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QOS-Handler

QOS-Handler(window param ver)

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/430297/1128326/QOS-Handler.js 

// ==UserScript==
// @name         QOS-Handler
// @namespace    http://greasyfork.org/
// @version      0.2
// @description  QOS-Handler(window param ver)
// @author       Cosil.C
// @grant        unsafeWindow
// @license      GPL
// ==/UserScript==

/* jshint esversion: 6 */
/**
 * @description 流控相关
 */
unsafeWindow.qos = {
    /**
     * @description 记录这次的访问时间戳，并返回是否超出限制
     * @param sec 时间限制
     * @param timesLimit 次数限制
     * @returns sec秒内访问了超过timesLimit次 ? true : false
     */
    record: (sec, timesLimit) => {
        sec = sec || 5;
        timesLimit = timesLimit || 10;
        console.log(`start qos recording...\nsec:${sec},timesLimit:${timesLimit}`);
        let timestamp = new Date().getTime(), historyArr = document.defaultView.qos.getRecord();
        historyArr.push(timestamp);
        if (historyArr.length > timesLimit) {
            let shift;
            do {
                shift = parseInt(historyArr.shift());
            } while (historyArr.length > timesLimit);
            //
            if (timestamp - shift <= sec * 1000) {
                let format = function (target) {
                    return new Date(target).toTimeString().substr(0, 8);
                };
                console.log(`current:${format(timestamp)}, shift:${format(shift)}, interval(sec):${(timestamp - shift) / 1000}`);
                return true;
            }
        }
        localStorage.setItem('historyArr', JSON.stringify(historyArr));
        console.log('qos recorded');
        return false;
    },
    /**
     * @description 清除缓存中的记录
     */
    clearRecord: () => {
        localStorage.removeItem('historyArr');
    },
    /**
     * @description 获取记录的历史
     * @returns 历史记录数组
     */
    getRecord: () => {
        let historyArr;
        try {
            historyArr = JSON.parse(localStorage.getItem('historyArr') || '[]');
        } catch (e) {
            console.error(e);
            console.error(`cause:${localStorage.getItem('historyArr')}`);
            document.defaultView.qos.clearRecord();
            historyArr = [];
        }
        return historyArr;
    }
};