Ajax Synchronous Request - Page Refresh And The Error
Dec 12, 2009
I have been using asynchronous requests for a long time. so the response was processed in a callback function. I thought of not using async so i made synchronous requests. The reason is that i dont have to have two more lines for checking the status and the onreadystatechange.... my synchronous requests would be like this...
[Code]....
so from the code you can understand that there is no need of a callback function and if conditions to check ready state... ... So there is no problem in the above code. The problem araises here... if i press the F5 (refresh) key or do a page refresh when the process is waiting for the response i get an (NS ERROR - firefox ( i have not yet checked that in IE browsers) (javascript error) though the process completes successfully. why?
Do we have to check whether the page is navigating away while in synchronous operation and abort the request? or what could be the reason for the error. This will not happen in async requests because that is also the reason for async...
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May 31, 2007
An experiment i'm doing requires requires a synchronous cross-domain
request, without using a proxy. I wondered if anyone had any ideas to
help me achieve this.
Below is what I have tried, including my conclusions/assumptions
(which i'll happily be corrected on if it solves my problem!):
The requirement not to use a proxy means I can't use the synchronous
mode of XMLHttpRequest, as it will not let me go cross-domain.
On-demand loading of javascript enables me to achieve the cross-domain
request by loading javascript of the form:
callback(data);
which on loading calls callback(), but it is not obvious how to make
this synchronous. I've also managed to get the same effect using a
hidden IFRAME, but again it relies on a callback. Is there a good way
to wrap/transform this in to a synchronous request? Code:
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Apr 15, 2010
So my problem is that i can't send form data in FF without page refresh (though in IE7-8 everything works smoothly).
My code fragments:
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Oct 24, 2010
I want to make a page which loads the div's with ajax The html code of the page is
Code:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
//styles and other script code
<script language="javascript" src="../js/intro.js"></script>
</script>
[Code]....
Now the problem is that javascript "freezes" and setInterval does not work.. Is there any solution to load the files order such i have it in code one-by-one and run the message function?
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Oct 1, 2009
I'm using an .ajax() call to do a jsonp request to another domain. When the user is not logged in, however, the server will return a 401 error. Unfortunately, this causes my .ajax() call to fail _without_ calling the error callback. Is this a known bug? Here is my code:
[Code]...
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Feb 8, 2010
I'm making this ajax call:
Code:
url = "/GeoAdaptaApp/geoLogger/logGuiEvents?json="+aLotOfJSONStuff;
encUrl = encodeURI(url,"UTF-8");
new Ajax.Request(encUrl, {
method: 'get',
onSuccess: this.sendQueueToServerSuccess( this,logConsole ),
[Code]...
The JSON string seems correct (I checked it with a validator) and it worked on an Ajax.updater (but i need a request now). Firefox keeps telling me:
[Code]...
The call always end up in the onFailure block. Full request here: [URL] It's very strange, Is there a better way to pass json objects to the server?
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Apr 13, 2011
I have the below code:
<script type="text/javascript">
function loadQuickMessageCheck(File,ID){
var xmlhttp;
[code]....
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Mar 24, 2009
I am facing some problem with this when i am trying to sent the data in krnlAddComment1.asp page and there is only an insert query exists. after run the query successfully, response.write "...." revert back to me
if ((myname != null) && (comm != null) && (captcha1 == randomnum))
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Aug 4, 2011
I have a webpage that makes a request to my server to get news posts. The request is made by using $.ajax(). If I change the page (e.g. click on a link) before the request is returned, the onerror handler gets called, raising an error! Any idea why is this happening? For your information, when onerror gets called, the 'xhr' and 'errorThrown' parameters are 'undefined' and the 'status' parameter contains the value 'error' (which I produced using JavaScript's alert).
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Aug 29, 2009
I want to build a form that work on one page only, to subtract the PHP pages for getting the data from all my web forms, I tried to pass the parameters to the same page but it dosent work.
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Apr 20, 2009
I have an ajax call that I want to display an ajax loader image before it makes the call and then hide that image after it completes the call. The below code is working fine in FF. But when the code is run in IE, for some reason the ajax call is made first and then the image isn't displayed until after the ajax call has completed. I've tried putting the .show() method before the ajax call and even in the beforeSend option of the ajax call, for some reason IE STILL makes the ajax call, and waits for it to complete, before it displays the image.
[Code]...
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Dec 18, 2009
Is there a code to auto refresh the page if 503 apache error message appear ?
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May 22, 2002
I have a VERY simple script to reload a page with fresh values when the value of a scroll menu changes. Trouble is, of course, NN 4.- freaks and closes the browser when this runs. No error warning, no error log?
The line..
<select name="Country" size="1" onChange="repopmenu(this,17)">
The script..
<script language="JavaScript">
<!--
function repopmenu(which,key)
{
n = which.value;
var url = ("eventedit.asp?country=" + n + "&key=" + key)
location.href = url;
}
//-->
</script>
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Dec 19, 2009
is there a code to auto refresh the page if 503 apache error message appear ?
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Feb 22, 2011
I'm trying to make a little loop that in each itteration executes a little php script to send mail with the mail() function. the php script returns either succes or failure. Now its my intention to append that msg to a div, after every execution.
$.ajax({
type: "POST",
data: dataString2,
url: "sendmail.php",
async: false,
success: function(result)
{
showStatus(result);
[Code]...
the show status(result) is nothing more then a .append(result) the zenMails(y) calls this function again to send the next mail. It does work though but it only updates the div after the entire loop is done, i 'ld think it ld do so after every execution since i call the showstatus when the synchronous call is done and only after that i call the next iteration. Is there anyway to work aroud this ? (making the call assync doesnt work , because the port for sending the mail would still be in use)
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Aug 26, 2010
When I try to fetch a page asyncronously I get a status 0 and the response text is empty: PHP Code:
var loaderImage = document.getElementById("loader");
loaderImage.style.display = "inline";
xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState==4 && xmlhttp.status == 200) {
response = xmlhttp.responseText;
alert(response);
[Code]....
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Jun 2, 2009
I worked with now in jQuery. Property however at present the following problem: [i]I provide a AJAX Request. the side is loaded, the parameters all conveyed and back receives I a complete HTML side. Now I would like to have only certain elements however from this side, like DIV, SPAN etc. How can I make with the AJAX Request return in such a way best, which I can select these elements thereby? Simply it would be unfortunately not functioned over the function $ (element), it even if I indicate the HTML Request as secondly parameter.[/i] Excused, for my bad English. ;-) Translatertool. There is unfortunately too many words, in order to describe my problem. ^^
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Oct 16, 2010
I have a php page which returns a table representing a query sent to a MySQL database. So far it has worked in every case except now that I'm trying to use it to call a stored procedure, in which case the readystate is staying at 1 and never completing.
I have logged the results of the php file both in an error log and looked at the response from the request using firebug, both of which show a correct result.
Why isn't this returning properly?
Here are the relevant javascript functions:
Code:
function customizeType()
{
$("custom-header").innerHTML = "";
$("custom-top").innerHTML = "";
[Code]....
After the page loads, the error log shows correct results for all queries.
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Sep 10, 2011
i want to reload page using ajax or jquery
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Apr 7, 2011
I have a very simple php page that uses shell_exec to get some basic stats for my LAMP. I currently have it setup to where it uses a javascript refresh every 60 seconds, but would like to setup AJAX to have it so it doesnt actually refresh the page. I am new to javascript/ajax so I am a little lost, here is my code
[Code]....
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Apr 5, 2009
I have a simple chat on a web page, but It wont refresh itself unless the user refreshes the whole page and I cannot force the page to totally refresh itself cause that would mess up the other things the user can do on the site. So I would need to make the DIV to "load itself again in for example 3sec". I believe this is quite common thing to construct, how to construct this?
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Apr 1, 2011
I have a php webpage that has a single input box. When ever an item is entered and the Submit button is pressed, the entry is added to a database. Additionally, the database table contents are read and printed directly below the input box and the submit button on the same page, using AJAX. Now, I have decided to add additional functionality to the page. I want a delete button for each entry displayed in the table below. For any button that is pressed, I want to delete that entry from the database.
Here's the problem: I want the database table contents that has been printed below to reflect this change. I can achieve the delete, but in order to show the change in content caused by the delete, the table below must either be replaced or updated via ajax. How can I achieve this? I have been trying to follow these examples using jQuery and Mootools respectively, but I've been having no luck. [URL] I don't want all the fancy looks, I just want the core functionality.
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Jan 4, 2010
I am showing recent visitors on profile page.The most recent visitor would be "1 min ago".If suddenly new user comes so i just want to append that user with the message "about a min ago" without refreshing the page.
ex- suppose my recent visitors list ll be like this-
And now smita comes as the recent most visitor i want to append her name in to this list without refreshing the the entire page like this
I know i can do this with AJAX. I have searching around the net for the any helpful resource but didn't get anything yet.
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Mar 2, 2009
I have made a page thats makes an AJAX call to the server gets the time and displays it. In the OPEN method i have set
req.open("GET","/timerProg.cgi?param1="+new date(),false);
I have set the last parameter as false as i am expecting a synchronous request so that time displayed should be consistent.
I am using new date() since the browser is caching my request and displaying the same output everytime as i dont know any other alternative.
The alternative so that browser does not cache the results and gives proper output each time.
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Mar 4, 2010
I have an error when I POST to a page. Whatever monetary choice of donation that is made, the POST does not work to send the values to the next page and the default value of $20.00 is registered.
After looking at my code for a day I dont see the errorL
Here is the code
Contributions are tax deductible for residents of the United States and Jamaica.
Yes, I want to become a contributor. Please accept my donation as indicated below.
[/code]
Here is the test site. [url]
For this test all menu choices takes to the Donation page.
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Apr 11, 2010
i'm trying to get a JSON-request from this API: h
[Code]...
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