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我正在使用远程 API 使用 AJAX 每 2 秒提取一次应用程序的控制台日志。除了用户单击页面上的链接以移动到其他位置之外，这在所有情况下都可以正常工作。这样做会触发错误回调而不实际提供任何数据，尽管刷新页面不会。

谁能告诉我可能导致此问题的原因以及该问题的潜在解决方案？

<script>
var server_id = getUrlParameter('id');
var lastFetchTime = 1;

$(document).ready(function()
{
    getConsoleMessages();

    setInterval(function()
    {
        getConsoleMessages();
    },2000);
});

function getConsoleMessages()
{
    var consoleBox = document.getElementById("console");

    $.ajax({
        type: "POST",
        url: "consoleHandler.php",
        data: { 'action': 'getConsoleMessages', 'server_id': server_id, 'since': lastFetchTime },
        dataType: 'json',
        success: function(data)
        {
            console.log(data);

            var messages = data['message']['chatdata'];

            if (messages.length > 0)
            {
                messages.forEach( function (item)
                {
                    // Skip lines we've already displayed
                    if (lastFetchTime >= item.timestamp)
                    {
                        return;
                    }

                    var timestamp = item.time; // /Date(1440823073243)/
                    var timestamp = timestamp.substring(timestamp.lastIndexOf("(")+1, timestamp.lastIndexOf(")"));

                    var contents = item.message;
                    lastFetchTime = item.timestamp;

                    // Get Date/Time in Milliseconds
                    var date = new Date(parseInt(timestamp));
                    var time = pad(date.getHours()) + ":" + pad(date.getMinutes()) + ":" + pad(date.getSeconds());

                    console_log("<font color='blue'>[" + time + "]</font>" + " " + contents);
                });
            }

            consoleBox.scrollTop = consoleBox.scrollHeight;
        },
        error: function(XMLHttpRequest, textStatus, errorThrown)
        {
            alert("Status: " + textStatus); alert("Error: " + errorThrown); alert("Message: " + XMLHttpRequest.responseText);
        }
    });
};
</script>

控制台处理程序.php

$action = $_POST['action'];
$response = array();

switch ($action)
{
    case "getConsoleMessages":
    {
        foreach ($_SESSION['servers'] as $server)
        {
            if ($server['whmcs_id'] == $_POST['server_id'])
            {
                $mcmyadmin = new McMyAdmin($server['mcma_user'], $server['mcma_pass'], $server['mcma_ip'], $server['mcma_port']);

                $result = $mcmyadmin->getChat($_POST['since']);

                $response['status'] = "success";
                $response['message'] = $result;
            }
        }

        echo json_encode($response);

        break;
    }
}
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