Cookies揭秘 [Asp.Net, Javascript]

7.Cookies加密

8.Cookies与Ajax

四.Cookies最佳实践

（1）Asp.Net中保存Cookies

Response.Cookies["k1"].Value="k1Value";Response.Cookies["k2"]["k2-1"]="k2-1Value";Response.Cookies.Add(newHttpCookie("k3","k3Value"));

Request["k1"];Request.Cookies["k1"].Value;Request.Cookies["k2"]["k2-1"];Request.Cookies.Get(0).Value;

（2）以对象方式保存Cookies

///<summary>///Cookies基类。将需要保存Cookies的数据类此类派生，可以将强类型对象在Cookies中的保存和读取。///</summary>///<remarks>///2009.8.6ziqiu.zhangcreated///</remarks>///<example>///假设MyCookiesInfo是从从Cookies中获取对象：///<code>///CookieInfoitem=newCookieInfo();//new以后已经从Cookies中构造了对象。///</code>///将对象保存在Cookies中：///<code>///CookieInfoitem=newCookieInfo();///item.value="testvalue";///item.SetCookies("1");//Cookies有效期为1天///</code>///</example>[System.Serializable]publicclassCookieInfo{#region====================ConstructedMethod====================///<summary>///构造函数///</summary>publicCookieInfo(){}#endregion#region====================PublicMethod====================///<summary>///得到当前Cookies的过期时间///</summary>///<returns>过期时间</returns>publicDateTimeGetExpiresTime(){stringcookieName=GetType().ToString();if(HttpContext.Current.Request.Cookies[cookieName]!=null){returnHttpContext.Current.Request.Cookies[cookieName].Expires;}returnDateTime.MinValue;}///<summary>///保存Cookies，过期时间为浏览器关闭则失效。///</summary>///<paramname="expiresTime">Cookies过期事件</param>///<returns>是否保存成功</returns>publicboolSave(){returnthis.Save(DateTime.MinValue);}///<summary>///保存Cookies，需要指定过期时间。///</summary>///<paramname="expiresTime">Cookies过期事件</param>///<returns>是否保存成功</returns>publicboolSave(DateTimeexpiresTime){stringCookieName=GetType().ToString();HttpCookieSessionCookie=null;//对SessionId进行备份.if(HttpContext.Current.Request.Cookies["ASP.NET_SessionId"]!=null){stringSesssionId=HttpContext.Current.Request.Cookies["ASP.NET_SessionId"].Value.ToString();SessionCookie=newHttpCookie("ASP.NET_SessionId");SessionCookie.Value=SesssionId;}//设定cookie过期时间.DateTimedtExpiry=expiresTime;HttpContext.Current.Response.Cookies[CookieName].Expires=dtExpiry;//设定cookie域名.stringdomain=string.Empty;if(HttpContext.Current.Request.Params["HTTP_HOST"]!=null){//domain="www.elong.com";domain=HttpContext.Current.Request.Params["HTTP_HOST"].ToString();}//如果是www.elong.com或多级域名,需要转化为elong.comif(domain.IndexOf(".")>-1){string[]temp=domain.Split('.');if(temp.Length>=3){domain=temp[temp.Length-2].Trim()+"."+temp[temp.Length-1].Trim();}HttpContext.Current.Response.Cookies[CookieName].Domain=domain;}//把类的属性,写入Cookie.PropertyInfo[]Propertys=GetType().GetProperties();foreach(PropertyInfopiinPropertys){objectoj=pi.GetValue(this,null);Typetype=pi.PropertyType;stringvalueStr=string.Empty;if(oj!=null&&oj.ToString()!=string.Empty){if(type==Type.GetType("System.DateTime")){valueStr=((DateTime)oj).ToString("yyyy/MM/ddHH:mm:ss",System.Globalization.DateTimeFormatInfo.InvariantInfo);}else{valueStr=oj.ToString();}HttpContext.Current.Response.Cookies[CookieName][pi.Name]=HttpUtility.UrlEncode(valueStr);}}//如果cookie总数超过20个,重写ASP.NET_SessionId,以防Session丢失.if(HttpContext.Current.Request.Cookies.Count>20&&SessionCookie!=null){if(SessionCookie.Value!=string.Empty){HttpContext.Current.Response.Cookies.Remove("ASP.NET_SessionId");HttpContext.Current.Response.Cookies.Add(SessionCookie);}}returntrue;}///<summary>///找回Cookie值///</summary>publicvoidLoad(){stringcookieValue=string.Empty;stringCookieName=GetType().ToString();//通过遍历属性,从cookie中找回值,回写到属性.PropertyInfo[]Propertys=GetType().GetProperties();foreach(PropertyInfopiinPropertys){try{cookieValue=HttpUtility.UrlDecode(HttpContext.Current.Request.Cookies[CookieName][pi.Name].ToString());}catch{cookieValue=string.Empty;}if(pi.CanWrite&&cookieValue!=null&&cookieValue!=string.Empty){try{objectobb=cookieValue;Typetype=pi.PropertyType;obb=Convert.ChangeType(obb,type);pi.SetValue(this,obb,null);}catch{}}}}#endregion}

///<summary>///保存Cookies的数据对象///</summary>[System.Serializable]publicclassMyCookieInfo:CookieInfo{privateintm_Pkid=0;publicintPkid{get{returnm_Pkid;}set{m_Pkid=value;}}privatestringm_TestValue="";publicstringTestValue{get{returnm_TestValue;}set{m_TestValue=value;}}privateDateTimem_TestDateTime=DateTime.Now;publicDateTimeTestDateTime{get{returnm_TestDateTime;}set{m_TestDateTime=value;}}}

MyCookieInfotestCookies=newMyCookieInfo();testCookies.Pkid=1;testCookies.TestValue="中文测试";testCookies.Save();

MyCookieInfotestCookies=newMyCookieInfo();testCookies.Load();this.lblMsg.Text="Pkid:"+testCookies.Pkid.ToString();this.lblMsg.Text+=",TestValue:"+testCookies.TestValue.ToString();this.lblMsg.Text+=",TestDateTime:"+
testCookies.TestDateTime.ToString("yyyy/MM/ddHH:mm:ss",
System.Globalization.DateTimeFormatInfo.InvariantInfo);

（3）使用Javascript操作Cookies

$.cookie("singleKey")

$.cookie("singleKey","","singleKey-value",{expires:1,path:"/",secure:false})

$.cookie("multiKey","subName1")

varsubNameObj={subName1:"aaa",subName2:"bbb",subName3:"ccc"};

$.cookie("multiKey","",subNameObj,{expires:1,path:"/",secure:false});

varmyDate=newDate();myDate.setFullYear(2009,10,10);$.cookie("singleKey","","singleKey-value",{expires:myDate,secure:false})

vartime=Date();

$.cookie("singleKey","","singleKey-value",{expires:1,path:"/",secure:false})