canonical blogger TLD for UserScript

blogger-canonical.user.js

// ==UserScript==
// @name        blogger canonical
// @namespace   http://noromanba.flavors.me
// @description canonical blogger TLD for UserScript
// @include     *://*.blogspot.tld/*
// @grant       none
// @noframes
// @run-at      document-start
// @version     2016.04.14.0
// @homepage    https://gist.github.com/noromanba/5d8a97bc1f3815c38b19e92ae13d7939
// @downloadURL https://gist.github.com/noromanba/5d8a97bc1f3815c38b19e92ae13d7939/raw/blogger-canonical.user.js
// @license     MIT License http://nrm.mit-license.org/2016
// @author      noromanba   http://noromanba.flavors.me
// @icon        https://upload.wikimedia.org/wikipedia/commons/thumb/3/32/New_Zealand_Permanent_Warning_-_Merging_Traffic_Left_and_Right.svg/32px-New_Zealand_Permanent_Warning_-_Merging_Traffic_Left_and_Right.svg.png
// @icon64      https://upload.wikimedia.org/wikipedia/commons/thumb/3/32/New_Zealand_Permanent_Warning_-_Merging_Traffic_Left_and_Right.svg/64px-New_Zealand_Permanent_Warning_-_Merging_Traffic_Left_and_Right.svg.png
// ==/UserScript==

// Icon (PD by New Zealand Transport Agency)
// https://commons.wikimedia.org/wiki/File%3ANew_Zealand_Permanent_Warning_-_Merging_Traffic_Left_and_Right.svg

// Devel
// https://gist.github.com/noromanba/5d8a97bc1f3815c38b19e92ae13d7939


// c.f.
// https://support.google.com/blogger/answer/2402711
(() => {
    // /\.blogspot\.com$/ w/ @include *://*.blogspot.tld/* invoke redirect loop; e.g.
    // http://b.hatena.ne.jp/entry/googlechromereleases.blogspot.com/
    const [
        blogger, tld
    ] = location.hostname.match(/\.blogspot(\.[\a-z]{2,3}(?:\.[\a-z]{2})*)$/) || '';
    if (!blogger || tld === '.com') return;

    // NCR: No Country Redirect
    // access to below address, so set HTTP only cookie "NCR=1"
    // http://<BLOGNAME>.blogspot.com/ncr/[<PATH>]
    const canon = new URL(location.href);
    canon.hostname = location.hostname.split('.').slice(0, 2).join('.') + '.com';
    canon.pathname = '/ncr' + location.pathname;

    location.href = canon.href;
})();

// NOTE
// location assertion; RegExp w/ Magic TLD within @include and @match
//
//  Greasemonkey is a de facto standard; c.f.
//   http://wiki.greasespot.net/Include_and_exclude_rules#Regular_Expressions
//   http://wiki.greasespot.net/Include_and_exclude_rules#Magic_TLD
//    http://wiki.greasespot.net/Magic_TLD
//   http://wiki.greasespot.net/Metadata_Block#.40match
//    https://developer.chrome.com/extensions/match_patterns
//
//  Tampermonkey doesn't work Magic TLD w/ @match and @include; e.g.
//      @match       *://*.blogspot.tld/*
//      @include     /^https?:\/\/[\w\-]+\.blogspot.tld\/.*/
//      @include     /^https?://[\w+\-]\.blogspot.tld\/.*/