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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
const { XPCOMUtils } = ChromeUtils.importESModule(
"resource://gre/modules/XPCOMUtils.sys.mjs"
);
const lazy = {};
XPCOMUtils.defineLazyServiceGetter(
lazy,
"IDNService",
"@mozilla.org/network/idn-service;1",
"nsIIDNService"
);
/**
* Properly convert internationalized domain names.
* @param {string} host Domain hostname.
* @returns {string} Hostname suitable to be displayed.
*/
function handleIDNHost(hostname) {
try {
return lazy.IDNService.convertToDisplayIDN(hostname, {});
} catch (e) {
// If something goes wrong (e.g. host is an IP address) just fail back
// to the full domain.
return hostname;
}
}
/**
* Get the effective top level domain of a host.
* @param {string} host The host to be analyzed.
* @return {str} The suffix or empty string if there's no suffix.
*/
function getETLD(host) {
try {
return Services.eTLD.getPublicSuffixFromHost(host);
} catch (err) {
return "";
}
}
/**
* shortURL - Creates a short version of a link's url, used for display purposes
* e.g. {url: http://www.foosite.com} => "foosite"
*
* @param {obj} link A link object
* {str} link.url (required)- The url of the link
* @return {str} A short url
*/
function shortURL({ url }) {
if (!url) {
return "";
}
// Make sure we have a valid / parseable url
let parsed;
try {
parsed = new URL(url);
} catch (ex) {
// Not entirely sure what we have, but just give it back
return url;
}
// Clean up the url (lowercase hostname via URL and remove www.)
const hostname = parsed.hostname.replace(/^www\./i, "");
// Remove the eTLD (e.g., com, net) and the preceding period from the hostname
const eTLD = getETLD(hostname);
const eTLDExtra = eTLD.length ? -(eTLD.length + 1) : Infinity;
// Ideally get the short eTLD-less host but fall back to longer url parts
return (
handleIDNHost(hostname.slice(0, eTLDExtra) || hostname) ||
parsed.pathname ||
parsed.href
);
}
const EXPORTED_SYMBOLS = ["shortURL", "getETLD"];
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