<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>CRC64</title>
<style>
h1 {
font-weight: normal;
}
</style>
</head>
<body>
<div>
<h1>JS 计算 CRC64</h1>
<form id="form">
<label>选择文件，计算 crc64：</label>
<input id="file" type="file">
</form>
<div id="msg"></div>
</div>
<script src="./crc64.js"></script>
<script>
var el = function (id) {
return document.getElementById(id);
};
var calc = function (file) {
var time0 = Date.now();
CRC64.file_crc64(file, function (err, hash) {
if (err) return console.log('crc64 error:', err);
var time1 = Date.now();
el('msg').innerHTML = 'cost ' + (time1 - time0) + 'ms, crc64=' + hash;
el('form').reset();
}, function (percent) {
el('msg').innerHTML = (percent * 100).toFixed(2) + '%';
});
};
el('file').onchange = function () {
var file = this.files[0];
calc(file);
};
// calc string crc64
console.log(CRC64.crc64('123456789'));
</script>
</body>
</html>