Question

加载页面时，我需要检查会话。只有在有会话时才加载页面。

我在js中添加一个代码并从该页面的body onload调用，这对FF工作正常，但在IE中却没有。

我在Js中的代码

checkSession= function(){
    var sessionVal = false;
    $.ajax( {
        url : 'checksession.html',
        async : false,
        success : function(data) {
            if (data.trim() == 'true') {
                sessionVal = true;
            }
        }

    });
    return sessionVal;
};
function redirectLogin(){
    if (!checkSession()) {
        jAlert("Oops... Your session has expired, please re-login...");
        window.location = cdContextPath + '/login.html';
    }   
}

在jsp中

<body onload="redirectLogin();">

任何解决方案？

Answer 1

我建议采用不同的方式。

var checkSession = function(){
    $.ajax({
        url : 'checksession.html',
        dataType : 'json',
        async : false,
        success : function(data) {
            if (data.validSession != true) {
                redirectLogin();
            }
        }
    });
}

function redirectLogin(){
    jAlert("Oops... Your session has expired, please re-login...");
    window.location = cdContextPath + '/login.html';
}

$(document).ready(checkSession);

然后用JSON发回一个响应（注意，这只是一个模型/示例）：

<?php

function checkSession() {
    if (yourSessionCheckStuff) {
        return 'true';
    }

    return 'false';
}

echo '{"validSession" : ' + checkSession() + '}';

// Same as the echo above, but uses json_encode()
// You only need one or the other, and I'd used
// the below.

$json = new stdClass();
$json->validSession = checkSession();

echo json_encode($json);

?>

修改

我创建了一个工作测试用例。参见：

http://jfcoder.com/test/index.php

然后点击要切换的链接。这在IE9中没有问题。

这是使其有效的代码。请注意，$_GET和会话检查只是证明重定向的替身。我还将jAlert()替换为常规alert()。

<强>的index.php

<?php session_start(); if ($_GET['emulateloggedin'] == 'true') { $_SESSION['loggedin'] = true; } else { $_SESSION['loggedin'] = false; } ?> <html> <head> <title>Login Redirect Test</title> </style> <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script> <script type="text/javascript"> var checkSession = function(){ $.ajax({ url : 'checkSession.php', dataType : 'json', async : false, success : function(data) { // Unless the returned value is true, redirect. if (data.validSession != 'true') { redirectLogin(); } // You may also want to initialize any of the page // routines here, after the check is finished. // Just a suggestion, you could return the amount // of time the session has left and save that // locally. Then you could add a "You will be // logged out unless..." message that prompts // the user to continue the session or logout, // and automatically redirect when the time // runs out. } }); } function redirectLogin(){ alert("Oops... Your session has expired, please re-login..."); window.location = 'login.html'; } $(document).ready(checkSession); </script> </head> <body> <p>If you see this, you are "logged in". <a href="index.php?emulateloggedin=false">Logout?</a></p> </body> </html>

<强>的login.html

<html> <head> <title>Login Redirect Test</title> </style> <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script> <script type="text/javascript"> </script> </head> <body> <p>If you see this, you are "logged out". <a href="index.php?emulateloggedin=true">Login?</a></p> </body> </html>

<强> checkSession.php

<?php session_start(); function checkSession() { if ($_SESSION['loggedin'] == true) { return 'true'; } return 'false'; } $json = new stdClass(); $json->validSession = checkSession(); echo json_encode($json); ?>

检查会话在IE中不起作用

1 个答案: