jQuery和Ci沒有正確處理註銷功能

Question

我在做下面的代碼錯了嗎？當Ci會話過期時，我似乎無法獲得警報（「成功」）。下面是我的jQuery和詞代碼：

setInterval(function() { 
    jQuery.getJSON("<?=base_url()?>index.php/regUserDash/sessionExpire", function(data) { 
     var sessionState = jQuery.parseJSON('{"sessionExpired":"true","sessionExpired":"false"}'); 
     if(sessionState.sessionExpired === "true") { // if session is expired run the following code 
      var dataString = 'true'; 
      jQuery.ajax({ // send the expired signal to Ci so that it knows the session has expired 
       type: 'POST', 
       dataType: 'JSON', 
       url: '<?=base_url()?>index.php/regUserDash/extendSession', 
       data: {'dataString': true}, 
       success: function(data) { 
        if (data.extendedSession == true) { 
         alert('success'); 
        } else { 
         return false; 
        } 
       } 
      }); 
     } else if(sessionState.sessionExpired == "false") { 
      return; 
     } 
    }); 
}, 120000); // loop through every 2 minutes 

笨代碼：

public function sessionExpire() { 
     if ($this->session->userdata("logged") == "1") { 
      echo json_encode(array("sessionExpired" => false)); 
     } elseif($this->session->userdata("logged") == "0") { 
      echo json_encode(array("sessionExpire" => true)); 
     } 
    } public function extendSession() { 
     // set loggedIn session var 
     $this->session->set_userdata('logged', '1'); 
     // return json to ajax call 
     echo json_encode(array("extendedSession" => true)); 
    } 

Answer 1

jQuery.parseJSON('{"sessionExpired":"true","sessionExpired":"false"}');回報第一sessionExpired = true和第二sessionExpired = false，其覆蓋第一。

所以，這裏是要做到這一點（需要測試）的一種方法：

setInterval(function() { 
    jQuery.getJSON("<?=base_url()?>index.php/regUserDash/sessionExpire", function(data) { 
     if(data.sessionExpired == "true") { // if session is expired run the following code 
      // var dataString = 'true'; // Remove this 
      jQuery.ajax({ // send the expired signal to Ci so that it knows the session has expired 
       type: 'POST', 
       dataType: 'JSON', 
       url: '<?=base_url()?>index.php/regUserDash/extendSession', 
       data: {'dataString': true}, 
       success: function(data) { 
        //if (data.extendedSession == true) { 
         alert('success'); 
        //} else { 
        // return false; 
        //} 
        // Remove commented code, because extendSession() always return true 
       } 
      }); 
     } else { 
      return 'Session not expired!'; 
     } 
    }); 
}, 120000); // loop through every 2 minutes 

和CI功能：

public function sessionExpire() 
{ 
    if ($this->session->userdata("logged") == "1") { 
     echo json_encode(array("sessionExpired" => false)); 
    } elseif ($this->session->userdata("logged") == "0") { 
     echo json_encode(array("sessionExpired" => true)); 
    } 
} 

public function extendSession() 
{ 
    // set loggedIn session var 
    $this->session->set_userdata('logged', '1'); 
    // return json to ajax call 
    echo json_encode(array("extendedSession" => true)); 
}