谁若想在困厄时得到援助，就应在平日待人以宽——萨迪
分享一个获取文件信息的js库MediaInfo.js
代码仓库：
https://github.com/buzz/mediainfo.js
代码如下：
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
| <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script type="text/javascript" src="https://unpkg.com/mediainfo.js/dist/mediainfo.min.js"></script>
</head>
<body>
<input id="fileinput" type="file" />
<script>
const fileinput = document.getElementById('fileinput')
const onChangeFile = (mediainfo) => {
const file = fileinput.files[0]
if (file) {
console.log({ file });
const getSize = () => file.size
const readChunk = (chunkSize, offset) =>
new Promise((resolve, reject) => {
const reader = new FileReader()
reader.onload = (event) => {
if (event.target.error) {
reject(event.target.error)
}
resolve(new Uint8Array(event.target.result))
}
reader.readAsArrayBuffer(file.slice(offset, offset + chunkSize))
})
mediainfo
.analyzeData(getSize, readChunk)
.then((result) => {
console.log({ result })
})
.catch((error) => {
console.error(`An error occured:\n${error.stack}`)
})
}
}
MediaInfo({ format: 'text' }, (mediainfo) => {
fileinput.addEventListener('change', () => onChangeFile(mediainfo))
})
</script>
</body>
</html>
|
任意选择一个文件
