I have a problem, when submitting a form all active ajax request fail, and that triggers error event.
How to stop all active ajax requests in jQuery without trigerring error event?
转载于:https://stackoverflow.com/questions/1802936/stop-all-active-ajax-requests-in-jquery
Every time you create an ajax request you could use a variable to store it:
var request = $.ajax({
type: 'POST',
url: 'someurl',
success: function(result){}
});
Then you can abort the request:
request.abort();
You could use an array keeping track of all pending ajax requests and abort them if necessary.
Here's what I'm currently using to accomplish that.
$.xhrPool = [];
$.xhrPool.abortAll = function() {
_.each(this, function(jqXHR) {
jqXHR.abort();
});
};
$.ajaxSetup({
beforeSend: function(jqXHR) {
$.xhrPool.push(jqXHR);
}
});
Note: _.each of underscore.js is present, but obviously not necessary. I'm just lazy and I don't want to change it to $.each(). 8P
I had some problems with andy's code, but it gave me some great ideas. First problem was that we should pop off any jqXHR objects that successfully complete. I also had to modify the abortAll function. Here is my final working code:
$.xhrPool = [];
$.xhrPool.abortAll = function() {
$(this).each(function(idx, jqXHR) {
jqXHR.abort();
});
};
$.ajaxSetup({
beforeSend: function(jqXHR) {
$.xhrPool.push(jqXHR);
}
});
$(document).ajaxComplete(function() {
$.xhrPool.pop();
});
I didn't like the ajaxComplete() way of doing things. No matter how I tried to configure .ajaxSetup it did not work.
The following snippet allows you to maintain a list (pool) of request and abort them all if needed. Best to place in the <HEAD> of your html, before any other AJAX calls are made.
<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) $.xhrPool.splice(i, 1); // removes from list by index
}
});
})
</script>
Using ajaxSetup is not correct, as is noted on its doc page. It only sets up defaults, and if some requests override them there will be a mess.
I am way late to the party, but just for future reference if someone is looking for a solution to the same problem, here is my go at it, inspired by and largely identical to the previous answers, but more complete
// Automatically cancel unfinished ajax requests
// when the user navigates elsewhere.
(function($) {
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);
Give each xhr request a unique id and store the object reference in an object before sending. Delete the reference after an xhr request completes.
To cancel all request any time:
$.ajaxQ.abortAll();
Returns the unique ids of canceled request. Only for testing purposes.
Working function:
$.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;
}
};
})();
Returns an object with single function which can be used to add more functionality when required.
Just as important: say you want to log off and you are generating new requests with timers: because session data is renewed with each new bootstrap (maybe you can tell I am talking Drupal, but this could be any site that uses sessions)... I had to go through all my scripts with a search and replace, cause I had a ton of stuff running in different cases: global variables at the top:
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');
}
I have updated the code to make it works for me
$.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);
}
}
});
Here's how to hook this up on any click (useful if your page is placing many AJAX calls and you're trying to navigate away).
$ ->
$.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()
Throwing my hat in. Offers abort and remove methods against the xhrPool array, and is not prone to issues with ajaxSetup overrides.
/**
* 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);
});
Better to use independent code.....
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++]);
}
};
Make a pool of all ajax request and abort them.....
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++]);
}
};
I found it too easy for multiple requests.
step1: define a variable at top of page:
xhrPool = []; // no need to use **var**
step2: set beforeSend in all ajax requests:
$.ajax({
...
beforeSend: function (jqXHR, settings) {
xhrPool.push(jqXHR);
},
...
step3: use it whereever you required:
$.each(xhrPool, function(idx, jqXHR) {
jqXHR.abort();
});