jQuery Keyup Ajax请求：杀死以前的请求 [英] jQuery Keyup Ajax Request: Kill previous requests

问题描述

我有一个脚本在我的搜索输入框上的keyup事件上执行ajax请求。我在Firefox中注意到（我正在查看控制台）每个被发送的请求都会完成。所以有大量的ajax请求发生。

I have a script that does an ajax request out on a keyup event on my search input box. I am noticing in Firefox (I am looking at the console) that every request that is sent off finishes. So there are a ton of ajax requests that happen.

在keyup事件中是否有杀死正在进行的ajax请求？

Is there anyway to kill an ajax request in progress upon a keyup event?

jQuery：

jQuery(function() {
  var request;
  request = function(url, keyword) {
    return $.post('/backpack/' + url + '/search?keyword=' + keyword, function(data) {
      var el;
      el = "#result_" + url;
      return $(el).html(data);
    });
  };
  $("#search_text").bind("keyup", function() {
    var query, url, _i, _len, _ref;
    query = $(this).val();
    if (query.length > 2) {
      _ref = ['tracks', 'albums', 'artists'];
      for (_i = 0, _len = _ref.length; _i < _len; _i++) {
        url = _ref[_i];
        request(url, query);
      }
      return $("#search_suggestions").show();
    } else {
      return $("#search_suggestions").hide();
    }
  });
  return $("#suggestion_all_results").bind("click", function() {
    return $('#search_form form').submit();
  });
});

推荐答案

这已在这里的第三方 - 授权线程。

简答：它返回一个XHR对象，你可以调用 abort（）

Short answer: it returns an XHR object and you can call abort()

如果你在发送密钥事件时，您可能还会考虑添加延迟;这对你的服务器来说是一个相当大的负荷，所以等到你打扰事件之前等待几秒钟之间的暂停。

If you are sending on keyup events, you might also think about adding a delay; it's going to be a pretty big load on your server, so wait for a pause of a few seconds between strokes before you bother kicking off the event.

正如Erv Walter所说在上面的线程的评论中：值得注意的是，如果服务器已经收到请求，它可能会继续处理请求（取决于服务器的平台），即使浏览器不再监听响应。没有可靠的通过处理正在进行的请求使Web服务器停止运行的方法。

As Erv Walter said in the above thread's comments: "Of note, if the server has already received the request, it may continue processing the request (depending on the platform of the server) even though the browser is no longer listening for a response. There is no reliable way to make the web server stop in its tracks with processing a request that is in progress."

我遇到了同样的问题，做了ajax建议查找;）

I've run into the same issues doing ajax suggest lookups ;)

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