内存Cookie和硬盘Cookie

内存cookie，是指没有设在cookie的Expires的属性，此时cookie将停留在客户端的内存中，只有在该IE窗口中从“文件－新建－窗口”打开的新的IE窗和由form的target属性为_blank产生的新的IE窗口才共享同一个cookie信息。IE，Chome的选项卡都共享同一个cookie信息。

硬盘cookie，是指在你设置了cookie的Expires属性，此时cookie将保存到你的硬盘上，Win7是在C:\Users\Administrator\AppData\Roaming\Microsoft\Windows\Cookies 下面(如果你是Administrator账号的话)。此时所有的窗口将共享同一个名字的cookie。

针对内存cookie，用fiddler可以看到cookie 没有 exprires这个属性，只要关掉ie再重新打开页面将会丢失（注：如果不关掉原来的ie窗口，新打开ie访问页面cookie还是会在）。

如果内存cookie没有指定域,那么可以在多个不同的站点间共享内存cookie

MVC测试代码 Controller 文件如下：

public ActionResult WriteCookie()
        {
            HttpCookie cookie = new HttpCookie("Name1", "Nick");
            cookie.Expires = DateTime.Now.AddDays(1);
            cookie.Domain = "MVCTest2";
            Response.Cookies.Add(cookie);

            return View();
        }

        public ActionResult ReadCookie()
        {
            if (Request.Cookies["Name1"] != null)
            {
                ViewData["Cookie1"] = Request.Cookies["Name1"].Value;
            }

            return View();
        }

        public ActionResult WriteInMemoryCookie()
        {
            HttpCookie cookie = new HttpCookie("Name2", "Nick In Memory");
            cookie.Domain = "MVCTest2";
            Response.Cookies.Add(cookie);

            return View();
        }

        public ActionResult ReadInMemoryCookie()
        {
            if (Request.Cookies["Name2"] != null)
            {
                ViewData["Cookie2"] = Request.Cookies["Name2"].Value;
            }
            return View();
        }

4个cshtml如下

ReadCookie.cshtml

@{
    Layout = null;
}
<!DOCTYPE html>
<html>
<head>
    <title>ReadCookie</title>
</head>
<body>
    <div>
         @if(ViewData["Cookie1"]==null) {
        
        <text>No Cookie exists. </text>
            }
            else {
                <text>Cookie</text> @ViewData["Cookie1"].ToString();
            }
    </div>
</body>
</html>

ReadInMemoryCookie.cshtml

@{
    Layout = null;
}
<!DOCTYPE html>
<html>
<head>
    <title>ReadInMemoryCookie</title>
</head>
<body>
    <div>
        @if(ViewData["Cookie2"]==null) {
        
        <text>No In Memory Cookie exists. </text>
            }
            else {
                <text>In Memory Cookie</text> @ViewData["Cookie2"].ToString();
            }
    </div>
</body>
</html>

WriteCookie.cshtml

@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <title>Cookie</title>
</head>
<body>
    <div>
        Write Cookie Successfully.
    </div>
</body>
</html>

WriteInMemoryCookie.cshtml

@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <title>WriteInMemoryCookie</title>
</head>
<body>
    <div>
         Write In-Memory Cookie Successfully.
    </div>
</body>
</html>

posted on 2012-05-01 21:26 nick hao 阅读(6662) 评论(2) 编辑收藏举报