We Keep Coding

The URL string changes after ajax call return

I have been struggling with a problem for some time. I cannot understand the reason as it happens in a specific case, not with the others.
I have a javascript function that calls a PHP script to upload a file to the server (standard code, have been using it and works perfectly normally).
function upload_picture(fieldID, success, error) {
var folderName;
switch (fieldID) {
case "pop_drawing":
folderName = "pop_dwg";
break;
case "pop_installation":
folderName = "pop_inst";
break;
case "pop_picture":
folderName = "pop_pict";
break;
}
var file_data = $('#' + fieldID).prop('files')[0];
var form_data = new FormData();
form_data.append('folder', folderName);
form_data.append('file', file_data);
$.ajax({
url: 'dbh/upload.php',
dataType: 'text',
type: 'POST',
cache: false,
contentType: false,
processData: false,
data: form_data,
success: function (response) {
event.preventDefault();
console.log (response); // display success response from the PHP script
if (response.indexOf("yüklendi") > 0) {
success();
}
},
error: function (response) {
event.preventDefault();
console.log (response); // display success response from the PHP script
error(response);
}
});
}
The function is called from several points in the code and it works OK except one point. At this particular point when it returns it changes the page URL from
http://localhost/pop/#
to
http://localhost/pop/?pop_drawing=&pop_installation=&pop_picture=Compelis-Logo.jpg&pop_need_special_prod=Hay%C4%B1r&pop_need_application=Hay%C4%B1r&pop_order_made=Evet&pop_approval=4&pop_cost_visible=Hay%C4%B1r#
due to a reason I could not understand. This string in the URL line are some parameters on the web page where I press the button to call the function.
The code which call the function is:
function uploadPopPicture () {
if ($('#pop_picture_label').html() !== 'Seçili dosya yok...') {
upload_picture('pop_picture',
function(){
console.log('Görsel yüklendi...');
},
function(error){
console.log('Error:', error);
});
}
}
Same code (obviously with different parameters) is used elsewhere in the program and works OK.
Any ideas what I might be missing.
Many thanks in advance

A button's default behaviour is "submit". If you don't specify any particular behaviour then that's what it will do. So when clicked it will submit your form, regardless of any JavaScript.
Add the attribute type="button" to your button HTML and that will stop it from automatically submitting the form.

Netsuite form JavaScript Error in Safari

I added a recaptcha script on my Netsuite external form and it works on every browser except for Safari (using 5.1.7).
It gives this error:
"onSubmit (saveRecord) customform JS_EXCEPTION ReferenceError Can't find variable: onSubmit"
The code I'm using is below and the Safari error console doesn't give me anything. Any ideas?
function onSubmit() {
var captchaChallenge = $('#recaptcha_challenge_field').val();
var captchaResponse = $('#recaptcha_response_field').val();
var isToBeSubmitted = true;
$.ajax({
url: CAPTCHA_VERIFICATION_SUITELET_URL + '&challenge=' + captchaChallenge + '&response=' + captchaResponse,
type: 'POST',
accepts: 'application/json',
dataType: 'json',
cache: false,
async: false
}).done(function (data) {
if (!data.status.isSuccess) {
alert('Captcha Verification Failed.');
Recaptcha.reload();
isToBeSubmitted = false;
}
});
return isToBeSubmitted;
}
Images of script setup

Can you try to change the function to another name not so generic like
function onCustomerSubmit

Finally figured out the issue. When I attach a script to the online customer form, I needed to make sure the checkbox "Available Without Login" is checked. Never saw it before, but I checked it and it solved the issue with Safari. Attached a picture for reference.

Ajax post working but not callback message in Android browser

im implementing sign up with ajax on my site its working perfectly on desktop but causing problem in Android Browser The problem is after i click on signup button in android browser it post data to database but do not replace the html message.And alert native code error.
function postdata(){
var chkfrm = checkdata();
if(chkfrm == 0){
var url = '<?php echo base_url();?>index.php/Signup/signin';
$.ajax({
type: "POST",
url: url,
data: $("#formI").serialize(), // serializes the form's elements.
beforeSend:function(){
$("#signupdiv").html('<h1>Loadinng...........</h1>');
},
success:function(data)
{
$("#signupdiv").html(data);
},
error:function () {
alert(console.log);
}
});
e.preventDefault();
}
else {
$("#msgjava").html('<p>We need a little bit information from you.Please fill it.</p>');
return false;
}

You can't do e.preventDefault(); where you are because e is not passed into this function (thus it is undefined). This will cause an error and stop JS execution.
In what you posted, you are also missing a closing brace at the end of the postdata() function.
Your alert says "native code" because that's what this line of code:
alert(console.log)
will do. console.log is a native function so alerting a native function won't do anything useful. You need to make that alert a lot more useful. To see in more detail what error is coming back from the ajax function, change your error handler to something like this:
error: function(jqXHR, textStatus, errorThrown) {
alert("status = " + textStatus + ", errorThrown = " + errorThrown);
}
And, then see what it says.

Chrome issue - chat lines return multiple times

I wrote a little chat plugin that i'll need to use on my site. It works with a simple structure in HTML, like this:
<div id="div_chat">
<ul id="ul_chat">
</ul>
</div>
<div id="div_inputchatline">
<input type="text" id="input_chatline" name="input_chatline" value="">
<span id="span_sendchatline">Send</span>
</div>
There's a 'click' bound event on that Span element, of course. Then, when the user inserts a message and clicks on the "Send" span element, there's a Javascript function with calls an Ajax event that inserts the message into the MySQL database:
function function_write_newchatline()
{
var chatline = $('#input_chatline').val();
$.ajax
({
type: "POST",
url: "ajax-chat-writenewline.php", //1: ok, 0: errore
data: ({'chat_line': chatline}),
dataType: "text",
cache: false,
success: function(ajax_result)
{
function_get_newchatlines();
}
});
}
And, in case the message is successfully inserted into DB, it calls a function to read new lines and put them in HTML structure i posted before:
function function_get_newchatlines()
{
$.ajax
({
type: "POST",
url: "ajax-chat-loadnewlines.php", //1: ok, 0: errore
data: '',
dataType: "text",
cache: false,
success: function(ajax_result) //example of returned string: 'message1>+<message2>+<message3'
{
//explode new chat lines from returned string
var chat_rows = ajax_result.split('>+<');
for (id_row in chat_rows)
{
//insert row into html
$('#ul_chat').prepend('<li>' + chat_rows[id_row] + '</li>');
}
$('#span_sendchatline').html('Send');
}
});
}
Note: 'ajax_result' only contains html entities, not special chars, so even if a message contains '>+<', it is encoded by the php script called with Ajax, before being processed from this JS function.
Now, comes the strange behaviour: when posting new messages Opera, Firefox and even IE8 works well, as intended, like this:
But, when i open Chrome window, i see this:
As you can see, in Chrome the messages are shown multiple times (increasing the number each time, up to 8 lines per message). I checked the internal debug viewer and it doesn't seem that the "read new lines" function is called more than one time, so it should be something related to Jquery events, or something else.
Hope i've been clear in my explanation, should you need anything else, let me know :)
Thanks, Erenor.
EDIT
As pointed out by Shusl, i forgot to mention that the function function_get_newchatlines() is called, periodically, by a setInterval(function_get_newchatlines, 2000) into Javascript.
EDIT2
Here's is a strip of the code from the PHP file called by Ajax to get new chat lines (i don't think things like "session_start()" or mysql connection stuff are needed here)
//check if there's a value for "last_line", otherwise put current time (usually the first time a user logs into chat)
if (!isset($_SESSION['prove_chat']['time_last_line']) || !is_numeric($_SESSION['prove_chat']['time_last_line']) || ($_SESSION['prove_chat']['time_last_line'] <= 0))
{
$_SESSION['prove_chat']['time_last_line'] = microtime(true);
}
//get new chat lines
$result = mysql_query("select * from chat_module_lines where line_senttime > {$_SESSION['prove_chat']['time_last_line']} order by line_senttime asc; ", $conn['user']);
if(!$result || (mysql_num_rows($result) <= 0))
{
mysql_close($conn['user']); die('2-No new lines');
}
//php stuff to create the string
//....
die($string_with_chat_lines_to_be_used_into_Javascript);
Anyway, i think that, if the problem was this PHP script, i would get similar errors in other browsers, too :)
EDIT4
Here's the code that binds the click event to the "Send" span element:
$('#span_sendchatline').on('click', function()
{
//check if there's already a message being sent
if ($('#span_sendchatline').html() == 'Send')
{
//change html content of the span element (will be changed back to "send"
//when the Ajax request completes)
$('#span_sendchatline').html('Wait..');
//write new line
function_write_newchatline();
}
//else do nothing
});
(Thanks to f_puras for adding the missing tag :)

I would do one of the following:
option 1:
stop the timer just before the ajax call in function_write_newchatline() and start the timer when the ajax call returns.
function function_write_newchatline()
{
var chatline = $('#input_chatline').val();
stop_the_timer();
$.ajax
({
type: "POST",
url: "ajax-chat-writenewline.php", //1: ok, 0: errore
data: ({'chat_line': chatline}),
dataType: "text",
cache: false,
success: function(ajax_result)
{
function_get_newchatlines();
},
complete: function() {
start_the_timer();
}
});
}
option 2:
Not call function_get_newchatlines() at all in the success event of the ajax call. Let only the timer retrieve the chat entries.
function function_write_newchatline()
{
var chatline = $('#input_chatline').val();
$.ajax
({
type: "POST",
url: "ajax-chat-writenewline.php", //1: ok, 0: errore
data: ({'chat_line': chatline}),
dataType: "text",
cache: false,
success: function(ajax_result)
{
// do nothing
}
});
}
I think there is some race condition between the function_get_newchatlines() that is called after a chat entry is added by the user and the periodical call of function_get_newchatlines() by the timer.
option 3:
Use setTimeout instead of setInterval. setInterval can mess things up when the browser is busy. So in the end of the setTimeout function call setTimeout again.

$.ajax not working first time

I have a button in html page.
<input type="image" src="images/login_button.png" id="imageButton" onclick="LoginButtonClick();" />
I am calling this method on button click:
LoginButtonClick = function() {
alert ("Button click event raised"); // this alert msg raising every time when onclick event occurs.
$.ajax({
alert ("Inside Ajax."); // This alert not executing first 1 or 2 times.
type: 'GET',
url: 'http://URL/Service.svc/LoginValidation',
dataType: 'json',
error: pmamml.ajaxError,
success: function(response, status, xhr) {
if (response != "") {
alert ("Response receive ");
}
else {
alert("Invalid Data.");
}
}
});
}
As I mentioned above $.ajax not working first 2 , 3 button click attempts.
In mozilla it throws an error "[Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE)" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: JQuery.js :: :: line 20" data: no]"
Is there any way to fix this issues..

I'm not sure why it is executing later. But here's the deal--you're placing the alert in the object literal that defines the parameters for the .ajax method. It doesn't belong there. Try putting the alert in your success and/or error handlers.
UPDATE
How long are you waiting? When you initiate an ajax request, it isn't going to hang the UI. It could be that you're seeing the result of the first click on your 3rd or 4th attempt and think that you're triggering it on that 3rd or 4th attempt.

The $.ajax() function receives as a parameter a set of key/value pairs that configure the Ajax request. I don't think that the syntax will be correct by placing the alert() in there.

Note - entering an absolute path isnt going to work if the domain is not the current one - it is against the Same Origin Policy that browsers adhere too - this might explain why nothing happens when its executed - i suggest you look in your browser debugger to verify.
You should be binding the click event like this :
$(document).ready(function() {
$('#imageButton').click(function() {
// code here
});
});
so your complete code will look like this :
HTML
<input type="image" src="images/login_button.png" id="imageButton" />
JavaScript
$(document).ready(function () {
$('#imageButton').click(function () {
alert("Button click event raised"); // this alert msg raising every time when onclick event occurs.
$.ajax({
type: 'GET',
url: 'http://URL/Service.svc/LoginValidation',
dataType: 'json',
error: pmamml.ajaxError,
success: function (response, status, xhr) {
if (response != "") {
alert("Response receive ");
} else {
alert("Invalid Data.");
}
}
});
});
});
I have removed the alert ("Inside Ajax."); line as this will not be executed - you pass an object {} of parameters not code to execute. If you want to execute before the ajax request is sent do this :
$.ajax({
beforeSend: function() {
alert('inside ajax');
}
// other options here
});
Docs for the $.ajax() function are here

I agree that you have the second alert in the wrong place, and dont know what pmamml.ajaxError function is but may be your call returns with error and therefore your success alerts are not firing. You can check with error and complete functions as follows:
LoginButtonClick = function() {
alert ("Button click event raised"); // this alert msg raising every time when onclick event occurs.
$.ajax({
type: 'GET',
url: 'http://URL/Service.svc/LoginValidation',
dataType: 'json',
error: function(jqXHR, textStatus, errorThrown){
alert ("ajax call returns error: " + errorThrown);
},
success: function(response, status, xhr) {
if (response != "") {
alert ("Response receive ");
}
else {
alert("Invalid Data.");
}
},
complete:function(jqXHR, textStatus){
alert('completed with either success or fail');
}
});
}
You can test with Google Chrome's Developer tools -> Network tab, if a request is made and returned (https://developers.google.com/chrome-developer-tools/docs/network)