Question

我需要每隔5分钟调用一次函数，持续8小时。问题是必须在同一天。例如，如果用户在3月29日晚上11:59登录系统，现在是3月30日上午12:01，则不再调用该函数。

我知道如何在5分钟内调用它并将jquery ajax调用编码。那部分没问题。我的问题是搞清楚日期。有人请帮助我吗？如果需要，我可以提供更多细节。

先谢谢你，

森

抱歉，我忘了密码：

var startDay;

function keepAlive(currDay) {
    var today = new Date().getDate();
    if (currDay == today) {
        $.ajax({
            type: "POST",
            contentType: "application/json; charset=utf-8",
            data: "{ alive: 'true' }",
            url: "../ses/imsi_ses_edit.aspx/KeepSessionAlive",
            dataType: "json",
            success: function(data) {
            },
            error: function(response) {
                alert(response.responseText);
            }
        });
    }
}
window.onload = function() {
    startDay = new Date().getDate();
    keepAlive(startDay); //Make sure the function fires as soon as the page is loaded

    setTimeout(keepAlive, 300000); //Then set it to run again after five minutes
}

Answer 1

var initDate = new Date(); // Or get the user login date from an HTML element (i.e. hidden input)
var interval;

function keepAlive() {
    // Do stuff (ajax call)
}

window.onload = function() {
    keepAlive();

    interval = window.setInterval(function() {
        var now = new Date();
        if(now.getTime() - initDate.getTime() < 8*60*60*1000 && now.getDate() == initDate.getDate()) {
            keepAlive();
        }
        else {
            // Stop the interval
            window.clearInterval(interval);
        }
    }, 5*60*1000);
}

Answer 2

function keepAlive(currDay) {        
    $.ajax({
        type: "POST",
        contentType: "application/json; charset=utf-8",
        data: "{ alive: 'true' }",
        url: "../ses/imsi_ses_edit.aspx/KeepSessionAlive",
        dataType: "json",
        success: function(data) {
        },
        error: function(response) {
            alert(response.responseText);
        }
    });
}
window.onload = function() {
    var startDay = new Date().getDate();
    var startTime = new Date().getTime();
    var interval;
    keepAlive(startDay); //Make sure the function fires as soon as the page is loaded

    interval = setInterval( function () {
        if (startDay != new Date().getDate() || startTime < (new Date().getTime() - 1000*60*60*8)) {
            clearInterval(interval);
            return;
        }
        keepAlive();
    }, 300000); //Then set it to run again after five minutes
}

Javascript / Jquery呼叫功能每5分钟一次，持续8小时

2 个答案: