中间件编程

开发平台：
JavaScript

state.js：源码内容
							/*
 * Ext JS Library 3.0.0
 * Copyright(c) 2006-2009 Ext JS, LLC
 * licensing@extjs.com
 * http://www.extjs.com/license
 */
Ext.state.Provider=function(){this.addEvents("statechange");this.state={};Ext.state.Provider.superclass.constructor.call(this)};Ext.extend(Ext.state.Provider,Ext.util.Observable,{get:function(b,a){return typeof this.state[b]=="undefined"?a:this.state[b]},clear:function(a){delete this.state[a];this.fireEvent("statechange",this,a,null)},set:function(a,b){this.state[a]=b;this.fireEvent("statechange",this,a,b)},decodeValue:function(a){var k=/^(a|n|d|b|s|o):(.*)$/;var c=k.exec(unescape(a));if(!c||!c[1]){return}var f=c[1];var h=c[2];switch(f){case"n":return parseFloat(h);case"d":return new Date(Date.parse(h));case"b":return(h=="1");case"a":var g=[];var j=h.split("^");for(var b=0,d=j.length;b<d;b++){g.push(this.decodeValue(j[b]))}return g;case"o":var g={};var j=h.split("^");for(var b=0,d=j.length;b<d;b++){var e=j[b].split("=");g[e[0]]=this.decodeValue(e[1])}return g;default:return h}},encodeValue:function(c){var b;if(typeof c=="number"){b="n:"+c}else{if(typeof c=="boolean"){b="b:"+(c?"1":"0")}else{if(Ext.isDate(c)){b="d:"+c.toGMTString()}else{if(Ext.isArray(c)){var f="";for(var e=0,a=c.length;e<a;e++){f+=this.encodeValue(c[e]);if(e!=a-1){f+="^"}}b="a:"+f}else{if(typeof c=="object"){var f="";for(var d in c){if(typeof c[d]!="function"&&c[d]!==undefined){f+=d+"="+this.encodeValue(c[d])+"^"}}b="o:"+f.substring(0,f.length-1)}else{b="s:"+c}}}}}return escape(b)}});Ext.state.Manager=function(){var a=new Ext.state.Provider();return{setProvider:function(b){a=b},get:function(c,b){return a.get(c,b)},set:function(b,c){a.set(b,c)},clear:function(b){a.clear(b)},getProvider:function(){return a}}}();Ext.state.CookieProvider=function(a){Ext.state.CookieProvider.superclass.constructor.call(this);this.path="/";this.expires=new Date(new Date().getTime()+(1000*60*60*24*7));this.domain=null;this.secure=false;Ext.apply(this,a);this.state=this.readCookies()};Ext.extend(Ext.state.CookieProvider,Ext.state.Provider,{set:function(a,b){if(typeof b=="undefined"||b===null){this.clear(a);return}this.setCookie(a,b);Ext.state.CookieProvider.superclass.set.call(this,a,b)},clear:function(a){this.clearCookie(a);Ext.state.CookieProvider.superclass.clear.call(this,a)},readCookies:function(){var d={};var g=document.cookie+";";var b=/s?(.*?)=(.*?);/g;var f;while((f=b.exec(g))!=null){var a=f[1];var e=f[2];if(a&&a.substring(0,3)=="ys-"){d[a.substr(3)]=this.decodeValue(e)}}return d},setCookie:function(a,b){document.cookie="ys-"+a+"="+this.encodeValue(b)+((this.expires==null)?"":("; expires="+this.expires.toGMTString()))+((this.path==null)?"":("; path="+this.path))+((this.domain==null)?"":("; domain="+this.domain))+((this.secure==true)?"; secure":"")},clearCookie:function(a){document.cookie="ys-"+a+"=null; expires=Thu, 01-Jan-70 00:00:01 GMT"+((this.path==null)?"":("; path="+this.path))+((this.domain==null)?"":("; domain="+this.domain))+((this.secure==true)?"; secure":"")}});

						