A Tampermonkey script to watch Disney+ on Linux

disneyplus-on-linux.js

// ==UserScript==
// @name         DisneyPlus on Ubuntu
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Set custom navigator.userAgent
// @author       Andrea Ganduglia - Based on https://gist.github.com/moehlone/bed7dd6cb38fc55bd640
// @match        https://www.disneyplus.com/*
// @grant        none
// ==/UserScript==



(function() {
    'use strict';
    var customUserAgent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:97.0) Gecko/20100101 Firefox/97.0';

    /**
     * Creates a read/writable property which returns a function set for write/set (assignment)
     * and read/get access on a variable
     *
     * @param {Any} value initial value of the property
     */
    function createProperty(value) {
        var _value = value;

        /**
         * Overwrite getter.
         *
         * @returns {Any} The Value.
         * @private
         */
        function _get() {
            return _value;
        }

        /**
         * Overwrite setter.
         *
         * @param {Any} v   Sets the value.
         * @private
         */
        function _set(v) {
            _value = v;
        }

        return {
            "get": _get,
            "set": _set
        };
    };

    /**
     * Creates or replaces a read-write-property in a given scope object, especially for non-writable properties.
     * This also works for built-in host objects (non-DOM objects), e.g. navigator.
     * Optional an initial value can be passed, otherwise the current value of the object-property will be set.
     *
     * @param {Object} objBase  e.g. window
     * @param {String} objScopeName    e.g. "navigator"
     * @param {String} propName    e.g. "userAgent"
     * @param {Any} initValue (optional)   e.g. window.navigator.userAgent
     */
    function makePropertyWritable(objBase, objScopeName, propName, initValue) {
        var newProp,
            initObj;

        if (objBase && objScopeName in objBase && propName in objBase[objScopeName]) {
            if(typeof initValue === "undefined") {
                initValue = objBase[objScopeName][propName];
            }

            newProp = createProperty(initValue);

            try {
                Object.defineProperty(objBase[objScopeName], propName, newProp);
            } catch (e) {
                initObj = {};
                initObj[propName] = newProp;
                try {
                    objBase[objScopeName] = Object.create(objBase[objScopeName], initObj);
                } catch(e) {
                    // Workaround, but necessary to overwrite native host objects
                }
            }
        }
    };

    makePropertyWritable(window, "navigator", "userAgent");
    window.navigator.userAgent = customUserAgent;
    console.log(window.navigator.userAgent);
})();