Trying to display a value from database without refreshing the webpage using JQuery and Ajax was successful in displaying this however “Served at: /Project name” is getting appended to the value displayed
Script:
$(document).ready(function() {
$('#AESASJOBRUNOPTION').change(function() {
var AESASJOBRUNOPTION = $('#AESASJOBRUNOPTION').val();
$.ajax({
type:'POST',
url: "AESASJobCurrentOpenPeriod",
data: {AESASJOBRUNOPTION: AESASJOBRUNOPTION},
cache: false,
success: function(result) {
$("#result1").html(result);
$("#result1").html(result).slideDown('slow');
}
});
});
});
Servlet:
try{
if(ASCOGSRS.next()){
//System.out.println("Open Peiod is :"+ASCOGSRS.getString(1));
HttpSession OpenPeriodsession=request.getSession();
OpenPeriodsession.setAttribute("ASCOGSCurrentOpenPeriod", ASCOGSRS.getString(1));
PrintWriter out =response.getWriter();
String ASCOGSOpenPeriod=ASCOGSRS.getString(1);
out.print(" The Current Open Period is: "+ASCOGSOpenPeriod);
}
}
If your project is using JET Template from Eclipse, looks like the doPost method appends the extra Served at: <PATH>.
If JET Template is used, following are possible solutions:
Skip using JET Template in Eclipse Window -> Preferences -> Java EE
If Skipping JET Template is not possible and your AJAX request only retrieves the data, change the request type to GET instead of POST
If JET Template is not used, following is a solution at the Javascript level:
$(document).ready(function() {
$('#AESASJOBRUNOPTION').change(function() {
var AESASJOBRUNOPTION = $('#AESASJOBRUNOPTION').val();
$.ajax({
type:'POST',
url: "AESASJobCurrentOpenPeriod",
data: {AESASJOBRUNOPTION: AESASJOBRUNOPTION},
cache: false,
success: function(result) {
result_without_path = result.replace(/Served at:[\/a-zA-Z0-9]*/i,'');
$("#result1").html(result_without_path);
$("#result1").html(result_without_path).slideDown('slow');
}
});
});
});
You may also look for response writer in your servlets which may write the response it should be something like:
response.getWriter().append("Served at: ").append(request.getContextPath());
And then you can comment this line from your servlet.
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 have a java function that gets a JSON string of data from a Servlet in Java. I am trying to use that data to populate a datatable (http://www.datatables.net/examples/data_sources/ajax.html)
This is the way that the DataTables website instructs users to populate datatables:
$(document).ready(function() {
$('#example').dataTable( {
"ajax": '../ajax/data/arrays.txt'
} );
} );
And this is the javascript method that calls the doPost method in my servlet to generate and return the JSON:
<script>
$(document).ready(function() { // When the HTML DOM is ready loading, then execute the following function...
//$('#somebutton').click(function() { // Locate HTML DOM element with ID "somebutton" and assign the following function to its "click" event...
var bodyContent = $.ajax({
url : "DAOserv",
global : false,
type : "POST",
data : "name=value",
dataType : "json",
async : false,
success : function() {
console.log("ok");
alert("ok");
}
}).responseText;
console.log(bodyContent);
});
</script>
How can I get the JSON string in var bodyContent to populate the datatable?
First off, you're not really doing AJAX; when you do:
var bodyContent = $.ajax({
url : "DAOserv",
global : false,
type : "POST",
data : "name=value",
dataType : "json",
async : false,
success : function() {
console.log("ok");
alert("ok");
}).responseText;
You set async: false ... but AJAX stands for Asynchonous Javascript and XML. With an AJAX approach the following happens:
You start the request by doing $.ajax
The server takes however long to respond; the user's browser is not locked up during this time
When the server responds the success callback you defined gets called
With your approach
You start the request by doing $.ajax
The user's browser is locked up while waiting for a response
When the server responds your code (after the $.ajax call) is invoked.
To make your code actual AJAX do this instead:
var bodyContent = $.ajax({
url : "DAOserv",
global : false,
type : "POST",
data : "name=value",
dataType : "json",
success : function(responseText) {
bodyContent = responseText
}
});
Of course, once the response comes back you also need to build your Data Table, so what you really want is:
success : function(responseText) {
$('#example').dataTable( {
"data": responseText
});
}
(Or something to that effect; I forget DataTable's exact syntax.)
Refer to jQuery.ajax docs. The data returned from server in first argument of success callback. Also note that all manipulations with this data whould be inside this callback. I guess you should additionally check status argument:
$(document).ready(function() {
var bodyContent = null;
$.ajax({
url : "DAOserv",
global : false,
type : "POST",
data : "name=value",
dataType : "json",
success : function(data, status) {
console.log(data);
$('#example').dataTable( {
"data": $.parseJSON(data),
"columns": [
{ "title": "Engine" },
{ "title": "Browser" },
{ "title": "Platform" },
]
});
});
});
});
UPDATE To populate data server should respond with JSON encoded array of data and you should parse it and pass to dataTable as it noted here.
I want to fetch object from servlet.
I try below code but I get "[object Object]" . I want "Description" value.
I got out in browser when I run http://www.host.com/f/ServletToJSP1/*
o/p {"Description":"Nutanix provides disruptive datacenter infrastructure solutions that are hyper-efficient, massively scalable and elegantly simple."}
in console log :Uncaught ReferenceError: google is not defined
How can I do that ?
jsp code
$.ajax({
url : 'ServletToJSP1',
type : 'GET',
dataType : 'json',
success : function(response) {
//response = $.parseJSON(response);
alert(response);
},
error : function(error) {
//error handling....
alert(error);
}
});
servlet code
JSONObject objTw = new JSONObject();
objTw.put("Description", "Nutanix provides disruptive datacenter infrastructure solutions that are hyper-efficient, massively scalable and elegantly simple.");
PrintWriter out = response.getWriter();
response.setContentType("application/json");
response.setCharacterEncoding("utf-8");
out.println(objTw);
Access the description property on the response object.
$.ajax({
url : 'ServletToJSP1',
type : 'GET',
dataType : 'json',
success : function(response) {
//response = $.parseJSON(response);
alert(response.Description);
},
error : function(error) {
//error handling....
alert(error);
}
});
Are you developing in Chrome?
You can open the dev tools with CTRL+SHIFT+I then open the Console.
Instead of alert(respone) try console.log(response) to have a deeper look into the variable.
Try
success : function(response) {
alert(response[0].Description);
},
and in your servlet code try to add out.flush();