I want to have a progressbar that take data from server, so I created 2 servlets the first one (process) starts the process and when it ends return the result; the second one (GetEvent) gets progress information from session every 500ms..
All of this works normally and the progress information is displayed correctly, but the
process Servlet's callback never executes.
<html>
<head>
<link href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/base/jquery-ui.css" rel="stylesheet" type="text/css"/>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.5/jquery.min.js"></script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/jquery-ui.min.js"></script>
<script>
$(document).ready(function() {
process();
$("#progressbar").progressbar({ value: 0 });
$("#progressStatus").html("");
getEvent();
});
function process()
{
$.getJSON("process", function(result){
//never executed
alert( "Result: " );
});
}
function getEvent()
{
$.getJSON("GetProgressEvent", function(data) {
$.each(data.ProgressEvents, function(){
$("#progressbar").progressbar({ value: this.progress });
$("#progressStatus").html(this.status);
});
});
setTimeout(getEvent, 500);
}
</script>
</head>
<body style="font-size:62.5%;">
<div id="progressbar"></div>
<div id ="progressStatus"></div>
</body>
</html>
I just started with JQuery and I don't know what's wrong with this code.
you are calling $.getJSON with a url "process"
this function has no error handling if there is problem with the response or invalid JSON is returned then the callback will not be called.
http://api.jquery.com/jQuery.getJSON/
jQuery.getJSON( url, [data], [success(data, textStatus, jqXHR)] )
url A string containing the URL to which the request is sent.
data A map or string that is sent to the server with the request.
success(data, textStatus, jqXHR)A callback function that is executed if the request succeeds.
Try adding a valid url in place of "process" and if that fails use the
$.ajax method as follows
$.ajax({
url: "mydomain.com/url",
type: "POST",
dataType: "json",
data: $.param( $("Element or Expression") ),
complete: function() {
//called when complete
},
success: function() {
//called when successful
},
error: function() {
//called when there is an error
},
});
Related
I have been struggling to render a data object returned by an API request on an HTML page, however it keeps displaying the string object on the HTML page. Another problem is that I am not able to make use of the data object returned by the API request outside of the API function in Javascript. See the code below:
The API request, the console.log(data) outside the API function does not work
var params = {
// Request parameters
};
$.ajax({
url:
"https://failteireland.azure-api.net/opendata-api/v1/attractions?" +
$.param(params),
beforeSend: function (xhrObj) {
// Request headers
xhrObj.setRequestHeader(
"Ocp-Apim-Subscription-Key",
"ef4ed92186214c868a59d97c3b353661"
);
},
type: "GET",
// Request body
data: "{body}",
})
.done(function (data) {
console.log(data);
document.getElementById("data").innerHTML = data.results;
})
.fail(function () {
alert("error");
});
});
console.log(data);
The HTML Page
<html>
<head>
<title>JSSample</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script src="main.js"></script>
</head>
<body>
<div id="data"></div>
</body>
</html>
You need to pass in a callback function to handle the returned data.
function do_request(cb, cb_fail) {
var params = {};
$.ajax({
url:
"https://failteireland.azure-api.net/opendata-api/v1/attractions?" +
$.param(params),
beforeSend: function (xhrObj) {
// Request headers
xhrObj.setRequestHeader(
"Ocp-Apim-Subscription-Key",
"ef4ed92186214c868a59d97c3b353661"
);
},
type: "GET",
// Request body
data: "{body}",
})
.done(cb)
.fail(cb_fail);
}
function cb(data) {
// you now have access to the data here
document.getElementById("data").innerHTML = JSON.stringify(data.results)
}
function cb_fail(error) {
console.log(error)
}
do_request(cb, cb_fail)
I want to receive judgement result from model of Azure Custom Vision by using JavaScript.
I changed JavaScript code that this site has.
https://southcentralus.dev.cognitive.microsoft.com/docs/services/eb68250e4e954d9bae0c2650db79c653/operations/58acd3c1ef062f0344a42814
But I can't.
What is wrong with my code?
I changed IterationId, application, url, content-Type, Prediction-key, and data.
These part are enclosed with {} in the code below.
<!DOCTYPE html>
<html>
<head>
<title>Human</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js">
</script>
</head>
<body>
<script type="text/javascript">
$(function() {
var params = {
// Request parameters
"iterationId": "{Iteration id that showed in Performance Page}",
"application": "{My Project name of Custom Vision}",
};
$.ajax({
url: "{url that showed in "How to use the Prediction API"}" + $.param(params),
beforeSend: function(xhrObj){
// Request headers
xhrObj.setRequestHeader("Content-Type","application/octet-stream");
xhrObj.setRequestHeader("Prediction-key","{my prediction key that showed in "How to use the Prediction API"}");
},
type: "POST",
// Request body
data: "D:\some name\some name\image.jpg",
})
.done(function(data) {
alert("success");
})
.fail(function() {
alert("error");
});
});
</script>
</body>
</html>
Of course, I expected showing "success".
But, the actual output is "error"......
When I changed URL that this site has(https://southcentralus.dev.cognitive.microsoft.com/docs/services/eb68250e4e954d9bae0c2650db79c653/operations/58acd3c1ef062f0344a42814) in my code, I can get Success message.
And, I also write
processData: false,
contentType: false,
in ajax in my code
Change your code to see what is the error that you get back:
(Note the new "error" parameter to the request)
$.ajax({
url: "{url that showed in "How to use the Prediction API"}" + $.param(params),
beforeSend: function(xhrObj){
// Request headers
xhrObj.setRequestHeader("Content-Type","application/octet-stream");
xhrObj.setRequestHeader("Prediction-key","{my prediction key that showed in "How to use the Prediction API"}");
},
type: "POST",
// Request body
data: "D:\some name\some name\image.jpg",
error: function(xhr,status,error) {
// >>>>>>>>>>>> CHECK HERE THE ERROR <<<<<<<<<<<<
}
})
.done(function(data) {
alert("success");
})
.fail(function() {
alert("error");
});
Once you have the error, it would be easier to help you.
I have the following code
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>
</head>
<body style="background-color:yellow;width:100%;height:100%;">
test
<script>
function test() {
$("body").css("cursor","wait"); //cursor must be changed here
$.ajax(...);
}
</script>
</body>
</html>
The problem with this code is that cursor changes from default to wait in browser only when function test() is completed, but I need it to change in certain point of function. I tried in FF 58 on Ubuntu 14 and in Opera in Windows 7. I've read many posts about it and tried also this solution
$(document).ajaxStart(function() {
$(document.body).css({'cursor' : 'wait'});
}).ajaxStop(function() {
//$(document.body).css({'cursor' : 'default'});
});
but without success. How to fix it? Any ideas?
I found the answer. I had in my ajax async:false -
$.ajax({ ...
async: false,
...
});
When I changed to
$.ajax({ ...
async: true,
...
});
everything started to work as expected.
$(document).ajaxStart(function (event, jqxhr, settings) {
$(document.body).css({ 'cursor': 'wait' });
});
$(document).ajaxComplete(function (event, jqxhr, settings) {
$(document.body).css({ 'cursor': 'normal' });
});
$(document).ajaxError(function (event, request, settings) {
$(document.body).css({ 'cursor': 'normal' });
});
function AjaxCall() {
$.ajax({
type: "POST",
url: '/home/AjaxURL',
contentType: "application/json; charset=utf-8",
global: true,// this makes sure ajax set up ajaxStart/ajaxComplete/ajaxerror will triggered
dataType: "json",
success: function () { },
error: function () { }
});
}
$(document).ready(function () {
AjaxCall();
});
Note- Setting the cursor to document.body as you did means it will only apply in document and did not apply in other dom elements like anchor, textbox etc
You can use before send like this:
$.ajax({
beforeSend: function(){
// Handle the beforeSend event
},
complete: function(){
// Handle the complete event
}
// ......`enter code here`
});
OR use when and timeout:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
function ajaxready() {
setTimeout(function() {
$.ajax({
url: "https://www.w3schools.com/jquery/demo_test.txt",
beforesend: function() {},
success: function(result) {
$("#div1").html(result);
$("body").css("cursor", "");
}
});
}, 500);
}
function loading() {
$("body").css("cursor", "wait"); //cursor must be changed here
}
$(document).ready(function() {
$("button").click(function() {
$.when(loading()).done(function() {
ajaxready();
});
});
});
</script>
<style>
button {
cursor: inherit
}
</style>
</head>
<body>
<div id="div1">
<h2>Let jQuery AJAX Change This Text</h2>
</div>
<span></span>
<button>Get External Content</button>
</body>
</html>
I am trying to get JSON data from Microoft Project Oxford through a API call. I followed the API reference but when I make a call I get a 404 error.
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
</head>
<body>
<script type="text/javascript">
$(function() {
var params = {
// Request parameters
"visualFeatures": "All",
};
$.ajax({
url: "https://api.projectoxford.ai/vision/v1/analyses&" + $.param(params),
beforeSend: function(xhrObj){
// Request headers
xhrObj.setRequestHeader("Content-Type","application/json");
xhrObj.setRequestHeader("Ocp-Apim-Subscription-Key","0000000000000000");
},
type: "POST",
// Request body
data: '{ "Url": "http://www.sweetheartmotors.ca/sites/default/files/audi_PNG1736.png" }',
})
.done(function(data) {
alert("success");
//display data
console(data);
})
.fail(function() {
alert("error");
});
});
</script>
What is stopping me from making the call?
You need to change the URL to end in a question mark, rather than an ampersand: https://api.projectoxford.ai/vision/v1/analyses?
Unfortunately most of the samples on the projectoxford.ai site contain this error.
I have a problem when trying to get response from URL or PHP script. When I click on a button that runs this function clicked() it gives normal response in DreamWeaver but when clicked in browser it returns error. I've searched answers but nothing really helped.
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Log In</title>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
</head>
// I've deleted buttons and other stuff from this example code so it can be easier to read
<script language="javascript">
function clicked(){
$.ajax("test.php", {
type: 'GET',
dataType: 'text',
success: function (data, textStatus, jqXHR) {
var returned_data = data;
alert("returned_data ="+returned_data);
},
error: function( req, status, err ) {
alert( 'something went wrong', status, err );
}
});
</script>
</html>
PHP script is working fine, some other problem is here but I can't seem to see it.
You are missing a closing brace at the end of your script.
it should be:
<script language="javascript">
function clicked(){
$.ajax("test.php", {
type: 'GET',
dataType: 'text',
success: function (data, textStatus, jqXHR) {
var returned_data = data;
alert("returned_data ="+returned_data);
},
error: function( req, status, err ) {
alert( 'something went wrong', status, err );
}
});
}
</script>
Your code works on Dreamweaver because it has a built in Apache server, although you are not using one in your production environment.