缓存设置（失效时间）

ゞ浴缸里的玫瑰 2023-03-06 05:39 14阅读 0赞

/* * @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)) : -1
                    if(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);
            }
        }
    }