由网友(原来，只是我自导自演)分享简介：有没有一种简单的方法来检测是否XMLHtt prequest是活跃在浏览器窗口？或者，有多少是活跃的？ IE浏览器。有没有一种方法来检测是否有任何的AJAX在浏览器窗口中把活动？Is there an easy way to detect if an XMLHttpRequest is active in the b...

有没有一种简单的方法来检测是否XMLHtt prequest是活跃在浏览器窗口？或者，有多少是活跃的？ IE浏览器。有没有一种方法来检测是否有任何的AJAX在浏览器窗口中把活动？

Is there an easy way to detect if an XMLHttpRequest is active in the browser window? Or how many are active? ie. Is there a way to detect if there are any AJAX calls active in my browser window?

扩展的问题：使用JavaScript是有办法，我可以看到，如果任何XMLHtt prequests是开放的？如window.XMLisActive（）或类似的东西？

Extension of question: Using javascript is there a way I can see if any XMLHttpRequests are open? Such as "window.XMLisActive()" or something like that?

解决方案：最后写一个包装XMLHtt prequest https://gist.github.com/1820380

Solution: Ended up writing a wrapper for XMLHttpRequest https://gist.github.com/1820380

推荐答案

有没有一种方法来检测从JS打开的连接，除非你写一个包装 XmlHtt prequest （或猴子补丁吧），其跟踪打开的连接。

There is not a way to detect an open connection from JS unless you write a wrapper for XmlHttpRequest (or monkey patch it) that keeps track of opened connections.

下面是kidcapital的猴子补丁，不知道它是完美的，但它是一个良好的开端

Here's kidcapital's monkey patch, not sure if it's perfect, but it's a good start

  (function() {
    var oldOpen = XMLHttpRequest.prototype.open;
    window.openHTTPs = 0;
    XMLHttpRequest.prototype.open = function(method, url, async, user, pass) {
      window.openHTTPs++;
      this.addEventListener("readystatechange", function() {
          if(this.readyState == 4) {
            window.openHTTPs--;
          }
        }, false);
      oldOpen.call(this, method, url, async, user, pass);
    }
  })();