使用Javascript setTimeout調用MVC操作來保持活動表單身份驗證

Question

我使用setTimeout來調用MVC操作來嘗試保持用戶表單身份驗證的活動狀態。

當我正常調用此代碼（即不使用setTimeout）時，它會保持表單身份驗證活着。

在setTimeout中調用時，它不會。

我的問題是爲什麼當通過setTimeout調用時不工作？

$(document).ready(function() { 

    DoKeepAlive(); //simple test when page loads....does keep forms auth alive 
}); 


var timeout= 0; 
timeout= setTimeout(validationPrompt, 2 * 60 * 1000); 

function validationPrompt() { 

    var answer = confirm("Your session will timeout in less than a minute. Click OK to stay logged in, and reset the timout period.") 
    if (answer) { 

     DoKeepAlive();  //when called in here by setTimeout, does NOT keep forms auth alive 

     //re-set the 10 minutes count 
     clearTimeout(timeout); 
     timeout= setTimeout(validationPrompt, 2 * 60 * 1000); 
    } 
    else { 
     var URL = "<%= Url.Content("~/Account/Logoff") %>" 
     window.location = URL; 
    } 
} 

function DoKeepAlive(){ 

     var URL = "<%= Url.Content("~/Account/ValidateAuthentication") %>" 
    $.post(
      //"../../Account/ValidateAuthentication",  
      URL, 
      function(data) { 

      } 
     ); 

} 

Answer 1

經過多次來回發酵，我發現今天我使用的服務器上的時間慢了3分鐘。在這個thread觸發幫助我。

Answer 2

很難說爲什麼你的代碼不工作。我會首先嚐試簡化它：

<script type="text/javascript"> 
    window.setInterval(function() { 
     var answer = confirm("Your session will timeout in less than a minute. Click OK to stay logged in, and reset the timout period."); 
     if (answer) { 
      $.post('<%= Url.Action("ValidateAuthentication", "Account") %>'); 
     } else { 
      window.location.href = '<%= Url.Action("Logoff", "Account") %>'; 
     } 
    }, 2 * 60 * 1000); 
</script> 

Answer 3

嘗試把timeout= setTimeout(validationPrompt, 2 * 60 * 1000);內$(document).ready？