87 lines
2.0 KiB
JavaScript
87 lines
2.0 KiB
JavaScript
/**
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* 缓存数据优化
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* var cache = require('utils/cache.js');
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* import cache from '../cache'
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* 使用方法 【
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* 一、设置缓存
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* string cache.put('k', 'string你好啊');
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* json cache.put('k', { "b": "3" }, 2);
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* array cache.put('k', [1, 2, 3]);
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* boolean cache.put('k', true);
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* 二、读取缓存
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* 默认值 cache.get('k')
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* string cache.get('k', '你好')
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* json cache.get('k', { "a": "1" })
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* 三、移除/清理
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* 移除: cache.remove('k');
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* 清理：cache.clear();
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* 】
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* @type {String}
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*/
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var postfix = '_mallStore'; // 缓存前缀
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/**
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* 设置缓存
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* @param {[type]} k [键名]
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* @param {[type]} v [键值]
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* @param {[type]} t [时间、单位秒]
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*/
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function put(k, v, t) {
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uni.setStorageSync(k, v)
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var seconds = parseInt(t);
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if (seconds > 0) {
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var timestamp = Date.parse(new Date());
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timestamp = timestamp / 1000 + seconds;
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uni.setStorageSync(k + postfix, timestamp + "")
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} else {
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uni.removeStorageSync(k + postfix)
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}
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}
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/**
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* 获取缓存
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* @param {[type]} k [键名]
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* @param {[type]} def [获取为空时默认]
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*/
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function get(k, def) {
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var deadtime = parseInt(uni.getStorageSync(k + postfix))
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if (deadtime) {
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if (parseInt(deadtime) < Date.parse(new Date()) / 1000) {
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if (def) {
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return def;
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} else {
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return false;
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}
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}
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}
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var res = uni.getStorageSync(k);
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if (res) {
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return res;
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} else {
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if (def == undefined || def == "") {
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def = false;
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}
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return def;
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}
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}
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function remove(k) {
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uni.removeStorageSync(k);
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uni.removeStorageSync(k + postfix);
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}
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/**
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* 清理所有缓存
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* @return {[type]} [description]
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*/
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function clear() {
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uni.clearStorageSync();
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}
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module.exports = {
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put: put,
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get: get,
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remove: remove,
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clear: clear,
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} |