global.localStorage.js
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/**
* 20180304 yxt 添加本地缓存机制
*/
/*
* 定义一个缓存类
* modelctls URL
* param 参数
* result 结果
* */
function CacehKey(url,data,type,result)
{
this.url = url;
this.data = data;
this.type = type;
this.KeyString = function()
{
var keyString = JSON.stringify(this.url) + ";" + JSON.stringify(this.data) + ";" + JSON.stringify(this.type) ;
return keyString;
}
}
//系统级请求本地缓存
function GlobalLocalCache()
{
this.flag = true;
//添加缓存
this.AddCache = function(url,data,type,result)
{
if(!window.localStorage){
console.log("浏览器不支持localstorage");
return ;
}else{
var key = new CacehKey(url,data,type);
var keyString = key.KeyString();
var valueString = JSON.stringify(result);
if(this.flag){
keyString = encodeURI(keyString);
valueString = encodeURI(valueString);
}
window.localStorage.setItem(keyString,valueString);
}
}
//获取缓存
this.GetCacheResult = function (url,data,type,result)
{
if(!window.localStorage){
console.log("浏览器不支持localstorage");
result = null;
return null;
}else{
var key = new CacehKey(url,data,type);
var keyString = key.KeyString();
if(this.flag){
keyString = encodeURI(keyString);
}
var value = window.localStorage.getItem(keyString);
if(this.flag){
value = decodeURI(value);
}
result = JSON.parse(value);
return result;
}
}
//单个清除缓存
this.removeLocalCache = function(url,data,type,result)
{
if(!window.localStorage){
console.log("浏览器不支持localstorage");
return ;
}else{
var key = new CacehKey(url,data,type);
var keyString = key.KeyString();
if(this.flag){
keyString = encodeURI(keyString);
}
window.localStorage.removeItem(keyString);
}
}
//清理缓存
this.clearLocalCache = function ()
{
if(!window.localStorage){
console.log("浏览器不支持localstorage");
}else{
window.localStorage.clear();
}
}
//检查缓存版本
this.checkCacheVersion=function()
{
var pdata = {name : "后台配置版本"};
var localCache = this;
var curVersion = this.GetCacheResult(CONF_BACK_SERVERURL + global.modelctls.kvtree.all,
pdata,"");
$.ajax({
type : "POST",
url : CONF_BACK_SERVERURL + global.modelctls.kvtree.all,
headers : {
"token" : $.cookie('ftoken')
},
dataType : "json",
async : true,
data : pdata,
success : function(data) {
var curVersionStr = JSON.stringify(curVersion);
var dataStr = JSON.stringify(data);
if(dataStr != curVersionStr)
{
localCache.clearLocalCache();
localCache.AddCache(CONF_BACK_SERVERURL + global.modelctls.kvtree.all,
pdata,"",data);
}
},
error : function(data, textStatus, errorThrown) {
}
});
}
}
var globalLocalCache = null;
$(function(){
globalLocalCache = new GlobalLocalCache();
});