<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Celery example</title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.2.0/css/bootstrap.min.css"
integrity="sha512-XWTTruHZEYJsxV3W/lSXG1n3Q39YIWOstqvmFsdNEEQfHoZ6vm6E9GK2OrF6DSJSpIbRbi+Nn0WDPID9O7xB2Q=="
crossorigin="anonymous" referrerpolicy="no-referrer"/>
</head>
<body>
<div class="container">
<div class="row">
<div class="col-12 col-md-4">
<form id="your-form">
<div class="mb-3">
<label for="email" class="form-label">Email address</label>
<input type="email" class="form-control" id="email" name="email">
</div>
<div class="mb-3">
<label for="username" class="form-label">Username</label>
<input type="text" class="form-control" id="username" name="username">
</div>
<div class="mb-3" id="messages"></div>
<button type="submit" class="btn btn-primary">Submit</button>
</form>
</div>
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.2.0/js/bootstrap.min.js"
integrity="sha512-8Y8eGK92dzouwpROIppwr+0kPauu0qqtnzZZNEF8Pat5tuRNJxJXCkbQfJ0HlUG3y1HB3z18CSKmUo7i2zcPpg=="
crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script>
function updateProgress(yourForm, task_id, btnHtml) {
const ws_url = `/ws/task_status/${task_id}`;
const WS = new WebSocket((location.protocol === 'https:' ? 'wss' : 'ws') + '://' + window.location.host + ws_url);
WS.onmessage = function (event) {
const res = JSON.parse(event.data);
const taskStatus = res.state;
if (['SUCCESS', 'FAILURE'].includes(taskStatus)) {
const msg = yourForm.querySelector('#messages');
const submitBtn = yourForm.querySelector('button[type="submit"]');
if (taskStatus === 'SUCCESS') {
msg.innerHTML = 'job succeeded';
} else if (taskStatus === 'FAILURE') {
msg.innerHTML = res.error;
}
submitBtn.disabled = false;
submitBtn.innerHTML = btnHtml;
// close the websocket because we do not need it now
WS.close();
}
}
}
function serialize (data) {
let obj = {};
for (let [key, value] of data) {
if (obj[key] !== undefined) {
if (!Array.isArray(obj[key])) {
obj[key] = [obj[key]];
}
obj[key].push(value);
} else {
obj[key] = value;
}
}
return obj;
}
document.addEventListener("DOMContentLoaded", function () {
const yourForm = document.getElementById("your-form");
yourForm.addEventListener("submit", function (event) {
event.preventDefault();
const submitBtn = yourForm.querySelector('button[type="submit"]');
const btnHtml = submitBtn.innerHTML;
const spinnerHtml = 'Processing...';
submitBtn.disabled = true;
submitBtn.innerHTML = spinnerHtml;
const msg = yourForm.querySelector('#messages');
msg.innerHTML = '';
// Get all field data from the form
let data = new FormData(yourForm);
// Convert to an object
let formData = serialize(data);
fetch('/users/form/', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify(formData),
})
.then(response => response.json())
.then((res) => {
// after we get Celery task id, we start polling
const task_id = res.task_id;
updateProgress(yourForm, task_id, btnHtml);
console.log(res);
}).catch((error) => {
console.error('Error:', error);
});
});
});
</script>
</body>
</html>