缓存设置（失效时间）

/*
* @desc 缓存
* @params
* preId {String, Number} 缓存前缀
* time {Number} 缓存时长
* @author niuyueyang
* @date 2020/08/05
* */
const BaseStorage = function (preId) {this.preId = preId || 'WEIBO-';this.time = -1;this.expression = '|-|'
}
BaseStorage.prototype = {status: {SUCCESS: 0,FAILURE: 1,OVERFLOW: 2,TIMEOUT: 3},storage: localStorage || window.localStorage,/** @desc 删除cookie* @params* key {String} 缓存键值* value {String, Number, Array, Object} 缓存的值* t {Number} 缓存时长（单位：天），-1代表永久缓存* @author niuyueyang* @date 2020/08/05* @public* */setCookie: function(key, value, t){var oDate = new Date();oDate.setDate(oDate.getDate()+t);if(t != -1){document.cookie=key+"="+encodeURIComponent(value)+";expires="+oDate.toUTCString();}else{document.cookie=key+"="+encodeURIComponent(value);}if(this.getCookie(key)){return true;}else{return false;}},/** @desc 获取cookie* @params* key {String} 缓存键值* @author niuyueyang* @date 2020/08/05* @public* */getCookie: function (key){var str = document.cookie.replace(/;\s*/,';');var cookieArr = str.split(';');var cookieObj = {};var len = cookieArr.length;for(var i = 0; i < len; i++){var item = cookieArr[i];var k = item.split('=')[0];var v = item.split('=')[1];cookieObj[k] = v;}if(cookieObj[key]){return decodeURIComponent(cookieObj[key]);}else{return false;}},/** @desc 删除cookie* @params* key {String} 缓存键值* @author niuyueyang* @date 2020/08/05* @public* */removeCookie: function (key){document.cookie = key+"=; expires=Thu, 01 Jan 1970 00:00:00 GMT";if(!this.getCookie(key)){return true;}else{return false;}},getKey: function(key){return this.preId + key;},/** @desc 设置缓存* @params* type {String} 缓存类型 local session cookie* key {String} 缓存键值* val {Array, Object, String, Number} 要缓存的值* time {Number} 缓存时长（单位：天），-1代表永久缓存* cb {Function} 回调* @author niuyueyang* @date 2020/08/05* @public* */set: function (type, key, val, time, cb) {var status = this.status.SUCCESS;key = this.getKey(key);if(type == 'local'){this.storage = localStorage || window.localStorage}else if(type == 'session'){this.storage = sessionStorage || window.sessionStorage}else{this.storage = document.cookie;}// 未设置失效时间，默认是一个月try{if(time != -1){this.time = new Date().getTime() + time * 24 * 60 * 1000 ;}else{this.time = -1}}catch(e){this.time = new Date().getTime() + 1000 * 24 * 60 * 60 * 31;}try {if(window.localStorage || window.sessionStorage){if(type == 'local' || type == 'session'){if(typeof val != Object){val = this.time != -1 ? val + '|-|'+this.time : val;this.storage.setItem(key, val)}else{val = this.time != -1 ? JSON.stringify(val) + '|-|'+this.time : val;this.storage.setItem(key, val)}}else{this.setCookie(key, val, this.time)}}else{this.setCookie(key, val, this.time)}}catch(e){status = this.status.OVERFLOW;}cb && cb.call(this, status, key, val);},/** @desc 获取缓存* @params* type {String} 缓存类型 local session cookie* key {String} 缓存键值* cb {Function} 回调* @author niuyueyang* @date 2020/08/05* @public* */get: function (type, key, cb) {var status = this.status.SUCCESS;key = this.getKey(key);var value = '';var timeExpire = 0;if(type == 'local'){this.storage = localStorage || window.localStorage}else if(type == 'session'){this.storage = sessionStorage || window.sessionStorage}else{this.storage = document.cookie;}try{if(window.localStorage || window.sessionStorage){var index = this.storage.getItem(key).indexOf(this.expression);timeExpire = this.time != -1 ? Number(this.storage.getItem(key).slice(index + this.expression.length)) : -1if(type == 'local' || type == 'session'){value = this.storage.getItem(key);}else{value = this.getCookie(key)}}else{value = this.getCookie(key)}}catch(e){value = null;cb && cb.call(this, status, key, value);return value;}if(timeExpire == -1 || new Date().getTime() <= timeExpire){cb && cb.call(this, status, value);}else{value = null;status = this.status.TIMEOUT;this.remove(type, key)}},/** @desc 删除缓存* @params* type {String} 缓存类型 local session cookie* key {String} 缓存键值* cb {Function} 回调* @author niuyueyang* @date 2020/08/05* @public* */remove: function (type, key, cb) {var status = this.status.FAILURE;key = this.getKey(key);if(type == 'local'){this.storage = localStorage || window.localStorage}else if(type == 'session'){this.storage = sessionStorage || window.sessionStorage}else{this.storage = document.cookie;}try{if(window.localStorage || window.sessionStorage){if(type == 'local' || type == 'session'){this.storage.removeItem(key);}else{this.removeCookie(key);}}else{this.removeCookie(key);}cb && cb.call(this, status, null);}catch(e){cb && cb.call(this, this.status.FAILURE);}}
}

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