youku-fix-cna.user.js

// ==UserScript==
// @name         Youku Fix Cna
// @namespace    myfreeer
// @version      0.1
// @description  为Youku提供cna cookie
// @author       myfreeer
// @match        http://v.youku.com/*
// @match        https://v.youku.com/*
// @license      MIT
// @run-at       document-start
// @grant        GM_xmlhttpRequest
// ==/UserScript==

(function () {
    'use strict';

    const cnaFake = (cna = '') => {
        // this provides a fake cna
        const BAES64_TABLE = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
        while (cna.length < 24) cna += BAES64_TABLE[(Math.random() * 64) | 0];
        let cookieDate = new Date();
        cookieDate.setTime(cookieDate.getTime() + 864000000000); // 1e4 *  24 * 60 * 60 * 1000
        let expires = '; expires=' + cookieDate.toGMTString() + "; path=/";
        document.cookie = 'cna=' + cna + expires;
    };
    if (!document.cookie.match(/cna=([^;]+);/)) GM_xmlhttpRequest({
        method: 'GET',
        url: 'https://log.mmstat.com/eg.js',
        headers: {
            referer: location.href
        },
        timeout: 3000,
        onload: e => {
            if (!(e && e.responseText)) return cnaFake();
            let cna = e.responseText.match(/Etag="([^"]+)"/);
            if (cna && cna[1]) cnaFake(cna[1]);
            else cnaFake();
        },
        onerror: e => {
            cnaFake();
            //console.warn(e);
        }
    });
})();