一个项目中,使用多个COOKIE 联合判断用户状态
背景如下
userid usercode username
三个COOKIE ,如果都存在则判断是否有session 否则 删除cookie 提示用户重新登录
一开始我使用JS 生成COOKIE 后来,因为其他原因改用 PHP生成,在测试过程中发现 ,在登录和首页不停的死循环
查看COOKIE 情况,发现 以前用JS生成的还在 因为我测试的时候 项目运行在子目录下面 所以PHP 并没有清除掉他们,经过实验和百度得知
多个同名 不同路径的COOKIE
如果页面在根目录,那么获取更目录下面的
如果页面在子目录,就获取子目录下面的
http://jinnianshilongnian.iteye.com/blog/1656534 这里得知
使用java.net.HttpURLConnection的工具/框架,如果多个同路径下同名的cookie将获取第一个;
使用apache HttpClient,和浏览器行为一样获取最后一个。
也就是说会获取到最新的一个COOKIE
但我用IE和 谷歌浏览器测试结果为
子目录下面的页面 获取顺序为PATH为当前目录的COOKIE 然后再获取上级目录 只要获取到 无论时间先后,就返回。并没有按照获取最新一个COOKIE的方式
那我疑惑了,如果按照我项目的逻辑 PHP 无法得知获取的到底是那个目录的COOKIE 也就无法删除这个COOKIE ,就一直死循环了。。。求解
回复讨论(解决方案)
不同??器的都有差?,
例如:
在/下?建cookie(actionType)时. 在firefox中,在/a下存在一个同名cookie时,firfox 会直接读/a下的cookie,忽略/下的cookie(即父路径cookie). 也就是说如果,/a的action为空时,firefox就认为action为空,不管父级同名cookie.
与之对比的是ie,在/下的cookie(action). 在/a下读cookie 时,即使/a下的cookie为空,ie会读父级同名cookie,相当于把父路径cookie和子路径cookie合起来读。但是优先读本路径cookie。
因此,当我们在使用cookie时,尽量保证服务器设置一个cookie。

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