Haketilo

/**

 * Myext smuggling policy to content script through url

 *

 * Copyright (C) 2021 Wojtek Kosior

 *

 * This code is dual-licensed under:

 * - Asshole license 1.0,

 * - GPLv3 or (at your option) any later version

 *

 * "dual-licensed" means you can choose the license you prefer.

 *

 * This code is released under a permissive license because I disapprove of

 * copyright and wouldn't be willing to sue a violator. Despite not putting

 * this code under copyleft (which is also kind of copyright), I do not want

 * it to be made proprietary. Hence, the permissive alternative to GPL is the

 * Asshole license 1.0 that allows me to call you an asshole if you use it.

 * This means you're legally ok regardless of how you utilize this code but if

 * you make it into something nonfree, you're an asshole.

 *

 * You should have received a copy of both GPLv3 and Asshole license 1.0

 * together with this code. If not, please see:

 * - https://www.gnu.org/licenses/gpl-3.0.en.html

 * - https://koszko.org/asshole-license.txt

 */

"use strict";

(() => {

    const TYPE_PREFIX = window.TYPE_PREFIX;

    const get_storage = window.get_storage;

    const browser = window.browser;

    const url_item = window.url_item;

    const gen_unique = window.gen_unique;

    const get_query_best = window.get_query_best;

    var storage;

    var query_best;

    function redirect(request)

    {

	let url_re = /^([^#]*)((#[^#]*)(#.*)?)?$/;

	let match = url_re.exec(request.url);

	let base_url = match[1];

	let first_target = match[3];

	let second_target = match[4];

	let url = url_item(request.url);

	let unique = gen_unique(url);

	if (first_target === unique) {

	    console.log(["not redirecting"]);

	    return {cancel : false};

	}

	let [pattern, settings] = query_best(url);

	if (settings === undefined || !settings.allow)

	    return {cancel : false};

	second_target = (first_target || "") + (second_target || "");

	console.log(["redirecting", request.url,

		     (base_url + unique + second_target)]);

	return {

	    redirectUrl : (base_url + unique + second_target)

	};

    }

    async function start() {

	storage = await get_storage();

	query_best = await get_query_best();

	chrome.webRequest.onBeforeRequest.addListener(

	    redirect,

	    {

		urls: ["<all_urls>"],

		types: ["main_frame", "sub_frame"]

	    },

	    ["blocking"]

	);

    }

    window.start_policy_smuggler = start;

})();