Is there some way I can show custom exception messages as an alert in my jQuery AJAX error message?
For example, if I want to throw an exception on the server side via Struts by throw new ApplicationException("User name already exists");, I want to catch this message ('user name already exists') in the jQuery AJAX error message.
jQuery("#save").click(function () {
if (jQuery('#form').jVal()) {
jQuery.ajax({
type: "POST",
url: "saveuser.do",
dataType: "html",
data: "userId=" + encodeURIComponent(trim(document.forms[0].userId.value)),
success: function (response) {
jQuery("#usergrid").trigger("reloadGrid");
clear();
alert("Details saved successfully!!!");
},
error: function (xhr, ajaxOptions, thrownError) {
alert(xhr.status);
alert(thrownError);
}
});
}
});
On the second alert in the error callback, where I alert thrownError, I am getting undefined and the xhr.status code is 500.
I am not sure where I am going wrong. What can I do to fix this problem?
Make sure you're setting Response.StatusCode to something other than 200. Write your exception's message using Response.Write, then use...
xhr.responseText
..in your javascript.
Controller:
public class ClientErrorHandler : FilterAttribute, IExceptionFilter
{
public void OnException(ExceptionContext filterContext)
{
var response = filterContext.RequestContext.HttpContext.Response;
response.Write(filterContext.Exception.Message);
response.ContentType = MediaTypeNames.Text.Plain;
filterContext.ExceptionHandled = true;
}
}
[ClientErrorHandler]
public class SomeController : Controller
{
[HttpPost]
public ActionResult SomeAction()
{
throw new Exception("Error message");
}
}
View script:
$.ajax({
type: "post", url: "/SomeController/SomeAction",
success: function (data, text) {
//...
},
error: function (request, status, error) {
alert(request.responseText);
}
});
ServerSide:
doPost(HttpServletRequest request, HttpServletResponse response){
try{ //logic
}catch(ApplicationException exception){
response.setStatus(400);
response.getWriter().write(exception.getMessage());
//just added semicolon to end of line
}
}
ClientSide:
jQuery.ajax({// just showing error property
error: function(jqXHR,error, errorThrown) {
if(jqXHR.status&&jqXHR.status==400){
alert(jqXHR.responseText);
}else{
alert("Something went wrong");
}
}
});
Generic Ajax Error Handling
If I need to do some generic error handling for all the ajax requests. I will set the ajaxError handler and display the error on a div named errorcontainer on the top of html content.
$("div#errorcontainer")
.ajaxError(
function(e, x, settings, exception) {
var message;
var statusErrorMap = {
'400' : "Server understood the request, but request content was invalid.",
'401' : "Unauthorized access.",
'403' : "Forbidden resource can't be accessed.",
'500' : "Internal server error.",
'503' : "Service unavailable."
};
if (x.status) {
message =statusErrorMap[x.status];
if(!message){
message="Unknown Error \n.";
}
}else if(exception=='parsererror'){
message="Error.\nParsing JSON Request failed.";
}else if(exception=='timeout'){
message="Request Time out.";
}else if(exception=='abort'){
message="Request was aborted by the server";
}else {
message="Unknown Error \n.";
}
$(this).css("display","inline");
$(this).html(message);
});
You need to convert the responseText to JSON. Using JQuery:
jsonValue = jQuery.parseJSON( jqXHR.responseText );
console.log(jsonValue.Message);
If making a call to asp.net, this will return the error message title:
I didn't write all of formatErrorMessage myself but i find it very useful.
function formatErrorMessage(jqXHR, exception) {
if (jqXHR.status === 0) {
return ('Not connected.\nPlease verify your network connection.');
} else if (jqXHR.status == 404) {
return ('The requested page not found. [404]');
} else if (jqXHR.status == 500) {
return ('Internal Server Error [500].');
} else if (exception === 'parsererror') {
return ('Requested JSON parse failed.');
} else if (exception === 'timeout') {
return ('Time out error.');
} else if (exception === 'abort') {
return ('Ajax request aborted.');
} else {
return ('Uncaught Error.\n' + jqXHR.responseText);
}
}
var jqxhr = $.post(addresshere, function() {
alert("success");
})
.done(function() { alert("second success"); })
.fail(function(xhr, err) {
var responseTitle= $(xhr.responseText).filter('title').get(0);
alert($(responseTitle).text() + "\n" + formatErrorMessage(xhr, err) );
})
If someone is here as in 2016 for the answer, use .fail() for error handling as .error() is deprecated as of jQuery 3.0
$.ajax( "example.php" )
.done(function() {
alert( "success" );
})
.fail(function(jqXHR, textStatus, errorThrown) {
//handle error here
})
I hope it helps
This is what I did and it works so far in a MVC 5 application.
Controller's return type is ContentResult.
public ContentResult DoSomething()
{
if(somethingIsTrue)
{
Response.StatusCode = 500 //Anything other than 2XX HTTP status codes should work
Response.Write("My Message");
return new ContentResult();
}
//Do something in here//
string json = "whatever json goes here";
return new ContentResult{Content = json, ContentType = "application/json"};
}
And on client side this is what ajax function looks like
$.ajax({
type: "POST",
url: URL,
data: DATA,
dataType: "json",
success: function (json) {
//Do something with the returned json object.
},
error: function (xhr, status, errorThrown) {
//Here the status code can be retrieved like;
xhr.status;
//The message added to Response object in Controller can be retrieved as following.
xhr.responseText;
}
});
A general/reusable solution
This answer is provided for future reference to all those that bump into this problem. Solution consists of two things:
Custom exception ModelStateException that gets thrown when validation fails on the server (model state reports validation errors when we use data annotations and use strong typed controller action parameters)
Custom controller action error filter HandleModelStateExceptionAttribute that catches custom exception and returns HTTP error status with model state error in the body
This provides the optimal infrastructure for jQuery Ajax calls to use their full potential with success and error handlers.
Client side code
$.ajax({
type: "POST",
url: "some/url",
success: function(data, status, xhr) {
// handle success
},
error: function(xhr, status, error) {
// handle error
}
});
Server side code
[HandleModelStateException]
public ActionResult Create(User user)
{
if (!this.ModelState.IsValid)
{
throw new ModelStateException(this.ModelState);
}
// create new user because validation was successful
}
The whole problem is detailed in this blog post where you can find all the code to run this in your application.
error:function (xhr, ajaxOptions, thrownError) {
alert(xhr.status);
alert(thrownError);
}
in code error ajax request for catch error connect between client to server
if you want show error message of your application send in success scope
such as
success: function(data){
// data is object send form server
// property of data
// status type boolean
// msg type string
// result type string
if(data.status){ // true not error
$('#api_text').val(data.result);
}
else
{
$('#error_text').val(data.msg);
}
}
I found this to be nice because I could parse out the message I was sending from the server and display a friendly message to the user without the stacktrace...
error: function (response) {
var r = jQuery.parseJSON(response.responseText);
alert("Message: " + r.Message);
alert("StackTrace: " + r.StackTrace);
alert("ExceptionType: " + r.ExceptionType);
}
This function basically generates unique random API key's and in case if it doesn't then pop-up dialog box with error message appears
In View Page:
<div class="form-group required">
<label class="col-sm-2 control-label" for="input-storename"><?php echo $entry_storename; ?></label>
<div class="col-sm-6">
<input type="text" class="apivalue" id="api_text" readonly name="API" value="<?php echo strtoupper(substr(md5(rand().microtime()), 0, 12)); ?>" class="form-control" />
<button type="button" class="changeKey1" value="Refresh">Re-Generate</button>
</div>
</div>
<script>
$(document).ready(function(){
$('.changeKey1').click(function(){
debugger;
$.ajax({
url :"index.php?route=account/apiaccess/regenerate",
type :'POST',
dataType: "json",
async:false,
contentType: "application/json; charset=utf-8",
success: function(data){
var result = data.sync_id.toUpperCase();
if(result){
$('#api_text').val(result);
}
debugger;
},
error: function(xhr, ajaxOptions, thrownError) {
alert(thrownError + "\r\n" + xhr.statusText + "\r\n" + xhr.responseText);
}
});
});
});
</script>
From Controller:
public function regenerate(){
$json = array();
$api_key = substr(md5(rand(0,100).microtime()), 0, 12);
$json['sync_id'] = $api_key;
$json['message'] = 'Successfully API Generated';
$this->response->addHeader('Content-Type: application/json');
$this->response->setOutput(json_encode($json));
}
The optional callback parameter specifies a callback function to run when the load() method is completed. The callback function can have different parameters:
Type: Function( jqXHR jqXHR, String textStatus, String errorThrown )
A function to be called if the request fails.
The function receives three arguments: The jqXHR (in jQuery 1.4.x, XMLHttpRequest) object, a string describing the type of error that occurred and an optional exception object, if one occurred. 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." As of jQuery 1.5, the error setting can accept an array of functions. Each function will be called in turn. Note: This handler is not called for cross-domain script and cross-domain JSONP requests.
This is probably caused by the JSON field names not having quotation marks.
Change the JSON structure from:
{welcome:"Welcome"}
to:
{"welcome":"Welcome"}
You have a JSON object of the exception thrown, in the xhr object. Just use
alert(xhr.responseJSON.Message);
The JSON object expose two other properties: 'ExceptionType' and 'StackTrace'
I believe the Ajax response handler uses the HTTP status code to check if there was an error.
So if you just throw a Java exception on your server side code but then the HTTP response doesn't have a 500 status code jQuery (or in this case probably the XMLHttpRequest object) will just assume that everything was fine.
I'm saying this because I had a similar problem in ASP.NET where I was throwing something like a ArgumentException("Don't know what to do...") but the error handler wasn't firing.
I then set the Response.StatusCode to either 500 or 200 whether I had an error or not.
jQuery.parseJSON is useful for success and error.
$.ajax({
url: "controller/action",
type: 'POST',
success: function (data, textStatus, jqXHR) {
var obj = jQuery.parseJSON(jqXHR.responseText);
notify(data.toString());
notify(textStatus.toString());
},
error: function (data, textStatus, jqXHR) { notify(textStatus); }
});
$("#save").click(function(){
$("#save").ajaxError(function(event,xhr,settings,error){
$(this).html{'error: ' (xhr ?xhr.status : '')+ ' ' + (error ? error:'unknown') + 'page: '+settings.url);
});
});
Throw a new exception on server using:
Response.StatusCode = 500
Response.StatusDescription = ex.Message()
I believe that the StatusDescription is returned to the Ajax call...
Example:
Try
Dim file As String = Request.QueryString("file")
If String.IsNullOrEmpty(file) Then Throw New Exception("File does not exist")
Dim sTmpFolder As String = "Temp\" & Session.SessionID.ToString()
sTmpFolder = IO.Path.Combine(Request.PhysicalApplicationPath(), sTmpFolder)
file = IO.Path.Combine(sTmpFolder, file)
If IO.File.Exists(file) Then
IO.File.Delete(file)
End If
Catch ex As Exception
Response.StatusCode = 500
Response.StatusDescription = ex.Message()
End Try
Although it has been many years since this question is asked, I still don't find xhr.responseText as the answer I was looking for. It returned me string in the following format:
"{"error":true,"message":"The user name or password is incorrect"}"
which I definitely don't want to show to the users. What I was looking for is something like below:
alert(xhr.responseJSON.message);
xhr.responseJSON.message gives me the exact message from the Json Object which can be shown to the users.
$("#fmlogin").submit(function(){
$("#fmlogin").ajaxError(function(event,xhr,settings,error){
$("#loading").fadeOut('fast');
$("#showdata").fadeIn('slow');
$("#showdata").html('Error please, try again later or reload the Page. Reason: ' + xhr.status);
setTimeout(function() {$("#showdata").fadeOut({"opacity":"0"})} , 5500 + 1000); // delays 1 sec after the previous one
});
});
If there is any form is submit with validate
simply use the rest of the code
$("#fmlogin").validate({...
...
...
});
First we need to set <serviceDebug includeExceptionDetailInFaults="True" /> in web.config:
<serviceBehaviors>
<behavior name="">
<serviceMetadata httpGetEnabled="true" />
**<serviceDebug includeExceptionDetailInFaults="true" />**
</behavior>
</serviceBehaviors>
In addition to that at jquery level in error part you need to parse error response that contains exception like:
.error(function (response, q, t) {
var r = jQuery.parseJSON(response.responseText);
});
Then using r.Message you can actully show exception text.
Check complete code: http://www.codegateway.com/2012/04/jquery-ajax-handle-exception-thrown-by.html
In my case, I just removed HTTP VERB from controller.
**//[HttpPost]** ---- just removed this verb
public JsonResult CascadeDpGetProduct(long categoryId)
{
List<ProductModel> list = new List<ProductModel>();
list = dp.DpProductBasedOnCategoryandQty(categoryId);
return Json(new SelectList(list, "Value", "Text", JsonRequestBehavior.AllowGet));
}
I'm doing an ajax call to my server, and need to get the values from it. How is this done?
This is the ajax:
$.ajax({
type: "POST",
url: "http://localhost:8080/myapp/etc",
contentType: "application/json; charset=utf-8",
data: {"id": "1", "somekey": "somevalue"},
dataType: "json",
async: "true",
success: function(msg) {
alert("success " + msg);
},
error: function(msg) {
alert("error " + msg.toString());
}
});
I'm working with Restlets so I'm assuming the values would be in the Representation entity. This is the method:
#Post
public Representation doPost(Representation entity) {
String et = java.net.URLDecoder.decode(entity.getText(), "UTF-8");
System.out.println("the entity text " + et);
}
This prints out "id": "1", "somekey": "somevalue". But how do I get the other values? The async, the url, etc?
Restlet will give you access about the elements sent within the request (URL, headers, payload) but not to client-side configuration properties to build the request.
You can have a look at what is sent in the request for your AJAX call using tool like Chome console or Firebug.
The property async isn't sent within the request, so you can't get it from server side. For the URL, you can use this code within a server resource:
Reference reference = getRequest().getResourceRef();
String url = reference.toString();
For more details, have a look at javadocs for the class Reference: http://restlet.com/technical-resources/restlet-framework/javadocs/2.1/jee/api/org/restlet/data/Reference.html. This class allows you to have access to each element within it (host domain, port, path, ...).
Hope it helps you,
Thierry
The async is a client-side directive telling the client not to block while the ajax call is processed. The server doesn't know or care about this.
Getting the URL is possible server side using something like String url = ((HttpServletRequest)request).getRequestURL().toString();
you can do something like this, using the org.restlet.ext.json extension:
#Post
public Representation handle(JsonObject jo) {
System.out.println(jo.getString("id"));
System.out.println(jo.getString("somekey"));
return ...;
}
I am using Jquerys Ajax method to talk to my web service. The code seems OK, but I just monitored HTTP traffic using HTTPFox firefox plugin and I noticed unexpected results. To begin with, I am setting the ContentType as application/json and my web service is also producing JSON data but HTTPFox indicates Content Type for my HTTP requests as application/vnd.sun.wadl+xml (NS_ERROR_DOM_BAD_URI).
The Request Method is GET as set in my Ajax request, but HTTPFox indicates my Request method as OPTIONS. And while the Request succeeds and data is returned, the onSuccess method of my Ajax request is not called. Instead, the onError method is called. HTTP Fox is able to capture the data from my web service as response. See the image for HTTP Fox.
Finally, all other request from other processes in my browser seem OK but my HTTP requests are flagged 'RED' by HTTP Fox. The request from other pages and processes seem OK.( GREEN or WHITE).
I have attached screenshot of HTTPFox highlighted on one of my Request. The flagged ones are also from my application.
Image:
I have also pasted the Ajax code I am using to make the HTTP Requests.
window.onload = function() {
var seq_no = getParameterByName("seq_no");
var mileage = getParameterByName("mileage");
document.getElementById("seq_no").value = seq_no;
document.getElementById("mileage").value = mileage;
var param = 'vehReg='+encodeURIComponent(document.getElementById('vehReg').value);
// alert(param);
loadVehicleInfo(param);
};
function loadVehicleInfo(params) {
$("#message").html('<p><font color="green">Loading...</font></p>');
$.ajax({
type: "GET",
url: "http://localhost:8080/stockcloud/rest/vehicles/info",
data: params,
contentType: "application/json; charset=utf-8",
dataType: "json",
success:
function(data,status) {
$("#message").empty();
$("#message").html('<p>'+getAsUriParameters(data)+'</p>');
},
error :
function(XMLHttpRequest, textStatus, errorThrown) {
$("#message").html("<p> <font color='red'>The following error occurred: " +textStatus+ ': '+errorThrown+ "</font>");
}
});
};
function getAsUriParameters (data) {
return Object.keys(data).map(function (k) {
if (_.isArray(data[k])) {
var keyE = encodeURIComponent(k + '[]');
return data[k].map(function (subData) {
return keyE + '=' + encodeURIComponent(subData);
}).join('&');
} else {
return encodeURIComponent(k) + '=' + encodeURIComponent(data[k]);
}
}).join('&');
};
function getParameterByName(name) {
name = name.replace(/[\[]/, "\\[").replace(/[\]]/, "\\]");
var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
results = regex.exec(location.search);
return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
}
Server side Code for the request:
#Path("/vehicles")
public class VehiclesService {
#GET
#Path("info")
#Produces("application/json")
public Response getVehicleInfo(#DefaultValue("__DEFAULT__") #QueryParam("vehReg") String vehReg) {
// Send SOAP Message to SOAP Server
ServerResponse resp = new ServerResponse();
if("__DEFAULT__".equals(vehReg)) {
resp.setError("Vehicle registration must be supplied as a query parameter: ?vehReg=<THE REG NO>");
resp.setResult(false);
Response.status(Response.Status.BAD_REQUEST).entity(resp).build();
}
try {
// actual code to return the car info and return XML string with the info.
connection.disconnect();
String xml = URLDecoder.decode(s.toString(),"UTF-8");
xml = xml.replace("<", "<").replace(">", ">").replace("<?xml version='1.0' standalone='yes' ?>", "");
System.out.println(xml);
resp.setVehicle(new VehicleParse().parse(xml));
resp.setResult(true);
} catch(Exception e) {
resp.setResult(false);
resp.setError(e.getMessage());
e.printStackTrace();
Response.status(Response.Status.INTERNAL_SERVER_ERROR).entity(resp).build();
}
return Response.status(Response.Status.OK).entity(resp).build();
}
}
Is there something I am not doing right?
Thanks.
I am trying to make an AJAX call from ExtJS to a Spring 3.1.3 backend, using PUT and with a Map as a request parameter. I can successfully make a similar call using a List param and passing a JavaScript array of strings, but cannot get a Map to work using a JavaScript object.
In other words, this works:
#RequestMapping(value="stringTest", method=RequestMethod.PUT)
public #ResponseBody String stringTest(#RequestBody List<String> list) {
//do stuff
return "OK";
}
Ext.Ajax.request({
url: "stringTest",
method: 'PUT',
jsonData: ['one','two'],
success: function() { console.log('ok'); },
failure: function(){ console.log('fail'); }
});
However, this does not work:
#RequestMapping(value="mapTest", method=RequestMethod.PUT)
public #ResponseBody String mapTest(#RequestBody Map<String,String> map) {
//do stuff
return "OK";
}
Ext.Ajax.request({
url: "mapTest",
method: 'PUT',
jsonData: {one: 'one', two: 'two'},
success: function() { console.log('ok'); },
failure: function(){ console.log('fail'); }
});
The request itself does not fail (no 400 error), but the map itself is empty when the mapTest method is instantiated.
One curious point I have discovered is that I am able to make this work using both jsonData and params (but not one or the other) as part of the Ext.Ajax.request, like this:
var data = {one: 'one', two: 'two'};
Ext.Ajax.request({
url: "mapTest",
method: 'PUT',
jsonData: data,
params: data,
success: function() { console.log('ok'); },
failure: function(){ console.log('fail'); }
});
However, I can't use this approach because I cannot have the extra parameters passed as part of the URL string, which is what this ends up doing.
So, the question is, how can I use a Map as my request param, using just jsonData for the request body?
I have ajax json POST method like this
$.ajax({
type: 'POST',
url: "localhost:8080/webeditor/spring/json/",
data: JSON.stringify(contents),
dataType: "json"
});
Controller to handle post request
JSONPObject json;
BindingResult result = new BeanPropertyBindingResult( json , "MyPresentation" );
#RequestMapping(value="json/", method = RequestMethod.POST)
public void savePresentationInJSON(Presentations presentation,BindingResult result) {
//do some action
}
but I getting this error
XMLHttpRequest cannot load localhost:8080/webeditor/spring/json/. Cross origin requests are only supported for HTTP.
I'm not sure how to correct above error.
My final work version
var jsonfile={json:JSON.stringify(contents)};
$.ajax({
type: 'POST',
url: "/webeditor/spring/json/",
data: jsonfile,
dataType: "json"
});
AJAX, and
#RequestMapping(value = "/json/", method = RequestMethod.POST)
public void saveNewUsers( #RequestParam ("json") String json)
{
System.out.println( json );
}
Passing JSON with Spring is fairly straight forward. Consider the following jQuery function:
function processUrlData(data, callback) {
$.ajax({
type: "GET",
url: "getCannedMessageAsJson.html",
data: data,
dataType: "json",
success: function(responseData, textStatus) {
processResponse(responseData, callback);
},
error : function(responseData) {
consoleDebug(" in ajax, error: " + responseData.responseText);
}
});
}
Now use the following String #Controller method...
#RequestMapping(value = "/getCannedMessageAsJson.html", method = RequestMethod.POST)
public ResponseEntity<String> getCannedMessageAsJson(String network, String status, Model model) {
int messageId = service.getIpoeCannedMessageId(network, status);
String message = service.getIpoeCannedMessage(network, status);
message = message.replaceAll("\"", """);
message = message.replaceAll("\n", "");
String json = "{\"messageId\": \"" + messageId
+ "\", \"message\": \"" + message + "\"}";
HttpHeaders responseHeaders = new HttpHeaders();
responseHeaders.setContentType(MediaType.APPLICATION_JSON);
return new ResponseEntity<String>(json, responseHeaders, HttpStatus.CREATED);
}
In my case the request is so simple that I'm just hardwiring the json formatting in the controller method, but you could just as easily use a library like Jackson to produce the json string.
Also as others have stated, verify that the "value" in the #RequestMapping is a unique, legitimate filename. With the json method I show above you don't have to have a corresponding jsp page (in fact it won't use one).
In the URL : url: "localhost:8080/webeditor/spring/json/"
webeditor must be war name or service name so in ur #RequestMapping(value="/webeditor/spring/json/" i think u should not have 'webeditor' it must be only /spring/json
normally 404 means the for the URL requst is wrong or no such service is running for that URL
Looks like jQuery so why not try
$.getJSON('webeditor/spring/json', JSON.stringify(contents, function(data) {//do callbackstuff});
If you wanted to request cross domain the way to do it is like :-
cbFn = function(data) {
// do callback stuff.
}
var ca = document.createElement('script');
ca.type = 'text/javascript';
ca.async = true;
ca.src = server + '/webeditor/spring/json.jsonp?callback=cbFn';
var s = document.getElementsByTagName('head')[0];
s.parentNode.insertBefore(ca, s);
and also add the servlet mapping
<servlet-mapping>
<servlet-name>yourSevletName</servlet-name>
<url-pattern>*.jsonp</url-pattern>
</servlet-mapping>
Your application should have a context root, which would precede the rest of your URL path. And you should also have a servlet-mapping defined in web.xml which defines which requests get directed to your Spring controllers. So if the context root of your application is "myapp" and your servlet-mapping is going to *.html, then your ajax call would look like this:
$.ajax({
type: 'POST',
url: "/myapp/webeditor/spring/json.html",
data: JSON.stringify(contents),
dataType: "json",
success: function(response) {
// Success Action
}
});
In yr jsp include the tag library like so
<%# taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
Then create a full url using spring
<c:url var="yourFullUrl" value="/webeditor/spring/json/" />
then create javascript variable based on this so you can use in Ajax
<script>
var yourUrl= '<c:out value="${yourFullUrl}"/>';
</script>
No use the javascriptvariable representing the url :
<script>
$.ajax({
type: 'POST',
url: yourUrl,
data: JSON.stringify(contents),
dataType: "json"
});
</script>