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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<script src="https://code.jquery.com/jquery-3.3.1.js"></script>
<title></title>
</head>
<body>
<div id="a1" data-filename="2018.rar">下載</div>
<div id="progressing"></div>
<script>
$('#a1').click(function () {
var that = this;
var page_url = 'http://localhost/test.php';
var req = new XMLHttpRequest();
req.open("get", page_url, true);
//監聽進度事件
req.addEventListener("progress", function (evt) {
if (evt.lengthComputable) {
var percentComplete = evt.loaded / evt.total;
console.log(percentComplete);
$("#progressing").html((percentComplete * 100) + "%");
}
}, false);
req.responseType = "blob";
req.onreadystatechange = function () {
if (req.readyState === 4 && req.status === 200) {
var filename = $(that).data('filename');
if (typeof window.chrome !== 'undefined') {
// Chrome version
var link = document.createElement('a');
link.href = window.URL.createObjectURL(req.response);
link.download = filename;
link.click();
} else if (typeof window.navigator.msSaveBlob !== 'undefined') {
// IE version
var blob = new Blob([req.response], { type: 'application/force-download' });
window.navigator.msSaveBlob(blob, filename);
} else {
// Firefox version
var file = new File([req.response], filename, { type: 'application/force-download' });
window.open(URL.createObjectURL(file));
}
}
};
req.send();
});
</script>
</body>
</html>
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