javascript - 在 JavaScript 中获取和设置 session 变量

Question

我在每个页面上都包含一个通用脚本，一旦用户登录，它就会将idletime变量初始化为0，并在每30秒后递增它，我为此编写了函数，该函数工作正常，但在递增之后变量我必须将该值设置为某个 session 级别变量，以便在每个页面刷新时此函数增量应该获得该增量值。请找到下面的代码

<script type="text/javascript">
var timeOut=600000;//This is timeout value in miliseconds
    var idleTime = 0; // we shud get the incremented value on everypage refresh for this variable
    $(document).ready(function () {
     //Increment the idle time counter every minute.
    var idleInterval = setInterval(timerIncrement, 30000); //30seconds
});

function timerIncrement() {
idleTime = idleTime + .5;//incrementing the counter by 30 seconds
var timeout= timeOut/60000;
if (idleTime > (timeout-2)) { 
    document.getElementById('logoutLink').click();
}
}
</script>

Answer 1

听起来像你想要的 web storage ，特别是 sessionStorage，其中有 excellent support (基本上，除了 Opera Mini 之外，甚至最近的所有东西都可以使用它 [甚至是 IE8])。

// On page load (note that it's a string or `undefined`):
var idleTime = parseFloat(sessionStorage.idleTime || "0");

// When updating it (it will automatically be converted to a string):
sessionStorage.idleTime = idleTime += .5;

<小时/>

话虽如此，如果您的目标是在 10 分钟不活动后单击注销链接，那么似乎可能会更简单一些:

$(document).ready(function() {
    var lastActivity = parseInt(sessionStorage.lastActivity || "0") || Date.now();
    setInterval(function() {
        if (Date.now() - lastActivity > 600000) { // 600000 = 10 minutes in ms
            document.getElementById('logoutLink').click();
        }
    }, 30000);

    // In response to the user doing anything (I assume you're setting
    // idleTime to 0 when the user does something
    $(/*....*/).on(/*...*/, function() {
        sessionStorage.lastActivity = lastActivity = Date.now();
    });
});