使用Flash Cookie技术在客户端永久保存HTTP Cookie「建议收藏」

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/** * Package laohan.flashcookie * Author:handaoliang * Create Date:2009.11.03 * Last Mofied Date:2009.11.03 * CopyRights:Handaoliang.com All Rights Reserved. **/ package laohan.flashcookie { //注：由于我没有装Flex，所以只好使用Flash CS3来嵌入。 //如果使用Flash Developer，则MovieClip这个包可以不包含。 import flash.display.MovieClip; import flash.net.SharedObject; import flash.external.ExternalInterface;

public class myFlashCookie extends MovieClip {//如果使用Flex，可以不继承这个类。
    private var cookieTimeOut:uint;
    private var cookieName:String;
    private var cookieSharedObj:SharedObject;
	private var currentCookie:Object;
    private var cookieValue:String;

    //构造函数。
    public function myFlashCookie(cName:String = "handaoliang", timeOut:uint=3600) {
        cookieName = cName;
        cookieTimeOut = timeOut;
        cookieSharedObj = SharedObject.getLocal(cName, "/" );	
	    if(isCookieExist(cName)){//如果FlashCookies存在。
	        currentCookie = getCookies(cName);
            //调用JavaScript里的jsSetCookies方法来设置HTTPCookie
            ExternalInterface.call("jsSetCookies",{fcookie:currentCookie});
            //trace(currentCookie);
	    }
    }
    //到期删除Cookies
    public function clearTimeOut():void {
        var obj:* = cookieSharedObj.data.cookie;
        if(obj == undefined){
            return;
        }
        for(var key in obj){
            if(obj[key] == undefined || obj[key].time == undefined || isTimeOut(obj[key].time)){
                delete obj[key];
            }
        }
        cookieSharedObj.data.cookie = obj;
        cookieSharedObj.flush();
    }
    //添加Cookies( key-value )
    public function saveCookies(key:String, value:*):void {
        var today:Date = new Date();
        key = "key_"+key;
        value.time = today.getTime();
        if(cookieSharedObj.data.cookie == undefined){
            var obj:Object = {};
            obj[key] = value;
            cookieSharedObj.data.cookie = obj;
        }else{
            cookieSharedObj.data.cookie[key] = value;
        }
        cookieSharedObj.flush();
    }
    //删除当前Cookies
    public function removeCookies(key:String):void {
        if (isCookieExist(key)) {
            delete cookieSharedObj.data.cookie["key_" + key];
            cookieSharedObj.flush();
        }
    }
    //通过Key来获取Cookies值。
    public function getCookies(key:String):Object{
        return isCookieExist(key)?cookieSharedObj.data.cookie["key_"+key]:null;
    }
    //检查Cookies是否存在。
    public function isCookieExist(key:String):Boolean{
        key = "key_" + key;
        return cookieSharedObj.data.cookie != undefined && cookieSharedObj.data.cookie[key] != undefined;
    }
    //检查Cookies的到期时间
    private function isTimeOut(time:uint):Boolean {
        var today:Date = new Date();
        return time + cookieTimeOut * 1000 < today.getTime();
    }
    //取得Cookies的到期时间;
    public function getTimeOut():uint {
        return cookieTimeOut;
    }
    //取得Cookies名称。
    public function getName():String {
        return cookieName;
    }
    //清除所有的Cookies值。
    public function clearCookies():void {
        cookieSharedObj.clear();
    }
}

}

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//先定义一个全局变量
var flashCookiesValue = Null;
var jsSetCookies = function(flahCookieValue){
var o = arguments[0];
flashCookiesValue = o.fcookie;//在SWF执行时传递过来的值。
document.cookie="handaoliang="+flashCookiesValue+";path=/;expires=Fri, 04-Dec-2009 08:44:07 GMT;domain=handaoliang.com";
};