I have an ajax function that loads within a setInterval as follow :
setInterval(function(){updateChart()}, 5000);
var updateChart = function(){
$.ajax({
url: './script.php',
type: 'post',
dataType: 'json',
cache: false,
data: {'candlesData':candlesData},
success: function(data) {
//alert(data);
//console.log("two");
//console.log(data);
gotData(data);
delete data;
delete candlesData;
},
error: function(xhr, desc, err) {
//console.log(xhr);
//console.log("Details: " + desc + "\nError:" + err);
}
}).done(function() {
});;// end ajax call
}
My browser memory gets SIGNIFICANTLY bigger over time. I tried to diagnose and found out that the POST request in the AJAX data (candlesData) is cached everytime... You can see this in the screenshot (retained data column).
I tried everything to clear the cache but it is not working.
Snapshot of retained data
I fixed this problem.
And I confirm that ajax post doesn't store cache...
The problem was that I had a javascript object which was recreated every time with setInterval function. I used :
objectName.destroy()
that get triggered everytime it reload the function and it resolved the problem.
Related
I'm trying to figure out what is Adobe Coldfusion and how to work on this platform.
I'm stuck at simple issue.
On submit I send form with jQuery ajax to server.
But I got response: 500 (Element MY_VAR is undefined in FORM.)
What I'm doing wrong?
JS
$loginForm.on('submit', function(e) {
e.preventDefault();
var formData = new FormData(e.target);
$.ajax({
url: 'test.cfm',
method: 'POST',
cache: false,
processData: false,
data: formData,
error: function(err) {
console.log(err);
},
success: function(data, status) {
console.log(status);
console.log(data);
}
});
});
CF
<cfoutput>
<p>#form.myvar#</p>
</cfoutput>
500 indicates an internal server error.
Are you trying to display your form values after sending them?
Maybe try and use the cfdump tag. Very useful for debugging.
Try dumping the form scope and see what variables are actually in there.
I wanted to retrieve data using ajax, when open the url in browser it showing data but when i execute this url in ajax code error msg function is running however data is showing in browser.
url: "http://live.nayatel.com/?json=1"
$(document).ready(function() {
$.ajax({
type: "GET",
url: "http://live.nayatel.com/?json=1",
cache: false,
success: onSuccess,
error: onError
});
});
its a wordpress site and i used a plugin to retrive its data working in browser but not giving response text.
I have two suggestions, since I am not that sure about your problem.
a) Try changing
success: onSuccess,
to
success: function(data, status) {
onSuccess(data, status);
},
b) If that fails, try adding
crossDomain: true,
I'm developing a Phonegap based app which shows some data that is stored in a remote server. How can I make it refresh data every certain time in case an error happened and it didn't get the data the first time?
this is the list.js
$(document).ready(function(){
var output = $('#vehiculosOutput');
$.ajax({
url: 'http://www.periodicosonofertas.com/mobile/conexVehiculos.php',
dataType: 'jsonp',
jsonp: 'jsoncallback',
timeout: 5000,
success: function(data, status){
$.each(data, function(i,item){
var landmark = '<li>'+item.name + '<p></p>'
+ '<p><font style="white-space:normal; font-size: small" >'+item.descripcion+'</p>' + '<p>'+item.contacto+'</p>' + '<p>'+item.telefono+'</p>' + '<p>'+item.correo+'</p><p>'+status+'</p></li>';
output.append(landmark);
});
},
error: function(){
output.text('Error');
//setTimeout(func.updateStatus, 1000);
}
});
});
You can use long polling for this. In case if you haven't heard about it, this is a good place to start.
If you need to resend the request only in error case, the following snippet would work.
(function poll(delay){
setTimeout(function(){
$.ajax({
url: "http://127.0.0.1:8000/time/",
success: function(data){
$('#requiredDivId').text(data.value);
},
error: function(data){
//Recursive **Poll**
poll(30000);
},
dataType: "json"
});
}, delay);
})(0);
If you want to go with specific feature you mentioned in your comment then there is a function named network.isReachable(You can find more details here) in phonegap. You can put that function to check whether connection is on or not within settimeout function and if its true then you can run function to send data to server.
I hope it'll help you
I have come across a peculiar item in JQuery that I am hoping somebody can help me to understand.
I've spent much of the day trying to get JQUERY's AJAX 'success' function to be raised when returning JSON from the server.
I checked the JSON # JSONLint to ensure validity, checked encoding, tried different headers, but still PROBLEMS.
After a couple hours, I switched the url (by accident!)
from
http//www.testing.com/_r4444/myfile.php
to the exact same thing WITHOUT the www... and it suddenly worked.
I have no clue why this would be the case - any ideas?
the snippet follows
$(document).ready(function() {
$.ajax( {
type: "POST",
contentType: "application/json",
url: "http://testing.com/_r4444/getter.php",
beforeSend: function(x) {
if(x && x.overrideMimeType) x.overrideMimeType("application/json;charset=UTF-8");
},
data: "pass=TEST",
dataType: "json",
error: function (xhr, status) {
alert(status);
},
success: function (result) {
alert(result);
}
});
});
Are you using "www" on the page in the browser?
Try switching the call to not include the domain, like:
"/_r4444/getter.php" instead of the full domain.
I have a problem to refresh a bloc in my page.
Here is the request:
> $("#pwd_lost_link").click(function(){
alert('1');
$.ajax({
type : 'POST',
url: 'test.php',
dataType: 'json',
data :{"nom" : "akbar"},
success : function(data){
$("#main_bloc").append(data.msg);
alert('2');
},
error : function(XMLHttpRequest, textStatus, errorThrown) {
alert(XMLHttpRequest.responseText);
alert(errorThrown); }
}); })
and here is the php file
<?php
$return['nom'] = "ffrfrfrfr";
echo json_encode($return)
?>
It doesn't work. It give me a status error ( 0 ) and the page is automatically reloaded
Thanks
Michaël
Confusing question Michael, not sure what you mean by "the page is automatically reloaded" but you should do 2 things:
In the $.ajax() method, make sure your success called back is handling the data correctly. You are looking for data.msg but I don't see where .msg comes from.
$.ajax({
type: "GET",
contentType: "application/json; charset=utf-8",
data: {},
dataType: "json",
url: url,
success: function(data) {
// parse data object so you can see what's being returned ex. alert(data) or alert(data[0]) or alert(data.nom)
},
error: function (xhr, status, error) {
// XHR DOM reference: http://www.w3schools.com/dom/dom_http.asp
// check for errors ex. alert(xhr.statusText);
}
});
On the PHP side, you may want to debug there to see what is being received and what you are sending back.
Aside from that using an XHR viewer like Firebug or Chrome's built-in utility (CTRL+SHIFT+I) can be very helpful.
And on a final note, if pwd_lost_link is a link elment a id="pwd_lost_link" href="..." then you will have to stop the browser from following the link before you process the AJAX.
$("#pwd_lost_link").click(function(e) {
e.preventDefault();
alert('1');
$.ajax({
...
});
If you aren't seeing the '1' being alerted then that is definitely your first problem.
You're trying to access data.msg, but your PHP script is only creating data.nom. So data.msg doesn't exist. Try changing data.msg to data.nom and see if this does what you want.