Ajax :: Handling Multiple Requests?
May 15, 2011
This might seem like a silly question..First issue. If i have a response and i'd like to update both text div and a status div how would i go about doing this. I've seen that jQuery has a few options such as OnSuccess etc?
Say that i post a comment and obviously you'd want to update some kinda statusbar on your website with the info that the message was posted successfully with ajax. (otherwise it might slip by the user unnoticed since ajax is kinda discrete)
Would it be a good way to for instance check the responseText if it contains anything and if it does you simply write a successmessage by grabbing a div from JS and if the responseText contains a custom error code lets say 1 you'll update the statusbar with a deny message?
Second thing. I've currently created an Ajax search on my site which activates whenever the user press or unleash the button. The issue is that if the user types fast enough it comes stuck showing the Loading.gif constantly. Could this be due so many requests opening and that i have a sleep on the server-side and if so how would you do it instead? I am using a serversleep of 1 second to have the Ajax pic appear consistently.
[Code]...
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Aug 19, 2011
I have a jsp page using ajax that has a button with an action. The action sends multiple ajax requests. The response from these requests is to be used to update a progress indicator to show the servers current progress. I can see from the debug that I am getting the 1st response. I think it is the way how I have implemented the further requests. I think this is down to my javascript knowledge, which isnt very much. Also I assume using multiple requests in this way is the correct thing to do? I have spent ages trawling the internet trying to get a solution.
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Apr 18, 2011
I'm encountering an AJAX problem when I try to execute multiple AJAX requests at the same time. What I want to do is delete a message and display the status (succes or failure) of that in div1, and refresh the messages on the page in div2. This needs (for as far as my knowledge reaches) two AJAX actions from which I both need the responseText.
The problem:
What happens when I execute my script is that the second action (refresh a part of the page) happens before the deletion is executed. The result of this is that when the deletion has been executed, the page is already updated, and the deleted message is still there.
The script
What I now have is:
function doAjax(url, element_id, img_url){
var ajaxObject = createAjaxObject();
ajaxObject.open('GET', url, true);
ajaxObject.onreadystatechange = function(){
if(ajaxObject.readyState==4 && ajaxObject.status==200){
document.getElementById(element_id).innerHTML = ajaxObject.responseText;
delete ajaxObject; .....
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Mar 18, 2009
I need to send 15 requests to my server and get results, these results are queries to other sites. I then update my page with the results. I need to know if I am taking the correct approach, as things are working a bit slow, and i.e., seems the be as slow as a snail.
Here is my function for the first request
Code:
function one(){
var xmlHttpa=null;
try{
xmlHttpa=new XMLHttpRequest();
} catch (e){
try {
xmlHttpa=new ActiveXObject("Msxml2.XMLHTTP");
} catch (e){
try {
xmlHttpa=new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {
alert("Your browser does not support AJAX!");
return false;
}}}
xmlHttpa.onreadystatechange=function(){
if(xmlHttpa.readyState==4){
document.getElementById('resulta').innerHTML = xmlHttpa.responseText;
var el = document.getElementById('showMessagea');
el.parentNode.removeChild(el);
applystyle();
}}
xmlHttpa.open("GET","one.php",true);
xmlHttpa.send(null);
}
I then call this function and others from my page, one(); two(); etc. Am I correct in my approach?
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May 11, 2011
I have a page that relies on AJAX for content manipulation. Once a person selects a radio button, a request is made through $.getJSON() to get the replacement content. This works in all browsers. Once the new content is loaded, there are 3 more calls to $.getJSON() to change more content (on other tabs in jQuery UI). This works in all browsers except for IE.
I understand this is a Microsoft problem, and not a jQuery problem, but I am wondering if there is a way to manipulate the jQuery calls to get them to work in IE. I did try replacing $.getJSON with $.ajax, and even set async to false. None of those three methods worked in IE. I noticed the problem when my loading div was still displayed in IE. Using Firebug Lite, I saw that only one request was made, rather than four.
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May 6, 2010
I have a problem where if a form submission (set up to submit via AJAX) fails validation, the next time the form is submitted, it doubles the number of post requests - which is definitely not what I want to happen. I'm using the jQuery ValidationEngine plugin to submit forms and bind validation messages to my fields. This is my code below. I think my problem is that I need to unbind from the validationEngine plugin when the form fails, but I can't figure out how to do this.
[Code]...
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Feb 9, 2009
I'm using AIR to write an application that is mostly javascript (I am using jquery for quite a lot of it). The program has to be able to download multiple HTML pages (like a RSS feed reader might) and take a specific action when the download is complete, depending on which page has just downloaded. I'm using air.URLLoader with an eventlistener to notify when the page download is complete. The problem I have is that I want to run through a database table of around 20-30 URLs and dynamically create URLLoaders for each.I've spent hours searching Google and looking for ways to overload the event listener, add a property to the URLLoader object etc but all to no avail.
The code above will load whatever pages it is told to, but the problem I have is that it needs to take different actions depending on which page is loading. Each page in the database table has an ID field and I need to somehow identify the ID of the page within the notifyURLComplete function, hence the reason I'd like to pass the page ID into the event listener (apparently not possible) or add an additional property to the URLLoader object.Another possibility was a custom event handler, but I'm not sure how/where this would be done in my code.
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Oct 14, 2006
I have an web application (PHP backend) where I want to initiate multiple requests to the same server (to different php functions/files) and asynchronously update the response on the page (the call back function is same for all the requests).
What is the best solution for this ? Is it better to
a) call multiple server calls from the java script file? if so Do we create multiple http objects ? can someone point me to the few examples ?
b) call one Php service and have the php fork the multiple requests on the server side. I am not sure if this can be done multiple requests be done asynchronously on the server side ? and if so how to dynamically update teh resultant page as each request finishes?
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May 14, 2009
It looks like IE is caching the response for some AJAX requests here. The app I'm working on is a catalog of sorts. Clicking the link for a category loads a set of "items". Those, in turn, may be deleted from the admin view. The delete works fine (I checked the DB) but, when loading the same set of category items, I'm seeing the list unchanged. That is, the thing that was deleted is still there. Sorry for the crap explanation but I'm not really sure of a better way of putting it. Bottom line is, has anyone seen this sort of behavior with IE before? Can it cache the result of an AJAX request like that? And, if so, how can I guard against that? Can I set cache-control headers for an AJAX request?
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Jan 12, 2009
I have this function among many that houses forms. I'm also using an ajax page that is supposed to deal with form's entries and insert everything into my DB and I don't know how to separate the different requests on the ajax page so that it can do what the correct request is.
[Code]...
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Apr 29, 2009
Very intermittently, I am finding ajax requests submitted with jquery are being submitted twice, once with parameters, and once without parameters. The code looks something like this:
[Code]...
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Feb 12, 2010
I'm trying to launch two ajax requests at same time. I'm expecting result from the first later than the second. The problem is, it won't return me any result from the second request untill first one is returned.
Check it out :
$.post("sendMail.php");
getSendInfo();
setTimeout(getSendInfo,5000);
[code]....
I'm getting response from the $.getJSON function only when the $.post is over. Is this a bug or a mistake from me ? My aim is to launch a long request and fire multiple other requests to check how is doing the first one.
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Jul 12, 2011
I need to encrypt my AJAX requests and responses from the server. As the message format I use simple JSON.Can you advise any libraries about it?
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Jul 20, 2005
I have a JSP page with several forms on it. Some of these forms are
generated dynamically, and each of them submits some information to a
database.
Handling one form is easy, as I can simply make the form post to
itself, and handle the
data using a single bean. Since I have multiple forms, I now have a
problem. Several of the forms on the page handle the same type of data
(same input names), and a 'setproperty *' call for each of the form
beans would change data in several beasn, not just the form/bean that
sent the data.
I am attempting to write a separate JSP with a single bean that
handles a form submission. However, I'm not sure how to make this page
go back to the referring page from which the data was submitted.
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Feb 26, 2006
I am trying to populate two select boxes with over hundred option elements for each. I have succeded in doing so but with a little problem. I make two xmlhttp calls one after another. What happens is that if the first call doesn't make it before the second, the data in the first select box fails to load and the second box succesfully loads data. I am new to the Ajax world but i am sure i am not doing it right.
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Oct 25, 2010
I'm having problems performing a simple load(...) request to bring in HTML content from a partner Oracle system within the same domain. Our portal has a built-in SO connection will handles security for me transparently. However during the process it initiates a 302 temporarily moved response which seems to trip up an AJAX request, but doesn't trip up Firefox when accessed through the address bar. If I use the same URL in an IFRAME it's totally fine.
After tons of googling, searching the forums, and the bug tracker database I cannot find anyone who has experienced this problem. Before I open a bug ticket I'd like community feedback to help me see if I am doing anything wrong.
My AJAX call looks like this in Javascript:
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Mar 26, 2010
I have a element when click, it will trigger some other elements to be selected. and those elements will trigger elements in next level.
It is a three levels hierarchy so to speak. but each element will send an ajax request when selected. Those requests will become out of control especially when I repeatedly click the root element.
Can I queue those XHR request in a queue and send them one by one? or maybe add a delay before send so that they can collect their information into one batch request and send one request after that.
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Jul 23, 2010
I am developing a fairly complicated application with a lot of JavaScript and making use of JQuery. The application repeatedly makes simultaneous GET requests.
I am looking for a way of assigning a unique token to each request when it is made, so that I can store information about that request and cache the request / response combo, when using $.get() (or potentially $.ajax() if required for the extra functionality).
So far I have not had any joy and after a while googling this am none the wiser. I have used similar functionality in Flex 3 with the AsyncToken object which can maintain data between HTTP request / response.
[Code]...
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Jan 8, 2010
If you've caught a mouse event (say, onmousemove) and you're currently in the process of handling that event, is it possible for that, or another, mouse event handler to get hit again, at the same time that you're handling the previous event? Or is it guaranteed that no additional events will actually call any of your event handlers until your code returns from handling the prior event? That is, is it strictly sequential processing, or can they occur simultaneously?
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Jan 29, 2011
I'm working on a php/jQuery application, I want to display a loading image automatically every ajax request, without writing code for every ajax request. Is there anyway to do this.
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Oct 3, 2011
When a pending ajax request is aborted in IE browsers there is a new global object called "jQuery" + timestamp, for example "jQuery16405272192696596443".
This happens in every IE from 6 to 9 but not in Chrome, Safari, FireFox in their current stable versions. I am a bit lost and found nothing similar. I created a little test page to determine whether it started due to some own code or just in this little piece.
Example HTML:
<!DOCTYPE html>
<html>
<head>
[Code].....
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Dec 24, 2010
This is the exemplar I've been using for my $.ajax requests to my php script.
$.ajax({ type: 'GET', url: 'getDetails.php', data: { id: 142 }, success: function(data) {
// grabbed some data! };
});
I'm working with a few more variables than this, I'm working with 3 variables. What I'm wondering is should I use json_encode() on the php side. I will be using php validations, so I may return error messages in an array. How do I check whether I have error messages or true value.
I'd like to send in an associative array so I can have email = "error"; amongst a few others. So if email is the only one with error I will .append a message to the correct div id.
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Dec 29, 2009
I am writing a form that grows using ajax server responses to info as the form is filled in and everything is fine in standards compliant browsers but IE is having a problem. I have two js functions on the page that collect form data, send it to the server, and then write the server response as innerHTML to specified divs on the page. This works great in FF but in IE it runs the first function but fails on the second function and the two functions are identical except for the server routine.
The div that is populated with the server response so it doesn't seem to be a problem with the coding because if one works, and they are identical, the other should work too so perhaps IE is choking with the way it is handling two ajax objects on the same page? You will need to add something to the shopping cart first at [uRL] and proceed to checkout, then on the checkout page look in the url and change ste_chkout_proc to ste_checkout_proc and load the new url to see the dev checkout vs. the live checkout.
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Nov 11, 2011
I'm trying to load some html content into a page via the ajax .load() method (wrapped within the $(document).ready() function).After I execute this, I'd like to bind all new span elements from the loaded content to a context menu plugin like this:
$("#selector").contextMenu({
menu: ''myMenu''
},
[code]....
Unfortunately since the span elements are coming from the ajax request,I don't think I can bind a normal event handler as per the plugin. [URL] how to use event bubbling in this situation.
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Jul 23, 2005
how do I know when the browser is making a request to the server? I am
not having an onclick event for EVERY hyperlink, submit, etc. There
must be some javascript function that I can overwrite that will allow
me to do something when the browser requests something from the server.
My plan is whenever a browser is about to request something from the
server to create a time stamp and then compare this time to the time
when the page returns from the server. This will allow me to measure
performance.
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Feb 14, 2006
Say I wrote an ajax script to send out HTTP requests via ajax. Any
cookies that I have associated with that site will be sent along with
this HTTP request. Is there a way to prevent this from happening? I
tried the following to no avail:
http.setRequestHeader('Cookie','');
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