} True if the link doesn't have protocol or link has same host with config.url
*/
function isExternalLink(input, sitehost, exclude) {
return cache.apply(`${input}-${sitehost}-${exclude}`, () => {
// Return false early for internal link
if (!/^(\/\/|http(s)?:)/.test(input))
return false;
sitehost = (0, url_1.parse)(sitehost).hostname || sitehost;
if (!sitehost)
return false;
// handle relative url and invalid url
let data;
try {
data = new URL(input, `http://${sitehost}`);
}
catch (e) { }
// if input is invalid url, data should be undefined
if (typeof data !== 'object')
return false;
// handle mailto: javascript: vbscript: and so on
if (data.origin === 'null')
return false;
const host = data.hostname;
if (exclude) {
exclude = Array.isArray(exclude) ? exclude : [exclude];
if (exclude && exclude.length) {
for (const i of exclude) {
if (host === i)
return false;
}
}
}
if (host !== sitehost)
return true;
return false;
});
}
module.exports = isExternalLink;
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