Related
I code this ajax request but I don't know why the code in the success method doesn't work
Even though in the networks in chrome browser appear state: 200ok
this is ajax code:
$("#noti_filter").click(function(){
//first add item into cart
var item_id = 'test';
$.ajax({
method:"POST",
//contentType:"application/json",
url:"../html/notifies.php",
data:{product_id:item_id},
dataType: "json",
success:function(data,state) {
console.log(data);
console.log(state);
alert('ajax success');
}
});
});
the problem is that alert or console Not to mention the others code
success:function(data,state)
{
console.log(data);
console.log(state);
alert('ajax success');
}
From the ajax events docs:
success (Local Event)
This event is only called if the request was successful (no errors from the server, no errors with the data).
Since your server responded with 200 OK that means we can route out problems with the server and are left with errors with the data.
From the ajax docs (only the relevant parts):
dataType
The type of data that you're expecting back from the server.
The available types (and the result passed as the first argument to your success callback) are:
"json": Evaluates the response as JSON and returns a JavaScript object.
...
The JSON data is parsed in a strict manner; any malformed JSON is rejected and a parse error is thrown. As of jQuery 1.9, an empty response is also rejected; the server should return a response of null or {} instead. (See json.org for more information on proper JSON formatting.)
So most likely the data returned by the server is being rejected by ajax in which case a parse error should be thrown.
This would be an example of how to implement an error handler:
$("#noti_filter").click(function(){
//first add item into cart
var item_id = 'test';
$.ajax({
method:"POST",
//contentType:"application/json",
url:"../html/notifies.php",
data:{product_id:item_id},
dataType: "json",
success: function(data,state) {
console.log(data);
console.log(state);
alert('ajax success');
},
error: function(err) {
console.log(err.responseText); // <-- printing error message to console
}
});
});
You defined the dataType as json. The dataType is the type of data that you're expecting back from the server. Does your server responds json?
I assume the result of your 200-ok-server-request is probably not in json format, so the parsing fails and your success-callback is not called. You can catch the error with error callback function.
After that you know the exact reason.
I've been trying to get result from this Ajax command but only to end up with a failure
$.ajax({
type: "get",
url: "http://[localhost]:80**/*****/getdata.jws",
data: 'method=s**&Table=empservice&Condition=%22ID_Service%22%3D'+$(this).val()+'',
success: processSuccess,
error: processError
});
function processSuccess(data, status, req) {
if (status == "success")
alert("SUCCESS");
}
function processError(data, status, req) {
alert("ERROR");
}
}
});
This is supposed to call a jws web-service and return the XML result, I've tested the URL in the browser and it returns the wanted result XML ( the URL being url concatenated to "?" and data = http://[localhost]:80/*/getdata.jws?method=s**&Table=empservice&Condition=%22ID_Service%22%3D2) I've tried also to make a variable to get $(this).val() into it before the call but nothing works help please
ps: after the call I get the alert popup containing the "ERROR" message
ps2: you probably know it but I'll say it anyway [localhost] = localhost because the website do not allow localhost in a link
Try changing your error handler to something like this so you get more info than just "ERROR". This will write the actual error to the Firebug console. Also, take a look at the Firebug console to see what is actually being sent. I am assuming you aware I am referring to Firefox with the Firebug add-on.
error : function(xhr, textStatus, error){
console.log(xhr.statusText);
console.log(textStatus);
console.log(error);
TD
I found it, I need to use a proxy since AJAX calls are not allowed outside of one's domain
if your domain is localhost:80
a call from localhost:80 to localhost:8081 for example is not allowed
a call from localhost:80 to sdlksdlk.com is not allowed
only calls from localhost:80 to localhost:80 are allowed (in this example of course)
I have the following:
$.ajax({ cache: false,
url: "/Admin/Contents/GetData",
data: { accountID: AccountID },
success: function (data) {
$('#CityID').html(data);
},
error: function (ajaxContext) {
alert(ajaxContext.responseText)
}
});
When I lose connectivity to the internet the error is called but I don't see anything in the responseText.
Is there a way I can find out different kind of errors based on status information in the returned ajaxContent? I would really like to be able to put out a message saying "Internet connectivity lost" and another message if there is some other problem.
According to the jQuery docu the error function receives three arguments:
jqXHR:
textStatus: a string describing the type of error that occurred
errorThrown: an optional exception object, if one occurred
Furthermore it states:
Possible values for the second argument (besides null) are "timeout", "error", "abort", and "parsererror". When an HTTP error occurs, errorThrown receives the textual portion of the HTTP status, such as "Not Found" or "Internal Server Error."
So you might want to have a look at the content of the second adn third parameter.
$.ajax({ cache: false,
url: "/Admin/Contents/GetData",
data: { accountID: AccountID },
success: function (data) {
$('#CityID').html(data);
},
error: function (ajaxContext) {
if(ajaxContext.status=="404")
{
//write your not found handler code here
}
else
alert(ajaxContext.status)
}
});
Updated.
You should just add: timeout: , somewhere within $.ajax({}). Also, cache: false, might help in a few scenarios.
$.ajax is well documented, you should check options there, might find something useful.
JQuery Ajax - How to Detect Network Connection error when making Ajax call
if you mean defferent kinds of response results it's here - http://api.jquery.com/jQuery.ajax/ - statusCode parameters
I have a registration form and am using $.ajax to submit it.
This is my AJAX request:
$(document).ready(function() {
$("form#regist").submit(function() {
var str = $("#regist").serialize();
$.ajax({
type: 'POST',
url: 'submit1.php',
data: $("#regist").serialize(),
dataType: 'json',
success: function() {
$("#loading").append("<h2>you are here</h2>");
}
});
return false;
});
});
In my submit1.php file I check for the existence of fields email address and username in the database.
I wish to display an error message if those value exist without a page refresh.
How can I add this to the success callback of my AJAX request?
The result is probably not in JSON format, so when jQuery tries to parse it as such, it fails. You can catch the error with error: callback function.
You don't seem to need JSON in that function anyways, so you can also take out the dataType: 'json' row.
Although the problem is already solved i add this in the hope it will help others.
I made the mistake an tried to use a function directly like this (success: OnSuccess(productID)). But you have to pass an anonymous function first:
function callWebService(cartObject) {
$.ajax({
type: "POST",
url: "http://localhost/AspNetWebService.asmx/YourMethodName",
data: cartObject,
contentType: "application/x-www-form-urlencoded",
dataType: "html",
success: function () {
OnSuccess(cartObject.productID)
},
error: function () {
OnError(cartObject.productID)
},
complete: function () {
// Handle the complete event
alert("ajax completed " + cartObject.productID);
}
}); // end Ajax
return false;
}
If you do not use an anonymous function as a wrapper OnSuccess is called even if the webservice returns an exception.
I tried removing the dataType row and it didn't work for me. I got around the issue by using "complete" instead of "success" as the callback. The success callback still fails in IE, but since my script runs and completes anyway that's all I care about.
$.ajax({
type: 'POST',
url: 'somescript.php',
data: someData,
complete: function(jqXHR) {
if(jqXHR.readyState === 4) {
... run some code ...
}
}
});
in jQuery 1.5 you can also do it like this.
var ajax = $.ajax({
type: 'POST',
url: 'somescript.php',
data: 'someData'
});
ajax.complete(function(jqXHR){
if(jqXHR.readyState === 4) {
... run some code ...
}
});
Make sure you're not printing (echo or print) any text/data prior to generate your JSON formated data in your PHP file. That could explain that you get a -sucessfull 200 OK- but your sucess event still fails in your javascript. You can verify what your script is receiving by checking the section "Network - Answer" in firebug for the POST submit1.php.
Put an alert() in your success callback to make sure it's being called at all.
If it's not, that's simply because the request wasn't successful at all, even though you manage to hit the server. Reasonable causes could be that a timeout expires, or something in your php code throws an exception.
Install the firebug addon for firefox, if you haven't already, and inspect the AJAX callback. You'll be able to see the response, and whether or not it receives a successful (200 OK) response. You can also put another alert() in the complete callback, which should definitely be invoked.
I was returning valid JSON, getting a response of 200 in my "complete" callback, and could see it in the chrome network console... BUT I hadn't specified
dataType: "json"
once I did, unlike the "accepted answer", that actually fixed the problem.
I had same problem. it happen because javascript expect json data type in returning data. but if you use echo or print in your php this situation occur. if you use echo function in php to return data, Simply remove dataType : "json" working pretty well.
You must declare both Success AND Error callback. Adding
error: function(err) {...}
should fix the problem
I'm using XML to carry the result back from the php on the server to the webpage and I have had the same behaviour.
In my case the reason was , that the closing tag did not match the opening tag.
<?php
....
header("Content-Type: text/xml");
echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>
<result>
<status>$status</status>
<OPENING_TAG>$message</CLOSING_TAG>
</result>";
?>
I had this problem using an ajax function to recover the user password from Magento. The success event was not being fired, then I realized there were two errors:
The result was not being returned in JSON format
I was trying to convert an array to JSON format, but this array had non-utf characters
So every time I tried to use json_eoncde() to encode the returning array, the function was not working because one of its indexes had non-utf characters, most of them accentuation in brazilian portuguese words.
I tried to return string from controller but why control returning to error block not in success of ajax
var sownum="aa";
$.ajax({
type : "POST",
contentType : 'application/json; charset=utf-8',
dataType : "JSON",
url : 'updateSowDetails.html?sownum=' + sownum,
success : function() {
alert("Wrong username");
},
error : function(request, status, error) {
var val = request.responseText;
alert("error"+val);
}
});
I faced the same problem when querying controller which does not return success response, when modified my controller to return success message problem was solved.
note using Lavalite framework.
before:
public function Activity($id)
{
$data=getData();
return
$this->response->title('title')
->layout('layout')
->data(compact('data'))
->view('view')
->output();
}
after code looks like:
try {
$attributes = $request->all();
//do something
return $this->response->message('')
->code(204)
->status('success')
->url('url'. $data->id)
->redirect();
} catch (Exception $e) {
return $this->response->message($e->getMessage())
->code(400)
->status('error')
->url('nothing Wrong')
->redirect()
}
this worked for me
I had the same problem i solved it in that way:
My ajax:
event.preventDefault();
$.ajax('file.php', {
method: 'POST',
dataType: 'json',
contentType: 'application/json',
data: JSON.stringify({tab}),
success: function(php_response){
if (php_response == 'item')
{
console.log('it works');
}
}
})
Ok. The problem is not with json but only php response.
Before: my php response was:
echo 'item';
Now:
$variable = 'item';
echo json.encode($variable);
Now my success working.
PS. Sorry if something is wrong but it is my first comment on this forum :)
in my case the error was this was in the server side and for that reason it was returning a html
wp_nonce_field(basename(__FILE__), "mu-meta-box-nonce");
Add 'error' callback (just like 'success') this way:
$.ajax({
type: 'POST',
url: 'submit1.php',
data: $("#regist").serialize(),
dataType: 'json',
success: function() {
$("#loading").append("<h2>you are here</h2>");
},
error: function(jqXhr, textStatus, errorMessage){
console.log("Error: ", errorMessage);
}
});
So, in my case I saw in console:
Error: SyntaxError: Unexpected end of JSON input
at parse (<anonymous>), ..., etc.
The success callback takes two arguments:
success: function (data, textStatus) { }
Also make sure that the submit1.php sets the proper content-type header: application/json
Is it possible to catch an error when using JSONP with jQuery? I've tried both the $.getJSON and $.ajax methods but neither will catch the 404 error I'm testing. Here is what I've tried (keep in mind that these all work successfully, but I want to handle the case when it fails):
jQuery.ajax({
type: "GET",
url: handlerURL,
dataType: "jsonp",
success: function(results){
alert("Success!");
},
error: function(XMLHttpRequest, textStatus, errorThrown){
alert("Error");
}
});
And also:
jQuery.getJSON(handlerURL + "&callback=?",
function(jsonResult){
alert("Success!");
});
I've also tried adding the $.ajaxError but that didn't work either:
jQuery(document).ajaxError(function(event, request, settings){
alert("Error");
});
Here's my extensive answer to a similar question.
Here's the code:
jQuery.getJSON(handlerURL + "&callback=?",
function(jsonResult){
alert("Success!");
})
.done(function() { alert('getJSON request succeeded!'); })
.fail(function(jqXHR, textStatus, errorThrown) { alert('getJSON request failed! ' + textStatus); })
.always(function() { alert('getJSON request ended!'); });
It seems that JSONP requests that don't return a successful result never trigger any event, success or failure, and for better or worse that's apparently by design.
After searching their bug tracker, there's a patch which may be a possible solution using a timeout callback. See bug report #3442. If you can't capture the error, you can at least timeout after waiting a reasonable amount of time for success.
Detecting JSONP problems
If you don't want to download a dependency, you can detect the error state yourself. It's easy.
You will only be able to detect JSONP errors by using some sort of timeout. If there's no valid response in a certain time, then assume an error. The error could be basically anything, though.
Here's a simple way to go about checking for errors. Just use a success flag:
var success = false;
$.getJSON(url, function(json) {
success = true;
// ... whatever else your callback needs to do ...
});
// Set a 5-second (or however long you want) timeout to check for errors
setTimeout(function() {
if (!success)
{
// Handle error accordingly
alert("Houston, we have a problem.");
}
}, 5000);
As thedawnrider mentioned in comments, you could also use clearTimeout instead:
var errorTimeout = setTimeout(function() {
if (!success)
{
// Handle error accordingly
alert("Houston, we have a problem.");
}
}, 5000);
$.getJSON(url, function(json) {
clearTimeout(errorTimeout);
// ... whatever else your callback needs to do ...
});
Why? Read on...
Here's how JSONP works in a nutshell:
JSONP doesn't use XMLHttpRequest like regular AJAX requests. Instead, it injects a <script> tag into the page, where the "src" attribute is the URL of the request. The content of the response is wrapped in a Javascript function which is then executed when downloaded.
For example.
JSONP request: https://api.site.com/endpoint?this=that&callback=myFunc
Javascript will inject this script tag into the DOM:
<script src="https://api.site.com/endpoint?this=that&callback=myFunc"></script>
What happens when a <script> tag is added to the DOM? Obviously, it gets executed.
So suppose the response to this query yielded a JSON result like:
{"answer":42}
To the browser, that's the same thing as a script's source, so it gets executed. But what happens when you execute this:
<script>{"answer":42}</script>
Well, nothing. It's just an object. It doesn't get stored, saved, and nothing happens.
This is why JSONP requests wrap their results in a function. The server, which must support JSONP serialization, sees the callback parameter you specified, and returns this instead:
myFunc({"answer":42})
Then this gets executed instead:
<script>myFunc({"answer":42})</script>
... which is much more useful. Somewhere in your code is, in this case, a global function called myFunc:
myFunc(data)
{
alert("The answer to life, the universe, and everything is: " + data.answer);
}
That's it. That's the "magic" of JSONP. Then to build in a timeout check is very simple, like shown above. Make the request and immediately after, start a timeout. After X seconds, if your flag still hasn't been set, then the request timed out.
I know this question is a little old but I didn't see an answer that gives a simple solution to the problem so I figured I would share my 'simple' solution.
$.getJSON("example.json", function() {
console.log( "success" );
}).fail(function() {
console.log( "error" );
});
We can simply use the .fail() callback to check to see if an error occurred.
Hope this helps :)
If you collaborate with the provider, you could send another query string parameter being the function to callback when there's an error.
?callback=?&error=?
This is called JSONPE but it's not at all a defacto standard.
The provider then passes information to the error function to help you diagnose.
Doesn't help with comm errors though - jQuery would have to be updated to also callback the error function on timeout, as in Adam Bellaire's answer.
Seems like this is working now:
jQuery(document).ajaxError(function(event, request, settings){
alert("Error");
});
I use this to catch an JSON error
try {
$.getJSON(ajaxURL,callback).ajaxError();
} catch(err) {
alert("wow");
alert("Error : "+ err);
}
Edit: Alternatively you can get the error message also. This will let you know what the error is exactly. Try following syntax in catch block
alert("Error : " + err);
Mayby this works?
.complete(function(response, status) {
if (response.status == "404")
alert("404 Error");
else{
//Do something
}
if(status == "error")
alert("Error");
else{
//Do something
}
});
I dont know whenever the status goes in "error" mode. But i tested it with 404 and it responded
you ca explicitly handle any error number by adding this attribute in the ajax request:
statusCode: {
404: function() {
alert("page not found");
}
}
so, your code should be like this:
jQuery.ajax({
type: "GET",
statusCode: {
404: function() {
alert("page not found");
}
},
url: handlerURL,
dataType: "jsonp",
success: function(results){
alert("Success!");
},
error: function(XMLHttpRequest, textStatus, errorThrown){
alert("Error");
}
});
hope this helps you :)
I also posted this answer in stackoverflow - Error handling in getJSON calls
I know it's been a while since someone answerd here and the poster probably already got his answer either from here or from somewhere else. I do however think that this post will help anyone looking for a way to keep track of errors and timeouts while doing getJSON requests. Therefore below my answer to the question
The getJSON structure is as follows (found on http://api.jqueri.com):
$(selector).getJSON(url,data,success(data,status,xhr))
most people implement that using
$.getJSON(url, datatosend, function(data){
//do something with the data
});
where they use the url var to provide a link to the JSON data, the datatosend as a place to add the "?callback=?" and other variables that have to be send to get the correct JSON data returned, and the success funcion as a function for processing the data.
You can however add the status and xhr variables in your success function. The status variable contains one of the following strings : "success", "notmodified", "error", "timeout", or "parsererror", and the xhr variable contains the returned XMLHttpRequest object
(found on w3schools)
$.getJSON(url, datatosend, function(data, status, xhr){
if (status == "success"){
//do something with the data
}else if (status == "timeout"){
alert("Something is wrong with the connection");
}else if (status == "error" || status == "parsererror" ){
alert("An error occured");
}else{
alert("datatosend did not change");
}
});
This way it is easy to keep track of timeouts and errors without having to implement a custom timeout tracker that is started once a request is done.
Hope this helps someone still looking for an answer to this question.