在jQuery中停止所有活动的ajax请求

时间:2009-11-26 10:42:23

标签: jquery ajax

我遇到问题,提交表单时所有活动的ajax请求都失败,并触发错误事件。

如何在jQuery中停止所有活动的ajax请求而不会发生错误事件?

16 个答案:

答案 0 :(得分:261)

每次创建ajax请求时,都可以使用变量来存储它:

var request = $.ajax({
    type: 'POST',
    url: 'someurl',
    success: function(result){}
});

然后你可以中止请求:

request.abort();

您可以使用数组跟踪所有待处理的ajax请求,并在必要时中止它们。

答案 1 :(得分:180)

以下代码段允许您维护请求的列表(),并在需要时将其全部中止。最好放在html的<HEAD>之前进行任何其他AJAX调用。

<script type="text/javascript">
    $(function() {
        $.xhrPool = [];
        $.xhrPool.abortAll = function() {
            $(this).each(function(i, jqXHR) {   //  cycle through list of recorded connection
                jqXHR.abort();  //  aborts connection
                $.xhrPool.splice(i, 1); //  removes from list by index
            });
        }
        $.ajaxSetup({
            beforeSend: function(jqXHR) { $.xhrPool.push(jqXHR); }, //  annd connection to list
            complete: function(jqXHR) {
                var i = $.xhrPool.indexOf(jqXHR);   //  get index for current connection completed
                if (i > -1) $.xhrPool.splice(i, 1); //  removes from list by index
            }
        });
    })
</script>

答案 2 :(得分:118)

使用 ajaxSetup is not correct ,如其文档页面所述。它只设置默认值,如果某些请求覆盖它们,则会出现问题。

我迟到了,但是如果有人正在寻找同一问题的解决方案,那么只是为了将来的参考,这是我的目标,受到启发并与之前的答案大致相同,但更完整

// Automatically cancel unfinished ajax requests 
// when the user navigates elsewhere.
(function($) {
  var xhrPool = [];
  $(document).ajaxSend(function(e, jqXHR, options){
    xhrPool.push(jqXHR);
  });
  $(document).ajaxComplete(function(e, jqXHR, options) {
    xhrPool = $.grep(xhrPool, function(x){return x!=jqXHR});
  });
  var abort = function() {
    $.each(xhrPool, function(idx, jqXHR) {
      jqXHR.abort();
    });
  };

  var oldbeforeunload = window.onbeforeunload;
  window.onbeforeunload = function() {
    var r = oldbeforeunload ? oldbeforeunload() : undefined;
    if (r == undefined) {
      // only cancel requests if there is no prompt to stay on the page
      // if there is a prompt, it will likely give the requests enough time to finish
      abort();
    }
    return r;
  }
})(jQuery);

答案 3 :(得分:36)

以下是我目前正在使用的内容。

$.xhrPool = [];
$.xhrPool.abortAll = function() {
  _.each(this, function(jqXHR) {
    jqXHR.abort();
  });
};
$.ajaxSetup({
  beforeSend: function(jqXHR) {
    $.xhrPool.push(jqXHR);
  }
});

注意:_.each of underscore.js存在,但显然不是必需的。我只是懒惰而且我不想把它改成$ .each()。 8P

答案 4 :(得分:17)

为每个xhr请求提供唯一的ID,并在发送之前将对象引用存储在对象中。 xhr请求完成后删除引用。

随时取消所有请求:

$.ajaxQ.abortAll();

返回已取消请求的唯一ID。仅用于测试目的。

工作职能:

$.ajaxQ = (function(){
  var id = 0, Q = {};

  $(document).ajaxSend(function(e, jqx){
    jqx._id = ++id;
    Q[jqx._id] = jqx;
  });
  $(document).ajaxComplete(function(e, jqx){
    delete Q[jqx._id];
  });

  return {
    abortAll: function(){
      var r = [];
      $.each(Q, function(i, jqx){
        r.push(jqx._id);
        jqx.abort();
      });
      return r;
    }
  };

})();

返回具有单个函数的对象,可用于在需要时添加更多功能。

答案 5 :(得分:14)

我发现多次请求太容易了。

第1步:在页面顶部定义变量:

  xhrPool = []; // no need to use **var**

step2:在所有ajax请求中设置beforeSend:

  $.ajax({
   ...
   beforeSend: function (jqXHR, settings) {
        xhrPool.push(jqXHR);
    },
    ...

第3步:在您需要的时候使用它:

   $.each(xhrPool, function(idx, jqXHR) {
          jqXHR.abort();
    });

答案 6 :(得分:5)

我和安迪的代码有些问题,但它给了我一些很棒的想法。第一个问题是我们应该弹出任何成功完成的jqXHR对象。我还必须修改abortAll函数。这是我最后的工作代码:

$.xhrPool = [];
$.xhrPool.abortAll = function() {
            $(this).each(function(idx, jqXHR) {
                        jqXHR.abort();
                        });
};
$.ajaxSetup({
    beforeSend: function(jqXHR) {
            $.xhrPool.push(jqXHR);
            }
});
$(document).ajaxComplete(function() {
            $.xhrPool.pop();
            });

我不喜欢ajaxComplete()做事的方式。无论我如何尝试配置.ajaxSetup,它都无法正常工作。

答案 7 :(得分:5)

我将mkmurray和SpYk3HH的答案扩展到上面,以便xhrPool.abortAll可以中止给定网址的所有待处理请求

$.xhrPool = [];
$.xhrPool.abortAll = function(url) {
    $(this).each(function(i, jqXHR) { //  cycle through list of recorded connection
        console.log('xhrPool.abortAll ' + jqXHR.requestURL);
        if (!url || url === jqXHR.requestURL) {
            jqXHR.abort(); //  aborts connection
            $.xhrPool.splice(i, 1); //  removes from list by index
        }
    });
};
$.ajaxSetup({
    beforeSend: function(jqXHR) {
        $.xhrPool.push(jqXHR); //  add connection to list
    },
    complete: function(jqXHR) {
        var i = $.xhrPool.indexOf(jqXHR); //  get index for current connection completed
        if (i > -1) $.xhrPool.splice(i, 1); //  removes from list by index
    }
});
$.ajaxPrefilter(function(options, originalOptions, jqXHR) {
    console.log('ajaxPrefilter ' + options.url);
    jqXHR.requestURL = options.url;
});

用法相同,但abortAll现在可以选择接受一个url作为参数,并且只取消对该url的待处理调用

答案 8 :(得分:4)

我已更新代码以使其适合我

$.xhrPool = [];
$.xhrPool.abortAll = function() {
    $(this).each(function(idx, jqXHR) {
        jqXHR.abort();
    });
    $(this).each(function(idx, jqXHR) {
        var index = $.inArray(jqXHR, $.xhrPool);
        if (index > -1) {
            $.xhrPool.splice(index, 1);
        }
    });
};

$.ajaxSetup({
    beforeSend: function(jqXHR) {
        $.xhrPool.push(jqXHR);
    },
    complete: function(jqXHR) {
        var index = $.inArray(jqXHR, $.xhrPool);
        if (index > -1) {
            $.xhrPool.splice(index, 1);
        }
    }
});

答案 9 :(得分:3)

投入我的帽子。针对abort数组提供removexhrPool方法,并且不会出现ajaxSetup覆盖问题。

/**
 * Ajax Request Pool
 * 
 * @author Oliver Nassar <onassar@gmail.com>
 * @see    http://stackoverflow.com/questions/1802936/stop-all-active-ajax-requests-in-jquery
 */
jQuery.xhrPool = [];

/**
 * jQuery.xhrPool.abortAll
 * 
 * Retrieves all the outbound requests from the array (since the array is going
 * to be modified as requests are aborted), and then loops over each of them to
 * perform the abortion. Doing so will trigger the ajaxComplete event against
 * the document, which will remove the request from the pool-array.
 * 
 * @access public
 * @return void
 */
jQuery.xhrPool.abortAll = function() {
    var requests = [];
    for (var index in this) {
        if (isFinite(index) === true) {
            requests.push(this[index]);
        }
    }
    for (index in requests) {
        requests[index].abort();
    }
};

/**
 * jQuery.xhrPool.remove
 * 
 * Loops over the requests, removes it once (and if) found, and then breaks out
 * of the loop (since nothing else to do).
 * 
 * @access public
 * @param  Object jqXHR
 * @return void
 */
jQuery.xhrPool.remove = function(jqXHR) {
    for (var index in this) {
        if (this[index] === jqXHR) {
            jQuery.xhrPool.splice(index, 1);
            break;
        }
    }
};

/**
 * Below events are attached to the document rather than defined the ajaxSetup
 * to prevent possibly being overridden elsewhere (presumably by accident).
 */
$(document).ajaxSend(function(event, jqXHR, options) {
    jQuery.xhrPool.push(jqXHR);
});
$(document).ajaxComplete(function(event, jqXHR, options) {
    jQuery.xhrPool.remove(jqXHR);
});

答案 10 :(得分:2)

制作所有ajax请求的池并中止它们.....

var xhrQueue = []; 

$(document).ajaxSend(function(event,jqxhr,settings){
    xhrQueue.push(jqxhr); //alert(settings.url);
});

$(document).ajaxComplete(function(event,jqxhr,settings){
    var i;   
    if((i=$.inArray(jqxhr,xhrQueue)) > -1){
        xhrQueue.splice(i,1); //alert("C:"+settings.url);
    }
});

ajaxAbort = function (){  //alert("abortStart");
    var i=0;
    while(xhrQueue.length){ 
        xhrQueue[i++] .abort(); //alert(i+":"+xhrQueue[i++]);
    }
};

答案 11 :(得分:1)

最好使用独立代码.....

var xhrQueue = []; 

$(document).ajaxSend(function(event,jqxhr,settings){
    xhrQueue.push(jqxhr); //alert(settings.url);
});

$(document).ajaxComplete(function(event,jqxhr,settings){
    var i;   
    if((i=$.inArray(jqxhr,xhrQueue)) > -1){
        xhrQueue.splice(i,1); //alert("C:"+settings.url);
    }
});

ajaxAbort = function (){  //alert("abortStart");
    var i=0;
    while(xhrQueue.length){ 
        xhrQueue[i++] .abort(); //alert(i+":"+xhrQueue[i++]);
    }
};

答案 12 :(得分:0)

同样重要:说你要注销并且你正在使用计时器生成新的请求:因为会话数据与每个新的引导程序一起更新(也许你可以告诉我说的是Drupal,但这可能是任何使用会话的站点)...我必须通过搜索和替换来查看我的所有脚本,因为我在不同情况下运行了大量的东西:顶部的全局变量:

var ajReq = [];
var canAj = true;
function abort_all(){
 for(x in ajReq){
    ajReq[x].abort();
    ajReq.splice(x, 1)
 }
 canAj = false;
}
function rmvReq(ranNum){
 var temp = [];
 var i = 0;
 for(x in ajReq){
    if(x == ranNum){
     ajReq[x].abort();
     ajReq.splice(x, 1);
    }
    i++;
 }
}
function randReqIndx(){
 if(!canAj){ return 0; }
 return Math.random()*1000;
}
function getReqIndx(){
 var ranNum;
 if(ajReq.length){
    while(!ranNum){
     ranNum = randReqIndx();
     for(x in ajReq){
    if(x===ranNum){
     ranNum = null;
    }
     }
    }
    return ranMum;
 }
 return randReqIndx();
}
$(document).ready(function(){
 $("a").each(function(){
    if($(this).attr('href').indexOf('/logout')!=-1){          
     $(this).click(function(){
    abort_all();                 
     });
    }
 })
});
// Then in all of my scripts I wrapped my ajax calls... If anyone has a suggestion for a 
    // global way to do this, please post
var reqIndx = getReqIndx();
if(reqIndx!=0){
ajReq[reqIndx] = $.post(ajax, { 'action': 'update_quantities', iids:iidstr, qtys:qtystr },  
function(data){
 //..do stuff
 rmvReq(reqIndx);
 },'json');
}

答案 13 :(得分:0)

var Request = {
    List: [],
    AbortAll: function () {
        var _self = this;
        $.each(_self.List, (i, v) => {
            v.abort();
        });
    }
}
var settings = {
    "url": "http://localhost",
    success: function (resp) {
        console.log(resp)
    }
}

Request.List.push($.ajax(settings));

只要您想中止所有ajax请求,只需调用此行

Request.AbortAll()

答案 14 :(得分:0)

有一个虚拟的解决方案,我用它来中止所有的ajax请求。此解决方案是重新加载整个页面。如果您不希望为每个ajax请求分配一个ID,并且在for循环内发出ajax请求,则此解决方案很好。这将确保所有ajax请求都被杀死。

location.reload();

答案 15 :(得分:-3)

以下是如何在任何点击时将其连接起来(如果您的页面放置了许多AJAX调用并且您正试图离开,则非常有用)。

$ ->
    $.xhrPool = [];

$(document).ajaxSend (e, jqXHR, options) ->
    $.xhrPool.push(jqXHR)

$(document).ajaxComplete (e, jqXHR, options) ->
    $.xhrPool = $.grep($.xhrPool, (x) -> return x != jqXHR);

$(document).delegate 'a', 'click', ->
    while (request = $.xhrPool.pop())
      request.abort()