Browers进入＆QUOT;忙QUOT;国家对Ajax请求 [英] Browers entering "busy" state on Ajax request

问题描述

我目前正在实施一种HTTP推送的使用长轮询不支持多部分Ajax响应浏览器。

I am currently implementing a sort of HTTP Push using Long Polling for browsers that don't support multipart ajax responses.

我不得不承认，在服务器端工作正常，我是relativly新的前端JavaScript开发，因此可能已经取得了一些明显的错误

I have to admit that while the server side is working fine, i am relativly new to front end javascript development, and thus may have made some obvious mistakes

现在的问题是如下LongPolling完美的作品在IE 6,7,8和Firefox（尽管Firefox使用多部分我与长轮询测试它太），但Safari和Chrome进入 在Ajax请求的浏览器的忙的状态。 （它们显示窗口等待光标，和Safari也显示在标题栏中的加载指示器）

The problem is as follows LongPolling works perfectly on IE 6,7,8 and Firefox ( even though Firefox uses multipart i tested it with long polling too ) but Safari and Chrome enter the browsers "busy" state during the ajax requests. ( they show the windows wait cursor, and Safari also shows its "Loading" indicator in the title bar )

这当然不是desireable ..

This is of course not desireable..

下面是我的code做基于jQuery 1.4.1长轮询：

Here is my code to do the long poll based on Jquery 1.4.1:

function MepSubscribeToQueueLongPoll(name, callback) {

    var queueUrl = MepGetQueueUrl(name, "LongPoll");
    MepLongPollStep(queueUrl, callback);
};

function MepLongPollStep(url, callback) {
    $.ajax({
        url: url,
        async: true,
        cache: false,
        success: function (data,status,request) {
            callback(request.responseText);
            MepLongPollStep(url, callback);
        }
    });
};

请注意，我绕过通过直接传递request.responseText回调解析的jQuery功能的数据因为jQuery似乎不支持多部分AJAX阶跃响应，我想成为整个通信路径是一致的。

Note that i am bypassing the data parsing functionality of Jquery by passing the request.responseText directly to the callback because Jquery does not seem to support multipart ajax respones and i wanted to be consistent across communication paths.

推荐答案

由于没有更好的答案已经走上前去，我不知道一个简单的超时可以解决这个问题。对不起，给一个猜测，而不是我知道这是真正的答案，但这实际上可能解决它：

Since no better answer has stepped forward, I wonder if a simple timeout would solve the problem. Sorry to give a "guess" instead of a "I know this to be true answer", but this might actually fix it.:

function MepLongPollStep(url, callback) {
    $.ajax({
        url: url,
        async: true,
        cache: false,
        success: function (data,status,request) {
            callback(request.responseText);
            window.setTimeout( function(){
              MepLongPollStep(url, callback);
            },10);
        }
    });
};

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