window.onbeforeunload Ajax请求的问题，Chrome浏览器 [英] window.onbeforeunload ajax request problem with Chrome

问题描述

我有一个处理，通过Ajax的远程控制一台机器的网页。当用户导航离开页面，我想从机器自动断开。因此，这里是code：

I have a web page that handles remote control of a machine through Ajax. When user navigate away from the page, I'd like to automatically disconnect from the machine. So here is the code:

window.onbeforeunload = function () {
        bas_disconnect_only();
}

断开连接功能，只需发送一个HTTP GET请求到PHP服务器端脚本，这确实断开的实际工作：

The disconnection function simply send a HTTP GET request to a PHP server side script, which does the actual work of disconnecting:

function bas_disconnect_only() {
   var xhr = bas_send_request("req=10", function() {
      }
      );
      }

这在Firefox正常工作。但随着Chrome浏览器，Ajax请求是不是在所有发送。有一种不能接受的解决办法：增加警惕回调函数：

This works fine in FireFox. But with Chrome, the ajax request is not sent at all. There is a unacceptable workaround: adding alert to the callback function:

 function bas_disconnect_only() {
   var xhr = bas_send_request("req=10", function() {
        alert("You're been automatically disconnected.");
      }
      );
      }

添加报警电话后，该请求将被成功发送。但正如你所看到的，它不是一个真正的工作，各地都没有。

After adding the alert call, the request would be sent successfully. But as you can see, it's not really a work around at all.

可能有人告诉我，如果这是可以实现与Chrome浏览器？什么我完全合法的做在我看来。

Could somebody tell me if this is achievable with Chrome? What I'm doing looks completely legit to me.

谢谢

推荐答案

我有同样的问题，在Chrome浏览器是不发送AJAX请求到服务器在window.unload事件。

I was having the same problem, where Chrome was not sending the AJAX request to the server in the window.unload event.

我只能够得到它的工作，如果请求是同步的。我能够使用jQuery做到这一点，在异步属性设置为错误

I was only able to get it to work if the request was synchronous. I was able to do this with Jquery and setting the async property to false:

$(window).unload(function () {

    $.ajax({
        type: 'GET',
        async: false,
        url: 'SomeUrl.com?id=123'
    });
});

以上code为我工作在IE9，Chrome浏览器19.0.1084.52男，和Firefox 12。

The above code is working for me in IE9, Chrome 19.0.1084.52 m, and Firefox 12.

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