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